139 results on '"Ramírez M"'
Search Results
2. Bioprospecting of aerobic endospore-forming bacteria with biotechnological potential for growth promotion of banana plants
- Author
-
Universidad EAFIT. Departamento de Ciencias, Ciencias Biológicas y Bioprocesos (CIBIOP), Posada, L.F., Ramírez, M., Ochoa-Gómez, N., Cuellar-Gaviria, T.Z., Argel-Roldan, L.E., Ramírez, C.A., Villegas-Escobar, V., Universidad EAFIT. Departamento de Ciencias, Ciencias Biológicas y Bioprocesos (CIBIOP), Posada, L.F., Ramírez, M., Ochoa-Gómez, N., Cuellar-Gaviria, T.Z., Argel-Roldan, L.E., Ramírez, C.A., and Villegas-Escobar, V.
- Abstract
High amounts of agrochemicals are regularly used for increasing yields in cultivation of banana. The use of plant growth-promoting rhizobacteria (PGPR) could represent an environmentally friendly alternative that can improve productivity. In this study, we tested a funnel-like strategy to bioprospect aerobic endospore-forming bacteria (AEFB) that could be useful to develop a biotechnological product to promote the growth of banana plants. First, 837 aerobic endospore-forming bacteria were obtained from the rhizosphere of banana and plantain. Then, the isolates were assessed for both: their capacity to promote growth of maize seedlings (used as a model plant) and to display specific biochemical PGPR-associated traits. Twenty-two of these strains significantly increased the dry weight of maize seedlings, some of them showing in vitro PGPR traits. Based on this screening, four isolates were selected to conduct evaluations on banana plants, from which, the bacterial strain Bacillus subtilis EA-CB0575 was chosen as a promising plant growth -promoting isolate. Further studies with this strain showed that the application of either spores, vegetative cells (both at concentrations 1 x 10(7) and 1 x 10(8) CFU/mL), or the cell-free supernatant (CFS) of its fermentation significantly increased the dry weight of banana plants, compared with the non-treated control. Our results suggest that both cellular structures of B. subtilis EA-CB0575 and the metabolites and/or elements contained in its CFS enhance the growth and development of banana plants. (C) 2016 Elsevier B.V. All rights reserved.
- Published
- 2021
3. Biofilters
- Author
-
Cabrera, G., primary, Ramírez, M., additional, and Cantero, D., additional
- Published
- 2011
- Full Text
- View/download PDF
4. Scaffold/Matrix-Attached Regions: Structural Properties Creating Transcriptionally Active Loci
- Author
-
Bode, J., primary, Schlake, T., additional, Ríos-Ramírez, M., additional, Mielke, C., additional, Stengert, M., additional, Kay, V., additional, and Klehr-Wirth, D., additional
- Published
- 1996
- Full Text
- View/download PDF
5. Ensayos clínicos precoces en oncología pediátrica en España: una perspectiva nacional
- Author
-
Bautista F, Gallego S, Cañete A, Mora J, Díaz de Heredia C, Cruz-Martínez O, Fernández JM, Rives-Sola S, Berlanga P, Hladun R, Juan Ribelles A, Madero L, Ramírez M, Fernández Delgado R, Pérez-Martínez A, Mata C, Llort A, Martín Broto J, Cela ME, Ramírez G, Sábado C, Acha T, Astigarraga I, Sastre A, Muñoz A, Guibelalde M, Moreno L, and Sociedad Española de Hematología y Oncología Pediátrica (SEHOP)
- Subjects
Desarrollo de nuevos fármacos ,Paediatric haematology and oncology ,Early phase clinical trials ,Drug development ,Personalised medicine ,Medicina personalizada ,Ensayos clínicos precoces ,Oncología y hematología pediátrica - Abstract
INTRODUCTION: Cancer is the leading cause of death between the first year of life and adolescence, and some types of diseases are still a major challenge in terms of cure. There is, therefore, a major need for new drugs. Recent findings in cancer biology open the door to the development of targeted therapies against individual molecular changes, as well as immunotherapy. Promising results in adult anti-cancer drug development have not yet been translated into paediatric clinical practice. A report is presented on the activity in early paediatric oncology trials (phase I-II) in Spain. MATERIAL AND METHODS: All members of the Spanish Society of Paediatric Haematology Oncology (SEHOP) were contacted in order to identify early clinical trials in paediatric cancer opened between 2005 and 2015. RESULTS: A total of 30 trials had been opened in this period: 21 (70%) in solid tumours, and 9 (30%) in malignant haemopathies. A total of 212 patients have been enrolled. The majority was industry sponsored (53%). Since 2010, four centres have joined the international consortium of Innovative Therapies for Children with Cancer (ITCC), which has as its aim to develop novel therapies for paediatric tumours. A significant number of new studies have opened since 2010, improving the treatment opportunities for our children. Results of recently closed trials show the contribution of Spanish investigators, the introduction of molecularly targeted agents, and their benefits. CONCLUSIONS: The activity in clinical trials has increased in the years analysed. The SEHOP is committed to develop and participate in collaborative academic trials, in order to help in the advancement and optimisation of existing therapies in paediatric cancer.
- Published
- 2017
6. Synthesis of Ba0.75Sr0.25Al2Si2O8 - ZrO2 Ceramic Composites by Solid State Reaction of Mechanically Activated Precursor Mixtures
- Author
-
Ramos-Ramírez, M. V., López-Cuevas, J., Rodríguez-Galicia, J. L., and Rendón-Angeles, J. C.
- Subjects
Celsian ,lcsh:TP785-869 ,Mechanical activation ,Solid state reaction ,Reacción en el estado sólido ,Propiedades mecánicas ,lcsh:Clay industries. Ceramics. Glass ,Activación Mecánica ,Cenizas Volantes ,Mechanical properties ,Fly ash ,Celsiana - Abstract
Precursor mixtures composed of fly ash, BaCO3, SrCO3, Al2O3 and ZrO2, were subjected to attrition milling for 0-8 h and then uniaxially pressed and sintered at 900-1500 °C/5 h, for the in situ solid state synthesis of composites with nominal Ba0.75Sr0.25Al2Si2O8 (SBAS)/ZrO2 mass ratios of: 1) 90/10, 2) 70/30, and 3) 50/50. Mechanical activation, combined with the likely generation of a considerable amount of transient liquid during sintering of the composites, notably enhanced the reactivity of the precursor mixtures. ZrO2 decreased the conversion from the hexagonal (Hexacelsian) into the monoclinic (Celsian) phases of SBAS in the composites, which became more pronounced when the content of ZrO2 was increased in the materials. Nearly full conversions could be achieved at temperatures as low as 1100 °C, by mechanically activating the precursor mixtures for times that increased with increasing content of ZrO2 in the materials. An increment in the time of mechanical activation of the precursor mixtures, as well as in their ZrO2 content and in the sintering temperature, increased the mechanical properties of the synthesized materials. Thus, the best mechanical properties were obtained for composition 3 milled for 8 h and sintered at 1500 °C.Mezclas precursoras de cenizas volantes, BaCO3, SrCO3, Al2O3 y ZrO2, fueron activadas mecánicamente en un molino de atrición por 0-8 h y luego prensadas uniaxialmente y sinterizadas a 900-1500 °C/5 h, para la síntesis in situ por reacción en el estado sólido de compósitos con relaciones nominales Ba0.75Sr0.25Al2Si2O8 (SBAS)/ZrO2 en masa de: 1) 90/10, 2) 70/30, y 3) 50/50. La activación mecánica, combinada con la probable generación de una cantidad considerable de líquido transitorio, incrementó notablemente la reactividad de las mezclas precursoras. La ZrO2 disminuyó la conversión de la fase hexagonal (Hexacelsiana) a la monoclínica (Celsiana) del SBAS, lo cual fue más pronunciado cuando el contenido de ZrO2 se incrementó en los compósitos. Fue posible obtener conversiones casi completas a temperaturas tan bajas como 1100 °C, activando mecánicamente las mezclas precursoras por tiempos que se incrementaron con el incremento en el contenido de ZrO2 en los materiales. El incremento en el tiempo de activación mecánica de las mezclas precursoras, así como en su contenido de ZrO2 y en la temperatura de sinterización, incrementó las propiedades mecánicas de los materiales sintetizados. Así, las mejores propiedades mecánicas correspondieron a la composición 3 molida por 8 h y sinterizada a 1500 °C.
- Published
- 2014
7. Solid state reaction synthesis of Ba0.75Sr0.25AlSi2O8 - Al2O3 ceramic composites from mechanically activated precursor mixtures
- Author
-
Ramos-Ramírez, M. V., López-Cuevas, J., Rodríguez-Galicia, J. L., and Rendón-Angeles, J. C.
- Subjects
Celsian ,lcsh:TP785-869 ,Coal Fly Ash ,lcsh:Clay industries. Ceramics. Glass ,Ceramic Composites ,Activación Mecánica ,Cenizas Volantes ,Celsiana ,Compósitos Cerámicos ,Mechanical Activation - Abstract
Ceramic composites with Ba0.75Sr0.25AlSi2O8 (SBAS)/Al2O3 mass ratios of: 1) 90/10, 2) 70/30, and 3) 50/50, were in situ synthesized at 900-1500 °C/5 h from mixtures of fly ash, BaCO3, SrCO3 and Al2O3. The green mixtures were mechanically activated for 0, 4 and 8 h in an attrition mill. As a result, the solid state reactions were faster and occurred at lower temperatures. Only the SBAS and Al2O3 phases were obtained at 1300-1500°C, with the SBAS present in composition 1 achieving full conversion from its hexagonal (Hexacelsian) into its monoclinic (Celsian) form, with or without milling. The higher nominal SBAS content of composition 1 facilitated in it the mentioned conversion, in comparison with the other two studied compositions, which required to be mechanically activated for times that increased with increasing Al2O3 content, in order to attain in them similarly high Hexacelsian to Celsian conversions. The mechanical properties of the synthesized materials increased with increasing milling time, sintering temperature and Al2O3 content. Thus, the best mechanical properties were obtained for composition 3 milled for 8 h and sintered at 1500 °C.Compósitos cerámicos con relaciones Ba0.75Sr0.25AlSi2O8 (SBAS)/Al2O3 en masa de: 1) 90/10, 2) 70/30, y 3) 50/50, fueron sintetizados in situ a 900-1500 °C/5 h usando mezclas de cenizas volantes, BaCO3, SrCO3 y Al2O3 . Las mezclas en verde fueron activadas mecánicamente por 0, 4 y 8 h en un molino de atrición. Como resultado, las reacciones en el estado sólido fueron más rápidas y ocurrieron a menores temperaturas. A 1300-1500°C sólo se obtuvo las fases SBAS y Al2O3 , con el SBAS presente en la composición 1 transformado completamente de su forma hexagonal (Hexacelsiana) a la monoclínica (Celsiana), con o sin molienda. El mayor contenido nominal de SBAS en esa composición facilitó dicha conversión, en comparación con las otras dos composiciones estudiadas, las cuales requirieron ser activadas mecánicamente por tiempos que se incrementaron con el incremento en su contenido de Al2O3 , para que pudiesen alcanzar conversiones Hexacelsiana a Celsiana similarmente altas. Las propiedades mecánicas de los materiales sintetizados se incrementaron con el incremento en el tiempo de molienda, en la temperatura de sinterización y en el contenido de Al2O3. De esta manera, las mejores propiedades mecánicas correspondieron a la composición 3 molida por 8 h y sinterizada a 1500 °C.
- Published
- 2014
8. A note on a family of non-gravitational central force potentials in dimension one
- Author
-
Universitat Politècnica de Catalunya. Departament de Matemàtiques, Alvarez-Ramírez, M., Corbera Subirana, Montserrat, Cors Iglesias, Josep Maria, García, A., Universitat Politècnica de Catalunya. Departament de Matemàtiques, Alvarez-Ramírez, M., Corbera Subirana, Montserrat, Cors Iglesias, Josep Maria, and García, A.
- Abstract
In this work, we study a one-parameter family of differential equations and the different scenarios that arise with the change of parameter. We remark that these are not bifurcations in the usual sense but a wider phenomenon related with changes of continuity or differentiability. We offer an alternative point of view for the study for the motion of a system of two particles which will always move in some fixed line, we take R for the position space. If we fix the center of mass at the origin, the system reduces to that of a single particle of unit mass in a central force field. We take the potential energy function U(x)=|x|ß, where x is the position of the single particle and ß is some positive real number., Postprint (published version)
- Published
- 2017
9. From certification to recertification the benefits and challenges of the Marine Stewardship Council (MSC): A case study using lobsters
- Author
-
Bellchambers, L., Phillips, Bruce, Pérez-Ramírez, M., Bellchambers, L., Phillips, Bruce, and Pérez-Ramírez, M.
- Abstract
This paper compares two lobster fisheries, the Western Australian rock lobster (Panulirus cygnus) and the Mexico Baja California red rock lobster (Panulirus interruptus) that have been certified and re-certified by the Marine Stewardship Council (MSC), and compares the benefits and challenges associated with the certification process. Both fisheries have had similar conditions imposed to address deficiencies identified in the assessment process. The conditions included a better understanding of target stock status, improving monitoring and reporting of bycatch and Endangered Threatened and Protected species (ETPs), improving the understanding of the potential impacts of fishing on the ecosystem and implementing research plans. Providing the data to address these conditions was both expensive and time consuming but improved the understanding of these fisheries. Currently, MSC certified lobster accounts for approximately 20% of global lobster harvest. However, there is no evidence of a price premium for either Western Australian or Mexican Baja California lobster. At present, the vast majority of both lobster species sold are not tagged with the MSC logo due to the additional cost associated with its use. Despite the differences in species, landings and value, the Western Australian rock lobster and Mexican Baja California red rock lobster fisheries have had similar experiences in the benefits and challenges of the MSC process. In the case of the two lobster fisheries examined here, and undoubtedly in a number of other fisheries around the world where domestic or international market recognition of MSC is not high, the social and political benefits of certification far outweigh any economic incentive.
- Published
- 2015
10. Design of the back-up system in Patio 2.12 photovoltaic installation
- Author
-
Universidad de Sevilla. Departamento de Proyectos Arquitectónicos, García Domingo, Beatriz, Torres-Ramírez, M., Casa, J.A. de la, Aguilera Tejero, Jorge, Terrados Cepeda, Francisco Javier, Universidad de Sevilla. Departamento de Proyectos Arquitectónicos, García Domingo, Beatriz, Torres-Ramírez, M., Casa, J.A. de la, Aguilera Tejero, Jorge, and Terrados Cepeda, Francisco Javier
- Abstract
Andalucía team presented in the Solar Decathlon Europe 2012 competition a proposal of a modular, sustainable, self-sufficient housing, Patio 2.12. Inspired by Mediterranean style, Patio 2.12 was composed of four habitable modules around a common space (“patio”). Each habitable module has a photovoltaic system on its roof. Simplicity and modularity determined the design of the photovoltaic system so that, together with a global electrical energy management system, the use of the locally generated electrical energy can be optimized. Amongst others, a remarkable innovation included in Patio 2.12 was the use of an intelligent controlling device, based on an energetic support system that could manage the flows of electrical energy of all elements of the electrical installation integrated in the house. This system allows adapting the electricity availability to the consumption demand,maximizing the amount of photovoltaic energy locally generated and instantaneously consumed. This paper implements the use of a simulation software model to analyze the electrical energy balance ofthe photovoltaic electrical installation. This model estimates the electrical photovoltaic generation and the electrical exchanges with the grid and the battery bank, under a determined load profile, and for a specific period of time, using environmental data as inputs to the model.
- Published
- 2014
11. Bacteriophage performance against Staphylococcus aureus in milk is improved by high hydrostatic pressure treatments
- Author
-
Ministerio de Ciencia e Innovación (España), Junta de Extremadura, European Commission, Tabla, R., Martínez Fernández, Beatriz, Rebollo, B., González, J., Ramírez, M. R., Roa, I., Rodríguez González, Ana, García Suárez, María Pilar, Ministerio de Ciencia e Innovación (España), Junta de Extremadura, European Commission, Tabla, R., Martínez Fernández, Beatriz, Rebollo, B., González, J., Ramírez, M. R., Roa, I., Rodríguez González, Ana, and García Suárez, María Pilar
- Abstract
The combined effect of bacteriophages, vB_SauS-phi-IPLA35 (phiIPLA35) and vB_SauS-phi-IPLA88 (phiIPLA88), and high hydrostatic pressure (HHP) on Staphylococcus aureus Sa9 was evaluated in pasteurized whole milk under a simulated cold chain break, which was simulated by incubation of milk at 25°C for 48h. Four-hundred MPa was found to be the most suitable pressure to be used in combination with these phages. Two different levels of staphylococcal initial contamination (1×10 4 and 1×10 6CFU/mL) were tested. A synergistic effect between HHP and phages was observed in both cases. Compared to each single treatment, the combined treatment was able to reduce the initial S. aureus contamination below the detection limit (<10CFU/mL). Bacteriophage performance in pressurize milk against S. aureus enabled milder hydrostatic pressure treatments, therefore phages can be regarded as a valuable hurdle on minimally processed food. © 2012 Elsevier B.V..
- Published
- 2012
12. Effect of pressure and holding time on colour, protein and lipid oxidation of sliced dry-cured Iberian ham and loin during refrigerated storage
- Author
-
Cava, R., Ladero, Luis, Gonzaléz, Santiago, Carrasco Miral, Ana, Ramírez, M. R., Cava, R., Ladero, Luis, Gonzaléz, Santiago, Carrasco Miral, Ana, and Ramírez, M. R.
- Abstract
The effect of high pressure (HP) treatments (200 MPa 15 min, 200 MPa 30 min, 300 MPa 15 min, 300 MPa 30 min) on colour, lipid and protein oxidation in sliced vacuum-packed dry-cured Iberian ham and loin during refrigerated storage (90 days, + 4 °C) was evaluated. Pressure level and holding time increased the extent of lipid oxidation in both products. Dry-cured ham showed a higher susceptibility to lipid oxidation than dry-cured loin since HP treatment increased TBA-RS values in dry-cured ham samples while HP treatment decreased TBA-RS values in dry-cured loin samples. However, HP treatment did not affect protein oxidation in both meat products. On the other hand, HP treatment affected instrumental colour since non-pressurized dry-cured meat products showed higher redness than pressurized ones. Regarding changes under storage, after 90 days of refrigerated storage lipid and protein oxidation increased while redness decreased in both HP treated and non-treated dry-cured meat products. Changes induced by HP were only noticeable after HP treatment, as storage reduced the initial differences between HP treated and non-treated samples. Therefore, the lack of differences in long stored dry-cured ham and loin HP treated and non-treated indicates that the application of HP (200-300 MPa/15-30 min) could not affect the quality of dry-cured meat products. Industrial relevance: Dry-cured meat products are the meat-based products with the highest sensory quality in Spain and have a high projection in exterior markets. High pressure processing is effective in controlling pathogen and spoilage microorganisms in meat and meat products although it can promote color and oxidation changes that modify sensory characteristics. The study aimed the evaluation of pressure and holding time on color changes and protein and lipid oxidation at vacuum packed slices of Iberian dry-cured ham and loin during subsequent extended chilled storage. High pressure treatment of dry-cured Iberian ham and
- Published
- 2009
13. Time calibration and positioning for KM3NeT
- Author
-
Hernández Rey, Juan José, Toscano, Simona, Ardid Ramírez, M., Circella, M., Perkin, J., Schuller, J-P., Thompson, L. F., Bou Cabo, Manuel, Hernández Rey, Juan José, Toscano, Simona, Ardid Ramírez, M., Circella, M., Perkin, J., Schuller, J-P., Thompson, L. F., and Bou Cabo, Manuel
- Abstract
In this contribution we review the concepts put forward for the time calibration and positioning systems of the future KM3NeT neutrino telescope in the Mediterranean Sea. Even though the final layout of the detector, its mechanical structures and the light detection technologies to be used are not yet defined, much progress has been made in clarifying the possible technologies available for calibration and positioning. Concerning time calibration, we review the different concepts proposed, namely optical beacons (LED and laser), fibres or copper cables, 40K, and a pre-deployment calibration. For positioning, the use of acoustic signals with lower frequency components in combination with cheaper hydrophones than in ANTARES is being investigated. The need and use of compasses and tiltmeters is strongly correlated to the mechanical structure chosen. For absolute positioning several methods are being considered. In the following, the solutions proposed in the KM3NeT Conceptual Design Report (CDR) [2001, available at: left angle brackethttp://www.km3net.org/CDR/right-pointing angle bracket] are discussed.
- Published
- 2009
14. Valor pronóstico de alpha-fetoproteína (AFP) en cáncer hepatocelular de portadores crónicos del AgHBs y AgHBe positivos
- Author
-
Carrascosa, Diana, Casado Moragón, Ángela, Ramírez, M. V., and Sáez, Julia
- Subjects
education - Published
- 1996
15. Effect of irradiation on colour and lipid oxidation of dry-cured hams from free-range reared and intensively reared pigs
- Author
-
Cava, R, Tárrega, R, Ramírez, M. R., Mingoarranz, F. J., Carrasco Miral, Ana, Cava, R, Tárrega, R, Ramírez, M. R., Mingoarranz, F. J., and Carrasco Miral, Ana
- Abstract
The effect of irradiation dose (0, 5 and 10 kGy) of vacuum-packaged Iberian dry-cured ham slices from pigs fed on concentrate (CON) or free-range reared (FRG) was studied in relation to TBA-RS, hexanal content and instrumental colour changes. TBA-RS values increased after irradiation in the two sets of hams and the increase was dose-dependent. FRG samples showed higher TBA-RS values than CON samples in all treatments, although differences in the rate of formation of thiobarbituric acid-reactive substances were different in the two types of hams, being higher in CON samples than in FRG ones. Irradiation of dry-cured ham slices significantly increased hexanal contents in both sets of hams. Irradiation produced statistically significant increases in vacuum-packed dry-cured ham slices lightness (L*-value), yellowness (b*-value) and chroma (C*-value). Irradiation resulted in significantly lower hue angle (h°) values and higher a*-values in both sets of hams indicating a redder colour of irradiated samples than non-irradiated, and these changes were greater in FRG samples than in CON samples. Differences in composition characteristics of raw material could play an important role in the irradiation-induced changes on colour and lipid oxidation of vacuum-packaged dry-cured ham slices. © 2004 Elsevier Ltd. All rights reserved.
- Published
- 2005
16. Valor pronóstico de la AFP en portadores crónicos del AgHBs con síndrome de Down
- Author
-
Carrascosa, Diana, Casado Moragón, Ángela, Ramírez, M. V., and Sáez, Julia
- Subjects
education - Published
- 1995
17. The prognostic value of alpha-fetoprotein (AFP) in hepatocellular cancer in chronic carriers of HBsAg and positive HBeAg
- Author
-
Carrascosa, Diana, Casado Moragón, Ángela, Ramírez, M. V., Sáez, Julia, Carrascosa, Diana, Casado Moragón, Ángela, Ramírez, M. V., and Sáez, Julia
- Published
- 1996
18. Superoxide dismutase and catalase blood levels in patients with malignant diseases
- Author
-
Comunidad de Madrid, Casado Moragón, Ángela, Torre, R. de la, López-Fernández, M.E., Carrascosa, Diana, Casado, María Concepción, Ramírez, M. V., Comunidad de Madrid, Casado Moragón, Ángela, Torre, R. de la, López-Fernández, M.E., Carrascosa, Diana, Casado, María Concepción, and Ramírez, M. V.
- Abstract
Superoxide dismutase (SOD) and catalase (CAT) activities have been measured in blood from male and female patients of different ages with several types of cancer, in order to examine the relationship among cancer and the two free radical detoxificant enzymes. SOD activity in patients with cancer was found not to be significantly different from the SOD activity observed in the normal population. CAT activity was lower in patients with cancer, especially in lymphomas, when compared with CAT activity in the normal population.
- Published
- 1995
19. Prognostic value of AFP in chronic carriers of HBsAg with Down's syndrome
- Author
-
Carrascosa, Diana, Casado Moragón, Ángela, Ramírez, M. V., Sáez, Julia, Carrascosa, Diana, Casado Moragón, Ángela, Ramírez, M. V., and Sáez, Julia
- Published
- 1995
20. Predicted regulatory SNPs reveal potential drug targets and novel companion diagnostics in psoriasis
- Author
-
Andrea Virginia Ruiz Ramírez, M. Sc., Adolfo Flores-Saiffe Farías, M. Sc., Rocío del Carmen Chávez Álvarez, Ph. D., and Ernesto Prado Montes de Oca, M.Sc., Ph.D.
- Subjects
Psoriasis ,Bioinformatics ,Gene expression regulation ,Single nucleotide polymorphism ,Regulatory SNPs ,Transcription factors ,Immunologic diseases. Allergy ,RC581-607 - Abstract
Psoriasis is an autoimmune disease associated with interleukins, their receptors, key transcription factors and more recently, antimicrobial peptides (AMPs). Cathelicidin LL-37 is an AMP proposed to play a fundamental role in psoriasis etiology. With our proprietary software SNPClinic v.1.0, we analyzed 203 common SNPs (MAF frequency > 1%) in proximal promoters of 22 genes associated with psoriasis. These include nine genes which protein products are classic drug targets for psoriasis (TNF, IL17A, IL17B, IL17C, IL17F, IL17RA, IL12A, IL12B and IL23A). SNPClinic predictions were run with DNAseI-HUP chromatin accessibility data in eight psoriasis/epithelia-relevant cell lines from ENCODE including keratinocytes (NHEK), TH1 and TH17 lymphocytes. Results were ranked quantitatively by transcriptional relevance according to our novel Functional Impact Factor (FIF) parameter. We found six rSNPs in five genes (CAMP/cathelicidin, S100A7/psoriasin, IL17C, IL17RA and TNF) and each was confirmed as true rSNP in at least one public eQTL database including GTEx portal and ENCODE (Phase 3). Predicted regulatory SNPs in cathelicidin, IL17C and IL17RA genes may explain hyperproliferation of keratinocytes. Predicted rSNPs in psoriasin, IL17C and cathelicidin may contribute to activation and polarization of lymphocytes. Predicted rSNPs in TNF gene are concordant with the epithelium-mesenchymal transition. In spite that these results must be validated in vitro and in vivo with a functional genomics approach, we propose FOXP2, RUNX2, NR2F1, ELF1 and HESX1 transcription factors (those with the highest FIF on each gene) as novel drug targets for psoriasis. Furthermore, four out of six rSNPs uncovered by SNPClinic v.1.0 software, could also be validated in the clinic as companion diagnostics/pharmacogenetics assays for psoriasis prescribed drugs that block TNF-α (e.g. Etanercept), IL-17 (e.g. Secukinumab) and IL-17 receptor (Brodalumab).
- Published
- 2021
- Full Text
- View/download PDF
21. Novel bioactive materials: silica aerogel and hybrid silica aerogel/pseudowollastonite
- Author
-
Reséndiz-Hernández, P. J., Cortés-Hernández, D. A., Saldívar-Ramírez, M. M. G., Acuña-Gutiérrez, I. O., Flores-Valdés, A., Torres-Rincón, S., and Méndez-Nonell, J.
- Subjects
Composites ,Biomaterials ,Bioceramics ,Silica aerogel ,Bioactivity ,Materiales compuestos ,Biomateriales ,Biocerámicas ,Aerogel de sílice ,Bioactividad ,Clay industries. Ceramics. Glass ,TP785-869 - Abstract
Silica aerogel and hybrid silica aerogel/pseudowollastonite materials were synthesized by controlled hydrolysis of tetraethoxysilane (TEOS) using also methanol (MeOH) and pseudowollastonite particles. The gels obtained were dried using a novel process based on an ambient pressure drying. Hexane and hexamethyl-disilazane (HMDZ) were the solvents used to chemically modify the surface. In order to assess bioactivity, aerogels, without and with pseudowollastonite particles, were immersed in simulated body fluid (SBF) for 7 and 14 days. The hybrid silica aerogel/pseudowollastonite showed a higher bioactivity than that observed for the single silica aerogel. However, as in both cases a lower bioactivity was observed, a biomimetic method was also used to improve it. In this particular method, samples of both materials were immersed in SBF for 7 days followed by their immersion in a more concentrated solution (1.5 SBF) for 14 days. A thick and homogeneous bonelike apatite layer was formed on the biomimetically treated materials. Thus, bioactivity was successfully improved even on the aerogel with no pseudowollastonite particles. As expected, the hybrid silica aerogel/pseudowollastonite particles showed a higher bioactivity.Se sintetizaron aerogel de sílice y aerogel híbrido de sílice/partículas de pseudowollastonita por hidrólisis controlada de tetraetoxisilano (TEOS) usando metanol (MeOH) y partículas de pseudowollastonita. Los geles obtenidos se secaron utilizando un novedoso proceso basado en una presión de secado ambiental. Hexano y hexametil-disilazano fueron los solventes usados para modificar químicamente la superficie. Para evaluar la bioactividad, los aerogeles con y sin partículas de pseudowollastonita se sumergieron en un fluido fisiológico simulado (SBF) por 7 y 14 días. El aerogel híbrido de sílice/partículas de pseudowollastonita mostró más alta bioactividad que la observada por el aerogel solo. Sin embargo, en ambos casos, se observó una baja bioactividad, por lo que se utilizó un método biomimético para mejorarla. En este método particular, muestras de ambos materiales se sumergieron en SBF por 7 días seguido de su inmersión en una solución más concentrada (1.5 SBF) por 14 días. Se formó una capa gruesa y homogénea de apatita sobre los materiales tratados biomiméticamente. Por lo tanto, la bioactividad fue mejorada con éxito incluso en el aerogel sin partículas de pseudowollastonita. Como se esperaba, el aerogel híbrido de sílice con partículas de pseudowollastonita mostró la más alta bioactividad.
- Published
- 2014
- Full Text
- View/download PDF
22. Degradación y recuperación de varistores de ZnO
- Author
-
Ramírez, M. A., Bueno, P. R., Valera, J. A., and Márquez, M. A.
- Subjects
Varistors ,thermal treatments ,electrical properties ,degradation ,Varistores ,tratamientos térmicos ,propiedades eléctricas ,degradación ,Clay industries. Ceramics. Glass ,TP785-869 - Abstract
In the present work it was studied the main aspect that influences on degradation and physical-chemical properties at grainboundary region of metal oxide varistors and its consequences on microstructure and nonohmic electric properties. Based on the comprehension of the degradation aspects it was proposed some methodologies to recover the varistors nonohmic properties after being failed with long (2000 μs) and short current pulses (8/20 μs). Our analysis shown that one of the cause of degradation process is related to the lowering of oxygen species amount at grain-boundary region. Therefore, it is possible to re-promote oxygen enrichment of such regions by specific thermal treatments in rich oxygen atmospheres (the best condition found in the present work was temperatures around 900°C for 2 h at an oxygen flux of 15 l/h). The proposed nonohmic properties recovering procedure appear to be valid for all kind metal oxide varistors studied and is very important from technological point of view.En este trabajo se estudia el fenómeno de la degradación eléctrica en varistores basados en ZnO y los factores físico-químicos que influyen en ella, así como su efecto sobre la microestructura y propiedades eléctricas. Con la comprensión de los fenómenos de degradación se proponen metolodogías para recuperar varistores después de fallados con pulsos de corriente de larga (2000 μs) y corta duración (8/20 μs). Los análisis mostraron que una de las causas de degradación es la pérdida de especies de oxígeno en el borde de grano, permitiendo implementar un tratamiento térmico posterior en atmósfera enriquecida de oxígeno para recuperar las propiedades del varistor (temperatura de 900°C por dos horas y 15 l/h de flujo de oxígeno, fue la mejor condición). El procedimiento de recuperación propuesto es válido para todos los sistemas varistores con base en óxido metálico, sean comerciales o no y es de gran interés tecnológico, pues torna viable el reciclaje de una gran cantidad de piezas cerámicas que actualmente son descartadas sin ningún uso.
- Published
- 2006
23. Abandono precoz y retención en servicios ambulatorios de drogodependencias: análisis transversal comparativo de factores que aumentan o disminuyen la adherencia
- Author
-
Xavier Carbonell, Marissa Ramírez, Cristina Giralt, Oriol Turró, Fran Calvo, Jordi Costa, Ramón Valero, [Calvo F] Centre d'Atenció i Seguiment a les Drogodependències, Xarxa de Salut Mental i Addiccions, Institut d’Assistència Sanitària (IAS), Girona, Spain. Facultat de Psicologia, Ciències de l’Educació i de l’Esport (FPCEE), Universitat Ramon Llull, Barcelona, Spain. [Carbonell X] Facultat de Psicologia, Ciències de l’Educació i de l’Esport (FPCEE), Universitat Ramon Llull, Barcelona, Spain. [Valero R, Costa J,Giralt C, Ramírez M] Centre d'Atenció i Seguiment a les Drogodependències, Xarxa de Salut Mental i Addiccions, Institut d’Assistència Sanitària (IAS), Girona, Spain. [Turró O] Institut d'Assistència Sanitària (IAS), Grup de recerca en Envelliment, Discapacitat i Salut, Institut d'Investigació Biomèdica de Girona (IdIBGi), Salt, Spain, and Institut d'Assistència Sanitària
- Subjects
Substance abuse ,Adult ,Male ,Abandono de tratamiento ,Patient Dropouts ,Substance-Related Disorders ,conducta y mecanismos de la conducta::actitud::actitud ante la salud::cumplimiento y adherencia al tratamiento [PSIQUIATRÍA Y PSICOLOGÍA] ,calidad, acceso y evaluación de la atención sanitaria::calidad de la atención sanitaria::mecanismos de evaluación de la atención sanitaria::características de los estudios epidemiológicos::estudios epidemiológicos::estudios transversales [ATENCIÓN DE SALUD] ,030508 substance abuse ,Tratamiento ambulatorio ,Pacients - Cooperació ,Treatment drop-out ,Ambulatory Care Facilities ,Salud mental ,03 medical and health sciences ,Appointments and Schedules ,0302 clinical medicine ,Sex Factors ,Drogodependencias ,Risk Factors ,Behavior and Behavior Mechanisms::Attitude::Attitude to Health::Treatment Adherence and Compliance [PSYCHIATRY AND PSYCHOLOGY] ,Adherencia al tratamiento ,Treatment adherence ,Humans ,030212 general & internal medicine ,instalaciones, servicios y personal de asistencia sanitaria::centros sanitarios::centros de atención ambulatoria::centros comunitarios de salud::centros de tratamiento de abuso de sustancias [ATENCIÓN DE SALUD] ,Adherència ,lcsh:R5-920 ,Health Care Quality, Access, and Evaluation::Quality of Health Care::Health Care Evaluation Mechanisms::Epidemiologic Study Characteristics::Epidemiologic Studies::Cross-Sectional Studies [HEALTH CARE] ,Ambulatory care ,Age Factors ,General Medicine ,Drogoaddictes - Rehabilitació ,Originales ,Abuso de drogas ,Drug dependence ,Cross-Sectional Studies ,Logistic Models ,Spain ,Patient Compliance ,Mental health ,Female ,Substance Abuse Treatment Centers ,Health Care Facilities, Manpower, and Services::Health Facilities::Ambulatory Care Facilities::Community Health Centers::Substance Abuse Treatment Centers [HEALTH CARE] ,0305 other medical science ,Family Practice ,lcsh:Medicine (General) - Abstract
Resumen: Objetivo: El objetivo de este estudio es definir los factores de riesgo asociados al cese temprano en un centro ambulatorio. Diseño: Transversal y observacional. Emplazamiento: Centros públicos de drogodependencias de la provincia de Girona. Participantes: La muestra estuvo conformada por 264 participantes, y el 34,8% de los participantes abandonaron el proceso antes de 2 meses después de iniciar la terapia (n = 92). Procedimiento: Se compararon las variables clínicas y sociodemográficas de la historia clínica entre los participantes con/sin adherencia. Mediciones principales: Se utilizó la t de Student para la comparación de medias y la ji cuadrado para el análisis de variables cualitativas. Se ajustó un modelo de regresión logística binaria con la variable dependiente adherencia. Resultados: Los resultados indican que acudir a las citas sin compañía (OR = 3,13), ser mujer (OR = 2,44), presentar problemas con la cocaína (OR = 1,14) y ser más joven (OR = 0,89) son los factores que incrementan el riesgo de abandono temprano, mientras que acudir al servicio derivado de un centro básico de salud lo reduce (OR = 0,28). Conclusiones: Se concluye que se debe atender especialmente a la familia del paciente y a mujeres y jóvenes, y que la adecuada coordinación entre los servicios especializados y los de base aumenta la adherencia al tratamiento de los consumidores de drogas. Abstract: Aim: The aim of this study is to define the risk factors associated with early discharge in out-patients clinics. Design: Cross-sectional and observational study. Setting: Substance abuse clinics in Girona (Catalonia, Spain). Participants: A total of 264 individuals were included in the sample, and 34.8% of them abandoned the process within two months of starting the therapy (n = 92). Procedure: Clinical and socio-demographic variables of the clinical history were compared between participants with/without adherence. Main measurements: The Student t test was used to measure the comparison, and the chi-squared test was used for the analysis of qualitative variables. A binary logistic regression model was adjusted, with adherence as the dependent variable. Results: The results indicated that attending the appointments unaccompanied (OR = 3.13), being female (OR = 2.44), having cocaine related issues (OR = 1.14), and being younger (OR = 0.89) are the factors which increase the risk early abandonment. Contrarily, being referred to specialists from a Primary Health Centre reduces the risk (OR = 0.28). Conclusions: It is concluded that special attention must be devoted to the patients’ families, women, and young patients. Moreover, the appropriate coordination between specialist services and basic services increases adherence to treatment among drug users. Palabras clave: Drogodependencias, Salud mental, Adherencia al tratamiento, Abandono de tratamiento, Abuso de drogas, Tratamiento ambulatorio, Keywords: Drug dependence, Mental health, Treatment adherence, Treatment drop-out, Substance abuse, Ambulatory care
- Published
- 2017
24. Haematopoietic gene therapy of non-conditioned patients with Fanconi anaemia-A: results from open-label phase 1/2 (FANCOLEN-1) and long-term clinical trials.
- Author
-
Río P, Zubicaray J, Navarro S, Gálvez E, Sánchez-Domínguez R, Nicoletti E, Sebastián E, Rothe M, Pujol R, Bogliolo M, John-Neek P, Bastone AL, Schambach A, Wang W, Schmidt M, Larcher L, Segovia JC, Yáñez RM, Alberquilla O, Díez B, Fernández-García M, García-García L, Ramírez M, Galy A, Lefrere F, Cavazzana M, Leblanc T, García de Andoin N, López-Almaraz R, Catalá A, Barquinero J, Rodríguez-Perales S, Rao G, Surrallés J, Soulier J, Díaz-de-Heredia C, Schwartz JD, Sevilla J, and Bueren JA
- Abstract
Background: Allogeneic haematopoietic stem-cell transplantation is the standard treatment for bone marrow failure (BMF) in patients with Fanconi anaemia, but transplantation-associated complications such as an increased incidence of subsequent cancer are frequent. The aim of this study was to evaluate the safety and efficacy of the infusion of autologous gene-corrected haematopoietic stem cells as an alternative therapy for these patients., Methods: This was an open-label, investigator-initiated phase 1/2 clinical trial (FANCOLEN-1) and long-term follow-up trial (up to 7 years post-treatment) in Spain. Mobilised peripheral blood (PB) CD34
+ cells from nine patients with Fanconi anaemia-A in the early stages of BMF were transduced with a therapeutic FANCA-encoding lentiviral vector and re-infused without any cytotoxic conditioning treatment. The primary efficacy endpoint of FANCOLEN-1 was the engraftment of transduced cells, as defined by the detection of at least 0·1 therapeutic vector copies per nucleated cell of patient bone marrow (BM) or PB at the second year post-infusion, without this percentage having declined substantially over the previous year. The safety coprimary endpoint was adverse events during the 3 years after infusion. The completed open-label phase 1/2 and the ongoing long-term clinical trials are registered with ClinicalTrials.gov, NCT03157804; EudraCT, 2011-006100-12; and NCT04437771, respectively., Findings: There were eight evaluable treated patients with Fanconi anaemia-A. Patients were recruited between Jan 7, 2016 and April 3, 2019. The primary endpoint was met in five of the eight evaluable patients (62·50%). The median number of therapeutic vector copies per nucleated cell of patient BM and PB at the second year post-infusion was 0·18 (IQR 0·01-0·20) and 0·06 (0·01-0·19), respectively. No genotoxic events related to the gene therapy were observed. Most treatment-emergent adverse events (TEAEs) were non-serious and assessed as not related to therapeutic FANCA-encoding lentiviral vector. Nine serious adverse events (grade 3-4) were reported in six patients, one was considered related to medicinal product infusion, and all resolved without sequelae. Cytopenias and viral infections (common childhood illnesses) were the most frequently reported TEAEs., Interpretation: These results show for the first time that haematopoietic gene therapy without genotoxic conditioning enables sustained engraftment and reversal of BMF progression in patients with Fanconi anaemia., Funding: European Commission, Instituto de Salud Carlos III, and Rocket Pharmaceuticals., Competing Interests: Declaration of interests PR: has received honoraria as consultant and holds stock options and royalties for licences to Rocket Pharmaceuticals. SN: has received honoraria as consultant and holds stock options and royalties for licences to Rocket Pharmaceuticals. EN: employee of Rocket Pharmaceuticals and owns Rocket Pharmaceuticals equity and equity options. JCS: has received honoraria as consultant and holds stock options and royalties for licences to Rocket Pharmaceuticals. JSu: has received service honoraria from Rocket Pharmaceuticals. GR: employee of Rocket Pharmaceuticals and owns Rocket Pharmaceuticals equity and equity options. JSo: has received honoraria as consultant from Rocket Pharmaceuticals. JDS: employee and officer of Rocket Pharmaceuticals and owns Rocket Pharmaceuticals equity and equity options. JSe: has received support for attending meetings and honoraria as consultant, as member of advisory boards, and holds stock options and royalties for licences to Rocket Pharmaceuticals. JAB: has received honoraria as consultant and holds stock options and royalties for licences to Rocket Pharmaceuticals. AdC: has received honoraria as consultant and holds stock options and royalties for licences to Rocket Pharmaceuticals. The institutions of PR, JZ, SN, AS, PJ-N, ALB, MRa, JCS, JSu, JSe, JAB, and AdC have received funding for research on gene therapy from Rocket Pharmaceuticals. All other authors declare no competing interests., (Copyright © 2024 Elsevier Ltd. All rights reserved, including those for text and data mining, AI training, and similar technologies.)- Published
- 2024
- Full Text
- View/download PDF
25. Do classic psychedelics increase the risk of seizures? A scoping review.
- Author
-
Soto-Angona Ó, Fortea A, Fortea L, Martínez-Ramírez M, Santamarina E, López FJG, Knudsen GM, and Ona G
- Subjects
- Humans, Animals, Hallucinogens adverse effects, Seizures chemically induced, Seizures drug therapy
- Abstract
Seizures are a concerning adverse event frequently associated with the use of psychedelics, and hence, studies involving these substances tend to exclude patients with past history of epilepsy. This is especially relevant because epileptic seizures are markedly increased in the population suffering from mental disorders, and psychedelic assisted therapy is being researched as a promising treatment for several of them. To determine the extent of the current literature on the relationship between classic psychedelics and seizures, a scoping review was performed using the PRISMA-ScR (Preferred Reporting Items for Systematic Reviews and Meta-Analyses extension for Scoping Reviews). The search was conducted in PubMed, Web of Science, Google scholar, LILACS and Scielo, and both animal and human models were included. A total of 16 publications on humans, and 11 on animals, were found. The results are heterogeneous, but globally suggest that psychedelics may not increase the risk of seizures in healthy individuals or animals in the absence of other drugs. However, concomitant use of other substances or drugs, such as kambo or lithium, could increase the risk of seizures. Additionally, these conclusions are drawn from data lacking sufficient external validity, so they should be interpreted with caution. Future paths for research and a summary on possible neurobiological underpinnings that might clarify the relationship between classical psychedelics and seizures are also provided., Competing Interests: Declaration of competing interest During the past three years, O.S.A has received travel awards (air tickets + hotel) for taking part in annual psychiatric meetings from Lundbeck and Janssen-Cilag. He also has acted as a speaker for Lundbeck, and as a consultant for MAPS Foundation. None of them are related to this publication. FJGL has received honararia and speaking fees from UCB Pharma, Angellini and Eisai, none of them related to the topic of the present manuscript. AF has received educational and travel support from Janssen-Cilag, Lundbeck and Rovi, and speaking fees from Abbott, unrelated to this study. The other authors report no conflicts of interest., (Copyright © 2024 Elsevier B.V. and ECNP. All rights reserved.)
- Published
- 2024
- Full Text
- View/download PDF
26. Assessment of Cognitive Performance in Bipolar Disorder Type I Patients and Their Unaffected Offspring.
- Author
-
Castaño Ramírez M, Lemos Buitrago R, Castro Navarro JC, Julio de La Rosa A, Valderrama Sánchez A, and Agúdelo Hernández F
- Subjects
- Humans, Female, Male, Adult, Case-Control Studies, Cognition, Middle Aged, Young Adult, Memory, Short-Term physiology, Attention, Bipolar Disorder physiopathology, Bipolar Disorder diagnosis, Bipolar Disorder psychology, Neuropsychological Tests, Executive Function, Cognitive Dysfunction etiology, Cognitive Dysfunction diagnosis, Cognitive Dysfunction physiopathology
- Abstract
Patients with bipolar disorder type I (BP-I) often present with impairments in cognitive function. Offspring unaffected by the disorder can also present with cognitive dysfunction. The objective of this study was to compare the cognitive function of BP-I patients, their unaffected offspring (UO) and healthy control subjects (HC)., Methods: Verbal memory, working memory index, processing speed, attention, verbal and phonological fluency and executive function were evaluated through the application of a neuropsychological battery to three groups made up of BP-I patients that attended the Bipolar Disorder Outpatient Clinic of Clínica San Juan de Dios de Manizales [San Juan de Dios de Manizales Clinic] (n=30), UO (n=32) and control group (n=31). The UO group and the control group were matched by gender, age and level of education., Results: Major differences between the three groups were found in the measures of cognitive functions (except in semantic fluency). The HC group showed better cognitive performance in all the functions. Post-hoc analysis showed similar results in the cognitive performance between BP-I and UO except in verbal learning and executive function tasks where the results were better in UO. A better performance in the control group was found, compared to the UO group, in executive function, attention, working memory, and semantic fluency and phonological areas., Conclusions: These results indicate that the offspring of patients with BP-I present with cognitive impairments without suffering from the disorder. This suggests that cognitive dysfunction presents without diagnosis and supports the hypothesis that it can correspond to a BP-I endophenotype., (Copyright © 2022 Asociación Colombiana de Psiquiatría. Published by Elsevier España, S.L.U. All rights reserved.)
- Published
- 2024
- Full Text
- View/download PDF
27. ADAMTS13 recovery in acute thrombotic thrombocytopenic purpura after caplacizumab therapy.
- Author
-
Mingot-Castellano ME, García-Candel F, Martínez-Nieto J, García-Arroba J, de la Rubia-Comos J, Gómez-Seguí I, Paciello-Coronel ML, Valcárcel-Ferreiras D, Jiménez M, Cid J, Lozano M, García-Gala JM, Angós-Vazquez S, Vara-Pampliega M, Guerra-Domínguez L, Ávila-Idrobo LF, Oliva-Hernandez A, Zalba-Marcos S, Tallón-Ruiz I, Ortega-Sánchez S, Goterris-Viciedo R, Moreno-Jiménez G, Domínguez-Acosta L, Araiz-Ramírez M, Hernández-Mateos L, Flores-Ballesteros E, Del Río-Garma J, and Pascual-Izquierdo C
- Subjects
- Humans, Male, Female, Adult, Middle Aged, Platelet Count, Acute Disease, Treatment Outcome, Aged, ADAMTS13 Protein blood, ADAMTS13 Protein metabolism, Purpura, Thrombotic Thrombocytopenic drug therapy, Purpura, Thrombotic Thrombocytopenic therapy, Single-Domain Antibodies therapeutic use, Plasma Exchange
- Abstract
Abstract: Caplacizumab prevents the interaction between von Willebrand factor and platelets and is used to treat immune thrombotic thrombocytopenic purpura (iTTP). Its administration has been associated with a delay in ADAMTS13 activity restoration after plasma exchange (PEX) suspension. We analyzed the outcomes of 113 iTTP episodes, 75 of which were treated with caplacizumab, in 108 patients from the Spanish Registry of Thrombotic Thrombocytopenic Purpura. Caplacizumab shortened the time to platelet count normalization and reduced PEX requirement, exacerbations, and relapses. There was no difference in the time to achieve ADAMTS13 activity ≥20% after PEX end between caplacizumab-treated and nontreated episodes (median [interquartile range], 14.5 [7.7-27.2] vs 13.0 [8.0-29.0] days, P = .653). However, considering the 36 episodes in which caplacizumab was started ≤3 days after iTTP diagnosis, the time for ADAMTS13 restoration from PEX end was higher than in those episodes in which caplacizumab was started >3 days after iTTP diagnosis (20.0 [12.0-43.0] vs 11.0 [3.5-20.0] days, P = .003) or than in non-caplacizumab-treated episodes (P = .033). This finding could be related to a significantly shorter duration of PEX in early caplacizumab-treated episodes than in late caplacizumab-treated episodes (5.5 [4.0-9.0] vs 15.0 [11.0-21.5] days, P < .001) or non-caplacizumab-treated episodes (11.0 [6.0-26.0] days, P < .001). There were no differences in time to ADAMTS-13 restoration from PEX start (28.0 [17.2-47.5], 27.0 [19.0-37.5] and 29.5 [15.2-45.0] days in early caplacizumab-treated, late caplacizumab-treated and non-caplacizumab-treated episodes). Early administered caplacizumab does not prevent the requirement for immunosuppression but has beneficial effects by shortening PEX requirement without major safety concerns., (© 2024 American Society of Hematology. Published by Elsevier Inc. All rights are reserved, including those for text and data mining, AI training, and similar technologies.)
- Published
- 2024
- Full Text
- View/download PDF
28. Black Vulture (Coragyps atratus) feathers as bioindicators of exposure to metals and metalloids contamination in urban, semi-urban, and rural areas from Campeche state, Mexico.
- Author
-
Borges-Ramírez M, Escalona-Segura G, Huerta-Lwanga E, Iñigo-Elias E, and Rendón-von Osten J
- Subjects
- Humans, Animals, Environmental Biomarkers, Ecosystem, Cadmium, Feathers, Mexico, Lead, Environmental Monitoring, Birds, Metalloids analysis, Mercury, Falconiformes, Metals, Heavy analysis
- Abstract
Landfills are sources of soil, water, and air pollution due to the release of toxic compounds such as metals and metalloids. In both tropical and temperate environments, scavenger birds such as the Black Vulture (Coragyps atratus) that have learned to use these sites as a feeding area are probably exposed to metals, metalloids and other "persistent bioaccumulative toxic substances (PBTs)" released in open dumpsite (OD) and sanitary landfill (SL). The objective of this study is to evaluate the presence and distribution of toxic metals (Al, Sn, Hg, Cu, Pb, Cd, Cr) and As in OD and SL from urban, semi-urban and rural localities in Campeche, México, using molting feathers of C. atratus as bioindicators. A total of 125 Black Vulture primary and secondary wing feathers were collected from OD and SL. Metals were determined by voltammetry through acid digestion. The highest levels of metals occurred in landfills in urban, semi-urban, and rural localities. The elements with the highest concentrations were Al, with an average of 35.67 ± 33.51 μg g
-1 from rural environments, and As, with 16.20 ± 30.06 μg g-1 from the urban localities. Mercury was the only element that had a very homogeneous distribution between the three environments we studied. In general, Pb, Hg, Cu and Cd were the elements that presented the lowest concentrations with 0.32 ± 0.35, 0.16 ± 0.22, 0.14 ± 0.31 and 0.06 ± 0.10 μg g-1 , respectively regardless of any particular location or environment. Black Vultures from dumpsites are good bioindicators of what humans consume in urban, semi-urban, and rural environments. However, the conservation of vultures is of great importance since these scavenger birds perform ecosystem services by feeding on decomposing organic material., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier Inc. All rights reserved.)- Published
- 2024
- Full Text
- View/download PDF
29. Biodesulfurization of landfill biogas by a pilot-scale bioscrubber: Operational limits and microbial analysis.
- Author
-
Torres-Herrera S, Palomares-Cortés J, González-Cortés JJ, Cubides-Páez DF, Gamisans X, Cantero D, and Ramírez M
- Subjects
- Biofuels, Sulfur, Waste Disposal Facilities, Bioreactors, Hydrogen Sulfide
- Abstract
Biogas serves as a crucial renewable energy vector to ensure a more sustainable energy future. However, the presence of hydrogen sulfide (H
2 S) limits its application in various sectors, emphasizing the importance of effective H2 S removal techniques for maximizing its potential. In the present study, the limits of a pilot-scale bioscrubber for biogas desulfurization was study in a real scenario. An increase in the superficial liquid velocity resulted in significant improvements in the H2 S removal efficiency, increasing from 76 ± 8% (elimination capacity of 6.2 ± 0.5 gS-H2 S m- 3 h-1 S m2 S m- ) as the superficial liquid velocity increased from 50 ± 3 m h3 to 200 ± 8 m h-1 ) as the superficial liquid velocity increased from 50 ± 3 m h-1 of 161.4 ± 0.5 m h-1 . A USL of 161.4 ± 0.5 m h-1 was able to achieve outlet H2 S concentrations as low as 3 ± 1 ppmv (H2 S m2 S oxidation reducing the nitrate demand. The maximum EC reached throughout the operation was 50.8 ± 0.6 gS-H2 S m- 3 h-1 (H2 S removal efficiency of 96 ± 1%) and a sulfur production of 60%. Studies in batch flocculation experiments showed sulfur removal rates up to 97.6 ± 0.9% with a cationic flocculant dose of 75 mg L-1 . Microbial analysis revealed that the predominant genus with sulfo-oxidant capacity during periods of low H2 S inlet load was Thioalkalispira-sulfurivermis (61-69%), while in periods of higher H2 S inlet load, family Arcobacteraceae was the most prevalent (11%)., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 The Authors. Published by Elsevier Inc. All rights reserved.)- Published
- 2024
- Full Text
- View/download PDF
30. Risk assessment of pesticides used in the eastern Avocado Belt of Michoacan, Mexico: A survey and water monitoring approach.
- Author
-
Merlo-Reyes A, Baduel C, Duwig C, and Ramírez MI
- Subjects
- Humans, Water analysis, Ecosystem, Benomyl analysis, Mexico, Chromatography, Liquid, Tandem Mass Spectrometry, Rivers, Risk Assessment, Surveys and Questionnaires, Environmental Monitoring methods, Pesticides analysis, Persea, Water Pollutants, Chemical analysis, Neonicotinoids, Benzimidazoles, Carbamates, Nitro Compounds
- Abstract
Pesticides use raises concerns regarding environmental sustainability, as pesticides are closely linked to the decline of biodiversity and adverse human health outcomes. This study proposed a holistic approach for assessing the potential risks posed by pesticides for human health and the environment in the eastern region of Michoacan, where extensive agricultural lands, especially corn and avocado fields, surround the Monarch Butterfly Biosphere Reserve. We used a combination of qualitative (semi-structured interviews) and quantitative (chemical analysis) data. Fifty-five interviews with smallholder farmers allowed us to identify pesticide types, quantities, frequencies, and application methods. A robust and precise analytical method based on solid-phase extraction and LC-MS/MS was developed and validated to quantify 21 different pesticides in 16 water samples (rivers, wells, runoff areas). We assessed environmental and human health risks based on the pesticides detected in the water samples and reported in the interviews. The interviews revealed the use of 28 active ingredients, including glyphosate (29 % of respondents), imidacloprid (27 %), and benomyl (24 %). The pesticide analysis showed the presence of 13 different pesticides and degradation products in the water samples. The highest concentrations were found for imidacloprid (1195 ngL
-1 ) and carbendazim (a degradation product of benomyl; 932 ngL-1 ), along with the metabolite of pyrethroid insecticides, 3-PBA (494 ngL-1 ). The risk assessment indicates that among the most used pesticides, the fungicide benomyl and carbendazim pose the highest risk to human health and aquatic ecosystems, respectively. This study unveils novel insights on agricultural practices for the avocado, a globally consumed crop that is undergoing rapid production expansion. It calls for the harmonisation of crop protection with environmental responsibility, safeguarding the health of the people involved and the surrounding ecosystems., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2024 Elsevier B.V. All rights reserved.)- Published
- 2024
- Full Text
- View/download PDF
31. 3D environment controls H3K4 methylation and the mechanical response of the nucleus in acute lymphoblastic leukemia cells.
- Author
-
González-Novo R, de Lope-Planelles A, Cruz Rodríguez MP, González-Murillo Á, Madrazo E, Acitores D, García de Lacoba M, Ramírez M, and Redondo-Muñoz J
- Subjects
- Child, Humans, Methylation, Histone-Lysine N-Methyltransferase genetics, Histone-Lysine N-Methyltransferase metabolism, Epigenesis, Genetic, Intracellular Signaling Peptides and Proteins genetics, Intracellular Signaling Peptides and Proteins metabolism, Histones metabolism, Precursor Cell Lymphoblastic Leukemia-Lymphoma genetics
- Abstract
Acute lymphoblastic leukemia (ALL) is the most common pediatric cancer, and the infiltration of leukemic cells is critical for disease progression and relapse. Nuclear deformability plays a critical role in cancer cell invasion through confined spaces; however, the direct impact of epigenetic changes on the nuclear deformability of leukemic cells remains unclear. Here, we characterized how 3D collagen matrix conditions induced H3K4 methylation in ALL cell lines and clinical samples. We used specific shRNA and chemical inhibitors to target WDR5 (a core subunit involved in H3K4 methylation) and determined that targeting WDR5 reduced the H3K4 methylation induced by the 3D environment and the invasiveness of ALL cells in vitro and in vivo. Intriguingly, targeting WDR5 did not reduce the adhesion or the chemotactic response of leukemia cells, suggesting a different mechanism by which H3K4 methylation might govern ALL cell invasiveness. Finally, we conducted biochemical, and biophysical experiments to determine that 3D environments promoted the alteration of the chromatin, the morphology, and the mechanical behavior of the nucleus in ALL cells. Collectively, our data suggest that 3D environments control an upregulation of H3K4 methylation in ALL cells, and targeting WDR5 might serve as a promising therapeutic target against ALL invasiveness in vivo., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023. Published by Elsevier GmbH.)
- Published
- 2023
- Full Text
- View/download PDF
32. Environmental risk of microplastics in a Mexican coastal lagoon ecosystem: Anthropogenic inputs and its possible human food risk.
- Author
-
Celis-Hernandez O, Ávila E, Rendón-von Osten J, Briceño-Vera EA, Borges-Ramírez MM, Gómez-Ponce AM, and Capparelli VM
- Subjects
- Animals, Humans, Microplastics, Ecosystem, Plastics, Shellfish, Environmental Monitoring methods, Crassostrea, Water Pollutants, Chemical analysis
- Abstract
Coastal lagoons are ecosystems that are considered providers of a variety species of commercial value to the humans. However, they are currently threatened by a variety of anthropogenic-derived impacts, including environmental pollution by microplastics (MPs). For these reasons, it is necessary to identify suitable biomonitors for monitoring MP activities in aquatic environments and for estimating human ingestion of MPs from the consumption of commercial shellfish species. Therefore, our aims were to identify the anthropogenic activities that supply MPs into a coastal lagoon in the southern Gulf of Mexico and their variety; to determine whether oysters (Crassostrea virginica) are suitable biomonitors to perform MPs monitoring activities and to conduct an estimation of how many MPs could a human consume by the ingestion of a commercial portion of oysters harvested in this coastal lagoon. Our results noted that MP concentrations from water and sediment collected in Laguna de Terminos were 210,000 and 11.3 times higher than values reported in other protected areas worldwide. MPs chemical composition revealed that fishing and urban activities supply mainly polyethylene (21.1 %), poly (butadiene) diol (12.6 %) and polyethylene terephthalate (9.5 %). It was also determined that oysters did not reflect the spatial distribution of MPs within the study area and that a human could consume up to 806.1 MPs per 237.1 g serving of an oyster cocktail. Finally, a coastal lagoon polluted with MPs increases the risk of affecting species used for human consumption., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2023 Elsevier B.V. All rights reserved.)
- Published
- 2023
- Full Text
- View/download PDF
33. Effect of dual modification with citric acid combined with ultrasonication on hydrolysis kinetics, morphology and structure of corn starch dispersions.
- Author
-
Chavez-Esquivel G, Cervantes-Cuevas H, and Vera-Ramírez MA
- Subjects
- Hydrolysis, Citric Acid chemistry, Kinetics, Starch chemistry, Zea mays chemistry
- Abstract
Corn starch dispersions (CSD) were hydrolyzed with citric acid and compared with CSD co-treated with citric acid combined with ultrasonication for 1 to 18 days, which are designated as single modification (CSD-SM) and dual modification (CSD-DM), respectively. The logistic functions monitor the dynamics of the hydrolysis advance (%) of the CSD-SM and CSD-DM as a function of time, where the zones most vulnerable to the single-treatment and/or co-treatment of the corn starch granules (CSG) are the amorphous or disordered regions. The characterization results of CSD-DM suggest that the structural changes caused by dual modification affected the morphology, sequence, and microstructure of the CSG. The heterogeneous changes caused by the dual modification changed the configuration of the CSG, generating a kind of destemming of the amorphous lamellae (depolymerization), an increase in the percentage of relative crystallinity of the CSD-DM and an active rearrangement of the intralamellar chains that promoted the relative amount of double helix for 18 days of double modification. The synergistic effect of the dual modification for CSD by the sequential combination of a chemical treatment followed by a physical one improved the hydrolyzed advance by 12 %, the relative crystallinity by 10 %, and the promotion of double helices by 25 % during 18 days of co-treatment., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2022 Elsevier B.V. All rights reserved.)
- Published
- 2022
- Full Text
- View/download PDF
34. Electrochemical and CD-spectroelectrochemical studies of the interaction between BSA and the complex [Cu(Bztpen)] 2+ , (Bztpen = (N-benzyl-N, N', N'-tris (pyridin-2-ylmethyl) ethylenediamine).
- Author
-
Ocampo-Hernández J, de Jesús Gómez-Guzmán J, Cruz-Ramírez M, Rebolledo-Chávez JPF, Mendoza A, Moreno-Esparza R, and Ortiz-Frade L
- Subjects
- Circular Dichroism, Spectrometry, Fluorescence, Copper chemistry, Serum Albumin, Bovine chemistry, Ethylenediamines
- Abstract
In this work we report the electrochemical, spectroscopical and spectro-electrochemical studies of a model complex [Cu
ΙΙ (Bztpen)]2+ , (Bztpen = (N-benzyl-N,N',N'-tris(pyridin-2-ylmethyl)ethylenediamine) in order to propose a methodology to evaluate the interaction of potential metal based anticancer agents during electron transfer processes, with transport proteins such as Bovine Serum Albumin (BSA). It was possible to establish a reversible electron transfer [CuΙΙ (Bztpen)]2+ +1e → [CuΙ (Bztpen)]+ and a weak interaction energy between BSA and [CuΙΙ (Bztpen)] and [CuΙ (Bztpen)] species, with no adsorption of protein over the electrode surface. Circular Dichroism (CD) Spectroelectrochemistry, not reported before, reveals no significant changes in BSA structure during the electron transfer [CuΙΙ (Bztpen)]2+ + 1e → [CuΙ (Bztpen)]+ . CD experiments at variable temperature for BSA denaturalization in the absence and in the presence of [CuΙΙ (Bztpen)]2+ , shown no change in thermodynamic parameters due to low interaction between the transport protein and copper complex., Competing Interests: Declaration of Competing Interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2022 Elsevier Inc. All rights reserved.)- Published
- 2022
- Full Text
- View/download PDF
35. Secretory immunoglobulin A (s-IgA) reactivity to acute psychosocial stress in children and adolescents: The influence of pubertal development and history of maltreatment.
- Author
-
Marques-Feixa L, Castro-Quintas Á, Palma-Gudiel H, Romero S, Morer A, Rapado-Castro M, Martín M, Zorrilla I, Blasco-Fontecilla H, Ramírez M, Mayoral M, Mendez I, San Martín-Gonzalez N, Rodrigo-Yanguas M, Luis Monteserín-García J, and Fañanás L
- Subjects
- Adolescent, Child, Humans, Hydrocortisone, Hypothalamo-Hypophyseal System, Stress, Psychological, Immunoglobulin A, Secretory, Saliva
- Abstract
Background: Mucosal secretory immunoglobulin A (s-IgA) is an antibody protein-complex that plays a crucial role in immune first defense against infection. Although different immune biomarkers have been associated with stress-related psychopathology, s-IgA remains poorly studied, especially in youth., Objectives: The present study investigated how s-IgA behaves in front of acute psychosocial stress in children and adolescents, including possible variability associated with developmental stage and history of childhood maltreatment (CM)., Methods: 94 children and adolescents from 7 to 17 years (54 with a current psychiatric diagnostic and 40 healthy controls) drawn from a larger Spanish study were explored (EPI-Young Stress Project). To assess biological reactivity, participants provided five saliva samples during an acute laboratory-based psychosocial stressor, the Trier Social Stress Test for Children (TSST-C). Samples were assayed for s-IgA, as well as for cortisol. Pubertal development was ascertained by Tanner stage and CM following TASSCV criteria., Results: We observed s-IgA fluctuations throughout the stressor, indicating the validity of TSST-C to stimulate s-IgA secretion (F(4,199) = 6.200, p <.001). Although s-IgA trajectories followed a reactivity and recovery pattern in adolescents, children exhibited no s-IgA response when faced with stress (F(4,197) = 3.406, p =.010). An interaction was found between s-IgA and CM (F(4,203) = 2.643, p =.035). Interestingly, an interaction between developmental stage, CM history and s-IgA reactivity was identified (F(12,343) = 2.036, p =.017); while children non-exposed to maltreatment exhibited no s-IgA changes to acute stress, children with a history of CM showed a similar response to adolescents, increasing their s-IgA levels after the psychosocial stressor., Conclusion: Acute psychosocial stress stimulates s-IgA secretion, but only after puberty. However, children with a history of maltreatment exhibited a response resembling that of adolescents, suggesting an early maturation of the immune system. Further studies are needed to clarify the validity of s-IgA as an acute stress biomarker, including additional measures during stress exposure., (Copyright © 2022 The Author(s). Published by Elsevier Inc. All rights reserved.)
- Published
- 2022
- Full Text
- View/download PDF
36. High BMP4 expression in low/intermediate risk BCP-ALL identifies children with poor outcomes.
- Author
-
Fernández-Sevilla LM, Valencia J, Ortiz-Sánchez P, Fraile-Ramos A, Zuluaga P, Jiménez E, Sacedón R, Martínez-Sánchez MV, Jazbec J, Debeljak M, Fedders B, Stanulla M, Schewe D, Cario G, Minguela A, Ramírez M, Varas A, and Vicente Á
- Subjects
- Animals, Bone Morphogenetic Protein 4 genetics, Child, Endothelial Cells metabolism, Humans, Mice, Recurrence, Retrospective Studies, Tumor Microenvironment, Burkitt Lymphoma, Precursor B-Cell Lymphoblastic Leukemia-Lymphoma pathology, Precursor Cell Lymphoblastic Leukemia-Lymphoma pathology
- Abstract
Pediatric B-cell precursor acute lymphoblastic leukemia (BCP-ALL) outcome has improved in the last decades, but leukemic relapses are still one of the main problems of this disease. Bone morphogenetic protein 4 (BMP4) was investigated as a new candidate biomarker with potential prognostic relevance, and its pathogenic role was assessed in the development of disease. A retrospective study was performed with 115 pediatric patients with BCP-ALL, and BMP4 expression was analyzed by quantitative reverse transcription polymerase chain reaction in leukemic blasts at the time of diagnosis. BMP4 mRNA expression levels in the third (upper) quartile were associated with a higher cumulative incidence of relapse as well as a worse 5-year event-free survival and central nervous system (CNS) involvement. Importantly, this association was also evident among children classified as having a nonhigh risk of relapse. A validation cohort of 236 patients with BCP-ALL supported these data. Furthermore, high BMP4 expression promoted engraftment and rapid disease progression in an NSG mouse xenograft model with CNS involvement. Pharmacological blockade of the canonical BMP signaling pathway significantly decreased CNS infiltration and consistently resulted in amelioration of clinical parameters, including neurological score. Mechanistically, BMP4 favored chemoresistance, enhanced adhesion and migration through brain vascular endothelial cells, and promoted a proinflammatory microenvironment and CNS angiogenesis. These data provide evidence that BMP4 expression levels in leukemic cells could be a useful biomarker to identify children with poor outcomes in the low-/intermediate-risk groups of BCP-ALL and that BMP4 could be a new therapeutic target to blockade leukemic CNS disease., (© 2022 by The American Society of Hematology.)
- Published
- 2022
- Full Text
- View/download PDF
37. Development and validation of a sampling and analysis method to determine biogenic sulfur in a desulfurization bioreactor by gas chromatography coupled with a pulsed flame photometric detector (GC-PFPD).
- Author
-
Torres-Herrera S, González-Cortés JJ, Almenglo F, Ramírez M, and Cantero D
- Subjects
- Bioreactors, Chromatography, Gas, Temperature, Photometry, Sulfur
- Abstract
Suspended biomass bioreactors can be operated to remove H
2 S from biogas under anoxic conditions and produce elemental sulfur, the commercial value of which has been demonstrated. In the present paper, a novel methodology comprising the optimization of a determination method performed in a gas chromatograph equipped with a pulsed flame photometric detector (GC-PFPD), combined with a simple preparation based on filtration and extraction with toluene, is proposed. The injector temperature and carrier gas flow rate (QHe ) values were optimized using a response surface methodology based on a face-centred composite central design. This optimization revealed that the optimum conditions were an injector temperature and carrier gas flow rate of 222 °C and 7 mL min-1 , respectively. The chromatographic method shows an analysis time of 48 min, a detection limit of more than 5.9 mg L-1 , a relative standard deviation of less than 3.71%, and a sulfur recovery percentage of more than 98%. These values provide excellent linearity and a reasonable concentration range (10-200 mg L-1 ). Finally, a measurement error of 4.45% was obtained when using the present method in a selectivity test., (Copyright © 2021 The Authors. Published by Elsevier B.V. All rights reserved.)- Published
- 2022
- Full Text
- View/download PDF
38. Effects of substrate temperature on patterns produced by dried droplets of proteins.
- Author
-
Carreón YJP, Ríos-Ramírez M, Vázquez-Vergara P, Salinas-Almaguer S, Cipriano-Urbano I, Briones-Aranda A, Díaz-Hernández O, Escalera Santos GJ, and González-Gutiérrez J
- Subjects
- Humans, Temperature, Proteins, Sodium Chloride
- Abstract
Rapid diagnosis provides better clinical management of patients, helps control possible outbreaks, and increases survival. The study of deposits produced by the evaporation of droplets is a useful tool in the diagnosis of some health problems. With the aim to improve diagnostic time in clinical practice where we use the evaporation of droplets, we explored the effects of substrate temperature on pattern formation of dried droplets in globular protein solutions. Three deposit groups were observed: "functional" patterns (from 25 to 37
∘ C), "transition" patterns (from 44 to 50∘ C), and "eye" patterns (from 58 to 63∘ C). The dried droplets of the first two groups show a ring structure ("coffee-ring") that confines a great diversity of aggregates such as needle-like structures, tiny blade-shape crystals, highly symmetrical crystallization patterns, and amorphous salt aggregates. In contrast, the "eye" patterns are deposits with a large inner aggregate surrounded by a coffee ring, and they can appear from the evaporation of droplets in protein binary mixtures and blood serum. Interestingly, the unfolding proteins correlates with the formation of "eye" patterns. We measured stain diameter, "coffee-ring" thickness, radial density profile, and entropy computed by GLCM-statistics to quantify the structural differences among deposit groups. We found that "functional" patterns are structurally indistinguishable among them, but they are clearly different from elements of the other deposit groups. An exponential decay function describes pattern formation time as a function of substrate temperature, which is independent from protein concentration. Patterns formation at 32∘ C takes place up to 63% less time and preserves the structural characteristics of dried droplets in proteins formed at room temperature. Therefore, we argue that droplet evaporation at this substrate temperature could be an excellent candidate to make a more efficient diagnosis based on droplet evaporation of biofluids., (Copyright © 2021 Elsevier B.V. All rights reserved.)- Published
- 2021
- Full Text
- View/download PDF
39. Detection of Plasmodium falciparum malaria in 1 h using a simplified enzyme-linked immunosorbent assay.
- Author
-
de la Serna E, Arias-Alpízar K, Borgheti-Cardoso LN, Sanchez-Cano A, Sulleiro E, Zarzuela F, Bosch-Nicolau P, Salvador F, Molina I, Ramírez M, Fernàndez-Busquets X, Sánchez-Montalvá A, and Baldrich E
- Subjects
- Animals, Enzyme-Linked Immunosorbent Assay, Female, Humans, Plasmodium falciparum, Sensitivity and Specificity, Malaria diagnosis, Malaria, Falciparum diagnosis
- Abstract
Malaria is a parasitic disease caused by protists of the genus Plasmodium, which are transmitted to humans through the bite of infected female Anopheles mosquitoes. Analytical methodologies and efficient drugs exist for the early detection and treatment of malaria, and yet this disease continues infecting millions of people and claiming several hundred thousand lives each year. One of the reasons behind this failure to control the disease is that the standard method for malaria diagnosis, microscopy, is time-consuming and requires trained personnel. Alternatively, rapid diagnostic tests, which have become common for point-of-care testing thanks to their simplicity of use, tend to be insufficiently sensitive and reliable, and PCR, which is sensitive, is too complex and expensive for massive population screening. In this work, we report a sensitive simplified ELISA for the quantitation of Plasmodium falciparum lactate dehydrogenase (Pf-LDH), which is capable of detecting malaria in 45-60 min. Assay development was founded in the selection of high-performance antibodies, implementation of a poly-horseradish peroxidase (polyHRP) signal amplifier, and optimization of whole-blood sample pre-treatment. The simplified ELISA achieved limits of detection (LOD) and quantification (LOQ) of 0.11 ng mL
-1 and 0.37 ng mL-1 , respectively, in lysed whole blood, and an LOD comparable to that of PCR in Plasmodium in vitro cultures (0.67 and 1.33 parasites μL-1 for ELISA and PCR, respectively). Accordingly, the developed immunoassay represents a simple and effective diagnostic tool for P. falciparum malaria, with a time-to-result of <60 min and sensitivity similar to the reference PCR, but easier to implement in low-resource settings., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2021 Elsevier B.V. All rights reserved.)- Published
- 2021
- Full Text
- View/download PDF
40. Acute-phase glycoprotein profile responses to different oral macronutrient challenges: Influence of sex, functional hyperandrogenism and obesity.
- Author
-
Moncayo S, Insenser M, Martínez-García MÁ, Fuertes-Martín R, Amigó-Grau N, Álvarez-Blasco F, Luque-Ramírez M, Correig-Blanchar X, and Escobar-Morreale HF
- Subjects
- Adolescent, Adult, Dietary Fats administration & dosage, Dietary Proteins administration & dosage, Female, Glucose administration & dosage, Glycosylation, Humans, Male, Young Adult, Acute-Phase Proteins analysis, Hyperandrogenism blood, Nutrients administration & dosage, Obesity blood, Polycystic Ovary Syndrome blood, Postprandial Period physiology
- Abstract
Acute-phase glycoprotein
1 H-NMR spectroscopy profiles serve as surrogate markers of chronic inflammation in metabolic disorders such as obesity, diabetes and polycystic ovary syndrome (PCOS). The latter is associated with increased height-to-width (H/W) ratios of GlycA and GlycB after fasting, but not to glycoprotein areas, regardless of obesity. We studied the responses to separate glucose, lipid and protein oral challenges of five glycoprotein variables (GlycA, GlycB, and GlycF areas and the GlycA and GlycB H/W ratios) in 17 women with PCOS, 17 control women, and 19 healthy men. Glucose and protein ingestion resulted into decreases in all glycoprotein variables, whereas lipid ingestion increased GlycA, GlycF and induced minimal changes in GlycB and GlycB H/W. We found no effects of obesity or group of subjects on postprandial glycoprotein variables regardless of the macronutrient being ingested. However, a statistically significant interaction indicated that obesity blunted the decrease in some of these variables in control women and men, whereas obese women with PCOS showed larger changes when compared with their non-obese counterparts. In conclusion, acute-phase glycoprotein profiles indicate an anti-inflammatory response during postprandial phase that is less pronounced after lipid ingestion, and is counteracted by the chronic inflammatory background associated with obesity and PCOS., (Copyright © 2020 Elsevier Ltd and European Society for Clinical Nutrition and Metabolism. All rights reserved.)- Published
- 2021
- Full Text
- View/download PDF
41. Anoxic biogas biodesulfurization promoting elemental sulfur production in a Continuous Stirred Tank Bioreactor.
- Author
-
González-Cortés JJ, Torres-Herrera S, Almenglo F, Ramírez M, and Cantero D
- Subjects
- Bioreactors, Denitrification, Sulfur, Biofuels, Hydrogen Sulfide
- Abstract
Biological desulfurization of biogas has been extensively studied using biotrickling filters (BTFs). However, the accumulation of elemental sulfur (S°) on the packing material limits the use of this technology. To overcome this issue, the use of a continuous stirred tank bioreactor (CSTBR) under anoxic conditions for biogas desulfurization and S° production is proposed in the present study. The effect of the main parameters (stirring speed, N/S molar ratio, hydraulic residence time (HRT) and gas residence time (GRT)) on the bioreactor performance was studied. Under an inlet load (IL) of 100 g S-H
2 S m-3 h-1 and a GRT of 119 s, the CSTBR optimal operating conditions were 60 rpm, N/S molar ratio of 1.1 and a HRT of 42 h, in which a removal efficiency (RE) and S° production of 98.6 ± 0.4 % and 88 % were obtained, respectively. Under a GRT of 41 s and an IL of 232 g S-H2 S m-3 h-1 the maximum elimination capacity (EC) of 166.0 ± 7.2 g S-H2 S m-3 h-1 (RE = 71.7 ± 3.1 %) was obtained. A proportional-integral feedback control strategy was successfully applied to the bioreactor operated under a stepped variable IL., (Copyright © 2020 Elsevier B.V. All rights reserved.)- Published
- 2021
- Full Text
- View/download PDF
42. Effect of sodium-glucose co-transporter 2 inhibitors on hepatic parameters: A systematic review and meta-analysis of randomized controlled trials.
- Author
-
Simental-Mendía M, Sánchez-García A, Rodríguez-Ramírez M, and Simental-Mendía LE
- Subjects
- Alanine Transaminase blood, Alkaline Phosphatase blood, Aspartate Aminotransferases blood, Diabetes Mellitus, Type 2 drug therapy, Humans, Liver metabolism, Randomized Controlled Trials as Topic, Sodium-Glucose Transporter 2 Inhibitors therapeutic use, gamma-Glutamyltransferase blood, Diabetes Mellitus, Type 2 blood, Liver drug effects, Sodium-Glucose Transporter 2 Inhibitors pharmacology
- Abstract
Previous studies have suggested that sodium-glucose co-transporter-2 (SGLT2) inhibitors may improve hepatic function; however, the evidence is scarce. Hence, we performed a meta-analysis of randomized controlled trials to evaluate the effect of sodium-glucose cotransporter 2 (SGLT2) inhibitors on hepatic parameters. PubMed, Web of Science, Scopus, and Google Scholar databases were searched to identify randomized controlled trials examining the effect of SGLT2 inhibitors on hepatic parameters. Meta-analysis was performed using a random-effects model and sensitivity analysis. Meta-analysis revealed that SGLT2 inhibitors therapy significantly lowered alanine aminotransferase (ALT) (WMD: -4.79 U/L, 95 % CI: -6.10, -3.47, I
2 = 62 %, p < 0.00001), aspartate aminotransferase (AST) (WMD: -2.49 U/L, 95 % CI: -3.30, -1.68, I2 = 54 %, p < 0.00001), alkaline phosphatase (AP) (WMD: -1.13 U/L, 95 % CI: -2.03, -0.22, I2 = 23 %, p = 0.02), and gamma-glutamyl transferase (GGT) (WMD: -7.77 U/L, 95 % CI: -9.33, -6.21, I2 = 5 %, p < 0.00001). Additionally, SGLT2 inhibitors showed a significant increase in bilirubin levels (WMD: 0.64 U/L, 95 % CI: 0.27, 1.00, I2 = 53 %, p < 0.0006. Finally, no significant changes were found on albumin levels (WMD: 0.13 U/L, 95 % CI: -0.06, 0.32, I2 = 53 %, p < 0.0006) after SGLT2 inhibitors treatment. In conclusion, our results suggest that treatment with SGLT2 inhibitors exerts a beneficial effect on liver function tests through decreased ALT, AST, AP, and GGT concentrations., (Copyright © 2020 Elsevier Ltd. All rights reserved.)- Published
- 2021
- Full Text
- View/download PDF
43. Simultaneous removal of ammonium from landfill leachate and hydrogen sulfide from biogas using a novel two-stage oxic-anoxic system.
- Author
-
González-Cortés JJ, Almenglo F, Ramírez M, and Cantero D
- Subjects
- Biofuels, Bioreactors, Denitrification, Nitrogen, Ammonium Compounds, Hydrogen Sulfide, Water Pollutants, Chemical
- Abstract
Anoxic biodesulfurization has been achieved in several bioreactor systems that have shown robustness and high elimination capacities (ECs). However, the high operating costs of this technology, which are mainly caused by the high requirements of nitrite or nitrate, make its full-scale application difficult. In the present study, the use of biologically produced nitrate/nitrite by nitrification of two different ammonium substrates, namely synthetic medium and landfill leachate, is proposed as a novel alternative. The results demonstrate the feasibility of using both ammonium substrates as nutrient solutions. A maximum elemental sulfur production of 95 ± 1% and a maximum H
2 S EC of 141.18 g S-H2 S m-3 h-1 (RE = 95.0%) was obtained using landfill leachate as the ammonium source. Next Generation Sequencing (NGS) analysis of the microbial community revealed that the most common genera present in the desulfurizing bioreactor were Sulfurimonas (91.8-50.9%) followed by Thauera (1.1-24.2%) and Lentimicrobium (2.0-9.7%)., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2020 Elsevier B.V. All rights reserved.)- Published
- 2021
- Full Text
- View/download PDF
44. Relationship between glycemic control and chronic obstructive pulmonary disease in patients with type 2 diabetes: A nested case-control study.
- Author
-
Del Pino-Sedeño T, González de León B, Pérez Martín EF, Martín Gandolfo AM, Estupiñán Ramírez M, Redondo M, Ramallo-Fariña Y, and Trujillo-Martín MM
- Subjects
- Blood Glucose, Case-Control Studies, Glycated Hemoglobin analysis, Glycemic Control, Humans, Retrospective Studies, Diabetes Mellitus, Type 2 diagnosis, Diabetes Mellitus, Type 2 epidemiology, Pulmonary Disease, Chronic Obstructive diagnosis, Pulmonary Disease, Chronic Obstructive epidemiology
- Abstract
Aims: To evaluate the relationship between glycemic control and plasma glycated hemoglobin (HbA1c) levels in patients with type 2 diabetes mellitus (T2D) and the risk of chronic obstructive pulmonary disease (COPD)., Methods: We conducted a population-based, retrospective, nested, case-control study involving 124,876 patients with DM2 from the Canary Islands, Spain. From the cohort, we selected all COPD cases and, for each case, five control subjects who were COPD free. We analyzed the association between glycemic control, HbA1c level and incident COPD., Results: A total of 1320 incidence cases of COPD (1.06%) were identified and matched individually with 6600 controls according to age and sex. After multivariate adjustment, the COPD risk increased among patients with poor glycemic control compared to patients with good glycemic control [HbA1c levels <7% (53 mmol/mol)] (OR 1.18; 95% CI: 1.03-1.36). In comparison with patients exhibiting HbA1c levels <7% (53 mmol/mol), the risk of COPD was higher among people with HbA1c levels of 7-8% (53-64 mmol/mol) (OR 1.24; 95% CI: 1.05-1.47) and 8-9% (64-75 mmol/mol) (OR 1.31; 95% CI: 1.04-1.66)., Conclusions: Poor glycemic control reveals a weak association with increased risk of COPD in T2D patients., (Copyright © 2020 Primary Care Diabetes Europe. All rights reserved.)
- Published
- 2020
- Full Text
- View/download PDF
45. Characterization of plastic beach litter by Raman spectroscopy in South-western Spain.
- Author
-
Asensio-Montesinos F, Oliva Ramírez M, González-Leal JM, Carrizo D, and Anfuso G
- Abstract
The characteristics and distribution of plastic litter were evaluated in October 2018 at 40 beaches along the coast of Cádiz Province, in Spain. A total of 14,261 plastic items, appertaining to 57 litter groups, were identified along the study area at different beach zones, i.e. at low tide water level (2%), along the foreshore (6%), at high tide water level (67%) and in the backshore area (25%). Plastic items have a great floatability, being this one of the main reasons for their proportional dominance among beach litter, especially in the wrack line. Hundreds of measurements were made of different items using Raman spectroscopy, an effective technique to determine the type of plastic. Cellulose acetate represented the most abundant material (79%) linked to cigarette butts, followed by polypropylene, 9% and polyethylene, 8%. The remaining were composed by polystyrene, polyethylene terephthalate and polyvinyl chloride. Smoke related items were the most common in the study area, followed by film and hard pieces, cotton bud sticks, fishing strings, food wrappers, caps/lids and single-use plastics. Beach litter can be related to beachgoers but some categories can be attributed to fishing activities or wastewater discharges. Plastics cause a multitude of damages to the coastal ecosystem, due to their toxic components and adsorbed substances and their facility of fragmentation and dispersion. Principal objective is the compositional characterization of plastic beach litter items and their spatial variability. It is therefore important to avoid unnecessary consumption, promote recycling and use other materials that are less harmful to the environment., Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper., (Copyright © 2020. Published by Elsevier B.V.)
- Published
- 2020
- Full Text
- View/download PDF
46. A case series of infants with increased VAMP7 gene dosage at birth and virilization defects.
- Author
-
Chávez-López S, de Jesús Lugo-Trampe J, Ibarra-Ramírez M, Calvo-Anguiano G, Martínez-de-Villarreal LE, and Campos-Acevedo LD
- Subjects
- Comparative Genomic Hybridization, Female, Gene Dosage, Humans, Infant, Infant, Newborn, Male, R-SNARE Proteins genetics, Virilism, Cryptorchidism, Hypospadias
- Abstract
Background: Genitourinary disorders are the most frequent congenital defects in newborns; however, little is known about their etiology. Several studies have been carried out to find genetic risk factors in the development of these malformations. The expression of VAMP7 is found in testes, epididymis, seminal vesicles, prostatic tissues, penis, and urethra. Alterations in gene dose of VAMP7 were recently reported in a subset of male patients initially identified clinically by the presence of congenital genitourinary disorders. In 2016, the authors developed a diagnostic algorithm for early detection of sex chromosome aneuploidies by quantifying the SHOX, VAMP7, and SRY gene dose in newborns by qPCR using dried blood spot (DBS) samples., Objective: Correlate the increased gene dose of VAMP7, obtained by qPCR using DBS, with genitourinary congenital defects attributable to disorders in virilization and verify the increased gene dose by microarrays., Study Design: Samples that only presented increased VAMP7 gene dosage were selected from a previously analyzed group of 5088 males in which the early detection of sex chromosomes aneuploidies was performed. Eight males were found with an increased gene dose of VAMP7 (relative quantitation > 1.3) and were called in for a complete clinical evaluation aimed at the identification of genitourinary anomalies, qPCR and microarrays., Results: Eight males from 5088 samples were identified with increased VAMP7 gene dosage of which six patients were clinically evaluated, of which 50% were identified with alterations in genital development (bilateral cryptorchidism, unilateral cryptorchidism, and glandular hypospadias) and speech delay, while the rest presented different types of atopy., Discussion: Tannour-Louet et al. postulated on 2014 that the duplication of the Xq28 region, specifically of VAMP7, plays a role in the human masculinization disorders of the urogenital tract. The study was based on array comparative genomic hybridization (aCGH) results performed to 116 males with disorders of sexual differentiation. In the present study, the patients were initially selected due to an increased gene dose of VAMP7 detected by qPCR, then the clinical evaluation and the aCGH were performed, inverse to what was reported previously but with similar percentages between both studies., Conclusion: In this work, the authors report cases of cryptorchidism, hypospadias, language delay and atopy in male preschoolers initially identified because they have an increased gene dose of VAMP7., (Copyright © 2019. Published by Elsevier Ltd.)
- Published
- 2020
- Full Text
- View/download PDF
47. Characterization of eubacterial communities by Denaturing Gradient Gel Electrophoresis (DGGE) and Next Generation Sequencing (NGS) in a desulfurization biotrickling filter using progressive changes of nitrate and nitrite as final electron acceptors.
- Author
-
Brito J, Valle A, Almenglo F, Ramírez M, and Cantero D
- Subjects
- Epsilonproteobacteria chemistry, Microbiota, Thiobacillus chemistry, Denaturing Gradient Gel Electrophoresis, Electrons, Filtration, High-Throughput Nucleotide Sequencing, Nitrates chemistry, Nitrites chemistry
- Abstract
Anoxic biotrickling filters (BTFs) represent a technology with high H
2 S elimination capacity and removal efficiencies widely studied for biogas desulfurization. Three changes in the final electron acceptors were made using nitrate and nitrite during an operating period of 520 days. The stability and performance of the anoxic BTF were maintained when a significant perturbation was applied to the system that involved the progressive change of nitrate to nitrite and vice versa. Here the impact of electron acceptor changes on the microbial community was characterized by denaturing gel gradient electrophoresis (DGGE) and next generation sequencing (NGS). Both platforms revealed that the community underwent changes during the perturbations but was resilient because the removal capacity did not significantly change. Proteobacteria and Bacteroidetes were the main Phyla and Sulfurimonas and Thiobacillus the main nitrate-reducing sulfide-oxidizing bacteria (NR-SOB) genera involved in the biodesulfurization process., (Copyright © 2020 Elsevier B.V. All rights reserved.)- Published
- 2020
- Full Text
- View/download PDF
48. Maternal energy status during late gestation: Effects on growth performance, carcass characteristics and meat quality of steers progeny.
- Author
-
Ramírez M, Testa LM, López Valiente S, Latorre ME, Long NM, Rodriguez AM, Pavan E, and Maresca S
- Subjects
- Adipose Tissue, Animals, Animals, Newborn, Argentina, Body Composition, Body Weight, Cattle growth & development, Female, Male, Muscle, Skeletal, Pregnancy, Shear Strength, Cattle physiology, Diet veterinary, Maternal Nutritional Physiological Phenomena physiology, Pregnancy, Animal physiology, Red Meat analysis
- Abstract
The objetive of the current study was to determine the effect of maternal energy status during late gestation on growth performance, carcass characteristics and meat quality of steer progeny. At 180 ± 4 d of gestation 56 multiparous Angus cows were blocked by BW and expected calving date and asigned to three levels of nutrition energy: SR (severe restricted; 50% of NRC requirement), MR (moderate restricted; 75% of requirement) and NR (no restricted; 100% of requirement). After parturition, all cows were managed in a single group during lactation. A total of 25 male calves (SR = 8 calves; MR = 9 calves; NR = 8 calves) were born from pregnant cows and all pens had at least one male calf. After weaning, male calves were separated of female calves and were stockered on native range until 24 ± 0.1 months of age then placed into a feedlot for 104 d before harvest. Cow BW and BCS decreased linearly (P < .01) as nutritional energy restriction increased. Calves from SR dams were lighter (P = .04) than calves from MR and NR dams at parturition, however, at weaning and harvest BW was similar for SR and NR steers and decreased in MR steers. Steers from SR dams demonstrated catch-up growth with a tendecy to increased ADG from birth to harvest compared to MR and NR steers (P = .06). Hot carcass weigth was similar in SR and NR steers and increased in MR steers (P = .01). Longissimus muscle area was not affected (P > .10) by maternal energy status, however, 12 rib fat thickness was greater in SR and MR compared to NR steers (P < .01). Tenderness of Longissimus muscle was decreased in MR compared to SR and NR steers after 3d of aging. No treatment differences (P > .10) were observed in sarchomere length or collagen content. Adipocyte diameter was similar (P > .10) between treatments suggesting that decreased 12th rib fat thicness in MR steers could be due to decreased fat tissue hyperplasia. These results indicate that level of energy restriction during late gestation does no have linear response on growth performance and carcass quality of steers progeny., Competing Interests: Declaration of Competing Interest The authors whose names were listed previously certify that they have NO affiliations with or involvement in any organization or entity with any financial interest (such as honoraria; educational grants; participation in speakers' bureaus; membership, employment, consultancies, stock ownership, or other equity interest; and expert testimony or patent-licensing arrangements), or non-financial interest (such as personal or professional relationships, affiliations, knowledge or beliefs) in the subject matter or materials discussed in this manuscript., (Copyright © 2020 Elsevier Ltd. All rights reserved.)
- Published
- 2020
- Full Text
- View/download PDF
49. Distinct and shared contributions of diagnosis and symptom domains to cognitive performance in severe mental illness in the Paisa population: a case-control study.
- Author
-
Service SK, Vargas Upegui C, Castaño Ramírez M, Port AM, Moore TM, Munoz Umanes M, Agudelo Arango LG, Díaz-Zuluaga AM, Melo Espejo J, López MC, Palacio JD, Ruiz Sánchez S, Valencia J, Teshiba TM, Espinoza A, Olde Loohuis L, De la Hoz Gomez J, Brodey BB, Sabatti C, Escobar JI, Reus VI, Lopez Jaramillo C, Gur RC, Bearden CE, and Freimer NB
- Subjects
- Adult, Case-Control Studies, Colombia, Female, Humans, Linear Models, Male, Middle Aged, Young Adult, Bipolar Disorder psychology, Cognition, Cognition Disorders psychology, Depressive Disorder, Major psychology, Schizophrenic Psychology
- Abstract
Background: Severe mental illness diagnoses have overlapping symptomatology and shared genetic risk, motivating cross-diagnostic investigations of disease-relevant quantitative measures. We analysed relationships between neurocognitive performance, symptom domains, and diagnoses in a large sample of people with severe mental illness not ascertained for a specific diagnosis (cases), and people without mental illness (controls) from a single, homogeneous population., Methods: In this case-control study, cases with severe mental illness were ascertained through electronic medical records at Clínica San Juan de Dios de Manizales (Manizales, Caldas, Colombia) and the Hospital Universitario San Vicente Fundación (Medellín, Antioquía, Colombia). Participants were assessed for speed and accuracy using the Penn Computerized Neurocognitive Battery (CNB). Cases had structured interview-based diagnoses of schizophrenia, bipolar 1, bipolar 2, or major depressive disorder. Linear mixed models, using CNB tests as repeated measures, modelled neurocognition as a function of diagnosis, sex, and all interactions. Follow-up analyses in cases included symptom factor scores obtained from exploratory factor analysis of symptom data as main effects., Findings: Between Oct 1, 2017, and Nov 1, 2019, 2406 participants (1689 cases [schizophrenia n=160; bipolar 1 disorder n=519; bipolar 2 disorder n=204; and major depressive disorder n=806] and 717 controls; mean age 39 years (SD 14); and 1533 female) were assessed. Participants with bipolar 1 disorder and schizophrenia had similar impairments in accuracy and speed across cognitive domains. Participants with bipolar 2 disorder and major depressive disorder performed similarly to controls, with subtle deficits in executive and social cognition. A three-factor model (psychosis, mania, and depression) best represented symptom data. Controlling for diagnosis, premorbid IQ, and disease severity, high lifetime psychosis scores were associated with reduced accuracy and speed across cognitive domains, whereas high depression scores were associated with increased social cognition accuracy., Interpretation: Cross-diagnostic investigations showed that neurocognitive function in severe mental illness is characterised by two distinct profiles (bipolar 1 disorder and schizophrenia, and bipolar 2 disorder and major depressive disorder), and is associated with specific symptom domains. These results suggest the utility of this design for elucidating severe mental illness causes and trajectories., Funding: US National Institute of Mental Health., (Copyright © 2020 Elsevier Ltd. All rights reserved.)
- Published
- 2020
- Full Text
- View/download PDF
50. Postprandial inflammatory responses after oral glucose, lipid and protein challenges: Influence of obesity, sex and polycystic ovary syndrome.
- Author
-
Martínez-García MÁ, Moncayo S, Insenser M, Montes-Nieto R, Fernández-Durán E, Álvarez-Blasco F, Luque-Ramírez M, and Escobar-Morreale HF
- Subjects
- Administration, Oral, Adult, Dietary Proteins administration & dosage, Dietary Proteins blood, Female, Glucose administration & dosage, Glucose metabolism, Humans, Lipids administration & dosage, Lipids blood, Male, Sex Factors, Young Adult, Dietary Proteins pharmacology, Glucose pharmacology, Inflammation blood, Lipids pharmacology, Obesity blood, Polycystic Ovary Syndrome blood, Postprandial Period
- Abstract
Background & Aims: Most evidence linking the polycystic ovary syndrome (PCOS) with chronic low-grade inflammation has been obtained in the fasting state. We have studied the postprandial inflammatory response to oral glucose, lipid and protein challenges and the possible influences of obesity, sex and PCOS on these responses., Methods: On alternate days, we submitted 17 women with PCOS (9 non-obese, 8 obese), 17 control women (9 non-obese, 8 obese) and 19 control men (10 non-obese, 9 obese) to isocaloric (300 Kcal) oral macronutrient loads. We assayed serum for TNF-α, IL-6, IL-18, IL-10, pentraxin-3 and galectin-3 concentrations and leukocytes for expression of TNF, IL6, IL10 and their receptors TNFRSF1B, IL6R and IL10RA., Results: Circulating IL-6 levels decreased after glucose and protein ingestion but slightly increased after oral lipid intake. Leukocyte IL6 expression did not change after the ingestion of any macronutrient yet IL6R expression increased during all macronutrient challenges, the largest increase being observed after glucose ingestion. Serum TNF-α similarly decreased during either macronutrient load, whereas TNF expression increased after macronutrient ingestion, the highest increase observed after oral glucose. TNFRSF1B expression also increased after glucose intake but not after lipid or protein ingestion. No global effect of obesity or group on postprandial circulating IL-6, TNF-α, or IL6, IL6R, TNF and TNFRSF1B expression was found. Circulating IL-18 concentrations decreased during all oral challenges, whereas in case of galectin-3 and pentraxin-3 only the protein load caused a reduction in its concentrations. Of the genes studied here, IL10 showed the largest increase in expression throughout all the postprandial curves, particularly after glucose. Obesity blunted the increase in IL10 expression. IL10RA expression decreased after glucose ingestion but remained unchanged during lipid and protein loads., Conclusions: Glucose ingestion, as opposed to lipid and protein intake, results into the largest increase in leukocyte gene expression of inflammatory mediators. The expression of the anti-inflammatory cytokine IL10 was the largest observed here, suggesting a compensatory mechanisms against postprandial inflammation that may be blunted in obesity. However, these responses did not translate into the circulating concentrations of these inflammatory mediators during the immediate postprandial phase., (Copyright © 2019 Elsevier Ltd and European Society for Clinical Nutrition and Metabolism. All rights reserved.)
- Published
- 2020
- Full Text
- View/download PDF
Catalog
Discovery Service for Jio Institute Digital Library
For full access to our library's resources, please sign in.