882 results on '"Rolando B"'
Search Results
102. Cold acclimation enhances UCP1 content, lipolysis, and triacylglycerol resynthesis, but not mitochondrial uncoupling and fat oxidation, in rat white adipocytes
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Rolando B. Ceddia, Diane M Sepa-Kishi, Daniel Da Eira, and Shailee Jani
- Subjects
Male ,medicine.medical_specialty ,Glycerol kinase ,Physiology ,Acclimatization ,Adipose Tissue, White ,Lipolysis ,White adipose tissue ,Mitochondrial Proteins ,03 medical and health sciences ,0302 clinical medicine ,Adipose Tissue, Brown ,Internal medicine ,Browning ,medicine ,Cold acclimation ,Animals ,White Adipocytes ,Rats, Wistar ,Beta oxidation ,Triglycerides ,Uncoupling Protein 1 ,030304 developmental biology ,0303 health sciences ,Chemistry ,Thermogenesis ,Cell Biology ,Mitochondria ,Rats ,Cold Temperature ,Endocrinology ,Energy Metabolism ,Oxidation-Reduction ,030217 neurology & neurosurgery ,Research Article - Abstract
The objective of this study was to investigate whether cold-induced browning of the subcutaneous (Sc) inguinal (Ing) white adipose tissue (WAT) increases the capacity of this tissue to oxidize fatty acids through uncoupling protein 1 (UCP1)-mediated thermogenesis. To accomplish that, rats were acclimated to cold (4°C for 7 days). Subsequently, interscapular and aortic brown adipose tissues (iBAT and aBAT, respectively), epididymal (Epid), and Sc Ing WAT were used for adipocyte isolation. In BAT adipocytes, cold acclimation increased UCP1 content and palmitate oxidation either in the absence or presence of oligomycin, whereas in Sc Ing adipocytes glucose and palmitate oxidation were not affected, although multilocular adipocytes were formed and UCP1 content increased upon cold acclimation in the WAT. Furthermore, isoproterenol-stimulated cold Sc Ing adipocytes exhibited significantly lower rates of palmitate oxidation than control cells when exposed to oligomycin. These findings provide evidence that, despite increasing UCP1 levels, cold acclimation essentially reduced mitochondrial uncoupling-mediated fat oxidation in Sc Ing adipocytes. Conversely, glycerol kinase and phosphoenolpyruvate carboxykinase levels, isoproterenol-induced lipolysis, as well as glycerol and palmitate incorporation into lipids significantly increased in these cells. Therefore, instead of UCP1-mediated mitochondrial uncoupling, cold acclimation increased the capacity of Sc Ing adipocytes to export fatty acids and enhanced key components of the triacylglycerol resynthesis pathway in the Sc Ing WAT.
- Published
- 2019
103. Towards a therapy for phosphomannomutase 2 deficiency: the prodrug approach for the delivery of alpha-glucose-1,6-bisphosphate
- Author
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Sodano F. 1, Rolando B. 1, Rimoli M.G. 2, Cubellis M.V. 3, 4, Monticelli M. 4, Allocca M. 3, 5, Liguori L. 3, Andreotti G. 3, and Lazzarato L. 1
- Subjects
6-bisphosphate ,pro-drug ,organic synthesis ,glucose-1 ,PMM2-CDG - Abstract
Phosphomannomutase2 deficit, or PMM2-CDG, is the most common congenital disorder of glycosylation affecting over 1,000 patients globally and it is still without a cure. The majority of the mutations causing the disease destabilize PMM2, which, under physiological conditions, catalyses the conversion of mannose-6-phosphate into mannose- 1-phosphate. Mannose-1-phosphate is in turn converted into guanosine diphosphate-mannose, a fundamental precursor for N-glycosylation process of proteins. All PMM2-CDG patients have some residual PMM2 enzymatic activity since complete absence of this activity is incompatible with life. A promising strategy to cure PMM2-CDG is based on the use of pharmacological chaperones (PCs), which are low molecular weight compounds able to stabilize the mutated enzyme and increase its intracellular concentration. In-vitro tests have demonstrated that alpha-glucose- 1,6-bisphosphate binds, stabilizes and increases the activity of PMM2 (both wild type and mutants). Regrettably, it cannot be directly administered to cell cultures for its inability to cross cell membranes. In this framework, prodrug strategy plays a central role in drug development allowing the improvement of a specific parent drug. Consistently, we designed and synthesized a promising prodrug of alpha-glucose-1,6-bisphosphate, 2,3,4-tri-O-acetylglucose-1,6- bis(diphenylphosphate) (LipoG-1,6P). LipoG-1,6P has shown great chemical stability at physiological pH while its half-life in human serum was 10.5 hours. Moreover, its cytotoxicity in HEK293 cells was evaluated by MTT test. The next step will be evaluating the capability of LipoG-1,6P to cross the cell membrane, to release PC (alpha-glucose-1,6- bisphosphate) and consequently enhance PMM2 enzymatic activity.
- Published
- 2019
104. Correction to: Light-regulated no release as a novel strategy to overcome doxorubicin multidrug resistance (ACS Medicinal Chemistry Letters (2017) 8:3 (361-365) DOI: 10.1021/acsmedchemlett.7b00016)
- Author
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Chegaev, K., Fraix, A., Gazzano, E., Abd-Ellatef, G. E. F., Blangetti, M., Rolando, B., Conoci, S., Riganti, C., Fruttero, R., Gasco, A., and Sortino, S.
- Published
- 2019
105. Lino Brocka
- Author
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Rolando B. Tolentino
- Published
- 2019
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106. 3PC-001 Compatibility and stability assessment of a sodium glycerophosphate formulation mixed in bags for neonatal total parenteral nutrition
- Author
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Isoardo, A, primary, Grande, E, additional, Ferrero, MM, additional, Viglione, M, additional, Rolando, B, additional, Fruttero, R, additional, and Fruttero, C, additional
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- 2020
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107. Effects of the adiponectin mimetic compound ALY688 on glucose and fat metabolism in visceral and subcutaneous rat adipocytes
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Da Eira, Daniel, primary, Jani, Shailee, additional, Sung, Hyekyoung, additional, Sweeney, Gary, additional, and Ceddia, Rolando B., additional
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- 2020
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108. Endothelial-specific FoxO1 depletion prevents obesity-related disorders by increasing vascular metabolism and growth
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Christopher G. R. Perry, Diane M Sepa-Kishi, Armin Makki, Tara L. Haas, Martina Rudnicki, Sofhia V. Ramos, Ghoncheh Abdifarkosh, Emmanuel Nwadozi, Emilie Roudier, and Rolando B. Ceddia
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0301 basic medicine ,Male ,Mouse ,Angiogenesis ,Adipose tissue ,FOXO1 ,Energy homeostasis ,angiogenesis ,Homeostasis ,Biology (General) ,2. Zero hunger ,Mice, Knockout ,Forkhead Box Protein O1 ,General Neuroscience ,General Medicine ,Organ Size ,glycolysis ,endothelial cells ,3. Good health ,Up-Regulation ,Endothelial stem cell ,medicine.anatomical_structure ,Phenotype ,Organ Specificity ,FoxO1 ,Medicine ,Research Article ,medicine.medical_specialty ,Endothelium ,diet-induced obesity ,QH301-705.5 ,Science ,Context (language use) ,Biology ,Carbohydrate metabolism ,Intra-Abdominal Fat ,Vascular Remodeling ,Diet, High-Fat ,Models, Biological ,General Biochemistry, Genetics and Molecular Biology ,03 medical and health sciences ,Internal medicine ,medicine ,Animals ,Obesity ,Muscle, Skeletal ,Human Biology and Medicine ,Triglycerides ,General Immunology and Microbiology ,Cell Biology ,030104 developmental biology ,Endocrinology ,Glucose ,Microvessels ,Endothelium, Vascular - Abstract
Impaired angiogenesis is a hallmark of metabolically dysfunctional adipose tissue in obesity. However, the underlying mechanisms restricting angiogenesis within this context remain ill-defined. Here, we demonstrate that induced endothelial-specific depletion of the transcription factor Forkhead Box O1 (FoxO1) in male mice led to increased vascular density in adipose tissue. Upon high-fat diet feeding, endothelial cell FoxO1-deficient mice exhibited even greater vascular remodeling in the visceral adipose depot, which was paralleled with a healthier adipose tissue expansion, higher glucose tolerance and lower fasting glycemia concomitant with enhanced lactate levels. Mechanistically, FoxO1 depletion increased endothelial proliferative and glycolytic capacities by upregulating the expression of glycolytic markers, which may account for the improvements at the tissue level ultimately impacting whole-body glucose metabolism. Altogether, these findings reveal the pivotal role of FoxO1 in controlling endothelial metabolic and angiogenic adaptations in response to high-fat diet and a contribution of the endothelium to whole-body energy homeostasis., eLife digest In the body, thread-like blood vessels called capillaries weave their way through our tissues to deliver oxygen and nutrients to every cell. When a tissue becomes bigger, existing vessels remodel to create new capillaries that can reach far away cells. However, in obesity, this process does not happen the way it should: when fat tissues expand, new blood vessels do not always grow to match. The starved fat cells can start to dysfunction, which causes a range of issues, from inflammation and scarring of the tissues to problems with how the body processes sugar and even diabetes. Yet, it is still unclear why exactly new capillaries fail to form in obesity. What we know is that a protein called FoxO (short for Forkhead box O) is present in the cells that line the inside of blood vessels, and that it can stop the development of new capillaries. FoxO controls how cells spend their energy, and it can force them to go into a resting state. During obesity, the levels of FoxO actually increase in capillary cells. Therefore, it may be possible that FoxO prevents new blood vessels from growing in the fat tissues of obese individuals. To find out, Rudnicki et al. created mice that lack the FoxO protein in the cells lining the capillaries, and then fed the animals a high-fat diet. These mutant mice had more blood vessels in their fat tissue, and their fat cells looked healthier. They also stored less fat than normal mice on the same diet, and their blood sugar levels were normal. This was because the FoxO-deprived cells inside capillaries were burning more energy, which they may have obtained by pulling sugar from the blood. These results show that targeting the cells that line capillaries helps new blood vessels to grow, and that this could mitigate the health problems that arise with obesity, such as high levels of sugar (diabetes) and fat in the blood. However, more work is needed to confirm that the same cellular processes can be targeted to obtain positive health outcomes in humans.
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- 2018
109. Author response: Endothelial-specific FoxO1 depletion prevents obesity-related disorders by increasing vascular metabolism and growth
- Author
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Tara L. Haas, Martina Rudnicki, Sofhia V. Ramos, Emilie Roudier, Christopher G. R. Perry, Armin Makki, Diane M Sepa-Kishi, Emmanuel Nwadozi, Rolando B. Ceddia, and Ghoncheh Abdifarkosh
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medicine.medical_specialty ,Endocrinology ,business.industry ,Internal medicine ,medicine ,FOXO1 ,Metabolism ,medicine.disease ,business ,Obesity - Published
- 2018
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110. Transvestites and Transgressions: Panggagaya in Philippine Gay Cinema
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Rolando B. Tolentino
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- 2018
- Full Text
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111. Circulating fibroblast growth factor 21 is reduced, whereas its production is increased in a fat depot-specific manner in cold-acclimated rats
- Author
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Diane M Sepa-Kishi and Rolando B. Ceddia
- Subjects
0301 basic medicine ,Male ,medicine.medical_specialty ,Histology ,FGF21 ,Depot ,MAP Kinase Signaling System ,Adipose tissue ,03 medical and health sciences ,Eating ,0302 clinical medicine ,Internal medicine ,medicine ,Cold acclimation ,Animals ,Phosphorylation ,Rats, Wistar ,Chemistry ,Cold-Shock Response ,β klotho ,Thermogenesis ,Cell Biology ,Fibroblast Growth Factors ,030104 developmental biology ,Endocrinology ,Adipose Tissue ,Liver ,Fibroblast growth factor receptor ,030217 neurology & neurosurgery ,Research Paper - Abstract
This study investigated the effects of cold acclimation on circulating fibroblast growth factor 21 (FGF21) levels, as well as its production and signaling in classical brown and white adipose tissues. Male Wistar rats were cold (4°C) acclimatized for 7 days. Subsequently, liver, interscapular and aortic BAT (iBAT and aBAT), and the Sc Ing and epididymal (Epid) white adipose tissues were extracted. Cold acclimation significantly reduced circulating FGF21 and its liver expression. Conversely, FGF21 content increased in iBAT, aBAT and Sc Ing fat depots, along with the expressions of the Fgf21 receptor and the receptor co-factor β-klotho. Cold acclimation increased FGF21 secretion from Sc Ing and Epid adipocytes, although only iBAT and Sc Ing fat depots enhanced ERK1/2 phosphorylation. These findings provide evidence that FGF21 acts in an autocrine/paracrine manner in iBAT and Sc Ing fat depots under cold-acclimating conditions and may contribute to driving depot-specific thermogenic adaptive responses.
- Published
- 2018
112. Niche Globality
- Author
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Rolando B. Tolentino
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- 2018
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113. Impact of Exercise Training and Enalapril, either alone or in Combination, on White Adipose Tissue Renin‐Angiotensin System in a Diet‐Induced Obesity Model
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Antonio Claudio Lucas da Nóbrega, Carlos Adam Conte-Junior, Eliete Dalla Corte Frantz, Fernanda Marques Freitas, Matheus Pereira Machado, Beatriz Alexandre, Mariana Sodré Boêta Andrade, Carla Paulo Vieira, Rolando B. Ceddia, Agatha Cristie Menezes, and Isabele Gomes Giori
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0301 basic medicine ,medicine.medical_specialty ,business.industry ,White adipose tissue ,medicine.disease ,Biochemistry ,Obesity ,03 medical and health sciences ,030104 developmental biology ,Endocrinology ,Internal medicine ,Renin–angiotensin system ,Genetics ,medicine ,Enalapril ,business ,Molecular Biology ,Biotechnology ,medicine.drug - Published
- 2018
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114. Müllerianosis: A Case Report
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Salada, Rolando B., primary, Yong, Daniel, additional, Ho, Chi Shern Bernard, additional, and Chong, Yew Lam, additional
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- 2019
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115. Localised primary amyloidosis of inguinal lymph node with superimposed bone metaplasia
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Spitale, Luis S., Jimenez, Delia B., and Montenegro, Rolando B.
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- 1998
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116. Cold-induced changes in the energy coupling and the UCP3 level in rodent skeletal muscles
- Author
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Simonyan, Ruben A., Jimenez, Maria, Ceddia, Rolando B., Giacobino, Jean-Paul, Muzzin, Patrick, and Skulachev, Vladimir P.
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- 2001
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117. White and beige adipocytes: are they metabolically distinct?
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Diane M Sepa-Kishi and Rolando B. Ceddia
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0301 basic medicine ,medicine.medical_specialty ,Adipose Tissue, White ,Lipolysis ,Endocrinology, Diabetes and Metabolism ,Stimulation ,White adipose tissue ,Biology ,03 medical and health sciences ,0302 clinical medicine ,Endocrinology ,Internal medicine ,Brown adipose tissue ,medicine ,Browning ,Animals ,Humans ,Adipocytes, Beige ,Molecular Biology ,Uncoupling Protein 1 ,Thermogenesis ,General Medicine ,Compartment (chemistry) ,Thermogenin ,Mitochondria ,030104 developmental biology ,medicine.anatomical_structure ,Energy Metabolism ,030217 neurology & neurosurgery - Abstract
The white adipose tissue (WAT) exhibits great plasticity and can undergo “browning” and acquire features of the brown adipose tissue (BAT), which takes place following cold exposure, chronic endurance exercise or β3-adrenergic stimulation. WAT that underwent browning is characterized by the presence of “beige” adipocytes, which are morphologically similar to brown adipocytes, express uncoupling protein 1 (UCP1) and are considered thermogenically competent. Thus, inducing a BAT-like phenotype in the WAT could promote energy dissipation within this depot, reducing the availability of substrate that would otherwise be stored in the WAT. Importantly, BAT in humans only represents a small proportion of total body mass, which limits the thermogenic capacity of this tissue. Therefore, browning of the WAT could significantly expand the energy-dissipating capacity of the organism and be of therapeutic value in the treatment of metabolic diseases. However, the question remains as to whether WAT indeed changes its metabolic profile from an essentially fat storage/release compartment to an energy dissipating compartment that functions much like BAT. Here, we discuss the differences with respect to thermogenic capacity and metabolic characteristics between white and beige adipocytes to determine whether the latter cells indeed significantly enhance their capacity to dissipate energy through UCP1-mediated mitochondrial uncoupling or by the activation of alternative UCP1-independent futile cycles.
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- 2018
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118. Cold acclimation causes fiber type-specific responses in glucose and fat metabolism in rat skeletal muscles
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Rolando B. Ceddia, Ayesha Iqbal, Diane M Sepa-Kishi, Yass Sotoudeh-Nia, and George Bikopoulos
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Male ,0301 basic medicine ,medicine.medical_specialty ,SERCA ,Acclimatization ,Proteolipids ,Muscle Proteins ,lcsh:Medicine ,Carbohydrate metabolism ,Article ,Sarcoplasmic Reticulum Calcium-Transporting ATPases ,03 medical and health sciences ,chemistry.chemical_compound ,0302 clinical medicine ,GSK-3 ,Internal medicine ,medicine ,Cold acclimation ,Animals ,Glycolysis ,Rats, Wistar ,Muscle, Skeletal ,lcsh:Science ,Glycogen synthase ,Protein kinase A ,Multidisciplinary ,biology ,Glycogen ,Chemistry ,lcsh:R ,Thermogenesis ,Lipid Metabolism ,Rats ,Cold Temperature ,Glucose ,030104 developmental biology ,Endocrinology ,Gene Expression Regulation ,Biochemistry ,Models, Animal ,biology.protein ,lcsh:Q ,Oxidation-Reduction ,030217 neurology & neurosurgery - Abstract
This study investigated fiber type-specific metabolic responses and the molecular mechanisms that regulate glucose and fat metabolism in oxidative and glycolytic muscles upon cold acclimation. Male Wistar rats were exposed to cold (4 °C) for 7 days, and then glycogen synthesis and content, glucose and palmitate oxidation, and the molecular mechanisms underlying these metabolic pathways were assessed in soleus (Sol), extensor digitorum longus (EDL), and epitrochlearis (Epit) muscles. Cold acclimation increased glycogen synthesis, glycogen content, glucose oxidation, and reduced glycogen synthase (GS) phosphorylation only in Sol muscles. Protein kinase B (AKT), glycogen synthase kinase 3 (GSK3), and AMP-activated protein kinase (AMPK) phosphorylation increased in all three muscles upon cold acclimation. Cold acclimation increased palmitate oxidation, gene expression of the transcriptional co-activator Pgc-1α, lipoprotein lipase (Lpl), fatty acid transporter (Cd36), and Sarco/endoplasmic reticulum Ca2+-ATPase (Serca) in Sol, EDL, and Epit muscles. Sarcolipin was only detected and had its content increased in Sol muscles. In conclusion, cold-induced thermogenesis activated similar signaling pathways in oxidative and glycolytic muscles, but the metabolic fate of glucose differed in skeletal muscles with distinct fiber type composition. Furthermore, only muscles rich in type I fibers appeared to have the capacity for sarcolipin-mediated SERCA uncoupling.
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- 2017
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119. Percepción de beneficios y co-beneficios de las viviendas energéticamente eficientes. Un análisis para Barcelona
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Rolando Biere-Arenas, Carlos Marmolejo-Duarte, Eva Crespo-Sánchez, and Belén Onecha-Pérez
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ahorro energético ,eficiencia energética residencial ,rehabilitación residencial ,salud y confort ,barcelona (españa) ,Fine Arts ,Architecture ,NA1-9428 - Abstract
El parque edificado europeo es responsable del 36% de las emisiones de gases de efecto invernadero y del 40% del consumo de energía y su rehabilitación reduciría un 26% del consumo. Además de los beneficios económicos de esta reducción, como su incidencia en reducir la pobreza energética, las viviendas energéticamente eficientes implican co-beneficios en el confort y la salud de sus habitantes; sin embargo, los hogares no son conscientes de ello, lo que, aunado a otras barreras, desincentiva la obtención de viviendas eficientes. Este trabajo persigue conocer la importancia que otorgan los hogares a los beneficios y co-beneficios asociados a la eficiencia energética; entender si es homogénea entre éstos e identificar su correlación con sus características sociodemográficas. Para ello, se realiza una encuesta a una muestra de hogares de Barcelona. Mediante un análisis multivariante, se identifican los patrones de la relevancia otorgada a las distintas ventajas y su asociación estadística con las características sociodemográficas de los hogares. Los resultados sugieren que la importancia de estos beneficios es heterogénea. Las personas mayores y de mayor renta aprecian más co-beneficios como la salud, el confort y la conservación medioambiental, pero las personas más jóvenes y de menor renta valoran más los ahorros.
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- 2023
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120. Cold acclimation enhances UCP1 content, lipolysis, and triacylglycerol resynthesis, but not mitochondrial uncoupling and fat oxidation, in rat white adipocytes
- Author
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Sepa-Kishi, Diane M., primary, Jani, Shailee, additional, Da Eira, Daniel, additional, and Ceddia, Rolando B., additional
- Published
- 2019
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121. Resistance Exercise Modulates Oxidative Stress Parameters and TNF-a Content in the Heart of Mice with Diet-Induced Obesity
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Effting, Pauline Souza, primary, Brescianini, Stella M. S., additional, Sorato, Helen R., additional, Fernandes, Bruna Barros, additional, Fidelis, Giulia dos S. Pedroso, additional, Silva, Paulo Roberto L. da, additional, Silveira, Paulo César L., additional, Nesi, Renata T., additional, Ceddia, Rolando B., additional, and Pinho, Ricardo A., additional
- Published
- 2019
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122. Enalapril and treadmill running reduce adiposity, but only the latter causes adipose tissue browning in mice.
- Author
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Giori, Isabele G., Magliano, D'Angelo C., Alexandre‐Santos, Beatriz, Fernandes, Tiago, Oliveira, Edilamar M., Vieira, Carla P., Conte‐Junior, Carlos A., Ceddia, Rolando B., Nobrega, Antonio C. L., and Frantz, Eliete D. C.
- Subjects
BROWN adipose tissue ,WHITE adipose tissue ,RENIN-angiotensin system ,ENALAPRIL ,OBESITY ,ADIPOSE tissues - Abstract
This study investigated whether regulation of the renin–angiotensin system (RAS) by enalapril and/or aerobic exercise training (AET) causes browning of the subcutaneous white adipose tissue (sWAT). C57BL/6 mice were fed either a standard chow or a high‐fat (HF) diet for 16 weeks. At Week 8, HF‐fed animals were divided into sedentary (HF), enalapril (HF‐E), AET (HF‐T), and enalapril plus AET (HF‐ET) groups. Subsequently, sWAT was extracted for morphometry, determination of RAS expression, and biomarkers of WAT browning. The HF group displayed adipocyte hypertrophy and induction of the classical RAS axis. Conversely, all interventions reduced adiposity and induced the counterregulatory RAS axis. However, only AET raised plasma irisin, increased peroxisome proliferator‐activated receptor‐γ coactivator‐1α, and uncoupling protein‐1 levels, and the expression of PR‐domain containing 16 in sWAT. Therefore, we concluded that AET‐induced sWAT browning was independent of the counterregulatory axis shifting of RAS in HF diet‐induced obesity. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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123. Cardiac Autophagy Deficiency Attenuates ANP Production and Disrupts Myocardial-Adipose Cross Talk, Leading to Increased Fat Accumulation and Metabolic Dysfunction.
- Author
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Song, Erfei, Da Eira, Daniel, Jani, Shailee, Sepa-Kishi, Diane, Vu, Vivian, Hunter, Howard, Lai, Mi, Wheeler, Michael B., Ceddia, Rolando B., and Sweeney, Gary
- Subjects
METABOLIC disorders ,CROSSTALK ,AUTOPHAGY ,FATTY acid oxidation ,OXYGEN consumption ,GLUCOSE metabolism ,HEART metabolism ,RESEARCH ,ANIMAL experimentation ,RESEARCH methodology ,MEDICAL cooperation ,EVALUATION research ,ATRIAL natriuretic peptides ,INSULIN ,COMPARATIVE studies ,FAT cells ,RESEARCH funding ,ADIPOSE tissues ,PHOSPHORYLATION ,INSULIN resistance ,MICE ,FATTY acids - Abstract
Increased myocardial autophagy has been established as an important stress-induced cardioprotective response. Three weeks after generating cardiomyocyte-specific autophagy deficiency, via inducible deletion of autophagy-related protein 7 (Atg7), we found that these mice (AKO) had increased body weight and fat mass without altered food intake. Glucose and insulin tolerance tests indicated reduced insulin sensitivity in AKO mice. Metabolic cage analysis showed reduced ambulatory activity and oxygen consumption with a trend of elevated respiratory exchange ratio in AKO mice. Direct analysis of metabolism in subcutaneous and visceral adipocytes showed increased glucose oxidation and reduced ATGL expression and HSL phosphorylation with no change in lipid synthesis or fatty acid oxidation. Importantly, we found AKO mice had reduced myocardial and circulating levels of atrial natriuretic peptide (ANP), an established mediator of myocardial-adipose cross talk. When normal ANP levels were restored to AKO mice with use of osmotic pump, the metabolic dysfunction evident in AKO mice was corrected. We conclude that cardiac autophagy deficiency alters myocardial-adipose cross talk via decreased ANP levels with adverse metabolic consequences. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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124. Endothelial-specific FoxO1 depletion prevents obesity-related disorders by increasing vascular metabolism and growth
- Author
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Rudnicki, Martina, primary, Abdifarkosh, Ghoncheh, additional, Nwadozi, Emmanuel, additional, Ramos, Sofhia V, additional, Makki, Armin, additional, Sepa-Kishi, Diane M, additional, Ceddia, Rolando B, additional, Perry, Christopher GR, additional, Roudier, Emilie, additional, and Haas, Tara L, additional
- Published
- 2018
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125. Author response: Endothelial-specific FoxO1 depletion prevents obesity-related disorders by increasing vascular metabolism and growth
- Author
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Rudnicki, Martina, primary, Abdifarkosh, Ghoncheh, additional, Nwadozi, Emmanuel, additional, Ramos, Sofhia V, additional, Makki, Armin, additional, Sepa-Kishi, Diane M, additional, Ceddia, Rolando B, additional, Perry, Christopher GR, additional, Roudier, Emilie, additional, and Haas, Tara L, additional
- Published
- 2018
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126. Circulating fibroblast growth factor 21 is reduced, whereas its production is increased in a fat depot-specific manner in cold-acclimated rats
- Author
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Sepa-Kishi, Diane M., primary and Ceddia, Rolando B., additional
- Published
- 2018
- Full Text
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127. Nutritional and biomass evaluation of a Megathyrsus maximus collection in a dry tropical climate in Colombia
- Author
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Juliana Isabel Carvajal-Tapia, Rolando Barahona-Rosales, Joaquín Castro-Montoya, Jacobo Arango, and Nelson José Vivas-Quila
- Subjects
Agriculture - Abstract
Agronomic and nutritional parameters of a set of 28 accessions of Megathyrsus maximus established in Colombia during the rainy season were evaluated to identify accessions with differences in nutritional quality and characterize germplasm of M. maximus. ANOVA and multivariate analysis showed differences among accessions. Agronomic variables such as plant height, dry matter yield and green fresh weight were not correlated with nutritional variables. Flowering affected nutritional quality (neutral detergent fiber, acid detergent fiber and relative feed value). Flowering, fiber content, digestibility and crude protein content had the most influence on forage quality of M. maximus. The integral evaluation of biomass and nutritional parameters showed that the set of 28 M. maximus accessions contained 2 accessions with high nutritional quality and competitive biomass production. Heterogeneity of the collection in nutritional and agronomic assessments supports plant-breeding and offers alternatives for cattle producers in the tropics.
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- 2023
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128. La prevención de enfermedades, accidentes laborales y daños al medio ambiente en el sector empresarial
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Francisco Bermúdez Laguna and Rolando Borrero Rivero
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prevención de enfermedades, accidentes laborales, medio ambiente. ,Education - Abstract
El recurso humano y su relación con el medio ambiente, constituyen clave esencial para el exitoso desempeño y operatividad de cualquier organización. Su protección y seguridad integral en la actividad productiva es tarea obligatoria que debe ser brindada por la gerencia encargada de ello, sea cual fuese su naturaleza. A la vez, atender la protección del medio ambiente en su entorno en lo que depende de su objeto social y su misión, que conlleven a la prevención de enfermedades profesionales y accidentes laborales en un ambiente de trabajo seguro, responsabilidad que atiende la seguridad y salud en el trabajo. El presente artículo se desarrolla con el objetivo de contribuir a resolver insuficiencias presentes en organizaciones en estos temas. Entre sus resultados está, además de los fundamentos teóricos utilizados, las acciones que se proponen que responden a las insuficiencias más frecuentes de prevención y protección, y pueden ser útiles a las organizaciones empresariales, docentes, investigadores y estudiantes de universidades.
- Published
- 2023
129. Hybrid Modular Multilevel Converters for High-AC/Low-DC Medium-Voltage Applications
- Author
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Jayesh Kumar Motwani, Jian Liu, Rolando Burgos, Zhi Zhou, and Dong Dong
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Hybrid modular multilevel converters ,modular multilevel converters ,medium voltage converter ,electric vehicle chargers ,energy storage systems ,solid state transformer ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 - Abstract
With ever-increasing power-density requirements, technologies such as energy storage systems and electric-vehicles can benefit greatly from interfacing medium-voltage (MV)-AC grid like 13.8kV or 30kV using high-AC/low-DC voltage converter. Using modular high-AC/low-DC voltage converter can help increase power-density and efficiency, while reducing total conversion steps and providing flexibility. Full-bridge modular multilevel converters (FB-MMC) and solid-state transformers are existing solutions for such operations, but suffer from limitations of high semiconductor requirements, large submodule capacitors and/or many high-frequency transformers. Three new hybrid-MMC (HMMC) topologies are proposed in this paper as alternative solutions for such high-AC/low-DC voltage operations. Each of the three developed HMMCs utilizes a unique combination of low-frequency high-voltage switches and fast-switching low-voltage switch based submodules to generate multilevel-AC voltage. HMMCs are compared extensively to state-of-the-art FB-MMC and are shown to have semiconductor savings of over 27%, 38% lower submodule capacitor size, and 53% lower losses for 13.8-kV-AC/6-kV-DC operation. Due to these benefits like higher efficiency, significantly smaller submodule capacitance requirements, and fewer semiconductors, HMMCs can be an excellent option for high-AC/low-DC applications. Practical considerations like snubber and DC split-capacitor requirement are also elaborated for developing and commercializing HMMCs. Comparison results are verified using a 17.5 kW three-phase MV laboratory prototype.
- Published
- 2023
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130. Multivariate Predictive Modelling of Mathematics Semestral Grade via Bayesian Networks Machine Learning Algorithm
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Norie Neil Acosta, Christian Kalki Lamadrid, and Rolando Barrameda
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Computer engineering. Computer hardware ,TK7885-7895 ,Information technology ,T58.5-58.64 ,Science ,Electronic computers. Computer science ,QA75.5-76.95 - Published
- 2023
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131. ZVS Turn-on Triangular Current Mode (TCM) Control for Three-Phase Two-Level Converters With Reactive Power Control
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Nidhi Haryani, Sung Jae Ohn, and Rolando Burgos
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Active + Reactive Power ,Critical Conduction Mode (CRM) ,Discontinuous Conduction Mode (DCM) ,Sinusoidal Input Current Control (S.I.C.C) ,Sinusoidal Input Current ,Six-switch three-phase two-level converter ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 - Abstract
High switching frequency operation in power converters leads to a significant reduction in size at the cost of increased switching losses. Thus, soft switching techniques become necessary to reduce the losses. WBG devices have the benefit of low turn-off losses, but the turn-on losses are still significant. Triangular Current Mode (TCM) control can achieve zero voltage switching (ZVS) turn-on without adding extra resonant components or active devices to the converter. For three-phase operation, soft switching, sinusoidal currents, and phase synchronization are achieved by operating the phases in a combination of Discontinuous Conduction Mode (DCM), TCM and clamped mode. This method is extended to reactive power cases in this article. The proposed scheme can achieve full ZVS turn-on for all the three phases. The phases still operate in a combination of DCM+TCM+Clamped modes of operation. The proposed algorithms are tested and validated on a GaN converter, achieving 99% efficiency at 700 VA with a power density of 110 W/in3.
- Published
- 2023
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132. Implementación de una metodología para la identificación de la deforestación en el sector de Matahuayo-Tahuayo (Loreto), usando imágenes de los sensores TM, ETM+ y OLI en el período 2007-2015
- Author
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Michel Choccña, Joel Rojas, Jhon Guerrero, and Rolando Badaracco
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Deforestación, bosques amazónicos, Landsat, índices biofísicos, Tasseled Cap, PCA ,Physics ,QC1-999 - Abstract
En este proyecto se implementa una metodología para la identificación de la deforestación en el sector de Matahuayo-Tahuayo. Esta metodología es un resumen de la tesis de Licenciatura de [1] que nace del problema de la expansión de la deforestación de los bosques tropicales en Perú, por ello el objetivo de este estudio es implementar una metodología para detectar y cuantificar las áreas deforestadas en el sector de Matahuayo-Tahuayo, departamento de Loreto. Se emplearon 36 datos imágenes Landsat 5, 7 y 8 de nivel L1T para el tiempo 2007 - 2015 con resolución espacial de 30 m × 30 m. La metodología implementada, consiste en tres fases: (i) La etapa del preprocesamiento se desarrolló la corrección radiométrica, se calculó la reflectancia TOA y corrección atmosférica para obtener la reflectancia de la superficie del suelo. (ii) En el procesamiento se produjeron mapas de distribución espacial y temporal a partir de distintos índices biofísicos (NDVI, RVI) y transformaciones (Tasseled Cap, PCA) que constituyen el compuesto de 18 bandas sintéticas y mediante la separabilidad espectral seleccionamos las bandas sintéticas que se emplean como insumos en la clasificación no supervisada K-means. (iii) En el post procesamiento se generaron los contornos de las zonas deforestadas para cada año de estudio. A partir de los resultados obtenidos se puede indicar una reducción de extensas zonas de bosques amazónicos en el sector de estudio para el período 2007-2015. La deforestación obtenida en hectáreas por año presenta una tendencia lineal ascendente de [9635] ha/año.
- Published
- 2023
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133. Evaluation of the humoral and mucosal immune response of a multiepitope vaccine against COVID-19 in pigs
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Juan Mosqueda, Diego Josimar Hernández-Silva, Marco Antonio Vega-López, Lineth J. Vega-Rojas, Rolando Beltrán, Andrés Velasco-Elizondo, María del Carmen Ramírez-Estudillo, Mario Fragoso-Saavedra, Chyntia Pérez-Almeida, Jesús Hernández, Edgar A. Melgoza-González, Diana Hinojosa-Trujillo, Miguel Ángel Mercado-Uriostegui, Alma Susana Mejía-López, Carlos Rivera-Ballesteros, and Teresa García-Gasca
- Subjects
COVID-19 ,recombinant protein ,multiepitopic vaccine ,SARS-CoV-2 ,humoral response ,mucosal immunity ,Immunologic diseases. Allergy ,RC581-607 - Abstract
IntroductionThis study evaluated the immune response to a multiepitope recombinant chimeric protein (CHIVAX) containing B- and T-cell epitopes of the SARS-CoV-2 spike’s receptor binding domain (RBD) in a translational porcine model for pre-clinical studies.MethodsWe generated a multiepitope recombinant protein engineered to include six coding conserved epitopes from the RBD domain of the SARS-CoV-2 S protein. Pigs were divided into groups and immunized with different doses of the protein, with serum samples collected over time to determine antibody responses by indirect ELISA and antibody titration. Peptide recognition was also analyzed by Western blotting. A surrogate neutralization assay with recombinant ACE2 and RBDs was performed. Intranasal doses of the immunogen were also prepared and tested on Vietnamese minipigs.ResultsWhen the immunogen was administered subcutaneously, it induced specific IgG antibodies in pigs, and higher doses correlated with higher antibody levels. Antibodies from immunized pigs recognized individual peptides in the multiepitope vaccine and inhibited RBD-ACE2 binding for five variants of concern (VOC). Comparative antigen delivery methods showed that both, subcutaneous and combined subcutaneous/intranasal approaches, induced specific IgG and IgA antibodies, with the subcutaneous approach having superior neutralizing activity. CHIVAX elicited systemic immunity, evidenced by specific IgG antibodies in the serum, and local mucosal immunity, indicated by IgA antibodies in saliva, nasal, and bronchoalveolar lavage secretions. Importantly, these antibodies demonstrated neutralizing activity against SARS-CoV-2 in vitro.DiscussionThe elicited antibodies recognized individual epitopes on the chimeric protein and demonstrated the capacity to block RBD-ACE2 binding of the ancestral SARS-CoV-2 strain and four VOCs. The findings provide proof of concept for using multiepitope recombinant antigens and a combined immunization protocol to induce a neutralizing immune response against SARS-CoV-2 in the pig translational model for preclinical studies.
- Published
- 2023
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134. Nuevos factores de riesgo cardiovascular en el adulto mayor
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Naifi Hierrezuelo Rojas Rojas, German Del Rio Caballero, Alfredo Hernández Magdariaga, and Rolando Bonal Ruiz
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adulto mayor ,enfermedades cardiovasculares ,factores de riesgo ,mortalidad. ,Medicine ,Medicine (General) ,R5-920 - Abstract
Introducción: Se han explorado los posibles predictores no tradicionales de enfermedades cardiovasculares en personas mayores. Objetivo: Identificar los factores de riesgo no tradicionales de mortalidad por enfermedades cardiovasculares en adultos mayores. Métodos: Se realizó un estudio analítico de tipo casos y controles en pacientes adultos mayores pertenecientes a 3 áreas de salud del municipio Santiago de Cuba, durante el año 2021. Los casos fueron pacientes fallecidos por enfermedad cardiovascular de tipo ateroesclerótica y los controles, pacientes adultos mayores vivos, sin la enfermedad. Se determinó la razón de productos cruzados (OR), el intervalo de confianza (IC) y la prueba ji cuadrado para identificar los factores de riesgo que se asociaron a la mortalidad. Resultados: La fragilidad (OR= 3,380; IC: 2,476-4,615; p= 0,000) y el deterioro cognitivo (OR= 2,731; IC: 2,006-3,717; p= 0,000] mostraron asociación estadística muy significativa con la mortalidad; los pacientes con 3 o más factores de riesgo presentaron un mayor riesgo de mortalidad (OR= 4,683). Conclusiones: La fragilidad y la multimorbilidad son nuevos predictores de mortalidad por enfermedades cardiovasculares en adultos mayores, que cuando se asocian, implican mayor riesgo.
- Published
- 2023
135. Teorías cognitivas sobre toma de decisiones: entre la razón, las emociones y el contexto social
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Pablo Chaverri Chaverri Chaves and Rolando Barrantes Pereira
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Social sciences (General) ,H1-99 - Abstract
Este artículo realiza una exploración general por algunas de las teorías de la toma de decisiones más destacadas en el ámbito sociocognitivo, con el propósito de aportar análisis que sirva para clarificar las características de la toma de decisiones y la forma en que diversos elementos influyen en ellas Para ello, se inicia contextualizando la teoría sobre toma de decisiones, luego se describen tres teorías al respecto: la teoría racional, la teoría acotada y la teoría ecológica. Seguidamente se revisa la forma en que la condición socioeconómica, la cultura, la crianza, la razón y la emoción influyen en las decisiones. Finalmente, se cierra con una discusión sobre la racionalidad y el potencial de la teoría ecológica para guiar decisiones públicas, así como una conclusión reflexiva.
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- 2023
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136. Characterizing opioid agonist therapy uptake and factors associated with treatment retention among people with HIV in British Columbia, Canada
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Kiana Yazdani, Katerina Dolguikh, Monica Ye, Jason Trigg, Ronald Joe, Scott D. Emerson, Julio S.G. Montaner, Rolando Barrios, and Kate Salters
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Opioid agonist therapy ,Opioid use disorder ,Treatment retention ,HIV ,AIDS ,Administrative health data ,Medicine - Abstract
Accidental overdoses are now the leading cause of death among people with HIV (PWH) in British Columbia (BC). We examined the utilization and retention of opioid agonist therapy (OAT).Adult PWH (≥19 years) with ≥ 1 OAT dispensation in BC between 2008 and 2020 were included (n = 1,515). OAT treatment episodes were formed based on specific criteria for slow-release oral morphine (SROM), methadone, injectable OAT (iOAT), and buprenorphine/naloxone. Retention in treatment was defined as any episode lasting ≥ 12 months. Logistic regression with generalized estimating equations modeled retention-associated factors.There was a 56.6% decline in OAT retention over time. Buprenorphine treatment exhibited significantly lower odds of retention (OR: 0.58; 95% CI: 0.36–0.92) compared to methadone. Conversely, no significant change in retention odds was observed for SROM (0.72; 0.33–1.54) and iOAT (0.81; 0.31–2.12). Factors associated with increased odds of retention included a 10-year increase in age (1.69; 1.46–1.95), previous retention history (1.96; 1.40–2.73), achieving OAT therapeutic dose (8.22; 6.67–10.14), and suppressed HIV viral load (1.35; 1.10–1.67). Individuals with a lifetime HCV diagnosis receiving iOAT were more likely to retain (3.61; 1.20–10.83). Each additional year on OAT during the study period was associated with a 4% increase in the odds of retention.A significant proportion of PWH had a history of OAT prescribing but experienced low retention rates. Retention outcomes were more positive for SROM and iOAT. The association between OAT medication type and retention odds may be particularly influenced by HCV diagnosis. Optimal management of opioid use disorder among PWH, with an emphasis on attaining the therapeutic dose is crucial.
- Published
- 2023
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137. Functional and Molecular Analysis of Human Osteoarthritic Chondrocytes Treated with Bone Marrow-Derived MSC-EVs
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Annachiara Scalzone, Clara Sanjurjo-Rodríguez, Rolando Berlinguer-Palmini, Anne M. Dickinson, Elena Jones, Xiao-Nong Wang, and Rachel E. Crossland
- Subjects
extracellular vesicles ,mesenchymal stromal cell ,chondrocyte ,osteoarthritis ,regenerative medicine ,Technology ,Biology (General) ,QH301-705.5 - Abstract
Osteoarthritis (OA) is a degenerative joint disease, causing impaired mobility. There are currently no effective therapies other than palliative treatment. Mesenchymal stromal cells (MSCs) and their secreted extracellular vesicles (MSC-EVs) have shown promise in attenuating OA progression, promoting chondral regeneration, and modulating joint inflammation. However, the precise molecular mechanism of action driving their beneficial effects has not been fully elucidated. In this study, we analyzed MSC-EV-treated human OA chondrocytes (OACs) to assess viability, proliferation, migration, cytokine and catabolic protein expression, and microRNA and mRNA profiles. We observed that MSC-EV-treated OACs displayed increased metabolic activity, proliferation, and migration compared to the controls. They produced decreased proinflammatory (Il-8 and IFN-γ) and increased anti-inflammatory (IL-13) cytokines, and lower levels of MMP13 protein coupled with reduced expression of MMP13 mRNA, as well as negative microRNA regulators of chondrogenesis (miR-145-5p and miR-21-5p). In 3D models, MSC-EV-treated OACs exhibited enhanced chondrogenesis-promoting features (elevated sGAG, ACAN, and aggrecan). MSC-EV treatment also reversed the pathological impact of IL-1β on chondrogenic gene expression and extracellular matrix component (ECM) production. Finally, MSC-EV-treated OACs demonstrated the enhanced expression of genes associated with cartilage function, collagen biosynthesis, and ECM organization and exhibited a signature of 24 differentially expressed microRNAs, associated with chondrogenesis-associated pathways and ECM interactions. In conclusion, our data provide new insights on the potential mechanism of action of MSC-EVs as a treatment option for early-stage OA, including transcriptomic analysis of MSC-EV-treated OA, which may pave the way for more targeted novel therapeutics.
- Published
- 2024
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138. Antilipolytic and antilipogenic effects of the CPT-1b inhibitor oxfenicine in the white adipose tissue of rats
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Arta Mohasses, Michelle V. Wu, Abinas Uthayakumar, Rolando B. Ceddia, and Diane M Sepa-Kishi
- Subjects
0301 basic medicine ,Male ,medicine.medical_specialty ,Physiology ,medicine.medical_treatment ,Adipose Tissue, White ,Lipolysis ,Glycine ,Adipose tissue ,030209 endocrinology & metabolism ,White adipose tissue ,Rats, Sprague-Dawley ,03 medical and health sciences ,0302 clinical medicine ,Insulin resistance ,Physiology (medical) ,Internal medicine ,medicine ,Animals ,Carnitine O-palmitoyltransferase ,Enzyme Inhibitors ,Beta oxidation ,Adiposity ,Carnitine O-Palmitoyltransferase ,business.industry ,Insulin ,Lipogenesis ,medicine.disease ,Rats ,Obesity, Diabetes and Energy Homeostasis ,030104 developmental biology ,Endocrinology ,business - Abstract
Oxfenicine is a carnitine-palmitoyl transferase 1b (CPT-1b)-specific inhibitor that has been shown to improve whole body insulin sensitivity while suppressing fatty acid (FA) oxidation and increasing circulating FA. Because the white adipose tissue (WAT) is an organ that stores and releases FAs, this study investigated whether oxfenicine-induced inhibition of FA oxidation affected adiposity and WAT metabolism in rats fed either low (LF) or high-fat (HF) diets. Following 8 wk of dietary intervention, male Sprague-Dawley rats were given a daily intraperitoneal injection of oxfenicine (150 mg/kg body wt) or vehicle (PBS) for 3 wk. Oxfenicine treatment reduced whole body fat oxidation, body weight, and adiposity, and improved insulin sensitivity in HF-fed rats. All of these effects occurred without alterations in food intake, energy expenditure, and ambulatory activity. In vivo oxfenicine treatment reduced FA oxidation and lipolysis in subcutaneous inguinal (SC Ing) adipocytes, whereas glucose incorporation into lipids (lipogenesis) was significantly reduced in both SC Ing and epididymal (Epid) adipocytes. In summary, our results show that oxfenicine-induced inhibition of CPT-1b markedly affects WAT metabolism, leading to reduced adiposity through a mechanism that involves reduced lipogenesis in the SC Ing and Epid fat depots of rats.
- Published
- 2016
139. Chronic AICAR-induced AMP-kinase activation regulates adipocyte lipolysis in a time-dependent and fat depot-specific manner in rats
- Author
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Rolando B. Ceddia, Mandeep Pinky Gaidhu, and George Bikopoulos
- Subjects
Male ,Perilipin-1 ,medicine.medical_specialty ,Physiology ,Lipolysis ,Adenylate kinase ,Adipose tissue ,Fatty Acids, Nonesterified ,Biology ,chemistry.chemical_compound ,Catecholamines ,In vivo ,Internal medicine ,Adipocyte ,Adipocytes ,medicine ,Animals ,Hypoglycemic Agents ,Phosphorylation ,Rats, Wistar ,Adenylate Kinase ,AMPK ,Articles ,Lipase ,Cell Biology ,Ribonucleotides ,Aminoimidazole Carboxamide ,Phosphoproteins ,Rats ,Endocrinology ,Adipose Tissue ,chemistry ,Perilipin ,Carrier Proteins - Abstract
This study investigated the effects of chronic in vivo AMP-kinase activation with 5-aminoimidazole-4-carboxamide-1-β-d-ribofuranoside (AICAR) on lipolysis in subcutaneous inguinal, epididymal, and retroperitoneal fat pads. Male Wistar rats received daily single intraperitoneal injections of either saline or AICAR (0.7 g/kg body wt) for a period of 8 wk. The fat pads were used either to isolate adipocytes and measure basal and catecholamine-stimulated lipolysis or to assess signaling steps of lipolysis after 4 and 8 wk of AICAR treatment. Blood was sampled weekly to measure nonesterified fatty acids (NEFAs). AICAR treatment reduced basal and catecholamine-stimulated lipolysis at week 4 in adipocytes from all fat depots. However, at week 8, catecholamine-induced lipolysis significantly increased in inguinal and retroperitoneal adipocytes. Interestingly, plasma levels of NEFAs were also decreased and subsequently increased at 4 and 8 wk, respectively. The lipolytic cascade of the inguinal fat pad was the most drastically affected by the treatment, since the phosphorylation and content of most proteins involved in lipolysis were consistently undetected in this tissue after 4 and 8 wk of AICAR treatment. The enhancement of catecholamine-induced lipolysis in inguinal and retroperitoneal adipocytes after 8 wk of AICAR treatment was accompanied by increased contents of adipose triglyceride lipase (ATGL) and perilipin A in these fat depots. In summary, despite depot-specific regulation of the lipolytic cascade, catecholamine-induced lipolysis in isolated adipocytes correlated well with plasma NEFA concentrations in the course of chronic AICAR-induced AMPK activation. The mechanisms underlying these effects also involved time-dependent and depot-specific regulation of hormone-sensitive lipase, ATGL, and perilipin.
- Published
- 2012
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140. Positioning positions in the Writing to the Future
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Rolando B. Tolentino
- Subjects
Cultural Studies ,History ,Politics ,Literature and Literary Theory ,Visual Arts and Performing Arts ,State (polity) ,media_common.quotation_subject ,Production (economics) ,Sociology ,Social science ,Subaltern ,Epistemology ,media_common - Abstract
The article maps out a political place for positions based on the idea of “writing to the future” or a political wager on the future precisely because of the valences of failure in the present. Using Alain Badiou's idea of truth and the state, and citing the conditions in the Philippines, the academic discourse has shifted from critique of to collaboration with the state. The article then draws from the cultural production of independent digital cinema—representing the most abject of subaltern identities and conditions—to show the limits and possibilities of wagering on the future.
- Published
- 2012
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141. Nutrient Responsive Nesfatin-1 Regulates Energy Balance and Induces Glucose-Stimulated Insulin Secretion in Rats
- Author
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Robert G. Tsushima, X. Gao, M. P. Gaidhu, Robert L. S. Perry, Rolando B. Ceddia, R. Gonzalez, and Suraj Unniappan
- Subjects
Male ,medicine.medical_specialty ,medicine.medical_treatment ,Glucose uptake ,Molecular Sequence Data ,Nerve Tissue Proteins ,Carbohydrate metabolism ,Endocrinology ,Internal medicine ,Insulin Secretion ,Brown adipose tissue ,medicine ,Animals ,Insulin ,Nucleobindins ,Glucose homeostasis ,Amino Acid Sequence ,Phosphorylation ,Glucose tolerance test ,biology ,medicine.diagnostic_test ,Pancreatic islets ,Calcium-Binding Proteins ,Glucose Tolerance Test ,Rats, Inbred F344 ,Rats ,DNA-Binding Proteins ,Insulin receptor ,Glucose ,medicine.anatomical_structure ,biology.protein ,Energy Metabolism ,Proto-Oncogene Proteins c-akt - Abstract
Nesfatin-1 is a recently discovered anorexigen, and we first reported nesfatin-like immunoreactivity in the pancreatic β-cells. The aim of this study was to characterize the effects of nesfatin-1 on whole-body energy homeostasis, insulin secretion, and glycemia. The in vivo effects of continuous peripheral delivery of nesfatin-1 using osmotic minipumps on food intake and substrate partitioning were examined in ad libitum-fed male Fischer 344 rats. The effects of nesfatin-1 on glucose-stimulated insulin secretion (GSIS) were examined in isolated pancreatic islets. L6 skeletal muscle cells and isolated rat adipocytes were used to assess the effects of nesfatin-1 on basal and insulin-mediated glucose uptake as well as on major steps of insulin signaling in these cells. Nesfatin-1 reduced cumulative food intake and increased spontaneous physical activity, whole-body fat oxidation, and carnitine palmitoyltransferase I mRNA expression in brown adipose tissue but did not affect uncoupling protein 1 mRNA in the brown adipose tissue. Nesfatin-1 significantly enhanced GSIS in vivo during an oral glucose tolerance test and improved insulin sensitivity. Although insulin-stimulated glucose uptake in L6 muscle cells was inhibited by nesfatin-1 pretreatment, basal and insulin-induced glucose uptake in adipocytes from nesfatin-1-treated rats was significantly increased. In agreement with our in vivo results, nesfatin-1 enhanced GSIS from isolated pancreatic islets at both normal (5.6 mm) and high (16.7 mm), but not at low (2 mm), glucose concentrations. Furthermore, nesfatin-1/nucleobindin 2 release from rat pancreatic islets was stimulated by glucose. Collectively, our data indicate that glucose-responsive nesfatin-1 regulates insulin secretion, glucose homeostasis, and whole-body energy balance in rats.
- Published
- 2011
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142. Guest Editor's Introduction
- Author
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Rolando B. Tolentino
- Subjects
Cultural Studies ,History ,Literature and Literary Theory ,Visual Arts and Performing Arts - Published
- 2011
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143. The Role of Adenosine Monophosphate Kinase in Remodeling White Adipose Tissue Metabolism
- Author
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Mandeep Pinky Gaidhu and Rolando B. Ceddia
- Subjects
Adenosine monophosphate ,medicine.medical_specialty ,Adipose Tissue, White ,Adipose tissue ,Physical Therapy, Sports Therapy and Rehabilitation ,White adipose tissue ,Carbohydrate metabolism ,chemistry.chemical_compound ,Enzyme activator ,Internal medicine ,Adipocyte ,medicine ,Animals ,Orthopedics and Sports Medicine ,Obesity ,Adenosine Kinase ,Kinase ,Phosphotransferases ,Lipid metabolism ,Lipid Metabolism ,Adenosine Monophosphate ,Enzyme Activation ,Glucose ,Endocrinology ,chemistry ,Biochemistry ,Energy Metabolism - Abstract
Recent evidence indicates that the enzyme adenosine monophosphate (AMP) kinase exerts important fat-reducing effects in the adipose tissue, which has created great interest in this enzyme as a potential target for obesity treatment. This review summarizes our findings that chronic AMP kinase activation remodels adipocyte glucose and lipid metabolism and enhances the ability of adipose tissue to dissipate energy within itself and reduce adiposity.
- Published
- 2011
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144. Estrategia de intervención para modificar factores de riesgo del Cáncer de Pulmón desde el área de salud
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Alexander Pérez Varona, Yaima Borrero Carmenate, and Rolando Borrero Rivero
- Subjects
estrategia de intervención, cáncer de pulmón, factores de riesgo. ,Education - Abstract
El cáncer de pulmón es una de las enfermedades más graves y una de los de mayor incidencia en el ser humano. En el presente artículo se propone presentar los resultados sobre el conocimiento y evaluación de la efectividad de una estrategia de intervención sobre conocimientos de factores de riesgo del cáncer de pulmón en pacientes con riesgos del Consultorio No 32 perteneciente al área de salud del Policlínico Docente Universitario Manuel Fajardo Rivero, Las Tunas, en el período comprendido entre octubre 2019 a junio del 2022. Como metodología se realizó un estudio observacional cuasi-experimental antes-después sin grupo de control. El universo de estudio estuvo constituido por 77 pacientes con riesgo y la muestra por 56 de ellos que recibieron una estrategia de intervención organizada en tres etapas. La información se aplicó un cuestionario sobre el nivel de conocimiento sobre este cáncer que poseen los pacientes. Los resultados arrojaron que el rango de edad más prevalente fue entre 21 a 25 años en el sexo masculino. El diagnóstico reveló que la mayor parte de los pacientes mostraron información insuficiente en todos los aspectos encuestados, de forma general prevaleció el bajo nivel cognitivo. Se demostró que, después de aplicado el programa educativo la mayoría de los pacientes lograron conocimientos suficientes sobre la temática, de lo que se concluye que la estrategia de intervención fue efectiva y se logró el objetivo propuesto.
- Published
- 2022
145. Methodology for the treatment of content on climate change in the Physics discipline
- Author
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Eduardo Felipe Domínguez Nápoles, Rolando Borrero Rivero, and Víctor Manuel Cortina Bober
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cambio climático ,contenido ,cultura medioambiental ,disciplina física ,proceso de enseñanza aprendizaje. ,Education (General) ,L7-991 ,Special aspects of education ,LC8-6691 - Abstract
Raising the perception of risk, increasing the level of knowledge and the degree of participation of the university community in confronting climate change is a priority for the Cuban University. The objective of the research was to present a methodology for the treatment of the content on climate change in the Physics discipline in the Agronomy career that is characterized by being systemic, integrating, flexible, developing and generalizing that allows integrating the contents of the discipline the bases of climate change in the teaching-learning process. The methods used were the following: criticism and source analysis, critical opinion and collective construction workshop, observation, documentary review and interview. The article refers to the stages in which the methodology and procedures that teachers must undertake to treat the contents on climate change and the appropriation by students of an environmental culture are structured. It is concluded that the methodology has demonstrated its effectiveness in practice, while transformations are observed in the way of acting of those involved to face and mitigate the effects of climate change. The research is part of the project Training of the University Professional for the Management of Local and Sustainable Development of the Las Tunas territory attached to the Faculty of Economic Sciences of the University of Las Tunas.
- Published
- 2022
146. Validación de un instrumento para el diagnóstico de estrategias institucionales de enfrentamiento al cambio climático
- Author
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Luis Carlos Fernández Cobas, Rolando Borrero Rivero, and Miriam Gladys Vega Marín
- Subjects
validación, estrategias institucionales, enfrentamiento al cambio climático. ,Education - Abstract
El Plan de Estado para el enfrentamiento al cambio climático en Cuba, concibe como uno de sus propósitos, afianzar una nación más preparada para aportar una propuesta integral a partir de la primera identificación de zonas y lugares priorizados, sus afectaciones y las acciones a acometer. En el presente artículo científico se exponen los resultados del proceso de validación de un instrumento para el diagnóstico de estrategias institucionales de enfrentamiento al cambio climático. El estudio realizado se corresponde con la tipología de validez de contenido, el cual se corresponde con una metodología de corte descriptivo e interpretativo. El estudio desplegado posibilita sostener que el instrumento elaborado es pertinente y tiene relevancia para diagnosticar las estrategias institucionales de enfrentamiento al cambio climático, teniendo como base el juicio de expertos, el cual fue realizado por docentes investigadores con una alta experiencia en la temática sometida a su consideración. Puede ser significativo efectuar un estudio científico similar para someter al análisis la medición de la confiabilidad del cuestionario elaborado, así como resultaría conveniente que el presente instrumento, sea aplicado en fase piloto, para proceder a la realización de los ajustes necesarios.
- Published
- 2022
147. Disruption of AMPKα1 Signaling Prevents AICAR-Induced Inhibition of AS160/TBC1D4 Phosphorylation and Glucose Uptake in Primary Rat Adipocytes
- Author
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Mandeep Pinky Gaidhu, Fawad Noor, Rolando B. Ceddia, and Robert L. S. Perry
- Subjects
Male ,Glucose uptake ,Immunoblotting ,AICA ribonucleotide ,AMP-Activated Protein Kinases ,Biology ,chemistry.chemical_compound ,Endocrinology ,GSK-3 ,Adipocytes ,Animals ,Immunoprecipitation ,Phosphorylation ,Rats, Wistar ,Molecular Biology ,Protein kinase B ,Original Research ,Glucose Transporter Type 4 ,Reverse Transcriptase Polymerase Chain Reaction ,GTPase-Activating Proteins ,Glucose transporter ,AMPK ,Biological Transport ,General Medicine ,Ribonucleotides ,Aminoimidazole Carboxamide ,Rats ,Cell biology ,Protein Transport ,Glucose ,chemistry ,Biochemistry ,Signal transduction ,Signal Transduction - Abstract
The aim of this study was to investigate the molecular mechanisms by which AMP-kinase (AMPK) activation inhibits basal and insulin-stimulated glucose uptake in primary adipocytes. Rat epididymal adipocytes were exposed to 5-aminoimidazole-4-carboxamide-1-beta-d-ribofuranoside (AICAR) for 1 h. Subsequently, basal and insulin-stimulated glucose uptake and the phosphorylation of AMPK, acetyl-CoA carboxylase, Akt, and the Akt substrate of 160 kDa (AS160/TBC1D4) were determined. In order to investigate whether these effects of AICAR were mediated by AMPK activation, these parameters were also assessed in adipocytes either expressing LacZ (control) or a kinase-dead AMPKalpha1 mutant. AICAR increased AMPK activation without affecting basal and insulin-stimulated Akt1/2 phosphorylation on Thr(308) and Ser(473) residues. However, AMPK activation suppressed the phosphorylation of AS160/TBC1D4 and its interaction with the 14-3-3 signal transduction-regulatory protein, which was accompanied by significant reductions in plasma membrane glucose transporter 4 content and glucose uptake under basal and insulin-stimulated conditions. Phosphorylation of Akt substrates glycogen synthase kinase 3alpha and -beta were unaltered by AICAR, indicating that the AMPK-regulatory effects were specific to the AS160/TBC1D4 signaling pathway. Expression of the kinase-dead AMPKalpha1 mutant fully prevented the suppression of AS160/TBC1D4 phosphorylation, plasma membrane glucose transporter 4 content, and the inhibitory effect of AICAR-induced AMPK activation on basal and insulin-stimulated glucose uptake. This study is the first to provide evidence that disruption of AMPKalpha1 signaling prevents the suppressive effects of AMPK activation on AS160/TBC1D4 phosphorylation and glucose uptake, indicating that insulin-signaling steps that are common to white adipose tissue and skeletal muscle regulation of glucose uptake are distinctly affected by AMPK activation.
- Published
- 2010
- Full Text
- View/download PDF
148. Remodeling glucose and lipid metabolism through AMPK activation: relevance for treating obesity and Type 2 diabetes
- Author
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Rolando B. Ceddia and Mandeep Pinky Gaidhu
- Subjects
medicine.medical_specialty ,business.industry ,Endocrinology, Diabetes and Metabolism ,Adipose tissue ,AMPK ,Lipid metabolism ,Type 2 diabetes ,medicine.disease ,Endocrinology ,Lipotoxicity ,Internal medicine ,Heterotrimeric G protein ,medicine ,Cardiology and Cardiovascular Medicine ,Protein kinase A ,business ,Beta oxidation - Abstract
In recent years, AMP-activated protein kinase (AMPK) has emerged as a potential target for physiological and pharmacologic treatment of several metabolic disorders. AMPK is a heterotrimeric enzyme that has been proposed to function as a ‘fuel gauge’ that monitors changes in the energy status of cells. One pathway that is central to the integrated effects of AMPK in peripheral tissues is the stimulation of fatty acid oxidation and prevention of intracellular lipid accumulation, which could exert an important antilipotoxic effect and be of great relevance for the treatment of obesity and Type 2 diabetes. Here, we review the recent advances in the physiological role of AMPK in the regulation of lipid metabolism in peripheral tissues, and the molecular mechanisms involved in these processes. Furthermore, we focus on the relevance of AMPK activation in regulating lipid homeostasis in metabolic diseases, such as obesity and Type 2 diabetes.
- Published
- 2009
- Full Text
- View/download PDF
149. Regulation of Visceral and Subcutaneous Adipocyte Lipolysis by Acute AICAR-induced AMPK Activation
- Author
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Rolando B. Ceddia, Mandeep Pinky Gaidhu, and Nicole M. Anthony
- Subjects
Male ,medicine.medical_specialty ,Epinephrine ,Intra-Abdominal Fat ,Lipolysis ,Endocrinology, Diabetes and Metabolism ,Subcutaneous Fat ,Medicine (miscellaneous) ,AMP-Activated Protein Kinases ,chemistry.chemical_compound ,Endocrinology ,AMP-activated protein kinase ,Adipocyte ,Internal medicine ,Adipocytes ,medicine ,Animals ,Hypoglycemic Agents ,Enzyme Inhibitors ,Phosphorylation ,Rats, Wistar ,Protein kinase A ,Nutrition and Dietetics ,biology ,Acetyl-CoA carboxylase ,AMPK ,Ribonucleotides ,Sterol Esterase ,Aminoimidazole Carboxamide ,Rats ,Pyrimidines ,chemistry ,biology.protein ,Pyrazoles ,Acetyl-CoA Carboxylase - Abstract
This study investigated the role of adenosine monophosphate-activated protein kinase (AMPK) in the regulation of lipolysis in visceral (VC) and subcutaneous (SC) rat adipocytes and the molecular mechanisms involved in this process. VC (epididymal and retroperitoneal) and SC (inguinal) adipocytes were isolated from male Wistar rats (160-180 g). Adipocytes were incubated either in the absence or in the presence of the AMPK agonist 5-aminoimidazole-4-carboxamide-1-beta-d-ribofuranoside (AICAR, 0-500 micromol/l). AMPK and acetyl-CoA carboxylase (ACC) phosphorylation, basal and epinephrine-stimulated (100 nmol/l) glycerol release, and hormone-sensitive lipase (HSL) phosphorylation and activity were determined. AICAR-induced (500 micromol/l) AMPK activation inhibited basal glycerol release by approximately 42, 41, and 44% in epididymal, retroperitoneal, and inguinal adipocytes, respectively. Epinephrine-stimulated glycerol release was almost completely prevented by AICAR treatment in adipocytes from all fat depots. The AMPK inhibitor compound C (20 micromol/l) prevented AICAR-induced phosphorylation of AMPK and significantly increased basal (approximately 1.3-, 1.4-, and 1.7-fold) and epinephrine-stimulated (approximately 1.3-, 1.2-, 1.4-fold) glycerol release in epididymal, retroperitoneal, and inguinal adipocytes, respectively. AICAR increased phosphorylation of HSL(Ser565) and inhibited epinephrine-induced phosphorylation of HSL(Ser563) and HSL(Ser660). This was also accompanied by a 73% reduction in epinephrine-stimulated HSL activity. Compound C prevented the phosphorylation of HSL(Ser565) induced by AICAR and partially prevented the inhibitory effect of this drug on basal and epinephrine-stimulated lipolysis in adipocytes in VC and SC fat depots. In summary, despite different fat depots eliciting distinct rates of lipolysis, acute AICAR-induced AMPK activation suppressed HSL phosphorylation/activation and exerted similar antilipolytic effects on both VC and SC adipocytes.
- Published
- 2009
- Full Text
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150. Macho Dancing, the Feminization of Labor, and Neoliberalism in the Philippines
- Author
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Rolando B. Tolentino
- Subjects
Literature and Literary Theory ,Visual Arts and Performing Arts ,Multinational corporation ,Neoliberalism (international relations) ,Feminization (sociology) ,Cultural politics ,Gender studies ,Sociology ,Capitalism ,Dictatorship - Abstract
Macho dancing in the gay bars of the Philippines is performed by male heterosexual dancers and is a symptom of the discursive cultural politics of the Philippines in transition from the Marcos dictatorship to today's multinational capitalism. The macho dancer's body can also be read as representing actual shifts in the cultural politics of the Filipino nation-state.
- Published
- 2009
- Full Text
- View/download PDF
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