11 results on '"M Piazuelo"'
Search Results
2. The dicarbonyl electrophile scavenger 2-hydroxybenzylamine (2-HOBA) prevents colorectal carcinogenesis and reduces tumor growth
- Author
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Alain Gobert, Mohammad Asim, Thaddeus Smith, Kamery Williams, Daniel Barry, Margaret Allaman, Kara McNamara, Caroline Hawkins, Alberto Delgado, Shilin Zhao, M Piazuelo, M Washington, Lori Coburn, John Rathmacher, and Keith Wilson
- Abstract
Background and Purpose: Colorectal cancer (CRC) is a major health problem worldwide. Dicarbonyl electrophiles, such as iso-levuglandins (isoLGs), are generated from lipid peroxidation and form covalent adducts with amine-containing macromolecules. We have shown high levels of adducts of isoLGs in colonic epithelial cells from patients with CRC. We thus investigated the role of these reactive aldehydes on colon cancer development. Experimental Approach: We investigated the effect of oral treatment with 2-hydroxybenzylamine (2-HOBA), a natural compound derived from buckwheat seeds that acts as a potent scavenger of electrophiles, on colon carcinogenesis using the azoxymethane-dextran sulfate sodium model of colitis-associated carcinogenesis and mice with epithelial-specific deletion of the adenomatous polyposis coli gene, as a model of sporadic cancer. We also tested 2-HOBA in a murine xenograft of human HCT116 CRC cells implanted into the flank of nude mice. Key Results: 2-HOBA is bioavailable in the colon of mice after supplementation in the drinking water and does affect the colonic microbiome. However, it reduced the level of isoLG adducts to lysine as well as tumorigenesis in both models of CRC. In parallel, we found that NRF2 activation and signaling was decreased in the colon of 2-HOBA-treated mice. Last, the growth of human tumors is significantly attenuated by 2-HOBA supplementation. Conclusion and Implications: 2-HOBA, which has been shown to be safe in humans, reduces colon tumorigenesis and growth of tumor cells in three distinct models of CRC. Thus, 2-HOBA represents a promising natural compound for the prevention and treatment of CRC.
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- 2023
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3. Loss of TFF1 promotesHelicobacter pylori-induced β-catenin activation and gastric tumorigenesis
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Judith Romero-Gallo, Uma Krishna, Mohammed Soutto, Wael El-Rifai, Blanca M. Piazuelo, Abbes Belkhiri, Richard M. Peek, and Kay Washington
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medicine.medical_specialty ,T cell ,Active Transport, Cell Nucleus ,Down-Regulation ,Adenocarcinoma ,ß-catenin ,Transfection ,medicine.disease_cause ,Helicobacter Infections ,Stomach Neoplasms ,Cell Line, Tumor ,Internal medicine ,medicine ,Animals ,Humans ,RNA, Messenger ,beta Catenin ,Cell Proliferation ,TFF1 ,Mice, Knockout ,Helicobacter pylori ,biology ,business.industry ,Tumor Suppressor Proteins ,gastric cancer ,Stomach ,Cancer ,Hepatology ,medicine.disease ,biology.organism_classification ,Gene Expression Regulation, Neoplastic ,Cell Transformation, Neoplastic ,HEK293 Cells ,medicine.anatomical_structure ,Oncology ,Gastric Mucosa ,Host-Pathogen Interactions ,Cancer cell ,Immunology ,Cancer research ,Trefoil Factor-1 ,Peptides ,Carcinogenesis ,business ,Signal Transduction ,Priority Research Paper - Abstract
// Mohammed Soutto 1, 2 , Judith Romero-Gallo 3 , Uma Krishna 3 , M. Blanca Piazuelo 3 , M. Kay Washington 4 , Abbes Belkhiri 2 , Richard M. Peek Jr 3, 5 , Wael El-Rifai 1, 2, 5 1 Department of Veterans Affairs, Tennessee Valley Healthcare System, Nashville, Tennessee, USA 2 Department of Surgery, Vanderbilt University Medical Center, Nashville, Tennessee, USA 3 Division of Gastroenterology, Hepatology, & Nutrition, Vanderbilt University Medical Center, Nashville, Tennessee, USA 4 Department of Pathology, Microbiology and Immunology, Vanderbilt University Medical Center, Nashville, Tennessee, USA 5 Department of Cancer Biology, Vanderbilt University Medical Center, Nashville, Tennessee, USA Correspondence to: Wael El-Rifai, e-mail: wael.el-rifai@vanderbilt.edu Keywords: TFF1, Helicobacter pylori, s-catenin, gastric cancer Abbreviations: TFF1; trefoil factor 1, H. pylori; Helicobacter pylori, knockout; KO, TCF/LEF; T cell factor/lymphoid Received: February 18, 2015 Accepted: April 14, 2015 Published: April 27, 2015 ABSTRACT Using in vitro and in vivo models, we investigated the role of TFF1 in suppressing H. pylori -mediated activation of oncogenic β-catenin in gastric tumorigenesis. A reconstitution of TFF1 expression in gastric cancer cells decreased H. pylori -induced β-catenin nuclear translocation, as compared to control ( p < 0.001). These cells exhibited significantly lower β-catenin transcriptional activity, measured by pTopFlash reporter, and induction of its target genes ( CCND1 and c-MYC) , as compared to control. Because of the role of AKT in regulating β-catenin, we performed Western blot analysis and demonstrated that TFF1 reconstitution abrogates H. pylori -induced p-AKT (Ser473), p-β-catenin (Ser552), c-MYC, and CCND1 protein levels. For in vivo validation, we utilized the Tff1 -KO gastric neoplasm mouse model. Following infection with PMSS1 H. pylori strain, we detected an increase in the nuclear staining for β-catenin and Ki-67 with a significant induction in the levels of Ccnd1 and c-Myc in the stomach of the Tff1 -KO, as compared to Tff1 -WT mice ( p < 0.05). Only 10% of uninfected Tff1 -KO mice, as opposed to one-third of H. pylori -infected Tff1 -KO mice, developed invasive adenocarcinoma ( p = 0.03). These findings suggest that loss of TFF1 could be a critical step in promoting the H. pylori -mediated oncogenic activation of β-catenin and gastric tumorigenesis.
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- 2015
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4. Loss of Tff1 Promotes Pro-Inflammatory Phenotype with Increase in the Levels of RORγt+ T Lymphocytes and Il-17 in Mouse Gastric Neoplasia
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Mohammed Soutto, Mohamed S. Arredouani, Wael El-Rifai, Blanca M. Piazuelo, Abbes Belkhiri, and Mohamed A. Saleh
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0301 basic medicine ,lymphocytes ,Il-17 ,Chemistry ,Stomach ,T cell ,Immune cells ,Inflammation ,CD8 ,Molecular biology ,gastric cancer ,03 medical and health sciences ,030104 developmental biology ,Immune system ,medicine.anatomical_structure ,Oncology ,Immunology ,medicine ,Gastric mucosa ,Cytotoxic T cell ,Interleukin 17 ,medicine.symptom ,Research Paper ,TFF1 - Abstract
Background: TFF1 deficiency induces a mucosal pro-inflammatory phenotype that contributes to gastric tumorigenesis in mouse and human. Methods: We utilized the Tff1-KO mouse model to assess the impact of TFF1 loss on immune cells infiltration in the stomach. We used single cell suspension, flow cytometry, immunohistochemistry, and quantitative PCR (qPCR) assays. Results: The Tff1-KO gastric mucosa demonstrated high chronic inflammatory scores (score: 3-4) at age 2 months, which exacerbated at age 8 months (score: 4-6). We next used single-cell suspensions for flow cytometry analysis of total leukocytes (CD45+ cells), total T lymphocytes (CD45+CD3+cells), T cell subsets (CD4+, CD8+, and CD3+CD4-CD8-cells), and monocytes/macrophages (CD45+F4/80+cells). The results demonstrated an age-dependent (2 → 8 month age) significant increase of leukocytes (p
- Published
- 2017
5. Evaluation of add-on devices for the prevention of phlebitis and other complications associated with the use of peripheral catheters in hospitalised adults: a randomised controlled study
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S. Rodríguez, J A Martínez, M. Piazuelo, P. Blecua, R. Gallardo, Manuel Almela, Antoni Trilla, M. Robau, and Z. Escalante
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Adult ,Male ,Microbiology (medical) ,medicine.medical_specialty ,Gram-Positive Bacteria ,Lower risk ,Thrombophlebitis ,law.invention ,Hospitals, University ,Catheters, Indwelling ,Pharmacotherapy ,Randomized controlled trial ,law ,Catheterization, Peripheral ,Humans ,Medicine ,Gram-Positive Bacterial Infections ,business.industry ,Vascular disease ,Incidence ,Hazard ratio ,General Medicine ,Middle Aged ,medicine.disease ,Surgery ,Hospitalization ,Catheter ,Treatment Outcome ,Infectious Diseases ,Equipment Contamination ,Female ,Phlebitis ,business ,Complication - Abstract
The aim of this study was to assess the role of add-on devices for the prevention of phlebitis and other complications associated with the use of peripheral catheters. Patients admitted to an infectious diseases ward and requiring the insertion of a peripheral catheter for at least 24h were randomly allocated to be managed with or without add-on devices. Incidence of phlebitis and all complications were the primary outcomes. Extravasation, inadvertent withdrawal, obstruction and rupture were considered to be mechanical complications, and analysis was performed using survival methods. Of 683 evaluated catheters, 351 were allocated to the add-on device arm and 332 to the control arm. Despite randomisation, patients in the add-on device group were older (P=0.048), less likely to have human immunodeficiency virus (P=0.02) and more likely to have received antibiotics (P=0.05). After adjustment for these variables, the hazard ratio for phlebitis remained non-significant (hazard ratio: 0.95; 95% confidence interval: 0.7-1.3), but the risk of mechanical complications became lower in the add-on device arm (0.68; 0.5-0.94). This translated into a trend towards a lower risk of any complication (0.83; 0.67-1.01). The beneficial effect on mechanical or all complications was noticeable after six days of catheterisation. Add-on devices do not reduce the incidence of phlebitis but may prevent mechanical complications. However, the impact of add-on devices on the incidence of all complications is at most small and only apparent after the sixth day of catheter use.
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- 2009
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6. Impact of Hospitalization of People With Dementia or Cognitive Impairment on Family Caregivers.
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Casafont C, González-García MJ, Casadamon-Munarriz I, Piazuelo M, Cobo-Sánchez JL, Bravo M, Frías CE, and Zabalegui A
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- Humans, Caregivers psychology, Activities of Daily Living, Longitudinal Studies, Hospitalization, Dementia, Cognitive Dysfunction
- Abstract
People with dementia (PWD) have a higher risk of hospitalization than people without dementia. Hospitalizations are stressful events for PWD and their caregivers, representing a considerable change to their routines. The current descriptive longitudinal study aimed to identify the positive and negative reactions, experiences related to health and social integrated care, resource use, and work status of family caregivers of PWD or cognitive impairment admitted to the hospital with a proximal femur fracture undergoing surgery. Findings indicated that family caregivers ( N = 174) are fully committed to providing assistance in activities of daily living and supervision, showing positive attitudes on self-esteem and negative attitudes toward lack of family support and impact on finances, schedule, and health. Overall caregiver experiences with integrated health and social care improved after hospitalization but decreased after discharge. One month after hospitalization, family caregivers maintained the same work hours but used fewer health care resources. Hospitalization represents a good opportunity to approach family caregivers and determine their needs to provide them with interventions to minimize their burden and improve their well-being. [ Research in Gerontological Nursing, 16 (6), 283-290.].
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- 2023
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7. mHealth to Improve Experience, Adherence to Pharmacological Treatment, and Positive Mental Health in Patients Diagnosed With Femur Fractures: Protocol for a Quasi-Experimental Study.
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Marcos Anton G, Puig Llobet M, Lluch Canut T, Sanchez Ortega MA, Piazuelo Pont M, and Moreno-Arroyo M
- Abstract
Background: Considering the prognosis of femur fractures worldwide, the ageing of our society, and the problems in adherence to treatment found in these patients, it is believed that mobile health can have a positive impact on the process and quality of care., Objective: We aim to evaluate the effectiveness of a pharmacological educational nurse intervention with Myplan app with regard to knowledge, adherence to pharmacological treatment, and positive mental health of patients with femur fractures., Methods: A nonrandomized, quasi-experimental study will be carried out with a pretest-posttest control group. It will include 278 older patients diagnosed with femur fractures, with a Glasgow Coma Scale of 15 and access to mobile devices. Patients with psychological pathologies and cognitive impairment or patients treated in isolation will be excluded. Study variables are as follows: sociodemographic variables (AdHoc Form), patient experience (Patient Experience Questionnaire-15), adherence to pharmacological treatment (Morisky-Green questionnaire), and positive mental health (Positive Mental Health questionnaire). The measurements will be taken 24 hours after admission, upon discharge, and 25 days after discharge., Results: Enrollment commenced in October 2022. Data collection will be completed in April 2023., Conclusions: The results of this study will offer evidence of the effectiveness of a pharmacological educational nurse intervention by means of a free smartphone app. If its efficacy is demonstrated and the results are acceptable, it could mean an improvement in the care of patients with femur fractures, and this technology could be used to guide other training interventions in patients with other pathologies., Trial Registration: ClinicalTrials.gov NCTT05669040; https://clinicaltrials.gov/ct2/show/NCTT05669040., International Registered Report Identifier (irrid): DERR1-10.2196/45856., (©Gemma Marcos Anton, Montserrat Puig Llobet, Teresa Lluch Canut, Maria Aurelia Sanchez Ortega, Mercè Piazuelo Pont, MªCarmen Moreno-Arroyo. Originally published in JMIR Research Protocols (https://www.researchprotocols.org), 28.04.2023.)
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- 2023
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8. Profile of Patients with Dementia or Cognitive Impairment Hospitalized with a Proximal Femur Fracture Requiring Surgery.
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Casafont C, González-Garcia MJ, Marañón-Echeverría A, Cobo-Sánchez JL, Bravo M, Piazuelo M, and Zabalegui A
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- Aged, Aged, 80 and over, Female, Femur, Hospitalization, Humans, Longitudinal Studies, Cognitive Dysfunction epidemiology, Dementia epidemiology, Femoral Fractures complications, Femoral Fractures surgery, Hip Fractures surgery, Malnutrition, Pressure Ulcer
- Abstract
This study reports the characteristics of patients with dementia or cognitive impairment hospitalized with a proximal femur fracture requiring surgery., Methods: Multicentric descriptive longitudinal study conducted in three traumatology units, representing high-technology public hospitals across Spain. Data collection took place between August 2018 and December 2019 upon admission to hospital, discharge, one month and three months after discharge., Results: Study participants ( n = 174) were mainly women (81.6%), and the mean age was 90.7± 6.3 years old. Significant statistical differences were noted in the decline of functional capacity at baseline and one month later, and after three months they had still not recovered. Malnutrition increased from baseline to the one-month follow-up. The use of physical restraints increased during hospitalization, especially bilateral bedrails and a belt in the chair/bed. After one month, 15.2% of patients had pressure ulcers. Although pain decreased, it was still present after three months., Conclusion: Hospitalization after hip surgery for elderly people with dementia or cognitive impairment negatively impacted their global health outcomes such as malnutrition and the development of pressure ulcers, falls, functional impairment and the use of physical restraints and pain management challenges. Hospitals should implement policy-makers' strategic dementia care plans to improve their outcomes.
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- 2022
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9. Care of older people with Cognitive Impairment or Dementia Hospitalized in Traumatology Units (CARExDEM): a quasi-experiment.
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Casafont C, Risco E, Piazuelo M, Ancín-Pagoto M, Cobo-Sánchez JL, Solís-Muñoz M, and Zabalegui A
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- Aftercare, Aged, Aged, 80 and over, Caregivers, Europe, Humans, Patient Discharge, Quality of Life, Spain epidemiology, Cognitive Dysfunction, Dementia diagnosis, Dementia epidemiology, Dementia therapy, Traumatology
- Abstract
Background: In our context, as in other European countries, care of patients with cognitive disorders or dementia still represents a major challenge in hospital settings. Thus, there is a need to ensure quality and continuity of care, avoiding preventable readmissions, which involve an increase in public expenses. Healthcare professionals need to acquire the necessary knowledge and skills to care for hospitalized patients with cognitive disorders and dementia., Methods: A quasi-experimental design with repeated observations, taken at baseline, post-intervention, and at one and three months post-intervention, in people hospitalized with cognitive disorders or dementia. The study will be carried out in four general hospitals in Spain and will include 430 PwD and their caregivers. The intervention was previously developed using the Balance of Care methodology where nurses, physicians, social workers and informal caregivers identified the best practices for this specific care situation. We aim to personalize the intervention, as recommended in the literature. The study has an innovative approach that includes new technologies and previous scientific evidence. Valid, reliable instruments will be used to measure the intervention outcomes. Quality of care and comorbidity will be analyzed based on the use of restraints and psychotropic medication, pain control, falls, functional capacity and days of hospitalization. Continuity of care will be measured based on post-discharge emergency hospital visits, visits to specialists, cost, and inter-sectorial communication among healthcare professionals and informal caregivers. Statistical analysis will be performed to analyze the effect of the intervention on quality of care, comorbidity and continuity of care for patients with dementia., Discussion: Our aim is to helping healthcare professionals to improve the management of cognitive disorders or dementia care during hospitalization and the quality of care, comorbidity and continuity of care in patients with dementia and their informal caregivers. Moving towards dementia-friendly environments is vital to achieving the optimum care outcomes., Trial Registration: Registered in Clinical Trials. ClinicalTrials.gov Identifier: NCT04048980 retrospectively registered on the 6th August 2019. https://clinicaltrials.gov/ Protocol Record HCB/2017/0499., Sponsor: Hospital Clinic Barcelona.
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- 2020
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10. A Prolonged Post-Operative Antibiotic Regimen Reduced the Rate of Prosthetic Joint Infection after Aseptic Revision Knee Arthroplasty.
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Claret G, Tornero E, Martínez-Pastor JC, Piazuelo M, Martínez J, Bosch J, Mensa J, and Soriano A
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- Aged, Aged, 80 and over, Arthritis epidemiology, Ceftazidime administration & dosage, Female, Humans, Incidence, Male, Prosthesis-Related Infections epidemiology, Retrospective Studies, Teicoplanin administration & dosage, Time Factors, Treatment Outcome, Vancomycin administration & dosage, Anti-Bacterial Agents administration & dosage, Antibiotic Prophylaxis methods, Arthritis prevention & control, Arthroplasty, Replacement, Knee adverse effects, Postoperative Care methods, Prosthesis-Related Infections prevention & control
- Abstract
Background: The aim of this study was to compare the prosthetic joint infection (PJI) rate after knee revision arthroplasty in two consecutive periods with different antibiotic prophylaxis: short (one day) versus long (five days)., Methods: From January 2007 to September 2010 antibiotic prophylaxis consisted of 800 mg of teicoplanin and 2 g of ceftazidime intravenously and 1 g of ceftazidime two hours after the first dose. From October 2010, it was prolonged post-operatively using vancomycin and ceftazidime intravenously until the fifth day., Results: During the study period, 341 revision surgeries met the inclusion criteria. The PJI rate was lower in the long-prophylaxis group (2.2% versus 6.9%, p=0.049). Prolonged post-operative antibiotic treatment was the only variable associated independently with a lower rate of PJI (odds ratio [OR]: 0.27, 95% confidence interval [CI]: 0.07-0.99).
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- 2015
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11. Evaluation of add-on devices for the prevention of phlebitis and other complications associated with the use of peripheral catheters in hospitalised adults: a randomised controlled study.
- Author
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Martínez JA, Piazuelo M, Almela M, Blecua P, Gallardo R, Rodríguez S, Escalante Z, Robau M, and Trilla A
- Subjects
- Adult, Catheterization, Peripheral methods, Catheters, Indwelling adverse effects, Equipment Contamination, Female, Gram-Positive Bacteria classification, Gram-Positive Bacteria isolation & purification, Gram-Positive Bacterial Infections epidemiology, Gram-Positive Bacterial Infections microbiology, Hospitalization, Hospitals, University, Humans, Incidence, Male, Middle Aged, Phlebitis microbiology, Treatment Outcome, Catheterization, Peripheral adverse effects, Catheterization, Peripheral instrumentation, Phlebitis epidemiology, Phlebitis prevention & control
- Abstract
The aim of this study was to assess the role of add-on devices for the prevention of phlebitis and other complications associated with the use of peripheral catheters. Patients admitted to an infectious diseases ward and requiring the insertion of a peripheral catheter for at least 24h were randomly allocated to be managed with or without add-on devices. Incidence of phlebitis and all complications were the primary outcomes. Extravasation, inadvertent withdrawal, obstruction and rupture were considered to be mechanical complications, and analysis was performed using survival methods. Of 683 evaluated catheters, 351 were allocated to the add-on device arm and 332 to the control arm. Despite randomisation, patients in the add-on device group were older (P=0.048), less likely to have human immunodeficiency virus (P=0.02) and more likely to have received antibiotics (P=0.05). After adjustment for these variables, the hazard ratio for phlebitis remained non-significant (hazard ratio: 0.95; 95% confidence interval: 0.7-1.3), but the risk of mechanical complications became lower in the add-on device arm (0.68; 0.5-0.94). This translated into a trend towards a lower risk of any complication (0.83; 0.67-1.01). The beneficial effect on mechanical or all complications was noticeable after six days of catheterisation. Add-on devices do not reduce the incidence of phlebitis but may prevent mechanical complications. However, the impact of add-on devices on the incidence of all complications is at most small and only apparent after the sixth day of catheter use.
- Published
- 2009
- Full Text
- View/download PDF
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