Publications by authors named "A-R Pimentel"

Article Synopsis
  • Rifaximin is FDA-approved for treating IBS-D but has limited effectiveness due to poor solubility impacting its ability to target E. coli in the mucus layer.
  • Adding N-acetylcysteine (NAC) enhances rifaximin's efficacy against E. coli, as shown through tests in both lab assays and a rat model of IBS-D.
  • The combination of rifaximin and NAC effectively normalized stool consistency and bacterial levels in the rat model, suggesting potential for improved treatment responses in IBS-D patients.
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Article Synopsis
  • * Specific microbial features were identified for overweight and obese subjects, such as changes in the abundance of key bacteria like Bifidobacterium and Lactobacillus, indicating their potential roles in metabolic health.
  • * The study revealed both progressive (escalation) and reverse (de-escalation) changes in microbial populations as subjects transitioned from normal weight to overweight and then to obesity, suggesting complex interactions between gut bacteria and metabolic conditions.
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Background And Objective: Patients with presumed nonlesional focal epilepsy-based on either MRI or histopathologic findings-have a lower success rate of epilepsy surgery compared with lesional patients. In this study, we aimed to characterize a large group of patients with focal epilepsy who underwent epilepsy surgery despite a normal MRI and had no lesion on histopathology. Determinants of their postoperative seizure outcomes were further studied.

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Background: We recently demonstrated that diarrhea-predominant irritable bowel syndrome (IBS-D) subjects have higher relative abundance (RA) of hydrogen sulfide (HS)-producing Fusobacterium and Desulfovibrio species, and constipation-predominant IBS (IBS-C) subjects have higher RA of methanogen Methanobrevibacter smithii.

Aims: In this study, we investigate the effects of increased methanogens or HS producers on stool phenotypes in rat models.

Methods: Adult Sprague-Dawley rats were fed high-fat diet (HFD) for 60 days to increase M.

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Background And Objectives: The efficacy of deep brain stimulation of the anterior nucleus of the thalamus (ANT DBS) in patients with drug-resistant epilepsy (DRE) was demonstrated in the double-blind Stimulation of the Anterior Nucleus of the Thalamus for Epilepsy randomized controlled trial. The Medtronic Registry for Epilepsy (MORE) aims to understand the safety and longer-term effectiveness of ANT DBS therapy in routine clinical practice.

Methods: MORE is an observational registry collecting prospective and retrospective clinical data.

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Introduction: While high-resolution manometry (HRM) is widely accepted as a safe procedure, no study has assessed the safety profile of HRM in clinical practice. This study aimed to determine the safety and tolerability of HRM and to investigate potential determinants of intolerability.

Methods: We obtained HRM procedure reports, demographics, and clinical data (2005-2022) at a tertiary center using electronic chart review.

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Rigorous record-keeping and quality control are required to ensure the quality, reproducibility and value of imaging data. The 4DN Initiative and BINA here propose light Microscopy Metadata specifications that extend the OME data model, scale with experimental intent and complexity, and make it possible for scientists to create comprehensive records of imaging experiments.

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A modern day light microscope has evolved from a tool devoted to making primarily empirical observations to what is now a sophisticated , quantitative device that is an integral part of both physical and life science research. Nowadays, microscopes are found in nearly every experimental laboratory. However, despite their prevalent use in capturing and quantifying scientific phenomena, neither a thorough understanding of the principles underlying quantitative imaging techniques nor appropriate knowledge of how to calibrate, operate and maintain microscopes can be taken for granted.

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Objectives: Breath tests (BTs) are important for the diagnosis of carbohydrate maldigestion syndromes and small intestinal bacterial overgrowth (SIBO). However, standardization is lacking regarding indications for testing, test methodology and interpretation of results. A consensus meeting of experts was convened to develop guidelines for clinicians and research.

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