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Mark Pimentel

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https://www.readbyqxmd.com/read/29221145/subependymal-giant-cell-astrocytomas-in-tuberous-sclerosis-complex-have-consistent-tsc1-tsc2-biallelic-inactivation-and-no-braf-mutations
#1
Anika Bongaarts, Krinio Giannikou, Roy J Reinten, Jasper J Anink, James D Mills, Floor E Jansen, G M Wim Spliet, Willfred F A den Dunnen, Roland Coras, Ingmar Blümcke, Werner Paulus, Theresa Scholl, Martha Feucht, Katarzyna Kotulska, Sergiusz Jozwiak, Anna Maria Buccoliero, Chiara Caporalini, Flavio Giordano, Lorenzo Genitori, Figen Söylemezoğlu, José Pimentel, Mark Nellist, Antoinette Y N Schouten-van Meeteren, Anwesha Nag, Angelika Mühlebner, David J Kwiatkowski, Eleonora Aronica
Subependymal giant cell astrocytomas (SEGAs) are rare, low-grade glioneuronal brain tumors that occur almost exclusively in patients with tuberous sclerosis complex (TSC). Though histologically benign, SEGAs can lead to serious neurological complications, including hydrocephalus, intractable seizures and death. Previous studies in a limited number of SEGAs have provided evidence for a biallelic two-hit inactivation of either TSC1 or TSC2, resulting in constitutive activation of the mechanistic target of rapamycin complex 1 pathway...
November 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29118625/a-new-species-of-scinax-from-the-purus-madeira-interfluve-brazilian-amazonia-anura-hylidae
#2
Miquéias Ferrão, Jiří Moravec, Rafael de Fraga, Alexandre Pinheiro de Almeida, Igor Luis Kaefer, Albertina Pimentel Lima
A new tree frog species of the genus Scinax from the interfluve between the Purus and Madeira rivers, Brazilian Amazonia, is described and illustrated. The new species is diagnosed by medium body size, snout truncate in dorsal view, ulnar and tarsal tubercles absent, nuptial pads poorly developed, skin on dorsum shagreen, dorsum light brown with dark brown spots and markings, white groin with black spots, anterior and posterior surfaces of thighs black, and iris bright orange. The advertisement call consists of a single short note, with 16-18 pulses and dominant frequency at 1572-1594 Hz...
2017: ZooKeys
https://www.readbyqxmd.com/read/29099776/towards-the-development-of-a-low-cost-device-for-the-detection-of-explosives-vapors-by-fluorescence-quenching-of-conjugated-polymers-in-solid-matrices
#3
Liliana M Martelo, Tiago F Pimentel das Neves, João Figueiredo, Lino Marques, Alexander Fedorov, Ana Charas, Mário N Berberan-Santos, Hugh D Burrows
Conjugated polymers (CPs) have proved to be promising chemosensory materials for detecting nitroaromatic explosives vapors, as they quickly convert a chemical interaction into an easily-measured high-sensitivity optical output. The nitroaromatic analytes are strongly electron-deficient, whereas the conjugated polymer sensing materials are electron-rich. As a result, the photoexcitation of the CP is followed by electron transfer to the nitroaromatic analyte, resulting in a quenching of the light-emission from the conjugated polymer...
November 3, 2017: Sensors
https://www.readbyqxmd.com/read/28932270/repeat-treatment-with-rifaximin-improves-irritable-bowel-syndrome-related-quality-of-life-a-secondary-analysis-of-a-randomized-double-blind-placebo-controlled-trial
#4
Brooks D Cash, Mark Pimentel, Satish S C Rao, Leonard Weinstock, Lin Chang, Zeev Heimanson, Anthony Lembo
BACKGROUND: Diarrhea-predominant irritable bowel syndrome (IBS-D) impairs patient quality of life (QOL). Rifaximin is an oral, nonsystemic antibiotic indicated for IBS-D. The objective of this secondary analysis was to evaluate rifaximin retreatment on IBS-related QOL in patients with IBS-D. METHODS: Patients received open-label rifaximin 550 mg three times daily for 2 weeks. Clinical responders [simultaneously meeting weekly response criteria for abdominal pain (⩾30% improvement from baseline in mean weekly pain score) and stool consistency (⩾50% decrease from baseline in number of days/week with Bristol Stool Scale (BSS) type 6 or 7 stools) during ⩾2 of first 4 weeks posttreatment] who relapsed during an up to 18-week treatment-free observation phase were randomly assigned to receive two 2-week courses of double-blind rifaximin or placebo, separated by 10 weeks...
September 2017: Therapeutic Advances in Gastroenterology
https://www.readbyqxmd.com/read/28818267/is-small-intestinal-bacterial-overgrowth-involved-in-the-pathogenesis-of-functional-dyspepsia
#5
Georgios Tziatzios, Evangelos J Giamarellos-Bourboulis, Ioannis S Papanikolaou, Mark Pimentel, George D Dimitriadis, Konstantinos Triantafyllou
Functional dyspepsia is a highly prevalent disease, with significant impacts on patients' quality of life and economic robustness of health care systems worldwide. It constitutes a constellation of symptoms located in the gastro duodenal region while its pathogenesis remains poorly understood. Accumulating evidence suggest that small intestinal bacterial overgrowth is associated with the etiology of functional gastrointestinal disorders. We herein present the hypothesis that a causal link between small intestinal bacterial overgrowth and functional dyspepsia might exist...
September 2017: Medical Hypotheses
https://www.readbyqxmd.com/read/28644726/cytotoxic-and-genotoxic-actions-of-casiopeina-iii-ea-cas-iii-ea-in-somatic-and-germ-cells-of-drosophila-melanogaster
#6
L M Vidal, E Pimentel, M P Cruces, S Hernández, L Ruiz-Azuara
Casiopeinas® are a group of newly synthesized drugs designed to treat cancer. These copper (Cu) complexes exhibit cytostatic, cytotoxic, genotoxic, and antineoplastic activities through different mechanisms of action. To evaluate the influence of these compounds, some in vivo studies were performed using predominantly somatic cells. The aim of the present study was to examine the cytotoxic and genotoxic actions of Casiopeina III-Ea (Cas III-Ea) in somatic as well as germ cells of Drosophila melanogaster. For cytotoxicity, the productivity and some morphometric parameters were measured and genotoxicity was assessed by means of the somatic mutation and recombination test assay in the wing...
2017: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/28590500/genetic-diversity-of-morato-s-digger-toad-proceratophrys-moratoi-spatial-structure-gene-flow-effective-size-and-the-need-for-differential-management-strategies-of-populations
#7
Mauricio P Arruda, William P Costa, Shirlei M Recco-Pimentel
The Morato's Digger Toad, Proceratophrys moratoi, is a critically endangered toad species with a marked population decline in southern Brazilian Cerrado. Despite this, new populations are being discovered, primarily in the northern part of the distribution range, which raises a number of questions with regard to the conservation status of the species. The present study analyzed the genetic diversity of the species based on microsatellite markers. Our findings permitted the identification of two distinct management units...
April 2017: Genetics and Molecular Biology
https://www.readbyqxmd.com/read/28451914/assessment-of-anti-vinculin-and-anti-cytolethal-distending-toxin-b-antibodies-in-subtypes-of-irritable-bowel-syndrome
#8
Ali Rezaie, Sung Chul Park, Walter Morales, Emily Marsh, Anthony Lembo, Jae Hak Kim, Stacy Weitsman, Kathleen S Chua, Gillian M Barlow, Mark Pimentel
BACKGROUND: Antibodies to cytolethal distending toxin B (CdtB) and vinculin are novel biomarkers that rule-in and differentiate irritable bowel syndrome with diarrhea (IBS-D) from other causes of diarrhea and healthy controls. AIM: To determine whether these antibodies can also diagnose and differentiate other IBS subtypes. METHODS: Subjects with IBS-D based on Rome III criteria (n = 2375) were recruited from a large-scale multicenter clinical trial (TARGET 3)...
June 2017: Digestive Diseases and Sciences
https://www.readbyqxmd.com/read/28381845/autoimmunity-as-a-potential-cause-of-post-infectious-gut-dysmotility-a-longitudinal-observation
#9
Ali Rezaie, Mark Pimentel, Erica Cohen
No abstract text is available yet for this article.
April 2017: American Journal of Gastroenterology
https://www.readbyqxmd.com/read/28323273/hydrogen-and-methane-based-breath-testing-in-gastrointestinal-disorders-the-north-american-consensus
#10
Ali Rezaie, Michelle Buresi, Anthony Lembo, Henry Lin, Richard McCallum, Satish Rao, Max Schmulson, Miguel Valdovinos, Salam Zakko, Mark Pimentel
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. METHODS: Pre-meeting survey questions encompassing five domains; indications, preparation, performance, interpretation of results, and knowledge gaps, were sent to 17 clinician-scientists, and 10 attended a live meeting...
May 2017: American Journal of Gastroenterology
https://www.readbyqxmd.com/read/28291327/mechanism-of-antibacterial-activity-via-morphology-change-of-%C3%AE-agvo3-theoretical-and-experimental-insights
#11
Regiane Cristina de Oliveira, Camila Cristina de Foggi, Mayara Mondego Teixeira, Maya Dayana Penha da Silva, Marcelo Assis, Eric Mark Francisco, Bruna Natalia Alves da Silva Pimentel, Paula Fabiana Dos Santos Pereira, Carlos Eduardo Vergani, Ana Lúcia Machado, Juan Andres, Lourdes Gracia, Elson Longo
The electronic configuration, morphology, optical features, and antibacterial activity of metastable α-AgVO3 crystals have been discussed by a conciliation and association of the results acquired by experimental procedures and first-principles calculations. The α-AgVO3 powders were synthesized using a coprecipitation method at 10, 20, and 30 °C. By using a Wulff construction for all relevant low-index surfaces [(100), (010), (001), (110), (011), (101), and (111)], the fine-tuning of the desired morphologies can be achieved by controlling the values of the surface energies, thereby lending a microscopic understanding to the experimental results...
March 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28112540/do-different-tendons-exhibit-the-same-response-following-chronic-exposure-to-statins
#12
L P Oliveira, C P Vieira, P P Marques, E R Pimentel
Over the past few years, a number of cases of tendon injuries associated with statin therapy have been reported. In this study, we assessed whether statins can affect the extracellular matrix (ECM) of the deep digital flexor tendon (DDFT) and patellar tendon (PT). Wistar rats were assigned to groups treated with atorvastatin (A20, A80), treated with simvastatin (S20, S80), and control. Zymography, Western blotting for collagen I, non-collagenous proteins (NCP), glycosaminoglycans (GAGs), and hydroxyproline quantifications were performed...
April 2017: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28002334/gender-differences-among-patients-with-primary-ankylosing-spondylitis-and-spondylitis-associated-with-psoriasis-and-inflammatory-bowel-disease-in-an-iberoamerican-spondyloarthritis-cohort
#13
MULTICENTER STUDY
Margarita Landi, Hernán Maldonado-Ficco, Rodolfo Perez-Alamino, José A Maldonado-Cocco, Gustavo Citera, Pablo Arturi, Percival D Sampaio-Barros, Diana E Flores Alvarado, Rubén Burgos-Vargas, Elena Santos, Daniel Palleiro, Miguel A Gutiérrez, Elsa Vieyra-Sousa, Fernando Pimentel-Santos, Sergio O Paira, Alberto Berman, Claudia Vera Barrezueta, Janitzia Vazquez-Mellado, Eduardo Collantes-Estevez
The aim of the study was to compare clinical manifestations, disease activity, functional capacity, spinal mobility, and radiological findings between men and women from a multicenter, multiethnic Ibero-American cohort of patients with Spondyloarthritis (SpA).This observational cross-section study included 1264 consecutive SpA patients who fulfilled the modified New York criteria for ankylosing spondylitis (AS). Demographic, clinical, and radiologic data were evaluated. Categorical data were compared by X or Fisher's exact tests and continuous variables by ANOVA with post-hoc tests...
December 2016: Medicine (Baltimore)
https://www.readbyqxmd.com/read/27986795/defibrillation-thresholds-with-right-pectoral-implantable-cardioverter-defibrillators-and-impact-of-waveform-tuning-the-tilt-and-tune-trial
#14
Niraj Varma, Raymond Schaerf, Steven Kalbfleisch, Rhea Pimentel, Mark W Kroll, Ashish Oza
Aims: Assess defibrillation thresholds (DFTs) with right active pectoral implantable cardioverter defibrillator (RICDs). Defibrillation thresholds in patients receiving RICDs are regarded as 'high' and potentially improved by waveform optimization (tuning). However, this has not been systematically tested. Methods and results: Patients receiving RICDs [Single chamber (VVI) = 16, DDD = 32, cardiac resynchronization therapy (CRT) = 43] were randomized to either 50/50% fixed tilt (FT) or tuned waveform (3...
November 1, 2017: Europace: European Pacing, Arrhythmias, and Cardiac Electrophysiology
https://www.readbyqxmd.com/read/27960086/integrated-epi-genomic-analyses-identify-subgroup-specific-therapeutic-targets-in-cns-rhabdoid-tumors
#15
Jonathon Torchia, Brian Golbourn, Shengrui Feng, King Ching Ho, Patrick Sin-Chan, Alexandre Vasiljevic, Joseph D Norman, Paul Guilhamon, Livia Garzia, Natalia R Agamez, Mei Lu, Tiffany S Chan, Daniel Picard, Pasqualino de Antonellis, Dong-Anh Khuong-Quang, Aline C Planello, Constanze Zeller, Dalia Barsyte-Lovejoy, Lucie Lafay-Cousin, Louis Letourneau, Mathieu Bourgey, Man Yu, Deena M A Gendoo, Misko Dzamba, Mark Barszczyk, Tiago Medina, Alexandra N Riemenschneider, A Sorana Morrissy, Young-Shin Ra, Vijay Ramaswamy, Marc Remke, Christopher P Dunham, Stephen Yip, Ho-Keung Ng, Jian-Qiang Lu, Vivek Mehta, Steffen Albrecht, Jose Pimentel, Jennifer A Chan, Gino R Somers, Claudia C Faria, Lucia Roque, Maryam Fouladi, Lindsey M Hoffman, Andrew S Moore, Yin Wang, Seung Ah Choi, Jordan R Hansford, Daniel Catchpoole, Diane K Birks, Nicholas K Foreman, Doug Strother, Almos Klekner, Laszló Bognár, Miklós Garami, Péter Hauser, Tibor Hortobágyi, Beverly Wilson, Juliette Hukin, Anne-Sophie Carret, Timothy E Van Meter, Eugene I Hwang, Amar Gajjar, Shih-Hwa Chiou, Hideo Nakamura, Helen Toledano, Iris Fried, Daniel Fults, Takafumi Wataya, Chris Fryer, David D Eisenstat, Katrin Scheinemann, Adam J Fleming, Donna L Johnston, Jean Michaud, Shayna Zelcer, Robert Hammond, Samina Afzal, David A Ramsay, Nongnuch Sirachainan, Suradej Hongeng, Noppadol Larbcharoensub, Richard G Grundy, Rishi R Lulla, Jason R Fangusaro, Harriet Druker, Ute Bartels, Ronald Grant, David Malkin, C Jane McGlade, Theodore Nicolaides, Tarik Tihan, Joanna Phillips, Jacek Majewski, Alexandre Montpetit, Guillaume Bourque, Gary D Bader, Alyssa T Reddy, G Yancey Gillespie, Monika Warmuth-Metz, Stefan Rutkowski, Uri Tabori, Mathieu Lupien, Michael Brudno, Ulrich Schüller, Torsten Pietsch, Alexander R Judkins, Cynthia E Hawkins, Eric Bouffet, Seung-Ki Kim, Peter B Dirks, Michael D Taylor, Anat Erdreich-Epstein, Cheryl H Arrowsmith, Daniel D De Carvalho, James T Rutka, Nada Jabado, Annie Huang
We recently reported that atypical teratoid rhabdoid tumors (ATRTs) comprise at least two transcriptional subtypes with different clinical outcomes; however, the mechanisms underlying therapeutic heterogeneity remained unclear. In this study, we analyzed 191 primary ATRTs and 10 ATRT cell lines to define the genomic and epigenomic landscape of ATRTs and identify subgroup-specific therapeutic targets. We found ATRTs segregated into three epigenetic subgroups with distinct genomic profiles, SMARCB1 genotypes, and chromatin landscape that correlated with differential cellular responses to a panel of signaling and epigenetic inhibitors...
December 12, 2016: Cancer Cell
https://www.readbyqxmd.com/read/27817184/biomarkers-of-irritable-bowel-syndrome
#16
REVIEW
Jae Hak Kim, Eugenia Lin, Mark Pimentel
Traditionally, irritable bowel syndrome (IBS) has not been regarded as an organic disease, and the pathophysiology of IBS is heterogeneous. Currently, the diagnosis of IBS is based upon the Rome diagnostic criteria. The performance of these criteria is only modest in predicting IBS, and moreover their validation is lacking. Additionally, as functional symptoms are common in the general population, healthy controls or volunteers are difficult to define and there is currently no definition of "normal" in the Rome criteria...
January 30, 2017: Journal of Neurogastroenterology and Motility
https://www.readbyqxmd.com/read/27795384/antimicrobial-susceptibility-of-staphylococcus-isolates-from-the-skin-of-patients-with-diarrhea-predominant-irritable-bowel-syndrome-treated-with-repeat-courses-of-rifaximin
#17
LETTER
Herbert L DuPont, Ray A Wolf, Robert J Israel, Mark Pimentel
No abstract text is available yet for this article.
January 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/27682513/a-definitive-blood-test-for-post-infectious-irritable-bowel-syndrome
#18
EDITORIAL
Gillian M Barlow, Ali Rezaie, Eugenia Lin, Mark Pimentel
No abstract text is available yet for this article.
November 2016: Expert Review of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/27547364/interspecific-variation-in-the-relationship-between-clutch-size-laying-date-and-intensity-of-urbanization-in-four-species-of-hole-nesting-birds
#19
Marie Vaugoyeau, Frank Adriaensen, Alexandr Artemyev, Jerzy Bańbura, Emilio Barba, Clotilde Biard, Jacques Blondel, Zihad Bouslama, Jean-Charles Bouvier, Jordi Camprodon, Francesco Cecere, Anne Charmantier, Motti Charter, Mariusz Cichoń, Camillo Cusimano, Dorota Czeszczewik, Virginie Demeyrier, Blandine Doligez, Claire Doutrelant, Anna Dubiec, Marcel Eens, Tapio Eeva, Bruno Faivre, Peter N Ferns, Jukka T Forsman, Eduardo García-Del-Rey, Aya Goldshtein, Anne E Goodenough, Andrew G Gosler, Arnaud Grégoire, Lars Gustafsson, Iga Harnist, Ian R Hartley, Philipp Heeb, Shelley A Hinsley, Paul Isenmann, Staffan Jacob, Rimvydas Juškaitis, Erkki Korpimäki, Indrikis Krams, Toni Laaksonen, Marcel M Lambrechts, Bernard Leclercq, Esa Lehikoinen, Olli Loukola, Arne Lundberg, Mark C Mainwaring, Raivo Mänd, Bruno Massa, Tomasz D Mazgajski, Santiago Merino, Cezary Mitrus, Mikko Mönkkönen, Xavier Morin, Ruedi G Nager, Jan-Åke Nilsson, Sven G Nilsson, Ana C Norte, Markku Orell, Philippe Perret, Christopher M Perrins, Carla S Pimentel, Rianne Pinxten, Heinz Richner, Hugo Robles, Seppo Rytkönen, Juan Carlos Senar, Janne T Seppänen, Luis Pascoal da Silva, Tore Slagsvold, Tapio Solonen, Alberto Sorace, Martyn J Stenning, Piotr Tryjanowski, Mikael von Numers, Wieslaw Walankiewicz, Anders Pape Møller
The increase in size of human populations in urban and agricultural areas has resulted in considerable habitat conversion globally. Such anthropogenic areas have specific environmental characteristics, which influence the physiology, life history, and population dynamics of plants and animals. For example, the date of bud burst is advanced in urban compared to nearby natural areas. In some birds, breeding success is determined by synchrony between timing of breeding and peak food abundance. Pertinently, caterpillars are an important food source for the nestlings of many bird species, and their abundance is influenced by environmental factors such as temperature and date of bud burst...
August 2016: Ecology and Evolution
https://www.readbyqxmd.com/read/27528177/repeat-treatment-with-rifaximin-is-safe-and-effective-in-patients-with-diarrhea-predominant-irritable-bowel-syndrome
#20
RANDOMIZED CONTROLLED TRIAL
Anthony Lembo, Mark Pimentel, Satish S Rao, Philip Schoenfeld, Brooks Cash, Leonard B Weinstock, Craig Paterson, Enoch Bortey, William P Forbes
BACKGROUND & AIMS: Few treatments have demonstrated efficacy and safety for diarrhea-predominant irritable bowel syndrome (IBS-D). A phase 3, randomized, double-blind, placebo-controlled trial was performed to evaluate the safety and efficacy of repeat treatment with the nonsystemic antibiotic rifaximin. METHODS: The trial included adults with IBS-D, mean abdominal pain and bloating scores of 3 or more, and loose stool, located at 270 centers in the United States and Europe from February 2012 through June 2014...
December 2016: Gastroenterology
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