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Michael Camilleri

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https://www.readbyqxmd.com/read/28323272/constipation-predominant-irritable-bowel-syndrome-females-have-normal-colonic-barrier-and-secretory-function
#1
Stephanie A Peters, Shoko Edogawa, Wendy J Sundt, Roy B Dyer, Daniel A Dalenberg, Amelia Mazzone, Ravinder J Singh, Natalie Moses, Thomas C Smyrk, Christopher Weber, David R Linden, Wallace K MacNaughton, Jerrold R Turner, Michael Camilleri, David A Katzka, Gianrico Farrugia, Madhusudan Grover
OBJECTIVES: The objective of this study was to determine whether constipation-predominant irritable bowel syndrome (IBS-C) is associated with changes in intestinal barrier and secretory function. METHODS: A total of 19 IBS-C patients and 18 healthy volunteers (all females) underwent saccharide excretion assay (0.1 g (13)C mannitol and 1 g lactulose), measurements of duodenal and colonic mucosal barrier (transmucosal resistance (TMR), macromolecular and Escherichia coli Bio-Particle translocation), mucosal secretion (basal and acetylcholine (Ach)-evoked short-circuit current (Isc)), in vivo duodenal mucosal impedance, circulating endotoxins, and colonic tight junction gene expression...
March 21, 2017: American Journal of Gastroenterology
https://www.readbyqxmd.com/read/28291238/polymorphisms-of-5-htt-lpr-and-gn%C3%AE-3-825c-t-and-response-to-antidepressant-treatment-in-functional-dyspepsia-a-study-from-the-functional-dyspepsia-treatment-trial
#2
Yuri A Saito, G Richard Locke, Ann E Almazar, Ernest P Bouras, Colin W Howden, Brian E Lacy, John K DiBaise, Charlene M Prather, Bincy P Abraham, Hashem B El-Serag, Paul Moayyedi, Linda M Herrick, Lawrence A Szarka, Michael Camilleri, Frank A Hamilton, Cathy D Schleck, Katherine E Tilkes, Alan R Zinsmeister, Nicholas J Talley
OBJECTIVES: The Functional Dyspepsia Treatment Trial reported that amitriptyline (AMI) was associated with adequate relief of functional dyspepsia (FD) symptoms, but the pharmacogenetics of antidepressant response in FD are not known. GNβ3 825C>T CC genotype has been previously linked to FD and TT genotype to antidepressant response in depression. The ss genotype of the 5-HTT LPR variant of the serotonin transporter gene (SLC6A4) has been linked to selective serotonin reuptake inhibitor (SSRI) response...
March 14, 2017: American Journal of Gastroenterology
https://www.readbyqxmd.com/read/28275113/potential-mechanisms-of-effects-of-serum-derived-bovine-immunoglobulin-protein-isolate-therapy-in-patients-with-diarrhea-predominant-irritable-bowel-syndrome
#3
Nelson Valentin, Michael Camilleri, Paula Carlson, Sean C Harrington, Deborah Eckert, Jessica O'Neill, Duane Burton, Jun Chen, Audrey L Shaw, Andres Acosta
Serum-derived bovine immunoglobulin/protein isolate (SBI), an oral nutritional therapy, is efficacious in diverse diarrheal diseases. In an open-label study in 15 patients with irritable bowel syndrome-diarrhea (IBS-D), we evaluated effects of SBI (5.0 g, twice a day) for 8 weeks on safety, on bowel function and abdominal pain, tryptophan metabolism (K:T ratio), intestinal permeability ((13)C-mannitol and lactulose excretion), bile acid synthesis (fasting serum FGF-19 and C4), duodenal and stool microbiome, and the expression of 90 genes related to inflammation, immune function, and tight junctions in duodenal mucosa...
March 2017: Physiological Reports
https://www.readbyqxmd.com/read/28192107/gastrointestinal-complications-of-obesity
#4
Michael Camilleri, Harmeet Malhi, Andres Acosta
Obesity is usually associated with morbidity related to diabetes mellitus and cardiovascular diseases. However, there are many gastrointestinal and hepatic diseases for which obesity is the direct cause [e.g. non-alcoholic fatty liver diseases (NAFLD)] or is a significant risk factor, such as reflux esophagitis and gallstones. When obesity is a risk factor, it may interact with other mechanisms and result in earlier presentation or complicated diseases. There are increased odds ratios or relative risks of several gastrointestinal complications of obesity: gastroesophageal reflux disease (GERD), erosive esophagitis, Barrett's esophagus, esophageal adenocarcinoma, erosive gastritis, gastric cancer, diarrhea, colonic diverticular disease, polyps, cancer, liver disease including NAFLD, cirrhosis, hepatocellular carcinoma, gallstones, acute pancreatitis, and pancreatic cancer...
February 9, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28174725/2015-james-w-freston-single-topic-conference-a%C3%A2-renaissance%C3%A2-in-the-understanding-and-management-of%C3%A2-irritable-bowel-syndrome
#5
Lin Chang, Margaret M Heitkemper, John W Wiley, Michael Camilleri
No abstract text is available yet for this article.
July 2016: Cellular and Molecular Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28174717/high-fat-diet-dysbiosis-and-gastrointestinal-and-colonic-transit-is-there-a-missing-link
#6
EDITORIAL
Michael Camilleri
No abstract text is available yet for this article.
May 2016: Cellular and Molecular Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28169840/bile-acid-disease-the-emerging-epidemic
#7
Ibironke Oduyebo, Michael Camilleri
PURPOSE OF REVIEW: Our objective was to review advances in bile acids in health and disease published in the last 2 years. Bile acid diarrhea (BAD) is recognized as a common cause of chronic diarrhea, and its recognition has been facilitated by development of new screening tests. RECENT FINDINGS: Primary BAD can account for 30% of cases of chronic diarrhea. The mechanisms leading to BAD include inadequate feedback regulation by fibroblast growth factor 19 (FGF-19) from ileal enterocytes, abnormalities in synthesis or degradation of proteins involved in FGF-19 regulation in hepatocytes and variations as a function of the bile acid receptor, TGR5 (GPBAR1)...
February 6, 2017: Current Opinion in Gastroenterology
https://www.readbyqxmd.com/read/28128666/biomarkers-as-a-diagnostic-tool-for-irritable-bowel-syndrome-where-are-we
#8
Michael Camilleri, Houssam Halawi, Ibironke Oduyebo
Irritable bowel syndrome (IBS) is a common condition in clinical practice. There are currently no objective tests to rule in the disease, but rather tests to rule out other diseases. Biomarkers in IBS may provide the tools needed for diagnosis, prognosis and therapy. These include identification of differences in microbial composition, immune activation, bile acid composition, colonic transit, and alteration in sensation in subgroups of IBS patients. Areas covered: Studies included in our review were chosen based on a PubMed search for 'biomarkers' and 'IBS'...
April 2017: Expert Review of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28069350/prevalence-risk-factors-and-outcomes-of-irritable-bowel-syndrome-after-infectious-enteritis-a-systematic-review-and-meta-analysis
#9
Fabiane Klem, Akhilesh Wadhwa, Larry Prokop, Wendy Sundt, Gianrico Farrugia, Michael Camilleri, Siddharth Singh, Madhusudan Grover
BACKGROUND & AIMS: Foodborne illness affects 15% of the US population each year, and is a risk factor for irritable bowel syndrome (IBS). We evaluated risk of, risk factors for, and outcomes of IBS after infectious enteritis. METHODS: We performed a systematic review of electronic databases from 1994 through August 31, 2015 to identify cohort studies of the prevalence of IBS 3 months or more after infectious enteritis. We used random-effects meta-analysis to calculate the summary point prevalence of IBS after infectious enteritis, as well as relative risk (compared with individuals without infectious enteritis) and host- and enteritis-related risk factors...
January 6, 2017: Gastroenterology
https://www.readbyqxmd.com/read/28000249/amicrobial-pustulosis-of-the-folds-report-of-4-cases
#10
Michael Z Wang, Michael J Camilleri, Ruifeng Guo, Carilyn N Wieland
Amicrobial pustulosis of the folds (APF) is a rare disease characterized by aseptic pustular lesions involving cutaneous folds, typically occurring in the context of an autoimmune disorder. We present 4 patients with APF, focusing on clinical and histopathologic characteristics to improve the recognition of this entity. All 4 patients had intertriginous and extra-intertriginous involvement. Common histopathologic features of skin biopsies in these patients were intracorneal, subcorneal, intraepidermal, perivascular, perifollicular and interstitial neutrophilic inflammation...
December 21, 2016: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/27995391/irritable-bowel-syndrome-pathophysiology-and-current-therapeutic-approaches
#11
Michael Camilleri, Alexander C Ford
Irritable bowel syndrome (IBS) is a prevalent condition affecting 10-20% of adults in most countries; IBS results in significant morbidity and health care costs. IBS is a disorder of the brain-gut axis, and recent insights into the pathophysiological mechanisms include altered bile acid metabolism, neurohormonal regulation, immune dysfunction, alterations in the epithelial barrier, and secretory properties of the gut. There remains a significant unmet need for effective treatments, particularly for the pain component of IBS, although the introduction of drugs directed at secretion, motility, and a nonabsorbable antibiotic provides an option for the bowel dysfunction in IBS...
December 20, 2016: Handbook of Experimental Pharmacology
https://www.readbyqxmd.com/read/27986106/poems-for-gastroparesis
#12
EDITORIAL
Michael Camilleri, Lawrence A Szarka
No abstract text is available yet for this article.
January 2017: Gastrointestinal Endoscopy
https://www.readbyqxmd.com/read/27916669/prevalence-and-morbidity-of-undiagnosed-celiac-disease-from-a%C3%A2-community-based-study
#13
Rok Seon Choung, Scott A Larson, Shahryar Khaleghi, Alberto Rubio-Tapia, Inna G Ovsyannikova, Katherine S King, Joseph J Larson, Brian D Lahr, Gregory A Poland, Michael J Camilleri, Joseph A Murray
BACKGROUND & AIMS: Little is known about the prevalence and burden of undiagnosed celiac disease in individuals younger than age 50. We determined the prevalence and morbidity of undiagnosed celiac disease in individuals younger than age 50 in a community. METHODS: We tested sera from 31,255 residents of Olmsted County, Minnesota (<50 y), without a prior diagnosis of celiac disease assay using an assay for IgA against tissue transglutaminase; in subjects with positive test results, celiac disease was confirmed using an assay for endomysial IgA...
March 2017: Gastroenterology
https://www.readbyqxmd.com/read/27880079/relationship-between-gastric-emptying-and-diurnal-glycemic-control-in-type-1-diabetes-mellitus-a-randomized-trial
#14
Gopanandan Parthasarathy, Yogish C Kudva, Phillip A Low, Michael Camilleri, Ananda Basu, Adil E Bharucha
CONTEXT: In type 1 diabetes (T1D), delayed gastric emptying (GE) may predispose to a mismatch between insulin delivery and glucose absorption. Previous studies evaluated, only partly, the relationship between delayed GE and postprandial, but not diurnal, glycemia. OBJECTIVE: To assess the relationship between GE disturbances and glycemic control in T1D and the effects of accelerating GE on glycemic control. Design , Setting and Participants: This was a randomized placebo-controlled trial in 30 patients with T1D on an insulin pump at an academic medical center...
November 23, 2016: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/27872184/functional-variants-in-the-sucrase-isomaltase-gene-associate-with-increased-risk-of-irritable-bowel-syndrome
#15
Maria Henström, Lena Diekmann, Ferdinando Bonfiglio, Fatemeh Hadizadeh, Eva-Maria Kuech, Maren von Köckritz-Blickwede, Louise B Thingholm, Tenghao Zheng, Ghazaleh Assadi, Claudia Dierks, Martin Heine, Ute Philipp, Ottmar Distl, Mary E Money, Meriem Belheouane, Femke-Anouska Heinsen, Joseph Rafter, Gerardo Nardone, Rosario Cuomo, Paolo Usai-Satta, Francesca Galeazzi, Matteo Neri, Susanna Walter, Magnus Simrén, Pontus Karling, Bodil Ohlsson, Peter T Schmidt, Greger Lindberg, Aldona Dlugosz, Lars Agreus, Anna Andreasson, Emeran Mayer, John F Baines, Lars Engstrand, Piero Portincasa, Massimo Bellini, Vincenzo Stanghellini, Giovanni Barbara, Lin Chang, Michael Camilleri, Andre Franke, Hassan Y Naim, Mauro D'Amato
OBJECTIVE: IBS is a common gut disorder of uncertain pathogenesis. Among other factors, genetics and certain foods are proposed to contribute. Congenital sucrase-isomaltase deficiency (CSID) is a rare genetic form of disaccharide malabsorption characterised by diarrhoea, abdominal pain and bloating, which are features common to IBS. We tested sucrase-isomaltase (SI) gene variants for their potential relevance in IBS. DESIGN: We sequenced SI exons in seven familial cases, and screened four CSID mutations (p...
November 21, 2016: Gut
https://www.readbyqxmd.com/read/27869798/gluten-induced-symptoms-in-diarrhea-predominant-irritable-bowel-syndrome-are-associated-with-increased-myosin-light-chain-kinase-activity-and-claudin-15-expression
#16
Richard L Wu, Maria I Vazquez-Roque, Paula Carlson, Duane Burton, Madhusudan Grover, Michael Camilleri, Jerrold R Turner
The mechanisms underlying diarrhea-predominant irritable bowel syndrome (IBS-D) are poorly understood, but increased intestinal permeability is thought to contribute to symptoms. A recent clinical trial of gluten-free diet (GFD) demonstrated symptomatic improvement, relative to gluten-containing diet (GCD), which was associated with reduced intestinal permeability in non-celiac disease IBS-D patients. The aim of this study was to characterize intestinal epithelial tight junction composition in IBS-D before and after dietary gluten challenge...
January 2017: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/27856363/rectal-gas-volume-measured-by-computerized-tomography-identifies-evacuation-disorders-in-patients-with-constipation
#17
Seon-Young Park, Disha Khemani, Alfred D Nelson, Deborah Eckert, Michael Camilleri
BACKGROUND & AIMS: Approximately one third of patients who present to gastroenterology care with constipation have rectal evacuation disorders. We aimed to compare rectal gas volume, measured by computerized tomography (CT), in constipated patients with and without rectal evacuation disorders. METHODS: In a retrospective study, we collected data from 1553 patients with constipation, evaluated over 20 years. We analyzed data from 141 patients evaluated by anorectal manometry, balloon expulsion tests, and colon transit tests, collecting records of abdominal and pelvic CT examinations...
April 2017: Clinical Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/27856362/colonic-transit-and-bile-acid-synthesis-or-excretion-in-patients%C3%A2-with-irritable-bowel-syndrome-diarrhea-without-bile%C3%A2-acid-malabsorption
#18
Cédric Peleman, Michael Camilleri, Irene Busciglio, Duane Burton, Leslie Donato, Alan R Zinsmeister
BACKGROUND AND AIMS: Bile acids (BAs) are passively absorbed to a different extent along the mammalian colon, so that levels are lower in the feces than in proximal colon. Our aim was to explore associations among total, primary, and secretory BA in stool and colonic transit in patients with irritable bowel syndrome-diarrhea (IBS-D) without overt BA malabsorption (BAM). METHODS: In a cross-sectional observational study of 116 patients with IBS-D recruited from local communities in Minnesota, we measured total and individual main fecal BA excretion, fecal fat and fecal weight over 48 hours, fasting serum levels of C4 (surrogate for BA synthesis), and overall colonic transit by scintigraphy (geometric center at 24 hours and 48 hours)...
November 14, 2016: Clinical Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/27773805/pathophysiology-evaluation-and-management-of-chronic-watery-diarrhea
#19
REVIEW
Michael Camilleri, Joseph H Sellin, Kim E Barrett
Chronic watery diarrhea poses a diagnostic and therapeutic challenge and is often a disabling condition for patients. Although acute diarrhea is likely to be caused by infection, the causes of chronic diarrhea (>4 weeks in duration) are more elusive. We review the pathophysiology, diagnosis, and treatment of chronic diarrhea. Drawing on recent insights into the molecular mechanisms of intestinal epithelial transport and barrier function, we discuss how diarrhea can result from a decrease in luminal solute absorption, an increase in secretion, or both, as well as derangements in barrier properties...
February 2017: Gastroenterology
https://www.readbyqxmd.com/read/27711069/rifaximin-microbiota-biology-and-hepatic-encephalopathy
#20
EDITORIAL
Cedric Peleman, Michael Camilleri
Rifaximin is beneficial in the treatment of minimal hepatic encephalopathy (MHE). Kang et al. (Clin Transl Gastroenterol 7: e187; doi:10.1038/ctg.2016.44) investigated the effects of rifaximin in a mouse model of MHE-associated microbiota without concomitant liver disease. In addition to some impact on the composition of microbiota, rifaximin altered bacterial functions, ameliorated local and systemic inflammation, and reduced enterocyte glutaminase activity. We discuss these effects as well as the interpretation of the permeability studies, given the potential interaction of dysbiosis with dysfunctional intestinal barrier, leading to systemic inflammation and increased uptake of bacterial metabolites that contribute to MHE in the presence of hepatic dysfunction...
October 6, 2016: Clinical and Translational Gastroenterology
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