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Bile acid diarrhea

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https://www.readbyqxmd.com/read/29051033/description-of-analytical-method-and-clinical-utility-of-measuring-serum-7-alpha-hydroxy-4-cholesten-3-one-7ac4-by-mass-spectrometry
#1
Leslie J Donato, Alan Lueke, Stacy M Kenyon, Jeffrey W Meeusen, Michael Camilleri
BACKGROUND: Imbalance of bile acids (BA) homeostasis in the gastrointestinal tract can lead to chronic diarrhea or constipation when BA in the colon are in excess or low, respectively. Since both disturbances of bowel function can result from other etiologies, identifying BA imbalance is important to tailor treatment strategies. Serum concentrations of 7-alpha-hydroxy-4-cholesten-3-one (7aC4), a precursor in bile acid synthesis, reflect BA homeostasis. Here we describe a method to accurately measure serum 7aC4 and evaluate the clinical utility in patients with diarrhea or constipation phenotypes...
October 16, 2017: Clinical Biochemistry
https://www.readbyqxmd.com/read/28980151/epidemiology-diagnosis-and-treatment-of-cerebrotendinous-xanthomatosis-ctx
#2
REVIEW
Gerald Salen, Robert D Steiner
Cerebrotendinous xanthomatosis (CTX) is a rare autosomal recessive disorder of bile acid synthesis caused by mutations in the cytochrome P450 CYP27A1 gene that result in production of a defective sterol 27-hydroxylase enzyme. CTX is associated with abnormally high levels of cholestanol in the blood and accumulation of cholestanol and cholesterol in the brain, tendon xanthomas, and bile. Hallmark clinical manifestations of CTX include chronic diarrhea, bilateral cataracts, tendon xanthomas, and neurologic dysfunction...
November 2017: Journal of Inherited Metabolic Disease
https://www.readbyqxmd.com/read/28899465/-clinical-features-and-myo5b-mutations-of-a-family-affected-by-microvillus-inclusion-disease
#3
Ying Cheng, Hong Liang, Na-Li Cai, Li Guo, Yu-Ge Huang, Yuan-Zong Song
Microvillus inclusion disease (MVID) is an autosomal recessive disorder caused by biallelic mutations in the MYO5B or STX3 gene. Refractory diarrhea and malabsorption are the main clinical manifestations. The aim of this study was to investigate the clinical features and MYO5B gene mutations of an infant with MVID. A 21-day-old female infant was referred to the hospital with the complaint of diarrhea for 20 days. On physical examination, growth retardation of the body weight and length was found along with moderately jaundiced skin and sclera...
September 2017: Zhongguo Dang Dai Er Ke za Zhi, Chinese Journal of Contemporary Pediatrics
https://www.readbyqxmd.com/read/28898457/organic-solute-transporter-beta-slc51b-deficiency-in-two-brothers-with-congenital-diarrhea-and-features-of-cholestasis
#4
Mutaz Sultan, Anuradha Rao, Orly Elpeleg, Frédéric M Vaz, Bassam Y Abu Libdeh, Saul J Karpen, Paul A Dawson
Primary bile acid malabsorption (PBAM) is associated with congenital diarrhea, steatorrhea, and a block in the intestinal return of bile acids in the enterohepatic circulation. Mutations in the ileal Na(+) -dependent bile acid transporter (ASBT; SLC10A2) can cause PBAM, but do not appear to account for most familial cases. Another major transporter involved in the intestinal reclamation of bile acids is the heteromeric Organic Solute Transporter alpha-beta (OSTα-OSTβ; SLC51A-SLC51B), which exports bile acid across the basolateral membrane...
September 12, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28894048/the-role-of-bile-acids-in-the-pathogenesis-of-bowel-diseases
#5
Magdalena Panek-Jeziorna, Agata Mulak
Bile acids not only play a cardinal role in the digestion and absorption of fat and fat-soluble vitamins, but also significantly affect gastrointestinal motor, sensory and secretory functions, intestinal barrier permeability and the regulation of the inflammatory response. The results of recent studies have revealed complex interactions between bile acids and the gut microbiota. In addition, bile acids also play a role of signaling molecules regulating the activity of lipid and glucose metabolic pathways, as well as a role of ligands for transcription factors...
August 24, 2017: Postȩpy Higieny i Medycyny Doświadczalnej
https://www.readbyqxmd.com/read/28872123/ileectomy-induced-bile-overaccumulation-in-mouse-intestine
#6
Rongli Zhang, Jonathan W Ray, Mukesh K Jain, Shuxin Han
Intestinal resection is a common therapeutic approach for human diseases such as obesity, inflammatory bowel disease, Crohn's disease, and colon cancer that often results in severe short bowel syndrome-like adverse effects including bile acid diarrhea, dehydration, electrolyte disturbances, and nutrient malabsorption. Here we introduce a murine ileal resection model, termed ileectomy, to evaluate tissue communication and the maintenance of systemic homeostasis. After ileal resection, circulating blood is permanently devoid of the ileum-specific endocrine hormone fibroblast growth factor 15 (FGF15), which releases its endocrinal inhibition of bile acid synthesis in the liver...
August 21, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28840422/determining-an-optimal-clinical-dose-of-elobixibat-a-novel-inhibitor-of-the-ileal-bile-acid-transporter-in-japanese-patients-with-chronic-constipation-a-phase-ii-multicenter-double-blind-placebo-controlled-randomized-clinical-trial
#7
Atsushi Nakajima, Mitsunori Seki, Shinya Taniguchi
BACKGROUND: Elobixibat is an oral treatment candidate for chronic constipation with a novel mechanism of action via inhibition of the ileal bile acid transporter. We performed this randomized, double-blind, placebo-controlled, dose-finding phase IIb study in Japanese patients with chronic constipation to determine the optimal clinical dose of elobixibat. METHODS: Japanese patients with chronic constipation were randomized to receive elobixibat (5, 10, or 15 mg) or placebo once daily for 2 weeks...
August 24, 2017: Journal of Gastroenterology
https://www.readbyqxmd.com/read/28794309/enteral-formula-containing-egg-yolk-lecithin-improves-diarrhea
#8
Tetsuro Akashi, Ayano Muto, Yayoi Takahashi, Hiroshi Nishiyama
Diarrhea often occurs during enteral nutrition. Recently, several reports showed that diarrhea improves by adding egg yolk lecithin, an emulsifier, in an enteral formula. Therefore, we evaluated if this combination could improve diarrhea outcomes. We retrospectively investigated the inhibitory effects on watery stools by replacing a polymeric fomula with that containing egg yolk lecithin. Then, we investigated the emulsion stability in vitro. Next, we examined the lipid absorption using different emulsifiers among bile duct-ligated rats and assessed whether egg yolk lecithin, medium-chain triglyceride, and dietary fiber can improve diarrhea outcomes in a rat model of short bowel syndrome...
August 8, 2017: Journal of Oleo Science
https://www.readbyqxmd.com/read/28790208/pathogenicity-locus-core-genome-and-accessory-gene-contributions-to-clostridium-difficile-virulence
#9
Brittany B Lewis, Rebecca A Carter, Lilan Ling, Ingrid Leiner, Ying Taur, Mini Kamboj, Erik R Dubberke, Joao Xavier, Eric G Pamer
Clostridium difficile is a spore-forming anaerobic bacterium that causes colitis in patients with disrupted colonic microbiota. While some individuals are asymptomatic C. difficile carriers, symptomatic disease ranges from mild diarrhea to potentially lethal toxic megacolon. The wide disease spectrum has been attributed to the infected host's age, underlying diseases, immune status, and microbiome composition. However, strain-specific differences in C. difficile virulence have also been implicated in determining colitis severity...
August 8, 2017: MBio
https://www.readbyqxmd.com/read/28765690/diarrhea-after-bariatric-procedures-diagnosis-and-therapy
#10
REVIEW
Yves M Borbély, Alice Osterwalder, Dino Kröll, Philipp C Nett, Roman A Inglin
Diarrhea after bariatric procedures, mainly those with malabsorptive elements including Roux-Y Gastric Bypass and Biliopancreatic Diversion, is common and an essential determinant of quality of life and micro- and macronutrient deficiencies. Bariatric surgery is the only sustainably successful method to address morbid obesity and its comorbidities, particularly gaining more and more importance in the specific treatment of diabetic patients. Approximately half a million procedures are annually performed around the world, with numbers expected to rise drastically in the near future...
July 14, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28672432/pros-and-cons-while-looking-through-an-asian-window-on-the-rome-iv-criteria-for-irritable-bowel-syndrome-pros
#11
REVIEW
Uday C Ghoshal
A decade after Rome III, in 2016, Rome IV criteria were published. There are major differences between Rome IV and the earlier iteration, some of which are in line with Asian viewpoints. The clinical applicability of the Rome IV criteria of irritable bowel syndrome (IBS) in Asian perspective is reviewed here. Instead of considering functional gastrointestinal disorders (FGIDs) to be largely psychogenic, Rome IV suggested the importance of the gut over brain ("disorders of gut-brain interaction" not "brain-gut interaction")...
July 30, 2017: Journal of Neurogastroenterology and Motility
https://www.readbyqxmd.com/read/28590052/clinical-report-a-patient-with-a-late-diagnosis-of-cerebrotendinous-xanthomatosis-and-a-response-to-treatment
#12
Ahmad Alhariri, Katherine Hamilton, Vikash Oza, Kelly Cordoro, Nara L Sobreira, Mary Malloy, Anne Slavotinek
Cerebrotendinous xanthomatosis (CTX) is a rare, autosomal recessive, inborn error of bile acid metabolism characterized by diarrhea in infancy, juvenile cataracts in childhood, tendon xanthomas developing in the second to third decades of life, and progressive neurologic dysfunction in adulthood. The condition is caused by mutations in the CYP27A1 gene that result in decreased production of chenodeoxycholic acid (CDCA) and elevated levels of cholestanol and bile alcohols. We present a 36-year-old male of Han ethnicity who developed xanthomas of his Achilles tendons and suffered neurocognitive declines and gait deterioration in his second decade...
August 2017: American Journal of Medical Genetics. Part A
https://www.readbyqxmd.com/read/28573213/chemoproteomic-profiling-of-bile-acid-interacting-proteins
#13
Shentian Zhuang, Qiang Li, Lirong Cai, Chu Wang, Xiaoguang Lei
Bile acids (BAs) are a family of endogenous metabolites synthesized from cholesterol in liver and modified by microbiota in gut. Being amphipathic molecules, the major function of BAs is to help with dietary lipid digestion. In addition, they also act as signaling molecules to regulate lipid and glucose metabolism as well as gut microbiota composition in the host. Remarkably, recent discoveries of the dedicated receptors for BAs such as FXR and TGR5 have uncovered a number of novel actions of BAs as signaling hormones which play significant roles in both physiological and pathological conditions...
May 24, 2017: ACS Central Science
https://www.readbyqxmd.com/read/28554966/the-yin-and-yang-of-bile-acid-action-on-tight-junctions-in-a-model-colonic-epithelium
#14
Jayashree Sarathy, Sally Jo Detloff, Mei Ao, Nabihah Khan, Sydney French, Hafsa Sirajuddin, Tanushree Nair, Mrinalini C Rao
Gastrointestinal epithelial barrier loss due to tight junction (TJ) dysfunction and bile acid-induced diarrhea are common in patients with inflammatory diseases. Although excess colonic bile acids are known to alter mucosal permeability, few studies have compared the effects of specific bile acids on TJ function. We report that the primary bile acid, chenodeoxycholic acid (CDCA), and its 7α-dehydroxylated derivative, lithocholic acid (LCA) have opposite effects on epithelial integrity in human colonic T84 cells...
May 2017: Physiological Reports
https://www.readbyqxmd.com/read/28515290/a-point-mutation-in-the-rhesus-rotavirus-vp4-protein-generated-through-a-rotavirus-reverse-genetics-system-attenuates-biliary-atresia-in-the-murine-model
#15
Sujit K Mohanty, Bryan Donnelly, Phylicia Dupree, Inna Lobeck, Sarah Mowery, Jaroslaw Meller, Monica McNeal, Greg Tiao
Rotavirus infection is one of the most common causes of diarrheal illness in humans. In neonatal mice, rhesus rotavirus (RRV) can induce biliary atresia (BA), a disease resulting in inflammatory obstruction of the extrahepatic biliary tract and intrahepatic bile ducts. We previously showed that the amino acid arginine (R) within the sequence SRL (amino acids 445 to 447) in the RRV VP4 protein is required for viral binding and entry into biliary epithelial cells. To determine if this single amino acid (R) influences the pathogenicity of the virus, we generated a recombinant virus with a single amino acid mutation at this site through a reverse genetics system...
August 1, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28484432/rice-bran-and-probiotics-alter-the-porcine-large-intestine-and-serum-metabolomes-for-protection-against-human-rotavirus-diarrhea
#16
Nora Jean Nealon, Lijuan Yuan, Xingdong Yang, Elizabeth P Ryan
Human rotavirus (HRV) is a leading cause of severe childhood diarrhea, and there is limited vaccine efficacy in the developing world. Neonatal gnotobiotic pigs consuming a prophylactic synbiotic combination of probiotics and rice bran (Pro+RB) did not exhibit HRV diarrhea after challenge. Multiple immune, gut barrier protective, and anti-diarrheal mechanisms contributed to the prophylactic efficacy of Pro+RB when compared to probiotics (Pro) alone. In order to understand the molecular signature associated with diarrheal protection by Pro+RB, a global non-targeted metabolomics approach was applied to investigate the large intestinal contents and serum of neonatal gnotobiotic pigs...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28424615/huangqin-decoction-attenuates-cpt-11-induced-gastrointestinal-toxicity-by-regulating-bile-acids-metabolism-homeostasis
#17
Xu Wang, Dong-Ni Cui, Xiao-Min Dai, Jing Wang, Wei Zhang, Zun-Jian Zhang, Feng-Guo Xu
Irinotecan (CPT-11) is a potent chemotherapeutic agent, however, its clinical usage is often limited by the induction of severe gastrointestinal (GI) toxicity, especially late-onset diarrhea. HuangQin Decoction (HQD), commonly used for the treatment of GI ailments, has been proved could significantly ameliorate the intestinal toxicity of CPT-11. To reveal the mechanisms of CPT-11-induced toxicity and the modulation effects of HQD, a previous untargeted metabolomics study was performed and the results indicated that HQD may protect the GI tract by altering the metabolism of bile acids (BAs)...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28356078/calcium-oxalate-crystal-related-kidney-injury-in-a-patient-receiving-roux-en-y-hepaticojejunostomy-due-to-gall-bladder-cancer
#18
Jun-Li Tsai, Shang-Feng Tsai
BACKGROUND: Calcium oxalate nephropathy is rare in current practice. It was a common complication during jejunoileal bypass, but much less seen in modern gastric bypass surgery for morbid obesity. The major cause of it is enteric hyperoxaluria. CASE PRESENTATION: We report on a patient here with acute kidney disease due to calcium oxalate nephropathy, rather than the conditions mentioned above. The male patient received a Roux-en Y hepaticojejunostomy and common bile duct drainage...
March 29, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28316592/influence-of-stress-factors-related-to-cheese-making-process-and-to-stec-detection-procedure-on-the-induction-of-stx-phages-from-stec-o26-h11
#19
Ludivine Bonanno, Benjamin Delubac, Valérie Michel, Frédéric Auvray
Shiga toxin-producing Escherichia coli (STEC) are responsible for human infections, ranging from mild watery diarrhea to hemorrhagic colitis (CH) that may be complicated by hemolytic uremic syndrome (HUS). The main STEC virulence factor is Shiga toxin encoded by the stx gene, located in the genome of a bacteriophage integrated into the bacterial chromosome. The serotype O26:H11 is the second HUS-causing serotype worldwide (after O157:H7), and the first found in dairy products such as raw-milk cheeses. A small number of HUS cases identified each year in France are caused by serotype O26:H11...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28288854/irinotecan-induced-bile-acid-malabsorption-is-associated-with-down-regulation-of-ileal-asbt-slc10a2-in-mice
#20
A-Xi Shi, Yan Zhou, Xiao-Yi Zhang, Yan-Shu Zhao, Hong-Yan Qin, Yan-Ping Wang, Xin-An Wu
Irinotecan, (CPT-11), an antitumor agent primarily used for the treatment of solid tumors, has often compromised clinical application due to the inducement of severe delay-onset diarrhea. Bile acid malabsorption (BAM) is widely accepted as the common cause of diarrhea. However, whether CPT-11-induced diarrhea has correlation with BAM is unknown. The aim of this study was to investigate the effect of CPT-11 on the bile acid homeostasis in mice. The mice were administrated with CPT-11 intravenously for four consecutive days...
March 10, 2017: European Journal of Pharmaceutical Sciences
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