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https://www.readbyqxmd.com/read/28219198/-effects-and-mechanisms-of-ursodeoxycholic-acid-on-isoprenaline-induced-myocardial-fibrosis-in-mice
#1
X Li, K Q Han, Y N Shi, S Z Men, S Li, M H Sun, H Dong, J J Lu, L J Ma, M Zhao, D Li, W Liu
Objective: To investigate the effects and possible mechanisms of ursodeoxycholic acid (UDCA) on myocardial fibrosis in mice. Method: To observe the expression of transforming growth factor(TGF) -β1, CTGF, MMPs and the degree of myocardial fibrosis, 61 male Kunming mice were randomly divided into normal group, low dose UDCA group, high dose of UDCA group, spironolactone group, and the control group.Isoproterenol (ISO) injection was given subcutaneously (30 d) to make the model of myocardial fibrosis.Corresponding anti-fibrosis drugs (UDCA or spironolactone) were given by gavage...
February 7, 2017: Zhonghua Yi Xue za Zhi [Chinese medical journal]
https://www.readbyqxmd.com/read/28213609/gut-microbial-profile-is-altered-in-primary-biliary-cholangitis-and-partially-restored-after-udca-therapy
#2
Ruqi Tang, Yiran Wei, Yanmei Li, Weihua Chen, Haoyan Chen, Qixia Wang, Fan Yang, Qi Miao, Xiao Xiao, Haiyan Zhang, Min Lian, Xiang Jiang, Jun Zhang, Qin Cao, Zhuping Fan, Maoying Wu, Dekai Qiu, Jing-Yuan Fang, Aftab Ansari, M Eric Gershwin, Xiong Ma
OBJECTIVE: A close relationship between gut microbiota and some chronic liver disorders has recently been described. Herein, we systematically performed a comparative analysis of the gut microbiome in primary biliary cholangitis (PBC) and healthy controls. DESIGN: We first conducted a cross-sectional study of 60 ursodeoxycholic acid (UDCA) treatment-naïve patients with PBC and 80 matched healthy controls. Second, an independent cohort composed of 19 treatment-naïve patients and 34 controls was used to validate the results...
February 17, 2017: Gut
https://www.readbyqxmd.com/read/28202805/chenodeoxycholic-acid-stimulates-glucagon-like-peptide-1-secretion-in-patients-after-roux-en-y-gastric-bypass
#3
Signe Nielsen, Maria S Svane, Rune E Kuhre, Trine R Clausen, Viggo B Kristiansen, Jens F Rehfeld, Jens J Holst, Sten Madsbad, Kirstine N Bojsen-Moller
Postprandial secretion of glucagon-like peptide-1 (GLP-1) is enhanced after Roux-en-Y gastric bypass (RYGB), but the precise molecular mechanisms explaining this remain poorly understood. Plasma concentrations of bile acids (BAs) increase after RYGB, and BAs may act as molecular enhancers of GLP-1 secretion through activation of TGR5-receptors. We aimed to evaluate GLP-1 secretion after oral administration of the primary bile acid chenodeoxycholic acid (CDCA) and the secondary bile acid ursodeoxycholic acid (UDCA) (which are available for oral use) in RYGB-operated participants...
February 2017: Physiological Reports
https://www.readbyqxmd.com/read/28185534/effect-of-inhibition-of-intestinal-cholesterol-absorption-on-the-prevention-of-cholesterol-gallstone-formation
#4
Piero Portincasa, David Q-H Wang
BACKGROUND: Cholesterol cholelithiasis is a multifactorial hepatobiliary disease. METHODS: Interactions between genetic and environmental factors play a critical role in biliary cholesterol homeostasis and its imbalance enhances cholelithogenesis. RESULTS: In patients developing symptoms or complications of gallstone disease, laparoscopic cholecystectomy is recommended for treatment of gallstones. In a subgroup of patients with small, radiolucent pure cholesterol gallstones, the hydrophilic bile acid, ursodeoxycholic acid (UDCA) is still considered only pharmacological therapy able to induce oral litholysis...
February 9, 2017: Medicinal Chemistry
https://www.readbyqxmd.com/read/28165825/chemoprevention-of-colorectal-cancer-in-ulcerative-colitis-digging-deep-in-current-evidence
#5
Cristina Bezzio, Stefano Festa, Simone Saibeni, Claudio Papi
Patients with ulcerative colitis (UC) have an increased risk of developing colorectal cancer (CRC). Surveillance colonoscopy is currently recommended for patients with long-standing extensive colitis for reducing CRC risk. Chemoprevention is an attractive complementary strategy. Areas covered: Inflammation is a major determinant of CRC risk and is potentially modifiable. Reducing inflammation is supposed to reduce CRC risk. Several medications have been evaluated in this setting: 5-ASA, thiopurines, anti-TNFα agents and ursodeoxycholic acid (UCDA) in patients with associated primary sclerosing cholangitis (PSC)...
February 6, 2017: Expert Review of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28127564/ursodeoxycholic-acid-attenuates-endoplasmic-reticulum-stress-related-retinal-pericyte-loss-in-streptozotocin-induced-diabetic-mice
#6
Yoo-Ri Chung, Jeong A Choi, Jae-Young Koh, Young Hee Yoon
Loss of pericytes, an early hallmark of diabetic retinopathy (DR), results in breakdown of the blood-retinal barrier. Endoplasmic reticulum (ER) stress may be involved in this process. The purpose of this study was to examine the effects of ursodeoxycholic acid (UDCA), a known ameliorator of ER stress, on pericyte loss in DR of streptozotocin- (STZ-) induced diabetic mice. To assess the extent of DR, the integrity of retinal vessels and density of retinal capillaries in STZ-induced diabetic mice were evaluated...
2017: Journal of Diabetes Research
https://www.readbyqxmd.com/read/28118581/validated-spectrophotometric-and-rp-hplc-dad-methods-for-the-determination-of-ursodeoxycholic-acid-based-on-derivatization-with-2-nitrophenylhydrazine
#7
Dina S El-Kafrawy, Tarek S Belal, Mohamed S Mahrous, Magdi M Abdel-Khalek, Amira H Abo-Gharam
This work describes the development, validation, and application of two simple, accurate, and reliable methods for thedetermination of ursodeoxycholic acid (UDCA) in bulk powder and in pharmaceutical dosage forms. The carboxylic acid group in UDCA was exploited for the development of these novel methods. Method 1 is the colorimetric determination of the drug based on its reaction with 2-nitrophenylhydrazine hydrochloride in the presence of a water-soluble carbodiimide coupler [1-ethyl-3-(3-dimethylaminopropyl)-carbodiimide hydrochloride] and pyridine to produce an acid hydrazide derivative, which ionizes to yield an intense violet color with maximum absorption at 553 nm...
December 23, 2016: Journal of AOAC International
https://www.readbyqxmd.com/read/28116898/engineering-7%C3%AE-hydroxysteroid-dehydrogenase-for-enhanced-ursodeoxycholic-acid-production-by-multiobjective-directed-evolution
#8
Ming-Min Zheng, Ke-Cai Chen, Ru-Feng Wang, Hao Li, Chun-Xiu Li, Jian-He Xu
Ursodeoxycholic acid (UDCA) is the main active ingredient of natural bear bile powder with multiple pharmacological functions. 7β-Hydroxysteroid dehydrogenase (HSDH) is a key biocatalyst for the synthesis of UDCA. However, all the 7β-HSDHs reported commonly suffer from poor activity and thermostability, resulting in limited productivity of UDCA. In this study, a multiobjective directed evolution (MODE) strategy was proposed and applied to improve the activity, thermostability, and pH optimum of a 7β-HSDH...
February 3, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28115375/ursodeoxycholic-acid-and-its-taurine-glycine-conjugated-species-reduce-colitogenic-dysbiosis-and-equally-suppress-experimental-colitis-in-mice
#9
Lien Van den Bossche, Pieter Hindryckx, Lindsey Devisscher, Sarah Devriese, Sophie Van Welden, Tom Holvoet, Ramiro Vilchez-Vargas, Marius Vital, Dietmar H Pieper, Julie Vanden Bussche, Lynn Vanhaecke, Tom Van de Wiele, Martine De Vos, Debby Laukens
: The promising results with secondary bile acids in experimental colitis suggest that they may represent an attractive and safe class of drugs for the treatment of inflammatory bowel diseases (IBD). However, the exact mechanism by which bile acid therapy confers protection from colitogenesis is currently unknown. Since the gut microbiota plays a crucial role in the pathogenesis of IBD, and exogenous bile acid administration may affect the community structure of the microbiota, we examined the impact of the secondary bile acid ursodeoxycholic acid (UDCA) and its taurine/glycine conjugates on the fecal microbial community structure during experimental colitis...
January 23, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/28105259/clinical-usefulness-of-ursodeoxycholic-acid-for-japanese-patients-with-autoimmune-hepatitis
#10
Yuichi Torisu, Masanori Nakano, Keiko Takano, Ryo Nakagawa, Chisato Saeki, Atsushi Hokari, Tomohisa Ishikawa, Masayuki Saruta, Mikio Zeniya
AIM: To evaluate the therapeutic effects of ursodeoxycholic acid (UDCA) on autoimmune hepatitis (AIH). METHODS: A total 136 patients who were diagnosed with AIH were included in our study. All of the patients underwent a liver biopsy, and had at least a probable diagnosis on the basis of either the revised scoring system or the simplified scores. Initial treatment included UDCA monotherapy (Group U, n = 48) and prednisolone (PSL) monotherapy (Group P, n = 88). Group U was further classified into two subgroups according to the effect of UDCA: Patients who had achieved remission induction with UDCA monotherapy and showed no sign of relapse (Subgroup U1, n = 34) and patients who additionally received PSL during follow-up (Subgroup U2, n = 14)...
January 8, 2017: World Journal of Hepatology
https://www.readbyqxmd.com/read/28089591/evaluation-of-incidence-of-cholelithiasis-after-bariatric-surgery-in-subjects-treated-or-not-treated-with-ursodeoxycholic-acid
#11
Muriel Coupaye, Daniela Calabrese, Ouidad Sami, Simon Msika, Séverine Ledoux
BACKGROUND: The use of ursodeoxycholic acid (UDCA) to prevent gallstone formation after gastric bypass (RYGB) is still debated. Furthermore, only 1 study has assessed the effectiveness of UDCA after sleeve gastrectomy (SG) with mitigated results. OBJECTIVES: To compare the incidence of cholelithiasis (CL) between patients treated or not treated with UDCA after RYGB and SG. SETTING: University hospital, France. METHODS: Since January 2008, a postoperative ultrasound monitoring was scheduled for all patients without previous cholecystectomy who underwent bariatric surgery in our institution...
December 2, 2016: Surgery for Obesity and related Diseases: Official Journal of the American Society for Bariatric Surgery
https://www.readbyqxmd.com/read/28060213/ursodeoxycholyl-lysophosphatidylethanolamide-protects-against-cd95-fas-induced-fulminant-hepatitis
#12
Tanyarath Utaipan, Ann-Christin Otto, Hongying Gan-Schreier, Warangkana Chunglok, Anita Pathil, Wolfgang Stremmel, Walee Chamulitrat
Increased activation of CD95/Fas by Fas ligand in viral hepatitis and autoimmunity is involved in pathogenesis of fulminant hepatitis and liver failure. We designed a bile-acid phospholipid conjugate ursodeoxycholyl lysophosphatidylethanolamide (UDCA-LPE with LPE containing oleate at the sn-1) as a hepatoprotectant that was shown to protect against fulminant hepatitis induced by endotoxin. We herein further assessed the ability of UDCA-LPE to prevent death receptor CD95/Fas-induced fulminant hepatitis. C57BL/6 mice were intravenously administered with CD95/Fas agonistic monoclonal antibody (Jo-2) with or without 1 h pretreatment with 50 mg/kg UDCA-LPE...
January 4, 2017: Shock
https://www.readbyqxmd.com/read/28052628/management-of-cholestatic-disease-in-2017
#13
REVIEW
Elsemieke de Vries, Ulrich Beuers
Primary biliary cholangitis (PBC) and primary sclerosing cholangitis (PSC) are the most frequent chronic cholestatic liver diseases and serve as model diseases to discuss the management of cholestasis in 2017 in the lecture that is summarized in this report. PBC and PSC are characterized by inflammation and fibrosis of small intrahepatic (PBC) or larger intra- and/or extrahepatic (PSC) bile ducts. Bile duct damage leads to cholestasis and can progress to liver fibrosis and even cirrhosis. Various genetic, environmental and endogenous factors may contribute to the development of chronic cholestatic liver diseases, but the exact pathogenesis of PBC and PSC has not been clarified...
January 2017: Liver International: Official Journal of the International Association for the Study of the Liver
https://www.readbyqxmd.com/read/28049946/ursodeoxycholic-acid-ameliorates-intrahepatic-cholestasis-independent-of-biliary-bicarbonate-secretion-in-vil2-kd-kd-mice
#14
Ryo Hatano, Kotoku Kawaguchi, Fumitaka Togashi, Masato Sugata, Shizuka Masuda, Shinji Asano
Ursodeoxycholic acid (UDCA) is a hydrophilic bile acid that possesses many pharmacological effects, including increasing bile flow, changing the hydrophobicity of the bile acid pool, and modulation of the immune response. UDCA has been approved for treating cholestatic liver disease, such as primary biliary cholangitis. However, several unanticipated severe side effects of UDCA are observed in cholestatic patients, and its pharmacological benefits remain controversial. We reported that ezrin-knockdown (Vil2(kd/kd)) mice exhibited severe hepatic injury because of a functional disorder in bile duct fluidity and alkalinity regulation, resembling human intrahepatic cholestatic disease...
2017: Biological & Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/27988401/geniposide-attenuates-anit-induced-cholestasis-through-regulation-of-transporters-and-enzymes-involved-in-bile-acids-homeostasis-in-rats
#15
Lingling Wang, Guixin Wu, Feihua Wu, Nan Jiang, Yining Lin
ETHNOPHARMACOLOGICAL RELEVANCE: Geniposide (GE) is one of the major iridoid glycosides isolated from the fruit of Gardenia jasminoides Ellis that has been used to treat hepatic disorders including cholestasis. However, the underlying mechanisms for GE ameliorating the reduction in bile acids accumulation by α-naphthylisothiocyanate (ANIT) remain unclear. AIM OF THE STUDY: The purpose of this study is to characterize the efficacy of GE in regulation of bile acids uptake, synthesis, metabolism, and transport in ANIT-induced rats...
January 20, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/27981592/the-ascending-pathophysiology-of-cholestatic-liver-disease
#16
REVIEW
Peter L M Jansen, Ahmed Ghallab, Nachiket Vartak, Raymond Reif, Frank G Schaap, Jochen Hampe, Jan G Hengstler
In this review we develop the argument that cholestatic liver diseases, particularly primary biliary cholangitis and primary sclerosing cholangitis (PSC), evolve over time with anatomically an ascending course of the disease process. The first and early lesions are in "downstream" bile ducts. This eventually leads to cholestasis, and this causes bile salt (BS)-mediated toxic injury of the "upstream" liver parenchyma. BS are toxic in high concentration. These concentrations are present in the canalicular network, bile ducts, and gallbladder...
February 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/27981301/a-triple-blinded-randomized-placebo-controlled-clinical-trial-to-evaluate-the-efficacy-and-safety-of-oral-vancomycin-in-primary-sclerosing-cholangitis-a-pilot-study
#17
Shahab Rahimpour, Mohsen Nasiri-Toosi, Hossein Khalili, Nasser Ebrahimi-Daryani, Mohammad Kazem Nouri-Taromlou, Zahra Azizi
BACKGROUND AND AIM: Recent studies have suggested the therapeutic effect of antimicrobial agents on primary sclerosing cholangitis (PSC). Therefore, we aimed to evaluate the efficacy of oral vancomycin in patients with PSC. METHOD: A triple blinded, randomized, placebo-controlled trial was performed on 29 patients (2015-2016) in the Imam Khomeini Hospital, Tehran, Iran (NCT02605213). Patients were divided into two groups by simple randomization method: placebo 11 (37...
December 2016: Journal of Gastrointestinal and Liver Diseases: JGLD
https://www.readbyqxmd.com/read/27915491/the-effects-of-changes-in-glutathione-levels-through-exogenous-agents-on-intracellular-cysteine-content-and-protein-adduct-formation-in-chronic-alcohol-treated-vl17a-cells
#18
S Mathan Kumar, Madhumitha Haridoss, Kavitha Swaminathan, Ramesh Kumar Gopal, Dahn Clemens, Aparajita Dey
Alcohol-mediated liver injury is associated with changes in the level of the major cellular antioxidant glutathione (GSH). It is interesting to investigate if the changes in intracellular GSH level through exogenous agents affect the intracellular cysteine content and the protein adduct formation indicative of oxidative insult in chronic alcohol treated liver cells. In VL-17A cells treated with 2 mM N-acetyl cysteine (NAC) or 0.1 mM ursodeoxycholic acid (UDCA) plus 100 mM ethanol, an increase in cysteine concentration which was accompanied by decreases in hydroxynonenal (HNE) and glutathionylated protein adducts were observed...
December 21, 2016: Toxicology Mechanisms and Methods
https://www.readbyqxmd.com/read/27913155/early-molecular-stratification-of-high-risk-primary-biliary-cholangitis
#19
Claire Hardie, Kile Green, Laura Jopson, Ben Millar, Barbara Innes, Sarah Pagan, Dina Tiniakos, Jessica Dyson, Muzlifah Haniffa, Venetia Bigley, David E Jones, John Brain, Lucy J Walker
High-risk primary biliary cholangitis (PBC), defined by inadequate response at one year to Ursodeoxycholic acid (UDCA), is associated with disease progression and liver transplantation. Stratifying high-risk patients early would facilitate improved approaches to care. Using long-term follow-up data to define risk at presentation, 6 high-risk PBC patients and 8 low-risk patients were identified from biopsy, transplant and biochemical archival records. Formalin-fixed paraffin-embedded (FFPE) liver biopsies taken at presentation were graded (Scheuer and Nakanuma scoring) and gene expression analysed using the NanoString® nCounter PanCancer Immunity 770-gene panel...
December 2016: EBioMedicine
https://www.readbyqxmd.com/read/27906472/long-term-clinical-impact-and-cost-effectiveness-of-obeticholic-acid-for-the-treatment-of-primary-biliary-cholangitis
#20
Sumeyye Samur, Matthew Klebanoff, Reiner Banken, Daniel S Pratt, Rick Chapman, Daniel A Ollendorf, Anne M Loos, Kathleen Corey, Chin Hur, Jagpreet Chhatwal
: Primary biliary cholangitis (PBC) is a chronic, progressive autoimmune liver disease that mainly affects middle-aged women. Obeticholic acid (OCA), which was recently approved by the Food and Drug Administration for PBC treatment, has demonstrated positive effects on biochemical markers of liver function. Our objective was to evaluate the long-term clinical impact and cost-effectiveness of OCA as a second-line treatment for PBC in combination with ursodeoxycholic acid (UDCA) in adults with an inadequate response to UDCA...
November 7, 2016: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
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