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https://www.readbyqxmd.com/read/28650239/use-of-gadoxetic-acid-for-computed-tomographic-cholangiography-in-healthy-dogs
#1
Jennifer Chau, Juan M Podadera, Alex C Young, Mariano A Makara
OBJECTIVE To evaluate the effect of gadoxetic acid (contrast) dose on biliary tract enhancement, determine the optimal time after contrast injection for CT image acquisition, and assess the feasibility of CT cholangiography in sedated dogs. ANIMALS 8 healthy dogs. PROCEDURES The study had 2 parts. In part 1, 4 dogs were anesthetized and underwent CT cholangiography twice. Gadoxetic acid was administered IV at a low dose (0.025 mmol/kg) for the first procedure and high dose (0.3 mmol/kg) for the second procedure...
July 2017: American Journal of Veterinary Research
https://www.readbyqxmd.com/read/28645914/bile-salt-homeostasis-in-normal-and-bsep-gene-knock-out-rats-with-single-and-repeated-doses-of-troglitazone
#2
Yaofeng Cheng, Shenjue Chen, Chris Freeden, Weiqi Chen, Yueping Zhang, Pamela Abraham, David Nelson, William G Humphreys, Jinpin Gan, Yurong Lai
The interference of bile acid secretion through bile salt export pump (BSEP) inhibition was one of the mechanisms for troglitazone (TGZ) induced hepatotoxicity. Here we investigated the impact of single or repeated oral doses of TGZ (200 mg/kg/day, 7 days) on bile acid homoeostasis in wild-type (WT) and Bsep KO rats. Following oral doses, plasma exposures of TGZ were not different between WT and KO rats, and were similar on Day-1 and Day-7. However, plasma exposures of the major metabolite, troglitazone sulfate (TS), in KO rats were 7...
June 23, 2017: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/28644197/preoperative-regional-maximal-removal-rate-of-technetium-99m-galactosyl-human-serum-albumin-is-correlated-with-liver-functional-parameters-but-did-not-predict-postoperative-morbidity
#3
Koichi Yano, Atsushi Nanashima, Yoshiro Fujii, Masahide Hiyoshi, Naoya Imamura, Takeomi Hamada, Yuki Tsuchimochi, Takashi Wada, Yoichi Mizutani, Toshinori Hirai
BACKGROUND: Recently, posthepatectomy complications have been predicted by advances of new liver functional parameters, and the technetium-99m-galactosyl human serum albumin (GSA) liver scintigraphy has been applied widely for this purpose. We evaluated the clinical significance of the regional maximal removal rate (GSA-Rmax) in patients with various liver diseases as predictors of posthepatectomy complications. PATIENTS AND METHODS: Between 2012 and March 2016, we examined 200 patients who underwent hepatectomy for liver and biliary diseases...
June 22, 2017: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/28640288/prognostic-factors-for-transplant-free-survival-and-validation-of-prognostic-models-in-chinese-patients-with-primary-biliary-cholangitis-receiving-ursodeoxycholic-acid
#4
Ka-Shing Cheung, Wai-Kay Seto, James Fung, Ching-Lung Lai, Man-Fung Yuen
OBJECTIVES: We aimed to validate the prognostic models for primary biliary cholangitis (PBC) in Chinese patients receiving ursodeoxycholic acid (UCDA), and to compare their performances in predicting the long-term survival. METHODS: Chinese patients with PBC from a tertiary center were identified via electronic search of hospital medical registry. Risk factors associated with adverse events (liver transplantation or death from liver-related causes including hepatocellular carcinoma (HCC) and liver decompensation) were determined...
June 22, 2017: Clinical and Translational Gastroenterology
https://www.readbyqxmd.com/read/28638347/bile-acids-do-not-contribute-to-the-altered-calcium-homeostasis-of-platelets-from-rats-with-biliary-cirrhosis
#5
Paola Romecín, Esther G Navarro, M Clara Ortiz, David Iyú, Joaquín García-Estañ, Noemí M Atucha
Previously, we have found that intracellular calcium homeostasis is altered in platelets from an experimental model of liver cirrhosis, the bile-duct ligated (BDL) rat; these alterations are compatible with the existence of a hypercoagulable state and related to an enhanced intracellular calcium release evoked by thrombin and an increased amount of calcium stored in the intracellular organelles. In the present study we have investigated the role of bile acids in those alterations of the BDL cirrhotic model...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28636236/assessment-of-silibinin-as-a-potential-antifungal-agent-and-investigation-of-its-mechanism-of-action
#6
Dae Gyu Yun, Dong Gun Lee
Silibinin, which is derived from Silybum marianum (milk thistle), has used as a traditional remedy for liver or biliary disorders and known to have superior antioxidant activity. In addition, silibinin was recently reported to have antifungal effect related to fungal apoptosis against Candida albicans and the interest in the therapeutic effect is increasing. In this study, we found another mode of antifungal action of silibinin and its antibiofilm activity on C. albicans. To investigate influence on fungal plasma membrane, propidium iodide and bis-(1, 3-dibutylbarbituric acid) trimethineoxonol [DiBAC4 (3)] assay were primarily carried out...
June 21, 2017: IUBMB Life
https://www.readbyqxmd.com/read/28634191/cd36-knockout-mice-are-protected-against-lithogenic-diet-induced-gallstones
#7
Yan Xie, Vincenza Cifarelli, Terri Pietka, Elizabeth P Newberry, Susan M Kennedy, Amin Khalifeh-Soltani, Robin Clugston, Kamran Atabai, Nada A Abumrad, Nicholas O Davidson
The scavenger receptor and multiligand transporter CD36 functions to promote cellular free fatty acid uptake and regulates aspects of both hepatic and intestinal cholesterol metabolism. However, the role of CD36 in regulating canalicular and biliary cholesterol transport and secretion is unknown. Here we show that germline Cd36 knockout mice are protected against lithogenic diet (LD) induced gallstones compared to congenic (C57BL6/J) controls. Cd36 knockout mice crossed into congenic L-Fabp knockout mice (DKO mice) demonstrated protection against LD induced gallstones, reversing the susceptibility phenotype observed in L-Fabp knockout mice...
June 20, 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/28630443/chemical-chaperone-tudca-unlike-pba-mitigates-protein-aggregation-efficiently-and-resists-er-and-non-er-stress-induced-hepg2-cell-death
#8
Jagadeesh Kumar Uppala, Amina R Gani, Kolluru V A Ramaiah
Stress induced BSA (bovine serum albumin) protein aggregation is effectively mitigated in vitro by TUDCA (tauroursodeoxycholic acid) than by PBA (4- phenylbutyric acid), chemical chaperones approved by FDA for the treatment of biliary cirrhosis and urea cycle disorders respectively. TUDCA, unlike PBA, enhances trypsin mediated digestion of BSA. TUDCA activates PERK, an ER-resident kinase that phosphorylates the alpha-subunit of eukaryotic initiation factor2 (eIF2α) and promotes the expression of activated transcription factor 4 (ATF4) in HepG2 cells...
June 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28625681/variation-of-calcium-copper-and-iron-levels-in-serum-bile-and-stone-samples-of-patients-having-different-types-of-gallstone-a-comparative-study
#9
Mustafa Khan, Tasneem Gul Kazi, Hassan Imran Afridi, Sirajuddin, Muhammad Bilal, Asma Akhtar, Sabir Khan, Salma Kadar
BACKGROUND: Epidemiological data among the human population has shown a significantly increased incidence of gallstone (GS) disease worldwide. It was studied that some essential (calcium) and transition elements (iron and copper) in bile play an important role in the development of GS. METHOD: The estimation of calcium, copper and iron were carried out in the serum, gall bladder bile and different types of GS (cholesterol, mixed and pigmented) of 172 patients, age ranged 20-55years...
June 15, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28622247/effects-of-portal-hypertension-on-gadoxetic-acid-enhanced-liver-magnetic-resonance-diagnostic-and-prognostic-implications
#10
Ulrika Asenbaum, Ahmed Ba-Ssalamah, Mattias Mandorfer, Richard Nolz, Julia Furtner, Thomas Reiberger, Arnulf Ferlitsch, Klaus Kaczirek, Michael Trauner, Markus Peck-Radosavljevic, Andreas G Wibmer
OBJECTIVE: The aim of this study was to investigate the impact of portal hypertension (PH) on gadoxetic acid-enhanced liver magnetic resonance imaging (MRI) and assess diagnostic and prognostic implications in comparison to established imaging features of PH. MATERIALS AND METHODS: Institutional review board-approved retrospective study of 178 patients (142 men; median age, 59.4 years) with chronic liver disease undergoing MRI and hepatic venous pressure gradient (HVPG) measurement between January 2008 and April 2015...
June 16, 2017: Investigative Radiology
https://www.readbyqxmd.com/read/28606651/mechanisms-of-bile-acid-mediated-inflammation-in-the-liver
#11
REVIEW
Man Li, Shi-Ying Cai, James L Boyer
Bile acids are synthesized in the liver and are the major component in bile. Impaired bile flow leads to cholestasis that is characterized by elevated levels of bile acid in the liver and serum, followed by hepatocyte and biliary injury. Although the causes of cholestasis have been extensively studied, the molecular mechanisms as to how bile acids initiate liver injury remain controversial. In this chapter, we summarize recent advances in the pathogenesis of bile acid induced liver injury. These include bile acid signaling pathways in hepatocytes as well as the response of cholangiocytes and innate immune cells in the liver in both patients with cholestasis and cholestatic animal models...
June 9, 2017: Molecular Aspects of Medicine
https://www.readbyqxmd.com/read/28604703/cold-induced-conversion-of-cholesterol-to-bile-acids-in-mice-shapes-the-gut-microbiome-and-promotes-adaptive-thermogenesis
#12
Anna Worthmann, Clara John, Malte C Rühlemann, Miriam Baguhl, Femke-Anouska Heinsen, Nicola Schaltenberg, Markus Heine, Christian Schlein, Ioannis Evangelakos, Chieko Mineo, Markus Fischer, Maura Dandri, Claus Kremoser, Ludger Scheja, Andre Franke, Philip W Shaul, Joerg Heeren
Adaptive thermogenesis is an energy-demanding process that is mediated by cold-activated beige and brown adipocytes, and it entails increased uptake of carbohydrates, as well as lipoprotein-derived triglycerides and cholesterol, into these thermogenic cells. Here we report that cold exposure in mice triggers a metabolic program that orchestrates lipoprotein processing in brown adipose tissue (BAT) and hepatic conversion of cholesterol to bile acids via the alternative synthesis pathway. This process is dependent on hepatic induction of cytochrome P450, family 7, subfamily b, polypeptide 1 (CYP7B1) and results in increased plasma levels, as well as fecal excretion, of bile acids that is accompanied by distinct changes in gut microbiota and increased heat production...
June 12, 2017: Nature Medicine
https://www.readbyqxmd.com/read/28583778/-physiopathology-and-management-of-cholestatic-pruritus-in-children
#13
A Thébaut, D Debray, E Gonzales
Pruritus is a disabling symptom accompanying chronic cholestasis. In some cases, refractory pruritus may require invasive therapies including liver transplantation. The pathogenesis of pruritus in cholestatic disease is poorly understood. It may involve a specific neural pathway and several pruritogenic substances such as bile acids, opioids, serotonin, and the more recently identified lysophosphatidic acid. While the therapeutic management of cholestatic pruritus is well established in adult patients, there is no consensus in children, given the difficulty in conducting controlled clinical studies...
June 2, 2017: Archives de Pédiatrie: Organe Officiel de la Sociéte Française de Pédiatrie
https://www.readbyqxmd.com/read/28570655/circulating-fgf19-closely-correlates-with-bile-acid-synthesis-and-cholestasis-in-patients-with-primary-biliary-cirrhosis
#14
Zhanyi Li, Bingliang Lin, Guoli Lin, Yuankai Wu, Yusheng Jie, Xiangyong Li, Brian Ko, Yutian Chong, Jian Luo
BACKGROUND AND AIM: Bile acid (BA) synthesis in the liver is regulated by Fibroblast Growth Factor 19 (FGF19) secreted from the ileum as an enterohepatic feedback mechanism. Although FGF19 mRNA is absent in normal liver, FGF19 gene expression was reported to increase in response to both extrahepatic and intrahepatic cholestasis. The impact of upregulated FGF19 expression on BA synthesis is unclear and the overall role of circulating FGF19 and BA synthesis under cholestatic conditions needs to be further investigated...
2017: PloS One
https://www.readbyqxmd.com/read/28552422/8-methoxypsoralen-disrupts-mdr3-mediated-phospholipids-efflux-and-bile-acid-homeostasis-and-its-relevance-to-hepatotoxicity
#15
Guolin Zhao, Dengqiu Xu, Ziqiao Yuan, Zhenzhou Jiang, Wang Zhou, Zhijian Li, Mengyue Yin, Zhixing Zhou, Luyong Zhang, Tao Wang
Since its discovery in 1987, multidrug resistance 3 P-glycoprotein (MDR3) had recognized to play a crucial role in the translocation of phospholipids from the inner to outer leaflets of bile canalicular membranes. An increasing number of reports suggest that drug-mediated functional disruption of MDR3 is responsible for drug-induced cholestasis. 8-Methoxypsoralen (8-MOP) is used clinically to treat psoriasis, vitiligo and other skin disorders. However, psoralens safety for long-term use is a concern. In the current study, we evaluate 8-MOP's potential hepatotoxicity and effects on bile formation...
May 24, 2017: Toxicology
https://www.readbyqxmd.com/read/28552244/ca-2-signalling-underlying-pancreatitis
#16
REVIEW
J V Gerasimenko, S Peng, T Tsugorka, O V Gerasimenko
In spite of significant scientific progress in recent years, acute pancreatitis (AP) is still a dangerous and in up to 5% of cases deadly disease with no specific cure. It is self-resolved in the majority of cases, but could result in chronic pancreatitis (CP) and increased risk of pancreatic cancer (PC). One of the early events in AP is premature activation of digestive pro-enzymes, including trypsinogen, inside pancreatic acinar cells (PACs) due to an excessive rise in the cytosolic Ca(2+) concentration, which is the result of Ca(2+) release from internal stores followed by Ca(2+) entry through the store operated Ca(2+) channels in the plasma membrane...
May 18, 2017: Cell Calcium
https://www.readbyqxmd.com/read/28546061/primary-biliary-cholangitis-advances-in-management-and-treatment-of-the-disease
#17
Pietro Invernizzi, Annarosa Floreani, Marco Carbone, Marco Marzioni, Antonio Craxi, Luigi Muratori, Umberto Vespasiani Gentilucci, Ivan Gardini, Antonio Gasbarrini, Paola Kruger, Francesco Saverio Mennini, Virginia Ronco, Elena Lanati, Pier Luigi Canonico, Domenico Alvaro
Primary Biliary Cholangitis, previously known as Primary Biliary Cirrhosis, is a rare disease, which mainly affects women in their fifth to seventh decades of life. It is a chronic autoimmune disease characterized by a progressive damage of interlobular bile ducts leading to ductopenia, chronic cholestasis and bile acids retention. Even if the disease usually presents a long asymptomatic phase and a slow progression, in many patients it may progress faster toward cirrhosis and its complications. The 10year mortality is greater than in diseases such as human immunodeficiency virus/Hepatitis C Virus coinfection and breast cancer...
May 8, 2017: Digestive and Liver Disease
https://www.readbyqxmd.com/read/28537561/prediction-of-acute-pancreatitis-in-the-earliest-stages-role-of-biochemical-parameters-and-histopathological-changes
#18
Jacek Baj, Elżbieta Radzikowska, Marcin Maciejewski, Andrzej Dąbrowski, Kamil Torres
For many years, there has been a search for a set of biochemical parameters that could facilitate the assessment of severity, prognosis, and administration of early and appropriate treatment in acute pancreatitis. Administration of treatment within the first 48 hours since admission is associated with many problems of distinguishing patients with a mild form of acute pancreatitis (AP) from those with a severe form of acute pancreatitis. STUDY AIM: To assess the relationship between the extent of change in the concentration of 10 selected biochemical indicators: amylase, lipase, total bilirubin, creatinine, uric acid, aspartate transaminase, alanine transaminase, glucose, magnesium, and iron and histopathological lesions in the pancreas within 2 and 6 hours since induction of AP...
April 30, 2017: Polski Przeglad Chirurgiczny
https://www.readbyqxmd.com/read/28535810/fibrates-for-the-treatment-of-cholestatic-itch-fitch-study-protocol-for-a-randomized-controlled-trial
#19
Ruth Bolier, Elsemieke S de Vries, Albert Parés, Jeltje Helder, E Marleen Kemper, Koos Zwinderman, Ronald P Oude Elferink, Ulrich Beuers
BACKGROUND: Pruritus (itch) is a frequent, burdensome and difficult-to-treat symptom in patients with cholestasis. Fibrates are currently under investigation for the treatment of primary biliary cholangitis in patients with a suboptimal response to ursodeoxycholic acid. Moreover, there is empirical evidence for a possible antipruritic effect. We aim to prove this in a randomized controlled trial, including patients with cholestatic liver diseases other than primary biliary cholangitis that are accompanied by pruritus...
May 23, 2017: Trials
https://www.readbyqxmd.com/read/28518283/branched-chain-amino-acids-for-people-with-hepatic-encephalopathy
#20
REVIEW
Lise Lotte Gluud, Gitte Dam, Iñigo Les, Giulio Marchesini, Mette Borre, Niels Kristian Aagaard, Hendrik Vilstrup
BACKGROUND: Hepatic encephalopathy is a brain dysfunction with neurological and psychiatric changes associated with liver insufficiency or portal-systemic shunting. The severity ranges from minor symptoms to coma. A Cochrane systematic review including 11 randomised clinical trials on branched-chain amino acids (BCAA) versus control interventions has evaluated if BCAA may benefit people with hepatic encephalopathy. OBJECTIVES: To evaluate the beneficial and harmful effects of BCAA versus any control intervention for people with hepatic encephalopathy...
May 18, 2017: Cochrane Database of Systematic Reviews
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