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https://www.readbyqxmd.com/read/28302129/cholesterol-lowing-effect-of-taurine-in-hepg2-cell
#1
Junxia Guo, Ya Gao, Xuelian Cao, Jing Zhang, Wen Chen
BACKGROUND: A number of studies indicate that taurine promotes cholesterol conversion to bile acids by upregulating CYP7A1 gene expression. Few in vitro studies are concerned the concentration change of cholesterol and its product of bile acids, and the molecular mechanism of CYP7A1 induction by taurine. METHODS: The levels of intracellular total cholesterol (TC), free cholesterol (FC), cholesterol ester (EC), total bile acids (TBA) and medium TBA were determined after HepG2 cells were cultured for 24/48 h in DMEM supplemented with taurine at the final concentrations of 1/10/20 mM respectively...
March 16, 2017: Lipids in Health and Disease
https://www.readbyqxmd.com/read/28288854/irinotecan-induced-bile-acid-malabsorption-is-associated-with-down-regulation-of-ileal-asbt-slc10a2-in-mice
#2
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
https://www.readbyqxmd.com/read/28283178/activation-of-constitutive-androstane-receptor-prevents-cholesterol-gallstone-formation
#3
Shihai Cheng, Min Zou, Qinhui Liu, Jiangying Kuang, Jing Shen, Shiyun Pu, Lei Chen, Hong Li, Tong Wu, Rui Li, Yanping Li, Wei Jiang, Zhiyong Zhang, Jinhan He
Cholesterol gallstone disease (CGD) is one of the most common gastrointestinal diseases. Lithogenic hepatic bile secretion precedes the formation of cholesterol gallstones. Constitutive androstane receptor (CAR), a member of nuclear family, plays an important role in cholesterol and bile acid metabolism. To examine whether activation of CAR can prevent cholesterol gallstone formation, we treated C57BL6/J mice maintained on a lithogenic diet with CAR agonist 1,4-bis-[2-(3, 5-dichlorpyridyloxy)] benzene and performed bile duct cannulation to study the dynamics of biliary lipids...
April 2017: American Journal of Pathology
https://www.readbyqxmd.com/read/28275692/endoplasmic-reticulum-stress-regulates-hepatic-bile-acid-metabolism-in-mice
#4
Anne S Henkel, Brian LeCuyer, Shantel Olivares, Richard M Green
BACKGROUND & AIMS: Cholestasis promotes endoplasmic reticulum (ER) stress in the liver, however, the effect of ER stress on hepatic bile acid metabolism is unknown. We aim to determine the effect of ER stress on hepatic bile acid synthesis and transport in mice. METHODS: ER stress was induced pharmacologically in C57BL/6J mice and human hepatoma (HepG2) cells. The hepatic expression of genes controlling bile acid synthesis and transport was determined. To measure the activity of the primary bile acid synthetic pathway, the concentration of 7α-hydroxy-4-cholesten-3-1 was measured in plasma...
March 2017: Cellular and Molecular Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28275691/targeting-the-enterohepatic-bile-acid-signaling-induces-hepatic-autophagy-via-a-cyp7a1-akt-mtor-axis-in-mice
#5
Yifeng Wang, Yifeng Ding, Jibiao Li, Hemantkumar Chavan, David Matye, Hong-Min Ni, John Y L Chiang, Partha Krishnamurthy, Wen-Xing Ding, Tiangang Li
BACKGROUND & AIMS: Hepatic cholesterol accumulation and autophagy defects contribute to hepatocyte injury in fatty liver disease. Bile acid synthesis is a major pathway for cholesterol catabolism in the liver. This study aims to understand the molecular link between cholesterol and bile acid metabolism and hepatic autophagy activity. METHODS: The effects of cholesterol and cholesterol 7α-hydroxylase (CYP7A1) expression on autophagy and lysosome function were studied in cell models...
March 2017: Cellular and Molecular Gastroenterology and Hepatology
https://www.readbyqxmd.com/read/28251657/hypolipidemic-effect-and-mechanism-of-paprika-seed-oil-on-sprague-dawley-rats
#6
Xuhui Chen, Yongbo Ding, Jiaxin Song, Jianquan Kan
BACKGROUND: The functional properties of paprika seed oil are relatively lack, the hyperlipidemic effects and mechanisms of paprika seed oil on Sprague-Dawley rats are explored, which may improve the usage of paprika seed source and provide a theoretical basis of paprika seed oil for the alleviation of hyperlipidemia. RESULTS: In capsaicin and paprika seed oil (PSO) groups, total cholesterol (TC) and total triglyceride (TG) in serum and liver lipids of rats were significantly decreased (P < 0...
March 2, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28249806/application-of-quantitative-targeted-absolute-proteomics-to-profile-protein-expression-changes-of-hepatic-transporters-and-metabolizing-enzymes-during-cholic-acid-promoted-liver-regeneration
#7
Takayuki Miura, Masanori Tachikawa, Hideo Ohtsuka, Koji Fukase, Shun Nakayama, Naoaki Sakata, Fuyuhiko Motoi, Takeshi Naitoh, Yu Katayose, Yasuo Uchida, Sumio Ohtsuki, Tetsuya Terasaki, Michiaki Unno
Preoperative administration of cholic acid (CA) may be an option to increase the liver volume before elective liver resection surgery, so it is important to understand its effects on liver functionality for drug transport and metabolism. The purpose of this study was to clarify the absolute protein expression dynamics of transporters and metabolizing enzymes in the liver of mice fed CA-containing diet for 5 days (CA1) and mice fed CA-containing diet for 5 days followed by diet without CA for 7 days (CA2), in comparison with non CA-fed control mice...
February 26, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28214689/paeoniflorin-ameliorates-cholestasis-via-regulating-hepatic-transporters-and-suppressing-inflammation-in-anit-fed-rats
#8
Yanling Zhao, Xuan He, Xiao Ma, Jianxia Wen, Pengyan Li, Jiabo Wang, Ruisheng Li, Yun Zhu, Shizhang Wei, Haotian Li, Xuelin Zhou, Kun Li, Honghong Liu, Xiaohe Xiao
Paeoniflorin has shown the obvious effect on cholestasis according to our previous research. However, its mechanism has not been absolutely explored yet. This study aims at evaluating the potential effect of paeoniflorin on alpha-naphthylisothiocyanate (ANIT) -induced cholestasis by inhibiting nuclear factor kappa-B (NF-κB) and simultaneously regulating hepatocyte transporters. Cholestasis was induced by administration of ANIT. The effect of paeoniflorin on serum indices such as total bilirubin (TBIL), direct bilirubin (DBIL), aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP), γ-glutamyltranspeptidase (γ-GT), total bile acid (TBA) and histopathology of liver were determined...
February 16, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28202906/bar502-a-dual-fxr-and-gpbar1-agonist-promotes-browning-of-white-adipose-tissue-and-reverses-liver-steatosis-and-fibrosis
#9
Adriana Carino, Sabrina Cipriani, Silvia Marchianò, Michele Biagioli, Chiara Santorelli, Annibale Donini, Angela Zampella, Maria Chiara Monti, Stefano Fiorucci
Non-alcoholic steatohepatitis (NASH) is a highly prevalent chronic liver disease. Here, we have investigated whether BAR502, a non-bile acid, steroidal dual ligand for FXR and GPBAR1, reverses steato-hepatitis in mice fed a high fat diet (HFD) and fructose. After 9 week, mice on HFD gained ≈30% of b.w (P < 0.01 versus naïve) and were insulin resistant. These overweighting and insulin resistant mice were randomized to receive HFD or HFD in combination with BAR502. After 18 weeks, HFD mice developed NASH like features with severe steato-hepatitis and fibrosis, increased hepatic content of triacylglycerol and cholesterol and expression of SREPB1c, FAS, ApoC2, PPARα and γ, α-SMA, α1 collagen and MCP1 mRNAs...
February 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28199789/cholesterol-lowering-activity-of-tartary-buckwheat-protein
#10
Chengnan Zhang, Rui Zhang, Yuk Man Li, Ning Liang, Yimin Zhao, Hanyue Zhu, Zouyan He, Jianhui Liu, Wangjun Hao, Rui Jiao, Ka Ying Ma, Zhen-Yu Chen
Previous research has shown that Tartary buckwheat flour is capable of reducing plasma cholesterol. The present study was to examine the effect of rutin and Tartary buckwheat protein on plasma total cholesterol (TC) in hypercholesterolemia hamsters. In the first animal experiment, 40 male hamsters were divided into four groups fed either the control diet or one of the three experimental diets containing 8.2 mmol rutin, 8.2 mmol quercetin, or 2.5 g kg(-1) cholestyramine, respectively. Results showed that only cholestyramine but not rutin and its aglycone quercetin decreased plasma TC, which suggested that rutin was not the active ingredient responsible for plasma TC-lowering activity of Tartary buckwheat flour...
February 24, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28169529/deacetylated-konjac-glucomannan-is-less-effective-in-reducing-dietary-induced-hyperlipidemia-and-hepatic-steatosis-in-c57bl-6-mice
#11
Mei-Ying Li, Guan-Ping Feng, Hong Wang, Rui-Li Yang, Zhenlin Xu, Yuan-Ming Sun
Konjac gel foods that mainly consist of deacetylated konjac glucomannan (Da-KGM) are considered to have the same health benefits as native konjac glucomannan (KGM); however, no definitive data support this notion. The objective of this study was to compare the effects of Da-KGM and KGM on the hyperlipidemia and liver steatosis induced by high-fat diet feeding and to investigate the underlying molecular mechanisms. C57BL/6 mice were fed (1) normal chow diet, (2) high-fat diet, (3) HFD with KGM, or (4) HFD with Da-KGM for 10 weeks...
February 17, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28161535/4-o-sulfation-in-sea-cucumber-fucodians-contribute-to-reversing-dyslipidiaemia-caused-by-hfd
#12
Shan Li, Junhui Li, Zijian Zhi, Yaqin Hu, Jian Ge, Xingqian Ye, Ding Tian, Robert J Linhardt, Shiguo Chen
Fucodians extracted from sea cucumbers (SC-FUCs) possess linear chains with uniform repeating units. Sulfation patterns endow SC-FUCs unique structures and bioactivity. The present study investigated the anti-hyperlipidemic activity of two fucodians isolated from sea cucumbers Pearsonothuria graeffei (fuc-Pg) and Isostichopus badionotus (fuc-Ib). The results indicate fuc-Pg dominated with a 4-O-sulfation pattern shows strong activity in reducing body weight, regulating lipid disorder (TC, TG, HLD-C, and LDL-C level), improving liver function (liver weight, GOP, GPT, and TBA concentrations) and increasing adiponectin level (adiponectin concentration) caused by HFD...
February 1, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28130274/commensal-bacteria-at-the-crossroad-between-cholesterol-homeostasis-and-chronic-inflammation-in-atherosclerosis
#13
Kazuyuki Kasahara, Takeshi Tanoue, Tomoya Yamashita, Keiko Yodoi, Takuya Matsumoto, Takuo Emoto, Taiji Mizoguchi, Tomohiro Hayashi, Naoki Kitano, Naoto Sasaki, Koji Atarashi, Kenya Honda, Ken-Ichi Hirata
The gut microbiota were shown to play critical roles in the development of atherosclerosis, but the detailed mechanism is limited. The purpose of this study is to clarify the influence of gut microbiota on atherogenesis via lipid metabolism and systemic inflammation. Germ-free or conventionally raised (Conv) ApoE-deficient (ApoE(-/-)) mice were fed chow diet and euthanized at 20 weeks of age. We found that the lack of gut microbiota in ApoE(-/-) mice caused a significant increase in the plasma and hepatic cholesterol levels compared with Conv ApoE(-/-) mice...
March 2017: Journal of Lipid Research
https://www.readbyqxmd.com/read/28127194/three-dimensional-perfused-human-in-vitro-model-of-non-alcoholic-fatty-liver-disease
#14
Tomasz Kostrzewski, Terri Cornforth, Sophie A Snow, Larissa Ouro-Gnao, Cliff Rowe, Emma M Large, David J Hughes
AIM: To develop a human in vitro model of non-alcoholic fatty liver disease (NAFLD), utilising primary hepatocytes cultured in a three-dimensional (3D) perfused platform. METHODS: Fat and lean culture media were developed to directly investigate the effects of fat loading on primary hepatocytes cultured in a 3D perfused culture system. Oil Red O staining was used to measure fat loading in the hepatocytes and the consumption of free fatty acids (FFA) from culture medium was monitored...
January 14, 2017: World Journal of Gastroenterology: WJG
https://www.readbyqxmd.com/read/28095641/melatonin-ameliorates-alcohol-induced-bile-acid-synthesis-by-enhancing-mir-497-expression
#15
Yong Deuk Kim, Seung-Lark Hwang, Eun-Joo Lee, Hyeong-Mi Kim, Myung-Jin Chung, Ahmed K Elfadl, Sung-Eun Lee, Balachandar Nedumaran, Robert A Harris, Kyu-Shik Jeong
Alcoholic liver disease is a major cause of chronic liver disease worldwide, and cannabinoid receptor type 1 (CB1R) is involved in a diverse metabolic diseases. B-cell translocation gene 2 (BTG2) and yin yang 1 (YY1) are a potent regulator of biological conditions. Melatonin plays a crucial role in regulating diverse physiological functions and metabolic homeostasis. MicroRNAs are key regulators of various biological processes. Herein, we demonstrate that melatonin improves bile acid synthesis in the liver of alcohol-fed mice by controlling miR-497 expression...
March 2017: Journal of Pineal Research
https://www.readbyqxmd.com/read/28091360/collagen-peptide-ingestion-alters-lipid-metabolism-related-gene-expression-and-the-unfolded-protein-response-in-mouse-liver
#16
Chisa Tometsuka, Yoh-Ichi Koyama, Tomoko Ishijima, Tsudoi Toyoda, Miki Teranishi, Kazushige Takehana, Keiko Abe, Yuji Nakai
Ingestion of collagen peptide (CP) elicits beneficial effects on the body, including improvement in blood lipid profiles, but the underlying mechanisms remain unclear. The purpose of this study was to investigate the effects of CP ingestion on the liver, which controls lipid metabolism in the body. Male BALB/cCrSlc mice were bred with the AIN-93M diet containing 14 % casein or the AIN-93M-based low-protein diet containing 10 % casein or a diet containing 6 % casein+4 % CP for 10 weeks (n 12/group). Total, free and esterified cholesterol levels in the blood decreased in the CP group...
January 16, 2017: British Journal of Nutrition
https://www.readbyqxmd.com/read/28067465/cholestyramine-alters%C3%A2-bile-acid%C3%A2-amounts-and-the-expression-of-cholesterol-related-genes-in-rabbit-intestinal-and-hepatic-tissues
#17
Dong Ni Qiu, Quan Shang, Da Yu Sun, Wei Qun Ding, Zhong Guang Luo, Jian Chen, Wei Ru Jiang, Jian Ping Huang, Xiao Yun Jiang
OBJECTIVE: Cholestyramine, as a bile acid sequestering exchange resin, has been wildly used to treat hypercholesterolemia. The aim of this study was to explore how cholestyramine regulated serum cholesterol amounts and bile acid levels in animal models. METHODS: The New Zealand White rabbits were randomly assigned to the control (given distilled water) and cholestyramine (CHO)-treated (given cholestyramine 1 g/kg/day for 2 weeks) groups. To assess bile acid pool size, bile fistulas were generated in five rabbits in each group...
January 9, 2017: Journal of Digestive Diseases
https://www.readbyqxmd.com/read/28056490/knockout-of-the-primary-sclerosing-cholangitis-risk-gene-fut2-causes-liver-disease-in-mice
#18
Luca Maroni, Simon D Hohenester, Stan F J van de Graaf, Dagmar Tolenaars, Krijn van Lienden, Joanne Verheij, Marco Marzioni, Tom H Karlsen, Ronald P J Oude Elferink, Ulrich Beuers
The etiopathogenesis of primary sclerosing cholangitis (PSC) is unknown. Genetic variants of fucosyltransferase 2 (FUT2) have been identified in genome-wide association studies as risk factor for PSC. We investigated the role of Fut2 in murine liver pathophysiology by studying Fut2(-/-) mice. Fut2(-/-) mice were viable and fertile, had lower body weight than wild type (wt) littermates and grey fur, as described earlier. Half of the Fut2(-/-) mice showed serum bile salt levels 40 times higher than wt (Fut2(-/-)(high) ), whereas the remainder were normocholanemic (Fut2(-/-)(low) )...
January 5, 2017: Hepatology: Official Journal of the American Association for the Study of Liver Diseases
https://www.readbyqxmd.com/read/28051334/glutamine-attenuates-obstructive-cholestasis-in-rats-via-farnesoid-x-receptor-mediated-regulation-of-bsep-and-mrp2
#19
Bingli Liu, Yiming Li, Hong Ji, Hongwei Lu, Hua Li, Yakun Shi
To investigate the protective effect of glutamine (Gln) against obstructive cholestasis in association with farnesoid X receptor (FXR) activation, an obstructive cholestasis model was established in male Sprague-Dawley rats by bile duct ligation (BDL). Serum biomarkers and hematoxylin plus eosin staining were used to identify the degree of hepatic injury in the rats with obstructive cholestasis after Gln treatment. Immunohistochemistry, real-time PCR, Western blot, cultured primary rat hepatocytes with FXR knockdown, and dual-luciferase reporter assay were performed to elucidate the mechanisms underlying Gln hepatoprotection...
October 5, 2016: Canadian Journal of Physiology and Pharmacology
https://www.readbyqxmd.com/read/28041926/chronic-over-expression-of-fibroblast-growth-factor-21-increases-bile-acid-biosynthesis-by-opposing-fgf15-19-action
#20
Jun Zhang, Jamila Gupte, Yan Gong, Jennifer Weiszmann, Yuan Zhang, Ki Jeong Lee, William G Richards, Yang Li
Pharmacological doses of fibroblast growth factor (FGF) 21 effectively normalize glucose, lipid and energy homeostasis in multiple animal models with many benefits translating to obese humans with type 2 diabetes. However, a role for FGF21 in the regulation of bile acid metabolism has not been reported. Herein, we demonstrate AAV-mediated FGF21 overexpression in mice increases liver expression of the key bile acid producing enzyme, Cyp7a1, resulting in an increased bile acid pool. Furthermore, in cholecystectomized mice, FGF21-mediated bile acid pool increase led to increased transit of bile acids into colon...
February 2017: EBioMedicine
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