Urinary metabolomics in Fxr-null mice reveals activated adaptive metabolic pathways upon bile acid challenge
摘要:
Farnesoid X receptor (FXR) is a nuclear receptor that regulates genes involved in synthesis, metabolism, and transport of bile acids and thus plays a major role in maintaining bile acid homeostasis. In this study, metabolomic responses were investigated in urine of wild-type and Fxr-null mice fed cholic acid, an FXR ligand, using ultra-performance liquid chromatography (UPLC) coupled with electrospray time-of-flight mass spectrometry (TOFMS). Multivariate data analysis between wild-type and Fxr-null mice on a cholic acid diet revealed that the most increased ions were metabolites of p-cresol (4-methylphenol), corticosterone, and cholic acid in Fxr-null mice. The structural identities of the above metabolites were confirmed by chemical synthesis and by comparing retention time (RT) and/or tandem mass fragmentation patterns of the urinary metabolites with the authentic standards. Tauro-3 alpha,6,7 alpha,12 alpha-tetrol (3 alpha,6,7 alpha,12 alpha-tetrahydroxy-5 beta-cholestan-26-oyltaurine), one of the most increased metabolites in Fxr-null mice on a CA diet, is a marker for efficient hydroxylation of toxic bile acids possibly through induction of Cyp3a11. A cholestatic model induced by lithocholic acid revealed that enhanced expression of Cyp3a11 is the major defense mechanism to detoxify cholestatic bile acids in Fxr-null mice. These results will be useful for identification of biomarkers for cholestasis and for determination of adaptive molecular mechanisms in cholestasis.-Cho, J. Y., T. Matsubara, D. W. Kang, S. H. Ahn, K. W. Krausz, J. R. Idle, H. Luecke, and F. J. Gonzalez. Urinary metabolomics in Fxr-null mice reveals activated adaptive metabolic pathways upon bile acid challenge. J. Lipid Res. 2010. 51: 1063-1074.
Synthesis of 6-hydroxylated bile acids and identification of 3.ALPHA.,6.ALPHA.,7.ALPHA.,12.ALPHA.-tetrahydroxy-5.BETA.-cholan-24-oic acid in human meconium and neonatal urine.
Potential bile acid metabolites. 16. Synthesis of stereoisomeric 3α,6,7,12α-tetrahydroxy-5β-cholanoic acids
作者:Iida Takashi、Komatsubara Ichiro、Yoda Sciichiro、Goto Junichi、Nambara Toshio、Frederic C. Chang
DOI:10.1016/0039-128x(90)90048-g
日期:1990.12
possible stereoisomeric 3 alpha,6,7,12 alpha-tetrahydroxy-5 beta-cholanoic acids (and their methyl esters), one of which (3 alpha,6 alpha 7 beta,12 alpha) is new, and some related compounds are described. In addition, the 5 alpha-epimer of the new acid was obtained. The final products were obtained in high purity for use as reference compounds in the analysis of bile acids in human biologic samples
Polyhydroxylated bile acids for treatment of biliary disorders
申请人:Qing Bile Therapeutics Inc.
公开号:US10543220B2
公开(公告)日:2020-01-28
The invention provides, in part, polyhydroxylated bile acids for treating biliary disorders, for example, biliary disorders arising out of cholestasis of portal hypertension. The invention also provides, in part, polyhydroxylated bile acids for stimulating bile flow. New compounds 2α, 3α, 7α, 12α-tetrahydroxy-5β-cholanoic acid and 3α. 4α, 7α, 12α-tetrahydroxy-5β-cholanoic acid are disclosed, uses thereof and synthesis thereof.
Unusual bile acids, 3-alpha, 6-alpha, 7-alpha, 12-alpha-,3-alpha, 6-beta, 7-alpha, 12-alpha-, and 3-alpha, 6-beta, 7-beta, 12-alpha-tetrahydroxy-5-beta-cholan-24-oic acids, were identified in all amniotic fluid (four samples) and urine (six samples) from adult patients with cholestatic liver disease by gas-liquid chromatography/mass spectrometry. For the certain identification of these bile acids in the biologic samples, the chemical syntheses of 3-alpha, 6-beta, 7-alpha, 12-alpha- and 3-alpha, 6-beta, 7-beta, 12-alpha-tetrahydroxy-5-beta-cholan-24-oic acids were conducted.
KUROSAWA, TAKAO;MAHARA, REIJIRO;NITTONO, HIROSHI;TOHMA, MASAHIKO, CHEM. AND PHARM. BULL., 37,(1989) N, C. 557-559
Polyhydroxylated Bile Acids for Treatment of Biliary Disorders
申请人:Wang Renxue
公开号:US20110263546A1
公开(公告)日:2011-10-27
The invention provides, in part, polyhydroxylated bile acids for treating biliary disorders, for example, biliary disorders arising out of cholestasis or portal hypertension. The invention also provides, in part, polyhydroxylated bile acids for stimulating bile flow.