34
views
0
recommends
+1 Recommend
0 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Clinical application of transcriptional activators of bile salt transporters

      review-article
      a , b , c , a , *
      Molecular Aspects of Medicine
      Elsevier Science
      ABC, ATP-binding cassette, AE2 (SLC4A2), anion exchanger 2, ALT, alanine aminotransferase, AMPK, AMP-activated protein kinase, ALP, alkaline phosphatase, ASBT (SLC10A2), apical sodium-dependent bile acid transporter, ASCOM, activating signal cointegrator-2-containing complex, BCRP (ABCG2), breast cancer resistance protein, BRIC2, benign recurrent intrahepatic cholestasis type 2, BS, bile salt, BSEP (ABCB11), bile salt export pump, CA, cholic acid, cAMP, cyclic adenosine monophosphate, CARM1, co-activator-associated arginine methyltransferase 1, CBDL, common bile duct ligation, CCl4, carbone tetrachloride, CDCA, chenodeoxycholic acid, CtBP, C-terminal binding protein, DCA, deoxycholic acid, DILI, drug-induced liver injury, GCA, glycocholic acid, GGT, gamma-glutamyl transpeptidase, GR (NR3C1), glucocorticoid receptor, GRE, glucocorticoid response element, HNF1α, hepatocyte nuclear factor 1 alpha, HNF4α, hepatocyte nuclear factor 4 alpha, ICP, intrahepatic cholestasis of pregnancy, IL-1β, interleukin-1 beta, IL-6, interleukin 6, IR-1, inverse repeat 1, FGF19/FGF15, fibroblast growth factor 19/15, FXR, farnesoid X receptor (NR1H4), FXRE, FXR response element, JNK, c-Jun N-terminal kinase, LCA, litocholic acid, LRH1 (NR5A2), liver receptor homologue 1, LPS, lipopolysaccharide, LXR (NR1H3), liver X receptor, MAF, musculo-aponeurotic fibrosacroma, MARE, MAF recognition element, MCL-1, myeloid cell leukemia factor 1, MDR1 (ABCB1), multidrug resistance protein 1, MDR2 (ABCB4), multidrug resistance protein 2, MRP2 (ABCC2), multidrug resistance-associated protein 2, MRP3 (ABCC3), multidrug resistance-associated protein 3, MRP4 (ABCC4), multidrug resistance-associated protein 4, NDRG2, NMYC downstrean-regulated gene 2, NF-κB, nuclear factor kappa-B, NRF2, nuclear factor erythroid 2-related factor 2, NTCP (SLC10A1), Na+-taurocholate cotransporting polypeptide solute carrier family 10 member 1 , OATP, organic anion transporting polypeptide, OCA, obeticholic acid, OSTα/OSTβ (SLC51A/SLC51B), organic solute transporter alpha/beta, PBC, primary biliary cirrhosis, PFIC2, progressive familial intrahepatic cholestasis type 2, PGC-1α, peroxisome proliferator-activated receptor gamma coactivator-1 alpha, PL, phospholipid, PPARα (NR1C1), peroxisome proliferator-activated receptor alpha, PPARγ (NR1C3), peroxisome proliferator-activated receptor gamma, PSC, primary sclerosing cholangitis, PXR (NR1I2), pregnane X receptor, RARα (NR1B1), retinoic acid receptor, RXRα (NR2B1), retinoid X receptor, SHP (NR0B2), short heterodimer partner, SRC2, steroid receptor co-activator 2, SREBP1, sterol regulatory element-binding protein 1, STAT-5, signal transducer and activator of transcription 5, TαMCA, α-tauromuricholic acid, TβMCA, β-tauromuricholic acid, TCA, taurocholic acid, TCDCA, taurochenodeoxycholic acid, TUDCA, tauroursodeoxycholic acid, TGR5, G protein coupled bile acid receptor, TNF-α, tumor necrosis factor alpha, TPN, total parenteral nutrition, UDCA, ursodeoxycholic acid, VDR (NR1I1), vitamin D receptor, VPAC-1, vasoactive intestinal polypeptide activated receptor, Nuclear receptors, ATB-binding cassette transporters, Cholestasis

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Hepatobiliary bile salt (BS) transporters are critical determinants of BS homeostasis controlling intracellular concentrations of BSs and their enterohepatic circulation. Genetic or acquired dysfunction of specific transport systems causes intrahepatic and systemic retention of potentially cytotoxic BSs, which, in high concentrations, may disturb integrity of cell membranes and subcellular organelles resulting in cell death, inflammation and fibrosis. Transcriptional regulation of canalicular BS efflux through bile salt export pump (BSEP), basolateral elimination through organic solute transporters alpha and beta (OSTα/OSTβ) as well as inhibition of hepatocellular BS uptake through basolateral Na +-taurocholate cotransporting polypeptide (NTCP) represent critical steps in protection from hepatocellular BS overload and can be targeted therapeutically. In this article, we review the potential clinical implications of the major BS transporters BSEP, OSTα/OSTβ and NTCP in the pathogenesis of hereditary and acquired cholestatic syndromes, provide an overview on transcriptional control of these transporters by the key regulatory nuclear receptors and discuss the potential therapeutic role of novel transcriptional activators of BS transporters in cholestasis.

          Related collections

          Most cited references297

          • Record: found
          • Abstract: found
          • Article: not found

          Identification of a nuclear receptor for bile acids.

          Bile acids are essential for the solubilization and transport of dietary lipids and are the major products of cholesterol catabolism. Results presented here show that bile acids are physiological ligands for the farnesoid X receptor (FXR), an orphan nuclear receptor. When bound to bile acids, FXR repressed transcription of the gene encoding cholesterol 7alpha-hydroxylase, which is the rate-limiting enzyme in bile acid synthesis, and activated the gene encoding intestinal bile acid-binding protein, which is a candidate bile acid transporter. These results demonstrate a mechanism by which bile acids transcriptionally regulate their biosynthesis and enterohepatic transport.
            Bookmark
            • Record: found
            • Abstract: found
            • Article: not found

            Endogenous bile acids are ligands for the nuclear receptor FXR/BAR.

            The major metabolic pathway for elimination of cholesterol is via conversion to bile acids. In addition to this metabolic function, bile acids also act as signaling molecules that negatively regulate their own biosynthesis. However, the precise nature of this signaling pathway has been elusive. We have isolated an endogenous biliary component (chenodeoxycholic acid) that selectively activates the orphan nuclear receptor, FXR. Structure-activity analysis defined a subset of related bile acid ligands that activate FXR and promote coactivator recruitment. Finally, we show that ligand-occupied FXR inhibits transactivation from the oxysterol receptor LXR alpha, a positive regulator of cholesterol degradation. We suggest that FXR (BAR) is the endogenous bile acid sensor and thus an important regulator of cholesterol homeostasis.
              Bookmark
              • Record: found
              • Abstract: found
              • Article: not found

              Hepatocyte nuclear factor 4alpha (nuclear receptor 2A1) is essential for maintenance of hepatic gene expression and lipid homeostasis.

              The numerous functions of the liver are controlled primarily at the transcriptional level by the concerted actions of a limited number of hepatocyte-enriched transcription factors (hepatocyte nuclear factor 1alpha [HNF1alpha], -1beta, -3alpha, -3beta, -3gamma, -4alpha, and -6 and members of the c/ebp family). Of these, only HNF4alpha (nuclear receptor 2A1) and HNF1alpha appear to be correlated with the differentiated phenotype of cultured hepatoma cells. HNF1alpha-null mice are viable, indicating that this factor is not an absolute requirement for the formation of an active hepatic parenchyma. In contrast, HNF4alpha-null mice die during embryogenesis. Moreover, recent in vitro experiments using tetraploid aggregation suggest that HNF4alpha is indispensable for hepatocyte differentiation. However, the function of HNF4alpha in the maintenance of hepatocyte differentiation and function is less well understood. To address the function of HNF4alpha in the mature hepatocyte, a conditional gene knockout was produced using the Cre-loxP system. Mice lacking hepatic HNF4alpha expression accumulated lipid in the liver and exhibited greatly reduced serum cholesterol and triglyceride levels and increased serum bile acid concentrations. The observed phenotypes may be explained by (i) a selective disruption of very-low-density lipoprotein secretion due to decreased expression of genes encoding apolipoprotein B and microsomal triglyceride transfer protein, (ii) an increase in hepatic cholesterol uptake due to increased expression of the major high-density lipoprotein receptor, scavenger receptor BI, and (iii) a decrease in bile acid uptake to the liver due to down-regulation of the major basolateral bile acid transporters sodium taurocholate cotransporter protein and organic anion transporter protein 1. These data indicate that HNF4alpha is central to the maintenance of hepatocyte differentiation and is a major in vivo regulator of genes involved in the control of lipid homeostasis.
                Bookmark

                Author and article information

                Contributors
                Journal
                Mol Aspects Med
                Mol. Aspects Med
                Molecular Aspects of Medicine
                Elsevier Science
                0098-2997
                1872-9452
                1 June 2014
                June 2014
                : 37
                : 100
                : 57-76
                Affiliations
                [a ]Hans Popper Laboratory of Molecular Hepatology, Division of Gastroenterology and Hepatology, Department of Internal Medicine III, Medical University of Vienna, Austria
                [b ]Laboratory of Experimental and Molecular Hepatology, Division of Gastroenterology and Hepatology, Department of Internal Medicine, Medical University of Graz, Austria
                [c ]Institute of Medical Chemistry, Medical University of Vienna, Austria
                Author notes
                [* ]Corresponding author. Address: Gastroenterology and Hepatology, Division of Gastroenterology and Hepatology, Department of Internal Medicine III, Medical University of Vienna, Waehringer Guertel 18-20, A-1090 Vienna, Austria. Tel.: +43 1 40 4004741; fax: +43 1 40 4004735. michael.trauner@ 123456meduniwien.ac.at
                Article
                S0098-2997(13)00082-4
                10.1016/j.mam.2013.12.001
                4045202
                24333169
                8abfdf9b-9559-4e55-b1d2-06ffea691438
                © 2013 The Authors

                This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/3.0/).

                History
                : 18 September 2013
                : 21 November 2013
                : 1 December 2013
                Categories
                Review

                abc, atp-binding cassette,ae2 (slc4a2), anion exchanger 2,alt, alanine aminotransferase,ampk, amp-activated protein kinase,alp, alkaline phosphatase,asbt (slc10a2), apical sodium-dependent bile acid transporter,ascom, activating signal cointegrator-2-containing complex,bcrp (abcg2), breast cancer resistance protein,bric2, benign recurrent intrahepatic cholestasis type 2,bs, bile salt,bsep (abcb11), bile salt export pump,ca, cholic acid,camp, cyclic adenosine monophosphate,carm1, co-activator-associated arginine methyltransferase 1,cbdl, common bile duct ligation,ccl4, carbone tetrachloride,cdca, chenodeoxycholic acid,ctbp, c-terminal binding protein,dca, deoxycholic acid,dili, drug-induced liver injury,gca, glycocholic acid,ggt, gamma-glutamyl transpeptidase,gr (nr3c1), glucocorticoid receptor,gre, glucocorticoid response element,hnf1α, hepatocyte nuclear factor 1 alpha,hnf4α, hepatocyte nuclear factor 4 alpha,icp, intrahepatic cholestasis of pregnancy,il-1β, interleukin-1 beta,il-6, interleukin 6,ir-1, inverse repeat 1,fgf19/fgf15, fibroblast growth factor 19/15,fxr, farnesoid x receptor (nr1h4),fxre, fxr response element,jnk, c-jun n-terminal kinase,lca, litocholic acid,lrh1 (nr5a2), liver receptor homologue 1,lps, lipopolysaccharide,lxr (nr1h3), liver x receptor,maf, musculo-aponeurotic fibrosacroma,mare, maf recognition element,mcl-1, myeloid cell leukemia factor 1,mdr1 (abcb1), multidrug resistance protein 1,mdr2 (abcb4), multidrug resistance protein 2,mrp2 (abcc2), multidrug resistance-associated protein 2,mrp3 (abcc3), multidrug resistance-associated protein 3,mrp4 (abcc4), multidrug resistance-associated protein 4,ndrg2, nmyc downstrean-regulated gene 2,nf-κb, nuclear factor kappa-b,nrf2, nuclear factor erythroid 2-related factor 2,ntcp (slc10a1), na+-taurocholate cotransporting polypeptide solute carrier family 10 member 1,oatp, organic anion transporting polypeptide,oca, obeticholic acid,ostα/ostβ (slc51a/slc51b), organic solute transporter alpha/beta,pbc, primary biliary cirrhosis,pfic2, progressive familial intrahepatic cholestasis type 2,pgc-1α, peroxisome proliferator-activated receptor gamma coactivator-1 alpha,pl, phospholipid,pparα (nr1c1), peroxisome proliferator-activated receptor alpha,pparγ (nr1c3), peroxisome proliferator-activated receptor gamma,psc, primary sclerosing cholangitis,pxr (nr1i2), pregnane x receptor,rarα (nr1b1), retinoic acid receptor,rxrα (nr2b1), retinoid x receptor,shp (nr0b2), short heterodimer partner,src2, steroid receptor co-activator 2,srebp1, sterol regulatory element-binding protein 1,stat-5, signal transducer and activator of transcription 5,tαmca, α-tauromuricholic acid,tβmca, β-tauromuricholic acid,tca, taurocholic acid,tcdca, taurochenodeoxycholic acid,tudca, tauroursodeoxycholic acid,tgr5, g protein coupled bile acid receptor,tnf-α, tumor necrosis factor alpha,tpn, total parenteral nutrition,udca, ursodeoxycholic acid,vdr (nr1i1), vitamin d receptor,vpac-1, vasoactive intestinal polypeptide activated receptor,nuclear receptors,atb-binding cassette transporters,cholestasis
                abc, atp-binding cassette, ae2 (slc4a2), anion exchanger 2, alt, alanine aminotransferase, ampk, amp-activated protein kinase, alp, alkaline phosphatase, asbt (slc10a2), apical sodium-dependent bile acid transporter, ascom, activating signal cointegrator-2-containing complex, bcrp (abcg2), breast cancer resistance protein, bric2, benign recurrent intrahepatic cholestasis type 2, bs, bile salt, bsep (abcb11), bile salt export pump, ca, cholic acid, camp, cyclic adenosine monophosphate, carm1, co-activator-associated arginine methyltransferase 1, cbdl, common bile duct ligation, ccl4, carbone tetrachloride, cdca, chenodeoxycholic acid, ctbp, c-terminal binding protein, dca, deoxycholic acid, dili, drug-induced liver injury, gca, glycocholic acid, ggt, gamma-glutamyl transpeptidase, gr (nr3c1), glucocorticoid receptor, gre, glucocorticoid response element, hnf1α, hepatocyte nuclear factor 1 alpha, hnf4α, hepatocyte nuclear factor 4 alpha, icp, intrahepatic cholestasis of pregnancy, il-1β, interleukin-1 beta, il-6, interleukin 6, ir-1, inverse repeat 1, fgf19/fgf15, fibroblast growth factor 19/15, fxr, farnesoid x receptor (nr1h4), fxre, fxr response element, jnk, c-jun n-terminal kinase, lca, litocholic acid, lrh1 (nr5a2), liver receptor homologue 1, lps, lipopolysaccharide, lxr (nr1h3), liver x receptor, maf, musculo-aponeurotic fibrosacroma, mare, maf recognition element, mcl-1, myeloid cell leukemia factor 1, mdr1 (abcb1), multidrug resistance protein 1, mdr2 (abcb4), multidrug resistance protein 2, mrp2 (abcc2), multidrug resistance-associated protein 2, mrp3 (abcc3), multidrug resistance-associated protein 3, mrp4 (abcc4), multidrug resistance-associated protein 4, ndrg2, nmyc downstrean-regulated gene 2, nf-κb, nuclear factor kappa-b, nrf2, nuclear factor erythroid 2-related factor 2, ntcp (slc10a1), na+-taurocholate cotransporting polypeptide solute carrier family 10 member 1, oatp, organic anion transporting polypeptide, oca, obeticholic acid, ostα/ostβ (slc51a/slc51b), organic solute transporter alpha/beta, pbc, primary biliary cirrhosis, pfic2, progressive familial intrahepatic cholestasis type 2, pgc-1α, peroxisome proliferator-activated receptor gamma coactivator-1 alpha, pl, phospholipid, pparα (nr1c1), peroxisome proliferator-activated receptor alpha, pparγ (nr1c3), peroxisome proliferator-activated receptor gamma, psc, primary sclerosing cholangitis, pxr (nr1i2), pregnane x receptor, rarα (nr1b1), retinoic acid receptor, rxrα (nr2b1), retinoid x receptor, shp (nr0b2), short heterodimer partner, src2, steroid receptor co-activator 2, srebp1, sterol regulatory element-binding protein 1, stat-5, signal transducer and activator of transcription 5, tαmca, α-tauromuricholic acid, tβmca, β-tauromuricholic acid, tca, taurocholic acid, tcdca, taurochenodeoxycholic acid, tudca, tauroursodeoxycholic acid, tgr5, g protein coupled bile acid receptor, tnf-α, tumor necrosis factor alpha, tpn, total parenteral nutrition, udca, ursodeoxycholic acid, vdr (nr1i1), vitamin d receptor, vpac-1, vasoactive intestinal polypeptide activated receptor, nuclear receptors, atb-binding cassette transporters, cholestasis

                Comments

                Comment on this article