Semin Liver Dis 2016; 36(01): 005-014
DOI: 10.1055/s-0035-1571274
Thieme Medical Publishers 333 Seventh Avenue, New York, NY 10001, USA.

New Therapeutic Strategies for Primary Sclerosing Cholangitis

Kate D. Williamson
1   Translational Gastroenterology Unit, John Radcliffe Hospital, Oxford, United Kingdom
2   Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
,
Roger W. Chapman
1   Translational Gastroenterology Unit, John Radcliffe Hospital, Oxford, United Kingdom
2   Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
› Author Affiliations
Further Information

Publication History

Publication Date:
12 February 2016 (online)

Abstract

Primary sclerosing cholangitis (PSC) is a chronic cholestatic liver disease, which in the majority of patients progresses to liver transplantation or death. To date, no medical treatment has been proven to be of benefit, although ursodeoxycholic acid is widely used. The etiopathogenesis of PSC is unclear, although it is associated with inflammatory bowel disease. Various hypotheses have been suggested, which have led to different therapeutic strategies. Recent studies have suggested that the microbiome may play a role in PSC, raising the possibility of efficacy of antibiotics and fecal microbiota transplantation. Gut-homing T cells may be important in the pathogenesis of PSC, and several agents are in development, targeting various receptors, integrins, and ligands on this pathway, including VAP-1, MAdCAM-1, α4β7, and CCR9. Nuclear receptor agonists such as obeticholic acid and fibrates hold promise, as do other therapies that alter bile acid composition such as norUDCA. Antifibrotic agents such as Loxl2 inhibitors are also being assessed. In conclusion, it is likely that an effective drug therapy for PSC will become available over the next decade.

 
  • References

  • 1 Molodecky NA, Kareemi H, Parab R , et al. Incidence of primary sclerosing cholangitis: a systematic review and meta-analysis. Hepatology 2011; 53 (5) 1590-1599
  • 2 Boonstra K, Weersma RK, van Erpecum KJ , et al; EpiPSCPBC Study Group. Population-based epidemiology, malignancy risk, and outcome of primary sclerosing cholangitis. Hepatology 2013; 58 (6) 2045-2055
  • 3 Broomé U, Olsson R, Lööf L , et al. Natural history and prognostic factors in 305 Swedish patients with primary sclerosing cholangitis. Gut 1996; 38 (4) 610-615
  • 4 European Association for the Study of the Liver. EASL Clinical Practice Guidelines: management of cholestatic liver diseases. J Hepatol 2009; 51 (2) 237-267
  • 5 Chapman R, Fevery J, Kalloo A , et al; American Association for the Study of Liver Diseases. Diagnosis and management of primary sclerosing cholangitis. Hepatology 2010; 51 (2) 660-678
  • 6 National Health and Blood Service. Annual Report on Liver Transplantation–Report for 2013/2014. Available at: http://www.odt.nhs.uk/pdf/organ_specific_report_liver_2014.pdf . Accessed March 8, 2015
  • 7 Stanich PP, Björnsson E, Gossard AA, Enders F, Jorgensen R, Lindor KD. Alkaline phosphatase normalization is associated with better prognosis in primary sclerosing cholangitis. Dig Liver Dis 2011; 43 (4) 309-313
  • 8 Lindström L, Hultcrantz R, Boberg KM, Friis-Liby I, Bergquist A. Association between reduced levels of alkaline phosphatase and survival times of patients with primary sclerosing cholangitis. Clin Gastroenterol Hepatol 2013; 11 (7) 841-846
  • 9 Al Mamari S, Djordjevic J, Halliday JS, Chapman RW. Improvement of serum alkaline phosphatase to <1.5 upper limit of normal predicts better outcome and reduced risk of cholangiocarcinoma in primary sclerosing cholangitis. J Hepatol 2013; 58 (2) 329-334
  • 10 Rupp C, Rössler A, Halibasic E , et al. Reduction in alkaline phosphatase is associated with longer survival in primary sclerosing cholangitis, independent of dominant stenosis. Aliment Pharmacol Ther 2014; 40 (11–12) 1292-1301
  • 11 Poupon R. Liver alkaline phosphatase: a missing link between choleresis and biliary inflammation. Hepatology 2015; 61 (6) 2080-2090
  • 12 Williamson KD, Chapman RW. Editorial: further evidence for the role of serum alkaline phosphatase as a useful surrogate marker of prognosis in PSC. Aliment Pharmacol Ther 2015; 41 (1) 149-151
  • 13 Tung BY, Emond MJ, Haggitt RC , et al. Ursodiol use is associated with lower prevalence of colonic neoplasia in patients with ulcerative colitis and primary sclerosing cholangitis. Ann Intern Med 2001; 134 (2) 89-95
  • 14 Pardi DS, Loftus Jr EV, Kremers WK, Keach J, Lindor KD. Ursodeoxycholic acid as a chemopreventive agent in patients with ulcerative colitis and primary sclerosing cholangitis. Gastroenterology 2003; 124 (4) 889-893
  • 15 Wolf JM, Rybicki LA, Lashner BA. The impact of ursodeoxycholic acid on cancer, dysplasia and mortality in ulcerative colitis patients with primary sclerosing cholangitis. Aliment Pharmacol Ther 2005; 22 (9) 783-788
  • 16 Eaton JE, Silveira MG, Pardi DS , et al. High-dose ursodeoxycholic acid is associated with the development of colorectal neoplasia in patients with ulcerative colitis and primary sclerosing cholangitis. Am J Gastroenterol 2011; 106 (9) 1638-1645
  • 17 Lindström L, Boberg KM, Wikman O , et al. High dose ursodeoxycholic acid in primary sclerosing cholangitis does not prevent colorectal neoplasia. Aliment Pharmacol Ther 2012; 35 (4) 451-457
  • 18 Singh S, Khanna S, Pardi DS, Loftus Jr EV, Talwalkar JA. Effect of ursodeoxycholic acid use on the risk of colorectal neoplasia in patients with primary sclerosing cholangitis and inflammatory bowel disease: a systematic review and meta-analysis. Inflamm Bowel Dis 2013; 19 (8) 1631-1638
  • 19 Karlsen TH, Franke A, Melum E , et al. Genome-wide association analysis in primary sclerosing cholangitis. Gastroenterology 2010; 138 (3) 1102-1111
  • 20 Ellinghaus D, Folseraas T, Holm K , et al. Genome-wide association analysis in primary sclerosing cholangitis and ulcerative colitis identifies risk loci at GPR35 and TCF4. Hepatology 2013; 58 (3) 1074-1083
  • 21 Liu JZ, Hov JR, Folseraas T , et al; UK-PSCSC Consortium; International IBD Genetics Consortium; International PSC Study Group. Dense genotyping of immune-related disease regions identifies nine new risk loci for primary sclerosing cholangitis. Nat Genet 2013; 45 (6) 670-675
  • 22 Hirschfield GM, Karlsen TH, Lindor KD, Adams DH. Primary sclerosing cholangitis. Lancet 2013; 382 (9904) 1587-1599
  • 23 Eksteen B, Grant AJ, Miles A , et al. Hepatic endothelial CCL25 mediates the recruitment of CCR9+ gut-homing lymphocytes to the liver in primary sclerosing cholangitis. J Exp Med 2004; 200 (11) 1511-1517
  • 24 Eksteen B. Advances and controversies in the pathogenesis and management of primary sclerosing cholangitis. Br Med Bull 2014; 110 (1) 89-98
  • 25 Lindkvist B, Benito de Valle M, Gullberg B, Björnsson E. Incidence and prevalence of primary sclerosing cholangitis in a defined adult population in Sweden. Hepatology 2010; 52 (2) 571-577
  • 26 Boonstra K, Beuers U, Ponsioen CY. Epidemiology of primary sclerosing cholangitis and primary biliary cirrhosis: a systematic review. J Hepatol 2012; 56 (5) 1181-1188
  • 27 Kim WR, Poterucha JJ, Wiesner RH , et al. The relative role of the Child-Pugh classification and the Mayo natural history model in the assessment of survival in patients with primary sclerosing cholangitis. Hepatology 1999; 29 (6) 1643-1648
  • 28 Banerjee R, Pavlides M, Tunnicliffe EM , et al. Multiparametric magnetic resonance for the non-invasive diagnosis of liver disease. J Hepatol 2014; 60 (1) 69-77
  • 29 de Vries EMG, Beuers U, Ponsioen CY. Biomarkers for disease progression of primary sclerosing cholangitis. Curr Opin Gastroenterol 2015; 31 (3) 239-246
  • 30 Vesterhus M, Hov JR, Holm A , et al. Enhanced liver fibrosis score predicts transplant-free survival in primary sclerosing cholangitis. Hepatology 2015; 62 (1) 188-197
  • 31 Okazaki K, Uchida K, Koyabu M, Miyoshi H, Ikeura T, Takaoka M. IgG4 cholangiopathy: current concept, diagnosis, and pathogenesis. J Hepatol 2014; 61 (3) 690-695
  • 32 Ngu JH, Gearry RB, Wright AJ, Stedman CA. Inflammatory bowel disease is associated with poor outcomes of patients with primary sclerosing cholangitis. Clin Gastroenterol Hepatol 2011; 9 (12) 1092-1097 , quiz e135
  • 33 Björnsson E, Boberg KM, Cullen S , et al. Patients with small duct primary sclerosing cholangitis have a favourable long term prognosis. Gut 2002; 51 (5) 731-735
  • 34 O'Brien CB, Senior JR, Arora-Mirchandani R, Batta AK, Salen G. Ursodeoxycholic acid for the treatment of primary sclerosing cholangitis: a 30-month pilot study. Hepatology 1991; 14 (5) 838-847
  • 35 Beuers U, Spengler U, Kruis W , et al. Ursodeoxycholic acid for treatment of primary sclerosing cholangitis: a placebo-controlled trial. Hepatology 1992; 16 (3) 707-714
  • 36 Stiehl A, Walker S, Stiehl L, Rudolph G, Hofmann WJ, Theilmann L. Effect of ursodeoxycholic acid on liver and bile duct disease in primary sclerosing cholangitis. A 3-year pilot study with a placebo-controlled study period. J Hepatol 1994; 20 (1) 57-64
  • 37 De Maria N, Colantoni A, Rosenbloom E, Van Thiel DH. Ursodeoxycholic acid does not improve the clinical course of primary sclerosing cholangitis over a 2-year period. Hepatogastroenterology 1996; 43 (12) 1472-1479
  • 38 Lindor KD ; Mayo Primary Sclerosing Cholangitis-Ursodeoxycholic Acid Study Group. Ursodiol for primary sclerosing cholangitis. N Engl J Med 1997; 336 (10) 691-695
  • 39 van Hoogstraten HJF, Wolfhagen FHJ, van de Meeberg PC , et al. Ursodeoxycholic acid therapy for primary sclerosing cholangitis: results of a 2-year randomized controlled trial to evaluate single versus multiple daily doses. J Hepatol 1998; 29 (3) 417-423
  • 40 Mitchell SA, Bansi DS, Hunt N, Von Bergmann K, Fleming KA, Chapman RW. A preliminary trial of high-dose ursodeoxycholic acid in primary sclerosing cholangitis. Gastroenterology 2001; 121 (4) 900-907
  • 41 Harnois DM, Angulo P, Jorgensen RA, Larusso NF, Lindor KD. High-dose ursodeoxycholic acid as a therapy for patients with primary sclerosing cholangitis. Am J Gastroenterol 2001; 96 (5) 1558-1562
  • 42 Olsson R, Boberg KM, de Muckadell OS , et al. High-dose ursodeoxycholic acid in primary sclerosing cholangitis: a 5-year multicenter, randomized, controlled study. Gastroenterology 2005; 129 (5) 1464-1472
  • 43 Lindor KD, Kowdley KV, Luketic VA , et al. High-dose ursodeoxycholic acid for the treatment of primary sclerosing cholangitis. Hepatology 2009; 50 (3) 808-814
  • 44 Lo SK, Hermann R, Chapman RWC , et al. Ursodeoxycholic acid in primary sclerosing cholangitis: a double-blind placebo controlled trial. Hepatology 1992; 16 (S4): 92A
  • 45 Wunsch E, Trottier J, Milkiewicz M , et al. Prospective evaluation of ursodeoxycholic acid withdrawal in patients with primary sclerosing cholangitis. Hepatology 2014; 60 (3) 931-940
  • 46 Tabibian JH, Lindor KD. Ursodeoxycholic acid in primary sclerosing cholangitis: if withdrawal is bad, then administration is good (right?). Hepatology 2014; 60 (3) 785-788
  • 47 University of Tennessee. Safety and efficacy study of ursodeoxycholic acid therapy in pediatric primary sclerosing cholangitis. ClinicalTrials.gov. Bethesda, MD: National Institutes of Health. Available at: https://clinicaltrials.gov/ct2/show/NCT01088607 . Accessed July 30, 2015
  • 48 Schramm C, Schirmacher P, Helmreich-Becker I, Gerken G, zum Büschenfelde KH, Lohse AW. Combined therapy with azathioprine, prednisolone, and ursodiol in patients with primary sclerosing cholangitis. A case series. Ann Intern Med 1999; 131 (12) 943-946
  • 49 Sandborn WJ, Wiesner RH, Tremaine WJ, Larusso NF. Ulcerative colitis disease activity following treatment of associated primary sclerosing cholangitis with cyclosporin. Gut 1993; 34 (2) 242-246
  • 50 Knox TA, Kaplan MM. Treatment of primary sclerosing cholangitis with oral methotrexate. Am J Gastroenterol 1991; 86 (5) 546-552
  • 51 Knox TA, Kaplan MM. A double-blind controlled trial of oral-pulse methotrexate therapy in the treatment of primary sclerosing cholangitis. Gastroenterology 1994; 106 (2) 494-499
  • 52 Talwalkar JA, Gossard AA, Keach JC, Jorgensen RA, Petz JL, Lindor RN. Tacrolimus for the treatment of primary sclerosing cholangitis. Liver Int 2007; 27 (4) 451-453
  • 53 LaRusso NF, Wiesner RH, Ludwig J, MacCarty RL, Beaver SJ, Zinsmeister AR. Prospective trial of penicillamine in primary sclerosing cholangitis. Gastroenterology 1988; 95 (4) 1036-1042
  • 54 Olsson R, Broomé U, Danielsson A , et al. Colchicine treatment of primary sclerosing cholangitis. Gastroenterology 1995; 108 (4) 1199-1203
  • 55 Hommes DW, Erkelens W, Ponsioen C , et al. A double-blind, placebo-controlled, randomized study of infliximab in primary sclerosing cholangitis. J Clin Gastroenterol 2008; 42 (5) 522-526
  • 56 Fickert P, Pollheimer MJ, Beuers U , et al; International PSC Study Group (IPSCSG). Characterization of animal models for primary sclerosing cholangitis (PSC). J Hepatol 2014; 60 (6) 1290-1303
  • 57 Nakken KE, Nygård S, Haaland T , et al. Multiple inflammatory-, tissue remodelling- and fibrosis genes are differentially transcribed in the livers of Abcb4 (-/ - ) mice harbouring chronic cholangitis. Scand J Gastroenterol 2007; 42 (10) 1245-1255
  • 58 Barry-Hamilton V, Spangler R, Marshall D , et al. Allosteric inhibition of lysyl oxidase-like-2 impedes the development of a pathologic microenvironment. Nat Med 2010; 16 (9) 1009-1017
  • 59 Gilead Sciences. Simtuzumab (GS-6624) in the prevention of progression of liver fibrosis in subjects with primary sclerosing cholangitis (PSC). ClinicalTrials.gov. Bethesda, MD: National Institutes of Health. Available at: https://www.clinicaltrials.gov/ct2/show/NCT01672853 . Accessed July 27, 2015
  • 60 Gilead Sciences Inc. Gilead announces data from phase 2 study of simtuzumab for previously untreated pancreatic cancer, 2015. Available at: http://www.gilead.com/news/press-releases/2014/9/gilead-announces-data-from-phase-2-study-of-simtuzumab-for-previously-untreated-pancreatic-cancer . Accessed July 27, 2015
  • 61 Pellicciari R, Fiorucci S, Camaioni E , et al. 6α-ethyl-chenodeoxycholic acid (6-ECDCA), a potent and selective FXR agonist endowed with anticholestatic activity. J Med Chem 2002; 45 (17) 3569-3572
  • 62 Fiorucci S, Rizzo G, Antonelli E , et al. A farnesoid x receptor-small heterodimer partner regulatory cascade modulates tissue metalloproteinase inhibitor-1 and matrix metalloprotease expression in hepatic stellate cells and promotes resolution of liver fibrosis. J Pharmacol Exp Ther 2005; 314 (2) 584-595
  • 63 Neuschwander-Tetri BA, Loomba R, Sanyal AJ , et al; NASH Clinical Research Network. Farnesoid X nuclear receptor ligand obeticholic acid for non-cirrhotic, non-alcoholic steatohepatitis (FLINT): a multicentre, randomised, placebo-controlled trial. Lancet 2015; 385 (9972) 956-965
  • 64 Fickert P, Fuchsbichler A, Moustafa T , et al. Farnesoid X receptor critically determines the fibrotic response in mice but is expressed to a low extent in human hepatic stellate cells and periductal myofibroblasts. Am J Pathol 2009; 175 (6) 2392-2405
  • 65 Hirschfield GM, Mason A, Luketic V , et al. Efficacy of obeticholic acid in patients with primary biliary cirrhosis and inadequate response to ursodeoxycholic acid. Gastroenterology 2015; 148 (4) 751-61.e8
  • 66 Pharmaceuticals I. Obeticholic acid (OCA) in primary sclerosing cholangitis (PSC) (AESOP). ClinicalTrials.gov. Bethesda, MD: National Institutes of Health. Available at: https://clinicaltrials.gov/ct2/show/NCT02177136 . Accessed July 27, 2015
  • 67 He H, Mennone A, Boyer JL, Cai SY. Combination of retinoic acid and ursodeoxycholic acid attenuates liver injury in bile duct-ligated rats and human hepatic cells. Hepatology 2011; 53 (2) 548-557
  • 68 Yale University combination therapy with ursodeoxycholic acid (UDCA) and all-trans retinoic acid (ATRA) for treatment of primary sclerosing cholangitis. ClinicalTrials.gov. Bethesda, MD: National Institutes of Health. Available at: https://clinicaltrials.gov/ct2/show/NCT01456468 . Accessed July 31, 2015
  • 69 Fickert P, Wagner M, Marschall HU , et al. 24-norUrsodeoxycholic acid is superior to ursodeoxycholic acid in the treatment of sclerosing cholangitis in Mdr2 (Abcb4) knockout mice. Gastroenterology 2006; 130 (2) 465-481
  • 70 Halilbasic E, Fiorotto R, Fickert P , et al. Side chain structure determines unique physiologic and therapeutic properties of norursodeoxycholic acid in Mdr2-/- mice. Hepatology 2009; 49 (6) 1972-1981
  • 71 Dr. Falk Pharma GmbH. Norursodeoxycholic acid in the treatment of primary sclerosing cholangitis (NUC-3). ClinicalTrials.gov. Bethesda, MD: National Institutes of Health. Available at: https://clinicaltrials.gov/ct2/show/NCT01755507 . Accessed July 27, 2015
  • 72 Miethke AG, Zhang W, Simmons J , et al. Pharmacological inhibition of ASBT changes bile composition and blocks progression of sclerosing cholangitis in mdr2 knockout mice. Hepatology 2015; ; August 21, 2015. DOI:10.1002/hep.27973 [e-pub ahead of print]
  • 73 Shire. Open label study to evaluate safety and efficacy of LUM001 in patients with primary sclerosing cholangitis (CAMEO). ClinicalTrials.gov. Bethesda, MD: National Institutes of Health. Available at: https://clinicaltrials.gov/ct2/show/NCT02061540 . Accessed July 31, 2015
  • 74 Konieczna A, Lichnovka R, Erdosova B, Ehrmann J. The role of PPARs in MDR - a lesson from embryonic development. Neoplasma 2009; 56 (4) 279-283
  • 75 Oude Elferink RP, Ottenhoff R, van Wijland M, Smit JJ, Schinkel AH, Groen AK. Regulation of biliary lipid secretion by mdr2 P-glycoprotein in the mouse. J Clin Invest 1995; 95 (1) 31-38
  • 76 Halliday JS, Chapman RW. No more pilots, a phase III trial of fibrates in primary biliary cirrhosis is long overdue!. J Gastroenterol Hepatol 2011; 26 (9) 1345-1346
  • 77 Kita R, Kita-Sasai Y, Hanaoka I , et al. Beneficial effect of bezafibrate on primary sclerosing cholangitis (three case reports). Am J Gastroenterol 2002; 97 (7) 1849-1851
  • 78 Kurihara T, Maeda A, Shigemoto M, Yamashita K, Kamatani N. Efficacy of bezafibrate in a patient with primary sclerosing cholangitis. J Gastroenterol 2003; 38 (3) 300-301
  • 79 Kita R, Takamatsu S, Kimura T, Kokuryu H, Osaki Y, Tomono N. Bezafibrate may attenuate biliary damage associated with chronic liver diseases accompanied by high serum biliary enzyme levels. J Gastroenterol 2006; 41 (7) 686-692
  • 80 Mizuno S, Hirano K, Tada M , et al. Bezafibrate for the treatment of primary sclerosing cholangitis. J Gastroenterol 2010; 45 (7) 758-762
  • 81 Mizuno S, Hirano K, Isayama H , et al. Prospective study of bezafibrate for the treatment of primary sclerosing cholangitis. J Hepatobiliary Pancreat Sci 2015; 22 (10) 766-770
  • 82 Trivedi PJ, Adams DH. Mucosal immunity in liver autoimmunity: a comprehensive review. J Autoimmun 2013; 46: 97-111
  • 83 Grant AJ, Lalor PF, Hübscher SG, Briskin M, Adams DH. MAdCAM-1 expressed in chronic inflammatory liver disease supports mucosal lymphocyte adhesion to hepatic endothelium (MAdCAM-1 in chronic inflammatory liver disease). Hepatology 2001; 33 (5) 1065-1072
  • 84 Liaskou E, Karikoski M, Reynolds GM , et al. Regulation of mucosal addressin cell adhesion molecule 1 expression in human and mice by vascular adhesion protein 1 amine oxidase activity. Hepatology 2011; 53 (2) 661-672
  • 85 University of Birmingham. A trial of BTT1023 in patients with primary sclerosing cholangitis (BUTEO). ClinicalTrials.gov. Bethesda, MD: National Institutes of Health. Available at: https://clinicaltrials.gov/ct2/show/NCT02239211 . Accessed July 31, 2015
  • 86 O'Hara SP, Tabibian JH, Splinter PL, LaRusso NF. The dynamic biliary epithelia: molecules, pathways, and disease. J Hepatol 2013; 58 (3) 575-582
  • 87 Yokoyama T, Komori A, Nakamura M , et al. Human intrahepatic biliary epithelial cells function in innate immunity by producing IL-6 and IL-8 via the TLR4-NF-kappaB and -MAPK signaling pathways. Liver Int 2006; 26 (4) 467-476
  • 88 Lichtman SN, Keku J, Clark RL, Schwab JH, Sartor RB. Biliary tract disease in rats with experimental small bowel bacterial overgrowth. Hepatology 1991; 13 (4) 766-772
  • 89 Lichtman SN, Okoruwa EE, Keku J, Schwab JH, Sartor RB. Degradation of endogenous bacterial cell wall polymers by the muralytic enzyme mutanolysin prevents hepatobiliary injury in genetically susceptible rats with experimental intestinal bacterial overgrowth. J Clin Invest 1992; 90 (4) 1313-1322
  • 90 Färkkilä M, Karvonen AL, Nurmi H , et al. Metronidazole and ursodeoxycholic acid for primary sclerosing cholangitis: a randomized placebo-controlled trial. Hepatology 2004; 40 (6) 1379-1386
  • 91 Tabibian JH, Weeding E, Jorgensen RA , et al. Randomised clinical trial: vancomycin or metronidazole in patients with primary sclerosing cholangitis - a pilot study. Aliment Pharmacol Ther 2013; 37 (6) 604-612
  • 92 Tabibian JH, Gossard A, El-Youssef M , et al. Prospective clinical trial of rifaximin therapy for patients with primary sclerosing cholangitis. Am J Ther 2014;
  • 93 Stanford University. Primary sclerosing cholangitis with oral vancomycin by the study of its antimicrobial and immunomodulating effects (PSC). ClinicalTrials.gov. Bethesda, MD: National Institutes of Health. Available at: https://clinicaltrials.gov/ct2/show/NCT01802073 . Accessed July 30, 2015
  • 94 Brigham and Women's Hospital. Fecal microbiota transplantation for the treatment of primary sclerosing cholangitis. ClinicalTrials.gov. Bethesda, MD: National Institutes of Health. Available at: https://clinicaltrials.gov/ct2/show/NCT02424175 . Accessed July 30, 2015
  • 95 van Nood E, Vrieze A, Nieuwdorp M , et al. Duodenal infusion of donor feces for recurrent Clostridium difficile . N Engl J Med 2013; 368 (5) 407-415
  • 96 Chapman MH, Webster GJM, Bannoo S, Johnson GJ, Wittmann J, Pereira SP. Cholangiocarcinoma and dominant strictures in patients with primary sclerosing cholangitis: a 25-year single-centre experience. Eur J Gastroenterol Hepatol 2012; 24 (9) 1051-1058
  • 97 Baluyut AR, Sherman S, Lehman GA, Hoen H, Chalasani N. Impact of endoscopic therapy on the survival of patients with primary sclerosing cholangitis. Gastrointest Endosc 2001; 53 (3) 308-312
  • 98 Stiehl A, Rudolph G, Klöters-Plachky P, Sauer P, Walker S. Development of dominant bile duct stenoses in patients with primary sclerosing cholangitis treated with ursodeoxycholic acid: outcome after endoscopic treatment. J Hepatol 2002; 36 (2) 151-156
  • 99 Academisch Medisch Centrum–Universiteit van Amsterdam (AMC-UvA). Short-term stenting versus balloon dilatation for dominant strictures in primary sclerosing cholangitis. ClinicalTrials.gov. Bethesda, MD: National Institutes of Health. Available at: https://clinicaltrials.gov/ct2/show/NCT01398917 . Accessed July 31, 2015
  • 100 John Hopkins University. Mitomycin C therapy for patients with primary sclerosing cholangitis. ClinicalTrials.gov. Bethesda, MD: National Institutes of Health. Available at: https://clinicaltrials.gov/ct2/show/NCT01688024 . Accessed July 31, 2015
  • 101 Rahbar R, Jones DT, Nuss RC , et al. The role of mitomycin in the prevention and treatment of scar formation in the pediatric aerodigestive tract: friend or foe?. Arch Otolaryngol Head Neck Surg 2002; 128 (4) 401-406
  • 102 Chung JH, Cosenza MJ, Rahbar R, Metson RB. Mitomycin C for the prevention of adhesion formation after endoscopic sinus surgery: a randomized, controlled study. Otolaryngol Head Neck Surg 2002; 126 (5) 468-474
  • 103 Eksteen B. Targeting of gut specific leucocyte recruitment in IBD by vedolizumab. Gut 2015; 64 (1) 8-10