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Concept: Primary biliary cirrhosis

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Background Primary biliary cholangitis (formerly called primary biliary cirrhosis) can progress to cirrhosis and death despite ursodiol therapy. Alkaline phosphatase and bilirubin levels correlate with the risk of liver transplantation or death. Obeticholic acid, a farnesoid X receptor agonist, has shown potential benefit in patients with this disease. Methods In this 12-month, double-blind, placebo-controlled, phase 3 trial, we randomly assigned 217 patients who had an inadequate response to ursodiol or who found the side effects of ursodiol unacceptable to receive obeticholic acid at a dose of 10 mg (the 10-mg group), obeticholic acid at a dose of 5 mg with adjustment to 10 mg if applicable (the 5-10-mg group), or placebo. The primary end point was an alkaline phosphatase level of less than 1.67 times the upper limit of the normal range, with a reduction of at least 15% from baseline, and a normal total bilirubin level. Results Of 216 patients who underwent randomization and received at least one dose of obeticholic acid or placebo, 93% received ursodiol as background therapy. The primary end point occurred in more patients in the 5-10-mg group (46%) and the 10-mg group (47%) than in the placebo group (10%; P<0.001 for both comparisons). Patients in the 5-10-mg group and those in the 10-mg group had greater decreases than those in the placebo group in the alkaline phosphatase level (least-squares mean, -113 and -130 U per liter, respectively, vs. -14 U per liter; P<0.001 for both comparisons) and total bilirubin level (-0.02 and -0.05 mg per deciliter [-0.3 and -0.9 μmol per liter], respectively, vs. 0.12 mg per deciliter [2.0 μmol per liter]; P<0.001 for both comparisons). Changes in noninvasive measures of liver fibrosis did not differ significantly between either treatment group and the placebo group at 12 months. Pruritus was more common with obeticholic acid than with placebo (56% of patients in the 5-10-mg group and 68% of those in the 10-mg group vs. 38% in the placebo group). The rate of serious adverse events was 16% in the 5-10-mg group, 11% in the 10-mg group, and 4% in the placebo group. Conclusions Obeticholic acid administered with ursodiol or as monotherapy for 12 months in patients with primary biliary cholangitis resulted in decreases from baseline in alkaline phosphatase and total bilirubin levels that differed significantly from the changes observed with placebo. There were more serious adverse events with obeticholic acid. (Funded by Intercept Pharmaceuticals; POISE ClinicalTrials.gov number, NCT01473524 ; Current Controlled Trials number, ISRCTN89514817 .).

Concepts: Clinical trial, Cirrhosis, Liver, Hepatology, Bilirubin, Primary biliary cirrhosis, Primary sclerosing cholangitis, Jaundice

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Primary sclerosing cholangitis (PSC) is a chronic cholestatic liver disease often leading to end-stage liver disease. Its pathogenesis remains largely unknown, although frequent concomitant IBD hints towards common factors underlying gut and bile duct inflammation. Considering the mounting evidence on the involvement of the intestinal microbiota in initiating and determining IBD phenotype, we investigated intestinal microbiota composition in patients with PSC.

Concepts: Digestive system, Cirrhosis, Hepatology, Bilirubin, Bile, Cholestasis, Primary biliary cirrhosis, Primary sclerosing cholangitis

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We genotyped 2,861 cases of primary biliary cirrhosis (PBC) from the UK PBC Consortium and 8,514 UK population controls across 196,524 variants within 186 known autoimmune risk loci. We identified 3 loci newly associated with PBC (at P < 5 × 10(-8)), increasing the number of known susceptibility loci to 25. The most associated variant at 19p12 is a low-frequency nonsynonymous SNP in TYK2, further implicating JAK-STAT and cytokine signaling in disease pathogenesis. An additional five loci contained nonsynonymous variants in high linkage disequilibrium (LD; r(2) > 0.8) with the most associated variant at the locus. We found multiple independent common, low-frequency and rare variant association signals at five loci. Of the 26 independent non-human leukocyte antigen (HLA) signals tagged on the Immunochip, 15 have SNPs in B-lymphoblastoid open chromatin regions in high LD (r(2) > 0.8) with the most associated variant. This study shows how data from dense fine-mapping arrays coupled with functional genomic data can be used to identify candidate causal variants for functional follow-up.

Concepts: Immune system, Cirrhosis, United Kingdom, Hepatology, Bilirubin, Autoimmune disease, Primary biliary cirrhosis, Primary sclerosing cholangitis

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The biochemical response to ursodeoxycholic acid (UDCA) in primary biliary cirrhosis (PBC) is a strong predictor of long-term outcome and thus facilitates the rapid identification of patients needing new therapeutic approaches. Numerous criteria for predicting outcome of treatment have been studied based on biochemical response to UDCA at 1 year. We sought to determine whether an earlier biochemical response at 3 or 6 months could as efficiently identify patients at risk of poor outcome, as defined by liver-related death, liver transplantation, and complications of cirrhosis. We analyzed the prospectively collected data of 187 patients with a median follow-up of 5.8 years (range: 1.3-14 years). The survival rates without adverse outcome at 5 years and 10 years were 86% and 63%. Under UDCA therapy, laboratory liver parameters experienced a most prominent improvement in the first 3 months (P < 0.0001) and then stayed relatively stable for the following months. The Paris, Barcelona, Toronto, and Ehime, but not the Rotterdam definition applied at 3, 6, and 12 months significantly discriminated the patients in terms of long-term outcome. Compared to biochemical responses evaluated after 1 year of UDCA therapy, biochemical responses at the third month demonstrated higher positive predictive value (PPV) but lower negative predictive value (NPV) and increased negative likelihood ratio (NLR) by all definitions; biochemical responses at the sixth month showed higher or the same PPV and NPV and lower NLR by all definitions.Conclusion: For the previously published criteria, biochemical responses at the sixth month can be used in place of those evaluated after 1 year of UDCA therapy. Our findings justify a more rapid identification of patients who need new therapeutic approaches. (HEPATOLOGY 2013.).

Concepts: Cirrhosis, Liver, Gastroenterology, Hepatology, Bilirubin, Primary biliary cirrhosis, Ursodiol

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BACKGROUND & AIMS:: Studies of primary biliary cirrhosis (PBC) phenotypes have largely been performed using small and used selected populations. Study size has precluded investigation of important disease sub-groups, such as men and young patients. We used a national patient cohort to obtain a better picture of PBC phenotypes. METHODS:: We performed a cross-sectional study using the United Kingdom-PBC patient cohort. Comprehensive data were collected for 2353 patients on diagnosis reports, response to therapy with ursodeoxycholic acid (UDCA), laboratory results, and symptom impact (assessed using the PBC-40 and other related measures). RESULTS:: Seventy-nine percent of the patients reported current UDCA therapy, with 80% meeting Paris response criteria. Men were significantly less likely to have responded to UDCA than women (72% vs 80% response, P <.05); male sex was an independent predictor of non-response on multivariate analysis. Age at diagnosis was strongly and independently associated with response to UDCA; response rates ranged from 90% among patients who presented with PBC when they were older than 70 y, to less than 50% for those younger than 30 y ( P <.0001). Patients who presented at younger ages were also significantly more likely not respond to UDCA therapy, based on alanine aminotransferase and aspartate aminotransferase response criteria, and more likely to report fatigue and pruritus. Women had mean fatigue scores 32% higher than men's ( P <.0001). The increase in fatigue severity in women was strongly related (r=0.58, P <.0001) to higher levels of autonomic symptoms ( P <.0001). CONCLUSIONS:: Among patients with PBC, response to UDCA treatment and symptoms are related to sex and age at presentation, with the lowest response rates and highest levels of symptoms in women presenting at <50 years of age. Increased severity of fatigue in women is related to increased autonomic symptoms, making dysautonomia a plausible therapeutic target.

Concepts: Cirrhosis, Symptoms, Symptom, Alanine transaminase, Hepatology, Post-concussion syndrome, Primary biliary cirrhosis, Ursodiol

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Ursodeoxycholic acid is administered to patients with primary biliary cirrhosis, a chronic progressive inflammatory autoimmune-mediated liver disease with unknown aetiology. Despite its controversial effects, the U.S. Food and Drug Administration has approved its usage for primary biliary cirrhosis.

Concepts: Cirrhosis, Liver, Hepatology, Bilirubin, Primary biliary cirrhosis, Primary sclerosing cholangitis, Liver biopsy, Ursodiol

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INTRODUCTION: Ischemic cholangitis in intensive care unit is a recently reported liver disease in patients who have had a prolonged mechanical ventilation and vasopressive drug support for multiple organ deficiency. Prognosis is usually poor and the only life-saving therapy is liver transplantation despite ursodesoxycholic acid treatment. CASE REPORT: We report a 63-year-old man who presented with a sclerosis cholangitis after a month in intensive care unit, effectively treated with fenofibrate and ursodesoxycholic acid. Recent reports underline fenofibrate efficacy in the treatment of primary biliary cirrhosis, especially in association with ursodesoxycholic acid. This treatment has prevented liver transplantation for our patient with a correct quality of life. CONCLUSION: The addition of fibrate to ursodesoxycholic acid improves persistent cholestasis in sclerosing cholangitis.

Concepts: Cirrhosis, Liver, Gastroenterology, Hepatology, Bilirubin, Cholestasis, Primary biliary cirrhosis, Primary sclerosing cholangitis

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The efficacy of ursodeoxycholic acid (UDCA) on long-term outcome of primary biliary cirrhosis (PBC) has been less documented in Chinese cohort. We aimed to assess the therapeutic effect of UDCA on Chinese patients with PBC. In the present study, 67 patients with PBC were treated with UDCA (13-15 mg·kg(-1)·day(-1)) and followed up for 2 years to evaluate the changes of symptoms, laboratory values and histological features. As the results indicated, fatigue and pruritus were obviously improved by UDCA, particularly in patients with mild or moderate symptoms. The alkaline phosphatase and γ-glutamyl transpetidase levels significantly declined at year 2 comparing to baseline values, with the most profound effects achieved in patients at stage 2. The levels of alanine aminotransferase and aspartate aminotransferase significantly decreased whereas serum bilirubin and immunoglobulin M levels exhibited no significant change. Histological feature was stable in patients at stages 1-2 but still progressed in patients at stages 3-4. The biochemical response of patients at stage 2 was much better than that of patients at stages 3-4. These data suggest that, when treated in earlier stage, patients in long-term administration of UDCA can gain favorable results not only on symptoms and biochemical responses but also on histology. It is also indicated that later histological stage, bad biochemical response and severe symptom may be indicators of poor prognosis for UDCA therapy.

Concepts: Amino acid, Cirrhosis, Liver function tests, Hepatology, Bilirubin, Primary biliary cirrhosis, Primary sclerosing cholangitis, Ursodiol

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For the identification of susceptibility loci for primary biliary cirrhosis (PBC), a genome-wide association study (GWAS) was performed in 963 Japanese individuals (487 PBC cases and 476 healthy controls) and in a subsequent replication study that included 1,402 other Japanese individuals (787 cases and 615 controls). In addition to the most significant susceptibility region, human leukocyte antigen (HLA), we identified two significant susceptibility loci, TNFSF15 (rs4979462) and POU2AF1 (rs4938534) (combined odds ratio [OR] = 1.56, p = 2.84 × 10(-14) for rs4979462, and combined OR = 1.39, p = 2.38 × 10(-8) for rs4938534). Among 21 non-HLA susceptibility loci for PBC identified in GWASs of individuals of European descent, three loci (IL7R, IKZF3, and CD80) showed significant associations (combined p = 3.66 × 10(-8), 3.66 × 10(-9), and 3.04 × 10(-9), respectively) and STAT4 and NFKB1 loci showed suggestive association with PBC (combined p = 1.11 × 10(-6) and 1.42 × 10(-7), respectively) in the Japanese population. These observations indicated the existence of ethnic differences in genetic susceptibility loci to PBC and the importance of TNF signaling and B cell differentiation for the development of PBC in individuals of European descent and Japanese individuals.

Concepts: Immune system, Cirrhosis, Hepatology, Genome-wide association study, Human leukocyte antigen, Primary biliary cirrhosis, Primary sclerosing cholangitis, Autoimmune hepatitis

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The recent addition of IgG4-associated cholangitis (IAC), also called IgG4-related sclerosing cholangitis (IRSC) to the spectrum of chronic cholangiopathies has created the clinical need for reliable methods to discriminate between IAC and the more common cholestatic entities primary (PSC) and secondary (SSC) sclerosing cholangitis. The current AASLD practice guidelines for PSC advise the measurement of sIgG4 in PSC patients, but interpretation of elevated sIgG4 levels remains unclear. We aimed to provide an algorithm to distinguish IAC from PSC using sIgG analyses. We measured total IgG and IgG subclasses in serum samples of IAC (n=73) and PSC (n=310) patients, as well as in serum samples of disease controls (primary biliary cirrhosis; n=22). sIgG4 levels were elevated above the upper limit of normal (ULN=>1.4 g/L) in 45 PSC patients (15%, 95% CI 11-19). The highest specificity and positive predictive value (100%) for IAC were reached when applying the 4x ULN (sIgG4> 5.6 g/L) cut-off with a sensitivity of 42% (95% CI 31-55). However, in patients with a sIgG4 between 1x and 2x ULN (n=38/45) the PPV of sIgG4 for IAC is only 28%. In this subgroup, the sIgG4/sIgG1 ratio cut-off 0.24 yielded a sensitivity of 80% (95% CI 51-95), a specificity of 74% (95% CI 57-86), a PPV of 55% (95% CI 33-75) and a NPV of 90% (95% CI 73-97). Conclusion: Elevated sIgG4 (> 1.4 g/L) occurred in 15% of patients with PSC. In patients with a sIgG4 >1.4 and <2.8 g/L, incorporating the IgG4/IgG1 ratio with a cut-off at 0.24 in the diagnostic algorithm significantly improved PPV and specificity. We propose a new diagnostic algorithm based on IgG4/IgG1 ratio that may be used in clinical practice to distinguish PSC from IAC. (Hepatology 2013;).

Concepts: Positive predictive value, Cirrhosis, Gastroenterology, Hepatology, Bilirubin, Cholestasis, Primary biliary cirrhosis, Primary sclerosing cholangitis