Kremer, Andreas E.

ABSTRACT Background and Aims Pruritus is a frequent and debilitating symptom in primary biliary cholangitis (PBC), substantially impairing sleep, mood and quality of life. Peroxisome proliferator‐activated receptor (PPAR) agonists are promising second‐line therapies for patients with an inadequate response to ursodeoxycholic acid (UDCA). We conducted a systematic review and meta‐analysis to evaluate the efficacy of PPAR agonists on pruritus and health‐related quality of life (HRQoL) in PBC. Methods We systematically searched for randomised placebo‐controlled trials (RCTs) of PPAR agonists in PBC through December 2025. Eligible studies reported validated pruritus or HRQoL outcomes. Main outcomes were NRS and PBC‐40 total score. Pooled estimates were calculated using random‐effects models and expressed as mean differences (MD) with 95% confidence intervals (CI). Results Five RCTs evaluating bezafibrate, elafibranor and seladelpar ( n = 660; 390 PPAR agonist; 270 placebo) met the inclusion criteria. For pruritus intensity analyses, data were restricted to participants with moderate‐to‐severe baseline symptoms (NRS ≥ 4) when available. PPAR agonists significantly reduced NRS scores at 3 months (MD, −1.39; 95% CI: −2.49 to −0.29), 6 months (MD, −1.17; 95% CI: −1.96 to −0.38) and 12 months (MD, −1.73; 95% CI, −3.00 to −0.46); in individual agent analyses, bezafibrate and seladelpar reached statistical significance at two or more time points. While improvements were also noted in PBC‐40 itch‐domain and 5D‐itch score, an impact on overall HRQoL as reflected by PBC‐40 total score could not be demonstrated, with a lower level of certainty. Conclusions PPAR agonists, notably bezafibrate and seladelpar, reduce pruritus severity in PBC patients with moderate‐to‐severe symptoms and consistently improve itch‐specific outcomes. However, effects on global HRQoL remain uncertain. These findings underscore the incorporation of validated, symptom‐focused endpoints in future PBC trials.

Background and Aims: Normal alkaline phosphatase (ALP) levels in ursodeoxycholic acid (UDCA)-treated patients with primary biliary cholangitis (PBC) are associated with better long-term outcome. However, second-line therapies are currently recommended only when ALP levels remain above 1.5 times the upper limit of normal (×ULN) after 12-month UDCA. We assessed whether, in patients considered good responders to UDCA, normal ALP levels were associated with significant survival gains. Approach and Results: We performed a retrospective cohort study of 1047 patients with PBC who attained an adequate response to UDCA according to Paris-2 criteria. Time to liver-related complications, liver transplantation, or death was assessed using adjusted restricted mean survival time (RMST) analysis. The overall incidence rate of events was 17.0 (95% CI: 13.7–21.1) per 1000 out of 4763.2 patient-years. On the whole population, normal serum ALP values (but not normal gamma-glutamyl transpeptidase (GGT), alanine aminotransferase (ALT), or aspartate aminotransferase (AST); or total bilirubin < 0.6 ×ULN) were associated with a significant absolute complication-free survival gain at 10 years (mean 7.6 months, 95% CI: 2.7 - 12.6 mo.; p = 0.003). In subgroup analysis, this association was significant in patients with a liver stiffness measurement ≥ 10 kPa and/or age ≤ 62 years, with a 10-year absolute complication-free survival gain of 52.8 months (95% CI: 45.7–59.9, p < 0.001) when these 2 conditions were met. Conclusions: PBC patients with an adequate response to UDCA and persistent ALP elevation between 1.1 and 1.5 ×ULN, particularly those with advanced fibrosis and/or who are sufficiently young, remain at risk of poor outcome. Further therapeutic efforts should be considered for these patients.