HLA-DR Mismatch and Black Race Are Associated With Recurrent Autoimmune Hepatitis After Liver Transplantation

• Main Authors: Marshall McCabe, IV, MD, Natalia Rush, MD, Craig Lammert, MD, Kavish R. Patidar, MD, Lauren Nephew, MD, Romil Saxena, MD, Burcin Ekser, MD, James Salven, MS, Chandrashekhar Kubal, MD, PhD, Marwan Ghabril, MD
• Format: Article
• Language: English
• Published: Wolters Kluwer 2021-07-01
• Series: Transplantation Direct
• Online Access: http://journals.lww.com/transplantationdirect/fulltext/10.1097/TXD.0000000000001160

Background. The predictors of recurrent autoimmune hepatitis (R-AIH) after liver transplantation (LT) are heterogeneous with limited data to guide immunosuppression, with little data on impact of race. Aims. To describe the incidence, predictors, and outcomes of R-AIH. Methods. We studied patients undergoing LT for AIH during 2000–2017 at our center. Liver biopsies were performed for clinical indications. R-AIH was defined using clinical and histologic criteria. Results. Among 75 patients undergoing LT for AIH (mean age 45 ± 16, 65% female individuals, 19% Black), 71 (95%) received antithymocyte globulin induction with tacrolimus-based immunosuppression. R-AIH developed in 20 (27%) patients at a median interval of 313 d (interquartile range, 155–1205). R-AIH was associated with level 2 HLA-DR mismatch (hazard ratio, 3.6; (95% confidence interval, 1.3-9.9; P = 0.01) and Black race (hazard ratio, 4.5; 95% confidence interval, 1.8-11.8; P = 0.002)] in the multivariable analysis. R-AIH developed in 62% of patients with level 2 HLA-DR mismatch on single-agent immunosuppression but in <20% of patients with no or 1 HLA-DR mismatch regardless of maintenance immunosuppression. R-AIH developed in 8 (57%) of 14 Black patients (71% on single-agent and 43% on dual-agent maintenance immunosuppression). Patient and graft survival were not impacted by R-AIH over a median follow-up of 8.3 y (interquartile range, 3–12). Conclusions. High-level HLA-DR mismatch and Black recipient race are associated with an increased risk of R-AIH. Immunosuppression did not predict R-AIH, but higher rates of disease recurrence with single-agent maintenance immunosuppression with these risk factors were observed and may guide maintenance immunosuppression in LT for AIH.