TY - JOUR TI - Biologic Therapy Carries a Very Low Risk of Reactivation in Hepatitis B Surface Antigen-Negative Phase of Hepatitis B AB - Background: The risk of hepatitis B reactivation in hepatitis B surface antigen-negative phase of hepatitis B virus-infected patients exposed to biologic agents is not clear. We aimed to investigate the reactivation rate in hepatitis B surface antigen-negative phase of hepatitis B virus-infected patients after biologic therapy. Methods: Patients followed at gastroenterology, rheumatology, and dermatology clinics with a diagnosis of immune-mediated inflam- matory diseases were screened. Immune-mediated inflammatory diseases patients exposed to biologic agents with a negative hepatitis B surface antigen and positive hepatitis B core immunoglobulin G antibody were included in the study. Results: We screened 8266 immune-mediated inflammatory disease patients, and 2484 patients were identified as exposed to biologic agents. Two hundred twenty-one patients were included in the study. The mean age was 54.08 ± 11.69 years, and 115 (52.0%) patients were female. The median number of different biologic subtype use was 1 (range: 1-6). The mean biologic agent exposure time was 55 (range: 2-179) months. One hundred and fifty-two (68.8%) patients used a concomitant immunomodulatory agent, and 84 (38.0%) patients were exposed to corticosteroids during biologic use. No hepatitis B reactivation with a reverse seroconversion of hepatitis B surface antigen positivity was seen. Antiviral prophylaxis for hepatitis B was applied to 48 (21.7%) patients. Hepatitis B virus-DNA was screened in 56 (25.3%) patients prior to the biologic exposure. Two patients without antiviral prophylaxis had hepatitis B virus-DNA reactivation with a negative hepatitis B surface antigen during exposure to the biologic agent. Conclusion: We found 2 reactivations and no hepatitis B surface antigen seroconversion in our cohort. Antiviral prophylaxis for patients exposed to biologic agents may need to be discussed in more detail. AU - Ergun, Tulin AU - ergenç, ilkay AU - Kani, Haluk Tarik AU - aslan, rahmi AU - alahdab, yesim AU - Inanc, Nevsun AU - ATAGUNDUZ, MEHMET PAMIR AU - Direskeneli, Haner AU - Sevik, Gizem AU - Seckin Gencosmanoglu, Dilek AU - Cömert Özer, Elif AU - ALIBAZ-ONER, FATMA AU - Karabacak, Murat AU - Mehdiyev, Shahin AU - Jafarov, Fuad AU - Abacar, Kerem Yiğit AU - Kutlug agackiran, Seda AU - ATUG, OZLEN DO - 10.5152/tjg.2022.22196 PY - 2023 JO - Turkish Journal of Gastroenterology VL - 34 IS - 2 SN - 1300-4948 SP - 73 EP - 77 DB - TRDizin UR - http://search/yayin/detay/1173588 ER -