The Effects of Increased Dose of Hepatitis B Vaccine on Mother-to-child Transmission and Immune Response for Infants Born to Mothers with Chronic Hepatitis B Infection: a Prospective, Multicenter, Large-sample Cohort Study

Overview

Journal BMC Med

Publisher Biomed Central

Specialty General Medicine

Date 2021 Jul 13

PMID 34253217

Citations 6

Authors

Xiaohui Zhang

Huaibin Zou

Yu Chen

Hua Zhang

Ruihua Tian

Jun Meng

Yunxia Zhu

Huimin Guo

Erhei Dai

Baoshen Zhu

Zhongsheng Liu

Yanxia Jin

Yujie Li

Liping Feng

Hui Zhuang

Calvin Q Pan

Jie Li

Zhongping Duan

Affiliations

Soon will be listed here.

Abstract

Background: Appropriate passive-active immunoprophylaxis effectively reduces mother-to-child transmission (MTCT) of hepatitis B virus (HBV), but the immunoprophylaxis failure was still more than 5% under the current strategy. The study objective was to investigate the effects of high dose of HB vaccine on MTCT and immune response for infants born to hepatitis B surface antigen (HBsAg)-positive mothers.

Methods: This was a prospective, multicenter, large-sample cohort study in four sites of China, and 955 pairs of HBsAg-positive mothers and their infants were enrolled in our investigation. The infants were given 10 μg or 20 μg HB vaccine (at age 0, 1, and 6 months) plus HB immunoglobulin (at age 0 and 1 month). Serum HBsAg, antibody to HBsAg (anti-HBs), and/or HBV DNA levels in the infants were determined at age 12 months. The safety of 20 μg HB vaccine was evaluated by adverse events and observing the growth indexes of infants.

Results: Thirteen of 955 infants were HBsAg-positive at 12 months. Stratification analysis showed that immunoprophylaxis failure rates in the 20 μg group were not significantly different from the 10 μg group, whatever maternal HBV load was high or not. But the high dose of HB vaccine significantly reduced low-response rate (anti-HBs 10-100 IU/L) (P = 0.002) and middle-response rate (anti-HBs 100-1000 IU/L) (P = 0.022) and improved high-response rate (anti-HBs ≥ 1000 IU/L) (P < 0.0001) in infants born to mothers with HBV DNA < 5 log IU/mL. For infants born to mothers with HBV DNA ≥ 5 log IU/mL, 20 μg HB vaccine did not present these above response advantages. The 20 μg HB vaccine showed good safety for infants.

Conclusions: The 20 μg HB vaccine did not further reduce immunoprophylaxis failure of infants from HBsAg-positive mothers, but increased the high-response and decreased low-response rates for infants born to mothers with HBV DNA < 5 log IU/mL.

Trial Registration: Chinese Clinical Trial Registry, ChiCTR-PRC-09000459.

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