Hepatitis B vaccine co-administration influences the heterologous effects of neonatal BCG vaccination in a sex-differential manner

Vaccine. 2022 Feb 23;40(9):1334-1341. doi: 10.1016/j.vaccine.2022.01.005. Epub 2022 Jan 31.

Abstract

Introduction: Bacille Calmette-Guérin (BCG) and hepatitis B (HBV) vaccines are frequently given concomitantly at birth. Neonatal BCG vaccination induces off-target immunological effects. Whether HBV vaccine has immunomodulatory effects is unknown. As off-target effects might vary when vaccines are given simultaneously, this randomised controlled trial aimed to evaluate the influence of neonatal vaccination with BCG and/or HBV on heterologous immune responses.

Methods: A total of 185 neonates in Australia were randomised to receive either neonatal BCG-Denmark vaccine, HBV vaccine, both (BCG + HBV group), or none (No vaccine group). In-vitro responses to heterologous stimulants were assessed 7 days after vaccination. The influence of (i) randomisation group and (ii) sex on interferon-gamma (IFN-γ), monocyte chemoattractant protein-1 (MCP-1), and tumour necrosis factor-alpha (TNF-α) responses was analysed using linear regression.

Results: Overall, BCG vaccination alone or with HBV co-administration reduced IFN-γ and MCP-1 responses to heterologous stimulants. HBV vaccination alone did not alter heterologous cytokine responses. In general, males produced more IFN-γ and TNF-α than females. We observed a sex-differential effect in relation to the influence of HBV co-administration on the effect of BCG on heterologous responses. Compared with males in the No vaccine group, males in the BCG + HBV group had lower IFN-γ and MCP-1 responses. In contrast, compared with females in the No vaccine group, females in the BCG group had higher IFN-γ response and lower MCP-1 responses.

Conclusion: Neonatal BCG vaccination resulted in lower cytokine responses to unrelated pathogens. HBV co-administration did not have a significant impact on responses overall but influenced the heterologous effects of neonatal BCG vaccination in a sex-differential manner.

Keywords: Bacille Calmette-Guérin (BCG), Mycobacterium bovis; Hepatitis B vaccine; Neonate; Prevention; Vaccine non-specific effect.

Publication types

  • Randomized Controlled Trial
  • Research Support, Non-U.S. Gov't

MeSH terms

  • BCG Vaccine*
  • Cytokines
  • Female
  • Hepatitis B Vaccines*
  • Humans
  • Infant, Newborn
  • Interferon-gamma
  • Male
  • Vaccination

Substances

  • BCG Vaccine
  • Cytokines
  • Hepatitis B Vaccines
  • Interferon-gamma