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Genetic regulation of immune responses to vaccines in early life

M J Newport1, T Goetghebuer, H A Weiss

  • 1Department of Medicine, University of Cambridge, UK. melanie.newport@cimr.cam.ac.uk

Genes and Immunity
|January 23, 2004
PubMed

Insights

Genetic factors significantly influence infant vaccine responses. Understanding these genetic components can lead to improved infant vaccines and adjuvants, enhancing protection against childhood infectious diseases.

Area of Science:

  • Immunology
  • Genetics
  • Vaccinology

Background:

  • Infant immunization is crucial for preventing childhood infectious diseases but is hindered by immature immune systems.
  • Understanding genetic and environmental influences on infant vaccine responses is key to improving immunogenicity.

Purpose of the Study:

  • To investigate the role of genetic and environmental factors in modulating immune responses to infant vaccines.
  • To identify specific genetic targets for developing more effective infant vaccines and adjuvants.

Main Methods:

  • A twin study involving 207 Gambian twin pairs, recruited at birth and assessed at 5 months of age.
  • Measurement of immune responses (antibody, interferon-gamma, interleukin-13) to BCG, polio, hepatitis B, diphtheria, pertussis, and tetanus vaccines.
  • Estimation of genetic and environmental components of variation using intrapair correlations in monozygous and dizygous twins.

Main Results:

  • High heritability observed for antibody responses to hepatitis B (77%), oral polio (60%), tetanus (44%), and diphtheria (49%) vaccines.
  • Significant heritability found for interferon-gamma and interleukin-13 responses to tetanus, pertussis, and BCG antigens (39-65%).
  • Non-HLA genes predominantly controlled antibody responses, while HLA class II genes were key for BCG responses.

Conclusions:

  • Genetic factors, especially non-HLA genes, significantly influence immune responses to infant vaccinations.
  • Identifying specific genes involved offers potential for developing novel vaccines and adjuvants for young infants, independent of HLA.
  • This research provides a foundation for targeted strategies to enhance infant vaccine efficacy.

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