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© Research
Publication : Infection and immunity

Genetic control of antibody responses induced against an antigen delivered by recombinant attenuated Salmonella typhimurium

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Infection and immunity - 01 Oct 1994

Fayolle C, O'Callaghan D, Martineau P, Charbit A, Clément JM, Hofnung M, Leclerc C

Link to Pubmed [PMID] – 7927689

Infect. Immun. 1994 Oct;62(10):4310-9

Recombinant derivatives of nonpathogenic bacteria such as attenuated Salmonella typhi have the potential to be used for delivery of heterologous antigens to the immune system. Genetic factors may modulate the immune responses to these live attenuated organisms and could therefore modify the immunogenicity of future human vaccines. In the present study, we compared the antibody responses of Ity or H-2 congenic strains of mice to a foreign antigen expressed by the murine attenuated aroA S. typhimurium strain. Our results demonstrate that the Ity gene may modulate the antibody responses to the foreign antigen but that the major genetic influence is exerted by H-2 genes, which control the capacity of mice to respond to the antigen expressed by recombinant attenuated Salmonella cells. This genetic control is related to differences in responsiveness of different strains of mice to low doses of antigen. Increasing the amount of foreign antigen expressed by recombinant Salmonella cells overcame the genetic restriction of these responses. These findings are potentially of great importance for the design of live vaccines for humans and show that care must be taken to optimize the amount of foreign antigen delivered to the immune system.

http://www.ncbi.nlm.nih.gov/pubmed/7927689