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Published on: May 12, 2023
Immunopotentiation of live brucellosis vaccine by adjuvants
Alexander A Denisov1, Yulia S Korobovtseva, Olga M Karpova
1State Federal Enterprise for Science Research Centre for Toxicology and Hygienic Regulation of Biopreparations at Federal Medico-Biological Agency (RCT&HRB), Bld.102A, Lenin Str., Serpukhov, Moscow Region, Russia. toxic@online.stack.net
Abstract:
In a series of studies in SPF and conventional guinea pigs, various adjuvants (larifan, polyoxidonium-PO, natrium thiosulphate-NT, TNF-β and Ribi adjuvant system-RAS) were evaluated for their ability to enhance immune responses to the live brucellosis vaccine, Brucella abortus strain 82-PS (penicillin-sensitive). Combining adjuvants with S82-PS increased synthesis of antibodies against rough (R) and smooth (S) Brucella antigens. Dynamics and levels of antibodies differed dependent upon the adjuvant. Adjuvants enhanced cell-mediated responses to S82-PS, and phagocytosis by macrophages. Humoral and cellular immune responses stimulated by the adjuvants correlated with increased vaccine protection against experimental challenge. The highest protection was demonstrated by combining TNF-β or PO with S82-PS. Our data demonstrates the potential of adjuvants to improve immunogenic properties of live brucellosis vaccines.
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