Saponin adjuvant primes for a dominant interleukin-10 production to ovalbumin and to Trypanosoma cruzi antigen

Immunology
C E TadokoroI A Abrahamsohn

Abstract

The adjuvant activity of saponin for T-cell responses was evaluated and compared with that of complete Freund's adjuvant (CFA) in two antigen systems: a lysate of the protozoa Trypanosoma cruzi and ovalbumin (OA). Strong delayed-type hypersensitivity and T-cell proliferate responses, comparable with those stimulated by CFA, were observed for both antigens following immunization with saponin as adjuvant. Upon in vitro secondary antigen stimulation, high interleukin-10 (IL-10) and low interferon-gamma (IFN-gamma) levels were observed in lymph node (LN) cell cultures from saponin-immunized mice in contrast with the high IFN-gamma and decreased IL-10 production by LN cells from CFA-immunized mice. Production of IL-10 and IFN-gamma in these conditions was CD4-activation dependent. Concanavalin A (Con A)-stimulated interleukin-4 (IL-4) production was higher in saponin-immunized mice than in CFA-immunized mice. IL-10 produced by LN cells from saponin-immunized mice suppressed IFN-gamma production and Con A-induced proliferation. Taken together, these data are consistent with in vivo stimulation of both T-helper (Th)1 and Th2-type cells by immunization with saponin; in vitro a Th2-type cytokine response with high IL-10 production predo...Continue Reading

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Citations

Feb 5, 2000·Comparative Immunology, Microbiology and Infectious Diseases·A EstradaB Barl
Oct 29, 2008·Fish & Shellfish Immunology·P A UránJ H W M Rombout
Aug 25, 2004·Journal of Autoimmunity·Carlos E TadokoroIses A Abrahamsohn
Aug 17, 2000·The Journal of Veterinary Medical Science·I IgarashiT Mikami

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