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Adjuvant effects of amorphous silica and of aluminium hydroxide on IgE and IgG1 antibody production in different inbred mouse strains.

The adjuvant effects of an amorphous silica (Aerosil) and of A1(OH)3 on primary and secondary IgE and IgG1 immune responses to small doses of OA were studied comparatively in BALB/c, C57BL, DBA/1, AKR, DBA/2 and SJL inbred mouse strains. During the primary response, all mouse strains produced both IgG1 and IgE antibodies when antigen was given with A1(OH)3, whereas only DBA/1, BALB/c and DBA/2 mice produced IgG1 and/or IgE antibodies when Aerosil was used as the adjuvant. A booster effect, higher than that obtained by A1(OH)3, was induced by Aerosil in all mouse strains. The adjuvant effect of Aerosil was more selectively directed to the production of IgE antibody.