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2004 MAR 31 - (NewsRx.com & NewsRx.net) -- IL-12 enhances protective immunity in mice engendered by immunization with recombinant 14-kDa Schistosoma mansoni fatty acid-binding protein through an IFN-gamma and TNF-alpha dependent pathway.
"Herein, we tested the ability of IL-12 to enhance protection induced by recombinant Sm14 (rSml4). Mice immunization with three doses of 25 jig of rSml4 was able to induce 25% protection in mice against challenge. However, co-administration of exogenous IL-12 enhanced protective immunity engendered by rSm14 from 25 to 42.2%. Higher levels of IgG2a and TNF-alpha were observed in mice immunized with rSml4 plus IL-12 compared to animals vaccinated with rSml4 alone," scientists in Brazil report.
"Regarding other cytokines, significant amounts of IFN-gamma were measured in splenocyte culture supernatants of rSm14/IL-12 or rSm14 vaccinated mice and no IL-4 was detected," stated Cristina T. Fonseca and collaborators at the Federal University of Minas Gerais and the Oswaldo Cruz Foundation. "In an attempt to determine the role of IFN-gamma and TNF-alpha in IL-12 induced immunity, IFN-gamma and TNFR-p55 knockout mice were immunized with rSm 14/IL-12 and no protection was achieved. Therefore, protection induced by rSm 14/IL-12 was shown to ...
Source: HighBeam Research, IL-12 enhances immunity of Schistosoma mansoni fatty acid-binding...