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IL-12 enhances immunity of Schistosoma mansoni fatty acid-binding protein.

Vaccine Weekly

| March 31, 2004 | COPYRIGHT 2004 NewsRX. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan.  All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)Copyright

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 ...

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Source: HighBeam Research, IL-12 enhances immunity of Schistosoma mansoni fatty acid-binding...

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