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2001 DEC 19 - (NewsRx.com & NewsRx.net) -- by Michael Greer, senior medical writer - A fusion protein made up of HIV gp120 and interferon-(gamma) holds promise as a candidate HIV vaccine, according to researchers in the United Kingdom.
"Cytokines, including interferon (IFN)-(gamma), can be effective immunologic adjuvants but often lack the potency of other, more reactogenic compounds," explained Adele L. McCormick and colleagues at the University of Sheffield Medical School in Sheffield.
McCormick and coauthors found that fusing IFN-(gamma) with gp120 strongly enhanced its immunogenecity.
The researchers created a number of chimeric proteins with amino acid linkers of different lengths. A 34-amino acid linker produced the best results, they said.
This fusion protein produced more potent gp120-specific antibody responses than vaccines containing mixed but not fused gp120 and IFN-(gamma). Immunoglobulin G2a (IgG2a) antibodies were especially active, study data showed.
The vaccine studied also augmented endogenous IFN-(gamma) production while stimulating T-cell proliferation ...
Source: HighBeam Research, Antigen Fusion With Interferon-(gamma) Augments Efficacy.(Brief...