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HIV/AIDS Vaccine

Tat protein and toxoid have similar immunogenicity

Published in AIDS Weekly, April 21st, 2003

by Michael Greer, senior medical writer - Two experimental HIV vaccines based on the viral transactivation protein Tat elicit comparably effective humoral responses in animals, researchers say.

HIV Tat "is essential for virus replication and is a candidate vaccine antigen," explained Ilia Tikhonov and colleagues at the University of Maryland Biotechnology Institute. "Macaques immunized with Tat or chemically modified Tat toxoid having the same clade B sequence developed strong antibody responses."

Both of these vaccine strategies produced Tat-specific neutralizing antibodies in treated animals, although the breadth of antisera cross-reactivity was...

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