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GW researcher unlocks next step in creating HIV-1 immunotherapy using fossil virus
Date:7/17/2014

WASHINGTON (July 17, 2014) The road to finding a cure for HIV-1 is not without obstacles. However, thanks to cutting-edge research by Douglas Nixon, M.D., Ph.D., and colleagues, performed at the George Washington University (GW), Oregon Health & Science University, the University of Rochester, and UC San Francisco, the scientific community is one step closer to finding a viable immunotherapy option for HIV-1, using an immune attack against a fossil virus buried in the genome.

A major hurdle in eradicating HIV-1 has been outsmarting the frequent mutations, or changing coats of the virus caused by its high rate of replication. Researchers have focused on neutralizing antibodies directed against the HIV-1 envelope in order to stop the virus, but the antibodies haven't been able to keep up with this constant change. Nixon's research team found that the right antibody directed against an ancestral fossil virus buried within everyone's genomes might be able to target HIV-1 and neutralize it.

"What we've found is an antibody that recognizes these fossil viruses within all our genomes, which can neutralize HIV-1 in a way that has never been seen before," said Nixon, chair of the Department of Microbiology, Immunology, and Tropical Medicine at the GW School of Medicine and Health Sciences. "We have found in vitro, in the test tube, that you can actually have an antibody work against HIV-1, which is not directed against the HIV-1 virus itself."

In his research, Nixon and colleagues found that by targeting the fossil virus an ancestral version of a retrovirus that has become a largely useless part of our DNA that these antibodies could focus on a single fixed envelope, as it does not change like the constant changes of HIV-1's envelope outer coat. This discovery provides a new, therapeutic target to beat this
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Contact: Lisa Anderson
lisama2@gwu.edu
202-994-3121
George Washington University
Source:Eurekalert

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