Researchers have isolated antibodies that bind securely to HIV and disable the virus, according to a findings reported in PNAS and covered by News Medical.
Researchers from Vanderbilt University in Nashville, Tenn., focused on the loop-like structures of antibodies that link to HIV. The structures consist of 28 amino acids linked together in different combinations. Using computer programs, researchers were able to pinpoint which amino acid combination latched mostly tightly to HIV. They then optimized sequences to simulate vaccination events and fused these sequences to an antibody called PG9, which is known to neutralize HIV. These redesigned antibodies were able to disable HIV in laboratory testing.
The natural production of HIV neutralizing antibodies within the body typically take a year to occur and only happen in one-third of people. The researcher's findings suggest a structure-based vaccine for HIV may be possible.
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