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10 Jul 2010
US scientists have announced the discovery of three new powerful antibodies, the strongest of which neutralizes 91& of HIV strains, significantly more than any previously known antibody.
The HIV antibodies were discovered in the cells of a 60-year-old African-American gay man, known in the scientific literature as Donor 45, whose body made the antibodies naturally. The trick for scientists now is to develop a vaccine or other methods to make anyone's body produce them as well.
That effort "will require work," said Gary Nabel, director of the Vaccine Research Center at the National Institute of Allergy and Infectious Diseases, who was a leader of the research. "We're going to be at this for a while" before any benefit is seen in the clinic, he said.
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Donor 45's antibodies didn't protect him from contracting HIV. That is likely because the virus had already taken hold before his body produced the antibodies. He is still alive, and when his blood was drawn, he had been living with HIV for 20 years.
While he has produced the most powerful HIV antibody yet discovered, researchers say they don't know of anything special about his genes that would make him unique. They expect that most people would be capable of producing the antibodies, if scientists could find the right way to stimulate their production.
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science
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medicine
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hiv/aids
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