USC Scientist Develops Virus That Targets HIV: Using a Virus to Kill a Virus
August 8, 2011. From University of South California press office. In what represents an important step toward curing HIV, a USC scientist
has created a virus that hunts down HIV-infected cells.
Dr. Pin Wang's lentiviral vector latches onto HIV-infected cells,
flagging them with what is called "suicide gene therapy" — allowing
drugs to later target and destroy them.
"If you deplete all of the HIV-infected cells, you can at least
partially solve the problem," said Wang, chemical engineering professor
with the USC Viterbi School of Engineering.
The process is analogous to the military practice of "buddy lasing" —
that is, having a soldier on the ground illuminate a target with a
laser to guide a precision bombing strike from an aircraft.
Like a precision bombing raid, the lentiviral vector approach to
targeting HIV has the advantage of avoiding collateral damage, keeping
cells that are not infected by HIV out of harm's way. Such accuracy has
not been achieved by using drugs alone, Wang said.
So far, the lentiviral vector has only been tested in culture dishes
and has resulted in the destruction of about 35 percent of existing HIV
cells. While that may not sound like a large percentage, if this
treatment were to be used in humans, it would likely be repeated
several times to maximize effectiveness.
Among the next steps will be to test the procedure in mice. While this
is an important breakthrough, it is not yet a cure, Wang said.
"This is an early stage of research, but certainly it is one of the
options in that direction," he said.
Wang's
research, which was funded by the National Institutes of Health,
appears in the July 23 issue of Virus Research.
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