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Scientist develops virus that targets HIV: Using a virus to kill a virus

Date:
August 9, 2011
Source:
University of Southern California
Summary:
In what represents an important step toward curing HIV, a scientist has created a virus that hunts down HIV-infected cells.
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USC chemical engineering professor, Pin Wang.
Credit: Image courtesy of University of Southern California

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.


Story Source:

The above post is reprinted from materials provided by University of Southern California. The original item was written by Robert Perkins. Note: Materials may be edited for content and length.


Journal Reference:

  1. Chi-Lin Lee, Jason Dang, Kye-Il Joo, Pin Wang. Engineered lentiviral vectors pseudotyped with a CD4 receptor and a fusogenic protein can target cells expressing HIV-1 envelope proteins. Virus Research, 2011; DOI: 10.1016/j.virusres.2011.07.010

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University of Southern California. "Scientist develops virus that targets HIV: Using a virus to kill a virus." ScienceDaily. ScienceDaily, 9 August 2011. <www.sciencedaily.com/releases/2011/08/110808154132.htm>.
University of Southern California. (2011, August 9). Scientist develops virus that targets HIV: Using a virus to kill a virus. ScienceDaily. Retrieved August 31, 2015 from www.sciencedaily.com/releases/2011/08/110808154132.htm
University of Southern California. "Scientist develops virus that targets HIV: Using a virus to kill a virus." ScienceDaily. www.sciencedaily.com/releases/2011/08/110808154132.htm (accessed August 31, 2015).

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