Press Release

 
VGX Pharmaceuticals Initiates Phase I/II Clinical Trials of PICTOVIR™ for the Treatment of HIV Infection

Blue Bell, PA – December 15, 2004 –

VGX Pharmaceuticals announced today that the company and the AIDS Clinical Trials Group (ACTG) have initiated Phase I/II clinical trials of PICTOVIR™ (VGX-410) for the treatment of HIV infection. The company and the ACTG received the Investigative New Drug application (IND) approval from the Food and Drug Administration (FDA) on December1, 2004.

PICTOVIR™ is an investigational drug for the treatment of HIV infection. Currently 30 to 50 percent of patients who are treated with existing drug regimens develop resistance to one or more antiretroviral drugs, reducing the treatment options available to them. Since there is no known effective cure or vaccine for AIDS, HIV drug resistance has become a serious treatment failure and concern. Patients desperately need a new class of drugs to combat drug resistances observed with existing compounds.

“This is an important milestone both for VGX Pharmaceuticals and for the treatment of HIV infection,” says J. Joseph Kim, Ph.D., President and CEO of VGX Pharmaceuticals. “PICTOVIR™ represents the first drug targeting the Pre-Integration Complex Translocation (PICT) site of a cell. This could significantly reduce mutation effects of the virus. It is an orally active, small-molecule drug that provides once a day convenience.”

PICTOVIR™ works by inhibiting the binding of one of HIV-1 virus’ accessory proteins, Vpr, to its receptors. Vpr plays an important role for the survival of the HIV-1 virus in human cells, and by inhibiting it the virus is unable to replicate in many of the body’s important immune cells. In cell culture assays and in animal models, treatment of virus infected human primary cells by PICTOVIR™ at low doses resulted in a significant inhibition of viral replication of all of the laboratory-adapted and clinical primary isolates of HIV-1 virus. “PICTOVIR™ could make a significant impact for HIV treatment,” said Dr. Kim.


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About AIDS Clinical Trials Group (ACTG)
The AIDS Clinical Trials Group (ACTG), the largest HIV clinical trials organization in the world, plays a major role in setting standards of care for HIV infection and opportunistic diseases related to HIV/AIDS. The ACTG is composed of, and directed by, leading clinical scientists in HIV/AIDS therapeutic research. The ACTG is funded by the Department of Health and Human Services, National Institutes of Health (NIH) through the National Institute of Allergy and Infectious Diseases.


About VGX Pharmaceuticals
VGX Pharmaceuticals is a biopharmaceutical company with product candidates for the treatment of infectious diseases including HIV, hepatitis C as well as cancer and inflammatory diseases. The Company’s clinical development programs include PICTOVIR™ for HIV infection and VGX-410C for chronic hepatitis C virus infection. In addition, VGX Pharmaceuticals’ therapeutic platform is designed to advance a strong and continual pipeline of drug candidates into the clinic with novel product candidates to treat cancer and inflammatory diseases. The product candidates and technology programs are protected by the Company’s extensive global intellectual property portfolio. More information about VGX can be found at www.vgxp.com.

Company Contact:
Kevin W. Rassas
Vice President
Tel 267.440.4208
Fax 267.440.4242
E-mail: Rassas@vgxp.com
www.vgxp.com