HealthDay News — According to a report published in Nature, animal research with an experimental 2-drug therapy could hold clues for creating long-term HIV remission.
The 2-year study involved 36 monkeys infected with simian immunodeficiency virus (SIV).
The monkeys initially were treated with antiretroviral drugs for 6 months. Then they were treated with different combinations of experimental vaccines and immune stimulants.
Researchers gave 9 monkeys the combination of Ad26/MVA and GS-986. Then they stopped the antiretroviral drugs to see whether the different therapies would keep the SIV level in the monkey’s blood under control.
The combo worked best at keeping SIV levels down, researchers found. All 9 monkeys showed decreased levels and the virus was undetectable in a third of them.
“They rebounded initially, but after rebounding, the virus was controlled,” senior author Dan Barouch, MD, PhD, director of the Center for Virology and Vaccine Research at the Beth Israel Deaconess Medical Center in Boston, told HealthDay. “They have remained undetectable up until the last time they were tested.”
“Both of these components already are in clinical trials being conducted separately,” Barouch added. “We hope to evaluate the combination in humans and we plan to do further animal studies as well.”
The study was funded by Janssen Vaccines & Prevention and Gilead Sciences, the manufacturers of Ad26/MVA and GS-986, respectively.
Borducchi EN, et al. “Ad26/MVA Therapeutic Vaccination With TLR7 Stimulation In SIV-Infected Rhesus Monkeys”. Nature. 2016. doi:10.1038/nature20583. [Epub ahead of print]