The award marks the third round of funding for Williams' research into monocyte and macrophage cells, which play important roles as part of the body's immunological response. Williams and his research team have linked the activity of these cells to the presence of debilitating conditions like dementia, cardiovascular disease and nerve damage that strike patients living with HIV or AIDS even though they have effectively muted the virus with drug therapies.
"Even though drug regimens can control HIV to the point where the virus is almost undetectable in people living with HIV, our lab has shown specific cells and cellular activity are the telltale signs of other lethal diseases that strike these patients as well as indicators of viral reservoirs with the power to revive the virus," said Williams. "With the support of the NIH, we are now pursuing advances that could lead to new therapies able to control the virus and its debilitating effects."
The latest grant will support the Williams lab's efforts to define the cell types in the brain that contribute to an HIV viral reservoir, which effectively harbors the virus even if it is almost undetectable in patients taking anti-retroviral therapy (ART) drugs. While patients on ART show few to none of the detectable signs of the illness, the virus rebounds when the patients are taken off ARTs. These patients also experience chronic immune activation of monocytes and macrophages, both of which the lab has identified as cell types from which the virus returns.
Williams said the latest round of funding will support work to define cell types in the blood and the brain that serve as viral reservoirs and reveal how these viral stores are established and maintained in the brain.
The team will use traditional ART drugs and a new orally administered form of a drug that specifically targets infected monocytes and macrophages. It would be the first time researchers have paired another drug with traditional ART in an effort to target the macrophage reservoir of HIV.
In addition, the Williams research team will use the twin therapeutics to target viral cells that attempt to migrate from the brain and back into the body, where they can serve as a source of virus that can re-seed the body.
Earlier research by the lab has effectively marked a special population of brain macrophages and allowed researchers to track these cells as they travel via the lymphatic system through cranial nerves and sinuses. Williams and colleagues at the University of California San Francisco hope to show the new drug and ART can stop the brain-to-body migration of the virus in patients with HIV.
Provided by Boston College
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