HIV drug could treat Alzheimer’s, age-associated disorders
by: BROWN UNIVERSITY
Lamivudine, a generic HIV/AIDS medication significantly reduces age-related inflammation in old mice by halting retrotransposon activity. Two weeks of treatment reduced the signs of chronic inflammation — white blood cells stained pink amongst green fat cells — in old mouse fat tissue.
CREDIT: SEDIVY LAB/BROWN UNIVERSITY
PROVIDENCE, R.I. [Brown University] — A new study found that an HIV drug significantly reduces age-related inflammation and other signs of aging in mice.
“This holds promise for treating age-associated disorders including Alzheimer’s,” said John Sedivy, professor of medical science and biology at Brown University. “And not just Alzheimer’s but many other diseases: Type 2 diabetes, Parkinson’s, macular degeneration, arthritis, all of these different things. That’s our goal.” Age-related inflammation is an important component of age-associated disorders.
The findings were published on Thursday, Feb. 7, in the journal Nature. The collaborative research project included researchers at Brown, New York University, the University of Rochester, Université de Montréal and the University of Virginia School of Medicine.
According to Sedivy, the HIV drug acts by halting retrotransposon activity in old cells. Retrotransposons — DNA sequences able to replicate and move to other places — make up a substantial fraction of the human genome. Retrotransposons are related to ancient retroviruses that, when left unchecked, can produce DNA copies of themselves that can insert in other parts of a cell’s genome. Cells have evolved ways to keep these “jumping genes” under wraps, but as the cells age, the retrotransposons can escape this control, earlier research from Sedivy’s lab showed.
In the Nature paper, the research team showed that an important class of retrotransposons, called L1, escaped from cellular control and began to replicate in both senescent human cells — old cells that no longer divide — and old mice. Retrotransposon replication, specifically the DNA copies of L1, is detected by an antiviral immune response, called the interferon response, and ultimately triggers inflammation in neighboring cells, the researchers found….
Source: Eurek Alert
Image: CREDIT: SEDIVY LAB/BROWN UNIVERSITY