02:56am Sunday 07 June 2020

Finding the link between HIV and dementia

Dr Lachlan Gray (photo: Hazel Squair)

Dr Lachlan Gray Photo: Hazel Squair

The discovery, lead by Dr Lachlan Gray from the Department of Biochemistry and Molecular Biology, is an important step in understanding the link between HIV infection and HIV dementia, and is important for the eradication of HIV in general.

“The persistence of the virus in the brain compromises the brain’s normal function, and leads to the death of neurons and to clinical dementia,” Dr Gray said.

In fact, about one in five of those infected by HIV ends up with dementia.

“We believe our findings will aid the development of novel drugs that will prevent HIV using the brain as a sanctuary, and help shape future eradication strategies,” Dr Gray said.

Dr Gray’s work was presented at Fresh Science, a communication boot camp sponsored by the Australian Government for early career scientists recently held at the Melbourne Museum. He was one of 16 winners from around Australia to present.

Dr Gray has been examining the life cycle of the virus to understand better how it survives within the brain.

“We’ve identified changes in the way the virus reproduces, which allows it to keep a low profile and persist undetected in the brain,” Dr Gray said.

At present, people living with HIV must rely on the continued use of antiviral drugs to control their infection.

“Viral persistence is a major barrier to the cure of AIDS. Modern drugs are very good at controlling the virus, but they are unable to eradicate it from ‘sanctuary’ sites like the brain,” Dr Gray’s supervisor, Adjunct Associate Professor Melissa Churchill said.

“Unfortunately, brain infection often leads to dementia which can be very debilitating. Somewhat more concerning, HIV is now the commonest cause of dementia in people under the age of 40, and is placing an extra burden on our mental health services.”

Dr Gray’s research is part of a larger project aiming to trial new drugs that could potentially eradicate or even cure HIV.

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