Neuropathogenesis of Retroviral Infections

$3,580,058ZIAFY2011NSNIH

National Institute Of Neurological Disorders And Stroke

Investigators

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Abstract

We have shown that astrocytes in the brain are an important reservoir for HIV and that cell to cell contact with lymphocytes is necessary for viral entry and the lysosomal pathway in these cells regulates the intracellular trafficking of the virus and its ultimate ability to successfully infect these cells. Further, we have shown that the HIV protein Tat and the env protein of endogenous retrovirus-K are neurotoxic and we are now the underlying mechanisms involved in these effects. Finally, we have also discovered that the Tat protein of HIV can stimulate T cells in a T cell receptor independent manner using a unique mechanism. These activated T cells cause neuronal injury via the release of granzyme B that acts on cell receptors causing a cascade of events leading to neuronal dysfunction.

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