Role of T Lymphocytes in HIV Neuropathogenesis

Area of Science:

• Neuroimmunology
• Virology
• Immunology

Background:

• Human immunodeficiency virus (HIV) frequently targets the central nervous system (CNS) early in infection.
• Neurological impairments persist in HIV-infected individuals despite antiretroviral therapy (ART).
• CD4+ T cells and monocytes facilitate HIV entry into the brain, contributing to viral persistence and neuronal damage.

Purpose of the Study:

• To review the role of CD4+ T lymphocytes in HIV's assault and persistence within the CNS.
• To summarize the mechanisms of HIV-infected CNS resident cell elimination by CD8+ T lymphocytes.

Main Methods:

• Literature review of current knowledge on T cell involvement in HIV CNS infection.
• Analysis of the dual role of CD8+ T cells in HIV neuropathogenesis.

Main Results:

• CD4+ T cells are crucial for initiating and maintaining HIV infection in the CNS.
• CD8+ T cells are recruited to the CNS to control viral replication but struggle to eliminate infected cells.
• The precise role of CD8+ T cells in HIV neuropathogenesis remains complex, potentially involving both beneficial clearance and detrimental inflammation.

Conclusions:

• Understanding T cell dynamics in the CNS is critical for addressing HIV-related neurological complications.
• Further research is needed to fully elucidate the beneficial and detrimental roles of CD8+ T cells in HIV CNS disease.