Induction of monocyte chemoattractant protein-1 in HIV-1 Tat-stimulated astrocytes and elevation in AIDS dementia

Katherine Conant, Alfredo Garzino-Demo, Avindra Nath, Justin C. Mcarthur, William Halliday, Christopher Power, Robert C. Gallo, Eugene O. Major

Research output: Contribution to journalArticlepeer-review

493 Scopus citations


Activated monocytes release a number of substances, including inflammatory cytokines and eicosanoids, that are highly toxic to cells of the central nervous system. Because monocytic infiltration of the central nervous system closely correlates with HIV-1-associated dementia, it has been suggested that monocyte-derived toxins mediate nervous system damage. In the present study, we show that the HIV-1 transactivator protein Tat significantly increases astrocytic expression and release of monocyte chemoattractant protein-1 (MCP-1). Astrocytic release of β-chemokines, which are relatively less selective for monocytes, including RANTES, macrophage inflammatory protein-1α, and macrophage inflammatory protein-1β, was not observed. We also show that MCP-1 is expressed in the brains of patients with HIV-1-associated dementia and that of the β-chemokines tested, only MCP-1 could be detected in the cerebrospinal fluid of patients with this condition. Together, these data provide a potential link between the presence of HIV-1 in the brain and the monocytic infiltration that may substantially contribute to dementia.

Original languageEnglish (US)
Pages (from-to)3117-3121
Number of pages5
JournalProceedings of the National Academy of Sciences of the United States of America
Issue number6
StatePublished - Mar 17 1998


  • Central nervous system
  • Chemotaxis

ASJC Scopus subject areas

  • General


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