Human immunodeficiency virus type 1 TAT protein induces adhesion molecule expression in astrocytes

Scott E. Woodman, Etty N. Benveniste, Avindra Nath, Joan W. Berman

Research output: Contribution to journalArticle

53 Citations (Scopus)

Abstract

AIDS encephalitis is a frequent consequence of CNS HIV infection, especially in children. One of its many characteristics is a leukocyte infiltrate that is believed to contribute to the production of cytokines, chemokines and neurotoxic factors resulting in CNS damage. Entry of such leukocytes into the CNS is mediated in part by the expression of adhesion molecules by blood-brain barrier (BBB) endothelial cells. Expression of these proteins by astrocytes, the other main component of the BBB, also serves to target leukocytes to the CNS parenchyma. We now demonstrate that HIV-1-derived Tat, a soluble protein secreted by infected cells, induced astrocyte VCAM-1 and ICAM-1 expression in a dose- and time-dependent manner. The functional role of Tat in monocyte binding in vitro was also demonstrated. These data suggest that the presence of extracellular Tat may be a significant factor in the trafficking of HIV-infected and inflammatory cells into the CNS via its effect on adhesion molecule expression by astrocytes.

Original languageEnglish (US)
Pages (from-to)678-684
Number of pages7
JournalJournal of NeuroVirology
Volume5
Issue number6
StatePublished - Dec 1999

Fingerprint

Astrocytes
HIV-1
Leukocytes
Blood-Brain Barrier
Proteins
Vascular Cell Adhesion Molecule-1
Encephalitis
Intercellular Adhesion Molecule-1
Chemokines
HIV Infections
Monocytes
Acquired Immunodeficiency Syndrome
Endothelial Cells
HIV
Cytokines
In Vitro Techniques

Keywords

  • Astrocytes
  • HIV-1
  • ICAM-1
  • Tat
  • VCAM-1

ASJC Scopus subject areas

  • Virology
  • Clinical Neurology

Cite this

Human immunodeficiency virus type 1 TAT protein induces adhesion molecule expression in astrocytes. / Woodman, Scott E.; Benveniste, Etty N.; Nath, Avindra; Berman, Joan W.

In: Journal of NeuroVirology, Vol. 5, No. 6, 12.1999, p. 678-684.

Research output: Contribution to journalArticle

Woodman, Scott E. ; Benveniste, Etty N. ; Nath, Avindra ; Berman, Joan W. / Human immunodeficiency virus type 1 TAT protein induces adhesion molecule expression in astrocytes. In: Journal of NeuroVirology. 1999 ; Vol. 5, No. 6. pp. 678-684.
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