Inhibition of human immunodeficiency virus infection in monocytes by monoclonal antibodies against leukocyte adhesion molecules

D. Chester Kalter, Howard E. Gendelman, Monte S. Meltzer

Research output: Contribution to journalArticle

30 Scopus citations


CD4 is the surface receptor for HIV envelope. Some evidence exists, however, that other cell surface receptors may be involved in viral entry subsequent to the initial binding of gp120 to CD4. Antibodies to leukocyte integrin LFA-1, a major component of intercellular adhesive interactions, have been shown to inhibit HIV-induced syncytia formation. Using a stringent system for in vitro HIV infection of human leukocytes, we examine the ability of some monoclonal antibodies (mAb) against various adhesion-related molecules to block or partially inhibit productive viral replication. HIV-1 infection of target monocytes or T cells by cell-free virus was blocked completely or partially by some mAb that prevent cell-cell interactions (CD4, HLA-DR, LFA-1, LFA-3), but not by others (ICAM-1, MAC-1, gp150.95, CD2, CD3, CD14). The capacity for mAb to block HIV infection appears to be epitope-specific, and does not relate to the ability to block homotypic adhesion. HIV transmission from infected cells was more difficult to block than was infection by cell-free virus. Adhesion molecules may be involved in facilitating early stages of HIV infection, following gp120/CD4 binding but prior to viral integration, in a manner distinct from cell-cell adhesion.

Original languageEnglish (US)
Pages (from-to)219-227
Number of pages9
JournalImmunology Letters
Issue number2
Publication statusPublished - Oct 1991



  • HIV
  • Inhibition of infection
  • Leukocyte adhesion molecule
  • Monocyte

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

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