On the species specificity of the interaction of LFA-1 with intercellular adhesion molecules

S. C. Johnston, M. L. Dustin, M. L. Hibbs, T. A. Springer

Research output: Contribution to journalArticleResearchpeer-review

91 Citations (Scopus)


Species restrictions in immune cell interactions have been demonstrated both in Ag-specific responses of T lymphocytes and the phenomenon of natural attachment. To determine the possible contribution of adhesion receptors to these restrictions, we have studied binding between the murine and human homologues of LFA-1 (CD11a/CD18) and ICAM employing purified human LFA-1 and ICAM-1 (CD54) bound to solid substrates. Murine cell lines bind to purified human LFA-1 through ICAM-1 and at least one other counter-receptor. This provides evidence for multiple counter-receptors for LFA-1 in the mouse as well as in the human. In contrast to binding of murine ICAM-1 to human LFA-1, murine LFA-1 does not bind to human ICAM-1. The species specificity maps to the LFA-1 α subunit, because mouse X human hybrid cells expressing the human α subunit associated with a mouse β subunit bind to human ICAM-1, whereas those with a human β subunit associated with a murine α subunit do not. Increased adhesiveness for ICAM-1 stimulated by phorbol esters could be demonstrated for hybrid LFA-1 molecules with human α and murine β subunits.

Original languageEnglish
Pages (from-to)1181-1187
Number of pages7
JournalJournal of Immunology
Issue number4
Publication statusPublished - 1 Jan 1990

Cite this