PMID: 6970174Jan 1, 1981Paper

Antigenic modulation of lymphocytic surface immunoglobulin yielding resistance to complement-mediated lysis. I. Characterization with syngeneic and xenogeneic complements

Immunology
J GordonG T Stevenson

Abstract

Following previous authors, the term antigenic modulation is used to describe the induction, by antibody, of resistance to lysis by antibody plus complement. A report is given of the rapid antigenic modulation in vitro of surface immunoglobulin (Ig) on guinea-pig L2C leukaemic lymphocytes: incubation of the cells for 2 min or longer at 37 degrees with anti-Ig diminished or removed completely the lysis occurring during subsequent incubation with anti-Ig plus complement. The modulation was effective for both xenogeneic (rabbit) and syngeneic (guinea-pig strain 2) complements, but more rapid for the latter. It appeared simply to require the action of antibody on a metabolically active cell: no requirement could be demonstrated for any serum component other than antibody, and there was a need to raise the temperature to 37 degrees after attachment of the antibody. There was molecular specificity inasmuch as modulation with anti-Ig failed to confer any resistance to lysis by another antibody (anti-Ia) plus complement.

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