Polyanions inhibit murine macrophage Fc receptor mediated ADCC and binding.

Abstract:

:We examined the effect of various polyanions on mouse complement hemolytic activity, Fc receptor (FcR) subclass mediated antibody-dependent cellular cytotoxicity (ADCC) as well as binding by mouse peritoneal macrophages (M phi) of sheep erythrocyte targets. All the polyanions tested (dextran sulfate, carrageenan, polyvinyl sulfate, pentosan polysulfate and polyanethol sulfonic acid) inhibited the hemolytic activity of mouse serum complement to varying degrees. Polyanions inhibited ADCC mediated by either IgG2a or IgG2b in a reversible manner. FcR subclass mediated binding studies at 4 degrees C indicated that the various polyanions compete for FcR binding of sheep erythrocytes opsonized with murine IgG2a, IgG2b and polyclonal IgG. Polyanethol sulfonic acid was uniformly the most potent inhibitor of mouse CH50 and FcR dependent ADCC and binding functions, but did not affect C3b receptor mediated binding.

journal_name

Immunol Invest

authors

Mocharla R,Mocharla H,Leu RW

doi

10.3109/08820138909057755

subject

Has Abstract

pub_date

1989-06-01 00:00:00

pages

689-96

issue

5

eissn

0882-0139

issn

1532-4311

journal_volume

18

pub_type

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