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The effect of the removal of sialic acid, galactose and total carbohydrate on the functional activity of Campath-1H.

Abstract：

:A monoclonal human IgG1, Campath-1H, was digested with glycosidases to assess the effect of carbohydrate on the functional activities of an IgG1. Removal of the complete carbohydrate moiety abolished complement lysis activity and antibody-dependent cell-mediated cytotoxicity, but left antigen binding activity and protein A binding activity intact. Removal of terminal sialic acid residues through glycopeptidase F digestion was not found to affect any of the tested IgG activities. Removal of the majority of the galactose residues from desialylated Campath-1H was found to reduce but not abolish complement lysis activity. Other activities were not affected by degalactosylation. This indicates a rare separation of complement lysis activity and antibody-dependent cell-mediated cytotoxicity of IgG in the way they behave under controlled conditions. This paper underlines the overall importance of carbohydrate in IgG function and stresses the relative contributions of some of the carbohydrate residues.

journal_name

Mol Immunol

journal_title

Molecular immunology

authors

Boyd PN,Lines AC,Patel AK

doi

10.1016/0161-5890(95)00118-2

subject

Has Abstract

pub_date

1995-12-01 00:00:00

pages

1311-8

issue

17-18

eissn

0161-5890

issn

1872-9142

journal_volume

32

pub_type

杂志文章

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