Characterization of a monoclonal anti-Bw4 antibody (Tü109): evidence for similar epitopes on the Bw4 and Bw6 antigens.

Abstract:

:The production and serologic, as well as immunochemical properties of a cytotoxic murine IgG monoclonal antibody (Tü109) that precipitates HLA-class I molecules, are described. In the microcytotoxicity assay Tü109 supernatant was demonstrated on a panel of 424 HLA-ABC, -DR, -DQ, -MT typed normal Caucasian blood donors to define an epitope on HLA-B locus molecules in great association with the supertypic specificity Bw4. Reactivity of supernatant showed MHC linked inheritance of the Tü109 determinant and discriminated the HLA-Bw4/Bw6 associated HLA-B locus split antigens. Weak or lack of binding on lymphocytes from some HLA-Bw4 heterozygous individuals, particularly typing for HLA-Bw44, appeared to be due to qualitative and/or quantitative variations of HLA-B locus molecules on the cell surface. With Tü109 ascites fluid, however, extra-reactivity on all HLA-Bw6+ cells was demonstrated. Preferential binding of supernatant to HLA-Bw4, but reactivity of ascites fluid with HLA-Bw6+ molecules in addition, was furthermore confirmed by IEF analysis of antigens immunoprecipitated with Tü109 from cell lysates. Thus the antibody may help to analyze the evolutionary relationship of the diallelic specificities Bw4 and Bw6.

journal_name

Hum Immunol

journal_title

Human immunology

authors

Müller C,Herbst H,Uchanska-Ziegler B,Ziegler A,Schunter F,Steiert I,Muller C,Wernet P

doi

10.1016/0198-8859(85)90241-1

subject

Has Abstract

pub_date

1985-12-01 00:00:00

pages

333-49

issue

4

eissn

0198-8859

issn

1879-1166

pii

0198-8859(85)90241-1

journal_volume

14

pub_type

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