Autoantibodies Against the Inner Aspect of Erythrocyte Membranes in NZB Mice

Overview

Journal Clin Exp Immunol

Publisher Oxford University Press

Specialty Allergy & Immunology

Date 1977 Mar 1

PMID 862240

Authors

E Linder

Affiliations

Soon will be listed here.

Abstract

Erythrocyte autoantibodies in NZB mice react by hemagglutination methods with exposed and hidden red cell antigens. The hidden antigens can be exposed by treatment with proteolytic enzymes. By indirect immunofluorescence one antibody population can be shown to react with modified red cells. In the present study the location of the corresponding autoantigen within the membrane was studied. Mechanical or hypotonic lysis of the red cells exposed the antigen. Proteolytic digestion known to expose other erythrocyte autoantigens had no effect. The autoantigen was exposed on 'inside out' erythrocyte membrane vesicles, but not on 'right-side out' vesicles, prepared from isolated erythrocyte ghosts. Frezzing and thawing as well as mechanical disintergration of red cells liberated antigenically active material as saline-insuluble fibrillar material. The observations indicate that the autoantigen studied is located at the inner aspect of the erythrocyte membrane and suggest that it is associated with fibril-forming structural components. The observed reactivity distinguishes the described antibodies from previously identified erythrocyte autoantibodies.

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