Multiple antigen recognition by individual human monoclonal antibodies of rheumatic disease patient origin.

Abstract:

:We tested by Western blot several thousand antibody-secreting human cell lines immortalized by hybridoma fusion or Epstein-Barr virus transformation of peripheral blood lymphocytes from patients with systemic lupus erythematosus or mixed connective tissue disease. The blots utilized total human Jurkat cell extract as the antigen. More than 20% of these established lines produced antibodies which recognized multiple bands on the blots, frequently 50 bands or more. Experiments were performed to rule out the possibility of the bands being the result of mixed cell populations or nonspecific antibody-antigen binding. Cloning of these cell lines failed to alter the Western blot patterns produced, indicating that the populations were monoclonal. Antibody eluted from a number of the different single blot bands showed the same ability to reproduce the multiple band pattern, thus revealing the presence of only one antibody. Western blots performed in the presence of specific and nonspecific inhibitors demonstrated the ability of the antibody to specifically recognize and bind to certain antigens. Binding did not result from indiscriminate sticking of IgM molecules to the nitrocellulose paper. The patterns of multiple antigen recognition were not due to antigen degradation. Additionally, enzyme linked immunosorbant assays revealed binding of the monoclonal antibodies to specific antigens, and the antibodies failed to recognize commonly crossreactive antigens such as DNA, histone, poly-L-lysine, glycophorin, and serum glycoproteins. The patterns of multiple antigen binding to a large number of polypeptides are therefore due to single antibodies, and the binding is specific.

journal_name

Immunol Invest

authors

Vanderslice WE,Takeda Y,Chen J,Sharp GC,Pettersson I,Rosen A,Wigzell H,Wang RJ

doi

10.3109/08820138809041420

subject

Has Abstract

pub_date

1988-06-01 00:00:00

pages

321-35

issue

4

eissn

0882-0139

issn

1532-4311

journal_volume

17

pub_type

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