The presence of autoantibodies specific for NZB serum factors in adult NZB mice and the establishment of monoclonal autoantibodies against these humoral factors.
Cell Immunol
; 113(1): 158-74, 1988 Apr 15.
Article
em En
| MEDLINE
| ID: mdl-3284656
ABSTRACT
Humoral factors in serum of young NZB mice enhance maturation of B-lymphocyte precursors in vitro. A blot ELISA assay identified autoantibodies against the serum factors. NZB-SFs (designated NZB-SF alpha, pI 3.5-4.0, and NZB-SF beta, pI 7.8) were purified by sequential steps. Both had a molecular weight (MW) of approximately 23,000 in SDS-PAGE. NZB mice develop autoantibodies against NZB-SFs by 2 months of age; titers increased progressively with age. Non-autoimmune-prone mice did not produce autoantibodies against NZB-SFs. We then developed two hybridoma clones, IIC1C1 and IIC1M4, which produce monoclonal autoantibodies against NZB-SF alpha and NZB-SF beta, respectively. Both IgM autoantibodies could be affinity purified with a column of CNBr-Sepharose 4B gel conjugated with anti-mouse IgM antibody. Neither IIC1C1 nor IIC1M4 abolished bioactivity of recombinant mouse IL-1 alpha, human IL-1, mouse, rat, or human IL-2, mouse IL-3, or colony-stimulating factor. Neither antibody reacted to recombinant mouse IL-1 alpha, IL-4, TNF alpha, or IFN gamma in blot ELISA assays. Monoclonal autoantibodies IIC1C1 and IIC1M4 were used to purify NZB-SFs. SDS-PAGE of the affinity-purified NZB-SFs revealed bands of 23 and 60 kDa, and proteins extracted from the bands were reactive to our monoclonal autoantibodies.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Autoanticorpos
/
Linfocinas
/
Camundongos Endogâmicos NZB
/
Anticorpos Monoclonais
/
Especificidade de Anticorpos
Tipo de estudo:
Prognostic_studies
Limite:
Animals
Idioma:
En
Revista:
Cell Immunol
Ano de publicação:
1988
Tipo de documento:
Article