Ikeda Y, Sugiyama T, Takahashi M, Taniguchi N. Selective suppression of IgG2a subclass in LEC rats during development.
BIOCHIMICA ET BIOPHYSICA ACTA 1994;
1200:277-80. [PMID:
8068713 DOI:
10.1016/0304-4165(94)90168-6]
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Abstract
The LEC rat is a mutant strain that has been established as a model of hepatitis and hepatoma. In addition to hepatic disorders, it has been found that this strain has a defect in T cell maturation, and has low levels of serum IgG. Sodium dodecylsulfate polyacrylamide gel electrophoresis (SDS-PAGE) and immunoblot analysis showed that low levels of serum IgG were largely due to reduction of the IgG2a subclass. Quantitative determination of IgG subclasses by enzyme-linked immunosorbent assay (ELISA) using subclass-specific antibodies indicated that IgG2b and IgG2c subclasses were increased during development in this strain, whereas the IgG2a subclass was markedly decreased. These results suggest that dysfunction of some helper T cells in LEC rats selectively suppress synthesis of the IgG2a subclass during development but not affect production of IgG2b and IgG2c.
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