Class I MHC-restricted T-T hybridomas, and a CD8-transfected BW5

Chemistry: molecular biology and microbiology – Spore forming or isolating process

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435 724, 435 29, 435 691, 4351722, C12N 516

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active

053488784

ABSTRACT:
The present invention provides class I MHC-restricted T-T hybridomas, a novel T-T fusion partner therefor and an assay system that allows for the generation and detection of functional, class I MHC restricted T-T hybridomas. The fusion partner comprises a murine BW5147 cell line that has been transfected with a CD8 gene and stably expresses the CD8 gene product. The BW5147 transfectants are used to generate functional, class I MHC restricted T-T hybridomas which are permissive for lymphokine production. Functional class I MHC-restricted T-T hybridomas exhibiting the capability of producing lymphokines are prepared by fusing BW5147 cells expressing CD8 with T lymphocytes activated in a mixed leukocyte reaction (alloreactive T cells) or stimulated with antigen (antigen-stimulated T lymphocytes) and screening the resulting hybrids for the ability to produce lymphokines in response to appropriate antigenic stimulation. Responsiveness of these clones to alloantigen or to antigen-MHC I complexes can be tested by measuring their production of lymphokines, which provides a sensitive and quantitative assay system.

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