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English Abstract
Journal Article
[Preparation and characterization of two novel functional monoclonal antibodies against human OX40L].
Xi Bao Yu Fen Zi Mian Yi Xue za Zhi = Chinese Journal of Cellular and Molecular Immunology 2007 August
AIM: To prepare novel anti-OX40L functional monoclonal antibodies and characterize their distinct biological functions.
METHODS: Routine immunization of BALB/c mice by a tansfected cell line L929/OX40L expressing high level of OX40L as antigens. Then fuse the immunized spleen with Sp2/0, a kind of myloma, and screen the positive clones by FCS with L929/OX40L as a positive control.After acquisition of the hybidomas secreting anti-OX40L mAb, investigation of their biological activities by Western blot, rapid isotyping analysis, karyotype analysis, competitive inhibition test, indirect immunofluorescence and MTT incorporation assay were followed.
RESULTS: Obtain two stable hybridomas, 4D6 and 5C2, which could continuously secret specific anti-OX40L monoclonal antibodies. The following biological activity studies showed that these monoclonal antibodies could both recognize the natural OX40L expressed on the mature DC, especially the OX40L on the several leukemia cell lines, such as Jurkat, SHI-1, U937 etc. Furthermore, they could also suppress the proliferation of SHI-1 in vitro.
CONCLUSION: Two hybridomas secreting anti-OX40L monoclonal antibodies continuously and steadily have been established. These monoclonal antibodies could specifically recognize human OX40L and effect the proliferation of leukemia cell line SHI-1 through OX40/OX40L costimulatory signals.
METHODS: Routine immunization of BALB/c mice by a tansfected cell line L929/OX40L expressing high level of OX40L as antigens. Then fuse the immunized spleen with Sp2/0, a kind of myloma, and screen the positive clones by FCS with L929/OX40L as a positive control.After acquisition of the hybidomas secreting anti-OX40L mAb, investigation of their biological activities by Western blot, rapid isotyping analysis, karyotype analysis, competitive inhibition test, indirect immunofluorescence and MTT incorporation assay were followed.
RESULTS: Obtain two stable hybridomas, 4D6 and 5C2, which could continuously secret specific anti-OX40L monoclonal antibodies. The following biological activity studies showed that these monoclonal antibodies could both recognize the natural OX40L expressed on the mature DC, especially the OX40L on the several leukemia cell lines, such as Jurkat, SHI-1, U937 etc. Furthermore, they could also suppress the proliferation of SHI-1 in vitro.
CONCLUSION: Two hybridomas secreting anti-OX40L monoclonal antibodies continuously and steadily have been established. These monoclonal antibodies could specifically recognize human OX40L and effect the proliferation of leukemia cell line SHI-1 through OX40/OX40L costimulatory signals.
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