PF18-3, a 35-ku molecule, expresses specifically on apoptotic subset of mouse thymocytes |
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Authors: | Hong Wang Yan Li Xuewen Pang Weifeng Chen |
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Institution: | (1) Key Laboratory of Medical Immunology, Ministry of Health, and Department of Immunology, Beijing Medical University, 100083 Beijing, China |
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Abstract: | PF18-3 monoclonal antibody (mAb), one of the rat mAbs against mouse thymic stromal cells (MTSC), has been found to inhibit
thymocyte apoptosis induced by a mouse thymic dendritic cell line, MTSC4, in previous co-culture study. The aim of this research
is to investigate the character of PF18-3 rnAb recognized molecule (PF18-3 molecule) and its role in MTSC4-induced thymocyte
apoptosis. The characterization of PF18-3 molecule expression has been conducted by FACS analysis. PF18-3 molecules have been
found to express on MTSC4 as well as on Con A activated but not freshly isolated thyrnocytes. Up-regulated expression of PF18-3
molecules has been also observed on thymocytes after being co-cultured with MTSC4 for 48 h. The results from FACS analyses
by PI staining for detecting apoptosis-related hypodiploid and by PF18-3 rnAb staining reveal that PF18-3 molecules expresss
specifically on the apoptotic subgroup of thymocytes with high hypodiploid content. The PF18-3 molecule expressed on apoptotic
thymocytes with 35 ku of molecular weight, identified by immunoprecipitation and western blotting, is thus likely to be a
molecule involved in thymocyte apoptosis. |
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Keywords: | thymocytes cell apoptosis monoclonal antibody mediator |
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