摘要
Human T lymphocytes were found to be highly radiosensitive and complex cellular responses including apoptosis could be induced upon exposure to X-ray irradiation. However, the mechanism of apoptosis associated with irradiation was not clear. In this study, a proteomic method was applied to investigation on alteration of proteome of human T-lymphocyte cells after irradiation. The Jurkat cells were irradiated with 4 Gy X-ray and the cell lysates were collected at different times after irradiation （6, 12, 18, 24 and 48 h）. The whole proteins were separated and quantified by two-dimensional fluorescence difference gel electrophoresis, and then the differentially expressed proteins were identified by mass spectrometry. 4 proteins exhibited significant irradiation-induced difference in abundance, including L-plastin, bifunctional purine biosynthesis protein, tubulin beta chain, beta-actin. Differentially expressed proteins were reported to be directly or indirectly involved in the function of human T lymphocyte. Thus, this study might provide clues to identify proteins with biological significance related to irradiation.
Human T lymphocytes were found to be highly radiosensitive and complex cellular responses including apoptosis could be induced upon exposure to X-ray irradiation. However, the mechanism of apoptosis associated with irradiation was not clear. In this study, a proteomic method was applied to investigation on alteration of proteome of human T-lymphocyte cells after irradiation. The Jurkat cells were irradiated with 4 Gy X-ray and the cell lysates were collected at different times after irradiation （6, 12, 18, 24 and 48 h）. The whole proteins were separated and quantified by two-dimensional fluorescence difference gel electrophoresis, and then the differentially expressed proteins were identified by mass spectrometry. 4 proteins exhibited significant irradiation-induced difference in abundance, including L-plastin, bifunctional purine biosynthesis protein, tubulin beta chain, beta-actin. Differentially expressed proteins were reported to be directly or indirectly involved in the function of human T lymphocyte. Thus, this study might provide clues to identify proteins with biological significance related to irradiation.
基金
Project supported by the National Natural Science Foundation of China （Nos. 20675079, 30672600）.
