【摘要】 目的137Csγ射线对白膜不同成分的影响。方法MTT法测辐照前后淋巴细胞的增殖情况;用荧光素FITC标记DH5α细菌,FCM分析粒细胞荧光强度的变化;用细胞色素C还原法检测中性粒细胞O2-的生成以及用ELISA法测单核细胞辐照前后细胞因子的分泌情况。结果25 Gy能完全灭活T细胞;辐照后粒细胞离体12h后有明显凋亡出现,但辐照前后粒细胞吞噬DH5α的能力无明显改变;而粒细胞释放的O2-在辐照后有明显升高;单核细胞经辐照后仍能分泌细胞因子,且IFN-γ的分泌量较未照组有所下降,而TNF-α的分泌量随着时间的推移呈逐渐升高趋势。结论γ射线对白膜中各成分都有不同程度的影响。分离后的粒细胞应尽早输注,由细胞因子参与的临床输血问题以及由此带来的风险,应当引起关注。更多还原

【Abstract】 Objective To investigate the changes of buffy coat components after 25Gy 137Cs-irradiation.Methods Lymphocyte proliferation was detected by MTT,the fluorescent intensity of neutrophils was measured as phagocytotic rate by flow cytometry,O2-release was determined by cytochrome C reduction,and cytokine production pre-and post-irradiation was detected by ELISA.Results 25Gy is adequate to inactivate T cells.The percentages of phagocytosis of E.coli before and after irradiation were of no significant difference.The release of O2-increased significantly and monocytes maintained the ability to produce cytokines after irradiation.Conclusion Radiation does affect the components of buffy coat,and neutrophils isolated should be transfused as early as possible.更多还原