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细胞分选
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== 操作 == #取组织: ##断颈处死小鼠,整体浸入含酒精的烧杯中灭菌3-5min; ##沿着腹部中线剪开取出脾脏,放入含PBS的6孔板中,转移至细胞房。 #研磨: ## 换用新的6孔板或50ml EP管(用于容纳筛网0.45μm) ## 加3mL的2%FBS-PBS,放入筛网和脾脏,用针筒芯研磨至无明显固体,转入灭菌EP管,离心2k rpm 3-5min,弃上清 ## 加入5 mL红细胞裂解液,吹打混匀,冰上裂解5min ## 离心2krpm 3-5min,弃上清,加入2%FBS-PBS重悬。若仍有红色cell沉积可重复裂解 #分选: ## 取20μL细胞悬液计数(单位:cell/mL) ## 按分选试剂盒要求比例加入分选试剂,分离目标细胞 ## 分选和未分选cell CD8抗体染色,流式,获得分选效率 #传代荧光及铺板(6孔板): ## 取20μL细胞悬液计数 ## 离心弃上清,用CFSE溶液(荧光染料)重悬细胞,静置2min ## 加入PBS终止染色,离心去上清 ## 按1-2×10⁶ cell/孔(6孔板)加入含抗体(刺激T cell增长)培养基 ## 显微镜确认细胞状态 #培养: ##37℃培养,显微镜观察。每24h观察一次cell状态,成功传代后应观察到成簇细胞。 #细胞流式 ##分选前后取细胞悬液加CD8+抗体,用于流式测定T cell占比(评估分选效率) ##CFSE染色前后取细胞悬液,用于流式测定CFSE信号(作传代对照) ##传代72h后,流式,观察传代结果,传代结果例图:<br/> [[File:CFSE荧光强度随细胞分裂递减.jpg|center|thumb|300px|CFSE荧光强度随细胞分裂递减]]
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