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作 者:吕秋萍[1] 凌斌[2] 许恬怡[2] 姚凤球[2] 周颖[2] 魏海明[3] 田志刚[3]
机构地区:[1]安徽医科大学附属省立医院,安徽省立医院耳鼻咽喉-头颈外科 [2]安徽医科大学附属省立医院,安徽省立医院安徽省分子医学重点实验室,合肥230001 [3]中国科学技术大学免疫学研究所
出 处:《中国临床保健杂志》2006年第2期99-102,共4页Chinese Journal of Clinical Healthcare
基 金:国家863计划资助课题(2002AA216151)
摘 要:目的研究NK-92细胞对人鼻咽癌细胞的体外杀伤活性,以及放射线照射后对其杀伤活性的影响。方法应用4h^51Cr释放法检测不同效靶比情况下体外培养的NK-92细胞对人鼻咽癌细胞CNE的杀伤活性,以K562细胞株作为对照。应用医用电子直线加速器对NK-92细胞进行照射处理(0、400cGy)后,检测其杀伤活性的变化。结果NK-92细胞0cGy照射组,效靶比较低时(1:1、5:1)对CNE细胞杀伤率为11%~24%,随效靶比升高,杀伤率随之上升,10:1时杀伤率为36%,20:1时杀伤率为42%;对于K562细胞,杀伤率为35%~70%。400cGy组照射后2d,NK-92细胞对CNE细胞不同效靶比的杀伤率与0cGy组相比稍有降低,其杀伤率为8%~38%,对K562细胞杀伤范围在31%~62%。结论在合适的效靶比情况下,NK-92细胞对人鼻咽癌细胞CNE具有杀伤作用。经放射线照射后对CNE细胞仍具有一定的杀伤活性。Objective To study cytotoxic activity of NK-92 cells against human nasopharyngeal carcinoma cells and effect of irradiation on NK 92 cytotoxicity in vitro. Methods NK-92 cells were mixed with sl Cr-labeled CNE or K562 cells at different effector-to-target ratios for a 4 h^51Cr-release assay. On the other hand , NK-92 cells were irradiated at 0 and 400 cGy and tested after two days for cytotoxicity against K562 and CNE cells, Results NK-92 cells displayed cytotoxicity against CNE with a mean specific lysis of 36% and 42% at 10 : 1 and 20 : 1 E:T ratios in vitro, while these levels at 1 : 1 (11%) and 5 : 1 (24 %) E:T ratios were lower ; The cytotoxicity of NK-92 against K562 ranged from 35 % to ?0 %. NK-92 cells maintained up to 8 % -38 % cytotoxicity against CNE and 31% -62 % cytotoxicity against K562 when irradiated with 400 cGy after two days. Conclusion In vitro NK-92 ceils have cytotoxic activity against CNE cells at suitable E: T ratios, and substantial cytotoxicity can be retained up to irradiation dose of 400cGy.
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