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K562 cells induces apoptosis of activated NK cells in vitro
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- Author:
- No author available
- Journal Title:
- Journal of Southern Medical University
- Issue:
- 9
- DOI:
- 10.3969/j.issn.1673-4254.2012.09.006
- Key Word:
- NK细胞;细胞凋亡;免疫逃逸;白血病
Abstract： 目的 探讨红白血病细胞系K562对自然杀伤细胞(NK cells)诱导凋亡的作用.方法 利用MACS免疫磁珠阴性分选纯化健康志愿者外周血NK细胞,用重组人白介素-2(rhIL-2)和干细胞培养液培养、观察NK细胞.把NK细胞与人红白血病细胞系K562按不同效靶比例和作用时间混合培养,用PE-AnnexinV/7-AAD凋亡试剂盒检测这两种细胞各自的凋亡情况.结果 免疫磁珠分选后NK细胞纯度为(93.99±4.22)％;K562细胞诱导NK细胞凋亡作用时,在相同效靶比情况下,随着共培养时间的延长,NK细胞凋亡率显著增高；在相同培养时间的情况下,随着效靶比降低,NK细胞凋亡率逐渐升高,杀伤活性逐渐减低.结论 红白血病细胞系K562可以诱导活化的NK细胞凋亡,这有可能是肿瘤细胞发生免疫逃逸的机制之一.
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