重型再生障碍性贫血患者自然杀伤细胞体外杀伤功能研究  被引量:3

In vitro functions of natural killer cells in peripheral blood of patients with severe aplastic anemia

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作  者:丁少雪[1] 付蓉[1] 张江勃 李丽娟[1] 刘惠[1] 刘春燕[1] 王红蕾[1] 张田[1] 丁凯[1] 瞿文[1] 阮二宝[1] 王国锦[1] 宋嘉[1] 王化泉[1] 王晓明[1] 关晶[1] 刘鸿[1] 吴玉红[1] 邵宗鸿[1] 

机构地区:[1]天津医科大学总医院血液内科,300052

出  处:《中华医学杂志》2014年第48期3845-3847,共3页National Medical Journal of China

基  金:国家自然科学基金(81370607、81170472、81400085、81400088);卫生行业科研专项项目(201202017);天津市自然科学基金(14JCYBJC25400、14JCYBJC27200);天津市自然科学基金重点项目(12JCZDJC21500);天津市抗癌重大专项攻关计划(12ZCDZSY18000、12ZCDZSY17900);天津市卫生行业重点攻关项目(11KG135)

摘  要:目的 检测重型再生障碍性贫血(SAA)患者外周血自然杀伤(NK)细胞体外对慢性髓细胞白血病细胞株(K562细胞)的杀伤活性,探讨NK细胞在SAA免疫发病机制中的作用.方法 应用免疫磁珠分选法(MACS)分选2013年6月至2014年8月天津医科大学总医院血液科收治的12例SAA患者(SAA组)及10名健康人(健康对照组)外周血NK细胞(CD3-CD56+ CD16+)作为效应细胞,以K562细胞作为靶细胞,按照不同的效靶细胞比(1∶1、5∶1、10∶1)混合培养,培养后应用膜联蛋白V (Annexin-V)和碘化丙啶(PI)双标法标记细胞,流式细胞术检测K562细胞的凋亡率,并对两组结果进行比较.结果 健康人与SAA患者外周血NK细胞分别与K562细胞以相同效靶比(1∶1)培养,SAA组K562细胞凋亡率(10.30%±6.08%)高于健康对照组(6.30%±3.46%),两者比较差异有统计学意义(P<0.05);SAA患者NK细胞分别与K562细胞以不同效靶比(1∶1、5∶1、10∶1)共培养后,K562细胞凋亡率分别为(10.30%±6.08%、16.47%±8.29%、25.45%±9.88%),效靶比越高,K562细胞凋亡比例越高,各组比较差异有统计学意义(P<0.05).结论 SAA患者外周血NK细胞体外杀伤功能增强,可能在SAA免疫耐受机制异常中发挥了重要作用.Objective To observe the in vitro killing functions of natural killer (NK) cells for K562 cells in peripheral blood of severe aplastic anemia (SAA) patients and explore the role of NK cells in the immunological pathogenesis of SAA.Methods NK cells (CD3-CD56 + CD16 +) as effector cells were sorted from peripheral blood mononuclear cells (PBMNC) of 12 SAA patients and 10 normal controls by magnetic activated cell sorting system (MACS)from June 2013 to August 2014.K562 cells as target cells were co-cultured with the effector cells (1 ∶ 1,1 ∶ 5,1 ∶ 10).Using Annexin V and PI double staining markers,the apoptotic rate of K562 ceils were measured by flow cytometry after culturing.Results The apoptotic rate of K562 cells in SAA patients was (10.30% ± 6.08%) according to the ratio of effector-target (1 ∶ 1).And it was significantly higher than that in normal controls (6.30% ± 3.46%) (P < 0.05).The apoptotic rate of K562 cells in SAA patients were 10.30% ± 6.08%,16.47% ± 8.29% and 25.45% ± 9.88% respectively according to the ratio of effector-target(1∶ 1,5∶ 1,10∶1).The higher ratio of effectortarget,the higher apoptotic rate of K562 cells.There were statistic differences among three groups (P < 0.05).Conclusion There are enhanced in vitro functions of NK cells in peripheral blood of SAA patients NK cells may play an important role in abnormal immune tolerance mechanisms of SAA patients.

关 键 词:贫血 再生障碍性 自然杀伤T细胞 K562细胞 

分 类 号:R556.5[医药卫生—血液循环系统疾病]

 

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