低能量He-Ne激光血管内照射对脑梗死患者淋巴细胞的影响

Effects of low energy intravenous He-Ne laser irradiation of blood on lymphocytes in patients with cerebral infarction

目的 探讨He Ne激光血管内照射 (ILIB)对脑梗死患者淋巴细胞增殖和凋亡的影响 ,以及有否遗传毒性。方法 对ILIB治疗前、后的脑梗死患者外周血进行淋巴细胞培养 ,并进行细胞增殖指数(MI)、细胞周期动力学指数 (CKI)、姐妹染色单体交换 (SCE)频率和细胞凋亡的分析 ,观察ILIB对淋巴细胞的效应。结果 经ILIB照射后 ,脑梗死患者的淋巴细胞增殖活性比对照组和照射前有所提高 ,并且随着照射剂量的增加 ,其增殖活性也增高 (P <0 .0 5 ,P <0 .0 0 1) ,但对淋巴细胞周期的进程影响不是很大 ,ILIB治疗前、后的CKI与对照组相比 ,差异无显著性意义 (P >0 .0 5 ) ;各组间的SCE频率差异不显著 (P >0 .0 5 ) ;流式细胞仪 (FCM )检测后显示 ,经ILIB照射后的脑梗死患者的细胞凋亡率比照射前和对照组均有极显著增高(P <0 .0 0 1)。结论 低能量He Ne激光血管内照射能提高脑梗死患者的淋巴细胞增殖活性 ,虽可诱发较高的淋巴细胞凋亡率 ,但对细胞没有致突变性。

Objective To explore the effects of low energy intravenous He-Ne laser irradiation of blood (ILIB) on cell proliferation, apoptosis and genotoxicity of lymphocytes in patients with cerebral infarction (CI). Methods The lymphocytes in peripheral blood in patients with CI were sampled before and after treatment and cultured, and then, some parameters such as the mitosis index (MI), cell cyclical kinetics index (CCKI), sister chromatid exchanges frequencies (SCEF) and apoptosis were analyzed in order to explore the effects of ILIB on lymphocytes. Results The proliferative activities of lymphocytes were significantly increased by ILIB (P<0.05) as compared with that before the treatment and that of the control group. There was a correlation between the proliferation and dose of ILIB(P<0.001). However, the effects of ILIB on cell cycles of lymphocytes were not significant. There was no significant difference between the treatment group and the control group with regard to CCKI and SCEF no matter before or after treatment (P>0.05). After ILIB, the rate of apoptosis in patients with CI was significantly increased when compared with that before treatment and that of the control group, as revealed by flow cytometry (FCM) (P<0.001). Conclusion ILIB could increase the proliferative activities leading to higher apoptosis rate of lymphocytes, but have no genotoxicity.