癌症患者群体LAK细胞的体外抗肿瘤的细胞毒活性

Cytotoxicity of LAK Cells from Cancer Patients against Tumor Cells

本研究应用^(125)I-UdR释放实验,测定了大量随机取样于111位癌症患者的外周血淋巴细胞以及从它们中诱导出的处于不同培养期的淋巴因子激活的杀伤细胞对K562和Raji肿瘤细胞的体外细胞毒活性.对560个有效数据的统计分析,获得以下结果:1.经过培养系统的作用,对K562细胞的细胞毒活性,从培养前的34.78±25%上升到8～13天培养期的68.04±17.3%之后基本稳定于近70%的水平,直至23～27天的培养期.此细胞毒活性的构成比模式表明,在培养之前,样品分布于很广的活性区域(10～90%);培养 8～13天和以后的培养期,约85%的样品集中到高活性区域(50～95%).2.对 Raji细胞的细胞毒活性,从培养前的8.9±8%上升到8～13天培养期的42.1±22%之后,在随后的培养期中,维持于约35%的水平.对Raji的细胞毒活性的构成比显示,在培养前,全部样品处于低活性区域(<25%);在培养过程中,部分样品(约30%)向高活性区域发生明显的扩展(50～90%),但另一部份样品(约40%)一直位于低活性区域(<35%).这样形成高低两个分布区域.这种现象的机理值得进一步探讨.

The peripheral blood lymphocytes (PBLs) from 111 cancer patients were isolated and cultured respectively for 23 - 27 days in the medium mainly conditioned by IL-2 and PHA. With ^(125) I-UdR release method, sampling in random way, we examed the cytotoxicities of PBLs and lymphokine-activated-killer (LAK) cells in different culture periods in vitro. The statistic analysis on sufficient data gave the following results: 1. The cytotoxicity against K562 cells increased from 34.78 ±25% of the PBLs to 68.04 ±17.3% of the cells cultured for 8-13 days, afterward, kept about 70% to 23 - 27 days. The constitutional proportion patterns showed that the freshly isolated samples dispersed at a wide range of cytotoxicities (10 - 90%), and that most of the cultured samples ( ~ 85%) concentrated on the range of higher cytotoxicities (50 ~ 95% ) after 8-13 days. 2. The cytotoxicity against Raji cells rose from 8.9 ±8% of the fresh PBLs to 42.1 ±22% of the LAK cells at 8 - 13 days, and maintained about 35% in the following periods. The constitutional proportion patterns of the cytotoxicity against Raji illustrated that all the fresh PBL samples were below 25% of cytotoxicity, and that during the culture, one part of the samples ( ~ 30%) acquired the higher cytotoxicities (50 -90% ), but the other part of the samples ( - 40%) remained at lower cytotoxicities (below 35% ) . The mechanisms behind these phenomena are worth further investigating.