Experimental Studyon Anti－tumor Effect of SplenocytesInduced by Anti－CD3McAb，PHA and IL－2

The proliferation of splenocytes from healthy adults was induced by anti-CD3 McAb,PHA and IL-2.The proliferative capability and anti-tumor activity as well as phenotypes of the splenocytes cultured in different medium systems were studied.The results showed that anti-CD3 McAb and PHA not only enhanced the proliferation of splenocytes induced by IL-2,but also produced synergism if used simultaneously.The expressions of CD4 and Tac of cellular surface markers were increased after splenocytes were induced by anti-CD3 McAb and PHA.The results of anti-tumor activity of LAK cells suggested that PHA had the capability to promote anti-tumor activity of LAK cells by both direct and in direct pathways,but anti-CD3 McAb indirectly promoted anti-tumor activity of LAK cellsby enhanctng splenocyte proliferation.

PROLIFERATION OF ANTI－CD_3 McAb AND IL－2 INDUCED SPLENOCYTES AND ANTITUMOR EFFECT OF THEIR CULTURE SUPERNATANTS

The proliferation of splenocytes from health adults was induced by anti-CD3 McAb and IL-2.The proliferative potential of the splenocytes and antitumor activity of their culture supernatants of splenocytes were studied.The results showed that anti-CD3 McAb not only enhanced the proliferation of the splenocytes directly,but also enhanceil that of induced by IL-2.Their enhancing effect was more significant when the incubation time in vitro was prolonged.The culture supernatants of anti-CD3 and IL-2 induced splenocytes also had the antitumor activity and enhancing capability to the antitumor activity of LAK tells.The results suggested that LAK cells could secret lymphokine,and this effect would be synergically promoted when anti-CD3 and IL-2 were simultaneously used.

一种检测可溶性白细胞介素2受体夹心法ELISA的建立

采用两种识别不同表位的小鼠抗人白细胞介素2受体(IL-2R)单克隆抗体(McAb),在国内首次建立了检测可溶性IL-2R(sIL-2R)的夹心法ELISA,并进行了初步应用。结果显示:本法特异性强、敏感性高、重复性好、操作简便,能检出正常人、某些患者血清中以及细胞培养上清中sIL-2R,可用于基础和临床免疫学研究。

人白细胞介素-2单克隆抗体的研究

应用杂交瘤技术获得6株抗人白细胞介素-2单克隆抗体细胞株，并对其特性进行分析，各单抗滴度不一，有的高达10(16)，有的则在1∶10左右，大多数（5种）为IgG型，少数（1种）为IgM型。单克隆抗体与纯化的IL－2有明显的特异性吸附（P＜0．01）。有4种单克隆抗体有相同的吸附位点，另外2种至少有3个吸附位点，位阻表现不一。

抗IL-2单抗诱导SLE患者外周血活化T淋巴细胞凋亡的研究

采用流式细胞仪定量研究了抗白介素２单抗（ＩＬ２ＭｃＡｂ）诱导７０例系统性红斑狼疮（ＳＬＥ）患者外周血活化Ｔ淋巴细胞凋亡的百分率，并与正常人对照组相比较。结果表明：ＩＬ２ＭｃＡｂ能诱导ＳＬＥ患者及正常人外周血活化Ｔ淋巴细胞凋亡，且ＳＬＥ患者明显高于正常人（Ｐ＜００１），活动期高于非活动期（Ｐ＜００１）；ＩＬ２ＭｃＡｂ对ＳＬＥ患者外周血活化Ｔ淋巴细胞凋亡的调控呈剂量效应和时间效应。提示：从抗ＩＬ２ＭｃＡｂ能诱导ＳＬＥ患者外周血活化Ｔ淋巴细胞凋亡，可间接地证明ＩＬ２在ＳＬＥ疾病过程通过抑制外周血活化Ｔ淋巴细胞凋亡的作用而参与ＳＬＥ免疫病理损伤。

克山病患者T细胞亚群分析及病区粮因素对大鼠T细胞功能的影响

作者用OKT系统单克隆抗体检测克山病患者T淋巴细胞亚群,发现患者T淋巴细胞亚群数量存在明显异常;用小鼠胸腺细胞生长法检测病区粮喂养大鼠的IL-2活性,发现实验组明显低于非病区粮对照组,但病区粮加硒组大鼠IL-2活性有显著提高。提示克山病的发生可能与自身免疫反应有关,病区粮因素能够降低大鼠的T细胞功能,微量元素硒具有增强机体细胞免疫功能的作用。