NK／LAK细胞对人口腔癌耐细胞药株杀伤活性的观察

OBJECTIVE: To understand the relation between cytotoxic activity of immunologic effector cells and multidrug resistance of the tumor cells. METHODS: Continuous observation of the morphological changes and MTT colorimetry were employed to evaluate the cytotoxic activity of lymphokine-activated killer (LAK) cells and natural killer (NK) cells against multidrug-resistant (MDR) human oral carcinoma cell line-KBV200 (before and after reversal of MDR) and parental drug-sensitive cell line KB. The morphologic changes of LAK cells and the 3 target cell lines were observed continuously under inverted microscope 3 h after co-culture of LAK cells with one of three target cell lines respectively. The lysis rates of three tumor cell lines in response to co-culture with LAK or NK cells were determined using MTT colorimetry. RESULTS: In comparison with the parental drug-sensitive cell line KB, both KBV200 and its reserved cell line by verapamil (KBVV) showed earlier adherence and greater number of cells lysed by LAK. In MTT colorimetry assay, the cytotoxicity of both LAK and NK cells against the 3 cell lines was associated with the effector-to-target (E/T) cell ratio; the lysis rates of KBV200 and reversed KBV200 cells by verapamil in response to LAK and NK cells were higher than that of KB cells (P<0.05), but KBV200 and KBVV did not significantly differ (P>0.05). At the same E/T ratio, LAK cells possessed stronger cytotoxicity than NK cells against all the tumor cell lines (P<0.05). CONCLUSIONS: Immunologic effector cells possess strong cytotoxic activity against multidrug-resistant cell line KBV200. Modulation of MDR does not decrease the cytotoxic activity of the immunologic effector cells. The results of this study suggest that adoptive cell immunotherapy with immunologic effector cells may be of value in controlling the progress of MDR tumors.     

现代医学200词 199．白三烯受体

白三烯（1eukotriene，LT）是由花生四烯酸在5-脂肪氧合酶的作用下由生成的LTA。构成的生理活性脂类，可以分为LTB4和半胱氨酰LT（CysLTs：LTC4，LTD4，LTE4）。     

六种印度植物抗炎和促伤口愈合作用的研究

本文报道了印度学者近期对六种当地产植物(印度辣木、印度桔、库拉索芦荟、印度楝、长春花和圣罗勒)抗炎和促伤口愈合作用的研究结果。     

紫外分光光度法测定SOD活性的应用及其意义

本文对SOD的紫外分光光度法测定进行了实用性研究。结果表明,本文方法具有用血量少,重现性好,快速、灵敏,试剂廉价等优点。西宁地区与平原地区人群的比较测定显示,前者SOD活性明显高于后者(P<0.01)。     

糖尿病大鼠胃窦部肽能神经的改变

糖尿病大鼠胃窦部肽能神经的改变刘剑锋１杨毅２梁延杰２常国友２张忠兵１胡家露１（１第四军医大学西京医院消化内科西安７１００３３２北京解放军３０４医院病理科）关键词糖尿病降钙素基因相关肽血管活性肠肽免疫组织化学中图号Ｒ５８７．１近年来，糖尿病时肽能神经的...     

NIDDM患者肝素后血浆LPL和HEL活性变化

本研究94例非胰岛素依赖型糖尿病(NIDDM)患(合并冠心病30例)，肝至少后血浆脂蛋白脂酶(LPL)和肝内皮细胞脂酶(HEL)活性变化及其与血清高密度脂蛋白胆固醇(HDLch)水平的相关性，并对其可能在冠心病(CHD)中的作用进行初步探讨。以71例性别、年龄、体重指数(BMI)相匹配而无CHD的非糖尿病人作为对照组。结果表明：瘤人LPL活性低于对照组，HEL活性高于对照组(LPL：1．20±0．65VS2．20±0．68uMFFA／mL／h，P<0．001；HEL：4，46±1．94VS2．36±1.09uMFFA／mL／h，P<0.001。LPL活性与HDLch水平呈正相关(γ=0.278，P<0．01)，而HEL活性与HDLch水平呈负相关(P=-0．521，P<0．001)。此外，男、女性病人合并有CHD组的HEL活性明显高于无CHD组；女性病人合并CHD组的LPL活性显低于无CHD纽，但男性病人合并CHD组的LPL活性无显性降低。结合有关献讨论LPL和HEL在脂蛋白代谢方面的作用。     

止痛宁注射液镇痛效果的实验研究

止痛宁是我学院附属医院新研制的一种复方注射液，为验证其镇痛效果，我们对止痛宁及其中药成分-Ⅰ、Ⅱ号做了初步实验研究。现将实验结果，报告如下：     

卟啉类化合物抗肿瘤活性研究

卟啉类化合物的光敏疗法具有安全、简便、选择性好、高效、低毒、副作用小等优点。主要的卟啉类光敏剂有血卟啉衍生物、脱镁叶绿酸α及其衍生物、酞菁类化合物。     

舒巴坦的抑酶作用及其对氨苄西林体外抗菌活性的增强作用

本文以高效液相色谱法对国产和进口舒巴坦的抑酶作用进行了研究，同时测定了氨苄西林联合舒巴坦后的体外抗菌活性。结果表明，舒巴坦对革半阴性杆菌产生的包括能水解某些第三代头孢菌素的质粒酶如ＴＥＭ－３、ＴＥＭ－１０以及ＣＴＸ－Ｒ＾＋均具抑酶作用。氨苄西林联合舒巴坦后，对产酶葡萄球菌和肠杆菌科细菌的活性明显增强，ＭＩＣ平均值分别较氨苄西林单药降低２－５倍和２－７倍；两者联合使抗菌谱扩大，对落氏不动杆菌和硝酸盐