观察人内皮抑素对小鼠肺腺癌LA795生长和转移的抑制作用。方法 :对重组人内皮抑素高效表达克隆 pCX的表达产物进行纯化 ,得到重组人内皮抑素 (rhES)。用亲和层析及胰弹性蛋白酶消化法从过期人血浆纯化得到人血管抑素(hAS)。将接种LA795肺腺癌细胞的T739小鼠随机分成 3组 ,分别给予rhES ,hAS或等体积PBS皮下注射 ,1次 /日 ,共 14d。观察 3组肿瘤生长情况、肺湿重、肺表面转移结节数、动物生存期 ,分别进行 q检验。 结果 :rhES组及hAS组肿瘤生长缓慢 ,8d后肿瘤逐渐回缩 ;肺湿重、肺表面转移结节数明显减少 ,动物生存期明显延长。结论 :rhES与hAS均可明显抑制LA795所致的小鼠实验性肿瘤的生长与转移 ,延长动物的生存期。

Objective: To evaluate the inhibition of human endostatin on tumor growth and metastasis of lung adenocarcinoma LA795 in mice. Methods: Recombinant human endostatin was purified from pCX expressed endostatin clones. Plasminogen was purified from outdated human plasma by affinity chromatography, and human angiostatin was produced from human plasminogen digested by elastase and purified by affinity chromatography. LA795 cells were inoculated subcutaneously into the dorsa of T739 mice, and the mice were randomized into 3 groups. From the 10th day, the first group was given 20 mg/kg of recombinant human endostatin s.c. qd, the second was treated daily s.c.of 7.5 mg/kg of human angiostatin, and the third group received daily s.c. with equal volumes of PBS for 14 days. Volumes of the subcutaneous tumors, lung weights, the number of lung surface metastases and mice life span were observed. The results were analyzed by q test. Results: The tumor volumes of both the 1st and the 2nd groups increased slowly. From the 8th day after being treated, the tumor volumes were decreasing. However, in the 3rd group, the tumor volumes increased continuously. The lung weight and the number of lung surface metastases of the 1st and 2nd groups were less than that of the 3rd group. The average survival periods of the 1st and 2nd groups were longer than that of the 3rd group. Conclusion: Human endostatin and angiostatin have strong inhibitory effects both on growth of primary tumor and metastasis of lung adenocarcinoma LA795, and prolongs the survival period of the tumor bearing mice.

南方医院院长科研基金项目