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• 基础研究 • 上一篇    下一篇

多次小剂量pEgr-IFNγ-Endostatin基因-放射治疗对小鼠Lewis肺癌的抑瘤作用

杨 巍1,孙 婷2,刘淑春1,朴春姬1,梁 硕1,李修义1,龚守良1*   

  1. 1. 吉林大学公共卫生学院 卫生部放射生物学重点实验室,吉林 长春 130021; 2. 吉林大学基础医学院生物化学教研室,吉林 长春 130021
  • 收稿日期:2005-10-17 修回日期:1900-01-01 出版日期:2006-07-28 发布日期:2006-07-28
  • 通讯作者: 龚守良

Anti-tumor effect of repeated low dose of pEgr-IFNγ-Endostatingene-radiotherapy on mice bearing Lewis lung carcinoma

YANG Wei1, SUN Ting2, LIU Shu-chun1, PIAO Chun-ji1, LIANG Shuo1,LI Xiu-yi1, GONG Shou-liang1*   

  1. 1. MH Radiobiology Research Unit, School of Public Health, Jilin University, Changchun 130021, China; 2. Department of Biochemistry, School of Basic Medical Sciences, Jilin University, Changchun 130021, China
  • Received:2005-10-17 Revised:1900-01-01 Online:2006-07-28 Published:2006-07-28
  • Contact: GONG Shou-liang

摘要: 目的:探讨多次小剂量pEgr-IFNγ-Endostatin基因-放射治疗对荷Lewis肺癌小鼠的抑瘤 效应。 方法:将荷瘤小鼠随机分为对照组、10 Gy照射组、4次2.5 Gy照射组、4次质粒组、质粒 + 10 Gy组和4次(质粒+2.5 Gy)组。小鼠肿瘤局部注射脂质体包裹的质粒后36 h,接受X射线照射,观察各组小鼠治疗后不同时间肿瘤生长速率, 18 d后计数各组小鼠肺转移 结节数, 并称量瘤重。 结果:治疗后12~18 d,4次(质粒+2.5 Gy)组肿瘤生长速率明显低于质粒+10 Gy组(P<0.001)。治疗后18 d,4次(质粒+2.5 Gy)组小鼠肺转移结节数和瘤重明显低于质粒+10 Gy组(分别为P<0.001和P<0.01)。 结论:多次小剂量pEgr-IFNγ-Endostatin基因-放射治疗的抑瘤效应优于单次大剂量基因-放射治疗。

关键词: 干扰素Ⅱ型, 内皮抑素, Lewis肺癌, 治疗, X射线

Abstract: Objective To study the anti-tumor effect of repeated low dose pEgr-IFNγ-Endostatin gene-radiotherapy on mice bearing Lewis lung carcinoma. Methods Mice bearing Lewis lung carcinoma were divided randomly into control, 10 Gy, 4×2.5 Gy, 4×P, P + 10 Gy and 4×(P + 2.5 Gy) group. The pEgr-IFNγ-Endostatin plasmid packaged with liposome was injected into tumors which were irradiated by X-ray 36 h later. Tumor growth rates at different time were observed after gene-radiotherapy. Number of lung metastatic nodes and tumor weight of the mice were detected 18 d after gene-radiotherapy. Results Tumor growth rate of the mice in gene-radiotherapy for four-time group was significantly lower than that for only once group 12-18 d after gene-radiotherapy. Number of lung metastatic nodes and tumor weight of the mice in gene-radiotherapy for four-time group were significantly lower than those for only once group 18 d after gene-radiotherapy. Conclusion Anti-tumor effect of repeated low dose pEgr-IFNγ-Endostatin gene-radiotherapy is better than that of high dose for only once.

Key words: interferon typeⅡ, endostatin, Lewis lung carcinoma, therapy, X-rays

中图分类号: 

  • Q691.5