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• 基础研究 • 上一篇    下一篇

血管内皮细胞生长因子对Copenhagen大鼠乳腺癌发生的影响

林 哲1,吴 琼2,曲珊珊2,全成实2*,李玉林2   

  1. 1. 吉林大学第二医院普通外科,吉林 长春130041;2. 吉林大学基础医学院 病理生物学教育部重点实验室,吉林 长春130021
  • 收稿日期:2004-03-18 修回日期:1900-01-01 出版日期:2005-05-28 发布日期:2005-05-28
  • 通讯作者: 全成实

Effects of vascular endothelial growth factoron mammary carcinogenesis in Copenhagen rats

LIN Zhe1,WU Qiong2,QU Shan-shan2,QUAN Cheng-shi2*,LI Yu-lin2   

  1. 1. Department of General Surgery,Second Hospital,Jilin University,Changchun 130041,China;2.ME Key Laboratory of Pathobiology, School of Basic Medical Sciences,Jilin University, Changchun 130021,China
  • Received:2004-03-18 Revised:1900-01-01 Online:2005-05-28 Published:2005-05-28
  • Contact: QUAN Cheng-shi

摘要: 目的:探讨外源性血管内皮细胞生长因子(VEGF)对致癌剂N-nitroso-N-methylurea(NMU)诱导Copenhagen(COP)大鼠乳腺癌发生的影响。 方法:NMU诱导的雌性COP大鼠持续给VEGF后,观察其乳腺癌的发生情况,同时采用RT-PCR及组织病理学等方法,检测大鼠乳腺上皮细胞中VEGF mRNA表达及乳腺组织中MAST细胞的浸润状态。 结果:①COP大鼠乳腺癌的发生率在VEGF处理组与未处理组之间差异无显著性(P>0.05)。②正常青春期COP大鼠乳腺上皮细胞VEGF mRNA的表达与阳性对照组Bufllo(BUF)大鼠相比差异无显著性,但230 d后前者的表达明显低于后者(P<0.05)。③由NMU诱导的COP大鼠乳腺癌上皮细胞中无VEGF的表达,而BUF大鼠有VEGF的阳性表达,两者差异有显著性(P<0.05)。④NMU处理的COP大鼠乳腺组织的增大淋巴结中有大量MAST细胞聚集,BUF组无MAST细胞的聚集。 结论:外源性VEGF不足以增加COP大鼠乳腺癌的发生率,但内源性VEGF表达减低及免疫反应的增加(MAST细胞聚集)在COP大鼠肿瘤抵抗性方面起一定的作用。

关键词: 血管, 内皮生长因子, 乳腺肿瘤, Copenhagen大鼠

Abstract: Objective To study the effects of extraneous vascular endothelial growth factor (VEGF) on mammary carcinogenesis in resistant Copenhagen(COP)rats induced by N-nitroso-N-methylurea(NMU). Methods VEGF were administered in a sustained releasing formula to female COP rats treated with NMU and mammary tumor incidences in VEGF-treated animals and controls were detected. RT-PCR and histopathology were used for analysis of VEGF expression and MAST cells accumulation. Results ①There was no significance difference of mammary tumor incidence between VEGF-treated animals and controls. ②Mammary epithelial cells from pubescent BUF and COP rats expressed substantial levels of VEGF messages, whereas cells prepared from 230-day old COP rats showed negligible levels of VEGF mRNA. ③Mammary epithelial cells from tumors developed in susceptible BUF rats expressed VEGF, whereas VEGF messages were barely detectable in tumors induced in COP rats. ④Enlargement of the intramammary lymph nodes with prominent MAST cells was observed in NMU-treated COP rats, but not in NMU-treated BUF rats. Conclusion These results suggest that down-regulation of VEGF expression is insufficient for resistance to mammary carcinogenesis, and negative or low expression of endogenic VEGF and enhanced immune response with MAST cells accumulation may also play a role in conferring resistance in the COP rats.

Key words: vascular, endothelial growth factors, brest neoplasms, Copenhagen rat

中图分类号: 

  • R-332