• 1. Department of General Surgery, Xuanwu Hospital, Capital Medical University, Beijing 100053, China;;
  • 2. Surgical Laboratory, Xuanwu Hospital, Capital Medical University, Beijing 100053, China;
LI Fei, Email: feili36@ccmu.edu.cn
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Objective  To investigate the effect of caveolion-1 on the growth and proliferation in human breast
cancer MCF7 cell in vitro and in vivo and approach its mechanisms.
Methods  The plasmid pCI-neo-cav-1 and its corres-ponding empty vector (pCI-neo) were transfected into MCF7 cell line. The expressions of caveolin-1 and vascular endoth-elial growth factor (VEGF) in transfectants were subsequently confirmed by Western blot analysis. A pair of monoclonal cell lines, MCF7/cav-1 and MCF7/vec, were chose for future studies. The colony formation ability of tumor cells was detected by anchorage-independent growth assay. Xenograft tumor models in nude mice were established. Immunohisto-chemistry was used to characterize Ki-67 and VEGF levels in the tumors tissues.
Results  Caveolin-1 expression was up-regulated in the MCF7/cav-1 cell as compared with the MCF7/vec cell (P<0.01) and the MCF7 cell (P<0.01). Caveolin-1 overexpression markedly reduced the capacity of the cells to form colonies in soft agar (P<0.01). Compared with the MCF7/vec cell, VEGF protein expression reduced in the MCF7/cav-1 cell (P<0.01). In vivo experiments in nude mice, the overexpression of caveolin-1 resulted in significant growth inhibition of the xenograft breast tumors. The Ki-67 staining was weak and the VEGF staining was negative by immunohistochemistry that indicated the caveolin-1 inhibited the proliferation in human breast cancer MCF7 cell.
Conclusion  The caveolin-1 might inhibit the growth and proliferation in human breast cancer MCF7 cell through suppressing activation of VEGF signaling pathway.

Citation: WANG Xiaohui,LI Fei,LUO Bin,LIU Shuang,CUI Yeqing,SUN Haichen.. Inhibition Effect of Caveolin-1 on Breast Cancer Cells Proliferation In Vitro and In Vivo and Its Mechanisms. CHINESE JOURNAL OF BASES AND CLINICS IN GENERAL SURGERY, 2013, 20(5): 481-486. doi: Copy

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