三七虫草混合粉抗小鼠乳腺肿瘤及其新生血管效应研究

Study of Panax Notoginseng F.H.Chen and Cordyceps sinensis Sacc. Powder Inhibiting Mouse Mammary Adenocarcinoma and Tumor Angiogenesis

目的观察三七虫草混合粉抗移植性小鼠乳腺肿瘤(EMT6)及其新生血管形成效应。方法应用小鼠可移植性EMT6细胞株,经培养传代后,以纯系BALB/C小鼠为荷瘤动物进行移植,并以三七虫草混合粉进行干预,在观察肿瘤抑制率基础上,将肿瘤组织以常规石腊包埋、切片,应用免疫组化法观察肿瘤组织微血管密度(MVD)、血管内皮生长因子(VEGF)、金属蛋白酶组织抑制因子Ⅱ(TIMP-2)表达。结果所设计两个实验剂量组的肿瘤抑制率分别为48.95%、37.64%;实验两组肿瘤组织MVD、VEGF阳性表达明显降低,TIMP-2表达水平明显增加。结论三七虫草混合粉能够抑制小鼠乳腺肿瘤生长,抑制肿瘤新生血管形成可能是其作用机制之一。

Objective To observe inhibition rate of mouse mammary adenocarcinoma （EMT6） and inhibition effect on tumor angiogenesis of Panax notoginseng F.H. Chen and Cordyecps sinensis Sacc. powder. Methods BALB/C mice as bearing cancer animals with subcultured mouse-transplantable EMT6 cell train had accepted intervention treatment by Panax notoginseng F.H. Chen and Cordyceps sinensis Sacc. powder. In this way, inhibition rate of the mouse-transplanted EMT6 by the powder was recorded and the expression of microvessel density （MVD）, vascular endothelial growth factor （VEGF） and tissue inhibitor of metaUoproteinase-2 （TIMP-2） in the tumor tissue after paraffin imbedding and section were detected through immunohistochemistry technique. Results The tumor inhibition rates of two designed dose groups were separately 48.95% and 37.64%. MVD and VEGF expressions of tumor tissue in the two group were significantly suppressed while the TIMP-2 expression increased. Conclusions Panax notoginseng F.H.Chen and Cordyceps sinensis Sacc. powder can restrain the growth of EMT6, and the pathway of this function is likely related to inhibiting tumor angiogenesis.