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Effect of Rhodiola on nude mice with human breast cancer xenografts

QI Wei-lin, LI Yong, LU Hong-fen,SHI Hai-ming, FAN Wei-hu (Department of Cardiology, Huashan Hospital, Fudan University, Shanghai 200040; 2 Department of Pathology, Cancer Hospital, Fudan University; Shanghai 200032,China)  
Background and purpose:In in vivo and vitro studies, Rhodiola shows anti-cancer effect, but there were few reports about the effects of Rhodiola on growth of breast cancer and its possible mechanism. Methods:Xenograft of Human breast cancer cells MDA-MB-435 in female BALB/c nude mice were treated with and without Rhodiola extracts. The tumor volume and proliferation index (PCNA and Ki67) of the xenograft were studied.Results:After Rhodiola was given to nude mice for 4 weeks, the mean tumor volume was smaller (99.95mm 3 vs. 174.60mm 3 ) compared to untreated group,but there was no statistical significance(P=0.535). The proportion and intensity of cellular Ki-67 staining in Xenografts were decreased as compared to the untreated group, (average H-score 152.8 vs. 86, P=0.014), the same trend could be found for cellular PCNA staining, but there was no statistical significance(242 vs.210,P=0.221).Conclusions:The mechanism of anti-cancer effect of Rhodiola may be partly through inhibiting the proliferation of cancer cells in vivo.
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