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  • Title: Inhibitory effect of an isopropanolic extract of black cohosh on the invasiveness of MDA-mB 231 human breast cancer cells.
    Author: Hostanska K, Nisslein T, Freudenstein J, Reichling J, Saller R.
    Journal: In Vivo; 2007; 21(2):349-55. PubMed ID: 17436587.
    Abstract:
    BACKGROUND: The isopropanolic extract of black cohosh (iCR)b has recently been reported to exert antiproliferative and apoptosis-inducing effects on estrogen receptor-positive MCF-7, as well as estrogen receptor-negative MDA-MB 231 human breast cancer cells. To broaden observations, the anti-invasive effects of iCR and its two major fractions triterpene glycosides (TTG) and cinnamic acid esters (CAE) were tested in highly invasive MDA-MB 231 cells. MATERIALS AND METHODS: The effect of drugs upon the invasive potential of MDA-MB231 cells was studied in BD Biocoat Matrigel invasion chambers over a period of 24 h. RESULTS: The suppression of invasion reached 51.8% at 77.4 microg/ml of iCR, an extract concentration where 89% of MDA-MB231 cells were viable. TTG and CAE reduced cell invasion by 34% and 25.5%, respectively, at a dose of 5 microg/ml. The motility of cells was only moderately reduced. CONCLUSION: In this study iCR was found to suppress tumor cell invasion without affecting cell viability. This result together with the antiproliferative and apoptosis-inducing effect of iCR suggest its use as a secure agent in postmenopausal hormone replacement therapy with additional chemopreventive activity.
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