Task: Answer Verification
Input (English): Question: Does genistein in the presence of 17beta-estradiol inhibit proliferation of ERbeta breast cancer cells?
Answer: Our results suggest that in cells with a predominance of ERalpha, genistein acts as an agonist to ERalpha, and in cells with ERbeta alone, genistein most likely acts as an antiestrogen. Our results also suggest that genistein could be useful as a chemotherapeutic agent in premenopausal women with breast cancer of the ERalpha-negative and ERbeta-positive type.
Output (English): yes