RESUMEN
Objective To investigate the expression of TGF-β and TGF-β receptor in human breast cancer cell Bcap-37 inhibited by soybean isoflavones. Methods mRNA and protein of TGF-β1、TGF-βRⅠ in Bcap-37 cells were examined with reverse transcription ploymerase chain reaction(RT-PCR) and immunohistochemistry after cells were treated with daidein or genistein for 1-4 d.The expression of TGF-β1 and TGF-β2 was determined with TGF-β resistance test. Results The TGF-β1, TGF-β2 and TGF-β recepor increased in Bcap-37 cells at a concentration of 3×10-5 mol/L of genistein. No changes was found when treated with daidzein. Conclusion Genistein may inhibit the proliferation of Bcap-37 cells and accompany with increasing expression of TGF-β1, TGF-β2 and TGF-β receptor.