[Apple polyphenol inhibited the proliferation and migration of breast cancer cell MDA-MB-231 mediated by UHRF1].

Objective: To investigate the effects of apple polyphenol on cell proliferation and migration of breast cancer cell line MDA-MB-231, and explore the potential mechanism.
Methods: The breast cancer cells in the logarithmic phase were treated with 0, 50, 100, 200, 400 and 800 μg/m L of apple polyphenol for 24, 48 and 72 h, then Trypan blue staining was employed to detect cell vitality; CCK8 kit was used to determine cell growth and proliferation; cell migration ability was observed by scratch experiment, and the change of proteins expression level was assessed by Western blot.
Results: Apple polyphenol could content-dependently inhibit breast cancer cell's vitality and proliferation between 0 and 800 μg/m L, decrease the proteins level of ubiquitinlike with PHD and ring finger domain 1( UHRF1) and matrix metalloproteinases-2( MMP2), and the protein levels of DNA methyltransferases 3 a( DNMT3 a) and DNMT3 b, themolecular targets of UHRF1, also decreased. Apple polyphenol inhibition of cell 's migration was more significant between 400 and 800 μg/mL.
Conclusion: Apple polyphenol inhibited the vitality, cell growth and proliferation, and migration of breast cancer cells MDA-MB-231 by decreasing the proteins expression of UHRF1 and MMP2, and the downstream targets of UHRF1, DNMT3 a and DNMT3 b, also decreased.