SAHA’s effect on cell surface markers. (A) 24 hours SAHA treatment, which was shown to alter cell membrane fluidity, reverse (transiently) drug resistance, and slightly increase MCF-7/Adr’s mobility, showed no effect on the expression of MCF-7/Adr surface markers. (B, C, D) 14 days of SAHA treatment on MCF-7/Adr passage 6, MCF-7 and MDA-MB-231 respectively. (E. F) human mesenchymal stem cell surface marker on hMSC before and after 7 days of SAHA treatment. SAHA treatment for 7 days (dosing every other day) had no effect on hMSC’s identification markers.