Fig. 1

Effects of small molecules on cell morphology and expansion. a Cell morphology for cultures with various small molecules at three different concentrations. Photos were captured on day 7 (20× objective, scale bar = 50 μm). The vehicle control (VC) was composed of cytokines and DMSO; the negative control (NC) consisted of cytokines only. b CD34-positive rate and fold expansion of CD34⁺ cells for the different concentrations of each single small molecule on day 7. Data are shown as mean ± SD, n = 3. *p < 0.05, **p < 0.01, ***p < 0.001. C433 CAY10433, SR1 stemregenin1, VPA valproic acid