Figure 4.
Protective effect of MUM273b extract against UVB‐induced cytotoxicity in HaCaT keratinocytes. (a) The HaCaT cells were exposed to UVB (50 mJ/cm2) in the presence of MUM273b extract at different concentrations. The cell viability was measured by MTT assay after 24 hr. All data are present as mean ± SD (n = 5). # indicates p < 0.05 between control (without UVB) and cells exposed to UVB (50 mJ/cm2). *indicates p < 0.05 between cells (without extract) and MUM273b extract‐treated cells after UVB exposure. (b) The morphological changes of HaCaT cells observed under phase‐contrast microscopy (×100)