Figure 1: Effects of Helicteres isora fruit extracts on the duct formation. (A) Morphology of RCM-1 cells in a well at 1 × 105 cells. (B) RCM-1 cells treated with the medium and 0.1% of DMSO as a negative control. (C) Duct formation of RCM-1 cells treated with 200 μg/mL methylthio acetic acid as a positive control. (D) Duct formation of RCM-1 cells treated with 80% ethanol of Helicteres isora fruit extract at 100 μg/mL. Values expressed are mean ± SD of four parallel measurements.