Fig. 1. The effect of PAB on proliferation and invasion ability of pancreatic cancer cells. (A) The effect of PAB on proliferation rate of SW1990 cells. The proliferation of pancreatic cancer cell line was markedly reduced by PAB in dose- and time-dependent manners. (B) The number of cells passed through the Transwell micropores. The number of cells was significantly decreased when treated with PAB. (C) The cell morphology detected by crystal violet staining (×100). ^*p<0.01 when compared to the control group. PAB, pseudolaric acid B.