MKI67 and neoplasm: Surgically removed tumors from vehicle-control and PCLX-001 treated mice confirm a concentration-dependent reduction in overall tumor size following 21 days of PCLX-001 treatment (Fig. 7e) concomitant with increased in apoptosis (increased cleaved caspase-3; Fig. 7f) and reduction in cell proliferation (as determined by Ki-67 analysis; Fig. 7g).