ABSTRACT-Researches on PC-3 human prostate cancer cell lines control are needed in the present decades. The anticancer activity of aqueous extract of Ipomoea sepiaria was investigated by 3-(4,5-dimethylthiazol-2-yl)-2, 5-diphenyltetrazolium (MTT) assay using PC-3 cell line. The present experimentation was showed that aqueous extract of Ipomoea sepiaria, when subjected to different concentrations on PC-3 cells showed IC50 cell inhibition at about 5µM for 48 hours and about 2µM for 72 hours. PTEN interacts with other expression proteins like Jun proto-oncogene, V-akt murine thymoma viral oncogene homolog 1 and 2, Tumor protein p53, Phosphatidylinositol-4,5-bisphosphate 3-kinase, etc. The present experiment shown that the leaf extract may involve in protein suppressor mechanism for PTEN in controlling of prostate cancer.