%0 Journal Article %T H2O2 Inhibits Proliferation and Mediates Suppression of Migration via DLC1/RhoA Signaling in Cancer Cells %J Asian Pacific Journal of Cancer Prevention %I West Asia Organization for Cancer Prevention (WAOCP), APOCP's West Asia Chapter. %Z 1513-7368 %D 2015 %\ 04/01/2015 %V 16 %N 4 %P 1637-1642 %! H2O2 Inhibits Proliferation and Mediates Suppression of Migration via DLC1/RhoA Signaling in Cancer Cells %K H2O2 %K Proliferation %K deleted in liver cancer 1 %K RhoA %K migration %R %X Background: RhoGTPase-activating proteins (RhoGAPs) regulate RhoGTPases in cells, but whetherindividual reactive oxygen species (ROS) regulate RhoGAPs is unknown. Our previous published papers haveshown that deleted in liver cancer 1 (DLC1) inhibits cancer cell migration by its RhoGAP activity. The presentstudy was designed to explore the role of H2O2 in regulation of DLC1. Materials and Methods: We treated cells withH2O2 for 24h and phenotypic changes were analyzed by MTT, RT-PCR, Western blotting, immunofluorescencestaining and wound healing assays. Results: H2O2 downregulated cyclin D1 and cyclin E to inhibit proliferation,and upregulated BAX to induce apoptosis in MCF-7 cells. Compared with non-tumorigenic cells, H2O2 increasedexpression of DLC1 and reduced activity of RhoA in cancer cells. Stress fiber production and migration werealso suppressed by H2O2 in MDA-MB-231 cells. Conclusions: Our study suggests that H2O2 inhibits proliferationthrough modulation of cell cycle and apoptosis-related genes, and inhibits migration by decreasing stress fibersvia DLC1/RhoA signaling. %U https://journal.waocp.org/article_30631_45900ce54d7a311f854d7e9a2d2add4e.pdf