Seo, Ji-Min Cho, Kyung-Jin Kim, Eun-Young Choi, Man Ho Chung, Bong Chul Kim, Jae-Hong 2024-01-20T17:30:41Z 2024-01-20T17:30:41Z 2021-09-02 2011-03-31 1226-3613 https://pubs.kist.re.kr/handle/201004/130506 The incidence rates of urinary bladder cancer continue to rise yearly, and thus new therapeutic approaches and early diagnostic markers for bladder cancer are urgently needed. Thus, identifying the key mediators and molecular mechanisms responsible for the survival of bladder cancer has valuable implications for the development of therapy. In this study, the role of BLT2, a receptor for leukotriene B-4 (LTB4) and 12(S)-hydroxyeicosatetraenoic acid (HETE), in the survival of bladder cancer 253J-BV cells was investigated. We found that the expression of BLT2 is highly elevated in bladder cancer cells. Also, we observed that blockade of BLT2 with an antagonist or BLT2 siRNA resulted in cell cycle arrest and apoptotic cell death, suggesting a role of BLT2 in the survival of human bladder cancer 253J-BV cells. Further experiments aimed at elucidating the mechanism by which BLT2 mediates survival revealed that enhanced level of reactive oxygen species (ROS) are generated via a BLT2-dependent up-regulation of NADPH oxidase members NOX1 and NOX4. Additionally, we observed that inhibition of ROS generation by either NOX1/4 siRNAs or treatment with an ROS-scavenging agent results in apoptotic cell death in 253J-BV bladder cancer cells. These results demonstrated that a 'BLT2-NOX1/4-ROS' cascade plays a role in the survival of this aggressive bladder cancer cells, thus pointing to BLT2 as a potential target for anti-bladder cancer therapy. English 생화학분자생물학회 PANCREATIC-CANCER CYCLE ARREST APOPTOSIS GROWTH INHIBITION LY293111 PATHWAY LIPOXYGENASE ACTIVATION EXPRESSION Up-regulation of BLT2 is critical for the survival of bladder cancer cells Article 10.3858/emm.2011.43.3.014 1 Experimental & Molecular Medicine, v.43, no.3, pp.129 - 137 Experimental & Molecular Medicine 43 3 129 137 scie scopus kci ART001537894 000289050700001 2-s2.0-79953273234 Biochemistry & Molecular Biology Medicine, Research & Experimental Biochemistry & Molecular Biology Research & Experimental Medicine Article PANCREATIC-CANCER CYCLE ARREST APOPTOSIS GROWTH INHIBITION LY293111 PATHWAY LIPOXYGENASE ACTIVATION EXPRESSION biological markers cell survival LTB4R2 protein, human NADPH oxidase reactive oxygen species urinary bladder neoplasms