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Ref Type Journal Article
PMID (27406983)
Authors Toriyama S, Horinaka M, Yasuda S, Taniguchi T, Aono Y, Takamura T, Morioka Y, Miki T, Ukimura O, Sakai T
Title A Histone Deacetylase Inhibitor, OBP-801, and Celecoxib Synergistically Inhibit the Cell Growth with Apoptosis via a DR5-Dependent Pathway in Bladder Cancer Cells.
Journal Molecular cancer therapeutics
Vol 15
Issue 9
Date 2016 Sep
URL
Abstract Text The prognosis of muscle-invasive bladder cancer with metastasis is poor. There have been no therapeutic improvements for many years, and an innovative therapy for muscle-invasive bladder cancer has been awaited to replace the conventional cytotoxic chemotherapy. Here, we show a candidate method for the treatment of bladder cancer. The combined treatment with a novel histone deacetylase (HDAC) inhibitor, OBP-801, and celecoxib synergistically inhibited cell growth and markedly induced apoptosis through the caspase-dependent pathway in high-grade bladder cancer cells. Furthermore, the combined treatment induced expression of death receptor 5 (DR5). We identified that knockdown of DR5 by small interfering RNA (siRNA) significantly suppressed apoptosis by the combined treatment. Therefore, we conjectured that the apoptosis induced by OBP-801 and celecoxib is at least partially dependent on DR5. However, it was interesting that the combined treatment drastically suppressed expression of DR5 ligand, tumor necrosis factor-related apoptosis-inducing ligand (TRAIL). These data suggest that there is no involvement of TRAIL in the induction of apoptosis by the combination, regardless of the dependence of DR5. Moreover, xenograft studies using human bladder cancer cells showed that the combined therapy suppressed tumor growth by upregulating expressions of DR5 and Bim. The inhibition of tumor growth was significantly more potent than that of each agent alone, without significant weight loss. This combination therapy provided a greater benefit than monotherapy in vitro and in vivo These data show that the combination therapy with OBP-801 and celecoxib is a potential novel therapeutic strategy for patients with muscle-invasive bladder cancer. Mol Cancer Ther; 15(9); 2066-75. ©2016 AACR.

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Molecular Profile Treatment Approach
Gene Name Source Synonyms Protein Domains Gene Description Gene Role
Therapy Name Drugs Efficacy Evidence Clinical Trials
Drug Name Trade Name Synonyms Drug Classes Drug Description
Gene Variant Impact Protein Effect Variant Description Associated with drug Resistance
Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
Unknown unknown urinary bladder cancer not applicable Celecoxib + OBP-801 Preclinical - Cell line xenograft Actionable In a preclinical study, the combination of Celebra (celecoxib) and OBP-801 resulted in a synergistic effect, demonstrating increased apoptotic activity and decreased tumor volume in xenograft models of bladder cancer (PMID: 27406983). 27406983
Unknown unknown urinary bladder cancer not applicable OBP-801 Preclinical - Cell culture Actionable In a preclinical study, OBP-801 treatment resulted in decreased cell viability in multiple human bladder cancer cell lines in culture (PMID: 27406983). 27406983
Unknown unknown urinary bladder cancer not applicable Celecoxib Preclinical - Cell culture Actionable In a preclinical study, Celebra (celecoxib) treatment resulted in decreased cell viability in multiple human bladder cancer cell lines in culture (PMID: 27406983). 27406983