RRC ID 69264
Author Kudoh A, Oishi T, Itamochi H, Sato S, Naniwa J, Sato S, Shimada M, Kigawa J, Harada T.
Title Dual inhibition of phosphatidylinositol 3'-kinase and mammalian target of rapamycin using NVP-BEZ235 as a novel therapeutic approach for mucinous adenocarcinoma of the ovary.
Journal Int J Gynecol Cancer
Abstract Ovarian mucinous adenocarcinoma (MAC) resists standard chemotherapy and is associated with poor prognosis. A more effective treatment is needed urgently. The present study assessed the possibility of molecular-targeted therapy with a novel dual inhibitor of phosphatidylinositol 3'-kinase (PI3K) and mammalian target of rapamycin (mTOR), NVP-BEZ235 (BEZ235) to treat of MAC. Seven human MAC cell lines were used in this study. The sensitivity of the cells to BEZ235, temsirolimus, and anticancer agents was determined with the WST-8 assay. Cell cycle distribution was assessed by flow cytometry, and the expression of proteins in apoptotic pathways and molecules of the PI3K/Akt/mTOR signaling pathways was determined by Western blot analysis. We also examined the effects of BEZ235 on tumor growth in nude mice xenograft models. The cell lines showed half-maximal inhibitory concentration values of BEZ235 from 13 to 328 nmol/L. Low half-maximal inhibitory concentration values to BEZ235 were observed in MCAS and OMC-1 cells; these 2 lines have an activating mutation in the PIK3CA gene. NVP-BEZ235 down-regulated the protein expression of phosphorylated (p-) Akt, p-p70S6K, and p-4E-BP1, suppressed cell cycle progression, up-regulated the expression of cleaved PARP and cleaved caspase 9, and increased apoptotic cells. Synergistic effects were observed on more than 5 cell lines when BEZ235 was combined with paclitaxel or cisplatin. The treatment of mice bearing OMC-1 or RMUG-S with BEZ235 significantly suppressed tumor growth in MAC xenograft models without severe weight loss. We conclude that the PI3K/Akt/mTOR pathway is a potential therapeutic target and that BEZ235 should be explored as a therapeutic agent for MAC.
Volume 24(3)
Pages 444-53
Published 2014-3-1
DOI 10.1097/IGC.0000000000000091
PMID 24552895
MeSH Adenocarcinoma, Mucinous / drug therapy* Animals Apoptosis / drug effects Cell Cycle / drug effects Cell Line, Tumor Drug Synergism Female Humans Imidazoles / pharmacology Imidazoles / therapeutic use* Mice Mice, Nude Ovarian Neoplasms / drug therapy* Phosphoinositide-3 Kinase Inhibitors* Quinolines / pharmacology Quinolines / therapeutic use* Signal Transduction / drug effects TOR Serine-Threonine Kinases / antagonists & inhibitors* Up-Regulation / drug effects Xenograft Model Antitumor Assays
IF 2.095
Human and Animal Cells JHOM-1(RCB1676) JHOM-2B(RCB1682)