title: A structurally optimized celecoxib derivative inhibits human pancreatic cancer cell growth.
abstract: Deregulation of the phosphatidylinositol 3-kinase (PI-3K)/PDK-l/Akt signaling cascade is associated with pancreatic cancer tumor invasion, angiogenesis, and tumor progression. As such, it has been postulated that PDK-1/Akt signaling inhibitors may hold promise as novel therapeutic agents for pancreatic cancer. Disadvantages of currently available Akt inhibitors include tumor resistance, poor specificity, potential toxicity, and poor bioavailability. Previous studies have demonstrated that OSU-03012, a celecoxib derivative, specifically inhibits PDK-1 mediated phosphorylation of Akt with IC(50) values in the low muM range. Human pancreatic cancer cell lines AsPC-1, BxPC-3, Mia-PaCa 2, and PANC-1 were cultured in media containing varying concentrations of OSU-03012, 5-fluorouracil (5-FU), and gemcitabine, and changes in Akt phosphorylation and cell viability were evaluated using western blotting and a 3-(4, 5-dimethylthiazolyl-2)-2, 5-diphenyltetrazolium bromide (MTT) assay, respectively. Treatment with OSU-03012 resulted in decreased PDK-1-mediated Akt phosphorylation and cell growth inhibition for all cell lines with IC(50) values ranging between 1.0 and 2.5 muM. Resistance to 5-FU and gemcitabine was observed in cell lines AsPC-1 and BxPC-3. Further analyses indicate that OSU-03012 induces both proapoptotic and antiproliferative effects in these cells. Taken together, these data suggest that OSU-03012 has potential value as a novel therapy for pancreatic cancer.
authors.affiliation: Departments of Surgery and Internal Medicine, College of Medicine, The Ohio State University, 410 West 10th Avenue, Columbus, OH 43210, USA.
authors.forename: Junan
authors.initials: J
authors.lastname: Li
authors.forename: Jiuxiang
authors.initials: J
authors.lastname: Zhu
authors.forename: W Scott
authors.initials: WS
authors.lastname: Melvin
authors.forename: Tanios S
authors.initials: TS
authors.lastname: Bekaii-Saab
authors.forename: Ching-Shih
authors.initials: CS
authors.lastname: Chen
authors.forename: Peter
authors.initials: P
authors.lastname: Muscarella
mesh_terms: D064413:3-Phosphoinositide-Dependent Protein Kinases; D000964:Antimetabolites, Antineoplastic / Q000494:pharmacology; D000970:Antineoplastic Agents / Q000494:pharmacology*; D017209:Apoptosis / Q000187:drug effects; D015153:Blotting, Western; D002455:Cell Division / Q000187:drug effects; D045744:Cell Line, Tumor; D049109:Cell Proliferation / Q000187:drug effects; D002470:Cell Survival / Q000187:drug effects; D004396:Coloring Agents; D003841:Deoxycytidine / Q000031:analogs & derivatives / Q000494:pharmacology; D019008:Drug Resistance, Neoplasm; D004791:Enzyme Inhibitors / Q000494:pharmacology*; D005472:Fluorouracil / Q000494:pharmacology; D006801:Humans; D010190:Pancreatic Neoplasms / Q000473:pathology* / Q000503:physiopathology; D000081082:Phosphoinositide-3 Kinase Inhibitors; D010766:Phosphorylation / Q000187:drug effects; D017346:Protein Serine-Threonine Kinases / Q000037:antagonists & inhibitors; D051057:Proto-Oncogene Proteins c-akt / Q000037:antagonists & inhibitors; D011720:Pyrazoles / Q000494:pharmacology*; D012264:Ribonucleotide Reductases / Q000037:antagonists & inhibitors; D013449:Sulfonamides / Q000494:pharmacology*; D013778:Tetrazolium Salts; D013844:Thiazoles; D000093542:Gemcitabine
chemical_list: D000964:Antimetabolites, Antineoplastic; D000970:Antineoplastic Agents; D004396:Coloring Agents; D004791:Enzyme Inhibitors; C500894:OSU 03012; D000081082:Phosphoinositide-3 Kinase Inhibitors; D011720:Pyrazoles; D013449:Sulfonamides; D013778:Tetrazolium Salts; D013844:Thiazoles; D003841:Deoxycytidine; D012264:Ribonucleotide Reductases; D064413:3-Phosphoinositide-Dependent Protein Kinases; D017346:Protein Serine-Threonine Kinases; D051057:Proto-Oncogene Proteins c-akt; C022616:thiazolyl blue; D005472:Fluorouracil; D000093542:Gemcitabine