PMID- 20606035 OWN - NLM STAT- MEDLINE DCOM- 20101220 LR - 20211203 IS - 1557-3265 (Electronic) IS - 1078-0432 (Print) IS - 1078-0432 (Linking) VI - 16 IP - 14 DP - 2010 Jul 15 TI - The efficacy of the novel dual PI3-kinase/mTOR inhibitor NVP-BEZ235 compared with rapamycin in renal cell carcinoma. PG - 3628-38 LID - 10.1158/1078-0432.CCR-09-3022 [doi] AB - PURPOSE: Inhibitors of TORC1 have been shown to be active in patients with metastatic renal cell carcinoma (RCC). As the phosphatidylinositol 3-kinase (PI3K) pathway activates numerous other kinases, transcription factors, and proteins associated with cell growth and survival besides mammalian target of rapamycin (mTOR), disruption of this pathway upstream of mTOR may be more effective than inhibition of TORC1 alone. EXPERIMENTAL DESIGN: To investigate this possibility, the dual PI3K/mTOR inhibitor NVP-BEZ235 was compared with rapamycin in RCC cell lines and xenografts generated from 786-O and A498 cells. RESULTS: Treatment of RCC cell lines with NVP-BEZ235 in vitro resulted in the nuclear translocation of p27, greater reduction in tumor cell proliferation, and more complete suppression of Akt, Mnk-1, eIF4E, and 4EBP-1 phosphorylation and cyclin D1 and hypoxia-inducible factor 2alpha (HIF2alpha) expression than that achieved with rapamycin. The reduction of HIF2alpha levels correlated with reduced HIF activity as determined by luciferase assay. NVP-BEZ235 induced growth arrest in both the 786-O and A498 xenografts that was associated with inhibition of Akt and S6 phosphorylation as well as the induction of apoptosis and reduction in markers of tumor cell proliferation. In contrast, rapamycin induced only minimal growth retardation. CONCLUSION: Dual inhibition of PI3K/mTOR with NVP-BEZ235 induced growth arrest in RCC cell lines both in vitro and in vivo more effectively than inhibition of TORC1 alone. These results provide the rationale for the clinical assessment of agents such as NVP-BEZ235 in patients with advanced RCC. CI - Copyright 2010 AACR. FAU - Cho, Daniel C AU - Cho DC AD - Division of Hematology and Oncology, Beth Israel Deaconess Medical Center, Boston, Massachusetts 02215, USA. dcho1@bidmc.harvard.edu FAU - Cohen, Matthew B AU - Cohen MB FAU - Panka, David J AU - Panka DJ FAU - Collins, Michael AU - Collins M FAU - Ghebremichael, Musie AU - Ghebremichael M FAU - Atkins, Michael B AU - Atkins MB FAU - Signoretti, Sabina AU - Signoretti S FAU - Mier, James W AU - Mier JW LA - eng GR - 1K08CA142890/CA/NCI NIH HHS/United States GR - P50 CA101942/CA/NCI NIH HHS/United States GR - K08 CA142890/CA/NCI NIH HHS/United States GR - P50 CA101942-078709/CA/NCI NIH HHS/United States GR - 2P50CA101942/CA/NCI NIH HHS/United States GR - K08 CA142890-01/CA/NCI NIH HHS/United States PT - Comparative Study PT - Journal Article PT - Research Support, N.I.H., Extramural DEP - 20100706 PL - United States TA - Clin Cancer Res JT - Clinical cancer research : an official journal of the American Association for Cancer Research JID - 9502500 RN - 0 (CRTC2 protein, human) RN - 0 (Enzyme Inhibitors) RN - 0 (Imidazoles) RN - 0 (Multiprotein Complexes) RN - 0 (Phosphoinositide-3 Kinase Inhibitors) RN - 0 (Proteins) RN - 0 (Quinolines) RN - 0 (Transcription Factors) RN - EC 2.7.11.1 (Mechanistic Target of Rapamycin Complex 1) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) RN - RUJ6Z9Y0DT (dactolisib) RN - W36ZG6FT64 (Sirolimus) SB - IM ECI - Clin Cancer Res. 2019 Jul 1;25(13):4194. PMID: 31263033 MH - Animals MH - Carcinoma, Renal Cell/*drug therapy MH - Cell Death/drug effects MH - Cell Line, Tumor MH - Cell Proliferation/drug effects MH - Disease Models, Animal MH - Enzyme Inhibitors/*pharmacology MH - Female MH - Humans MH - Imidazoles/*pharmacology MH - Kidney Neoplasms/*drug therapy MH - Mechanistic Target of Rapamycin Complex 1 MH - Mice MH - Mice, Nude MH - Multiprotein Complexes MH - Neoplasm Transplantation MH - Phosphoinositide-3 Kinase Inhibitors MH - Proteins/antagonists & inhibitors MH - Quinolines/*pharmacology MH - Sirolimus/*pharmacology MH - TOR Serine-Threonine Kinases MH - Transcription Factors/antagonists & inhibitors MH - Xenograft Model Antitumor Assays PMC - PMC2905505 MID - NIHMS212448 EDAT- 2010/07/08 06:00 MHDA- 2010/12/21 06:00 PMCR- 2011/07/15 CRDT- 2010/07/08 06:00 PHST- 2010/07/08 06:00 [entrez] PHST- 2010/07/08 06:00 [pubmed] PHST- 2010/12/21 06:00 [medline] PHST- 2011/07/15 00:00 [pmc-release] AID - 1078-0432.CCR-09-3022 [pii] AID - 10.1158/1078-0432.CCR-09-3022 [doi] PST - ppublish SO - Clin Cancer Res. 2010 Jul 15;16(14):3628-38. doi: 10.1158/1078-0432.CCR-09-3022. Epub 2010 Jul 6.