PMID- 30771617 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20200929 IS - 2162-2531 (Print) IS - 2162-2531 (Electronic) IS - 2162-2531 (Linking) VI - 14 DP - 2019 Mar 1 TI - ERK Inhibitor Enhances Everolimus Efficacy through the Attenuation of dNTP Pools in Renal Cell Carcinoma. PG - 550-561 LID - S2162-2531(19)30004-6 [pii] LID - 10.1016/j.omtn.2019.01.001 [doi] AB - The clinical efficiency of everolimus, an mammalian target of rapamycin (mTOR) inhibitor, is palliative as sequential or second-line therapy for renal cell carcinoma (RCC). However, the limited response of everolimus in RCC remains uncertain. In the present study, everolimus-resistant RCC models were established to understand the mechanisms and to seek combination approaches. Consequently, the activation of ERK was found to contribute toward everolimus-acquired resistance and poor prognosis in patients with RCC. In addition, the efficacy and mechanism of combination treatment underlying RCC using everolimus and ERK inhibitors was investigated. The ERK inhibitor in combination with everolimus synergistically inhibited the proliferation of RCC cells by arresting the cell cycle in the G1 phase. The combination treatment markedly attenuated the deoxyribonucleoside triphosphate (dNTP) pools by downregulating the mRNA expression of RRM1 and RRM2 through E2F1. The overexpression of E2F1 or supplementation of dNTP rescued the anti-proliferation activity of the everolimus-SCH772984 combination. The antitumor efficacy of combination therapy was reiterated in RCC xenograft models. Thus, the current findings provided evidence that the everolimus-ERK inhibitor combination is a preclinical therapeutic strategy for RCC. CI - Copyright (c) 2019 The Authors. Published by Elsevier Inc. All rights reserved. FAU - Zou, Yun AU - Zou Y AD - Department of Urology and Andrology, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200011, China. FAU - Li, Wenzhi AU - Li W AD - Department of Urology and Andrology, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200011, China. FAU - Zhou, Juan AU - Zhou J AD - Department of Urology and Andrology, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200011, China. FAU - Zhang, Jin AU - Zhang J AD - Department of Urology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China. FAU - Huang, Yiran AU - Huang Y AD - Department of Urology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China. Electronic address: hyrrenji2@aliyun.com. FAU - Wang, Zhong AU - Wang Z AD - Department of Urology and Andrology, Shanghai Ninth People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200011, China. Electronic address: zhongwang2000@sina.com. LA - eng PT - Journal Article DEP - 20190110 PL - United States TA - Mol Ther Nucleic Acids JT - Molecular therapy. Nucleic acids JID - 101581621 PMC - PMC6374702 OTO - NOTNLM OT - ERK inhibitor OT - dNTP OT - everolimus OT - renal cell carcinoma OT - ribonucleotide reductase EDAT- 2019/02/17 06:00 MHDA- 2019/02/17 06:01 PMCR- 2019/01/10 CRDT- 2019/02/17 06:00 PHST- 2018/09/14 00:00 [received] PHST- 2019/01/01 00:00 [revised] PHST- 2019/01/01 00:00 [accepted] PHST- 2019/02/17 06:00 [pubmed] PHST- 2019/02/17 06:01 [medline] PHST- 2019/02/17 06:00 [entrez] PHST- 2019/01/10 00:00 [pmc-release] AID - S2162-2531(19)30004-6 [pii] AID - 10.1016/j.omtn.2019.01.001 [doi] PST - ppublish SO - Mol Ther Nucleic Acids. 2019 Mar 1;14:550-561. doi: 10.1016/j.omtn.2019.01.001. Epub 2019 Jan 10.