PMID- 29848693 OWN - NLM STAT- MEDLINE DCOM- 20180611 LR - 20211204 IS - 1791-7530 (Electronic) IS - 0250-7005 (Linking) VI - 38 IP - 6 DP - 2018 Jun TI - Silencing lnc-ASAH2B-2 Inhibits Breast Cancer Cell Growth via the mTOR Pathway. PG - 3427-3434 LID - 10.21873/anticanres.12611 [doi] AB - BACKGROUND/AIM: Persistent activation of the phosphatidylinositol-3-kinase/protein kinase B/mammalian target of rapamycin (mTOR) pathway is an important mechanism in resistance of breast cancer to endocrine therapy. Although everolimus has potent inhibitory effects on the mTOR pathway, it has demonstrated only modest clinical activity as a single agent. Whether long noncoding (lnc) RNA is involved in everolimus resistance is unknown. MATERIALS AND METHODS: Cell viability, colony formation and cell proliferation experiments were used to measure the effects of long noncoding RNA N-acylsphingosine amidohydrolase 2B-2 (lnc-ASAH2B-2) knockdown in BT474 and MCF7 breast cancer cells. RESULTS: lnc-ASAH2B-2 was up-regulated by everolimus in cells with and without serum, and reduction of lnc-ASAH2B-2 expression was able to inhibit proliferation of BT474 and MCF7 cells. CONCLUSION: lnc-ASAH2B-2 was up-regulated after everolimus exposure and efficiently regulated breast cancer cell growth by activating the mTOR pathway, which may reduce the effect of everolimus, providing evidence that lnc-ASAH2B-2 might be a new therapeutic target for breast cancer. CI - Copyright(c) 2018, International Institute of Anticancer Research (Dr. George J. Delinasios), All rights reserved. FAU - Li, Jingjing AU - Li J AD - Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, P.R. China. AD - Breast Tumor Center, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, P.R. China. FAU - Zhang, Jing AU - Zhang J AD - Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, P.R. China. AD - Anesthesiology Department, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, P.R. China. FAU - Jin, Liang AU - Jin L AD - Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, P.R. China. AD - Breast Tumor Center, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, P.R. China. FAU - Deng, Heran AU - Deng H AD - Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, P.R. China. AD - Breast Tumor Center, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, P.R. China. FAU - Wu, Jiannan AU - Wu J AD - Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, P.R. China wujiann3@mail.sysu.edu.cn. AD - Breast Tumor Center, Sun Yat-Sen Memorial Hospital, Sun Yat-Sen University, Guangzhou, P.R. China. LA - eng PT - Journal Article PL - Greece TA - Anticancer Res JT - Anticancer research JID - 8102988 RN - 0 (Antineoplastic Agents) RN - 0 (RNA, Long Noncoding) RN - 9HW64Q8G6G (Everolimus) RN - EC 2.7.1.1 (MTOR protein, human) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) SB - IM MH - Antineoplastic Agents/pharmacology MH - Breast Neoplasms/genetics/pathology MH - Cell Line, Tumor MH - Cell Proliferation/drug effects/*genetics MH - Everolimus/pharmacology MH - Female MH - Gene Expression Profiling/methods MH - Gene Expression Regulation, Neoplastic/drug effects MH - Humans MH - MCF-7 Cells MH - *RNA Interference MH - RNA, Long Noncoding/*genetics MH - Signal Transduction/drug effects/*genetics MH - TOR Serine-Threonine Kinases/*genetics MH - Up-Regulation/drug effects OTO - NOTNLM OT - Breast cancer OT - everolimus OT - lnc-ASAH2B-2 OT - long noncoding RNA OT - therapeutic target EDAT- 2018/06/01 06:00 MHDA- 2018/06/12 06:00 CRDT- 2018/06/01 06:00 PHST- 2018/04/01 00:00 [received] PHST- 2018/05/03 00:00 [revised] PHST- 2018/05/09 00:00 [accepted] PHST- 2018/06/01 06:00 [entrez] PHST- 2018/06/01 06:00 [pubmed] PHST- 2018/06/12 06:00 [medline] AID - 38/6/3427 [pii] AID - 10.21873/anticanres.12611 [doi] PST - ppublish SO - Anticancer Res. 2018 Jun;38(6):3427-3434. doi: 10.21873/anticanres.12611.