PMID- 29524402 OWN - NLM STAT- MEDLINE DCOM- 20180503 LR - 20220330 IS - 1090-2104 (Electronic) IS - 0006-291X (Linking) VI - 498 IP - 3 DP - 2018 Apr 6 TI - Ghrelin promotes human non-small cell lung cancer A549 cell proliferation through PI3K/Akt/mTOR/P70S6K and ERK signaling pathways. PG - 616-620 LID - S0006-291X(18)30505-9 [pii] LID - 10.1016/j.bbrc.2018.03.031 [doi] AB - Ghrelin is a gastric acyl-peptide that plays an important role in cell proliferation. In the present study, we explored the role of ghrelin in A549 cell proliferation and the possible molecular mechanisms. We found that ghrelin promotes A549 cell proliferation, knockdown of the growth hormone secretagogue receptor (GHSR) attenuated A549 cell proliferation caused by ghrelin. Ghrelin induced the rapid phosphorylation of phosphatidylinositol 3-kinase (PI3K), Akt, ERK, mammalian target of rapamycin (mTOR) and P70S6K. PI3K inhibitor (LY 294002), ERK inhibitor (PD98059) and mTOR inhibitor (Rapamycin) inhibited ghrelin-induced A549 cell proliferation. Moreover, GHSR siRNA inhibited phosphorylation of PI3K, Akt, ERK, mTOR and P70S6K induced by ghrelin. Akt and mTOR/P70S6K phosphorylation was inhibited by LY 294002 but not by PD98059. These results indicate that ghrelin promotes A549 cell proliferation via GHSR-dependent PI3K/Akt/mTOR/P70S6K and ERK signaling pathways. CI - Copyright (c) 2018 Elsevier Inc. All rights reserved. FAU - Zhu, Jianhua AU - Zhu J AD - Laboratory of Clinical Immunology, Wuhan No. 1 Hospital, Tongji Medical College, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, PR China. Electronic address: zhujh621@163.com. FAU - Yao, Jianfeng AU - Yao J AD - Quanzhou Maternal and Child Health Care Hospital, Quanzhou, Fujian, PR China. FAU - Huang, Rongfu AU - Huang R AD - The Second Affiliated Hospital, Fujian Medical University, Quanzhou, Fujian, PR China. FAU - Wang, Yueqin AU - Wang Y AD - Laboratory of Clinical Immunology, Wuhan No. 1 Hospital, Tongji Medical College, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, PR China. FAU - Jia, Min AU - Jia M AD - Laboratory of Clinical Immunology, Wuhan No. 1 Hospital, Tongji Medical College, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, PR China. FAU - Huang, Yan AU - Huang Y AD - Laboratory of Clinical Immunology, Wuhan No. 1 Hospital, Tongji Medical College, Huazhong University of Science and Technology (HUST), Wuhan, Hubei, PR China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20180310 PL - United States TA - Biochem Biophys Res Commun JT - Biochemical and biophysical research communications JID - 0372516 RN - 0 (Ghrelin) RN - 0 (Receptors, Ghrelin) RN - EC 2.7.1.1 (MTOR protein, human) RN - EC 2.7.1.137 (Phosphatidylinositol 3-Kinase) RN - EC 2.7.11.1 (Proto-Oncogene Proteins c-akt) RN - EC 2.7.11.1 (Ribosomal Protein S6 Kinases, 70-kDa) RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) SB - IM MH - A549 Cells MH - Carcinoma, Non-Small-Cell Lung/*metabolism/pathology MH - *Cell Proliferation MH - Ghrelin/*metabolism MH - Humans MH - Lung Neoplasms/*metabolism/pathology MH - MAP Kinase Signaling System MH - Phosphatidylinositol 3-Kinase/metabolism MH - Phosphorylation MH - Proto-Oncogene Proteins c-akt/metabolism MH - Receptors, Ghrelin/metabolism MH - Ribosomal Protein S6 Kinases, 70-kDa/metabolism MH - *Signal Transduction MH - TOR Serine-Threonine Kinases/metabolism OTO - NOTNLM OT - A549 cell OT - ERK OT - GHSR OT - Ghrelin OT - PI3K/Akt/mTOR/P70S6K OT - Proliferation EDAT- 2018/03/11 06:00 MHDA- 2018/05/04 06:00 CRDT- 2018/03/11 06:00 PHST- 2018/03/02 00:00 [received] PHST- 2018/03/06 00:00 [accepted] PHST- 2018/03/11 06:00 [pubmed] PHST- 2018/05/04 06:00 [medline] PHST- 2018/03/11 06:00 [entrez] AID - S0006-291X(18)30505-9 [pii] AID - 10.1016/j.bbrc.2018.03.031 [doi] PST - ppublish SO - Biochem Biophys Res Commun. 2018 Apr 6;498(3):616-620. doi: 10.1016/j.bbrc.2018.03.031. Epub 2018 Mar 10.