PMID- 29943847 OWN - NLM STAT- MEDLINE DCOM- 20191009 LR - 20210821 IS - 1097-4644 (Electronic) IS - 0730-2312 (Linking) VI - 119 IP - 10 DP - 2018 Nov TI - Pathological cyclic strain promotes proliferation of vascular smooth muscle cells via the ACTH/ERK/STAT3 pathway. PG - 8260-8270 LID - 10.1002/jcb.26839 [doi] AB - Abnormal proliferation of vascular smooth muscle cells (VSMCs) is closely related to hyperplasia in hypertension. Our previous study suggested that adrenocorticotropic hormone (ACTH) is mechano-responsive and may regulate VSMC proliferation. However, the molecular mechanism of VSMC abnormal proliferation induced by conditions of high cyclic strain, especially the role of ACTH in this process, is unclear. Our results revealed that ACTH and its specific receptor melanocortin receptor type 2 (MC2R) were highly expressed in hypertensive rat models. Furthermore, it was demonstrated that the expression of ACTH and MC2R was up-regulated when exposed to high cyclic strain in vitro, accompanied by abnormal proliferation of VSMCs. Next, it was proved that ACTH-dependent cell proliferation was related to the phosphorylation of extracellular regulated protein kinases (ERK) and signal transducer and activator of transcription 3 (STAT3). The study also found that ACTH could promote dimerization and glycosylation of melanocortin 2 receptor accessory protein (MRAP), which had a significant effect on MC2R membrane localization and signal activation. When VSMCs were treated with PD98059, a mitogen-activated protein kinase (MAP kinase) cascade antagonist, it was determined that phosphorylation of STAT3 at Ser727 was dependent on ERK phosphorylation. In summary, these data demonstrated that the abnormal proliferation of VSMCs induced by conditions of high cyclic strain is in part attributed to ACTH and its receptor MC2R. Identifying the mechanism of ACTH-dependent proliferation of VSMCs may help to provide new therapeutic targets for hypertension. CI - (c) 2018 Wiley Periodicals, Inc. FAU - Tang, Xia AU - Tang X AD - Institute of Mechanobiology and Medical Engineering, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China. FAU - Liu, Yanyan AU - Liu Y AD - Institute of Mechanobiology and Medical Engineering, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China. FAU - Xiao, Qian AU - Xiao Q AD - Institute of Mechanobiology and Medical Engineering, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China. FAU - Yao, Qingping AU - Yao Q AD - Institute of Mechanobiology and Medical Engineering, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China. FAU - Allen, Molly AU - Allen M AD - Department of Bioengineering, University of California, San Diego, California. FAU - Wang, Yingxiao AU - Wang Y AD - Department of Bioengineering, University of California, San Diego, California. FAU - Gao, Lizhi AU - Gao L AD - Institute of Mechanobiology and Medical Engineering, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China. FAU - Qi, Yingxin AU - Qi Y AD - Institute of Mechanobiology and Medical Engineering, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China. FAU - Zhang, Ping AU - Zhang P AUID- ORCID: 0000-0002-4873-4383 AD - Institute of Mechanobiology and Medical Engineering, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China. AD - National Experimental Teaching Demonstration of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20180626 PL - United States TA - J Cell Biochem JT - Journal of cellular biochemistry JID - 8205768 RN - 0 (Flavonoids) RN - 0 (Receptor, Melanocortin, Type 2) RN - 0 (STAT3 Transcription Factor) RN - 0 (Stat3 protein, rat) RN - 9002-60-2 (Adrenocorticotropic Hormone) RN - EC 2.7.11.24 (Mitogen-Activated Protein Kinase 1) RN - EC 2.7.11.24 (Mitogen-Activated Protein Kinase 3) RN - SJE1IO5E3I (2-(2-amino-3-methoxyphenyl)-4H-1-benzopyran-4-one) SB - IM MH - Adrenocorticotropic Hormone/*genetics/metabolism MH - Animals MH - Biomechanical Phenomena MH - Cell Proliferation/drug effects MH - Disease Models, Animal MH - Female MH - Flavonoids/pharmacology MH - Gene Expression Regulation MH - Hypertension/*genetics/metabolism/physiopathology MH - *Mechanotransduction, Cellular MH - Mitogen-Activated Protein Kinase 1/antagonists & inhibitors/genetics/metabolism MH - Mitogen-Activated Protein Kinase 3/genetics/metabolism MH - Muscle, Smooth, Vascular/metabolism/pathology MH - Myocytes, Smooth Muscle/drug effects/*metabolism/pathology MH - Phosphorylation/drug effects MH - Pregnancy MH - Primary Cell Culture MH - Rats MH - Receptor, Melanocortin, Type 2/*genetics/metabolism MH - STAT3 Transcription Factor/*genetics/metabolism MH - Stress, Mechanical OTO - NOTNLM OT - ACTH OT - ERK OT - STAT3 OT - VSMC OT - cyclic strain OT - proliferation EDAT- 2018/06/27 06:00 MHDA- 2019/10/11 06:00 CRDT- 2018/06/27 06:00 PHST- 2017/11/20 00:00 [received] PHST- 2018/03/09 00:00 [accepted] PHST- 2018/06/27 06:00 [pubmed] PHST- 2019/10/11 06:00 [medline] PHST- 2018/06/27 06:00 [entrez] AID - 10.1002/jcb.26839 [doi] PST - ppublish SO - J Cell Biochem. 2018 Nov;119(10):8260-8270. doi: 10.1002/jcb.26839. Epub 2018 Jun 26.