title: Knockdown of connexin 43 attenuates balloon injury-induced vascular restenosis through the inhibition of the proliferation and migration of vascular smooth muscle cells.
abstract: Coronary artery disease (CAD) or atherosclerotic heart disease is one of the most common types of cardiovascular disease. Although percutaneous coronary intervention [PCI or percutaneous transluminal coronary angioplasty (PTCA)] is a mature, well-established technique used to treat atherosclerotic heart disease, its long‑term therapeutic effects are compromised by a high incidence of vascular restenosis (RS) following angioplasty. In our previous study, we found that the principal gap junction protein, connexin 43 (Cx43), in vascular smooth muscle cells (VSMCs) was involved in the development of vascular RS following angioplasty-induced balloon injury. However, the exact role action of Cx43 in vascular RS remains unclear. In the present study, we aimed to further examine whether the knockdown of Cx43 attenuates the development of vascular RS through the inhibition of the proliferation and migration of VSMCs. We found that the use of a lentiviral vector expressing shRNA targeting Cx43 (Cx43‑RNAi-LV) efficiently silenced the mRNA and protein expression of Cx43 in cultured VSMCs. In addition, MTT and Transwell assays were used to examined the proliferation and migration of the VSMCs, respectively. The results revealed that the knockdown of Cx43 by Cx43-RNAi-LV at a multiplicity of infection (MOI) of 100 significantly inhibited the proliferation and migration of the VSMCs in vitro. Notably, the knockdown of Cx43 also effectively attenuated the development of vascular RS and intimal hyperplasia following balloon injury in vivo. Taken together, our data suggest that Cx43 is involved in the development of vascular RS and intimal hyperplasia through the regulation of the proliferation and migration of VSMCs. Thus, the present study provides new insight into the pathogenesis of vascular RS, and suggests that further comfirms that Cx43 may well be a novel potential pharmacological target for preventing vascular RS following PCI.
authors.affiliation: Department of Pharmacology, School of Pharmaceutical Science, Nanchang University, Nanchang, Jiangxi 330006, P.R. China.
authors.forename: Xiao-Jian
authors.initials: XJ
authors.lastname: Han
authors.affiliation: Department of Pharmacology, School of Pharmaceutical Science, Nanchang University, Nanchang, Jiangxi 330006, P.R. China.
authors.forename: Dan
authors.initials: D
authors.lastname: He
authors.affiliation: Department of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215000, P.R. China.
authors.forename: Liang-Jing
authors.initials: LJ
authors.lastname: Xu
authors.affiliation: Department of Pharmacology, School of Pharmaceutical Science, Nanchang University, Nanchang, Jiangxi 330006, P.R. China.
authors.forename: Min
authors.initials: M
authors.lastname: Chen
authors.affiliation: Department of Pharmacology, School of Pharmaceutical Science, Nanchang University, Nanchang, Jiangxi 330006, P.R. China.
authors.forename: Yi-Qi
authors.initials: YQ
authors.lastname: Wang
authors.affiliation: Department of Neurosurgery, The First Affiliated Hospital, Nanchang University, Nanchang, Jiangxi 330006, P.R. China.
authors.forename: Jiu-Geng
authors.initials: JG
authors.lastname: Feng
authors.affiliation: Department of Neurosurgery, The First Affiliated Hospital, Nanchang University, Nanchang, Jiangxi 330006, P.R. China.
authors.forename: Min-Jun
authors.initials: MJ
authors.lastname: Wei
authors.affiliation: Department of Neurosurgery, The First Affiliated Hospital, Nanchang University, Nanchang, Jiangxi 330006, P.R. China.
authors.forename: Tao
authors.initials: T
authors.lastname: Hong
authors.affiliation: Department of Pharmacology, School of Pharmaceutical Science, Nanchang University, Nanchang, Jiangxi 330006, P.R. China.
authors.forename: Li-Ping
authors.initials: LP
authors.lastname: Jiang
mesh_terms: D015906:Angioplasty, Balloon, Coronary / Q000009:adverse effects*; D000818:Animals; D002465:Cell Movement / Q000235:genetics*; D049109:Cell Proliferation / Q000235:genetics*; D002478:Cells, Cultured; D018031:Connexin 43 / Q000235:genetics*; D017630:Connexins / Q000235:genetics; D003324:Coronary Artery Disease / Q000235:genetics / Q000473:pathology; D004730:Endothelium, Vascular / Q000502:physiology; D006965:Hyperplasia / Q000235:genetics / Q000473:pathology; D008297:Male; D009131:Muscle, Smooth, Vascular / Q000502:physiology; D032389:Myocytes, Smooth Muscle / Q000502:physiology; D034622:RNA Interference / Q000502:physiology; D012333:RNA, Messenger / Q000235:genetics; D034741:RNA, Small Interfering / Q000235:genetics; D051381:Rats; D017207:Rats, Sprague-Dawley
chemical_list: D018031:Connexin 43; D017630:Connexins; C580592:Gja1 protein, rat; D012333:RNA, Messenger; D034741:RNA, Small Interfering