1. Exosomal <scp>LINC01005</scp> derived from oxidized low‐density lipoprotein‐treated endothelial cells regulates vascular smooth muscle cell phenotypic switch
- Author
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Zhiming Gao, Jiamin Zhou, Dasong Yi, Yaofu Zheng, Xiaoping Peng, Xiaoliang Hu, Zhiliang Zhang, Guoqiu Ying, and Tong Wen
- Subjects
0301 basic medicine ,Vascular smooth muscle ,Myocytes, Smooth Muscle ,Clinical Biochemistry ,Cell ,Kruppel-Like Transcription Factors ,Exosomes ,Biochemistry ,Muscle, Smooth, Vascular ,Umbilical vein ,Kruppel-Like Factor 4 ,03 medical and health sciences ,0302 clinical medicine ,Western blot ,Downregulation and upregulation ,Cell Movement ,Human Umbilical Vein Endothelial Cells ,medicine ,Humans ,Cell Proliferation ,medicine.diagnostic_test ,Chemistry ,Cell growth ,Endothelial Cells ,General Medicine ,musculoskeletal system ,Microvesicles ,Cell biology ,Lipoproteins, LDL ,MicroRNAs ,Phenotype ,030104 developmental biology ,medicine.anatomical_structure ,Gene Expression Regulation ,KLF4 ,030220 oncology & carcinogenesis ,cardiovascular system ,Molecular Medicine ,RNA, Long Noncoding - Abstract
Phenotype switch of vascular smooth muscle cells (VSMCs) plays an important role in the development of atherosclerosis (AS). Endothelial cells can regulate VSMC phenotypic switch by secreting exosomes, crucial mediators of intracellular communication. This study aimed to determine whether exosomal LINC01005 from oxidized low-density lipoprotein (ox-LDL)-treated human umbilical vein endothelial cells (HUVECs) plays a role in regulating VSMC phenotypic switch and to validate the underlying molecular mechanism. Exosomes were extracted from ox-LDL-treated HUVECs (ox-LDL-Exo) and then administered into VSMCs. VSMC phenotypic switch was assessed by determining VSMC phenotypic markers using western blot. VSMC cell proliferation and migration were evaluated by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay and wound healing assay, respectively. The interaction between miR-128-3p and LINC01005 or Krüppel-like factor 4 (KLF4) was analyzed by luciferase reporter assay. ox-LDL-Exo contained high expression of LINC01005. Inhibition of LINC01005 expression in ox-LDL-Exo abrogated the ox-LDL-Exo-induced VSMC phenotypic switch, proliferation, and migration. Furthermore, LINC01005 acted as a sponge of miR-128-3p to upregulate KLF4 expression. Moreover, miR-128-3p overexpression and KLF4 silencing in VSMCs attenuated the ox-LDL-Exo-induced VSMC phenotypic switch, proliferation, and migration. Collectively, exosomal LINC01005 from ox-LDL-treated HUVECs promotes VSMC phenotype switch, proliferation, and migration by regulating the miR-128-3p/KLF4 axis.
- Published
- 2020