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NEAT1 silencing alleviates pulmonary arterial smooth muscle cell migration and proliferation under hypoxia through regulation of miR‑34a‑5p/KLF4 in vitro .

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  • Additional Information
    • Source:
      Publisher: D. A. Spandidos Country of Publication: Greece NLM ID: 101475259 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1791-3004 (Electronic) Linking ISSN: 17912997 NLM ISO Abbreviation: Mol Med Rep Subsets: MEDLINE
    • Publication Information:
      Original Publication: Athens, Greece : D. A. Spandidos
    • Subject Terms:
      Cell Movement/*genetics ; Cell Proliferation/*genetics ; Hypertension, Pulmonary/*metabolism ; Hypoxia/*metabolism ; Kruppel-Like Factor 4/*metabolism ; Pulmonary Artery/*metabolism ; RNA, Long Noncoding/*genetics ; RNA, Long Noncoding/*metabolism; Adult ; Cell Hypoxia/genetics ; Cell Hypoxia/physiology ; Female ; Humans ; Hypertension, Pulmonary/genetics ; Hypertension, Pulmonary/pathology ; Kruppel-Like Factor 4/genetics ; Male ; MicroRNAs/genetics ; Middle Aged ; Myocytes, Smooth Muscle/metabolism ; Pulmonary Arterial Hypertension ; Pulmonary Artery/pathology ; Signal Transduction ; Young Adult
    • Abstract:
      Pulmonary arterial hypertension (PAH) is a severe vascular disease that adversely affects patient health and can be life threatening. The present study aimed to investigate the detailed role of nuclear paraspeckle assembly transcript 1 (NEAT1) in PAH. Using RT‑qPCR, the expression levels of NEAT1, microRNA (miR)‑34a‑5p, and Krüppel‑like factor 4 (KLF4) were detected in both hypoxia‑treated pulmonary arterial smooth muscle cells (PASMCs) and serum from PAH patients. Then, the interactions among miR‑34a‑5p, NEAT1, and KLF4 were evaluated by dual‑luciferase reporter assay. The detailed role of the NEAT1/miR‑34a‑5p/KLF4 axis in PAH pathogenesis was further explored using MTT, Transwell, and western blot assays. The results revealed that NEAT1 targeted miR‑34a‑5p and miR‑34a‑5p targeted KLF4. In hypoxia‑treated PASMCs and serum from PAH patients, high NEAT1 and KLF4 expression levels and low miR‑34a‑5p expression were observed. The proliferation and migration of hypoxia‑treated PASMCs were reduced by transfection with sh‑NEAT1 or miR‑34a‑5p mimics. The suppressive effects of NEAT1 knockdown on the proliferation and migration of hypoxia‑treated PASMCs were reversed by knock down of miR‑34a‑5p expression and increased KLF4 expression. NEAT1 was not only highly expressed in the serum of PAH patients but its silencing also alleviated PAH by regulating miR‑34a‑5p/KLF4 in vitro . The present study highlighted a potential new therapeutic target and diagnostic biomarker for PAH.
    • Contributed Indexing:
      Keywords: Krüppel‑like factor 4; long non‑coding RNA nuclear paraspeckle assembly transcript 1; microRNA‑34a‑5p; pulmonary arterial hypertension
    • Accession Number:
      0 (KLF4 protein, human)
      0 (Kruppel-Like Factor 4)
      0 (MicroRNAs)
      0 (NEAT1 long non-coding RNA, human)
      0 (RNA, Long Noncoding)
    • Publication Date:
      Date Created: 20210901 Date Completed: 20220106 Latest Revision: 20220106
    • Publication Date:
      20250114
    • Accession Number:
      10.3892/mmr.2021.12389
    • Accession Number:
      34468014