Open Access

Circular RNA DHTKD1 targets miR‑338‑3p/ETS1 axis to regulate the inflammatory response in human bronchial epithelial cells

  • Authors:
    • Fenhong Qian
    • Shanchuan He
    • Xianmiao Yang
    • Xingxing Chen
    • Siting Zhao
    • Jingzhi Wang
  • View Affiliations

  • Published online on: May 15, 2023     https://doi.org/10.3892/etm.2023.12015
  • Article Number: 316
  • Copyright: © Qian et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Asthma is a chronic inflammatory airway disease and the airway epithelium is involved in airway inflammation and innate immunity. However, whether circular RNA (circRNA) is involved in the pathogenesis of asthma remains unclear. The present study aimed to determine the functions and molecular mechanisms of circRNA targeting dehydrogenase E1 (circDHTKD1) in the inflammation response of human bronchial epithelial cells. BEAS‑2B cells were stimulated with lipopolysaccharide (LPS) to establish a model of in vitro airway inflammation. Cell viability was assessed using Cell Counting Kit‑8 assay. CircDHTKD1 was characterised by nucleocytoplasmic isolation and Sanger sequencing. The RNA expression levels of circDHTKD1, microRNA (miR)‑338‑3p and potential ERK pathway downstream genes were evaluated by reverse transcription‑quantitative polymerase chain reaction. Western blot analysis was performed to measure associated protein levels. The levels of inflammatory cytokines were detected by ELISA. The interaction between circDHTKD1 and miR‑338‑3p was confirmed by dual‑luciferase reporter assay. circDHTKD1 expression was significantly upregulated by LPS treatment, whereas miR‑338‑3p expression was decreased. Furthermore, circDHTKD1 directly targeted miR‑338‑3p, which negatively regulated expression of E26 transformation specific‑1 (ETS1). Inflammatory cytokine and ETS1 expression levels decreased following transfection with small interfering RNA targeting circDHTKD1 or miR‑338‑3p mimics. In addition, co‑transfection with miR‑338‑3p inhibitor reversed the effects caused by circDHTKD1 knockdown. The knockdown of ETS1 in LPS‑induced BEAS‑2B cells resulted in decreased cytokine production and inhibition of the ERK signalling pathway. Overall, these results suggested that the knockdown of circDHTKD1 alleviated the LPS‑induced production of inflammatory cytokines and activation of the ERK pathway in BEAS‑2B cells through the miR‑338‑3p/ETS1 axis. In summary, circDHTKD1 exacerbated LPS‑triggered inflammation responses in BEAS‑2B cells by regulating ETS1 expression by interacting with miR‑338‑3p, suggesting that circDHTKD1 may serve as a potential therapeutic target against asthma.
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July-2023
Volume 26 Issue 1

Print ISSN: 1792-0981
Online ISSN:1792-1015

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Spandidos Publications style
Qian F, He S, Yang X, Chen X, Zhao S and Wang J: Circular RNA DHTKD1 targets miR‑338‑3p/ETS1 axis to regulate the inflammatory response in human bronchial epithelial cells. Exp Ther Med 26: 316, 2023
APA
Qian, F., He, S., Yang, X., Chen, X., Zhao, S., & Wang, J. (2023). Circular RNA DHTKD1 targets miR‑338‑3p/ETS1 axis to regulate the inflammatory response in human bronchial epithelial cells. Experimental and Therapeutic Medicine, 26, 316. https://doi.org/10.3892/etm.2023.12015
MLA
Qian, F., He, S., Yang, X., Chen, X., Zhao, S., Wang, J."Circular RNA DHTKD1 targets miR‑338‑3p/ETS1 axis to regulate the inflammatory response in human bronchial epithelial cells". Experimental and Therapeutic Medicine 26.1 (2023): 316.
Chicago
Qian, F., He, S., Yang, X., Chen, X., Zhao, S., Wang, J."Circular RNA DHTKD1 targets miR‑338‑3p/ETS1 axis to regulate the inflammatory response in human bronchial epithelial cells". Experimental and Therapeutic Medicine 26, no. 1 (2023): 316. https://doi.org/10.3892/etm.2023.12015