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Melatonin modulates airway smooth muscle cell phenotype by targeting the STAT3/Akt/GSK-3β pathway in experimental asthma

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Abstract

Among the troika of clinicopathologic features of asthma, airway remodelling has gained sufficient attention for its contribution to progressive airway narrowing. Much effort has been directed at the management of airway smooth muscle cells (ASMCs), but few attempts have proven to prevent the progression of remodelling. Recently, accumulating data have shown the anti-inflammatory/anti-proliferative potency of melatonin (a crucial neurohormone involved in many physiological and pathological processes) in diverse cells. However, no evidence has confirmed its effect on ASMCs. The present study investigates the benefits of melatonin in asthma, with an emphasis on airway remodelling. The results indicated that melatonin significantly attenuated airway hyperresponsiveness (AHR), inflammation and remodelling in a house dust mite (HDM) model. Melatonin markedly alleviated goblet cell hyperplasia/metaplasia, collagen deposition and airway smooth muscle hyperplasia/hypertrophy, implying the achievement of remodelling remission. The data obtained in vitro further revealed that melatonin notably inhibited ASMCs proliferation, VEGF synthesis and cell migration induced by PDGF, which might depend on STAT3 signalling. Moreover, melatonin remarkably relieved ASMCs contraction and reversed ASMCs phenotype switching induced by TGF-β, probably via the Akt/GSK-3β pathway. Altogether, our findings illustrated for the first time that melatonin improves asthmatic airway remodelling by balancing the phenotypic proportions of ASMCs, thus highlighting a novel purpose for melatonin as a potent option for the management of asthma.

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Funding

This work was supported by the Jiangsu Province Special Program for Young Medical Talent (QNRC2016599), the National Natural Science Foundation of China (NSFC) (Grant No. 81700028), the Changzhou International Science and Technology Collaboration Program (CZ20110021) and the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD, JX10231802).

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Correspondence to Mao Huang or Xiaoning Zeng.

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The authors declare that there are no conflicts of interest.

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All procedures performed in the studies involving animals were approved by the Animal Ethical and Welfare Committee of Nanjing Medical University (permit number IACUC-1709030).

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Yu, Q., Yu, X., Zhong, X. et al. Melatonin modulates airway smooth muscle cell phenotype by targeting the STAT3/Akt/GSK-3β pathway in experimental asthma. Cell Tissue Res 380, 129–142 (2020). https://doi.org/10.1007/s00441-019-03148-x

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  • DOI: https://doi.org/10.1007/s00441-019-03148-x

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