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Asthma is considered as a general term for various chronic inflammatory diseases of the respiratory tract. Growing evidences have supported that microRNAs were involved in mediating cell proliferation, migration, and other cellular functions. MiR-149 has been found to take part in the development of various cancers. However, whether miR-149 participated in the proliferation and migration of transforming growth factor beta 1 (TGF-β1)-induced airway smooth muscle cells was still unknown. In this study, the expression level of miR-149 in human airway smooth muscle cells (ASMCs) was decreased after TGF-β1 treatment in vitro. Additionally, the over-expression of miR-149 obviously suppressed proliferation and migration in human ASMCs. Besides, we found that overexpression of miR-149 could inhibit the expression of transient receptor potential melastatin 7 (TRPM7) both in protein and gene levels. Furthermore, we demonstrated that miR-149 could inhibit the cell proliferation and migration in human ASMCs by targeting TRPM7 through modulating mitogen-activated protein kinases (MAPKs) signaling pathway. Taken together, we strongly supported that miR-149 might be a key inhibitor of asthma by targeting TRMP7. Therefore, our finding suggests a promising biomarker for the development of further targeted therapies for asthma.

acta biochimica polonica

MiR-149 attenuates the proliferation and migration of TGF-β1-induced airway smooth muscle cells by targeting TRPM7 and affecting downstream MAPK signal pathway