title: Mechanical stretch regulates microRNA expression profile via NF-κB activation in C2C12 myoblasts.
abstract: MicroRNAs (miRNAs/miRs) and nuclear factor (NF)-κB activation are involved in mechanical stretch-induced skeletal muscle regeneration. However, there are a small number of miRNAs that have been reported to be associated with NF‑κB activation during mechanical stretch-induced myogenesis. In the present study, C2C12 myoblasts underwent cyclic mechanical stretch in vitro, to explore the relationship between miRNA expression and NF‑κB activation during stretch-mediated myoblast proliferation. The results revealed that 10% deformation, 0.125 Hz cyclic mechanical stretch could promote myoblast proliferation. The miRNA expression profile was subsequently altered; miR‑500, ‑1934, ‑31, ‑378, ‑331 and ‑5097 were downregulated, whereas miR‑1941 was upregulated. These miRNAs were all involved in stretch‑mediated myoblast proliferation. Notably, the expression of these miRNAs was reversed following treatment of 0.125 Hz mechanically stretched C2C12 cells with NF‑κB inhibitors, which was accompanied by C2C12 cell growth suppression. Therefore, the present study is the first, to the best of our knowledge, to demonstrate that the NF‑κB‑dependent miRNA profile is associated with mechanical stretch-induced myoblast proliferation.
authors.affiliation: Department of Anatomy, Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Guangzhou, Guangdong 510515, P.R. China.
authors.forename: Wenxi
authors.initials: W
authors.lastname: Hua
authors.affiliation: Department of Neurology, Zhujiang Hospital, Southern Medical University, Guangzhou, Guangdong 510515, P.R. China.
authors.forename: Mahui
authors.initials: M
authors.lastname: Zhang
authors.affiliation: Department of Anatomy, Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Guangzhou, Guangdong 510515, P.R. China.
authors.forename: Yongkui
authors.initials: Y
authors.lastname: Wang
authors.affiliation: Department of Anatomy, Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Guangzhou, Guangdong 510515, P.R. China.
authors.forename: Lei
authors.initials: L
authors.lastname: Yu
authors.affiliation: Department of Anatomy, Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Guangzhou, Guangdong 510515, P.R. China.
authors.forename: Tingting
authors.initials: T
authors.lastname: Zhao
authors.affiliation: Department of Anatomy, Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Guangzhou, Guangdong 510515, P.R. China.
authors.forename: Xiaozhong
authors.initials: X
authors.lastname: Qiu
authors.affiliation: Department of Anatomy, Guangdong Provincial Key Laboratory of Construction and Detection in Tissue Engineering, Guangzhou, Guangdong 510515, P.R. China.
authors.forename: Leyu
authors.initials: L
authors.lastname: Wang
mesh_terms: D000818:Animals; D002453:Cell Cycle; D002460:Cell Line; D049109:Cell Proliferation; D002470:Cell Survival; D016000:Cluster Analysis; D020869:Gene Expression Profiling; D005786:Gene Expression Regulation; D051379:Mice; D035683:MicroRNAs / Q000235:genetics*; D032446:Myoblasts / Q000378:metabolism*; D016328:NF-kappa B / Q000037:antagonists & inhibitors / Q000378:metabolism*; D013314:Stress, Mechanical; D059467:Transcriptome
chemical_list: D035683:MicroRNAs; D016328:NF-kappa B