MicroRNA-145 regulates the differentiation of human adipose-derived stem cells to smooth muscle cells via targeting Krüppel-like factor 4

Aji,Kaisaier; Zhang,Yun; Aimaiti,Abudusaimi; Wang,Yujie; Rexiati,Mulati; Azhati,Baihetiya; Tusong,Hamulati; Cui,Lei; Wang,Chen

doi:10.3892/mmr.2017.6478

MicroRNA-145 regulates the differentiation of human adipose-derived stem cells to smooth muscle cells via targeting Krüppel-like factor 4

Authors:
- Kaisaier Aji
- Yun Zhang
- Abudusaimi Aimaiti
- Yujie Wang
- Mulati Rexiati
- Baihetiya Azhati
- Hamulati Tusong
- Lei Cui
- Chen Wang
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Affiliations: Department of Urology, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830054, P.R. China, Department of Orthopedics, Tongji University School of Medicine, Shanghai 200092, P.R. China, Department of Joint Surgery, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830054, P.R. China, Department of Plastic and Reconstructive Surgery, Shanghai 9th People's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200011, P.R. China
Published online on: April 13, 2017 https://doi.org/10.3892/mmr.2017.6478
Pages: 3787-3795

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Abstract

Understanding the molecular mechanisms underlying human adipose-derived stem cell (hASC) differentiation to smooth muscle may contribute to the development of effective therapies for relevant muscle defects, such as bladder wall and urethral defects. A previous study described the differentiation of hASCs to smooth muscle cells (SMCs) by transforming growth factor-β1 (TGF-β1) and bone morphogenetic protein‑4 (BMP4) treatment. The present study investigated whether microRNA-145 (miR‑145) may be involved in the process of hASC differentiation. The expression of miR‑145 was significantly increased during differentiation of ASCs to SMCs. SMC‑specific genes and proteins, including a‑smooth muscle actin (α‑SMA), smooth muscle protein‑22α(SM22α), calponin and myosin heavy chain (SM‑MHC) were upregulated by transfection of a miR‑145 mimic. By contrast, these factors were downregulated following introduction of antisense oligonucleotides. In addition, Krüppel‑like factor 4 (KLF4) levels, which decreased during the differentiation of hASCs, were downregulated when the cells were transfected miR‑145 mimics. Futhermore, inhibition of KLF4 by treatment with short‑interfering‑RNA against KLF4, resulted in increased expression of SMC‑specific genes and proteins. In conclusion, the results of the present study demonstrated that by regulating KLF4, miR‑145 may be involved in regulating smooth muscle differentiation of ASCs induced by TGF‑β1 and BMP4.

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