Open Access

Treadmill exercise influences the microRNA profiles in the bone tissues of mice

  • Authors:
    • Huan Yang
    • Zhen Cao
    • Yang Wang
    • Jiahui Wang
    • Jintao Gao
    • Biao Han
    • Fangmei Yu
    • Yixiong Qin
    • Yong Guo
  • View Affiliations

  • Published online on: July 19, 2021     https://doi.org/10.3892/etm.2021.10467
  • Article Number: 1035
  • Copyright: © Yang et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

As an important regulator involved in cell activity, microRNAs (miRNAs) are important in the process of exercise influencing bone metabolism. The present study aimed to detect and select differentially expressed miRNAs in the bone tissues of mice trained on a treadmill, predict the target genes of these differentially expressed miRNAs and lay a foundation for exploring the effect of treadmill training on bone metabolism through miRNAs. In this experiment, after the mice were trained on a treadmill for 8 weeks, the mechanical properties of mouse femur bone were assessed, and the alkaline phosphatase (ALP) activity and osteocalcin (OCN) protein levels of the bone were assayed. miRNA microarray and reverse transcription‑quantitative (RT‑q)PCR were performed to select and validate differentially expressed miRNAs in the bone, and the target genes of these miRNAs were predicted with bioinformatics methods. In addition, the differentially expressed miRNAs in the bone tissues were compared with those in mechanically strained osteocytes in vitro. Treadmill training improved the mechanical properties of the femur bones of mice, and elevated the ALP activity and OCN protein level in the bone. In addition, 122 differentially expressed miRNAs were detected in the bone, of which nine were validated via RT‑qPCR. Among the target genes of these differentially expressed miRNAs, certain candidates were involved in bone metabolism. A total of eight miRNAs were differentially expressed in both bone tissue and osteocytes, exhibiting the same expression trends, and various target genes of these eight miRNAs were also involved in bone metabolism. Treadmill training resulted in altered miRNA expression profiles in the bones of mice (mainly in osteocytes) and the differentially expressed miRNAs may serve important roles in regulating bone metabolism and osteogenic differentiation.

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September-2021
Volume 22 Issue 3

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

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Spandidos Publications style
Yang H, Cao Z, Wang Y, Wang J, Gao J, Han B, Yu F, Qin Y and Guo Y: Treadmill exercise influences the microRNA profiles in the bone tissues of mice. Exp Ther Med 22: 1035, 2021
APA
Yang, H., Cao, Z., Wang, Y., Wang, J., Gao, J., Han, B. ... Guo, Y. (2021). Treadmill exercise influences the microRNA profiles in the bone tissues of mice. Experimental and Therapeutic Medicine, 22, 1035. https://doi.org/10.3892/etm.2021.10467
MLA
Yang, H., Cao, Z., Wang, Y., Wang, J., Gao, J., Han, B., Yu, F., Qin, Y., Guo, Y."Treadmill exercise influences the microRNA profiles in the bone tissues of mice". Experimental and Therapeutic Medicine 22.3 (2021): 1035.
Chicago
Yang, H., Cao, Z., Wang, Y., Wang, J., Gao, J., Han, B., Yu, F., Qin, Y., Guo, Y."Treadmill exercise influences the microRNA profiles in the bone tissues of mice". Experimental and Therapeutic Medicine 22, no. 3 (2021): 1035. https://doi.org/10.3892/etm.2021.10467