Journal
IN VITRO CELLULAR & DEVELOPMENTAL BIOLOGY-ANIMAL
Volume 53, Issue 3, Pages 265-271Publisher
SPRINGER
DOI: 10.1007/s11626-016-0109-y
Keywords
Bovine; MSCs; MicroRNA-143; IGFBP5; Myogenic differentiation
Categories
Funding
- National Natural Science Foundation of China [31201021]
- Training Programs of Innovation and Entrepreneurship for Undergraduates of Tianjin [201510061006]
- 131 Innovative Talents Cultivation Project in Tianjin [J01005021104]
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Development of skeletal muscle is a complicated biological process regulated by various regulation factors and signal pathways. MicroRNAs (miRNAs) are novel gene regulators that control muscle cell development. microRNA-143 (miR-143) is highly expressed in skeletal muscle, and we found that miR-143 level is significantly increased during bovine skeletal muscle satellite cells (MSCs) differentiation process through microarray analysis and qRT-PCR detection. However, the function of miR-143 in bovine muscle development remained unclear. In our work, the functions of miR-143 in bovine MSCs myogenic differentiation were investigated. We discovered that IGFBP5 is directly regulated by miR-143 using a dual-luciferase reporter assay. Overexpression of miR-143 led to decreased level of IGFBP5 protein and restrained cell proliferation and differentiation, while downregulation of miR-143 resulted in increased levels of IGFBP5 protein and restrained cell proliferation but improved differentiation. IGFBP5, an important component of IGF signaling pathway, contributes greatly to bovine muscle cell development. A mechanism that miR-143 can regulate the proliferation and differentiation of bovine MSCs through changing expression of IGFBP5 was elucidated by our study.
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