Protective role of microRNA-29a in denatured dermis and skin fibroblast cells after thermal injury

Biology Open
Jie ZhouXiaoyuan Huang

Abstract

Our previous study has suggested that downregulated microRNA (miR)-29a in denatured dermis might be involved in burn wound healing. However, the exact role of miR-29a in healing of burn injury still remains unclear. Here, we found that expression of miR-29a was notably upregulated in denatured dermis tissues and skin fibroblast cells after thermal injury, and thereafter gradually downregulated compared with control group. By contrast, the expression of collagen, type I, alpha 2 (COL1A2) and vascular endothelial growth factor (VEGF-A) were first reduced and subsequently upregulated in denatured dermis tissues and skin fibroblast cells after thermal injury. We further identified COL1A2 as a novel target of miR-29a, which is involved in type I collagen synthesis, and showed that miR-29a negatively regulated the expression level of COL1A2 in skin fibroblast cells. In addition, VEGF-A, another target gene of miR-29a, was also negatively mediated by miR-29a in skin fibroblast cells. Inhibition of miR-29a expression significantly promoted the proliferation and migration of skin fibroblast cells after thermal injury, and knockdown of COL1A2 and VEGF-A reversed the effects of miR-29a on the proliferation and migration of skin fibroblast...Continue Reading

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Citations

Jul 15, 2017·Clinical Science·Steven HorsburghSteven O'Reilly
Sep 2, 2020·Bioscience, Biotechnology, and Biochemistry·Jingdong GuoXiongxiang Zhu
Jan 16, 2021·Tissue Engineering. Part B, Reviews·Ana M Gracioso MartinsDonald O Freytes

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Methods Mentioned

BETA
transfection
PCR
Protein Assay
Assay

Software Mentioned

GraphPad Prism
GraphPad
SPSS

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