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Current Molecular Pharmacology

Author(s): Jianguo Feng*, Menghong Long, Xin Zhao, Pijun Yan, Yunxiao Lin, Maohua Wang* and Wenhua Huang*

DOI: 10.2174/0118761429260980231005105929

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RBM3 Accelerates Wound Healing of Skin in Diabetes through ERK1/2 Signaling

Article ID: e18761429260980 Pages: 11

  • * (Excluding Mailing and Handling)

Abstract

Background: With the increasing risk of infections and other serious complications, the underlying molecular mechanism of wound healing impairment in diabetes deserves attention. Cold shock proteins (CSPs), including CIRP and RBM3 are highly expressed in the skin; however, it is unknown whether CSPs are involved in the wound-healing impairment of diabetic skin.

Objectives: The objective of this study is to investigate the effects of RBM3 on skin wound healing in diabetes.

Methods: In vitro experiments, western blot assay was used to test the levels of proteins in HaCaT cells treated with different concentrations of glucose. RBM3 was over-expressed in HaCaT cells using lentivirus particles. Cell viability was analyzed by Cell-Counting Kit-8 assay and colony formation assay. The migration of HaCaT cells at different concentrations of glucose was evaluated by wound healing assay. In vivo experiments, the mouse model of diabetes was established by intraperitoneal injection of streptozotocin. Four weeks later, the mice were anesthetized by intraperitoneal injection of pentobarbital sodium for skin tissue collection or wound healing experiments. RBM3 knockout mice were established by removing exons 2–6 using the clustered regularly interspaced short palindromic repeats (CRISPR)-Cas9 technique and then used in skin wound healing experiments with or without diabetic stress.

Results: In this study, the expression of RBM3, rather than CIRP, was altered in the skin of diabetic specimens, and the RBM3’s overexpression accelerated the cell viability and proliferation of HaCaT cells under high glucose conditions. RBM3 deficiency caused delayed wound healing in RBM3 knockout in diabetic conditions. Moreover. RBM3 enhanced the ERK1/2 signaling pathway, and its inhibitor FR180204 blocked the beneficial effect of RBM3 overexpression on skin wound healing in diabetes.

Conclusion: RBM3 activated the ERK1/2 signal to facilitate skin wound healing in diabetes, offering a novel therapeutic target for its treatment.

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