Human Mesenchymal Stem Cells Improve Angiogenesis and Bone Formation in Severed Finger Rats through SIRT1/Nrf2 Signaling


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Abstract

Background:This study employed a severed finger rat model to analyze the effects of human mesenchymal stem cells (MSCs) on angiogenesis, inflammatory response, apoptosis, and oxidative stress, to evaluate the possible mechanism of the repair effect of MSCs on severed finger (SF) rats.

Methods:Sixty Sprague-Dawley (SD) rats were categorized into five groups (n = 12). The pathological changes of severed finger tissues were investigated by Hematoxylin and eosin (H&E) staining on day 14 after the rats were sacrificed. The levels of inflammatory factors and oxidative stress factors were detected by ELISA. Terminal Deoxynucleotidyl Transferase (TdT) dUTP Nick End Labeling (TUNEL) was employed to assess the apoptosis of chondrocytes in severed finger tissues. The expression of osteocalcin (OCN), osteopontin (OPN), Collagen I (Col-1), and CD31 were detected by immunohistochemistry or immunofluorescence assay, respectively. The expression levels of related proteins were determined by western blot.

Result:Our study presented evidence that MSCs treatment improved pathological changes of skin and bone tissue, diminished the inflammatory response, prevented oxidative stress injury, suppressed chondrocyte apoptosis, and promoted angiogenesis, and bone formation compared to the model group. In addition, EX527 treatment attenuated the effect of MSCs, SRT1720 and ML385 co-treatment also attenuated the effect of MSCs. Importantly, the MSCs treatment increased the expression of Sirtuin 1(SIRT1)/Nuclear factor erythroid2-related factor 2(Nrf2) relate proteins.

Conclusion:Our study indicated that the mechanism of the effect of MSCs on a severed finger was related to the SIRT1/ Nrf2 signaling pathway.

About the authors

Hao Wu

Department of Sports Medicine, Yantaishan Hospital

Email: info@benthamscience.net

Weixue Sun

Department of Arthrology Surgery, Yantai Yuhuangding Hospital

Email: info@benthamscience.net

Gong Cheng

Department of Sports Medicine, Yantaishan Hospital

Email: info@benthamscience.net

Mingdi Zheng

Department of Sports Medicine, Yantaishan Hospital

Email: info@benthamscience.net

Yuchi Zhao

Department of Articulation Surgery, Yantaishan Hospital

Email: info@benthamscience.net

Zhilin Cao

Department of Sports Medicine, Yantaishan Hospital

Author for correspondence.
Email: info@benthamscience.net

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