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JOURNAL OF MECHANICAL ENGINEERING  > 2020  >  37(3): 460-468, 479.
Zhihong ZHENG, Chaohua ZHANG, Haisheng LIN, Shaokui ZENG, Xiaoming QIN, Wenhong CAO, Haiyuan CHEN. Wound-healing acceleration of mice skin by Sipunculus nudus extract and its mechanism[J]. JOURNAL OF MECHANICAL ENGINEERING, 2020, 37(3): 460-468, 479. doi: 10.7507/1001-5515.201908008
Citation: Zhihong ZHENG, Chaohua ZHANG, Haisheng LIN, Shaokui ZENG, Xiaoming QIN, Wenhong CAO, Haiyuan CHEN. Wound-healing acceleration of mice skin by Sipunculus nudus extract and its mechanism[J]. JOURNAL OF MECHANICAL ENGINEERING, 2020, 37(3): 460-468, 479. doi: 10.7507/1001-5515.201908008
shu

Wound-healing acceleration of mice skin by Sipunculus nudus extract and its mechanism

doi: 10.7507/1001-5515.201908008
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  • Corresponding author: ZHANG Chaohua, Email: zhangch2@139.com; LIN Haisheng, Email: haishenglin@163.com
  • Received Date: 02 Aug 2019
  • Rev Recd Date: 31 Mar 2020
  • Publish Date: 17 Mar 2020
    Abstract
  • In order to explore the effect of Sipunculus nudus extract (SNE) on skin wound healing in mice and its mechanism, hemostasis effect of SNE was measured, the mouse skin wound model was established by full-thickness excision. The morphological changes of the wound were observed after the treatment with SNE and the healing rate was measured. The changes of wound histology were observed by hematoxylin eosin (HE) staining, Masson staining and transmission electron microscope (TEM). The expression of cell factors and related proteins was detected by quantitative real-time polymerase chain reaction (qRT-PCR). Results showed that the SNE possessed hemostatic function. SNE could obviously improve the healing rate of wound in mouse and shorten time of scab removal compared with the none-treatment (NT) group (P < 0.05).The pathological histology analysis results showed complete epidermal regeneration, with remarkable capillary and collagen fiber observed in the SNE group. The expression level of tumor necrosis factor-α (TNF -α), interleukin-1β (IL-1β) and transforming growth factor-β1 (TGF-β1) in SNE group was significantly lower than that of the NT group on 7 d ( P < 0.05). Moreover, compared with the NT group, the gene expressions level of Smad7 was significantly increased and the level of type II TGF-β receptors (TGF-βRII), collagen I (COL1A1) and α-smooth muscle actin (α-SMA) were significantly reduced in the SNE group on 28 d ( P < 0.05), but the difference was not statistically significant compared to Yunnanbaiyao group (PC group) ( P > 0.05). These results indicated that SNE possessed obvious activity of accelerating wound healing and inhibiting scar formation, and its mechanism was closely related to hemostatic function, regulation of inflammatory factors, collagen deposition, collagen fiber remodeling and intervening TGF-β/Smads signal pathway. Therefore, SNE may have promising clinical applications in skin wound repair and scar inhibition.

     

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