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合成肽SVVYGLR的皮肤伤口愈合活性评估。

Evaluation of dermal wound healing activity of synthetic peptide SVVYGLR.

作者信息

Uchinaka Ayako, Kawaguchi Naomasa, Ban Tsuyoshi, Hamada Yoshinosuke, Mori Seiji, Maeno Yoshitaka, Sawa Yoshiki, Nagata Kohzo, Yamamoto Hirofumi

机构信息

Department of Pathophysiological Laboratory Sciences, Nagoya University Graduate School of Medicine, Aichi, Japan.

Departments of Cardiovascular Pathology, Osaka University Graduate School of Medicine, Division of Health Sciences, Osaka, Japan; Department of Drug Discovery Cardiovascular Regeneration, Osaka University Graduate School of Medicine, Division of Health Sciences, Osaka, Japan.

出版信息

Biochem Biophys Res Commun. 2017 Sep 23;491(3):714-720. doi: 10.1016/j.bbrc.2017.07.124. Epub 2017 Jul 25.

Abstract

SVVYGLR peptide (SV peptide) is a 7-amino-acid sequence with angiogenic properties that is derived from osteopontin in the extracellular matrix and promotes differentiation of fibroblasts to myofibroblast-like cells and the production of collagen type Ⅲ by cardiac fibroblasts. However, the effects of SV peptide on dermal cells and tissue are unknown. In this study, we evaluated the effects of this peptide in a rat model of dermal wound healing. The synthetic SV peptide was added to dermal fibroblasts or keratinocytes, and their cellular motility was evaluated. In an in vivo wound healing exeriment, male rats aged 8 weeks were randomly assigned to the SV peptide treatment, non-treated control, or phosphate-buffered saline (PBS) groups. Wound healing was assessed by its repair rate and histological features. Scratch assay and cell migration assays using the Chemotaxicell method showed that SV peptide significantly promoted the cell migration in both fibroblasts and keratinocytes. In contrast the proliferation potency of these cells was not affected by SV peptide. In the rat model, wound healing progressed faster in the SV peptide-treated group than in the control and PBS groups. The histopathological analyses showed that the SV peptide treatment stimulated the migration of fibroblasts to the wound area and increased the number of myofibroblasts. Immunohistochemical staining showed a marked increase of von Willebland factor-positive neomicrovessels in the SV peptide-treated group. In conclusion, SV peptide has a beneficial function to promote wound healing by stimulating granulation via stimulating angiogenesis, cell migration, and the myofibroblastic differentiation of fibroblasts.

摘要

SVVYGLR肽(SV肽)是一种具有血管生成特性的7个氨基酸序列,它源自细胞外基质中的骨桥蛋白,可促进成纤维细胞向肌成纤维细胞样细胞分化,并促进心脏成纤维细胞产生Ⅲ型胶原蛋白。然而,SV肽对真皮细胞和组织的影响尚不清楚。在本研究中,我们在大鼠皮肤伤口愈合模型中评估了该肽的作用。将合成的SV肽添加到真皮成纤维细胞或角质形成细胞中,并评估它们的细胞运动性。在体内伤口愈合实验中,将8周龄的雄性大鼠随机分为SV肽治疗组、未治疗对照组或磷酸盐缓冲盐水(PBS)组。通过修复率和组织学特征评估伤口愈合情况。划痕试验和使用Chemotaxicell方法的细胞迁移试验表明,SV肽显著促进了成纤维细胞和角质形成细胞的细胞迁移。相比之下,这些细胞的增殖能力不受SV肽的影响。在大鼠模型中,SV肽治疗组的伤口愈合比对照组和PBS组进展更快。组织病理学分析表明,SV肽治疗刺激了成纤维细胞向伤口区域的迁移,并增加了肌成纤维细胞的数量。免疫组织化学染色显示,SV肽治疗组中血管性血友病因子阳性的新微血管明显增加。总之,SV肽具有有益作用,可通过刺激血管生成、细胞迁移和成纤维细胞的肌成纤维细胞分化来促进肉芽形成,从而促进伤口愈合。

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