The treatment of acute wound are complicated regulation process which refers to many systemic and local factors and is in lack of effective clinical therapies. Moreover, extracellular matrix components play a very important role in wound healing. Collagen triple helix repeat containing 1 (CTHRC1) protein is a kind of exocrine protein which can promote cell migration, and inhibits collagen deposition and TGF - beta signaling pathway. Futhermore, epithelial cell migration and TGF - beta signaling pathway play an important role in wound healing process. We have found that CTHRC1 recombinant protein can promote wound healing in mice and enhance the migration ability of immortalized keratinocyte (HaCaT cells).To understand the molecular mechanism of recombinant protein CTHRC1 promoting wound healing, we plan to adopt the interaction system of HaCaT cells and CTHRC1, use a in vivo animal model of acute wound and use the methods of overexpression and knock down, microarray gene expression assay, cell immunofluorescence, ELISA, Real time PCR、Western blot etc. An effective durg target may be established based on our study.
急性创面的治疗一直缺乏临床有效治疗方法。创面愈合过程受到复杂的全身及局部因素调控,而细胞外基质成分在调控创面愈合过程中发挥非常重要的作用。CTHRC1蛋白是一种外分泌蛋白,可以促进多种细胞迁移,并且可以抑制胶原沉积和TGF-β信号通路,而上皮细胞迁移和TGF-β信号在创面愈合过程中有重要作用。预实验发现CTHRC1重组蛋白可以促进小鼠创面愈合,并且CTHRC1重组蛋白处理和过表达CTHRC1的永生化角质形成细胞(HaCaT细胞)迁移能力增强。为了解重组CTHRC1蛋白促进创面愈合的分子机制,我们拟通过CTHRC1重组蛋白和HaCaT细胞相互作用体系,用CTHRC1基因过表达及siRNA干扰,表达谱芯片分析、免疫荧光染色、ELISA、Real time PCR、Western blot等方法研究,从而加深对CTHRC1细胞外分泌蛋白作用分子机制的了解,为寻找促进创面愈合的新药物靶点奠定基础。
急性伤口的愈合对人类至关重要,是一个精心安排的过程,涉及到系统和局部因素。然而,缺乏有效和安全的临床治疗方法。含有1(CTHRC1)蛋白的胶原三螺旋重复序列是一种外分泌蛋白,最近被报道有助于组织修复。我们的目的是验证CTHRC1对急性创伤愈合的促进作用,并阐明其分子机制。因此,我们首先建立了急性伤口愈合小鼠模型,并证实CTHRC1加速了急性伤口的愈合过程。然后,我们用聚乙烯醇(PVA)海绵模型对创伤巨噬细胞进行了表征,并用Western blotting研究了其分子机制。我们发现CTHRC1通过激活TGF-β和Notch通路,增加了M2巨噬细胞的数量和TGF-β的表达水平,最终促进了创面愈合。Notch通路的抑制作用减弱了M2巨噬细胞的募集,降低了TGF-β的表达水平。这些结果证实了我们的假设,即CTHRC1通过招募M2巨噬细胞和调节TGF-β和Notch途径促进伤口愈合。
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数据更新时间:2023-05-31
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