在正常和糖尿病模型中,D-Tryptophan通过细胞外矩阵重塑促进皮肤伤口愈合
Dawit Adisu Tadese1,2,3, James Mwangi1,2,3, Brenda B Michira1,2,3
1Key Laboratory of Genetic Evolution & Animal Models, Engineering Laboratory of Peptides of Chinese Academy of Sciences, Key Laboratory of Bioactive Peptides of Yunnan Province, KIZ-CUHK Joint Laboratory of Bioresources and Molecular Research in Common Diseases, National Resource Center for Non-Human Primates, and Sino-African Joint Research Center, New Cornerstone Science Laboratory, Kunming Institute of Zoology, The Chinese Academy of Sciences, Kunming 650201, China.
International journal of molecular sciences
|August 14, 2025
概括
D-托 (D-Trp) 通过增强细胞外基质重塑和减少炎症,显著加速糖尿病伤口愈合. 这项研究强调了D-Trp作为糖尿病伤口并发症的有前途的治疗剂.
科学领域:
- 生物化学 生物化学
- 分子生物学分子生物学
- 伤口治愈研究研究 伤口治愈研究
背景情况:
- 糖尿病伤口由于愈合受损,导致慢性疼痛,感染和截肢,因此具有重大临床挑战.
- 目前的疗法往往无法解决糖尿病伤口愈合不良背后的复杂分子机制.
- D-氨基酸,特别是D-基 (D-Trp),显示出作为细胞过程的调节者的潜力,但它们在糖尿病伤口修复中的作用尚未得到充分研究.
研究的目的:
- 调查D-三 (D-Trp) 在促进糖尿病伤口愈合方面的治疗效果.
- 在糖尿病小鼠模型中阐明D-Trp影响伤口修复,炎症和血管生成的分子机制.
- 为了比较D-Trp与酸盐缓冲盐水 (PBS) 和血管内皮生长因子 (VEGF) 控制的作用.
主要方法:
- 用毒素 (STZ) 诱导的糖尿病小鼠来建模糖尿病伤口.
- 评估了伤口愈合的进展,炎症和组织病理变化.
- 分析了关键信号分子和细胞因子的蛋白质表达 (西部斑) 和基因表达 (RT-qPCR).
- 生物层干涉测量 (BLI) 用于确定D-Trp和缺氧诱导因子-1α (HIF-1α) 之间的结合相互作用.
主要成果:
- 与对照组相比,D-托 (D-Trp) 显著加速了伤口的关闭.
- 通过对矩阵金属蛋白酶 (MMP1,MMP3,MMP-9) 的上调进行D-Trp调节的细胞外矩阵 (ECM) 重塑.
- 它增强了促愈的信号通路,包括Janus激酶2 (JAK2) 和基激活蛋白激酶 (MAPK),同时减少了促炎性细胞因子 (TNF-α,IL-1β,IL-6).
- D-Trp抑制了亡 (caspase-3) 并通过HIF-1α激活促进了血管生成.
结论:
- D-托 (D-Trp) 在加速糖尿病伤口愈合方面显示出显著的治疗潜力.
- 该机制涉及加强ECM周转,减少炎症和MAPK/JAK信号通路的激活.
- D-Trp通过HIF-1α激活促进血管生成的能力进一步支持其作为糖尿病伤口有前途治疗的作用.
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