释放EGCG的纳米纤维支架通过γδ T细胞调节增强了伤口愈合
Tiantian An1, Zhaoyu Xu1, Yang Yang1
1State Key Laboratory of Oral Diseases & National Center for Stomatology & National Clinical Research Center for Oral Diseases, Department of Oral Implantology, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, Sichuan, China; Frontier Innovation Center for Dental Medicine Plus, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041, Sichuan, China.
Biomaterials
|July 19, 2025
概括
这项研究表明,EGCG释放的支架显著增强了γδT细胞,通过AREG-EGFR通路促进细胞迁移和组织修复,增强了伤口愈合. 当 γδ T 细胞或这种途径被阻断时,观察到愈合障碍.
科学领域:
- 生物材料科学 生物材料科学
- 免疫学 免疫学 免疫学
- 再生医学是一种再生医学.
背景情况:
- γδ T 细胞在组织修复和免疫反应中起着至关重要的作用.
- 乙甲基酸盐 (EGCG) 具有有益于伤口愈合的抗炎和抗氧化特性.
- 对齐的纳米纤维支架为控制药物输送和组织工程提供了一个有希望的平台.
研究的目的:
- 通过释放EGCG的纳米纤维支架 (APEMS) 研究γδ T细胞在伤口愈合中的作用.
- 阐明APEMS介导的伤口修复的潜在分子机制,重点关注AREG-EGFR信号通路.
- 评估APEMS在促进高级伤口再生方面的治疗潜力.
主要方法:
- 制造一个EGCG释放对齐的纳米纤维支架 (APEMS),持续释放超过11天.
- 在C57BL/6J小鼠和免疫缺陷的TCRδ-/-小鼠中使用了刺伤口切除模型.
- 进行单细胞RNA测序和CellChat分析以确定关键信号通路和细胞群.
- 研究了使用单克隆抗体和Gefitinib阻断AREG-EGFR通路的影响.
主要成果:
- 与对照支架 (APS) 相比,APEMS显著增强了重新上皮质化和伤口关闭.
- 单细胞RNA测序显示,APEMS组内 γδ T 细胞的数量大幅增加 (66.2%与33.8%相比).
- 由APEMS诱导的γδ T细胞分泌了安菲雷古林 (AREG),激活AREG-EGFR轴以促进角质细胞和纤维细胞功能.
- 在TCRδ-/-小鼠和当AREG/EGFR信号被抑制时,观察到受损的伤口愈合,从而否定了APEMS的益处.
结论:
- EGCG释放对齐的纳米纤维支架 (APEMS) 通过增强 γδ T 细胞活性,有效促进伤口愈合.
- 该AREG-EGFR信号通路对于通过APEMS促进的γδ T细胞介导的伤口修复至关重要.
- 向γδ T细胞和AREG-EGFR通路为先进的伤口管理和组织再生提供了一个有前途的治疗策略.
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