表皮-免疫-流体相互作用在人类脏移植中急性脏损伤后定义不同的修复和纤维化途径
bioRxiv : the preprint server for biology
|May 14, 2025
概括
移植中的细胞可塑性决定了修复结果. 再生计划促进恢复,而纤维化途径导致慢性损伤,突出表皮细胞-免疫-肌脉交叉作为治疗目标.
科学领域:
- 腎病學和免疫學 腎病學和免疫學
- 翻译研究是翻译研究.
- 单细胞和空间生物学
背景情况:
- 急性损伤 (AKI) 是早期移植功能障碍的重要原因,特别是在高风险的捐赠者中.
- 细胞机制区分AKI解决与移植后纤维化进展的细胞机制尚未完全理解.
- 了解这些机制对于改善长期移植生存和预防慢性全移植损伤至关重要.
研究的目的:
- 阐明移植后不同结果 (恢复与纤维化) 背后的细胞和分子机制.
- 识别不同的细胞程序和细胞-细胞相互作用,这些程序决定了急性损伤后的移植命运.
- 探索潜在的治疗点,以促进脏全移植的恢复和预防慢性损伤.
主要方法:
- 单核RNA测序 (snRNA-seq) 和成像质细胞测量 (IMC) 在人类代移植活检上进行.
- 活检是在移植后8周内采集的,并根据长期功能结果进行分层.
- 计算轨迹分析和功能测试被用来绘制细胞系和相互作用的地图.
主要成果:
- 恢复的移植显示出再生的近接管状细胞 (PTC),表达PROM1,CD24和损伤标志物 (分散的管状细胞,STC).
- 不恢复的移植体具有明显的过渡性PTC亚群 (tPT4) 具有脱差和纤维细胞样特征,并具有益纤维菌性 stromal 血统.
- 观察到不同的免疫特征:修复性MΦ2 /调节性DCs在恢复植入物中与非恢复植入物中的炎症性MΦ1 /亲纤维性DCs相比.
- 空间分析证实了受伤管道,纤维细胞和免疫细胞在纤维化区域的同位化.
- 功能性测试将缺血损伤与单细胞衍生的MΦ激活和纤维细胞基因诱导联系起来,而PAX8敲击损害了PTC增殖并促进了炎症.
结论:
- 表皮细胞可塑性是移植AKI后不同修复结果的关键驱动因素.
- 显著的再生和纤维细胞程序在管状,免疫和层状体内运行.
- 皮质-免疫-流体交叉是促进移植恢复和预防慢性全移植损伤的关键治疗标.
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