与年龄相关的冠状腺缩与冠状腺中内皮原生细胞的衰老有关
Ali Riza Nazari1, Loraine Gresseau1, Tiffany Habelrih2
1Department of Ophthalmology, Maisonneuve-Rosemont Hospital Research Center, University of Montréal, Montréal, QC H1T 2M4, Canada.
Biomedicines
|January 8, 2025
概括
衰老会减少胆管中的内皮原生细胞 (EPC),导致衰老和血管功能受损. 准这些衰老的EPC可以保持胆道完整性,并预防与年龄相关的黄斑变性.
科学领域:
- 眼科医生 眼科 眼科
- 老年学是指老年学的学科.
- 血管生物学 血管生物学
背景情况:
- 胸腔内卷是与年龄相关的缺血性视网膜病变 (如AMD) 的标志.
- 内皮原生细胞 (EPC) 对于血管的修复和完整性至关重要.
- 对于EPC衰老在与年龄相关的胆道血管退化中的作用尚未完全理解.
研究的目的:
- 在老老鼠中研究胆道EPCs的衰老表型.
- 为了比较来自年轻老鼠和老老鼠的EPCs的全基因组表达特征.
主要方法:
- 在年轻和老老大鼠中比较状和外核层厚度.
- CD34+ EPC 的量化和 EPC 标记物的表达.
- 对衰老标记物的分析 (β-gal,P53,Lamin-B1).
- 外体血管网络形成试验.
- 使用下一代测序 (NGS) 进行EPC的全基因组分析 (mRNA和miRNA).
主要成果:
- 较老的老鼠表现出较小的胸膜厚度和较少的EPCs,标记物表达较低.
- 来自老老老鼠的冠状体EPCs表现出增加的衰老标志物和受损的血管网络形成.
- NGS揭示了与炎症有关的基因的显著调节,GPCR信号传递,以及老EPCs中的造血系.
- 与免疫反应,细胞周期和衰老相关的13个miRNA在老年EPC中被调节.
结论:
- 与年龄相关的胆道内变与表现衰老的功能性EPCs减少有关.
- 修改衰老的EPC,可能与老化剂一起,可能是治疗策略.
- 这种方法可能有助于保持老化状血管的完整性,并预防黄斑病变.
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