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致病性SIV感染与 rhesus的表观遗传年龄加速有关
Anna J Jasinska1,2, Ranjit Sivanandham1,2, Sindhuja Sivanandham1,2
1Division of Infectious Diseases, Department of Medicine and.
The Journal of clinical investigation
|July 15, 2025
概括
类似免疫缺陷病毒 (SIV) 感染加快了年轻的衰老,特别是在特定的组织中. 宿主年龄会影响组织如何应对SIV驱动的衰老加速和相关的并发症.
科学领域:
- 免疫学 免疫学 免疫学
- 衰老研究研究 衰老研究
- 病毒学 病毒学
背景情况:
- 人类免疫缺陷病毒 (HIV) 加快生物衰老.
- 宿主年龄对与艾滋病毒相关的衰老的影响尚不清楚.
- 中的类似免疫缺陷病毒 (SIV) 作为艾滋病毒感染的模型.
研究的目的:
- 研究SIV感染如何影响年轻和老 rhesus macaques (RMs) 的并发症和衰老.
- 评估宿主年龄在SIV诱导的表观遗传衰老加速 (EAA) 中的作用.
主要方法:
- 在SIV感染后的年轻和老年RMs的血液和组织中评估了致病性标志物,基于DNA甲基化的表观遗传年龄 (EA) 和EAA.
- 感染期间年龄组之间的免疫反应,凝血,炎症和EA/EAA的比较.
主要成果:
- 年轻的RM最初表现出对SIV的弹性,但在后期阶段失去了它,在PBMC中EA增加,小脑和心脏中EAA增加.
- 年龄较大的RM在SIV早期阶段经历了更快的疾病进展.
- 晚期的SIV感染导致了年轻RM的病原体标志物与老年RM的病原体标志物趋同.
结论:
- 由SIV感染驱动的衰老加速是组织特异性的.
- 宿主年龄显著影响组织对SIV诱导的衰老和病变的敏感性.
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