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灵长类心肺衰老的单细胞转录组图谱。

Single-cell transcriptomic atlas of primate cardiopulmonary aging.

机构信息

State Key Laboratory of Membrane Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China.

State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China.

出版信息

Cell Res. 2021 Apr;31(4):415-432. doi: 10.1038/s41422-020-00412-6. Epub 2020 Sep 10.

Abstract

Aging is a major risk factor for many diseases, especially in highly prevalent cardiopulmonary comorbidities and infectious diseases including Coronavirus Disease 2019 (COVID-19). Resolving cellular and molecular mechanisms associated with aging in higher mammals is therefore urgently needed. Here, we created young and old non-human primate single-nucleus/cell transcriptomic atlases of lung, heart and artery, the top tissues targeted by SARS-CoV-2. Analysis of cell type-specific aging-associated transcriptional changes revealed increased systemic inflammation and compromised virus defense as a hallmark of cardiopulmonary aging. With age, expression of the SARS-CoV-2 receptor angiotensin-converting enzyme 2 (ACE2) was increased in the pulmonary alveolar epithelial barrier, cardiomyocytes, and vascular endothelial cells. We found that interleukin 7 (IL7) accumulated in aged cardiopulmonary tissues and induced ACE2 expression in human vascular endothelial cells in an NF-κB-dependent manner. Furthermore, treatment with vitamin C blocked IL7-induced ACE2 expression. Altogether, our findings depict the first transcriptomic atlas of the aged primate cardiopulmonary system and provide vital insights into age-linked susceptibility to SARS-CoV-2, suggesting that geroprotective strategies may reduce COVID-19 severity in the elderly.

摘要

衰老是许多疾病的一个主要风险因素,尤其是在高发的心肺合并症和传染病中,包括 2019 年冠状病毒病(COVID-19)。因此,迫切需要解决与高等哺乳动物衰老相关的细胞和分子机制。在这里,我们创建了年轻和年老的非人类灵长类动物肺部、心脏和动脉的单细胞/核转录组图谱,这些都是 SARS-CoV-2 靶向的主要组织。对细胞类型特异性衰老相关转录变化的分析表明,全身性炎症增加和病毒防御受损是心肺衰老的标志。随着年龄的增长,SARS-CoV-2 受体血管紧张素转换酶 2(ACE2)在肺肺泡上皮屏障、心肌细胞和血管内皮细胞中的表达增加。我们发现白细胞介素 7(IL7)在衰老的心肺组织中积累,并以 NF-κB 依赖的方式诱导人血管内皮细胞中 ACE2 的表达。此外,维生素 C 的治疗阻断了 IL7 诱导的 ACE2 表达。总之,我们的研究结果描绘了衰老灵长类动物心肺系统的第一张转录组图谱,并为 SARS-CoV-2 相关的年龄易感性提供了重要的见解,表明抗衰老策略可能降低老年人 COVID-19 的严重程度。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0746/7483052/38214fb1b994/41422_2020_412_Fig1_HTML.jpg

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