Oct 15, 2020Paper

Angiotensin-converting enzyme 2 (ACE2) is upregulated in Alzheimer's disease brain

BioRxiv : the Preprint Server for Biology
Qiyue DingYuichiro J Suzuki


Alzheimer's disease is a chronic neurodegenerative disorder and represents the main cause of dementia. Currently, the world is suffering from the pandemic of coronavirus disease 2019 (COVID-19) caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) that uses angiotensin-converting enzyme 2 (ACE2) as a receptor to enter the host cells. In COVID-19, neurological manifestations have been reported to occur. The present study demonstrates that the protein expression level of ACE2 is upregulated in the brain of Alzheimer's disease patients. The increased ACE2 expression is not age-dependent, suggesting the direct relationship between Alzheimer's disease and the ACE2 expression. Oxidative stress has been implicated in the pathogenesis of Alzheimer's disease, and Alzheimer's disease brains examined in this study also exhibited higher carbonylated proteins as well as increased thiol oxidation state of peroxiredoxin 6 (Prx6). The positive correlation was found between the increased ACE2 protein expression and oxidative stress in Alzheimer's disease brain. Thus, the present study reveals the relationships between Alzheimer's disease and ACE2, the receptor for SARS-CoV-2. These results warrant monitoring Alzheimer's disease...Continue Reading


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