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About:
ACE2 Expression is elevated in Airway Epithelial Cells from aged and male donors but reduced in asthma
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covidontheweb.inria.fr
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Academic Article
research paper
schema:ScholarlyArticle
isDefinedBy
Covid-on-the-Web dataset
title
ACE2 Expression is elevated in Airway Epithelial Cells from aged and male donors but reduced in asthma
Creator
Chen, Ling
Wark, Peter
Kicic, Anthony
Stick, Stephen
Reid, Andrew
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source
MedRxiv
abstract
Rationale: COVID-19 is complicated by acute lung injury, and death in some individuals. It is caused by SARS-CoV-2 that requires the ACE2 receptor and serine proteases to enter airway epithelial cells (AECs). Objective: To determine what factors are associated with ACE2 expression particularly in patients with asthma and chronic obstructive pulmonary disease (COPD). Methods: We obtained upper and lower AECs from 145 people from two independent cohorts, aged 2-89, Newcastle (n=115), and from Perth (n= 30) Australia. The Newcastle cohort was enriched with people with asthma (n=37) and COPD (n=38). Gene expression for ACE2 and other genes potentially associated with SARS-CoV-2 cell entry were assessed by quantitative PCR, protein expression was confirmed with immunohistochemistry on endobronchial biopsies and cultured AECs. Results: Increased gene expression of ACE2 was associated with older age (p=0.02) and male sex (p=0.03), but not pack-years smoked. When we compared gene expression between adults with asthma, COPD and healthy controls, mean ACE2 expression was lower in asthma (p=0.01). Gene expression of furin, a protease that facilitates viral endocytosis, was also lower in asthma (p=0.02), while ADAM-17, a disintegrin that cleaves ACE2 from the surface was increased (p=0.02). ACE2 protein levels were lower in endobronchial biopsies from asthma patients. Conclusions: Increased ACE2 expression occurs in older people and males. Asthma patients have reduced expression. Altered ACE2 expression in the lower airway may be an important factor in virus tropism and may in part explain susceptibility factors and why asthma patients are not over-represented in those with COVID-19 complications.
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2020-07-29
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bibo:doi
10.1101/2020.07.26.20162248
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medrxiv
sha1sum (hex)
e1370b9a76f057315177c0bf8820fc950b1fc794
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https://doi.org/10.1101/2020.07.26.20162248
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ACE2 Expression is elevated in Airway Epithelial Cells from aged and male donors but reduced in asthma
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covid:e1370b9a76f057315177c0bf8820fc950b1fc794#body_text
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schema:about
of
named entity 'DISEASE'
named entity 'Furin'
named entity 'disease'
named entity 'ADAM'
named entity 'Epithelial'
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