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ACE2/Ang-(1-7)/Mas1 axis and the vascular system: vasoprotection to COVID-19-associated vascular disease.
Kuriakose, Jithin; Montezano, Augusto C; Touyz, Rhian M.
  • Kuriakose J; Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, Scotland, United Kingdom.
  • Montezano AC; Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, Scotland, United Kingdom.
  • Touyz RM; Institute of Cardiovascular and Medical Sciences, University of Glasgow, Glasgow, Scotland, United Kingdom.
Clin Sci (Lond) ; 135(2): 387-407, 2021 01 29.
Article in English | MEDLINE | ID: covidwho-1054073
ABSTRACT
The two axes of the renin-angiotensin system include the classical ACE/Ang II/AT1 axis and the counter-regulatory ACE2/Ang-(1-7)/Mas1 axis. ACE2 is a multifunctional monocarboxypeptidase responsible for generating Ang-(1-7) from Ang II. ACE2 is important in the vascular system where it is found in arterial and venous endothelial cells and arterial smooth muscle cells in many vascular beds. Among the best characterized functions of ACE2 is its role in regulating vascular tone. ACE2 through its effector peptide Ang-(1-7) and receptor Mas1 induces vasodilation and attenuates Ang II-induced vasoconstriction. In endothelial cells activation of the ACE2/Ang-(1-7)/Mas1 axis increases production of the vasodilator's nitric oxide and prostacyclin's and in vascular smooth muscle cells it inhibits pro-contractile and pro-inflammatory signaling. Endothelial ACE2 is cleaved by proteases, shed into the circulation and measured as soluble ACE2. Plasma ACE2 activity is increased in cardiovascular disease and may have prognostic significance in disease severity. In addition to its enzymatic function, ACE2 is the receptor for severe acute respiratory syndrome (SARS)-coronavirus (CoV) and SARS-Cov-2, which cause SARS and coronavirus disease-19 (COVID-19) respectively. ACE-2 is thus a double-edged sword it promotes cardiovascular health while also facilitating the devastations caused by coronaviruses. COVID-19 is associated with cardiovascular disease as a risk factor and as a complication. Mechanisms linking COVID-19 and cardiovascular disease are unclear, but vascular ACE2 may be important. This review focuses on the vascular biology and (patho)physiology of ACE2 in cardiovascular health and disease and briefly discusses the role of vascular ACE2 as a potential mediator of vascular injury in COVID-19.
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Full text: Available Collection: International databases Database: MEDLINE Main subject: Peptide Fragments / Vascular Diseases / Angiotensin I / Proto-Oncogene Proteins / Receptors, G-Protein-Coupled / Angiotensin-Converting Enzyme 2 / COVID-19 Type of study: Prognostic study Limits: Animals / Humans Language: English Journal: Clin Sci (Lond) Year: 2021 Document Type: Article Affiliation country: CS20200480

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Full text: Available Collection: International databases Database: MEDLINE Main subject: Peptide Fragments / Vascular Diseases / Angiotensin I / Proto-Oncogene Proteins / Receptors, G-Protein-Coupled / Angiotensin-Converting Enzyme 2 / COVID-19 Type of study: Prognostic study Limits: Animals / Humans Language: English Journal: Clin Sci (Lond) Year: 2021 Document Type: Article Affiliation country: CS20200480