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RAAS,ACE2 and COVID-19; a mechanistic review
Authors:Ahmed Elshafei  Emad Gamil Khidr  Ahmed A El-Husseiny  Maher H Gomaa
Institution:Biochemistry and Molecular Biology Department, Faculty of Pharmacy, Al-Azhar University, Nasr City 11231, Cairo, Egypt
Abstract:The use of angiotensin-converting enzyme inhibitors (ACEIs) and angiotensin receptor blockers (ARBs) in coronavirus disease 2019 (COVID-19) patients has been claimed as associated with the risk of COVID-19 infection and its subsequent morbidities and mortalities. These claims were resulting from the possibility of upregulating the expression of angiotensin-converting enzyme 2 (ACE2), facilitation of SARS-CoV-2 entry, and increasing the susceptibility of infection in such treated cardiovascular patients. ACE2 and renin-angiotensin-aldosterone system (RAAS) products have a critical function in controlling the severity of lung injury, fibrosis, and failure following the initiation of the disease. This review is to clarify the mechanisms beyond the possible deleterious effects of angiotensin II (Ang II), and the potential protective role of angiotensin 1–7 (Ang 1–7) against pulmonary fibrosis, with a subsequent discussion of the latest updates on ACEIs/ARBs use and COVID-19 susceptibility in the light of these mechanisms and biochemical explanation.
Keywords:COVID-19  ACE2  Angiotensin II  Angiotensin 1–7  ACEIs  ARBs  ACE1"}  {"#name":"keyword"  "$":{"id":"k0040"}  "$$":[{"#name":"text"  "_":"angiotensin-converting enzyme 1  ACE2"}  {"#name":"keyword"  "$":{"id":"k0050"}  "$$":[{"#name":"text"  "_":"angiotensin-converting enzyme 2  ACEIs"}  {"#name":"keyword"  "$":{"id":"k0060"}  "$$":[{"#name":"text"  "_":"angiotensin-converting enzyme inhibitors  AEC-II"}  {"#name":"keyword"  "$":{"id":"k0070"}  "$$":[{"#name":"text"  "_":"alveolar epithelial type II cells  Ang 1-7"}  {"#name":"keyword"  "$":{"id":"k0080"}  "$$":[{"#name":"text"  "_":"angiotensin 1-7  Ang 1-9"}  {"#name":"keyword"  "$":{"id":"k0090"}  "$$":[{"#name":"text"  "_":"angiotensin 1-9  AngI"}  {"#name":"keyword"  "$":{"id":"k0100"}  "$$":[{"#name":"text"  "_":"angiotensin I  AngII"}  {"#name":"keyword"  "$":{"id":"k0110"}  "$$":[{"#name":"text"  "_":"angiotensin II  ARBs"}  {"#name":"keyword"  "$":{"id":"k0120"}  "$$":[{"#name":"text"  "_":"angiotensin receptor blockers  AT1R"}  {"#name":"keyword"  "$":{"id":"k0130"}  "$$":[{"#name":"text"  "_":"angiotensin type 1 receptor  AT2R"}  {"#name":"keyword"  "$":{"id":"k0140"}  "$$":[{"#name":"text"  "_":"angiotensin type 2 receptor  COVID-19"}  {"#name":"keyword"  "$":{"id":"k0150"}  "$$":[{"#name":"text"  "_":"coronavirus disease 2019  CVD"}  {"#name":"keyword"  "$":{"id":"k0160"}  "$$":[{"#name":"text"  "_":"cardiovascular disease  ERK"}  {"#name":"keyword"  "$":{"id":"k0170"}  "$$":[{"#name":"text"  "_":"extracellular signal-regulated kinase  ICU"}  {"#name":"keyword"  "$":{"id":"k0180"}  "$$":[{"#name":"text"  "_":"intensive care unit  MAPK"}  {"#name":"keyword"  "$":{"id":"k0190"}  "$$":[{"#name":"text"  "_":"mitogen-activated protein kinase  miR-21"}  {"#name":"keyword"  "$":{"id":"k0200"}  "$$":[{"#name":"text"  "_":"microRNA-21  NLRP3"}  {"#name":"keyword"  "$":{"id":"k0210"}  "$$":[{"#name":"text"  "_":"(NOD  LRR  and pyrin domain-containing protein 3)  RAAS"}  {"#name":"keyword"  "$":{"id":"k0220"}  "$$":[{"#name":"text"  "_":"renin-angiotensin-aldosterone system  TGF-β"}  {"#name":"keyword"  "$":{"id":"k0230"}  "$$":[{"#name":"text"  "_":"transforming growth factor-beta
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