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Am J Physiol Heart Circ Physiol. 2019 May 1;316(5):H958-H970. doi: 10.1152/ajpheart.00723.2018. Epub 2019 Feb 1.

The renin-angiotensin system: going beyond the classical paradigms.

Author information

1
National Institute of Science and Technology in Nanobiopharmaceutics, Department of Physiology and Biophysics, Federal University of Minas Gerais , Belo Horizonte, Minas Gerais , Brazil.
2
Division of Cardiology, Department of Medicine, Mazankowski Alberta Heart Institute, University of Alberta , Edmonton , Canada.
3
Department of Molecular Medicine, Cardiovascular & Renal Research, University of Southern Denmark, Odense, Denmark.
4
Max Delbrück Center for Molecular Medicine , Berlin , Germany.
5
Deutsches Zentrum für Herz-Kreislaufforschung, Partner Site Berlin, Berlin , Germany.
6
Berlin Institute of Health , Berlin , Germany.
7
Charité-University Medicine, Berlin , Germany.
8
Institute for Biology, University of Lübeck , Lübeck , Germany.

Abstract

Thirty years ago, a novel axis of the renin-angiotensin system (RAS) was unveiled by the discovery of angiotensin-(1-7) [ANG-(1-7)] generation in vivo. Later, angiotensin-converting enzyme 2 (ACE2) was shown to be the main mediator of this reaction, and Mas was found to be the receptor for the heptapeptide. The functional analysis of this novel axis of the RAS that followed its discovery revealed numerous protective actions in particular for cardiovascular diseases. In parallel, similar protective actions were also described for one of the two receptors of ANG II, the ANG II type 2 receptor (AT2R), in contrast to the other, the ANG II type 1 receptor (AT1R), which mediates deleterious actions of this peptide, e.g., in the setting of cardiovascular disease. Very recently, another branch of the RAS was discovered, based on angiotensin peptides in which the amino-terminal aspartate was replaced by alanine, the alatensins. Ala-ANG-(1-7) or alamandine was shown to interact with Mas-related G protein-coupled receptor D, and the first functional data indicated that this peptide also exerts protective effects in the cardiovascular system. This review summarizes the presentations given at the International Union of Physiological Sciences Congress in Rio de Janeiro, Brazil, in 2017, during the symposium entitled "The Renin-Angiotensin System: Going Beyond the Classical Paradigms," in which the signaling and physiological actions of ANG-(1-7), ACE2, AT2R, and alatensins were reported (with a focus on noncentral nervous system-related tissues) and the therapeutic opportunities based on these findings were discussed.

KEYWORDS:

alamandine; angiotensin-(1−7); angiotensin-(1−9); angiotensin-converting enzyme 2; heart failure

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