Journal ArticleDOI
Cloning and expression of a complementary DNA encoding a bovine adrenal angiotensin II type-1 receptor
Kazuyuki Sasaki,Yamano Y,S. Bardhan,Naoharu Iwai,Murray Jj,M. Hasegawa,Y. Matsuda,Tadashi Inagami +7 more
TLDR
The expression cloning of a complementary DNA encoding a bovine angiotensin II receptor is reported to overcome the difficulties faced in purifying the receptor owing to its instability and low concentration.Abstract:
Angiotensin II elicits different responses which affect cardiovascular, neuronal and electrolyte transport regulation. To understand the mechanisms responsible for its various actions, the receptor for angiotensin II has long been sought, but numerous attempts to purify the receptor have been unsuccessful owing to its instability and low concentration. We report here the expression cloning of a complementary DNA encoding a bovine angiotensin II receptor to overcome these difficulties. The receptor cDNA encodes a protein of 359 amino-acid residues with a transmembrane topology similar to that of other G protein-coupled receptors. COS-7 cells transfected with the cDNA expressed specific and high-affinity binding sites for angiotensin II, angiotensin II antagonist and a non-peptide specific antagonist for type-1 receptor. Dithiothreitol inhibited ligand binding. The concentration of intracellular Ca2+ and of inositol-1,4,5-trisphosphate increased in the transfected COS-7 cells in response to angiotensin II or angiotensin III, indicating that this receptor is the type-1 receptor for angiotensin II. Northern blot analysis revealed that the messenger RNA for this receptor is expressed in bovine adrenal medulla, cortex and kidney.read more
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Journal Article
International Union of Pharmacology. XXIII. The Angiotensin II Receptors
TL;DR: Although AT(1) receptors mediate most of the known actions of Ang II, the AT(2) receptor contributes to the regulation of blood pressure and renal function and the development of specific nonpeptide receptor antagonists has led to major advances in the physiology, pharmacology, and therapy of the renin-angiotensin system.
Journal ArticleDOI
Molecular characterization of angiotensin II--induced hypertrophy of cardiac myocytes and hyperplasia of cardiac fibroblasts. Critical role of the AT1 receptor subtype.
Junichi Sadoshima,Seigo Izumo +1 more
TL;DR: The phenotypic changes of cardiac cells in response to Ang II in vitro closely mimic those of growth factor response in vitro and of load-induced hypertrophy in vivo, and all biological effects of Ang II examined here are mediated primarily by the AT1 receptors.
Journal Article
Molecular and Cellular Mechanisms of Angiotensin II-Mediated Cardiovascular and Renal Diseases
Shokei Kim,Hiroshi Iwao +1 more
TL;DR: In vivo recent evidence suggest that the activation of mitogen-activated protein kinases and activator protein-1 by Ang II may play the key role in cardiovascular and renal diseases, however, there are still unresolved questions and controversies on the mechanism of Ang II-mediated cardiovascular and kidneys diseases.
Journal Article
Signal Transduction Mechanisms Mediating the Physiological and Pathophysiological Actions of Angiotensin II in Vascular Smooth Muscle Cells
TL;DR: Alterations of these highly regulated signaling pathways in vascular smooth cells may be pivotal in structural and functional abnormalities that underlie vascular pathological processes in cardiovascular diseases such as hypertension, atherosclerosis, and post-interventional restenosis.
Journal ArticleDOI
Sequence alignment of the G-protein coupled receptor superfamily.
TL;DR: This work has compiled and aligned the 74 unique amino acid sequences published to date and review the present understanding of the structural motifs contributing to ligand binding and G-protein coupling.
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