Linked Life Data

18565507

Source:http://linkedlifedata.com/resource/pubmed/id/18565507

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pubmed-article:18565507pubmed:abstractTextThe angiotensin AT(1) receptor is a key regulator of blood pressure and body fluid homeostasis, and it plays a key role in the pathophysiology of several cardiovascular diseases such as hypertension, cardiac hypertrophy, congestive heart failure, and arrhythmia. The importance of human angiotensin AT(1) receptor signalling is illustrated by the common use of angiotensin AT(1) receptor-inverse agonists in clinical practice. It is well established that rodent orthologues of the angiotensin AT(1) receptor can selectively signal through G protein-dependent and -independent mechanisms in recombinant expression systems, primary cells and in vivo. The in vivo work clearly demonstrates profoundly different cellular consequences of angiotensin AT(1) receptor signalling in the cardiovascular system, suggesting pharmacological potential for drugs which specifically affect a subset of angiotensin AT(1) receptor actions. However, it is currently unknown whether the human angiotensin AT(1) receptor can signal through G protein-independent mechanisms - and if so, what the physiological impact of such signalling is. We have performed a detailed pharmacological analysis of the human angiotensin AT(1) receptor using a battery of angiotensin analogues and registered drugs targeting this receptor. We show that the human angiotensin AT(1) receptor signals directly through G protein-independent pathways and supports NIH3T3 cellular proliferation. The realization of G protein-independent signalling by the human angiotensin AT(1) receptor has clear pharmacological implications for development of drugs with pathway-specific actions and defined biological outcomes.lld:pubmed
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pubmed-article:18565507pubmed:articleTitleThe human angiotensin AT(1) receptor supports G protein-independent extracellular signal-regulated kinase 1/2 activation and cellular proliferation.lld:pubmed
pubmed-article:18565507pubmed:affiliationLaboratory for Molecular Cardiology, The Danish National Research Foundation Centre for Cardiac Arrhythmia, The Heart Centre, Copenhagen University Hospital Rigshospitalet, Copenhagen, Denmark. jlhansen@sund.ku.dklld:pubmed
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