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November 1, 2005Journal of Clinical InvestigationOpen Access

When 7 transmembrane receptors are not G protein-coupled receptors

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Key result

These commentaries discuss recent findings on G protein-independent signaling by the angiotensin II type 1 receptor in vivo and the variable phenotypic expression of RAG1 mutations.

Population

Mouse heart model

Comparison

Cardiac-specific overexpression of AT1-i2m vs Cardiac-specific overexpression of AT1-WT

Design

Editorial

Authors

KRKeshava RajagopalThomas Jefferson University

Discussion

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Implication

This commentary highlights the first in vivo evidence that 7-transmembrane receptors like AT1R can signal independently of G proteins, presenting novel therapeutic opportunities for biased agonists.

Structured PICO

P
Population
Mouse heart model (transgenic mice with cardiac-specific overexpression of a mutant AT1R incapable of G protein coupling [Tg-i2m] or wild-type receptor [Tg-WT])
I
Intervention
Cardiac-specific overexpression of AT1-i2m (mutant AT1R incapable of G protein coupling)
C
Comparator
Cardiac-specific overexpression of AT1-WT (wild-type AT1R)
O
Outcome
Cardiac phenotype including ventricular dilatation, eccentric hypertrophy, cardiomyocyte apoptosis, and electrophysiologic disturbancessurrogate

This commentary highlights the first in vivo evidence that 7-transmembrane receptors like AT1R can signal independently of G proteins, presenting novel therapeutic opportunities for biased agonists.

Cite This Study

Keshava Rajagopal (2005) reported an editorial. These commentaries discuss recent findings on G protein-independent signaling by the angiotensin II type 1 receptor in vivo and the variable phenotypic expression of RAG1 mutations.

synapsesocial.com/papers/6a8ad7d73c68152a7ce94aefhttps://doi.org/10.1172/jci26950
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Also Consider

Synapse has enriched 4 closely related papers on similar clinical questions. Consider them for comparative context:

  1. 1Cardiac-specific overexpression of AT1 receptor mutant lacking G q/G i coupling causes hypertrophy and bradycardia in transgenic mice2005 · 172 citations
  2. 2AT1 Receptor Mutant Lacking Heterotrimeric G Protein Coupling Activates the Src-Ras-ERK Pathway without Nuclear Translocation of ERKs2002 · 141 citations
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  4. 4β-Arrestin-Dependent Formation of β 2 Adrenergic Receptor-Src Protein Kinase Complexes1999 · 1,500 citations