Cited by 40Protein Kinase Regulation and GTPase SignalingReceptor Mechanisms and SignalingConnective Tissue Growth Factor Research

G Protein-Coupled Receptors Go Extracellular: RhoA Integrates the Integrins

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Walsh, C. T., Stupack, D., Brown, J. H.·2008·Molecular Interventions

Abstract

The identification of downstream effectors of G protein-coupled receptors (GPCRs) is critical for understanding the interactions between signaling cascades and for developing new pharmacological approaches for controlling GPCR-mediated responses. RhoA is a small G protein that serves as a proximal downstream effector of numerous GPCRs and regulates a variety of basic cell functions, including migration, survival, and proliferation. Intriguingly, GPCR ligands such as thrombin, sphingosine-1-phosphate, and lysophosphatidic acid, which signal through G(12/13) and activate RhoA, have recently been shown to induce the expression of the extracellular matrix protein Cyr61 (i.e., CCN1). Cyr61 is secreted and interacts with cell surface integrins to activate kinase and transcriptional cascades that are also known to contribute to cell migration, survival, and proliferation. The GPCR/RhoA/Cyr61/integrin pathway defines a novel convergence mechanism for integrating GPCR-and integrin-dependent signaling cascades that may contribute to sustained and pathophysiological responses to GPCR activation.

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  • Thrombin acts through GPCR and RhoA signaling to induce CCN1, which then interacts with integrins to promote cell proliferation, connecting GPCR and integrin signaling to enhance thrombin-induced cell proliferation.

    “Thrombin acts through the GPCR and RhoA signaling pathways to induce CCN1, which in turn interacts with integrins to promote cell proliferation [35]. Thus, CCN1 serves to connect the GPCR and integrin signaling pathways to enhance thrombin-induced cell proliferation [38].”

    From CCN1/CYR61: the very model of a modern matricellular protein (2011) · cites this paper as [38]

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  1. [27]Lau LF Lam SCT Perbal B Takigawa M Integrated-mediated CCN functions CCN Proteins: A New Family of Cell Growth and Differentiation Regulators 2005 61 79 Imperial College Press London

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Authors
Walsh, C. T., Stupack, D., & Brown, J. H.
Affiliations
University of California San Diego (US)
Venue
Molecular Interventions
Published
2008-08-01
Volume
8
Issue
4
Pages
165-173
ISSN
1534-0384 (ISSN-L)
OpenAlex
W2077835424
Cited by
40
References
70
Citations by year
2026: 1 · 2025: 1 · 2024: 4 · 2023: 1 · 2021: 1 · 2020: 1 · 2019: 2 · 2018: 1 · 2017: 1 · 2016: 3 · 2015: 4 · 2014: 3 · 2013: 3 · 2012: 4
FWCI
1.37
Type
journal article
Language
en
Open access
Licence
cc-by-nc-nd
Locations
  • Molecular Interventions (publishedVersion, cc-by-nc-nd)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Cancer Institute (R01CA218859)
  • National Institute of General Medical Sciences (R56GM036927, R01GM036927)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Receptor Mechanisms and Signaling
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Connective Tissue Growth Factor Research
Keywords
G protein-coupled receptors, RhoA, CYR61, integrins, thrombin, sphingosine-1-phosphate, lysophosphatidic acid, extracellular matrix, cell migration, cell survival, cell proliferation
MeSH terms
Animals, Extracellular Space, Humans, Signal Transduction, Integrins, rhoA GTP-Binding Protein, Intercellular Signaling Peptides and Proteins, Receptors, G-Protein-Coupled

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