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Cited by 159

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Heterotrimeric Gi Proteins Link Hedgehog Signaling to Activation of Rho Small GTPases to Promote Fibroblast Migration

Open access
Polizio, Ariel H., Chinchilla, Pilar, Chen, Xiaole, Kim, Sangbumn, Manning, David R., Riobo, Natalia A.·2011·Journal of Biological Chemistry

Abstract

Evidence supporting the functionality of Smoothened (SMO), an essential transducer in most pathways engaged by Hedgehog (Hh), as a G(i)-coupled receptor contrasts with the lack of an apparently consistent requirement for G(i) in Hh signal transduction. In the present study, we sought to evaluate the role of SMO-G(i) coupling in fibroblast migration induced by Sonic Hedgehog (Shh). Our results demonstrate an absolute requirement for G(i) in Shh-induced fibroblast migration. We found that Shh acutely stimulates the small Rho GTPases Rac1 and RhoA via SMO through a G(i) protein- and PI3K-dependent mechanism, and that these are required for cell migration. These responses were independent of transcription by Gli and of the C-terminal domain of SMO, as we show using a combination of molecular and genetic tools. Our findings provide a mechanistic model for fibroblast migration in response to Shh and underscore the role of SMO-G(i) coupling in non-canonical Hh signaling.

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Metadata

Authors
Polizio, A. H., Chinchilla, P., Chen, X., Kim, S., Manning, D. R., & Riobo, N. A.
Venue
Journal of Biological Chemistry
Publisher
Elsevier BV
Published
2011-06
Volume
286
Issue
22
Pages
19589-19596
ISSN
0021-9258 (ISSN-L)
OpenAlex
W2011815295
Cited by
159
References
2
FWCI
5.53
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: Heterotrimeric Gi Proteins Link Hedgehog Signaling to Activation of Rho Small GTPases to Promote Fibroblast Migration. https://app.cochat.ai/papers/10.1074/jbc.m110.197111
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Polizio, A. H., Chinchilla, P., Chen, X., Kim, S., Manning, D. R., & Riobo, N. A. (2011). Heterotrimeric Gi Proteins Link Hedgehog Signaling to Activation of Rho Small GTPases to Promote Fibroblast Migration. Journal of Biological Chemistry. https://doi.org/10.1074/jbc.m110.197111

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