Cited by 62Retinoids in leukemia and cellular processesProtein Kinase Regulation and GTPase SignalingNuclear Receptors and Signaling

CSK Controls Retinoic Acid Receptor (RAR) Signaling: a RAR–c-SRC Signaling Axis Is Required for Neuritogenic Differentiation

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Dey, Nandini, De, Pradip K., Wang, Mu, Zhang, Hongying, Dobrota, Erika A., Robertson, Kent A., Durden, Donald L.·2007·Molecular and Cellular Biology

Abstract

Herein, we report the first evidence that c-SRC is required for retinoic acid (RA) receptor (RAR) signaling, an observation that suggests a new paradigm for this family of nuclear hormone receptors. We observed that CSK negatively regulates RAR functions required for neuritogenic differentiation. CSK overexpression inhibited RA-mediated neurite outgrowth, a result which correlated with the inhibition of the SFK c-SRC. Consistent with an extranuclear effect of CSK on RAR signaling and neurite outgrowth, CSK overexpression blocked the downstream activation of RAC1. The conversion of GDP-RAC1 to GTP-RAC1 parallels the activation of c-SRC as early as 15 min following all-trans-retinoic acid treatment in LA-N-5 cells. The cytoplasmic colocalization of c-SRC and RARgamma was confirmed by immunofluorescence staining and confocal microscopy. A direct and ligand-dependent binding of RAR with SRC was observed by surface plasmon resonance, and coimmunoprecipitation studies confirmed the in vivo binding of RARgamma to c-SRC. Deletion of a proline-rich domain within RARgamma abrogated this interaction in vivo. CSK blocked the RAR-RA-dependent activation of SRC and neurite outgrowth in LA-N-5 cells. The results suggest that transcriptional signaling events mediated by RA-RAR are necessary but not sufficient to mediate complex differentiation in neuronal cells. We have elucidated a nongenomic extranuclear signal mediated by the RAR-SRC interaction that is negatively regulated by CSK and is required for RA-induced neuronal differentiation.

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Crossref · 10.1128/mcb.01352-06

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  • In neuronal cells, Sertoli cells, and embryonic stem cells, RA instead activates p42/p44 Erk or classical MAPKs.

    “However, in neuronal cells, Sertoli cells, and embryonic stem cells, RA instead activates the p42/p44 extracellular signal-regulated kinases (Erk) or classical MAPKs ( 116-122 ).”
  • In neuronal cells, the activation of Erks has been shown to involve either RARα localized in membranes or RARγ in association with the Src kinase.

    “However, in neuronal cells, the activation of Erks has been shown to involve either RAR ␣ localized in membranes ( 121 ) or RAR ␥ in association with the sarcome (Src) kinase ( 117 ).”
  • RA-induced activation of the two MAPK pathways is subsequent to activation of upstream cascades involving Rho-GTPases, PI3K and/or PKB/Akt.

    “Nevertheless, the RA-induced activation of the two MAPK pathways is subsequent to the activation of upstream cascades involving Rho-GTPases ( 114, 115, 117 ), phosphoinositide 3-kinase (PI3K) and/or protein kinase B (PKB)/Akt ( 120, 121, 123 ), suggesting an atypical, nongenomic activation event similar to that described for steroid nuclear receptors ( 124, 125 ).”

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Authors
Dey, N., De, P. K., Wang, M., Zhang, H., Dobrota, E. A., Robertson, K. A., & Durden, D. L.
Affiliations
  • Emory University (US)
  • Indiana University Indianapolis (US)
  • Riley Hospital for Children (US)
Corresponding author
  • Robertson, Kent A.
  • Durden, Donald L.
Venue
Molecular and Cellular Biology
Published
2007-06
Volume
27
Issue
11
Pages
4179-4197
ISSN
  • 0270-7306 (ISSN-L)
  • 1098-5549
OpenAlex
W2136392162
Cited by
62
References
76
Citations by year
2026: 1 · 2025: 1 · 2024: 1 · 2023: 2 · 2022: 1 · 2021: 1 · 2020: 2 · 2019: 3 · 2018: 5 · 2017: 2 · 2016: 4 · 2015: 6 · 2014: 5 · 2013: 11
FWCI
1.72
Type
journal article
Language
en
Open access
Locations
  • Molecular and Cellular Biology (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Aflac
  • Georgia Cancer Coalition
  • Emory University
  • National Institutes of Health (CA94233)
  • Winship Cancer Institute
  • National Cancer Institute (CA 94233, R56CA094233, R01CA094233)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Retinoids in leukemia and cellular processes
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Nuclear Receptors and Signaling
Keywords
Src kinase, Csk, retinoic acid receptor gamma, retinoic acid signaling, neurite outgrowth, neuronal differentiation, Rac1 activation, non-genomic signaling, nuclear receptors, proline-rich region, all-trans retinoic acid
MeSH terms
Retinoic Acid Receptor alpha, Animals, Antineoplastic Agents, Cell Differentiation, Cell Line, Enzyme Inhibitors, Humans, Protein-Tyrosine Kinases, Pyrazoles, Pyrimidines, Recombinant Fusion Proteins, Tretinoin, Signal Transduction, Genes, src, Proto-Oncogene Proteins pp60(c-src), Neurites, Receptors, Retinoic Acid, rac1 GTP-Binding Protein

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