Cited by 184Retinoids in leukemia and cellular processesProtein Kinase Regulation and GTPase SignalingPI3K/AKT/mTOR signaling in cancer

Rapid, Nongenomic Actions of Retinoic Acid on Phosphatidylinositol-3-Kinase Signaling Pathway Mediated by the Retinoic Acid Receptor

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Masiá, Susana, Alvarez, Susana, de Lera, Angel R., Barettino, Domingo·2007·Molecular Endocrinology

Abstract

Retinoic acid (RA) treatment of SH-SY5Y neuroblastoma cells results in activation of phosphatidylinositol-3-kinase (PI3K) signaling pathway, and this activation is required for RA-induced differentiation. Here we show that RA activates PI3K and ERK1/2 MAPK signaling pathways through a rapid, nongenomic mechanism that does not require new gene transcription or newly synthesized proteins. Activation of PI3K by RA appears to involve the classical nuclear receptor, retinoic acid receptor (RAR), on the basis of the pharmacological profile of the activation, loss, and gain of function experiments with mouse embryo fibroblast-RAR(alpha beta gamma)(L-/L-) null cells, and the physical association between liganded RAR and PI3K activity. The association of RAR with the two subunits of PI3K was differentially regulated by the ligand. Immunoprecipitation experiments performed in SH-SY5Y cells showed stable association between RARalpha and p85, the regulatory subunit of PI3K, independently of the presence of RA. In contrast, ligand administration increased the association of p110, the catalytic subunit of PI3K, to this complex. The intracellular localization of RAR proved to be relevant for PI3K activation. A chimerical RAR fusing c-Src myristylation domain to the N terminus of RARalpha (Myr-RARalpha) was targeted to plasma membrane. Transfection of Myr-RARalpha to mouse embryo fibroblast-RAR(alpha beta gamma)(L-/L-) null cells and COS-7 cells results in strong activation of the PI3K signaling pathway, although both in the absence as well in the presence of RA. Our results support a mechanism in which ligand binding to RAR would play a major role in the assembly and intracellular location of a signaling complex involving RAR and the subunits of PI3K.

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Crossref · 10.1210/me.2007-0062

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  • 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 ).”
  • 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 ).”
  • 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 ).”

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Authors
Masiá, S., Alvarez, S., de Lera, A. R., & Barettino, D.
Affiliations
  • Biology of Hormone Action Unit (S.M., D.B.). Department of Molecular and Cellular Pathology and Therapy, Instituto de Biomedicina de Valencia [Consejo Superior de Investigaciones Cientificas (CSIC)], E-46010 Valencia, Spain;
  • Universidade de Vigo (S.A., A.R.d.L.), Departamento de Química Orgánica, Facultad de Ciencias, E-36200 Vigo, Spain
  • Consejo Superior de Investigaciones Científicas (ES)
Corresponding author
Barettino, Domingo
Venue
Molecular Endocrinology
Published
2007-10-01
Volume
21
Issue
10
Pages
2391-2402
ISSN
  • 0888-8809 (ISSN-L)
  • 1944-9917
OpenAlex
W2015219861
Cited by
184
References
67
Citations by year
2026: 3 · 2025: 6 · 2024: 8 · 2023: 2 · 2022: 4 · 2021: 4 · 2020: 9 · 2019: 16 · 2018: 12 · 2017: 5 · 2016: 13 · 2015: 11 · 2014: 16 · 2013: 15 · 2012: 11
FWCI
5.01
Type
journal article
Language
en
Open access
Locations
  • Molecular Endocrinology (publishedVersion)
  • PubMed (publishedVersion)
  • DIGITAL.CSIC (Spanish National Research Council (CSIC)) (submittedVersion, other-oa)
Funders
  • European Commission
  • Generalitat Valenciana
  • European Regional Development Fund
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 › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
Keywords
retinoic acid, non-genomic signaling, retinoic acid receptor, phosphatidylinositol 3-kinase, PI3K signaling, ERK signaling, neuronal differentiation, SH-SY5Y cells, p85 regulatory subunit, p110 catalytic subunit, RARα, subcellular localization
MeSH terms
Retinoic Acid Receptor alpha, Humans, Tretinoin, Signal Transduction, Receptors, Retinoic Acid, Phosphatidylinositol 3-Kinases, Mitogen-Activated Protein Kinase 1, Cell Line, Tumor, Mitogen-Activated Protein Kinase 3

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