Cited by 40Melanoma and MAPK PathwaysPI3K/AKT/mTOR signaling in cancerProtein Kinase Regulation and GTPase Signaling

The T-box transcription factor, TBX3, is a key substrate of AKT3 in melanomagenesis

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Peres, Jade, Mowla, Shaheen, Prince, Sharon·2015·Oncotarget

Abstract

// Jade Peres 1 , Shaheen Mowla 1 , Sharon Prince 1 1 Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Observatory, 7925, Cape Town, South Africa Correspondence to: Sharon Prince, e-mail: sharon.prince@uct.ac.za Keywords: TBX3, AKT3, melanoma, E-cadherin, T-box factors Received: September 12, 2014 Accepted: November 19, 2014 Published: December 16, 2014 ABSTRACT The AKT3 signalling pathway plays a critical role in melanoma formation and invasion and components of this signalling cascade are therefore attractive targets for the treatment of malignant melanoma. Recent evidence show that the embryonically important TBX3 transcription factor is upregulated in a subset of melanomas and plays a key role in promoting melanoma formation and invasion, in part by repressing the cell adhesion molecule E-cadherin. We have identified TBX3 as a key substrate of AKT3 in melanomagenesis. Briefly, using site-directed mutagenesis and in vitro kinase assays, we have identified the AKT3 target site at serine residue 720 in the TBX3 protein and show that this site is phosphorylated in vivo . Importantly, we show by western blotting, immunofluorescence, reporter, migration and invasion assays that the phosphorylation at S720 promotes TBX3 protein stability, nuclear localization, transcriptional repression of E-cadherin, and its role in cell migration and invasion. Our results identify a novel signalling and transcriptional network linking AKT3, TBX3 and E-cadherin during melanoma migration and invasion and reveals TBX3 as a potential target for anti-metastatic therapeutics.

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  • TBX3 has previously been shown to directly interact with these signaling cascades in other cell types to regulate cell survival and proliferation.

    “TBX3 has previously been shown to directly interact with these signaling cascades in other cell types to regulate cell survival and proliferation [54–57]”

    From The oncoprotein TBX3 is controlling severity in experimental arthritis (2019) · cites this paper as [56]

    The Discussion (page unavailable) reports TBX3 interactions with PI3K/AKT signaling in mouse embryonic stem cells and with p38 MAPK in COS cells, supporting the reference to other cell types. It also describes PI3K/AKT as promoting survival and proliferation in melanoma, but does not establish that TBX3’s interactions with those cascades regulate both outcomes in other cell types. (LLM, conf=0.82)

    Experimental — accuracy not yet measured
  • A few kinases participate in phosphorylation of TBX3, such as AKT3 at S720, cyclin A-CDK2 at either S190 or S354, p38 MAP kinase at S692, and AKT1 is also involved.

    “Moreover, a few kinases participate in phosphorylation of TBX3, such as AKT3 at S720, cyclin A-CDK2 at either S190 or S354, p38 MAP kinase at S692, and AKT1 is also involved54,59–61.”

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Research works printed but not linked: 2

  1. [3]Coit DG Andtbacka R Anker CJ Bichakjian CK Carson WE 3rd Daud A Dilawari RA Dimaio D Guild V Halpern AC Hodi FS Jr Kelley MC Melanoma J Natl Compr Canc Network 2012 3 10 366 400 22393197
  2. [4]Miller A Mihm M Melanoma The New England J of Medicine 2006 355 51 65 16822996

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Authors
Peres, J., Mowla, S., & Prince, S.
Affiliations
University of Cape Town (ZA)
Corresponding author
Prince, Sharon
Venue
Oncotarget
Published
2014-12-16
Volume
6
Issue
3
Pages
1821-1833
ISSN
1949-2553 (ISSN-L)
OpenAlex
W2169096028
Cited by
40
References
51
Citations by year
2026: 2 · 2025: 3 · 2024: 6 · 2023: 3 · 2022: 3 · 2021: 1 · 2020: 3 · 2019: 5 · 2018: 3 · 2017: 4 · 2016: 6 · 2015: 1
FWCI
1.50
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Oncotarget (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Funders
  • National Research Foundation
  • Cancer Association of South Africa
  • University of Cape Town
  • Medical Research Council
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Melanoma and MAPK Pathways
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Protein Kinase Regulation and GTPase Signaling
Keywords
TBX3, AKT3, melanoma, melanomagenesis, E-cadherin, protein phosphorylation, protein stability, nuclear localization, transcriptional repression, cell migration, tumor invasion, Akt signaling, anti-metastatic therapy
MeSH terms
Humans, Melanoma, Phosphorylation, Transfection, Cadherins, Up-Regulation, Mutagenesis, Site-Directed, T-Box Domain Proteins, Proto-Oncogene Proteins c-akt

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