Cited by 57Wnt/β-catenin signaling in development and cancerPI3K/AKT/mTOR signaling in cancerGlioma Diagnosis and Treatment

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Inactivation of PI3K/AKT signaling inhibits glioma cell growth through modulation of β-catenin-mediated transcription

Abstract

Aberrant Wnt/β-catenin signaling contributes to the development of many cancers, including glial tumorigenesis. While cross talk between the Wnt/β-catenin and PI3K/AKT signaling pathways has been proposed, the impact of PI3K/AKT inhibition on β-catenin signaling in glioma remains unknown. In the present study, we report decreased cell proliferation and invasive ability upon the LY294002-induced inhibition of PI3K in both U251 and LN229 human glioblastoma cells in vitro. Pharmacologic inhibition of PI3K resulted in the downregulation of several members of the β-catenin pathway, including Fra-1, c-Myc, and cyclin D1. Downregulation impacted β-catenin-mediated transcription, as LY294002 decreased β-catenin/TCF transcriptional activity, determined by the reporter assay. Similar results were observed in vivo, as intratumoral injection of LY294002 downregulated the expression of the components of the β-catenin pathway and delayed tumor growth in nude mice harboring subcutaneous LN229 xenografts. These results suggest that the PI3K/AKT signaling pathway regulates glioma cell proliferation, in part via repression of the Wnt/β-catenin pathway.

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Crossref · 10.1016/j.brainres.2010.09.097

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Metadata

Authors
Han, L., Yang, Y., Yue, X., Huang, K., Liu, X., Pu, P., Jiang, H., Yan, W., Jiang, T., & Kang, C.
Affiliations
  • Tianjin Medical University General Hospital (CN)
  • Second Hospital of Tianjin Medical University (CN)
  • Henry Ford Hospital (US)
  • Capital Medical University (CN)
Corresponding author
  • Jiang, Tao
  • Kang, Chunsheng
Venue
Brain Research
Publisher
Elsevier BV
Published
2010-12
Volume
1366
Pages
9-17
ISSN
0006-8993 (ISSN-L)
OpenAlex
W2032563823
Cited by
57
References
1
Citations by year
2026: 3 · 2025: 3 · 2024: 1 · 2023: 1 · 2022: 3 · 2021: 2 · 2020: 4 · 2018: 4 · 2017: 9 · 2016: 2 · 2015: 4 · 2014: 4 · 2013: 6 · 2012: 5
FWCI
2.21
Type
journal article
Language
en
Open access
closed
Locations
  • Brain Research (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Key Project of Science and Technology Supporting Programs of China (No. 2007BAI05B08)
  • China National Natural Scientific Fund (30772238, 30772231, 30971136)
  • Program for New Century Excellent Talents in University (NCET-07-0615)
  • Tianjin Science and Technology Committee (09JCZDJC17600)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Wnt/β-catenin signaling in development and cancer
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › PI3K/AKT/mTOR signaling in cancer
  • Health Sciences › Medicine › Oncology › Glioma Diagnosis and Treatment
Keywords
PI3K/Akt signaling, Wnt/β-catenin signaling, glioblastoma, LY294002, Fra-1, c-Myc, cyclin D1, tumor cell proliferation, tumor invasion, signaling crosstalk, xenograft tumor growth
MeSH terms
Animals, Cell Cycle, Chromones, Disease Models, Animal, Enzyme Inhibitors, Female, Gene Expression Regulation, Glioma, Humans, Mice, Inbred BALB C, Mice, Nude, Morpholines, Serine, Time Factors, Transfection, Signal Transduction, Phosphatidylinositol 3-Kinases, Cell Line, Tumor, Cell Proliferation, Oncogene Protein v-akt, beta Catenin, Mice

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