AJAP1 is dysregulated at an early stage of gliomagenesis and suppresses invasion through cytoskeleton reorganization.

Journal Article (Journal Article)

AIMS: Down-regulation of AJAP1 in glioblastoma multiforme (GBM) has been reported. However, the expression profiles of AJAP1 in gliomas and the underlying mechanisms of AJAP1 function on invasion are still poorly understood. METHODS: The gene profiles of AJAP1 in glioma patients were studied among four independent cohorts. Confocal imaging was used to analyze the AJAP1 localization. After AJAP1 overexpression in GBM cell lines, cellular polarity, cytoskeleton distribution, and antitumor effect were investigated in vitro and in vivo. RESULTS: AJAP1 expression was significantly decreased in gliomas compared with normal brain in REMBRANDT and CGCA cohorts. Additionally, low AJAP1 expression was associated with worse survival in GBMs in REMBRANDT and TCGA U133A cohorts and was significantly associated with classical and mesenchymal subtypes of GBMs among four cohorts. Confocal imaging indicated AJAP1 localized in cell membranes in low-grade gliomas and AJAP1-overexpressing GBM cells, but difficult to assess in high-grade gliomas due to its absence. AJAP1 overexpression altered the cytoskeleton and cellular polarity in vitro and inhibited the tumor growth in vivo. CONCLUSIONS: AJAP1 is dysregulated at an early stage of gliomagenesis and may suppress glioma cell invasion and proliferation, which suggests that AJAP1 may be a potential diagnostic and prognostic marker for gliomas.

Full Text

Duke Authors

Cited Authors

  • Han, L; Zhang, K-L; Zhang, J-X; Zeng, L; Di, C-H; Fee, BE; Rivas, M; Bao, Z-S; Jiang, T; Bigner, D; Kang, C-S; Adamson, DC

Published Date

  • May 2014

Published In

Volume / Issue

  • 20 / 5

Start / End Page

  • 429 - 437

PubMed ID

  • 24483339

Pubmed Central ID

  • PMC4511491

Electronic International Standard Serial Number (EISSN)

  • 1755-5949

Digital Object Identifier (DOI)

  • 10.1111/cns.12232


  • eng

Conference Location

  • England