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Studying Wnt Signaling During Patterning of Conducting Airways
Published on: October 16, 2016
Expression profile and clinical significance of Wnt signaling in human gliomas
Hao Zhang1, Yanhua Qi1, Decheng Geng1
1The Graduate School, Xuzhou Medical University, Xuzhou, Jiangsu 221002, P.R. China.
Abstract:
Wnt signaling has been identified as a critical regulator of human tumor development in vitro. However, there remains a lack of studies systematically examining the expression pattern and clinical relevance of the core molecules of Wnt signaling in glioma tissues. In the present study, it was identified that the mRNA expression levels of Wnt3a and 5a, and their receptors frizzled 2, 6 and 7 increased, whereas Wnt7b was markedly decreased in glioma relative to non-tumor tissue. The mRNA levels of β-catenin, adenomatous polyposis coli gene product, glycogen synthase kinase 3β (GSK3β) and AXIN1 and its target genes cyclin D1 and AXIN2 did not differ. Similarly, the protein levels of Wnt2b, 3a and 5a were increased in gliomas, while β-catenin, GSK3β and cyclin D1 were not. Furthermore, based on data from the R2: Genomics Analysis and Visualization Platform, the expression of Wnt2b and 5a, and frizzled 2, 6 and 7 were highly associated with the prognosis of patients with glioma. Taken together, the results of the present study demonstrate that β-catenin is not upregulated in gliomas and that the Wnt signaling pathway may promote glioma development via noncanonical or alternative pathways.
Insights
Wnt signaling molecules Wnt3a, Wnt5a, and their receptors are elevated in glioma, impacting patient prognosis. However, beta-catenin is not upregulated, suggesting alternative Wnt pathways drive glioma development.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Wnt signaling is crucial for tumor development.
- Limited research exists on Wnt pathway components in glioma tissues.
- Understanding Wnt signaling in glioma is vital for targeted therapies.
Purpose of the Study:
- To investigate the expression patterns of core Wnt signaling molecules in glioma.
- To determine the clinical relevance and prognostic impact of Wnt pathway components in glioma patients.
- To elucidate the role of Wnt signaling in glioma development.
Main Methods:
- Analysis of mRNA and protein expression levels of Wnt signaling components in glioma and non-tumor tissues.
- Utilized the R2: Genomics Analysis and Visualization Platform for prognostic correlation.
- Compared expression levels between tumor and normal tissues.
Main Results:
- Elevated mRNA levels of Wnt3a, Wnt5a, frizzled 2, 6, and 7; decreased Wnt7b in glioma.
- No significant difference in mRNA levels of beta-catenin, GSK3β, AXIN1, cyclin D1, and AXIN2.
- Increased protein levels of Wnt2b, Wnt3a, and Wnt5a; unchanged beta-catenin, GSK3β, and cyclin D1 in gliomas.
- Wnt2b, Wnt5a, frizzled 2, 6, and 7 expression correlated with glioma patient prognosis.
Conclusions:
- Beta-catenin is not upregulated in gliomas.
- Wnt signaling may promote glioma development through noncanonical or alternative pathways.
- Specific Wnt pathway components have prognostic significance in glioma.
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