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Towards Targeting PI3K-Dependent Regulation of Gene Expression in Brain Cancer
1Department of Pathology, School of Biomedical Sciences, University of Melbourne, Parkville 3010, VIC, Australia. theom@unimelb.edu.au.
Abstract:
The PI3K pathway is one of the most highly perturbed cell signaling pathways in human cancer, including the most common malignant brain tumors, gliomas, where either activating mutations of positive pathway effectors or loss/inactivation of pathway inhibitors occurs. Knowledge of the precise transcription factors modulated by PI3K in tumor cells remains elusive but there are numerous PI3K-responsive signaling factors, including kinases, which can activate many transcription factors. In the context of cancer, these transcription factors participate in the regulation of target genes expression networks to support cancer cell characteristics such as survival, proliferation, migration and differentiation. This review focuses on the role of PI3K signaling-regulated transcription in brain cancer cells from a series of recent investigations. A deeper understanding of this regulation is beginning to provide the hope of developing more sophisticated anti-cancer targeting approaches, where both upstream and downstream components of the PI3K pathway may be targeted by existing and novel drugs.
Insights
The PI3K pathway is crucial in brain cancers like gliomas. Understanding PI3K
Area of Science:
- Oncology
- Molecular Biology
- Cancer Signaling
Background:
- The phosphoinositide 3-kinase (PI3K) pathway is frequently dysregulated in human cancers, particularly gliomas.
- Aberrant PI3K signaling, driven by mutations or altered inhibitors, promotes cancer cell survival, proliferation, migration, and differentiation.
- The specific transcription factors regulated by PI3K in tumor cells are not fully understood.
Purpose of the Study:
- To review the role of PI3K signaling-regulated transcription in brain cancer cells.
- To highlight recent investigations into PI3K-mediated transcriptional regulation in gliomas.
- To explore the therapeutic potential of targeting PI3K pathway components in brain tumors.
Main Methods:
- Literature review of recent investigations.
- Analysis of PI3K-responsive signaling factors and their downstream transcription factors.
- Focus on gene expression networks regulated by PI3K in brain cancer.
Main Results:
- PI3K signaling influences numerous transcription factors via intermediate kinases.
- These transcription factors control gene expression networks essential for cancer cell phenotypes.
- Recent studies provide insights into PI3K-regulated transcription in gliomas.
Conclusions:
- Targeting PI3K signaling-regulated transcription offers a promising avenue for brain cancer therapy.
- Developing sophisticated anti-cancer strategies may involve targeting both upstream and downstream PI3K pathway components.
- Further understanding of PI3K-mediated transcriptional control can lead to novel therapeutic approaches.
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