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Published on: July 21, 2018
The PI3K/AKT signaling networks in cancer glucose metabolism: mechanisms and therapeutic implications
Sufen Cheng1, Qi Jiang2, Hua Huang1
1Department of Hematology, The First Affiliated Hospital, Zhejiang University School of Medicine, Qingchun Road 79#, Hangzhou, Zhejiang Province 310003, China.
Abstract:
The PI3K/AKT axis is frequently dysregulated and serves as a central regulator in cancer glucose metabolism. This review outlines the composition and activation mechanisms of the PI3K/AKT pathway, its interactions with core metabolic enzymes (hexokinase, pyruvate kinase, phosphofructokinase, aldolase, lactate dehydrogenase) and their non-canonical roles in cancer metabolism. We also dissect crosstalk between PI3K/AKT, the AMPK energy sensor, and major metabolic pathways (pentose phosphate pathway, oxidative phosphorylation, de novo lipogenesis). Further, we summarize latest advances in targeting metabolic enzymes and combined therapies, discuss challenges in targeting PI3K/AKT-mediated metabolic reprogramming, and propose future directions. Collectively, this review provides a theoretical framework for cancer metabolism mechanisms and identifies novel targets for cancer therapies.
Insights
The PI3K/AKT pathway regulates cancer glucose metabolism. This review details its mechanisms, interactions with metabolic enzymes, and therapeutic targets for novel cancer treatments.
Area of Science:
- Oncology
- Molecular Biology
- Metabolic Research
Background:
- The Phosphatidylinositol 3-kinase/Protein Kinase B (PI3K/AKT) signaling pathway is a key regulator of cellular metabolism.
- Dysregulation of the PI3K/AKT axis is a common event in cancer, significantly impacting glucose metabolism.
- Understanding these metabolic alterations is crucial for developing effective cancer therapies.
Purpose of the Study:
- To review the composition and activation mechanisms of the PI3K/AKT pathway.
- To explore the interactions between PI3K/AKT, core metabolic enzymes, and their non-canonical roles in cancer.
- To dissect the crosstalk between PI3K/AKT, AMP-activated protein kinase (AMPK), and major metabolic pathways.
Main Methods:
- Literature review of the PI3K/AKT pathway in cancer metabolism.
- Analysis of interactions between signaling pathways and metabolic enzymes.
- Summary of current therapeutic strategies and challenges.
Main Results:
- The PI3K/AKT pathway extensively influences core metabolic enzymes like hexokinase and lactate dehydrogenase.
- Significant crosstalk exists between PI3K/AKT, AMPK, and pathways such as the pentose phosphate pathway and oxidative phosphorylation.
- Non-canonical roles of metabolic enzymes are implicated in cancer progression.
Conclusions:
- The PI3K/AKT pathway is central to cancer metabolic reprogramming.
- Targeting metabolic enzymes and combined therapies show promise for cancer treatment.
- Further research into PI3K/AKT-mediated metabolic reprogramming is needed to identify novel therapeutic targets.
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