Linking Autophagy and the Dysregulated NFκB/ SNAIL/YY1/RKIP/PTEN Loop in Cancer: Therapeutic Implications
1Department of Microbiology, Immunology, & Molecular Genetics, David Geffen School of Medicine, Johnson Comprehensive Cancer Center, University of California at Los Angeles, Los Angeles, CA 90025-1747.
Abstract:
The role of autophagy in the pathogenesis of various cancers has been well documented in many reports. Autophagy in cancer cells regulates cell proliferation, viability, invasion, epithelial-to-mesenchymal transition (EMT), metastasis, and responses to chemotherapeutic and immunotherapeutic treatment strategies. These manifestations are the result of various regulatory gene products that govern autophagic, biochemical, and molecular mechanisms. In several human cancer cell models, the presence of a dysregulated circuit-namely, NFκB/SNAIL/YY1/RKIP/PTEN-that plays a major role in the regulation of tumor cell unique characteristics just listed for autophagy-regulated activities. Accordingly, the autophagic mechanism and the dysregulated circuit in cancer cells share many of the same properties and activities. Thus, it has been hypothesized that there must exist a biochemical/molecular link between the two. The present review describes the link and the association of each gene product of the dysregulated circuit with the autophagic mechanism and delineates the presence of crosstalk. Crosstalk between autophagy and the dysregulated circuit is significant and has important implications in the development of targeted therapies aimed at either autophagy or the dysregulated gene products in cancer cells.
Insights
Autophagy regulates cancer cell behaviors and treatment responses. This review details the link between autophagy and a key cancer-associated gene circuit, revealing crosstalk with therapeutic implications.
Area of Science:
- Oncology
- Molecular Biology
- Cell Biology
Background:
- Autophagy is crucial in cancer pathogenesis, influencing proliferation, metastasis, and treatment response.
- A specific dysregulated gene circuit (NFκB/SNAIL/YY1/RKIP/PTEN) is implicated in regulating cancer cell characteristics.
- Similarities in function suggest a molecular link between autophagy and this gene circuit.
Purpose of the Study:
- To elucidate the biochemical/molecular link between autophagy and the dysregulated NFκB/SNAIL/YY1/RKIP/PTEN circuit in cancer.
- To describe the association of each gene product within the circuit to autophagic mechanisms.
- To highlight the crosstalk between autophagy and the circuit and its therapeutic relevance.
Main Methods:
- Review of existing literature on autophagy in cancer.
- Analysis of gene products within the NFκB/SNAIL/YY1/RKIP/PTEN circuit.
- Examination of molecular and biochemical mechanisms governing autophagy and the circuit.
Main Results:
- Detailed description of the link between autophagy and the dysregulated gene circuit.
- Identification of crosstalk between autophagic mechanisms and the circuit's gene products.
- Demonstration that both autophagy and the circuit influence cancer cell proliferation, viability, invasion, EMT, metastasis, and treatment responses.
Conclusions:
- Significant crosstalk exists between autophagy and the NFκB/SNAIL/YY1/RKIP/PTEN circuit in cancer cells.
- This crosstalk has critical implications for developing targeted cancer therapies.
- Targeting either autophagy or specific gene products in the circuit offers potential therapeutic strategies.
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