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The tumor suppressive role of KEAP1: Underlying mechanisms and therapeutic implications
Ziyu Zhang1, Xiangting Jin2, Junhong Chen1
1Department of Hepatobiliary and Pancreatic Surgery, General Surgery Center, First Hospital of Jilin University, Changchun, Jilin Province, China.
Abstract:
Kelch-like ECH-associated protein 1 (KEAP1) serves as an adaptor protein for the Cullin3-RING E3 ubiquitin ligase complex, orchestrating the ubiquitination and subsequent degradation of its substrates including the transcription factor NF-E2-related factor 2 (NRF2) to regulate cell functions. Emerging evidence demonstrates that genetic alterations (mutations or functional inactivation) of KEAP1 occur frequently across multiple cancer types. KEAP1 aberrations lead to constitutive activation of its substrates, which in turn promotes tumorigenesis, confers therapeutic resistance, and facilitates immune evasion. In this review, we systematically summarize and discuss the molecular mechanisms underlying the tumor-suppressive function of KEAP1, the spectrum and functional consequences of cancer-associated KEAP1 mutations, the clinical implications of KEAP1 alterations as prognostic biomarkers, and potential therapeutic strategies targeting the KEAP1-NRF2 axis. Our work provides comprehensive insights into the multifaceted roles of KEAP1 in cancer biology and its therapeutic implications.
Insights
Kelch-like ECH-associated protein 1 (KEAP1) mutations promote cancer by activating NRF2. Understanding KEAP1
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Kelch-like ECH-associated protein 1 (KEAP1) is an adaptor protein regulating the degradation of transcription factor NF-E2-related factor 2 (NRF2).
- Genetic alterations in KEAP1 are common in various cancers, leading to NRF2 pathway activation.
- This activation promotes tumor development, therapeutic resistance, and immune evasion.
Purpose of the Study:
- To review the molecular mechanisms of KEAP1's tumor-suppressive function.
- To detail the consequences of cancer-associated KEAP1 mutations.
- To explore KEAP1 as a prognostic biomarker and therapeutic target.
Main Methods:
- Systematic review of scientific literature.
- Analysis of molecular mechanisms.
- Evaluation of clinical implications and therapeutic strategies.
Main Results:
- KEAP1 aberrations lead to constitutive NRF2 activation, driving tumorigenesis.
- KEAP1 mutations are linked to therapeutic resistance and immune evasion.
- KEAP1 alterations have prognostic significance in cancer patients.
Conclusions:
- KEAP1 plays a critical role in cancer suppression through NRF2 regulation.
- Targeting the KEAP1-NRF2 axis offers potential therapeutic avenues.
- KEAP1 alterations are important biomarkers for cancer prognosis and treatment.
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