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Deciphering the dual role and prognostic potential of PINK1 across cancer types
Katherine Dai1, Daniel P Radin2, Donna Leonardi3
1Department of Molecular, Cellular, and Developmental Biology, Yale University, New Haven, CT, USA.
Abstract:
Metabolic rewiring and deregulation of the cell cycle are hallmarks shared by many cancers. Concerted mutations in key tumor suppressor genes, such as PTEN, and oncogenes predispose cancer cells for marked utilization of resources to fuel accelerated cell proliferation and chemotherapeutic resistance. Mounting research has demonstrated that PTEN-induced putative kinase 1 (PINK1) acts as a pivotal regulator of mitochondrial homeostasis in several cancer types, a function that also extends to the regulation of tumor cell proliferative capacity. In addition, involvement of PINK1 in modulating inflammatory responses has been highlighted by recent studies, further expounding PINK1's multifunctional nature. This review discusses the oncogenic roles of PINK1 in multiple tumor cell types, with an emphasis on maintenance of mitochondrial homeostasis, while also evaluating literature suggesting a dual oncolytic mechanism based on PINK1's modulation of the Warburg effect. From a clinical standpoint, its expression may also dictate the response to genotoxic stressors commonly used to treat multiple malignancies. By detailing the evidence suggesting that PINK1 possesses distinct prognostic value in the clinical setting and reviewing the duality of PINK1 function in a context-dependent manner, we present avenues for future studies of this dynamic protein.
Insights
PTEN-induced putative kinase 1 (PINK1) regulates mitochondrial homeostasis and cell proliferation in cancer. Its dual role in cancer progression and potential as a prognostic marker warrant further investigation.
Area of Science:
- Oncology
- Molecular Biology
- Cell Biology
Background:
- Cancer cells exhibit metabolic rewiring and cell cycle dysregulation, often driven by mutations in tumor suppressors like PTEN and oncogenes.
- PTEN-induced putative kinase 1 (PINK1) is increasingly recognized for its role in maintaining mitochondrial homeostasis and regulating tumor cell proliferation.
- Emerging evidence suggests PINK1 also influences inflammatory responses, highlighting its multifaceted functions in cancer.
Purpose of the Study:
- To review the oncogenic roles of PINK1 across various cancer types, focusing on its impact on mitochondrial homeostasis.
- To evaluate the proposed dual oncolytic mechanism of PINK1, particularly its modulation of the Warburg effect.
- To explore the clinical significance of PINK1 expression as a prognostic indicator and its influence on treatment response.
Main Methods:
- Literature review of studies investigating PTEN-induced putative kinase 1 (PINK1) in cancer.
- Analysis of research on PINK1's role in mitochondrial function and cellular metabolism (Warburg effect).
- Examination of clinical data correlating PINK1 expression with cancer prognosis and treatment outcomes.
Main Results:
- PINK1 plays a crucial role in maintaining mitochondrial homeostasis, which supports cancer cell proliferation and survival.
- PINK1's modulation of the Warburg effect suggests a complex, potentially dual role in cancer, acting both in oncogenesis and potentially in oncolysis.
- PINK1 expression levels show potential as a prognostic biomarker, influencing patient response to genotoxic therapies.
Conclusions:
- PINK1 is a significant regulator of mitochondrial homeostasis and cellular metabolism in cancer, with context-dependent functions.
- The dual role of PINK1 in cancer warrants further research to elucidate its precise mechanisms and therapeutic potential.
- PINK1 expression may serve as a valuable prognostic marker for various malignancies, guiding clinical treatment strategies.
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