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Clinical Significance and Regulation of ERK5 Expression and Function in Cancer
Matilde Monti1, Jacopo Celli2, Francesco Missale1,3
1Department of Molecular and Translational Medicine, University of Brescia, 25100 Brescia, Italy.
Abstract:
Extracellular signal-regulated kinase 5 (ERK5) is a unique kinase among MAPKs family members, given its large structure characterized by the presence of a unique C-terminal domain. Despite increasing data demonstrating the relevance of the ERK5 pathway in the growth, survival, and differentiation of normal cells, ERK5 has recently attracted the attention of several research groups given its relevance in inflammatory disorders and cancer. Accumulating evidence reported its role in tumor initiation and progression. In this review, we explore the gene expression profile of ERK5 among cancers correlated with its clinical impact, as well as the prognostic value of ERK5 and pERK5 expression levels in tumors. We also summarize the importance of ERK5 in the maintenance of a cancer stem-like phenotype and explore the major known contributions of ERK5 in the tumor-associated microenvironment. Moreover, although several questions are still open concerning ERK5 molecular regulation, different ERK5 isoforms derived from the alternative splicing process are also described, highlighting the potential clinical relevance of targeting ERK5 pathways.
Insights
Extracellular signal-regulated kinase 5 (ERK5) is crucial in normal cell functions and increasingly implicated in cancer development and progression. This review highlights ERK5
Area of Science:
- Molecular Biology
- Cell Signaling
- Oncology
Background:
- Extracellular signal-regulated kinase 5 (ERK5) is a unique MAPK family member with a significant role in normal cell growth, survival, and differentiation.
- ERK5 is increasingly recognized for its involvement in inflammatory disorders and various cancers, influencing tumor initiation and progression.
Purpose of the Study:
- To review the gene expression profile of ERK5 in cancers and its correlation with clinical impact.
- To evaluate the prognostic value of ERK5 and phosphorylated ERK5 (pERK5) expression in tumors.
- To summarize ERK5's role in cancer stem-like cell maintenance and the tumor microenvironment.
Main Methods:
- Literature review of studies investigating ERK5 expression, clinical impact, and prognostic value in cancer.
- Analysis of gene expression profiles and their correlation with cancer outcomes.
- Summary of research on ERK5's role in cancer stemness and the tumor microenvironment.
Main Results:
- ERK5 expression profiles correlate with clinical impact across various cancers.
- ERK5 and pERK5 levels serve as potential prognostic markers in tumors.
- ERK5 is vital for maintaining cancer stem-like phenotypes and influences the tumor microenvironment.
Conclusions:
- ERK5 plays a significant role in cancer initiation, progression, and the tumor microenvironment.
- ERK5 and its isoforms represent potential therapeutic targets for cancer treatment.
- Further research into ERK5's molecular regulation and alternative splicing is warranted for clinical applications.
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