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Atypical MAPKs in cancer
Katrin Dahm1, Parthiban Vijayarangakannan2, Hans-Peter Wollscheid1
1Cell Biology Unit, University Medical Center Mainz, JGU-Mainz, Germany.
Abstract:
Impaired kinase signalling leads to various diseases, including cancer. At the same time, kinases make up the majority of the druggable genome and targeting kinase activity has proven to be a successful first-line therapy for many cancers. Among the best-studied kinases are the mitogen-activated protein kinases (MAPKs), which regulate cell proliferation, differentiation, motility, and survival. However, the MAPK family also contains the atypical members ERK3 (MAPK6), ERK4 (MAPK4), ERK7/ERK8 (MAPK15), and NLK that are functionally and structurally different from their conventional family members and have long been neglected. Nevertheless, in recent years, important roles in carcinogenesis, actin cytoskeleton regulation and the immune system have been discovered, underlining the physiological importance of atypical MAPKs and the need to better understand their functions. This review highlights the distinctive features of the atypical MAPKs and summarizes the evidence on their regulation, physiological roles, and potential targeting strategies for cancer therapies.
Insights
Atypical mitogen-activated protein kinases (MAPKs) have crucial roles in cancer and immunity. This review explores their unique features, functions, and potential as cancer therapy targets.
Area of Science:
- Molecular Biology
- Cell Biology
- Oncology
Background:
- Kinase signaling is vital in cell functions and implicated in diseases like cancer.
- Mitogen-activated protein kinases (MAPKs) are key regulators, but atypical members remain understudied.
- Targeting kinases is a successful cancer therapy strategy.
Purpose of the Study:
- To review the distinctive features of atypical MAPKs.
- To summarize their regulation, physiological roles, and involvement in cancer.
- To explore potential targeting strategies for cancer therapies.
Main Methods:
- Literature review of atypical MAPK research.
- Analysis of their unique structural and functional characteristics.
- Synthesis of evidence on their roles in carcinogenesis and immunity.
Main Results:
- Atypical MAPKs (ERK3, ERK4, ERK7/8, NLK) differ significantly from conventional MAPKs.
- Emerging evidence highlights their importance in cancer, cytoskeleton regulation, and immune responses.
- Their distinctiveness suggests unique therapeutic vulnerabilities.
Conclusions:
- Atypical MAPKs are physiologically important and implicated in cancer.
- Further research into their functions is needed for novel cancer treatment strategies.
- Targeting atypical MAPKs represents a promising avenue for future cancer therapies.
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