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The p38 Pathway: From Biology to Cancer Therapy
Adrián Martínez-Limón1,2, Manel Joaquin1,2, María Caballero1,2
1Institute for Research in Biomedicine (IRB Barcelona), The Barcelona Institute of Science and Technology, Baldiri Reixac, 10, 08028 Barcelona, Spain.
Abstract:
The p38 MAPK pathway is well known for its role in transducing stress signals from the environment. Many key players and regulatory mechanisms of this signaling cascade have been described to some extent. Nevertheless, p38 participates in a broad range of cellular activities, for many of which detailed molecular pictures are still lacking. Originally described as a tumor-suppressor kinase for its inhibitory role in RAS-dependent transformation, p38 can also function as a tumor promoter, as demonstrated by extensive experimental data. This finding has prompted the development of specific inhibitors that have been used in clinical trials to treat several human malignancies, although without much success to date. However, elucidating critical aspects of p38 biology, such as isoform-specific functions or its apparent dual nature during tumorigenesis, might open up new possibilities for therapy with unexpected potential. In this review, we provide an extensive description of the main biological functions of p38 and focus on recent studies that have addressed its role in cancer. Furthermore, we provide an updated overview of therapeutic strategies targeting p38 in cancer and promising alternatives currently being explored.
Insights
The p38 mitogen-activated protein kinase (MAPK) pathway regulates cellular stress responses. Its dual role in cancer, acting as both a tumor suppressor and promoter, presents therapeutic challenges and opportunities.
Area of Science:
- Molecular Biology
- Cell Signaling
- Oncology
Background:
- The p38 MAPK pathway is a critical mediator of cellular responses to environmental stress.
- While its basic functions are known, detailed molecular mechanisms in various cellular activities remain unclear.
- p38 MAPK has a complex, context-dependent role in cancer, acting as both a tumor suppressor and promoter.
Purpose of the Study:
- To provide a comprehensive overview of p38 MAPK's biological functions.
- To focus on recent research elucidating p38's role in cancer development and progression.
- To review current therapeutic strategies targeting p38 in malignancies and explore novel approaches.
Main Methods:
- Literature review of existing studies on p38 MAPK signaling.
- Analysis of experimental data regarding p38's function in tumorigenesis.
- Synthesis of information on clinical trials and emerging therapeutic strategies.
Main Results:
- p38 MAPK exhibits a dual role in cancer, influencing tumor suppression and promotion.
- Clinical trials targeting p38 MAPK for cancer treatment have shown limited success to date.
- Understanding isoform-specific functions and the dual nature of p38 is crucial for therapeutic advancement.
Conclusions:
- Elucidating the complex biology of p38 MAPK, including its isoform-specific roles, is essential for developing effective cancer therapies.
- Further research into the dual nature of p38 MAPK may unlock new therapeutic avenues.
- Novel strategies targeting the p38 pathway hold promise for future cancer treatment.
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