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Updated: Jul 7, 2026

Spatial and Temporal Control of Murine Melanoma Initiation from Mutant Melanocyte Stem Cells
Published on: June 7, 2019
The MAPK pathway in melanoma
Leslie A Fecher1, Ravi K Amaravadi, Keith T Flaherty
1University of Pennsylvania, Division of Hematology and Oncology, Department of Medicine, The Abramson Cancer Center, Philadelphia, Pennsylvania 19104, USA. leslie.fecher@uphs.upenn.edu
Purpose Of Review:
As understanding of molecular and genetic processes in cancer evolves, so does appreciation of tumor heterogeneity. Tumor profiling has expanded knowledge of relevant pathways, and their interplay. Similar to the revolution in breast cancer with the discovery and successful therapeutic targeting of HER2/neu, the melanoma field is rapidly evolving. The MAPK pathway is dysregulated in most melanomas. Several therapeutic agents directed against this pathway are in development. This review summarizes current understanding of the MAPK pathway in melanoma biology and therapeutic strategies.
Recent Findings:
Recent data support the concept of distinct groups of molecular and genetic abnormalities in melanomas, related to type of sun exposure and body site. MAPK abnormalities, specifically BRAF or NRAS mutations, are most prevalent. The efficacy of sorafenib, a multitargeted kinase inhibitor, in melanoma is still under evaluation. While ineffective as a single agent, efficacy in combination with chemotherapy or targeted agents is being assessed. More specific inhibitors of BRAF, or other MAPK members, may prove more effective.
Summary:
Tumor profiling has led to exciting advances. The MAPK pathway is one of several potentially targetable pathways in melanoma. Ultimately, combinatorial therapeutics against relevant disrupted pathways in specific tumors likely will prove most successful.
Insights
Understanding the MAPK pathway in melanoma is crucial for developing new cancer therapies. Targeting this pathway, particularly BRAF mutations, shows promise for effective melanoma treatment.
Area of Science:
- Oncology
- Molecular Biology
- Genetics
Background:
- Cancer research is increasingly focused on tumor heterogeneity and molecular profiling.
- The MAPK pathway is frequently dysregulated in melanoma, similar to HER2/neu in breast cancer.
- Advances in understanding melanoma genetics are driving the development of targeted therapies.
Purpose of the Study:
- To review the current understanding of the MAPK pathway in melanoma.
- To summarize therapeutic strategies targeting the MAPK pathway in melanoma.
- To highlight the role of tumor profiling in advancing melanoma treatment.
Main Methods:
- Review of current scientific literature on melanoma biology and MAPK pathway.
- Analysis of genetic abnormalities and their correlation with clinical presentation.
- Evaluation of therapeutic agents targeting the MAPK pathway.
Main Results:
- Melanomas exhibit distinct molecular and genetic abnormalities linked to sun exposure and body site.
- BRAF or NRAS mutations are the most common MAPK pathway abnormalities in melanoma.
- Targeted inhibitors of BRAF and other MAPK pathway members show potential efficacy.
Conclusions:
- Tumor profiling has significantly advanced melanoma research.
- The MAPK pathway is a key target for melanoma therapeutics.
- Combinatorial therapies targeting multiple disrupted pathways are likely to be most successful.
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