ArticleCell reports. Medicine2024
Concurrent SOS1 and MEK suppression inhibits signaling and growth of NF1-null melanoma.
Article in Cell reports. Medicine, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 5 papers.
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Who cites it
5 citing papers in PubMed.
- Targeted therapeutic strategies forTranslational lung cancer research · 2026Review
- SOS1: tracking the evolving path from promising to actionable therapeutic target in RAS-dependent cancers.Molecular cancer · 2026Review
- Penetrative biomimetic nanovehicle boosts immunotherapy in triple-negative breast cancer via SOS1 blockade.Asian journal of pharmaceutical sciences · 2025Article
- Combination Immunotherapy for Mucosal Melanoma: Molecular Mechanism, Research Status, and Future Directions.Current treatment options in oncology · 2025Review
- Opportunities, obstacles and challenges of nano-immunotherapy in melanoma.Frontiers in immunology · 2025Review
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Authors and funding
22 authors.
Funding
Abstract
Neurofibromin (NF1) is a negative regulator of RAS signaling, frequently mutated in cancer. NF1-mutant melanoma is a highly malignant tumor for which targeted therapies are lacking. Here, we use biochemical and pharmacological assays on patient-derived models and isogenic cell lines to identify potential pharmacologic targets, revealing that NF1-null melanomas are dependent on RAS activation and that MEK inhibition relieves ERK-dependent negative feedback, increasing RAS signaling. MEK inhibition with avutometinib abrogates the adaptive rebound in ERK signaling, but the antitumor effects are limited. However, concurrent inhibition of MEK and SOS1 abrogates ERK activation, induces cell death, and suppresses tumor growth. In contrast to the NF1-deficient setting, concurrent SOS1 and SOS2 depletion is required to completely inhibit RAS signaling in NF1 wild-type cells. In sum, our data provide a mechanistic rationale for enhancing the therapeutic efficacy of MEK inhibitors by exploiting the lower residual SOS activity in NF1-null tumor cells.
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