Cancer / Oncology/BRAF-driven melanoma
Skin · subtype
BRAF-driven melanoma
Subtype of Melanoma
Clinical / Scientific
BRAF V600 creates addiction. BRAF/MEK inhibition is established. Adaptive EGFR/RTK feedback and phenotype switching drive resistance.
Core Biological Drivers
BRAF V600
lock.
Key Pathways
Scientific explanation
RAS GTPases and RAF kinases are frequent oncogenic nodes. KRAS, NRAS and BRAF mutations lock mitogenic signalling on in a ligand-independent way in many tumours.
Scientific explanation
The RAS–RAF–MEK–ERK cascade transmits mitogenic RTK signals to programmes for proliferation and differentiation.
Scientific explanation
phosphorylates PIP2 to PIP3, recruiting . supports growth, survival, glucose uptake and mTORC1 input. Pathway activation is common via PIK3CA mutation, PTEN loss or -tyrosine- signalling.
Scientific explanation
recycles organelles and can support survival under nutrient or therapy stress. Context determines tumour-suppressive versus therapy-protective roles.
Pathway Convergence
Target → pathway → downstream effect → biological consequence. Shared intersections are mechanistic maps, not protocols.
Growth-factor signalling
Ligand or mutation-driven RTK input feeds PI3K/AKT and mTORC1, supporting anabolic growth. This is a map of signalling, not a treatment protocol.
Metabolic Vulnerabilities
Aerobic supports ATP, biomass and acidification even when oxygen is available. Extent varies by tumour and remains a vulnerability hypothesis rather than a uniform target.
Tumor Microenvironment
Tumour-associated macrophages and myeloid-derived suppressor cells secrete cytokines that support invasion and blunt cytotoxic T cells.
Metastasis Module
, protease-mediated invasion, , circulating tumour-cell survival and organ-specific colonization form the metastatic cascade. Pre-metastatic niches and vascular permeability influence tropism.
Resistance Biology
reactivation and MITF-low switching.
Cancer Stemness
Wnt, Notch, Hedgehog, ALDH and CD44-associated programmes can mark stem-like fractions with quiescence and therapy tolerance. These markers are not interchangeable across tumour types.
Mechanism-Based Adjunctive Strategies
Compounds appear only where a mechanistic overlap exists for this cancer. Evidence tiers are not equivalent. Nothing here is a treatment recommendation.
Target / Mechanism
Lysosomotropic agent that raises endosomal/autophagosomal pH, impairing flux. Combination trials in oncology have been mixed; blockade is not equivalent to proven benefit.
Cancer relevance
Lysosomal pH elevation impairs flux. Early combination trials exist; benefit is not established and toxicity/retinal risk remain labelled concerns.
Autophagy-modulation research combinations. Convergence: Autophagy.
Statins (HMG-CoA reductase inhibitors)
Target / Mechanism
Inhibit HMG-CoA reductase, depleting mevalonate-pathway isoprenoids needed for RAS/RHO prenylation and some sterol-dependent growth programmes. Observational oncology signals are mixed and not a licence to treat cancer with statins.
Cancer relevance
Mevalonate-pathway blockade can affect prenylation of RAS-family GTPases. Observational human signals are mixed and confounding is substantial.
Mevalonate / prenylation mechanistic overlap. Convergence: RAS/RAF, Fatty-acid metabolism.
Propranolol
Target / Mechanism
Non-selective β-adrenergic . Adrenergic signalling can support and invasion in some tumours; selected clinical experiences (e.g. infantile haemangioma is established vascular biology, oncology uses are a different question).
Cancer relevance
β-adrenergic signalling can support and invasion in selected tumours. Oncology uses remain investigational except where a specific vascular indication is separately established.
Adrenergic / vascular adjunctive research. Convergence: Angiogenesis, Invasion.
Research Context
- BRAF. Davies H, et al. Mutations of the BRAF gene in human cancer. Nature. 2002;417(6892):949-954. https://doi.org/10.1038/nature00766
- Resistance. Holohan C, Van Schaeybroeck S, Longley DB, Johnston PG. Cancer drug resistance: an evolving paradigm. Nat Rev Cancer. 2013;13(10):714-726. https://doi.org/10.1038/nrc3599
This oncology atlas is educational. Pathway maps, adjunctive strategies, and compound listings describe mechanistic relevance. They do not establish clinical efficacy, do not recommend treatment, and are not a substitute for oncology care. Evidence tiers are not equivalent.