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A 3D Organotypic Melanoma Spheroid Skin Model
Published on: May 18, 2018
Overcoming resistance to targeted therapy with immunotherapy and combination therapy for metastatic melanoma
Hilary R Keller1,2,3,4, Xin Zhang4, Li Li4
1The University of Queensland School of Medicine, Ochsner Clinical School, Brisbane, QLD, Australia.
Abstract:
Resistance to targeted therapy is an ongoing problem for the successful treatment of Stage IV metastatic melanoma. For many patients, the use of targeted therapies, such as BRAF kinase inhibitors, were initially promising yet resistance inevitably occurred. Even after combining BRAF kinase inhibitors with MEK pathway inhibitors to offset re-activation of the MAP kinase pathway, resistance is still documented. Similarly, outcomes with immune checkpoint inhibitors as monotherapy were optimistic for some patients without relapse or progression, yet the majority of patients undergoing monotherapy have progressive disease. Will immunotherapy and combination therapy trials overcome resistance in metastatic melanoma? In an effort to treat resistant disease, new clinical trials evaluating the combination of immunotherapy with other therapies, such as kinase inhibitors, adoptive cell therapy, chimeric CD40 ligand to boost costimulation, or a tumor-specific oncolytic virus enhancing granulocyte macrophage colony-stimulating factor (GM-CSF) expression, are currently underway. Updated studies on the mechanisms of resistance, immune escape and options to reinvigorate immune cells support the continued discovery of new and improved forms of therapy.
Insights
Targeted therapies and immunotherapies show limited success against metastatic melanoma due to resistance. Combination therapies are being investigated to overcome these challenges in melanoma treatment.
Area of Science:
- Oncology
- Immunology
- Pharmacology
Background:
- Metastatic melanoma treatment faces significant challenges due to acquired resistance to targeted therapies and immunotherapies.
- BRAF kinase inhibitors and MEK pathway inhibitors, while initially effective, often lead to eventual resistance.
- Immune checkpoint inhibitors, used as monotherapy, show limited durable responses in the majority of patients with advanced melanoma.
Purpose of the Study:
- To explore the potential of novel combination therapies to overcome treatment resistance in Stage IV metastatic melanoma.
- To review current clinical trials investigating combinations of immunotherapy with other treatment modalities.
- To highlight ongoing research into resistance mechanisms and immune evasion in melanoma.
Main Methods:
- Review of current clinical trials for metastatic melanoma combining immunotherapy with targeted agents, adoptive cell therapy, or oncolytic viruses.
- Analysis of emerging research on mechanisms of resistance and immune escape in melanoma.
- Exploration of strategies to reinvigorate anti-tumor immune responses.
Main Results:
- New clinical trials are actively evaluating combinations of immunotherapy with kinase inhibitors, adoptive cell therapy, chimeric CD40 ligand, and oncolytic viruses.
- Understanding of resistance mechanisms and immune escape pathways is continually advancing.
- Strategies to enhance immune cell function are being developed to combat resistant melanoma.
Conclusions:
- Combination therapies hold promise for overcoming resistance in metastatic melanoma.
- Continued research into novel therapeutic strategies and understanding resistance mechanisms is crucial for improving patient outcomes.
- Future directions include combining immunotherapy with diverse agents to achieve durable responses in advanced melanoma.
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