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Updated: Sep 18, 2025
Preparation of Mitochondria from Ovarian Cancer Tissues and Control Ovarian Tissues for Quantitative Proteomics Analysis
Published on: November 18, 2019
Mitochondrial proteome landscape unveils key insights into melanoma severity and treatment strategies
Yonghyo Kim1,2, Viktória Doma3,4, Uğur Çakır3
1Division of Oncology, Department of Clinical Sciences Lund, Lund University, Lund, Sweden.
Background:
Melanoma, the deadliest form of skin cancer, exhibits resistance to conventional therapies, particularly in advanced and metastatic stages. Mitochondrial pathways, including oxidative phosphorylation and mitochondrial translation, have emerged as critical drivers of melanoma progression and therapy resistance. This study investigates the mitochondrial proteome in melanoma to uncover novel therapeutic vulnerabilities.
Methods:
Quantitative proteomics was performed on 151 melanoma-related samples from a prospective cohort and postmortem tissues. Differential expression analysis identified mitochondrial proteins linked to disease aggression and treatment resistance. Functional enrichment analyses and in vitro validation using mitochondrial inhibitors were conducted to evaluate therapeutic potential.
Results:
Mitochondrial translation and oxidative phosphorylation (OXPHOS) were significantly upregulated in aggressive melanomas, particularly in BRAF-mutant and metastatic tumors. Inhibition of mitochondrial pathways using antibiotics (doxycycline, tigecycline, and azithromycin) and OXPHOS inhibitors (VLX600, IACS-010759, and BAY 87-2243) demonstrated dose-dependent antiproliferative effects in melanoma cell lines, sparing noncancerous melanocytes. These treatments disrupted mitochondrial function, suppressed key metabolic pathways, and induced apoptosis, highlighting the clinical relevance of targeting these pathways.
Conclusions:
This study reveals mitochondrial pathways as critical drivers of melanoma progression and resistance, providing a rationale for targeting mitochondrial translation and OXPHOS in advanced melanoma. Combining mitochondrial inhibitors with existing therapies could overcome treatment resistance and improve patient outcomes.
Insights
Targeting mitochondrial pathways, including oxidative phosphorylation (OXPHOS) and mitochondrial translation, shows promise for treating aggressive melanoma. Inhibiting these pathways with specific drugs effectively reduced melanoma cell growth and induced apoptosis.
Area of Science:
- Oncology
- Molecular Biology
- Metabolomics
Background:
- Melanoma, a lethal skin cancer, often resists standard treatments, especially when advanced or metastatic.
- Mitochondrial functions like oxidative phosphorylation (OXPHOS) and translation are key to melanoma growth and drug resistance.
- Identifying vulnerabilities in the mitochondrial proteome is crucial for developing new melanoma therapies.
Purpose of the Study:
- To investigate the mitochondrial proteome in melanoma.
- To uncover novel therapeutic targets within mitochondrial pathways.
- To evaluate the potential of targeting mitochondrial function for melanoma treatment.
Main Methods:
- Quantitative proteomics was applied to 151 melanoma samples.
- Differential expression analysis identified mitochondrial proteins associated with melanoma aggressiveness and treatment resistance.
- In vitro studies validated therapeutic strategies using mitochondrial and OXPHOS inhibitors.
Main Results:
- Mitochondrial translation and OXPHOS were elevated in aggressive, metastatic, and BRAF-mutant melanomas.
- Antibiotics and OXPHOS inhibitors exhibited dose-dependent anti-melanoma effects, sparing normal cells.
- Targeted inhibition disrupted mitochondrial function, suppressed metabolism, and triggered apoptosis.
Conclusions:
- Mitochondrial pathways are critical drivers of melanoma progression and therapeutic resistance.
- Targeting mitochondrial translation and OXPHOS presents a viable strategy for advanced melanoma.
- Combination therapies involving mitochondrial inhibitors may overcome treatment resistance and improve outcomes.
