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Updated: Sep 13, 2025
A 3D Organotypic Melanoma Spheroid Skin Model
Published on: May 18, 2018
Hydroxytyrosol Reprograms the Tumor Microenvironment in 3D Melanoma Models by Suppressing ERBB Family and Kinase
David Tovar-Parra1,2, Marion Zammit Mangion1,3
1Department of Physiology and Biochemistry, Faculty of Medicine and Surgery, University of Malta, MSD 2080 Msida, Malta.
Abstract:
Malignant cutaneous melanoma is among the most aggressive forms of skin cancer, characterized by high metastatic potential and frequent resistance to standard therapies. Hydroxytyrosol, a phenolic compound derived from extra virgin olive oil, has shown promising anticancer properties in various models, yet its effects in 3D melanoma systems remain poorly understood. In this study, we used paired 3D spheroid models of non-tumorigenic (HEMa) and melanoma (C32) to assess the therapeutic potential of hydroxytyrosol. To evaluate the anti-tumoral effect of hydroxytyrosol, we performed cytotoxicity, metastasis, invasiveness, cell cycle arrest, apoptotic, and proteomic assays. Hydroxytyrosol treatment significantly impaired spheroid growth, reduced cell viability, and induced cell cycle arrest and apoptosis in C32 spheroids, with minimal cytotoxicity observed in HEMa models. Proteomic profiling further demonstrated that hydroxytyrosol selectively downregulated a network of oncogenic proteins, including ERBB2, ERBB3, ERBB4, VEGFR-2, and WIF-1, along with suppression of downstream PI3K-Akt and MAPK/ERK signaling pathways. In conclusion, compared to dabrafenib, hydroxytyrosol exerted a broader range of molecular effects and was more selective toward tumor cells. These findings support the use of hydroxytyrosol as a multi-targeted agent capable of attenuating melanoma progression through suppression of kinase signaling and tumor-stromal interactions.
Insights
Hydroxytyrosol, an olive oil compound, effectively combats melanoma by inhibiting cancer cell growth and key signaling pathways. It shows promise as a targeted therapy with broader effects than dabrafenib.
Area of Science:
- Oncology
- Pharmacology
- Molecular Biology
Background:
- Malignant cutaneous melanoma is an aggressive skin cancer with high metastatic potential and treatment resistance.
- Hydroxytyrosol, from olive oil, exhibits anticancer properties, but its efficacy in 3D melanoma models is largely unknown.
Purpose of the Study:
- To investigate the therapeutic potential of hydroxytyrosol in 3D melanoma spheroid models.
- To evaluate hydroxytyrosol's effects on melanoma cell viability, metastasis, invasiveness, cell cycle, apoptosis, and proteomic profiles.
Main Methods:
- Utilized paired 3D spheroid models of non-tumorigenic (HEMa) and melanoma (C32) cells.
- Performed cytotoxicity, metastasis, invasiveness, cell cycle arrest, apoptotic, and proteomic assays.
- Compared hydroxytyrosol's effects with dabrafenib.
Main Results:
- Hydroxytyrosol significantly inhibited C32 spheroid growth, reduced viability, induced cell cycle arrest, and promoted apoptosis.
- Minimal cytotoxicity was observed in HEMa models, indicating selectivity.
- Proteomic analysis revealed downregulation of oncogenic proteins (ERBB2, ERBB3, ERBB4, VEGFR-2, WIF-1) and suppressed PI3K-Akt/MAPK/ERK pathways.
Conclusions:
- Hydroxytyrosol demonstrates multi-targeted anti-melanoma effects by suppressing kinase signaling and tumor-stromal interactions.
- Hydroxytyrosol exhibits broader molecular activity and greater selectivity towards tumor cells compared to dabrafenib.
- These findings support hydroxytyrosol as a potential therapeutic agent for melanoma progression.
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