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Fatty-monastrol derivatives and its cytotoxic effect against melanoma cell growth
Milene Medeiros de Moraes1, Tamara Germani Marinho Treptow2, Wystan Kreisly Othon Teixeira2
1Laboratório de Cultura Celular, Programa de Pós-graduação em Ciências Fisiológicas, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande - FURG, Rio Grande do Sul, Brazil.
Abstract:
Melanoma is the most dangerous type of skin cancer due to the occurrence of metastases. This work is aimed at studying the effects of the insertion of palmitic and oleic acid chain into monastrol in the melanoma cell line, B16F10. Cells were treated with monastrol, palmitic-monastrol or oleic-monastrol for periods of 0, 24, 48 and 72 h, and the cytotoxic effect was observed for palmitic-monastrol and oleic-monastrol after 24 h. For monastrol the effects were observed in 48 h on B16F10 cells, and in 24 h for a non-tumour cell line, melan-a. In this cell line, fatty-monastrol derivatives were cytotoxic after 24 h of exposure in the same concentrations as B16F10. However, oleic-monastrol inhibited cell growth at 20µM only after 72 h, in contrast to the B16F10 cell line, in which oleic-monastrol inhibited cell growth at 48 h, showing that at least in this structural modification, melan-a was less sensitive than B16F10. The ability of compounds to induce apoptosis and/or necrosis was measured, and it was observed that monastrol induces apoptosis within 24 h. However, the cells treated with fatty-monastrol derivatives did not remain adhered on the well plate after 3 h of treatment. At this time point, these cells still emitted fluorescence indicating viable cells, suggesting a possible effect of palmitic- and oleic-monastrol in the adhesion proteins found on the cell membrane.
Insights
Researchers modified monastrol with fatty acids to study melanoma. Palmitic- and oleic-monastrol showed cytotoxicity in melanoma cells within 24 hours, suggesting potential for new cancer treatments.
Area of Science:
- Biochemistry
- Cancer Biology
- Pharmacology
Background:
- Melanoma is an aggressive skin cancer characterized by metastasis.
- Monastrol is a known inhibitor of the mitotic kinesin Eg5.
- Fatty acid modifications of drug molecules can alter their pharmacokinetic and pharmacodynamic properties.
Purpose of the Study:
- To investigate the cytotoxic effects of palmitic-monastrol and oleic-monastrol on the B16F10 melanoma cell line.
- To compare the sensitivity of melanoma cells (B16F10) and non-tumorigenic melanocytes (melan-a) to these novel compounds.
- To explore the mechanism of cell death induced by these modified monastrol derivatives.
Main Methods:
- Treatment of B16F10 and melan-a cell lines with monastrol, palmitic-monastrol, and oleic-monastrol at various concentrations and time points (0, 24, 48, 72 h).
- Assessment of cell viability and cytotoxic effects using standard assays.
- Measurement of apoptosis and/or necrosis induction.
- Observation of cell adhesion properties.
Main Results:
- Palmitic-monastrol and oleic-monastrol exhibited cytotoxic effects on B16F10 cells within 24 hours.
- Monastrol showed effects on B16F10 cells at 48 hours and on melan-a cells at 24 hours.
- Fatty-monastrol derivatives caused reduced cell adhesion within 3 hours, despite initial indications of viability.
Conclusions:
- Fatty acid modification of monastrol enhances its cytotoxic activity against melanoma cells.
- The melan-a cell line demonstrated less sensitivity to oleic-monastrol compared to B16F10 cells.
- Fatty-monastrol derivatives may interfere with cell adhesion mechanisms, warranting further investigation into their anti-metastatic potential.
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