Isothiouronium Salts Reduce NRAS Expression, Induce Apoptosis and Decrease Invasion of Melanoma Cells

ISSN: 1875-5992 (Online)
ISSN: 1871-5206 (Print)

Volume 17, 14 Issues, 2017

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Anti-Cancer Agents in Medicinal Chemistry

Formerly: Current Medicinal Chemistry - Anti-Cancer Agents

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Michelle Prudhomme
Institut de Chimie de Clermont-Ferrand
Université Clermont Auvergne

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Isothiouronium Salts Reduce NRAS Expression, Induce Apoptosis and Decrease Invasion of Melanoma Cells

Anti-Cancer Agents in Medicinal Chemistry, 15(3): 353-362.

Author(s): Julia Cisilotto, Misael Ferreira, Fabiola Branco Filippin-Monteiro, Adailton Joao Bortoluzzi, Marcus Mandolesi Sa and Tania Beatriz Creczynski-Pasa.

Affiliation: Departamento de Ciencias Farmaceuticas, Universidade Federal de Santa Catarina, 88040-900 Florianopolis, SC, Brazil.


Melanoma is a very aggressive type of skin cancer. Mutation in BRAF and NRAS are often found in patients with this disease. Therefore, in recent years the search for new molecules that inhibit these proteins has been intensified. After many years with no new treatments for melanoma, the U.S. Food and Drug Administration (FDA) recently approved vemurafenib. However, many patients have already acquired resistance and have experienced severe side effects. Therefore, this work aims to evaluate a new set of compounds including allylic isothiouronium salts (1, 2 and 3), N-phenyl-substituted analog (4) and isothiosemicarbazide salts (5 and 6) for their potential antimelanoma activity. To this end, viability assay, cell cycle analysis, expression of NRAS and BRAF, as well as migration and invasion assay were performed with different melanoma cell lines. Isothiouronium salts 1-3 presented CC50 (concentration required to reduce the cell number by 50%) in a range of 7-28 μM. Furthermore, salt 1 significantly decreased the expression of NRAS. However, cells incubated with these salts did not disturb the cell cycle phases; instead, an increase in the number of apoptotic cells was observed. Regarding potential antiinvasion effects, both 1 and 2 prevented cell migration as well as cell invasion. Finally, when salts 1 and 2 were associated with vemurafenib, a marked decrease in cell viability was observed when compared to the compounds incubated alone. Briefly, the salts exhibited interesting results, especially 1, which decreased the expression of NRAS, increased apoptotic cells and, when combined with vemurafenib, resulted in a synergistic effect. Therefore, we intend to test compound 1 in pre-clinical studies.


Anti-invasion activity, antitumoral action, cytotoxicity, expression of NRAS, isothiouronium salts, melanoma cells.

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Article Details

Volume: 15
Issue Number: 3
First Page: 353
Last Page: 362
Page Count: 10
DOI: 10.2174/1871520614666141130125148
Price: $58

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