Metalloproteinases Suppression Driven by the Curcumin Analog DM-1 Modulates Invasion in BRAF-Resistant Melanomas

Author(s):

Nayane de Souza, Érica Aparecida de Oliveira, Fernanda Faião-Flores, Luciana A. Pimenta, José A.P. Quincoces, Sandra C. Sampaio and Silvya S. Maria-Engler*   Pages 1038 - 1050 ( 13 )

Abstract:

Background: Melanoma is the most aggressive skin cancer, and BRAF (V600E) is the most frequent mutation that led to the development of BRAF inhibitors (BRAFi). However, patients treated with BRAFi usually present recidivism after 6-9 months. Curcumin is a turmeric substance, and it has been deeply investigated due to its anti-inflammatory and antitumoral effects. Still, the low bioavailability and biodisponibility encouraged the investigation of different analogs. DM-1 is a curcumin analog and has shown an antitumoral impact in previous studies. <p></p> Methods: Evaluated DM-1 stability and cytotoxic effects for BRAFi-sensitive and resistant melanomas, as well as the role in the metalloproteinases modulation. <p></p> Results: DM-1 showed growth inhibitory potential for melanoma cells, demonstrated by reduction of colony formation, migration and endothelial tube formation, and cell cycle arrest. Subtoxic doses were able to downregulate important Metalloproteinases (MMPs) related to invasiveness, such as MMP-1, -2 and -9. Negative modulations of TIMP-2 and MMP-14 reduced MMP-2 and -9 activity; however, the reverse effect is seen when increased TIMP-2 and MMP-14 resulted in raised MMP-2. <p></p> Conclusion: These findings provide essential details into the functional role of DM-1 in melanomas, encouraging further studies in the development of combinatorial treatments for melanomas.

Keywords:

Curcumin-analogue, DM-1, melanoma, BRAF resistance, vemurafenib, BRAF inhibitor.

Affiliation:

Skin Biology Group, Clinical Chemistry and Toxicology Department, School of Pharmaceutical Sciences, University of Sao Paulo, FCF/USP, Skin Biology Group, Clinical Chemistry and Toxicology Department, School of Pharmaceutical Sciences, University of Sao Paulo, FCF/USP, Skin Biology Group, Clinical Chemistry and Toxicology Department, School of Pharmaceutical Sciences, University of Sao Paulo, FCF/USP, Butantan Institute, Pathophysiology Laboratory, Sao Paulo, Laboratory of Organic Synthesis, Anhanguera University of São Paulo, UNIAN, Sao Paulo, Butantan Institute, Pathophysiology Laboratory, Sao Paulo, Skin Biology Group, Clinical Chemistry and Toxicology Department, School of Pharmaceutical Sciences, University of Sao Paulo, FCF/USP

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