Overexpression of pyruvate dehydrogenase kinase supports dichloroacetate as a candidate for cutaneous melanoma therapy

• Tipo: Artigo em Revista Científica Internacional
• Data: 2015

Autores

Helena Populo (Autor) Outra; Regina Caldas (Autor) Outra; Lopes, JM (Autor) FMUP; Joana Pardal (Autor) Outra; Valdemar Maximo (Autor) Outra; Paula Soares (Autor) FMUP

Revista

Título: Expert Opinion on Therapeutic Targets

Vol. 19

Páginas: 733-745

ISSN: 1472-8222

Editora: Taylor & Francis

Indexação

ISI Web of Knowledge - 24 Citações

Scopus - 25 Citações

Classificação Científica

FOS: Ciências médicas e da saúde > Medicina básica

Outras Informações

ID Authenticus: P-00G-56E

DOI: 10.1517/14728222.2015.1045416

Abstract (EN): Objective: We aimed to verify if there is evidence to consider dichloroacetate (DCA), which inhibits the pyruvate dehydrogenase kinase (PDK) and reverts the metabolic shift of cancer cells from glycolysis to oxidative phosphorylation, as a promising drug for therapy of cutaneous melanoma (CM) patients. Research design and methods: We assessed the expression profile of PDK 1, 2 and 3 in a series of melanoma samples, to verify if melanoma tumors express the DCA targets, if this expression correlates with the activation of important signaling cascades for melanomagenesis and also with the prognosis of melanoma patients. We also established the sensitivity of melanoma cell lines to DCA treatment, by assessing their metabolic alterations, proliferation and survival. Results: We observed that both PDK 1 and 2 isoforms are overexpressed in CM compared to nevi, this expression being associated with the expression of the mTOR pathway effectors and independent of the BRAF mutational status. Melanoma cell lines treated with DCA showed a shift in metabolism, that is, a decrease in glucose consumption and lactate production, downregulation of proliferation, an increase of apoptosis and a decrease in mTOR pathway activation. Conclusion: Our results suggest that PDK expression may play a role in melanoma development and that DCA can be useful for CM therapy, alone or in combination with mTOR inhibitors.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 13