Research Papers:

Reprogramming human A375 amelanotic melanoma cells by catalase overexpression: Reversion or promotion of malignancy by inducing melanogenesis or metastasis

Candelaria Bracalente, Noelia Salguero, Cintia Notcovich, Carolina B. Müller, Leonardo L. da Motta, Fabio Klamt, Irene L. Ibañez and Hebe Durán _

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Oncotarget. 2016; 7:41142-41153. https://doi.org/10.18632/oncotarget.9220

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Candelaria Bracalente1,2, Noelia Salguero1, Cintia Notcovich1, Carolina B. Müller3, Leonardo L. da Motta3, Fabio Klamt3, Irene L. Ibañez1,2, Hebe Durán1,2,4

1Departamento de Micro y Nanotecnología, Comisión Nacional de Energía Atómica, San Martín, Buenos Aires, B1650KNA, Argentina

2Consejo Nacional de Investigaciones Científicas y Tecnológicas, Buenos Aires, C1033AAJ, Argentina

3Laboratório de Bioquímica Celular, Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, 90035 003, Brasil

4Escuela de Ciencia y Tecnología, Universidad Nacional de San Martín, San Martín, Buenos Aires, B1650HMP, Argentina

Correspondence to:

Hebe Durán, email: hduran@cnea.gov.ar

Keywords: melanoma, catalase, ROS, melanogenesis and metastasis

Received: October 27, 2015     Accepted: March 28, 2016     Published: May 07, 2016


Advanced melanoma is the most aggressive form of skin cancer. It is highly metastatic and dysfunctional in melanogenesis; two processes that are induced by H2O2. This work presents a melanoma cell model with low levels of H2O2 induced by catalase overexpression to study differentiation/dedifferentiation processes. Three clones (A7, C10 and G10) of human A375 amelanotic melanoma cells with quite distinct phenotypes were obtained. These clones faced H2O2 scavenging by two main strategies. One developed by clone G10 where ROS increased. This resulted in G10 migration and metastasis associated with the increased of cofilin-1 and CAP1. The other strategy was observed in clone A7 and C10, where ROS levels were maintained reversing malignant features. Particularly, C10 was not tumorigenic, while A7 reversed the amelanotic phenotype by increasing melanin content and melanocytic differentiation markers. These clones allowed the study of potential differentiation and migration markers and its association with ROS levels in vitro and in vivo, providing a new melanoma model with different degree of malignancy.

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