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Exploiting the potential of autophagy in cisplatin therapy: A new strategy to overcome resistance

2015; Impact Journals LLC; Volume: 6; Issue: 17 Linguagem: Inglês

10.18632/oncotarget.3902

1949-2553

Jesús García‐Cano, Gorbatchev Ambroise, Raquel Pascual‐Serra, M. Carmen Carrión, Leticia Serrano‐Oviedo, Marta Ortega‐Muelas, Francisco J. Cimas, S. Sabater, María José Ruiz‐Hidalgo, Isabel Sánchez‐Pérez, Antonio Más, Félix A. Jalón, Aimé Vázquez, Ricardo Sánchez‐Prieto,

MicroRNA in disease regulation

// Jesús García-Cano 1 , Gorbatchev Ambroise 2, * , Raquel Pascual-Serra 1, * , Maria Carmen Carrión 3, 4 , Leticia Serrano-Oviedo 1 , Marta Ortega-Muelas 1 , Francisco J. Cimas 1 , Sebastià Sabater 5 , María José Ruiz-Hidalgo 6, 7 , Isabel Sanchez Perez 8, 7 , Antonio Mas 1, 7, 9 , Félix A. Jalón 3 , Aimé Vazquez 2 , Ricardo Sánchez-Prieto 1, 4, 7 1 Unidad de Medicina Molecular, Centro Regional de Investigaciones Biomédicas. Universidad de Castilla-La Mancha, Albacete, Spain 2 INSERM U.1197/Université Paris-Sud/Equipe Labellisée Ligue Nationale Contre le Cancer, Hôpital Paul Brousse, Villejuif, France 3 Departamento de Química Inorgánica, Orgánica y Bioquímica, UCLM. Facultad de Ciencias y Tecnologías Químicas-IRICA, Ciudad Real, Spain 4 Fundación Parque Científico y Tecnológico de Castilla-La Mancha, Albacete, Spain 5 Radiation Oncology Department, Complejo Hospitalario Universitario Albacete (CHUA), Spain 6 Departamento de Química Orgánica, Inorgánica y Bioquímica, Facultad de Medicina, Albacete, Spain 7 Unidad asociada de Biomedicina, UCLM-CSIC, Albacete, Spain 8 Department of Biochemistry, School of Medicine, UAM/Biomedical Research Institute of Madrid, Madrid CSIC/UAM, Madrid, Spain 9 Facultad de Farmacia, Universidad de Castilla-La Mancha, Albacete, Spain * These authors have contributed equally to this work Correspondence to: Ricardo Sánchez-Prieto, e-mail: Ricardo.Sanchez@uclm.es Keywords: cisplatin, apoptosis, autophagy, synthetic lethality, monoplatin Received: April 10, 2015 Accepted: April 24, 2015 Published: May 06, 2015 ABSTRACT Resistance to cisplatin is a major challenge in the current cancer therapy. In order to explore new therapeutic strategies to cisplatin resistance, we evaluated, in a model of lung cancer (H1299 and H460 cell lines), the nature of the pathways leading to cell death. We observed that H1299 displayed a natural resistance to cisplatin due to an inability to trigger an apoptotic response that correlates with the induction of autophagy. However, pharmacological and genetic approaches showed how autophagy was a mechanism associated to cell death rather than to resistance. Indeed, pro-autophagic stimuli such as mTOR or Akt inhibition mediate cell death in both cell lines to a similar extent. We next evaluated the response to a novel platinum compound, monoplatin, able to promote cell death in an exclusive autophagy-dependent manner. In this case, no differences were observed between both cell lines. Furthermore, in response to monoplatin, two molecular hallmarks of cisplatin response (p53 and MAPKs) were not implicated, indicating the ability of this pro-autophagic compound to overcome cisplatin resistance. In summary, our data highlight how induction of autophagy could be used in cisplatin resistant tumours and an alternative treatment for p53 mutated patient in a synthetic lethally approach.