Reference

junio15Epigenetic activation of a cryptic TBC1D16 transcript enhances melanoma progression by targeting EGFR. Nat. Med. in press (2015)

Authors

Miguel Vizoso, Humberto J Ferreira, Paula Lopez-Serra, F Javier Carmona, Anna Martínez-Cardús,Maria Romina Girotti, Alberto Villanueva, Sonia Guil, Catia Moutinho, Julia Liz, Anna Portela,Holger Heyn, Sebastian Moran, August Vidal, Maria Martinez-Iniesta, Jose L Manzano,Maria Teresa Fernandez-Figueras, Elena Elez, Eva Muñoz-Couselo, Rafael Botella-Estrada,Alfonso Berrocal, Fredrik Pontén, Joost van den Oord, William M Gallagher, Dennie T Frederick,Keith T Flaherty, Ultan McDermott, Paul Lorigan, Richard Marais y Manel Esteller

Abstract

Metastasis is responsible for most cancer-related deaths, and, among common tumor types, melanoma is one with great potential to metastasize. Here we study the contribution of epigenetic changes to the dissemination process by analyzing the changes that occur at the DNA methylation level between primary cancer cells and metastases. We found a hypomethylation event that reactivates a cryptic transcript of the Rab GTPase activating protein TBC1D16 (TBC1D16-47 kDa; referred to hereafter as TBC1D16-47KD) to be a characteristic feature of the metastatic cascade. This short isoform of TBC1D16 exacerbates melanoma growth and metastasis both in vitro and in vivo. By combining immunoprecipitation and mass spectrometry, we identified RAB5C as a new TBC1D16 target and showed that it regulates EGFR in melanoma cells. We also found that epigenetic reactivation of TBC1D16-47KD is associated with poor clinical outcome in melanoma, while conferring greater sensitivity to BRAF and MEK inhibitors.

Description

En el presente estudio se ha identificado la reactivación epigenética de una variante génica durmiente en tejidos sanos, íntimamente ligada al proceso de metastatización de los tumores de melanoma. Dicha modificación ha demostrado tener potentes implicaciones en su capacidad de predecir la evolución de los pacientes a la enfermedad y la respuesta a los actuales tratamientos que se suministran actualmente en la clínica.

fotojulio2015

REFERENCIA DEL GRUPO INVESTIGADOR

El grupo de Epigenética del Cáncer del Instituto de Investigación Biomédica de Bellvitge (IDIBELL) dirigido por el Dr. Manel Esteller tiene como objetivo la investigación de las alteraciones de la metilación del DNA, las modificaciones de histonas y el RNA no codificante de proteínas (ncRNAs), para encontrar la relación de estos fenómenos con el desarrollo del cáncer en humanos. En concreto el investigador Miguel Vizoso se centra en el estudio de marcadores epigenéticos basados en la metilación del ADN que se puedan emplear para una mejor estratificación de los pacientes aquejados de melanoma metastásico así como de desenmascarar los mecanismos moleculares de resistencia generados en los pacientes a los fármacos que se les suministran para combatir la enfermedad.

Descárgate este artículo aquí.

Did you publish an interesting article recently?

Send it through our application form and we will contact you. Age limit: 32.

The selected articles will participate at the Award to the best article of young people of the SEBBM which will be given during SEBBM conference, that will take place at Spain (free registration, travel and accommodation).

More articles of the month

Astrocytic mitochondrial ROS modulate brain metabolism and mouse behaviour

01-07-2019

To satisfy its high energetic demand, the brain depends on the metabolic cooperation of various cell types. For example, astrocytic-derived lactate sustains memory consolidation by serving both as an oxidizable...

Read more

Glucose restriction promotes osteocyte specification by activating a PGC-1α-dependent transcriptional program

03-06-2019

Osteocytes, the most abundant of bone cells, differentiate while they remain buried within the bone matrix. This encasement limits their access to nutrients and likely affects their differentiation, a process...

Read more

ParB dynamics and the critical role of the CTD in DNA condensation unveiled by combined force-fluorescence measurements

01-05-2019

/Bacillus subtilis/ ParB forms multimeric networks involving non-specific DNA binding leading to DNA condensation. Previously, we found that an excess of the free C-terminal domain (CTD) of ParB impeded DNA...

Read more

Therapeutic targeting of HER2-CB2R heteromers in HER2-positive breast cancer

01-04-2019

Although human epidermal growth factor receptor 2 (HER2)-targeted therapies have dramatically improved the clinical outcome of HER2-positive breast cancer patients, innate and acquired resistance remains an important clinical challenge. New...

Read more

p73 regulates ependymal planar cell polarity by modulating actin and microtubule cytoskeleton

01-03-2019

Planar cell polarity (PCP) and intercellular junctional complexes establish tissue structure and coordinated behaviors across epithelial sheets. In multiciliated ependymal cells, rotational and translational PCP coordinate cilia beating and direct...

Read more

β‐RA reduces DMQ/CoQ ratio and rescues the encephalopathic phenotype in Coq9R239X mice

01-02-2019

Coenzyme Q (CoQ) deficiency has been associated with primary defects in the CoQ biosynthetic pathway or to secondary events. In some cases, the exogenous CoQ supplementation has limited efficacy. In...

Read more

Small molecule inhibits α-synuclein aggregation, disrupts amyloid fibrils, and prevents degeneration of dopaminergic neurons

02-01-2019

Parkinson's disease (PD) is characterized by a progressive loss of dopaminergic neurons, a process that current therapeutic approaches cannot prevent. In PD, the typical pathological hallmark is the accumulation of...

Read more

Dynamic acetylation of cytosolic phosphoenolpyruvate carboxykinase toggles enzyme activity between gluconeogenic and anaplerotic reactions

01-12-2018

Cytosolic phosphoenolpyruvate carboxykinase (PCK1) is considered a gluconeogenic enzyme; however, its metabolic functions and regulatory mechanisms beyond gluconeogenesis are poorly understood. Here, we describe that dynamic acetylation of PCK1 interconverts...

Read more

The Helicase PIF1 Facilitates Resection overSequences Prone to Forming G4 Structures

02-11-2018

DNA breaks are complex lesions that can be repaired either by non-homologous end joining (NHEJ) or by homologous recombination (HR). The decision between these two routes of DNA repair is...

Read more

Preventing loss of mechanosensation by the nuclear membranes of alveolar cells reduces lung injury in mice during mechanical ventilation

01-10-2018

The nuclear membrane acts as a mechanosensor that drives cellular responses following changes in the extracellular environment. Mechanically ventilated lungs are exposed to an abnormally high mechanical load that may...

Read more

Protector Members