51. Mutation-Independent Activation of the Anaplastic Lymphoma Kinase in Neuroblastoma
- Author
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Stefan Michiels, Dominique Valteau-Couanet, Fabienne Munier, José Courty, Jean Delbé, Céline Renauleaud, Hervé Sartelet, Virginie Marty, M. Castaing, Gilles Vassal, Monique Fabre, Shigeru Ohta, Philippe Viehl, Camille Doux, Marie Regairaz, Laboratoire de Biologie et de Pharmacologie Appliquée (LBPA), École normale supérieure - Cachan (ENS Cachan)-Centre National de la Recherche Scientifique (CNRS), Centre Hospitalier Universitaire [Grenoble] (CHU), Laboratoire de recherche translationnelle, Direction de la recherche [Gustave Roussy], Institut Gustave Roussy (IGR)-Institut Gustave Roussy (IGR), Croissance cellulaire, réparation et régénération tissulaires (CRRET), Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), Laboratoire CRRET, EAC/CNRS-7149, Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12), Service d'anatomie pathologique [CHU Necker], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-CHU Necker - Enfants Malades [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Centre de recherche en épidémiologie et santé des populations (CESP), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Université Paris-Sud - Paris 11 (UP11)-Hôpital Paul Brousse-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ), Département de Pédiatrie, Institut Gustave Roussy (IGR), Pharmacologie et nouveaux traitements des cancers, Université Paris-Sud - Paris 11 (UP11)-Institut Gustave Roussy (IGR), and Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Université Paris-Sud - Paris 11 (UP11)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpital Paul Brousse-Institut National de la Santé et de la Recherche Médicale (INSERM)
- Subjects
0301 basic medicine ,Male ,Adolescent ,medicine.drug_class ,Pyridines ,[SDV.CAN]Life Sciences [q-bio]/Cancer ,Pleiotrophin ,medicine.disease_cause ,Pathology and Forensic Medicine ,03 medical and health sciences ,Neuroblastoma ,hemic and lymphatic diseases ,Cell Line, Tumor ,medicine ,Anaplastic lymphoma kinase ,Humans ,Anaplastic Lymphoma Kinase ,Phosphorylation ,Child ,Protein Kinase Inhibitors ,Mass screening ,ComputingMilieux_MISCELLANEOUS ,Cell Proliferation ,Midkine ,biology ,Chemistry ,Cell growth ,Infant, Newborn ,Infant ,Receptor Protein-Tyrosine Kinases ,medicine.disease ,Molecular biology ,ALK inhibitor ,030104 developmental biology ,Cell Transformation, Neoplastic ,Child, Preschool ,Mutation ,Cancer research ,biology.protein ,Female ,Carcinogenesis ,Signal Transduction - Abstract
Activating mutations of anaplastic lymphoma kinase ( ALK ) have been identified as important players in neuroblastoma development. Our goal was to evaluate the significance of overall ALK activation in neuroblastoma. Expression of phosphorylated ALK, ALK, and its putative ligands, pleiotrophin and midkine, was screened in 289 neuroblastomas and 56 paired normal tissues. ALK was expressed in 99% of tumors and phosphorylated in 48% of cases. Pleiotrophin and midkine were expressed in 58% and 79% of tumors, respectively. ALK activation was significantly higher in tumors than in paired normal tissues, together with ALK and midkine expression. ALK activation was largely independent of mutations and correlated with midkine expression in tumors. ALK activation in tumors was associated with favorable features, including a younger age at diagnosis, hyperdiploidy, and detection by mass screening. Antitumor activity of the ALK inhibitor TAE684 was evaluated in wild-type or mutated ALK neuroblastoma cell lines and xenografts. TAE684 was cytotoxic in vitro in all cell lines, especially those harboring an ALK mutation. TAE684 efficiently inhibited ALK phosphorylation in vivo in both F1174I and R1275Q xenografts but demonstrated antitumor activity only against the R1275Q xenograft. In conclusion, ALK activation occurs frequently during neuroblastoma oncogenesis, mainly through mutation-independent mechanisms. However, ALK activation is not associated with a poor outcome and is not always a driver of cell proliferation and/or survival in neuroblastoma.
- Published
- 2016