0000000000925047

AUTHOR

L Di Marcotullio

showing 2 related works from this author

Noncanonical GLI1 signaling promotes stemness features and in vivo growth in lung adenocarcinoma

2016

Aberrant Hedgehog/GLI signaling has been implicated in a diverse spectrum of human cancers, but its role in lung adenocarcinoma (LAC) is still under debate. We show that the downstream effector of the Hedgehog pathway, GLI1, is expressed in 76% of LACs, but in roughly half of these tumors, the canonical pathway activator, Smoothened, is expressed at low levels, possibly owing to epigenetic silencing. In LAC cells including the cancer stem cell compartment, we show that GLI1 is activated noncanonically by MAPK/ERK signaling. Different mechanisms can trigger the MAPK/ERK/GLI1 cascade including KRAS mutation and stimulation of NRP2 by VEGF produced by the cancer cells themselves in an autocrin…

0301 basic medicineMAPK/ERK pathwayCancer ResearchLung NeoplasmsPyridinesPyridineMitogen-Activated Protein Kinase KinaseMice SCIDMiceCarcinoma Non-Small-Cell LungRNA Small InterferingNon-Small-Cell LungMolecular Biology; Genetics; Cancer ResearchTumorbiologyintegumentary systemHedgehog signaling pathwayCell biologyNeoplastic Stem CellsFemaleRNA InterferenceOriginal ArticleHumanXenograft Model Antitumor AssayAdenocarcinomaSCIDSmall InterferingZinc Finger Protein GLI1Cell LineProto-Oncogene Proteins p21(ras)Adenocarcinoma; Animals; Carcinoma Non-Small-Cell Lung; Cell Line Tumor; Female; Humans; Lung Neoplasms; Mice; Mice SCID; Mitogen-Activated Protein Kinase Kinases; Neoplastic Stem Cells; Neuropilin-2; Proto-Oncogene Proteins p21(ras); Pyridines; Pyrimidines; RNA Interference; RNA Small Interfering; Xenograft Model Antitumor Assays; Zinc Finger Protein GLI1; Molecular Biology; Genetics; Cancer Research03 medical and health sciencesParacrine signallingGeneticSettore MED/04 - PATOLOGIA GENERALEstem cellsCancer stem cellGLI1Cell Line TumorGeneticsAnimalsHumansAutocrine signallingMolecular BiologyMitogen-Activated Protein Kinase KinasesSettore MED/06 - ONCOLOGIA MEDICAAnimalCarcinomaXenograft Model Antitumor AssaysNeuropilin-2Lung Neoplasmlung cancer030104 developmental biologyPyrimidinesPyrimidineCancer cellbiology.proteinRNANeoplastic Stem CellSmoothened
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The MRN complex is transcriptionally regulated by MYCN during neural cell proliferation to control replication stress

2015

The MRE11/RAD50/NBS1 (MRN) complex is a major sensor of DNA double strand breaks, whose role in controlling faithful DNA replication and preventing replication stress is also emerging. Inactivation of the MRN complex invariably leads to developmental and/or degenerative neuronal defects, the pathogenesis of which still remains poorly understood. In particular, NBS1 gene mutations are associated with microcephaly and strongly impaired cerebellar development, both in humans and in the mouse model. These phenotypes strikingly overlap those induced by inactivation of MYCN, an essential promoter of the expansion of neuronal stem and progenitor cells, suggesting that MYCN and the MRN complex migh…

0301 basic medicineDNA ReplicationTranscription GeneticDNA damageDNA repairDNA-Binding ProteinCell Cycle ProteinsBiology03 medical and health sciencesMRE11 Homologue ProteinCell Cycle ProteinStrand-Break Repair; N-Myc; Dna-Replication; Human Neuroblastoma; Feingold-Syndrome; C-Myc; Mre11-Rad50-Nbs1 Complex; Targeted Disruption; Genomic Instability; Embryonic LethalityHumansProgenitor cellMolecular BiologyneoplasmsCells CulturedNuclear ProteinCell ProliferationGeneticsNeuronsOncogene ProteinsOriginal PaperMRE11 Homologue ProteinN-Myc Proto-Oncogene ProteinCell growthDNA Repair EnzymeDNA replicationOncogene ProteinNuclear ProteinsCell BiologyNeuronCell biologyAcid Anhydride HydrolasesDNA-Binding Proteins030104 developmental biologyDNA Repair EnzymesMRN complexGene Expression RegulationRad50HumanCell Death and Differentiation
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