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RESEARCH PRODUCT

Differential expression of specific microRNA and their targets in acute myeloid leukemia

Luigi AugugliaroGabriele CivilettoDomenico SalemiAnna MarfiaCecilia AgueliPietro Michele FloridiaMaria La RosaGiuseppe CammarataAngelo MineoMario RussoFrancesco FabbianoFrancesca MessanaAlessandra SantoroMaria Grazia BicaLea DagninoLucia Cascio

subject

AdultMaleNPM1Down-RegulationBiologySettore MED/15 - Malattie Del SangueYoung Adulthemic and lymphatic diseasesmicroRNAmedicineGene silencingHumansLeukemia microarray data microRNAGranulocyte Precursor CellsAgedCell ProliferationGeneticsRegulation of gene expressionAged 80 and overAcute leukemiaReverse Transcriptase Polymerase Chain ReactionGene Expression ProfilingCore Binding FactorsMyeloid leukemiaNuclear ProteinsCell DifferentiationHematologyMiddle Agedmedicine.diseaseUp-RegulationGene expression profilingGene Expression Regulation NeoplasticLeukemiaLeukemia Myeloid AcuteMicroRNAsfms-Like Tyrosine Kinase 3Case-Control StudiesMutationFemaleSettore SECS-S/01 - StatisticaNucleophosmin

description

Acute myeloid leukemia (AML) the most common acute leukemia in adults is characterized by various cytogenetic and molecular abnormalities. However, the genetic etiology of the disease is not yet fully understood. MicroRNAs (miRNA) are small noncoding RNAs which regulate the expression of target mRNAs both at transcriptional and translational level. In recent years, miRNAs have been identified as a novel mechanism in gene regulation, which show variable expression during myeloid differentiation. We studied miRNA expression of leukemic blasts of 29 cases of newly diagnosed and genetically defined AML using quantitative reverse transcription polymerase chain reaction (RT-PCR) for 365 human miRNA. We showed that miRNA expression profiling reveals distinctive miRNA signatures that correlate with cytogenetic and molecular subtypes of AML. Specific miRNAs with consolidated role on cell proliferation and differentiation such as miR-155, miR-221, let-7, miR-126 and miR-196b appear to be associated with particular subtypes. We observed a significant differentially expressed miRNA profile that characterizes two subgroups of AML with different mechanism of leukemogenesis: core binding factor (CBF) and cytogenetically normal AML with mutations in the genes of NPM1 and FLT3-ITD. We demonstrated, for the first time, the inverse correlation of expression levels between miRNA and their targets in specific AML genetic groups. We suggest that miRNA deregulation may act as complementary hit in the multisteps mechanism of leukemogenesis offering new therapeutic strategies.

yearjournalcountryeditionlanguage
2010-04-29
10.1002/ajh.21667http://hdl.handle.net/10447/50291