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lüll Chronic lymphocytic leukemia: interplay between noncoding RNAs and protein-coding genes Calin GA; Croce CMBlood 2009[Nov]; 114 (23): 4761-70One of the most unexpected and fascinating discoveries in oncology over the past few years is the interplay between abnormalities in protein-coding genes and noncoding RNAs (ncRNAs) that is causally involved in cancer initiation, progression, and dissemination. MicroRNAs (miRNAs), small regulatory ncRNAs, are involved in the pathogenesis of all types of human cancers, including leukemias, mainly via dysregulation of expression of cancer genes. Increasing evidence shows that miRNAs can work as tumor suppressors (inhibiting malignant potential) or oncogenes (activating malignant potential). Researchers first identified this new paradigm of molecular oncology in patients with chronic lymphocytic leukemia (CLL). Understanding the roles of miRNAs and other ncRNAs in leukemic cells is not only uncovering a new layer of gene regulation but also providing new markers for improved diagnosis and prognosis, as well as novel therapeutic options for CLL patients. Herein we focus on the roles of miRNAs and ultraconserved ncRNA genes in CLL, highlighting what is already known about their function, proposing a novel model of CLL predisposition and progression, and describing the challenges for the near future.|*Gene Expression Regulation, Neoplastic/genetics[MESH]|*Genes, Neoplasm[MESH]|Animals[MESH]|Apoptosis/genetics[MESH]|B-Lymphocyte Subsets/metabolism/pathology[MESH]|Cell Hypoxia/genetics[MESH]|Chromosome Aberrations[MESH]|Conserved Sequence[MESH]|Disease Progression[MESH]|Drug Delivery Systems[MESH]|Forecasting[MESH]|Gene Regulatory Networks[MESH]|Genes, Tumor Suppressor[MESH]|Humans[MESH]|Leukemia, Lymphocytic, Chronic, B-Cell/diagnosis/*genetics/therapy[MESH]|Mammals/genetics[MESH]|MicroRNAs/genetics/physiology[MESH]|Neoplasm Proteins/genetics/*physiology[MESH]|Neovascularization, Pathologic/genetics[MESH]|Oncogenes[MESH]|RNA, Untranslated/genetics/*physiology[MESH]|Signal Transduction/genetics[MESH] |