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NEAT1 Long Isoform Is Highly Expressed in Chronic Lymphocytic Leukemia Irrespectively of Cytogenetic Groups or Clinical Outcome

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Department of Oncology and Hemato-oncology, University of Milan, 20122 Milan, Italy
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Hematology, Fondazione Cà Granda IRCCS Policlinico, 20122 Milan, Italy
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Mutagenesis and Cancer Prevention Unit, IRCCS Ospedale Policlinico San Martino, 16132 Genova, Italy
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Molecular Pathology Unit, IRCCS Ospedale Policlinico San Martino, 16132 Genova, Italy
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Hematology Unit, Department of Onco-Hematology A.O. of Cosenza, 87100 Cosenza, Italy
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Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, 08003 Barcelona, Catalonia, Spain
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Department of Experimental Medicine, University of Genoa, 16126 Genoa, Italy
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Unità di Ricerca Biotecnologica, Azienda Sanitaria Provinciale di Cosenza, 87051 Aprigliano (CS), Italy
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Department of Hematology and Bone Marrow Transplant Unit, Augusta Victoria Hospital, 97300 Jerusalem, Israel
*
Author to whom correspondence should be addressed.
Non-Coding RNA 2020, 6(1), 11; https://doi.org/10.3390/ncrna6010011
Received: 21 January 2020 / Revised: 19 February 2020 / Accepted: 8 March 2020 / Published: 13 March 2020
The biological role and therapeutic potential of long non-coding RNAs (lncRNAs) in chronic lymphocytic leukemia (CLL) are still open questions. Herein, we investigated the significance of the lncRNA NEAT1 in CLL. We examined NEAT1 expression in 310 newly diagnosed Binet A patients, in normal CD19+ B-cells, and other types of B-cell malignancies. Although global NEAT1 expression level was not statistically different in CLL cells compared to normal B cells, the median ratio of NEAT1_2 long isoform and global NEAT1 expression in CLL samples was significantly higher than in other groups. NEAT1_2 was more expressed in patients carrying mutated IGHV genes. Concerning cytogenetic aberrations, NEAT1_2 expression in CLL with trisomy 12 was lower with respect to patients without alterations. Although global NEAT1 expression appeared not to be associated with clinical outcome, patients with the lowest NEAT1_2 expression displayed the shortest time to first treatment; however, a multivariate regression analysis showed that the NEAT1_2 risk model was not independent from other known prognostic factors, particularly the IGHV mutational status. Overall, our data prompt future studies to investigate whether the increased amount of the long NEAT1_2 isoform detected in CLL cells may have a specific role in the pathology of the disease. View Full-Text
Keywords: NEAT1; Chronic Lymphocytic Leukemia; lncRNA NEAT1; Chronic Lymphocytic Leukemia; lncRNA
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Ronchetti, D.; Favasuli, V.; Monti, P.; Cutrona, G.; Fabris, S.; Silvestris, I.; Agnelli, L.; Colombo, M.; Menichini, P.; Matis, S.; Gentile, M.; Nurtdinov, R.; Guigó, R.; Baldini, L.; Fronza, G.; Ferrarini, M.; Morabito, F.; Neri, A.; Taiana, E. NEAT1 Long Isoform Is Highly Expressed in Chronic Lymphocytic Leukemia Irrespectively of Cytogenetic Groups or Clinical Outcome. Non-Coding RNA 2020, 6, 11.

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