The Notch driven long non-coding RNA repertoire in T-cell acute lymphoblastic leukemia

Autor: Kaat Durinck, Annelynn Wallaert, Inge Van de Walle, Wouter Van Loocke, Pieter-Jan Volders, Suzanne Vanhauwaert, Ellen Geerdens, Yves Benoit, Nadine Van Roy, Bruce Poppe, Jean Soulier, Jan Cools, Pieter Mestdagh, Jo Vandesompele, Pieter Rondou, Pieter Van Vlierberghe, Tom Taghon, Frank Speleman
Jazyk: angličtina
Rok vydání: 2014
Předmět:
Zdroj: Haematologica, Vol 99, Iss 12 (2014)
Druh dokumentu: article
ISSN: 0390-6078
1592-8721
DOI: 10.3324/haematol.2014.115683
Popis: Genetic studies in T-cell acute lymphoblastic leukemia have uncovered a remarkable complexity of oncogenic and loss-of-function mutations. Amongst this plethora of genetic changes, NOTCH1 activating mutations stand out as the most frequently occurring genetic defect, identified in more than 50% of T-cell acute lymphoblastic leukemias, supporting a role as an essential driver for this gene in T-cell acute lymphoblastic leukemia oncogenesis. In this study, we aimed to establish a comprehensive compendium of the long non-coding RNA transcriptome under control of Notch signaling. For this purpose, we measured the transcriptional response of all protein coding genes and long non-coding RNAs upon pharmacological Notch inhibition in the human T-cell acute lymphoblastic leukemia cell line CUTLL1 using RNA-sequencing. Similar Notch dependent profiles were established for normal human CD34+ thymic T-cell progenitors exposed to Notch signaling activity in vivo. In addition, we generated long non-coding RNA expression profiles (array data) from ex vivo isolated Notch active CD34+ and Notch inactive CD4+CD8+ thymocytes and from a primary cohort of 15 T-cell acute lymphoblastic leukemia patients with known NOTCH1 mutation status. Integration of these expression datasets with publicly available Notch1 ChIP-sequencing data resulted in the identification of long non-coding RNAs directly regulated by Notch activity in normal and malignant T cells. Given the central role of Notch in T-cell acute lymphoblastic leukemia oncogenesis, these data pave the way for the development of novel therapeutic strategies that target hyperactive Notch signaling in human T-cell acute lymphoblastic leukemia.
Databáze: Directory of Open Access Journals
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