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Genomic analyses identify recurrent MEF2D fusions in acute lymphoblastic leukaemia

2016; Nature Portfolio; Volume: 7; Issue: 1 Linguagem: Inglês

10.1038/ncomms13331

2041-1723

Zhaohui Gu, Michelle L. Churchman, Kathryn G. Roberts, Yongjin Li, Yu Liu, Richard C. Harvey, Kelly McCastlain, Shalini C. Reshmi, Debbie Payne-Turner, Ilaria Iacobucci, Ying Shao, I‐Ming Chen, Marcus Valentine, Deqing Pei, Karen Mungall, Andrew J. Mungall, Yussanne Ma, Richard A. Moore, Marco A. Marra, Eileen Stonerock, Julie M. Gastier-Foster, Meenakshi Devidas, Yunfeng Dai, Brent L. Wood, Michael J. Borowitz, Eric E. Larsen, Kelly W. Maloney, Leonard A. Mattano, Anne Angiolillo, Wanda L. Salzer, Michael J. Burke, Francesca Gianni, Orietta Spinelli, Jerald P. Radich, Mark D. Minden, Anthony V. Moorman, Bella Patel, Adele K. Fielding, Jacob M. Rowe, Selina M. Luger, Ravi Bhatia, Ibrahim Aldoss, Stephen J. Forman, Jessica Kohlschmidt, Krzysztof Mrózek, Guido Marcucci, Clara D. Bloomfield, Wendy Stock, Steven M. Kornblau, Hagop M. Kantarjian, Marina Konopleva, Elisabeth Paietta, Cheryl L. Willman, Mignon L. Loh, Stephen P. Hunger, Charles G. Mullighan,

Childhood Cancer Survivors' Quality of Life

Abstract Chromosomal rearrangements are initiating events in acute lymphoblastic leukaemia (ALL). Here using RNA sequencing of 560 ALL cases, we identify rearrangements between MEF2D (myocyte enhancer factor 2D) and five genes ( BCL9 , CSF1R , DAZAP1 , HNRNPUL1 and SS18 ) in 22 B progenitor ALL (B-ALL) cases with a distinct gene expression profile, the most common of which is MEF2D-BCL9 . Examination of an extended cohort of 1,164 B-ALL cases identified 30 cases with MEF2D rearrangements, which include an additional fusion partner, FOXJ2 ; thus, MEF2D- rearranged cases comprise 5.3% of cases lacking recurring alterations. MEF2D- rearranged ALL is characterized by a distinct immunophenotype, DNA copy number alterations at the rearrangement sites, older diagnosis age and poor outcome. The rearrangements result in enhanced MEF2D transcriptional activity, lymphoid transformation, activation of HDAC9 expression and sensitive to histone deacetylase inhibitor treatment. Thus, MEF2D- rearranged ALL represents a distinct form of high-risk leukaemia, for which new therapeutic approaches should be considered.