Distinct Splicing Signatures Affect Converged Pathways in Myelodysplastic Syndrome Patients Carrying Mutations in Different Splicing Regulators
Downloaded from rnajournal.cshlp.org on September 30, 2021 - Published by Cold Spring Harbor Laboratory Press Distinct splicing signatures affect converged pathways in myelodysplastic syndrome patients carrying mutations in different splicing regulators JINSONG QIU,1,7 BING ZHOU,1,7 FELICITAS THOL,2 YU ZHOU,1 LIANG CHEN,1 CHANGWEI SHAO,1 CHRISTOPHER DEBOEVER,3 JIAYI HOU,4 HAIRI LI,1 ANUHAR CHATURVEDI,2 ARNOLD GANSER,2 RAFAEL BEJAR,5 DONG-ER ZHANG,6 XIANG-DONG FU,1,3 and MICHAEL HEUSER2 1Department of Cellular and Molecular Medicine, School of Medicine, University of California, San Diego, La Jolla, California 92093, USA 2Department of Hematology, Hemostasis, Oncology and Stem cell Transplantation, Hannover Medical School, 30625 Hannover, Germany 3Institute for Genomic Medicine, University of California, San Diego, La Jolla, California 92093, USA 4Clinical and Translational Research Institute, University of California, San Diego, La Jolla, California 92093, USA 5Division of Hematology-Oncology, Moores Cancer Center, University of California, San Diego, La Jolla, California 92093, USA 6Department of Pathology, Moores Cancer Center, University of California, San Diego, La Jolla, California 92093, USA ABSTRACT Myelodysplastic syndromes (MDS) are heterogeneous myeloid disorders with prevalent mutations in several splicing factors, but the splicing programs linked to specific mutations or MDS in general remain to be systematically defined. We applied RASL-seq, a sensitive and cost-effective platform, to interrogate 5502 annotated splicing events in 169 samples from MDS patients or healthy individuals. We found that splicing signatures associated with normal hematopoietic lineages are largely related to cell signaling and differentiation programs, whereas MDS-linked signatures are primarily involved in cell cycle control and DNA damage responses.
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