PMID- 29672642 OWN - NLM STAT- MEDLINE DCOM- 20180723 LR - 20181114 IS - 1932-6203 (Electronic) IS - 1932-6203 (Linking) VI - 13 IP - 4 DP - 2018 TI - RUNX1-PDCD6 fusion resulting from a novel t(5;21)(p15;q22) chromosome translocation in myelodysplastic syndrome secondary to chronic lymphocytic leukemia. PG - e0196181 LID - 10.1371/journal.pone.0196181 [doi] LID - e0196181 AB - Leukemic cells often carry chromosome aberrations which generate chimeric genes of pathogenetic, diagnostic, and prognostic importance. New rearrangements giving rise to novel fusion genes define hitherto unrecognized genetic leukemia subgroups. G-banding, fluorescence in situ hybridization (FISH), and molecular genetic analyses were done on bone marrow cells from a patient with chronic lymphocytic leukemia (CLL) and secondary myelodysplasia. The G-banding analysis revealed the karyotype 46,XX,del(21)(q22)[9]/46,XX[2]. FISH on metaphase spreads with a RUNX1 break apart probe demonstrated that part of RUNX1 (from 21q22) had moved to chromosome band 5p15. RNA sequencing showed in-frame fusion of RUNX1 with PDCD6 (from 5p15), something that was verified by RT-PCR together with Sanger sequencing. Further FISH analyses with PDCD6 and RUNX1 home-made break apart/double fusion probes showed a red signal (PDCD6) on chromosome 5, a green signal on chromosome 21 (RUNX1), and two yellow fusion signals, one on der(5) and the other on der(21). Reassessment of the G-banding preparations in light of the FISH and RNA-sequencing data thus yielded the karyotype 46,XX,t(5;21)(p15;q22)[9]/46,XX[2]. The t(5;21)(p15;q22)/RUNX1-PDCD6 was detected only by performing molecular studies of the leukemic cells, but should be sought after also in other leukemic/myelodysplastic cases with del(21q). FAU - Panagopoulos, Ioannis AU - Panagopoulos I AUID- ORCID: 0000-0003-2159-5341 AD - Section for Cancer Cytogenetics, Institute for Cancer Genetics and Informatics, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway. FAU - Gorunova, Ludmila AU - Gorunova L AD - Section for Cancer Cytogenetics, Institute for Cancer Genetics and Informatics, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway. FAU - Jacobsen, Eva-Marie AU - Jacobsen EM AD - Department of Haematology, Oslo University Hospital, Oslo, Norway. FAU - Andersen, Kristin AU - Andersen K AD - Section for Cancer Cytogenetics, Institute for Cancer Genetics and Informatics, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway. FAU - Micci, Francesca AU - Micci F AD - Section for Cancer Cytogenetics, Institute for Cancer Genetics and Informatics, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway. FAU - Heim, Sverre AU - Heim S AD - Section for Cancer Cytogenetics, Institute for Cancer Genetics and Informatics, The Norwegian Radium Hospital, Oslo University Hospital, Oslo, Norway. AD - Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway. LA - eng PT - Case Reports PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20180419 PL - United States TA - PLoS One JT - PloS one JID - 101285081 RN - 0 (Apoptosis Regulatory Proteins) RN - 0 (Calcium-Binding Proteins) RN - 0 (Core Binding Factor Alpha 2 Subunit) RN - 0 (Oncogene Proteins, Fusion) RN - 0 (PDCD6 protein, human) RN - 0 (RUNX1 protein, human) SB - IM MH - Amino Acid Sequence MH - Apoptosis Regulatory Proteins/*genetics MH - Calcium-Binding Proteins/*genetics MH - Chromosome Banding MH - Chromosomes, Human, Pair 21 MH - Chromosomes, Human, Pair 5 MH - Core Binding Factor Alpha 2 Subunit/*genetics MH - Female MH - Humans MH - In Situ Hybridization, Fluorescence MH - Leukemia, Lymphocytic, Chronic, B-Cell/*genetics/*pathology MH - Middle Aged MH - Myelodysplastic Syndromes/diagnosis/*etiology MH - Oncogene Proteins, Fusion/*genetics MH - Sequence Analysis, DNA MH - *Translocation, Genetic PMC - PMC5908135 COIS- Competing Interests: The authors have declared that no competing interests exist. EDAT- 2018/04/20 06:00 MHDA- 2018/07/24 06:00 PMCR- 2018/04/19 CRDT- 2018/04/20 06:00 PHST- 2018/01/15 00:00 [received] PHST- 2018/04/06 00:00 [accepted] PHST- 2018/04/20 06:00 [entrez] PHST- 2018/04/20 06:00 [pubmed] PHST- 2018/07/24 06:00 [medline] PHST- 2018/04/19 00:00 [pmc-release] AID - PONE-D-18-01439 [pii] AID - 10.1371/journal.pone.0196181 [doi] PST - epublish SO - PLoS One. 2018 Apr 19;13(4):e0196181. doi: 10.1371/journal.pone.0196181. eCollection 2018.