PMID- 33486841 OWN - NLM STAT- MEDLINE DCOM- 20220310 LR - 20220310 IS - 1098-2264 (Electronic) IS - 1045-2257 (Linking) VI - 60 IP - 6 DP - 2021 Jun TI - Unbalanced translocation der(5;17) resulting in a TP53 loss as recurrent aberration in myelodysplastic syndrome and acute myeloid leukemia with complex karyotype. PG - 452-457 LID - 10.1002/gcc.22938 [doi] AB - A complex karyotype, detected in myelodysplastic syndrome (MDS) and acute myeloid leukaemia (AML), is associated with a reduced median survival. The most frequent chromosomal aberrations in complex karyotypes are deletions of 5q and 17p harboring the tumor suppressor gene TP53. The unbalanced translocation der(5;17) involving chromosome 5q and 17p is a recurrent aberration in MDS/AML, resulting in TP53 loss. We analyzed the karyotypes of 178 patients with an unbalanced translocation der(5;17) using fluorescence R-/G-banding analysis. Whenever possible, fluorescence in situ hybridization (FISH) (n = 138/141), multicolor FISH (n = 8), telomere length measurement (n = 9), targeted DNA sequencing (n = 13), array-CGH (n = 7) and targeted RNA sequencing (n = 2) were conducted. The der(5;17) aberration was accompanied with loss of genetic material in 7q (53%), -7 (27%), gain of 21q (29%), +8 (17%) and - 18 (16%) and all analyzed patients (n = 13) showed a (likely) pathogenic variant inTP53. The der(5;17) cohort showed significantly shortened telomeres in comparison to the healthy age-matched controls (P < .05), but there was no significant telomere shortening in comparison to MDS/AML patients with a complex karyotype without der(5;17). No fusion genes resulted from the unbalanced translocation. This study demonstrates that the unbalanced translocation der(5;17) is associated with a biallelic inactivation of TP53 due to a deletion of TP53 in one allele and a pathogenic variant of the second TP53 allele. Since the breakpoints are located within (near-) heterochromatic regions, alterations of DNA methylation or histone modifications may be involved in the generation of der(5;17). CI - (c) 2021 The Authors. Genes, Chromosomes & Cancer published by Wiley Periodicals LLC. FAU - Warnstorf, Daria AU - Warnstorf D AD - Department of Human Genetics, Hannover Medical School, Hannover, Germany. FAU - Bawadi, Randa AU - Bawadi R AD - Department of Human Genetics, Hannover Medical School, Hannover, Germany. FAU - Schienke, Andrea AU - Schienke A AD - Department of Human Genetics, Hannover Medical School, Hannover, Germany. FAU - Strasser, Renate AU - Strasser R AD - Department of Human Genetics, Hannover Medical School, Hannover, Germany. FAU - Schmidt, Gunnar AU - Schmidt G AD - Department of Human Genetics, Hannover Medical School, Hannover, Germany. FAU - Illig, Thomas AU - Illig T AD - Department of Human Genetics, Hannover Medical School, Hannover, Germany. FAU - Tauscher, Marcel AU - Tauscher M AD - Department of Human Genetics, Hannover Medical School, Hannover, Germany. FAU - Thol, Felicitas AU - Thol F AD - Department of Haematology, Haemostasis, Oncology and Stem Cell Transplantation, Hannover Medical School, Hannover, Germany. FAU - Heuser, Michael AU - Heuser M AD - Department of Haematology, Haemostasis, Oncology and Stem Cell Transplantation, Hannover Medical School, Hannover, Germany. FAU - Steinemann, Doris AU - Steinemann D AUID- ORCID: 0000-0001-8797-0816 AD - Department of Human Genetics, Hannover Medical School, Hannover, Germany. FAU - Davenport, Claudia AU - Davenport C AD - Department of Human Genetics, Hannover Medical School, Hannover, Germany. FAU - Schlegelberger, Brigitte AU - Schlegelberger B AD - Department of Human Genetics, Hannover Medical School, Hannover, Germany. FAU - Behrens, Yvonne Lisa AU - Behrens YL AD - Department of Human Genetics, Hannover Medical School, Hannover, Germany. FAU - Gohring, Gudrun AU - Gohring G AUID- ORCID: 0000-0002-0863-8645 AD - Department of Human Genetics, Hannover Medical School, Hannover, Germany. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20210219 PL - United States TA - Genes Chromosomes Cancer JT - Genes, chromosomes & cancer JID - 9007329 RN - 0 (TP53 protein, human) RN - 0 (Tumor Suppressor Protein p53) SB - IM MH - Abnormal Karyotype MH - Adolescent MH - Adult MH - Aged MH - Aged, 80 and over MH - Child MH - Chromosomes, Human, Pair 17/*genetics MH - Chromosomes, Human, Pair 5/*genetics MH - Female MH - Humans MH - Leukemia, Myeloid, Acute/*genetics/pathology MH - Male MH - Middle Aged MH - Myelodysplastic Syndromes/*genetics/pathology MH - *Translocation, Genetic MH - Tumor Suppressor Protein p53/*genetics OTO - NOTNLM OT - AML OT - MDS OT - TP53 OT - complex karyotype OT - unbalanced translocation EDAT- 2021/01/25 06:00 MHDA- 2022/03/11 06:00 CRDT- 2021/01/24 20:54 PHST- 2021/01/08 00:00 [revised] PHST- 2020/08/14 00:00 [received] PHST- 2021/01/11 00:00 [accepted] PHST- 2021/01/25 06:00 [pubmed] PHST- 2022/03/11 06:00 [medline] PHST- 2021/01/24 20:54 [entrez] AID - 10.1002/gcc.22938 [doi] PST - ppublish SO - Genes Chromosomes Cancer. 2021 Jun;60(6):452-457. doi: 10.1002/gcc.22938. Epub 2021 Feb 19.