Genetic Variant Screening of DNA Repair Genes in Myelodysplastic Syndrome Identifies a Novel Mutation in the XRCC2 Gene.

Autor: Valka J; Institute of Hematology and Blood Transfusion, Prague, Czechia, jan.valka@uhkt.cz.; Charles University,1st Faculty of Medicine, Prague, Czechia, jan.valka@uhkt.cz., Vesela J; Institute of Hematology and Blood Transfusion, Prague, Czechia., Votavova H; Institute of Hematology and Blood Transfusion, Prague, Czechia., Dostalova-Merkerova M; Institute of Hematology and Blood Transfusion, Prague, Czechia., Urbanova Z; Institute of Hematology and Blood Transfusion, Prague, Czechia.; Charles University,1st Faculty of Medicine, Prague, Czechia., Jonasova A; First Internal Clinic - Clinic of Hematology, General University Hospital, Prague, Czechia., Cermak J; Institute of Hematology and Blood Transfusion, Prague, Czechia., Belickova M; Institute of Hematology and Blood Transfusion, Prague, Czechia.
Jazyk: angličtina
Zdroj: Oncology research and treatment [Oncol Res Treat] 2019; Vol. 42 (5), pp. 263-268. Date of Electronic Publication: 2019 Mar 12.
DOI: 10.1159/000497209
Abstrakt: Background: We aimed to detect single nucleotide polymorphisms (SNPs) and mutations in DNA repair genes and their possible association with myelodysplastic syndrome (MDS).
Methods: Targeted enrichment resequencing of 84 DNA repair genes was initially performed on a screening cohort of MDS patients. Real-time polymerase chain reaction was used for genotyping selected SNPs in the validation cohort of patients.
Results: A heterozygous frameshift mutation in the XRCC2 gene was identified. It leads to the formation of a truncated non-functional protein and decreased XRCC2 expression level. Decreased expression levels of all DNA repair genes functionally connected with mutated XRCC2 were also present. Moreover, a synonymous substitution in the PRKDC gene and 2 missense mutations in the SMUG1 and XRCC1 genes were also found. In the screening cohort, 6 candidate SNPs were associated with the tendency to develop MDS: rs4135113 (TDG, p = 0.03), rs12917 (MGMT, p = 0.003), rs2230641 (CCNH, p = 0.01), rs2228529 and rs2228526 (ERCC6, p = 0.04 and p = 0.03), and rs1799977 (MLH1, p = 0.04). In the validation cohort, only a polymorphism in MLH1 was significantly associated with development of MDS in patients with poor cytogenetics (p = 0.0004).
Conclusion: Our study demonstrates that genetic variants are present in DNA repair genes of MDS patients and may be associated with susceptibility to MDS.
(© 2019 S. Karger AG, Basel.)
Databáze: MEDLINE
Externí odkaz: