Abstract:
:Aberrant promoter methylation of RASSF6 and RASSF10 occurs at a high frequency in acute lymphoblastic leukemia (ALL). Because of the complexity of the current minimal residual disease (MRD) detecting-methods, the DNA methylation status of the RASSF6 and RASSF10 genes could potentially become biomarkers for the assessment of MRD levels in ALL patients. The promoter methylation status of RASSF6 and RASSF10 was assessed by using methylation-specific PCR (MSP) in the DNA isolated from 280 peripheral blood (PB) samples taken at the time of diagnosis, day 14, 28, and from the subsequent 30-month follow-ups of 45 adult ALL patients. The relative methylation level obtained during the follow-ups by MSP was compared to the MRD results obtained by the amplification of IG/TCR clonal rearrangements using the allele-specific quantitative-PCR (ASO-PCR) assay. Frequently, RASSF6 was methylated in B-ALL, and RASSF10 was methylated in T-ALL. The applicability and accuracy of the assays were increased when these markers were combined (91.1% and 93.8%, respectively). When a cutoff was defined for the PCR-MRD level, results of the 30 months of MRD detection showed a significant correlation between the PCR and MSP techniques (r = 0.848; p < 0.001). Due to the high applicability, the non-invasiveness, and promising prospect of longitudinal assessment, the DNA methylation status of the RASSF6 and RASSF10 genes could be potential biomarkers for the assessment of residual disease in PB of patients with ALL.
journal_name
Ann Hematoljournal_title
Annals of hematologyauthors
Younesian S,Shahkarami S,Ghaffari P,Alizadeh S,Mehrasa R,Ghaffari SHdoi
10.1007/s00277-019-03775-ysubject
Has Abstractpub_date
2019-12-01 00:00:00pages
2719-2727issue
12eissn
0939-5555issn
1432-0584pii
10.1007/s00277-019-03775-yjournal_volume
98pub_type
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