Abstract:
:Minimal residual disease (MRD) is derived from tumor-initiating cells (TICs) and is responsible for tumor relapse. Neuroblastoma is characterized by extreme tumor heterogeneity, and more than half of high-risk patients experience tumor relapse. To overcome tumor heterogeneity and achieve more sensitive detection of MRD, several sets of real-time RT-PCR markers have been reported for MRD monitoring in neuroblastoma patients from different centers. However, these markers vary across centers and are still being validated. In the present study, we validated the ability of 14 commonly used real-time RT-PCR markers to detect MRD based on their expression in neuroblastoma TICs, and we developed a novel MRD detection protocol, which scored the samples as MRD-positive when the expression of one of the 11 real-time RT-PCR markers (CHRNA3, CRMP1, DBH, DCX, DDC, GABRB3, GAP43, ISL1, KIF1A, PHOX2B and TH) exceeded the normal range. By using this protocol, we prospectively monitored MRD in 73 bone marrow (BM), 12 peripheral blood stem cell and 8 peripheral blood samples from 14 neuroblastoma patients treated at a single center. We scored 100, 56, 56 and 57% BM cytology-positive, elevated vanillylmandelic acid (VMA), elevated homovanillic acid (HVA) and elevated neuron-specific enolase (NSE) samples as MRD-positive, respectively. MRD was also positive in 48, 45, 46 and 43% of the BM cytology-negative and normal VMA, normal HVA and normal NSE samples, respectively. These results suggest that the present MRD detection protocol based on the expression of a set of 11 real-time RT-PCR markers in neuroblastoma TICs achieves sensitive MRD monitoring in neuroblastoma patients.
journal_name
Oncol Repjournal_title
Oncology reportsauthors
Hartomo TB,Kozaki A,Hasegawa D,Van Huyen Pham T,Yamamoto N,Saitoh A,Ishida T,Kawasaki K,Kosaka Y,Ohashi H,Yamamoto T,Morikawa S,Hirase S,Kubokawa I,Mori T,Yanai T,Hayakawa A,Takeshima Y,Iijima K,Matsuo M,Nishio Hdoi
10.3892/or.2013.2286subject
Has Abstractpub_date
2013-04-01 00:00:00pages
1629-36issue
4eissn
1021-335Xissn
1791-2431journal_volume
29pub_type
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