[Development of a new strategy for minimal residual disease monitoring in children with B-precursor acute lymphoblastic leukemia]. / Mise en place d'une stratégie de suivi de la maladie résiduelle chez les enfants atteints de leucémies aiguës lymphoblastiques préB.
Ann Biol Clin (Paris)
; 62(4): 465-70, 2004.
Article
em Fr
| MEDLINE
| ID: mdl-15297244
ABSTRACT
Despite modern regimen of chemotherapy, one-third of children with acute lymphoblastic leukaemia relapse. Recent studies have shown that a high level of minimal residual disease (MRD) at the end of induction is associated with an increased risk of relapse. We have developed and validated a real-time PCR method (RQ-PCR) to quantify MRD. We monitored 57 patients using IgH and TCR (Vdelta2Ddelta3) genes rearrangements as PCR targets. RQ-PCR was performed with a primer and a TaqMan probe designed to consensus sequences in VH segments in combination with one allele specific oligonucleotide primer complementary to the junctionnal region. A sensitivity of 10(-4) was reached for 72% of the IgH alleles (n = 50) and for 54,5% of the Vdelta2Ddelta3 alleles (n = 22). We compared the results with those obtained by competitive PCR in 53 patients no discordance between the two methods was observed. Seventeen patients were found positive (32%) and 27 negative (51%) with both techniques and 9 children (17%) were positive only with TaqMan technology. RQ-PCR is more sensitive and more specific than competitive PCR. We thus propose that RQ-PCR might be used in first intention for MRD analysis.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
DNA de Neoplasias
/
Leucemia-Linfoma Linfoblástico de Células Precursoras B
/
Reação em Cadeia da Polimerase
/
Monitoramento de Medicamentos
/
Assistência ao Convalescente
Tipo de estudo:
Diagnostic_studies
/
Etiology_studies
/
Prognostic_studies
/
Risk_factors_studies
Limite:
Adolescent
/
Child
/
Child, preschool
/
Female
/
Humans
/
Infant
Idioma:
Fr
Revista:
Ann Biol Clin (Paris)
Ano de publicação:
2004
Tipo de documento:
Article