Further improvement in quantifying male fetal DNA in maternal plasma.
Clin Chem
; 58(2): 465-8, 2012 Feb.
Article
em En
| MEDLINE
| ID: mdl-22100805
ABSTRACT
BACKGROUND:
Cell-free fetal DNA (cffDNA) in maternal plasma can be clinically useful for detecting prenatal disorders and pregnancy monitoring. More sensitive, specific, and quantitative detection of cffDNA in maternal plasma may expand the clinical utility of such measurements.METHODS:
We developed a quantitative real-time PCR (qPCR) assay [Y chromosome repetitive sequence (YRS) assay] based on a highly repetitive short sequence specific for the Y chromosome. Both standard qPCR and digital qPCR were performed to compare the sensitivity and specificity of this new assay against already established male DNA-specific assays.RESULTS:
The YRS assay was at least 10-fold more sensitive than the currently most sensitive DYS14 assay. The YRS assay was able to detect 0.5 genome equivalents (GE) per PCR reaction when fetal DNA was present at 0.2% of the total DNA. The background noise for the YRS assay was much lower than for the DYS14 assay in analyses of plasma samples from pregnancies with female fetuses.CONCLUSIONS:
The YRS assay is a substantial improvement for quantifying rare male fetal DNA in maternal plasma. The higher sensitivity and specificity may expand the clinical and research utility of cffDNA.
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
DNA
/
Gravidez
/
Feto
Tipo de estudo:
Diagnostic_studies
Limite:
Female
/
Humans
/
Male
Idioma:
En
Revista:
Clin Chem
Assunto da revista:
QUIMICA CLINICA
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
Singapura