The detection of mosaicism by prenatal BoBs™.
Prenat Diagn
; 33(1): 42-9, 2013 Jan.
Article
em En
| MEDLINE
| ID: mdl-23168997
ABSTRACT
OBJECTIVE:
The objective of the study was to evaluate the ability of a new prenatal diagnostic platform - prenatal BACs-on-Beads™ (BoBs™) in detecting mosaicism by comparison to quantitative fluorescence-polymerase chain reaction (QF-PCR).METHODS:
A validation study of prenatal BoBs™ was firstly performed using 18 artificially constructing mosaic samples involving various aneuploidies and microdeletion conditions. Additionally, we compared the accuracy between prenatal BoBs™ and QF-PCR for 18 archived clinical mosaic cases and nine chromosomally abnormal cell lines with reference to conventional karyotype results.RESULTS:
In the validation study, BoBs™ allowed the detection of mosaicism at a level of 20-40%. Among the clinical mosaic cases, 14/18 cases were within the detection of BoBs™, 8/14 (57.1%) could be identified by BoBs™ and 6/9 (66.7%) by QF-PCR, but 6/14 (42.9%) were missed by both tests. Three cases (16.7%) were detected by prenatal BoBs™ but missed by QF-PCR, whereas QF-PCR detected one case that was missed by BoBs™. The overall sensitivity of BoBs™ in detecting mosaicism is 44.4% (8/18), which is slightly higher than that of QF-PCR (33.3%; 6/18).CONCLUSION:
Prenatal BoBs™ has a sensitivity of 57.1% in the detection clinical mosaic cases. According to the validation test, mosaicism of 20% or greater is detectable by the BoBs™ assay.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Diagnóstico Pré-Natal
/
Transtornos Cromossômicos
Tipo de estudo:
Diagnostic_studies
/
Observational_studies
/
Prognostic_studies
Limite:
Female
/
Humans
/
Pregnancy
Idioma:
En
Ano de publicação:
2013
Tipo de documento:
Article