Whole genome sequencing based noninvasive prenatal test
Journal of Genetic Medicine
;
: 61-65, 2015.
Artigo
em Inglês
| WPRIM
| ID: wpr-195770
ABSTRACT
Whole genome sequencing (WGS)-based noninvasive prenatal test (NIPT) is the first method applied in the clinical setting out of various NIPT techniques. Several companies, such as Sequenom, BGI, and Illumina offer WGS-based NIPT, each with different technical and bioinformatic approaches. Sequenom, BGI, and Illumina utilize z-, t-, and L-scores, as well as normalized chromosome values, respectively, for trisomy detection. Their outstanding performance has been demonstrated in clinical studies of more than 100,000 pregnancies. The sensitivity and specificity for detection of trisomies 13, 18, and 21 were above 98%, as reported by all three companies. Unlike other techniques, WGS-based NIPT can detect other trisomies as well as clinically significant segmental duplications/deletions within a chromosome, which could expand the scope of NIPT. Incorrect results could be due to low fetal fraction, fetoplacental mosaicism, confined placental mosaicism or maternal copy number variation (CNV). Among those, maternal CNV is a significant contributor of false positive results and therefore genome wide scanning plays an important role in preventing the occurrence of false positives. In this article, the bioinformatic techniques and clinical performance of three major companies are comprehensively reviewed.
Texto completo:
DisponíveL
Índice:
WPRIM (Pacífico Ocidental)
Assunto principal:
Trissomia
/
Sensibilidade e Especificidade
/
Genoma
/
Síndrome de Down
/
Mosaicismo
Tipo de estudo:
Estudo diagnóstico
Limite:
Gravidez
Idioma:
Inglês
Revista:
Journal of Genetic Medicine
Ano de publicação:
2015
Tipo de documento:
Artigo
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