Comparison between single nucleotide polymorphism array and karyoty-ping in prenatal diagnosis in Down’ s screening abnormal pregnancy / 中国病理生理杂志
Chinese Journal of Pathophysiology
;
(12): 707-712, 2015.
Article
in Chinese
| WPRIM
| ID: wpr-465356
ABSTRACT
[ ABSTRACT] AIM:
To evaluate the clinical application of single nucleotide polymorphism array ( SNP array) in prenatal diagnosis for screening the abnormality of women with Down’ s syndrome ( DS) .METHODS:
The amniotic fluid samples ( n=312) collected by amniocentesis for the DS screening abnormality women were tested by karyotyping and SNP array analysis, respectively.The findings of karyotyping and SNP array analysis were compared.RESULTS:
Two cases of trisomy 21 were identified by karyotyping and SNP array analysis, but SNP array analysis failed to identify 6 cases of chro-mosome balanced structural rearrangement.SNP detected 176 cases copy number variants ( CNVs) in 303 cases normal karyotype were detected by SNP, including 106 benign CNVs, 61 variants of unknown significance (VOUS), 9 de novo CNVs, and none of them was pathogenic.The distribution difference of CNVs in DS screening positive group and DS screening positive plus advanced maternal age group was not statistically significant ( P>0.05) .Furthermore, we reported 14 kinds of CNVs for the first time in population.CONCLUSION:
SNP array can further assure chromosome microdupli-cation/microdeletion.In normal karyotype fetus of prenatal diagnosis, SNP can detect some clinical significant CNVs.
Full text:
Available
Index:
WPRIM (Western Pacific)
Type of study:
Diagnostic study
/
Prognostic study
/
Screening study
Language:
Chinese
Journal:
Chinese Journal of Pathophysiology
Year:
2015
Type:
Article
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