Highly Sensitive and Specific Detection of SRY Gene for Non-invasive Prenatal Diagnosis
10.11895/j.issn.0253-3820.170332
- VernacularTitle:用于无创产前诊断的SRY基因高灵敏高特异检测方法研究
- Author:
Lin Lin LIU
1
;
Lin Meng ZHENG
;
Jie Bing ZOU
;
Xin Qin SONG
;
Hua Guo ZHOU
Author Information
1. 药物质量与安全预警教育部重点实验室
- Keywords:
Real-time polymerase chain reaction;
Invader assay;
Cell-free fetal DNA;
SRY gene;
Non-invasive prenatal diagnosis
- From:
Chinese Journal of Analytical Chemistry
2017;45(10):1448-1454
- CountryChina
- Language:Chinese
-
Abstract:
By detecting SRY gene of cell-free fetal DNA ( cffDNA) in maternal peripheral blood, the sex of fetuses was determined, the risks of sex-linked genetic disorders were assessed and the birth rate of sick fetuses was decreased. A method of real-time polymerase chain reaction ( PCR) coupled with invader assay was established to detect SRY gene. This method possessed the advantages such as high sensitivity, high specificity and non-contaminated with closed tube detection. Under the optimized reaction conditions such as 250 nmol/L detection probes, 7. 5 U FEN1 enzyme, 0. 5 U Taq polymerase and 67℃ of annealing temperature in pre-amplification, the simulated samples as low as 4% ( 4 copies/μL ) were detected and two clinical samples with the gestation age of 9 weeks and 10 weeks were successfully detected. The detection results showed that this method could be used to detect SRY gene of cffDNA in maternal peripheral blood, providing an effective technique for clinical non-invasive prenatal diagnosis based on SRY gene.
