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Tao H, Shi J, Wang J, Zhao L, Ding J, Yang L. Rapid prenatal aneuploidy detection of BACs-on-Beads assay in 4961 cases of amniotic fluid samples. J Matern Fetal Neonatal Med 2019; 34:4090-4096. [PMID: 31875738 DOI: 10.1080/14767058.2019.1704248] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
Objective: To evaluate the diagnostic value of the BACs-on-Beads (BoBs) assay for the rapid diagnosis of common aneuploidies and microdeletions.Methods: A total of 4961 pregnant women admitted to the Wuxi Maternity and Child Health Care Hospital Affiliated to Nanjing Medical University from January 2017 to March 2019 were enrolled. BoBs assay and conventional karyotyping were applied to detect amniotic fluid samples with various indications for prenatal diagnosis. Chromosomal microarray analysis (CMA) and maternal cell contamination (MCC) tests were used for further validation.Results: The overall abnormality detection rates (BoBs associated with karyotyping) were 4.25% (211/4961). The prenatal diagnosis success rate of karyotyping was 99.4% (4933/4961), compared to 100% (4961/4961) using the BoBs assays. The BoBs assay was similar to karyotyping for the detection of trisomy 21 (1.01%, 50/4961), trisomy 18 (0.40%, 20/4961), trisomy 13 (0.04%, 2/4961), and sex chromosomal aneuploidies (0.15%, 12/4961). The BoBs assay also identified sex chromosomal microduplications/microdeletions (1.73%, 86/4961), 22q11.2 microdeletions/microduplications (0.1%, 5/4961), and Cri du Chat syndrome (0.02%, 1/4961) which were missed by karyotyping. The sensitivity for the detection of numerical chromosomal abnormalities of the BoBs assay and karyotyping analysis was 100% (95/95, 95% CI: 1.0-1.0) and 98.9% (94/95, 95% CI: 0.969-1.010), respectively. The sensitivity of detecting structural chromosomal abnormalities in the BoBs assay was significantly higher than those of karyotyping (79.3%, 92/116, 95% CI: 0.718-0.868) versus 21.6% (25/116, 95% CI: 0.140-0.291) (p < .01).Conclusions: The BoBs assay is a reliable and rapid test for the detection of common aneuploidies and nine microdeletion syndromes with high sensitivity and accuracy in prenatal diagnosis. The assay can compensate for the limitations of karyotyping analysis.
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Affiliation(s)
- Hehua Tao
- Department of Prenatal Diagnosis, Wuxi Maternity and Child Health Hospital Affiliated to Nanjing Medical University, Wuxi, China
| | - Jinping Shi
- Department of Prenatal Diagnosis, Wuxi Maternity and Child Health Hospital Affiliated to Nanjing Medical University, Wuxi, China
| | - Junfeng Wang
- Department of Prenatal Diagnosis, Wuxi Maternity and Child Health Hospital Affiliated to Nanjing Medical University, Wuxi, China
| | - Li Zhao
- Department of Prenatal Diagnosis, Wuxi Maternity and Child Health Hospital Affiliated to Nanjing Medical University, Wuxi, China
| | - Jieying Ding
- Department of Prenatal Diagnosis, Wuxi Maternity and Child Health Hospital Affiliated to Nanjing Medical University, Wuxi, China
| | - Lan Yang
- Department of Prenatal Diagnosis, Wuxi Maternity and Child Health Hospital Affiliated to Nanjing Medical University, Wuxi, China
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Xu Y, Li Y, Song T, Guo F, Zheng J, Xu H, Yan F, Cheng L, Li C, Chen B, Zhang J. A retrospective analysis of 237 Chinese families with Duchenne muscular dystrophy history and strategies of prenatal diagnosis. J Clin Lab Anal 2018; 32:e22445. [PMID: 29604111 DOI: 10.1002/jcla.22445] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2017] [Accepted: 03/08/2018] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND To offer 4-year clinical prenatal diagnosis experience of Duchenne muscular dystrophy (DMD). METHODS Denaturing high-performance liquid chromatography (DHPLC) and Sanger sequencing were used for molecular diagnosis of 237 DMD families. RESULTS In the study, deletions, duplications, complex rearrangement and small mutations accounted for 47.3%, 8.4%, 1.7% and 42.6% of 237 families, respectively. Sixty-six different deletion patterns were identified in 112 families. Fourteen different duplication patterns were identified in 20 families and 4 complex rearrangements were identified. About 87.1% different small mutation patterns were identified, including 37.6% different nonsense mutation patterns, 24.8% different frameshift mutation patterns, 7.9% different missense mutation patterns, and 16.8% different splice site mutation patterns. There was no significant difference in the age of onset and mutation patterns (P > .05). The follow-up examinations revealed that the pregnancies of 14 cases were interrupted. Two cases were preterm births, 151 cases were delivered at term, 63 cases continued to pregnancy, and 7 cases were lost to follow-up. CONCLUSION DHPLC and Sanger sequencing technique are efficient, sensitive, and specific in screening for DMD gene mutations. And pre-pregnancy DMD gene examination is an important step to assess mutation type of family with suspected DMD and guides exactly prenatal diagnosis in high-risk families.
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Affiliation(s)
- Ying Xu
- Department of Obstetrics and Gynecology, Xijing Hospital, Fourth Military Medical University, Xi'an, China.,The State Key Laboratory of Cancer Biology, Department of Biopharmaceutics, School of Pharmacy, The Fourth Military Medical University, Xi'an, China
| | - Yu Li
- Department of Obstetrics and Gynecology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Tingting Song
- Department of Obstetrics and Gynecology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Fenfen Guo
- Department of Obstetrics and Gynecology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Jiao Zheng
- Department of Obstetrics and Gynecology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Hui Xu
- Department of Obstetrics and Gynecology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Feng Yan
- Department of Obstetrics and Gynecology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Lu Cheng
- Department of Obstetrics and Gynecology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Chunyan Li
- Department of Obstetrics and Gynecology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Biliang Chen
- Department of Obstetrics and Gynecology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
| | - Jianfang Zhang
- Department of Obstetrics and Gynecology, Xijing Hospital, Fourth Military Medical University, Xi'an, China
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