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Yang L, Tao T, Zhao X, Tao H, Su J, Shen Y, Tang Y, Qian F, Xiao J. Association between fetal chromosomal abnormalities and the frequency of spontaneous abortions. Exp Ther Med 2020; 19:2505-2510. [PMID: 32256728 PMCID: PMC7086225 DOI: 10.3892/etm.2020.8524] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2019] [Accepted: 01/06/2020] [Indexed: 02/07/2023] Open
Abstract
Fetal chromosomal abnormalities are a common cause of spontaneous abortion. The present study investigated the association between fetal chromosomal abnormalities and the frequency of spontaneous abortions to enable clinicians to provide more informed genetic counseling. A total of 182 patients with a history of spontaneous abortions were recruited from July 2015 to August 2017. G-banding cytogenetic analysis and novel high-throughput ligation-dependent probe amplification (HLPA) techniques were performed on conception in all 182 patients to detect chromosomal abnormalities. Low-coverage whole-genome sequencing (WGS) was performed in 74 patients to detect copy number variations (CNVs). There were no significant differences in the incidence of karyotype abnormalities between patients with sporadic miscarriages (48.0%; SM group) and patients suffering recurrent spontaneous abortions (44.8%; RSA group). The maternal age was markedly higher in patients with 3 miscarriages. WGS indicated that the incidence of pathogenic CNVs in the RSA group was higher than that in the SM group, but the difference was not significant. In conclusion, a high incidence of karyotype abnormalities and pathogenic CNVs was observed in patients with spontaneous abortion. However, no association between fetal chromosomal abnormalities and the number of spontaneous abortions was observed. HLPA assays may be used as an alternative method for fetal karyotype analysis and determination of CNVs in patients with SM and RSA.
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Affiliation(s)
- Lan Yang
- Department of Prenatal Diagnosis Center, Wuxi Maternal and Child Health Hospital Affiliated to Nanjing Medical University, Wuxi, Jiangsu 214000, P.R. China
| | - Tao Tao
- Genesky Diagnostics Inc., Suzhou, Jiangsu 215000, P.R. China
| | - Xin Zhao
- Department of Prenatal Diagnosis Center, Wuxi Maternal and Child Health Hospital Affiliated to Nanjing Medical University, Wuxi, Jiangsu 214000, P.R. China
| | - Hehua Tao
- Department of Prenatal Diagnosis Center, Wuxi Maternal and Child Health Hospital Affiliated to Nanjing Medical University, Wuxi, Jiangsu 214000, P.R. China
| | - Jingna Su
- Department of Prenatal Diagnosis Center, Wuxi Maternal and Child Health Hospital Affiliated to Nanjing Medical University, Wuxi, Jiangsu 214000, P.R. China
| | - Ye Shen
- Department of Family Planning, Wuxi Maternal and Child Health Hospital Affiliated Nanjing Medical University, Wuxi, Jiangsu 214000, P.R. China
| | - Ye Tang
- Department of Prenatal Diagnosis Center, Wuxi Maternal and Child Health Hospital Affiliated to Nanjing Medical University, Wuxi, Jiangsu 214000, P.R. China
| | - Fangbo Qian
- Department of Family Planning, Wuxi Maternal and Child Health Hospital Affiliated Nanjing Medical University, Wuxi, Jiangsu 214000, P.R. China
| | - Jianping Xiao
- Department of Prenatal Diagnosis Center, Wuxi Maternal and Child Health Hospital Affiliated to Nanjing Medical University, Wuxi, Jiangsu 214000, P.R. China
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Kobrynski LJ, Yazdanpanah GK, Koontz D, Lee FK, Vogt RF. MALDI-TOF-MS Assay to Detect the Hemizygous 22q11.2 Deletion in DNA from Dried Blood Spots. Clin Chem 2015; 62:287-92. [PMID: 26585925 DOI: 10.1373/clinchem.2015.247148] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Accepted: 10/26/2015] [Indexed: 12/24/2022]
Abstract
BACKGROUND A hemizygous deletion of 1.5-3 Mb in 22q11.2 causes a distinct clinical syndrome with variable congenital defects. Current diagnostic methods use fluorescent in situ hybridization (FISH) or comparative genomic hybridization by microarray to detect the deletion. Neither method is suitable for newborn screening (NBS), since they cannot be performed on dried blood spots (DBS). We developed a MALDI-TOF-MS assay that uses DBS to measure the hemizygous deletion of UFD1L, located within the 22q11.2 region. METHODS We used DBS from 54 affected patients, previously tested by FISH or microarray, and 100 cord blood samples to evaluate the performance of the MALDI-TOF-MS assay. With a single primer pair, a 97-base oligonucleotide within UFD1L was amplified, as was a sequence on chromosome 18 that differs by 2 nucleotides. A multiplexed, single-base extension reaction created allele-specific products for MALDI-TOF-MS detection. The products were spotted onto a silicon chip, and the height of the spectral peaks identified the relative amounts of target and reference gene. RESULTS The median ratio of the spectral peak for each UFD1L target:reference base was 0.96 and 0.99 for controls, compared with 0.35 and 0.53 for 22q11 deletion syndrome patients. There was 100% concordance between FISH/microarray and MALDI-TOF-MS in all patients with 22q11.2 deletion syndrome. CONCLUSIONS This method can be reliably performed with DBS and is suitable for high sample throughput. This assay may be considered for use in population-based NBS for 22q11.2 deletion.
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Affiliation(s)
- Lisa J Kobrynski
- Department of Pediatrics, Allergy and Immunology Section, Emory University School of Medicine, Atlanta, GA;
| | - Golriz K Yazdanpanah
- Newborn Screening Translational Research Initiative, CDC Foundation, Atlanta, GA
| | - Deborah Koontz
- Newborn Screening and Molecular Biology Branch, Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA
| | - Francis K Lee
- Newborn Screening and Molecular Biology Branch, Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA
| | - Robert F Vogt
- Newborn Screening and Molecular Biology Branch, Division of Laboratory Sciences, National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta, GA
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Zhang W, Shen L, Deng Z, Ding Y, Mo X, Xu Z, Gao Q, Yi L. Novel missense variants of ZFPM2/FOG2 identified in conotruncal heart defect patients do not impair interaction with GATA4. PLoS One 2014; 9:e102379. [PMID: 25025186 PMCID: PMC4099368 DOI: 10.1371/journal.pone.0102379] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2014] [Accepted: 06/16/2014] [Indexed: 11/19/2022] Open
Abstract
Conotruncal heart defect (CTD) is a complex form of congenital heart disease and usually has a poor prognosis. ZFPM2/FOG2 encodes a transcription cofactor that interacts with GATA4 to regulate cardiac development. This regulation has been established in knockout mouse models that display a range of heart malformations, especially CTD. Although previous studies have identified several missense variants in ZFPM2/FOG2 that may cause CTD, it remains unclear whether they are involved in CTD pathogenesis because the study populations were limited and the functional status was unknown. In this report, we screened a larger CTD population, which comprised 145 tetralogy of Fallot (TOF), 37 double-outlet ventricle outflow (DORV), and 18 transposition of the great artery (TGA), to investigate exon mutations as well as copy number variations in ZFPM2/FOG2. Four variants (p.V339I in one DORV, p.A426T in one DORV, p.M703L in three TOF, p.T843M in one TOF) were found in six patients, of which two are reported here for the first time. No copy number variations of the gene were detected. GST pull-down assays demonstrated that all potentially deleterious variants, including those previously reported, did not impair the interaction with GATA4, except for variant p.M544I and p.K737E, which subtly impaired the binding. Thus, these missense variants may be involved in other mechanisms underlying CTD or may be unrelated to CTD occurrence.
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Affiliation(s)
- Wenwen Zhang
- Center for Translational Medicine, Nanjing University Medical School, Nanjing, Jiangsu, PR China
- Jiangsu Key Laboratory for Molecular Medicine, Nanjing University Medical School, Nanjing, PR China
| | - Li Shen
- Department of Cardiothoracic Surgery, Shanghai Children's Hospital, Shanghai Jiaotong University, Shanghai, PR China
| | - Zhantao Deng
- Center for Translational Medicine, Nanjing University Medical School, Nanjing, Jiangsu, PR China
- Jiangsu Key Laboratory for Molecular Medicine, Nanjing University Medical School, Nanjing, PR China
| | - Yibing Ding
- Center for Translational Medicine, Nanjing University Medical School, Nanjing, Jiangsu, PR China
- Jiangsu Key Laboratory for Molecular Medicine, Nanjing University Medical School, Nanjing, PR China
| | - Xuming Mo
- Department of Cardiothoracic Surgery, Nanjing Children's Hospital, Nanjing, PR China
| | - Zhengfeng Xu
- Center of Prenatal Diagnosis, Nanjing Maternity and Child Health Hospital, Nanjing Medical School, Nanjing, Jiangsu, PR China
| | - Qian Gao
- Center for Translational Medicine, Nanjing University Medical School, Nanjing, Jiangsu, PR China
- Jiangsu Key Laboratory for Molecular Medicine, Nanjing University Medical School, Nanjing, PR China
- * E-mail: (QG); (LY)
| | - Long Yi
- Center for Translational Medicine, Nanjing University Medical School, Nanjing, Jiangsu, PR China
- Jiangsu Key Laboratory for Molecular Medicine, Nanjing University Medical School, Nanjing, PR China
- * E-mail: (QG); (LY)
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Hu P, Wang Y, Meng LL, Qin L, Ma DY, Yi L, Xu ZF. 1q25.2-q31.3 Deletion in a female with mental retardation, clinodactyly, minor facial anomalies but no growth retardation. Mol Cytogenet 2013; 6:30. [PMID: 23915434 PMCID: PMC3766032 DOI: 10.1186/1755-8166-6-30] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2013] [Accepted: 06/17/2013] [Indexed: 11/10/2022] Open
Abstract
The reports of 1q25-32 deletion cases are rare. We reported here an 11-year-old Chinese Han female with an interstitial 1q25 deletion displaying mental retardation, clinodactyly of the 5th finger and minor facial anomalies. Notably, the patient did not present growth retardation which is quite common in patients with 1q25-32 deletion encompassing LHX4. The heterozygous deletion in this patient was characterized as 46,XX,del(1)(q25.2-q31.3) with a length of 20.5 Mb according to SNP-array test results. STRP (Short Tandem Repeat Polymorphism) analysis of the family trio indicated the genomic abnormality was de novo with paternal origin. After a genotype-phenotype analysis, we proposed here the loss of a 3.1 Mb critical region including 24 genes within 1q25.2 (chr1:174.5-177.6 Mb, build 36) may account for the mental retardation in patients with 1q25-32 deletion.
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Affiliation(s)
- Ping Hu
- State key Laboratory of Reproductive Medicine, Department of Prenatal Diagnosis, Nanjing Maternity and Child Health Care Hospital Affiliated to Nanjing Medical University, 123 Tianfei Street, Nanjing 210029, China
| | - Yan Wang
- State key Laboratory of Reproductive Medicine, Department of Prenatal Diagnosis, Nanjing Maternity and Child Health Care Hospital Affiliated to Nanjing Medical University, 123 Tianfei Street, Nanjing 210029, China
| | - Lu-Lu Meng
- State key Laboratory of Reproductive Medicine, Department of Prenatal Diagnosis, Nanjing Maternity and Child Health Care Hospital Affiliated to Nanjing Medical University, 123 Tianfei Street, Nanjing 210029, China
| | - Ling Qin
- State key Laboratory of Reproductive Medicine, Department of Prenatal Diagnosis, Nanjing Maternity and Child Health Care Hospital Affiliated to Nanjing Medical University, 123 Tianfei Street, Nanjing 210029, China
| | - Ding-Yuan Ma
- State key Laboratory of Reproductive Medicine, Department of Prenatal Diagnosis, Nanjing Maternity and Child Health Care Hospital Affiliated to Nanjing Medical University, 123 Tianfei Street, Nanjing 210029, China
| | - Long Yi
- Department of Pathology, Nanjing University Medical School, Nanjing 210093, PR China
| | - Zheng-Feng Xu
- State key Laboratory of Reproductive Medicine, Department of Prenatal Diagnosis, Nanjing Maternity and Child Health Care Hospital Affiliated to Nanjing Medical University, 123 Tianfei Street, Nanjing 210029, China
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Influence of chromosome 22q11.2 microdeletion on postoperative calcium level after cardiac-correction surgery. Pediatr Cardiol 2011; 32:904-9. [PMID: 21678063 DOI: 10.1007/s00246-011-0012-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2010] [Accepted: 05/28/2011] [Indexed: 10/18/2022]
Abstract
One of the most common constitutional chromosomal abnormalities, 22q11.2 microdeletion (del22q11.2) syndrome has diverse medical complications, such as congenital heart defect, hypocalcaemia, and immune deficiency, which require coordinated multidisciplinary care. Until now, the natural history of hypocalcaemia in chromosome del22q11.2 syndrome had been only partly documented, but there has been limited recognition of the importance of calcium status during the postoperative period when altered calcium status may be associated with serious complications. The goals of our study were (1) to delineate the clinical characteristics of serum calcium in patients with del22q11.2 during the postoperative period and (2) to make recommendations for the investigation and management of del22q11.2 patients after cardiac correction. This study included 22 children diagnosed with del22q11.2 syndrome and 110 children without del22q11.2 syndrome from Nanjing Children's Hospital. Clinical examinations and blood ionized calcium testing were reviewed retrospectively. A comparative study of postoperative calcium levels and complications of del22q11.2 patients with nondeletion patients was performed. Association between postoperative hypocalcaemia and adverse incidents after cardiac correction was also examined. Postoperative hypocalcaemia was observed among 86.4% of del22q11.2 patients and among only 47.3% of nondeletion subjects. The difference was statistically significant (P = 0.0017). Patients with del22q11.2 syndrome also had a much sharper decrease in serum calcium levels during the first 6 h after surgery than nondeletion patients. Postoperative clinical analysis showed that del22q11.2 patients with hypocalcaemia experience more postoperative complications (18 of 19) and greater mortality (5 of 19) after cardiac correction than del22q11.2 patients without normal calcium levels and nondeletion patients. Del22q11.2 children have high susceptibility of hypocalcaemia during the postoperative period, and this low calcium status after cardiac correction may be associated with significant risk of postoperative complications and mortality in patients with del22q11.2.
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22q11.2 microduplication in a family with recurrent fetal congenital heart disease. Eur J Med Genet 2011; 54:e433-6. [PMID: 21473936 DOI: 10.1016/j.ejmg.2011.03.009] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2010] [Accepted: 03/20/2011] [Indexed: 11/21/2022]
Abstract
People carrying a 22q11.2 microduplication display a phenotype varying from normal to severely affected. We report a phenotypically normal female presented with a fetus having a severe congenital heart defect with ventricular septal defect, tricuspid atresia, patent ductus arteriosus and interrupted aortic arch. The pregnant woman had a history of overall three consecutive aberrant pregnancies with tetralogy of Fallot. Standard G-banding karyotype analysis of the parents and the actual pregnancy were normal, while array comparative genomic hybridization (arrayCGH) analysis revealed a 22q11.2 microduplication within the fetus' genome. Fluorescence in situ hybridization (FISH) and short tandem repeat polymorphism (STRP) tests indicated the affected fetus inherited the interstitial 22q11.2 microduplication from the mother. High-resolution oligonucleotide microarray analysis showed this microduplication is located in the common 3 Mb 22q11.2 deletion region between positions 17.298 Mb and 20.246 Mb with a length of 2.948 Mb. This report demonstrates the remarkable intrafamilial variability of a 22q11.2 microduplication phenotype. The 22q11.2 microduplication carried by one of the healthy parents has most likely contributed to the recurrent fetal heart defects.
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Yang C, Zhu X, Yi L, Shi Z, Wang H, Hu Y, Wang Y. Comparative study of three PCR-based copy number variant approaches, CFMSA, M-PCR, and MLPA, in 22q11.2 deletion syndrome. Genet Test Mol Biomarkers 2010; 13:803-8. [PMID: 20001582 DOI: 10.1089/gtmb.2009.0058] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Small submicroscopic DNA copy number variants represent an important source of variation in the human genome, human phenotypic diversity, and disease susceptibility. Consequently, there is a pressing need for the development of methods allowing the efficient, accurate, and cheap measurement of genomic copy number polymorphisms in clinical cohorts. The PCR-based strategies, being cost-effective and sensitive, are considered important in the development of screening techniques. PCR-based techniques such as multiplex PCR; multiplex ligation-dependent probe amplification; and a new single-tube assay technique, the competitive fluorescent multiplex STRP assay, have been applied to 22q11.2 detection, a typical example of deletion syndromes. In this study, we compared the reliability and application of these three techniques in a cohort of 17 patients affected with 22q11.2 deletion and 300 normal controls. All three techniques shared 100% sensitivity; however, the competitive fluorescent multiplex STRP assay had the lowest possibility of concurrent false-positive signals from two adjoining probes in a genomic region. Moreover, it is a relatively fast and low-cost procedure to detect the deletion of 22q11.2 in numerous patients with several minor symptoms of deletion syndromes. Multiplex PCR, a rapidly developing and cheap technique, allows detection of atypical deletions.
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Affiliation(s)
- Chi Yang
- Department of Medical Genetics, Nanjing University School of Medicine, Nanjing, China
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