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Rare combination in an infant patient: trisomy 7p and tetralogy of Fallot. Cardiol Young 2022; 32:2038-2040. [PMID: 35411843 DOI: 10.1017/s1047951122001044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
This case report presents an infant patient with the association of trisomy 7p and tetralogy of Fallot(ToF). Patients diagnosed with trisomy 7p should certainly be scheduled for an echocardiographic exam and be scanned for any CHD that may accompany it. The CHD that most frequently accompany this syndrome include atrial septal defect, ventricular septal defect, and patent ductus arteriosis. Yet, it should be known that ToF may also be present, albeit rarely.
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Hussein IR, Bader RS, Chaudhary AG, Bassiouni R, Alquaiti M, Ashgan F, Schulten HJ, Al Qahtani MH. Identification of De Novo and Rare Inherited Copy Number Variants in Children with Syndromic Congenital Heart Defects. Pediatr Cardiol 2018. [PMID: 29541814 DOI: 10.1007/s00246-018-1842-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Congenital heart defects (CHDs) are the most common birth defects in neonatal life. CHDs could be presented as isolated defects or associated with developmental delay (DD) and/or other congenital malformations. A small proportion of cardiac defects are caused by chromosomal abnormalities or single gene defects; however, in a large proportion of cases no genetic diagnosis could be achieved by clinical examination and conventional genetic analysis. The development of genome wide array-Comparative Genomic Hybridization technique (array-CGH) allowed for the detection of cryptic chromosomal imbalances and pathogenic copy number variants (CNVs) not detected by conventional techniques. We investigated 94 patients having CHDs associated with other malformations and/or DD. Clinical examination and Echocardiography was done to all patients to evaluate the type of CHD. To investigate for genome defects we applied high-density array-CGH 2 × 400K (41 patients) and CGH/SNP microarray 2 × 400K (Agilent) for 53 patients. Confirmation of results was done using Fluorescent in situ hybridization (FISH) or qPCR techniques in certain cases. Chromosomal abnormalities such as trisomy 18, 13, 21, microdeletions: del22q11.2, del7q11.23, del18 (p11.32; p11.21), tetrasomy 18p, trisomy 9p, del11q24-q25, add 15p, add(18)(q21.3), and der 9, 15 (q34.2; q11.2) were detected in 21/94 patients (22%) using both conventional cytogenetics methods and array-CGH technique. Cryptic chromosomal anomalies and pathogenic variants were detected in 15/73 (20.5%) cases. CNVs were observed in a large proportion of the studied samples (27/56) (48%). Clustering of variants was observed in chromosome 1p36, 1p21.1, 2q37, 3q29, 5p15, 7p22.3, 8p23, 11p15.5, 14q11.2, 15q11.2, 16p13.3, 16p11.2, 18p11, 21q22, and 22q11.2. CGH/SNP array could detect loss of heterozygosity (LOH) in different chromosomal loci in 10/25 patients. Array-CGH technique allowed for detection of cryptic chromosomal imbalances that could not be detected by conventional cytogenetics methods. CHDs associated with DD/congenital malformations presented with a relatively high rate of cryptic chromosomal abnormalities. Clustering of CNVs in certain genome loci needs further analysis to identify candidate genes that may provide clues for understanding the molecular pathway of cardiac development.
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Affiliation(s)
- Ibtessam R Hussein
- Centre of Excellence in Genomic Medicine Research (CEGMR), King Fahd Medical Research Centre, King Abdulaziz University, Jeddah, 21589, Kingdom of Saudi Arabia.
| | - Rima S Bader
- Pediatric Cardiology Department, King Abdulaziz University Hospital, Jeddah, Kingdom of Saudi Arabia
| | - Adeel G Chaudhary
- Centre of Excellence in Genomic Medicine Research (CEGMR), King Fahd Medical Research Centre, King Abdulaziz University, Jeddah, 21589, Kingdom of Saudi Arabia.,Faculty of Medical Sciences, King Abdulaziz University, Jeddah, Kingdom of Saudi Arabia
| | - Randa Bassiouni
- Children Hospital, Ministry of Health, Ta'if, Kingdom of Saudi Arabia
| | - Maha Alquaiti
- Centre of Excellence in Genomic Medicine Research (CEGMR), King Fahd Medical Research Centre, King Abdulaziz University, Jeddah, 21589, Kingdom of Saudi Arabia
| | - Fai Ashgan
- Centre of Excellence in Genomic Medicine Research (CEGMR), King Fahd Medical Research Centre, King Abdulaziz University, Jeddah, 21589, Kingdom of Saudi Arabia
| | - Hans-Juergen Schulten
- Centre of Excellence in Genomic Medicine Research (CEGMR), King Fahd Medical Research Centre, King Abdulaziz University, Jeddah, 21589, Kingdom of Saudi Arabia
| | - Mohammad H Al Qahtani
- Centre of Excellence in Genomic Medicine Research (CEGMR), King Fahd Medical Research Centre, King Abdulaziz University, Jeddah, 21589, Kingdom of Saudi Arabia.,Faculty of Medical Sciences, King Abdulaziz University, Jeddah, Kingdom of Saudi Arabia
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Yu AC, Zambrano RM, Cristian I, Price S, Bernhard B, Zucker M, Venkateswaran S, McGowan-Jordan J, Armour CM. Variable developmental delays and characteristic facial features-A novel 7p22.3p22.2 microdeletion syndrome? Am J Med Genet A 2017; 173:1593-1600. [PMID: 28440577 DOI: 10.1002/ajmg.a.38241] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2016] [Revised: 03/08/2017] [Accepted: 03/11/2017] [Indexed: 12/22/2022]
Abstract
Isolated 7p22.3p22.2 deletions are rarely described with only two reports in the literature. Most other reported cases either involve a much larger region of the 7p arm or have an additional copy number variation. Here, we report five patients with overlapping microdeletions at 7p22.3p22.2. The patients presented with variable developmental delays, exhibiting relative weaknesses in expressive language skills and relative strengths in gross, and fine motor skills. The most consistent facial features seen in these patients included a broad nasal root, a prominent forehead a prominent glabella and arched eyebrows. Additional variable features amongst the patients included microcephaly, metopic ridging or craniosynostosis, cleft palate, cardiac defects, and mild hypotonia. Although the patients' deletions varied in size, there was a 0.47 Mb region of overlap which contained 7 OMIM genes: EIP3B, CHST12, LFNG, BRAT1, TTYH3, AMZ1, and GNA12. We propose that monosomy of this region represents a novel microdeletion syndrome. We recommend that individuals with 7p22.3p22.2 deletions should receive a developmental assessment and a thorough cardiac exam, with consideration of an echocardiogram, as part of their initial evaluation.
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Affiliation(s)
- Andrea C Yu
- Department of Genetics, Children's Hospital of Eastern Ontario, Ottawa, Ontario, Canada
| | - Regina M Zambrano
- Division of Clinical Genetics, Department of Pediatrics, Louisiana State University Health Science Center, New Orleans, Louisiana
| | - Ingrid Cristian
- Division of Genetics and Metabolism, Department of Pediatrics, Nemours Children's Hospital Orlando, Orlando, Florida
| | - Sue Price
- Oxford Regional Genetic Service, Churchill Hospital, Oxford, UK
| | - Birgitta Bernhard
- North West Thames Regional Genetic Service, North West London Hospitals, Greater London, England
| | - Marc Zucker
- Department of Pediatrics, Children's Hospital of Eastern Ontario, Ottawa, Ontario, Canada
| | - Sunita Venkateswaran
- Division of Neurology, Children's Hospital of Eastern Ontario, Ottawa, Ontario, Canada
| | - Jean McGowan-Jordan
- Department of Pathology and Laboratory Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | - Christine M Armour
- Department of Genetics, Children's Hospital of Eastern Ontario, Ottawa, Ontario, Canada.,Children's Hospital of Eastern Ontario Research Institute, Ottawa, Ontario, Canada
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Hussein IR, Magbooli A, Huwait E, Chaudhary A, Bader R, Gari M, Ashgan F, Alquaiti M, Abuzenadah A, AlQahtani M. Genome wide array-CGH and qPCR analysis for the identification of genome defects in Williams' syndrome patients in Saudi Arabia. Mol Cytogenet 2016; 9:65. [PMID: 27525043 PMCID: PMC4981984 DOI: 10.1186/s13039-016-0266-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Accepted: 07/19/2016] [Indexed: 11/27/2022] Open
Abstract
Background Williams-Beuren Syndrome (WBS) is a rare neurodevelopmental disorder characterized by dysmorphic features, cardiovascular defects, cognitive deficits and developmental delay. WBS is caused by a segmental aneuploidy of chromosome 7 due to heterozygous deletion of contiguous genes at the long arm of chromosome 7q11.23. We aimed to apply array-CGH technique for the detection of copy number variants in suspected WBS patients and to determine the size of the deleted segment at chromosome 7q11.23 in correlation with the phenotype. The study included 24 patients referred to the CEGMR with the provisional diagnosis of WBS and 8 parents. The patients were subjected to conventional Cytogenetic (G-banding) analysis, Molecular Cytogenetic (Fluorescent In-Situ Hybridization), array-based Comparative Genomic Hybridization (array-CGH) and quantitative Real time PCR (qPCR) Techniques. Results No deletions were detected by Karyotyping, however, one patient showed unbalanced translocation between chromosome 18 and 19, the karyotype was 45,XX, der(19) t(18;19)(q11.1;p13.3)-18. FISH technique could detect microdeletion in chromosome 7q11.23 in 10/24 patients. Array-CGH and qPCR confirmed the deletion in all samples, and could detect duplication of 7q11.23 in three patients and two parents. Furthermore, the size of the deletion could be detected accurately by both array-CGH and qPCR techniques. Three patients not showing the 7q11.23 deletion were diagnosed by array-CGH to have deletion in chr9p13.1-p11.2, chr18p11.32-p11.21 and chr1p36.13. Conclusion Both FISH and array-CGH are reliable methods for the diagnosis of WBS; however, array-CGH has the advantage of detection of genome deletions/ duplications that cannot otherwise be detected by conventional cytogenetic techniques. Array-CGH and qPCR are useful for detection of deletion sizes and prediction of the interrupted genes and their impact on the disease phenotype. Further investigations are needed for studying the impact of deletion sizes and function of the deleted genes on chromosome 7q11.23. Trial registration ISRCTN ISRCTN73824458. MOCY-D-16-00041R1. Registered 28 September 2014. Retrospectively registered.
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Affiliation(s)
- I R Hussein
- Centre of Excellence in Genomic Medicine Research (CEGMR), King Abdulaziz University, Jeddah, 21589 KSA Saudi Arabia
| | - A Magbooli
- Diagnostic Genomic Medicine Unit (DGMU), King Abdulaziz University, Jeddah, KSA Saudi Arabia
| | - E Huwait
- Faculty of Science, King Abdulaziz University, Jeddah, KSA Saudi Arabia
| | - A Chaudhary
- Centre of Excellence in Genomic Medicine Research (CEGMR), King Abdulaziz University, Jeddah, 21589 KSA Saudi Arabia.,Faculty of Medical Sciences, King Abdulaziz University, Jeddah, KSA Saudi Arabia
| | - R Bader
- Pediatric Cardiology Department, King Abdulaziz University, Jeddah, KSA Saudi Arabia
| | - M Gari
- Centre of Excellence in Genomic Medicine Research (CEGMR), King Abdulaziz University, Jeddah, 21589 KSA Saudi Arabia.,Faculty of Medical Sciences, King Abdulaziz University, Jeddah, KSA Saudi Arabia
| | - F Ashgan
- Centre of Excellence in Genomic Medicine Research (CEGMR), King Abdulaziz University, Jeddah, 21589 KSA Saudi Arabia
| | - M Alquaiti
- Centre of Excellence in Genomic Medicine Research (CEGMR), King Abdulaziz University, Jeddah, 21589 KSA Saudi Arabia
| | - A Abuzenadah
- Centre of Excellence in Genomic Medicine Research (CEGMR), King Abdulaziz University, Jeddah, 21589 KSA Saudi Arabia.,Faculty of Medical Sciences, King Abdulaziz University, Jeddah, KSA Saudi Arabia
| | - M AlQahtani
- Centre of Excellence in Genomic Medicine Research (CEGMR), King Abdulaziz University, Jeddah, 21589 KSA Saudi Arabia.,Diagnostic Genomic Medicine Unit (DGMU), King Abdulaziz University, Jeddah, KSA Saudi Arabia.,Faculty of Medical Sciences, King Abdulaziz University, Jeddah, KSA Saudi Arabia
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Hryshchenko NV, Bychkova GM, Tavokina LV, Brovko AO, Graziano C, Soloviov OO, Hettinger JA, Patsalis PC, Lurie IW, Livshits LA. Unbalanced translocations involving chromosome region 10q25.3q26.3 in patients with intellectual disability and complex phenotypes. Cytogenet Genome Res 2015; 144:169-77. [PMID: 25573336 DOI: 10.1159/000370086] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/16/2014] [Indexed: 11/19/2022] Open
Abstract
We describe 2 Ukrainian families with unbalanced reciprocal translocations (RTs) involving the distal part of chromosome 10q. In both families, the fathers were healthy carriers of the RT. Two affected patients from the first family had an ∼2.3-Mb loss at 10q26.3 and an ∼25-Mb gain at 2q35qter, and the patient from the other family had an ∼12.5-Mb loss at 5p15.2pter and an ∼18-Mb gain at 10q25.3q26.3. We assume that intellectual disability (ID) in association with congenital anomalies observed in our patients was the result of the cumulative effect of both gains and losses of the chromosomal regions involved in each translocation. Comparison of the sizes of the deleted and duplicated segments in our families as well as in other published families with translocations affecting the distal part of 10q showed that generally deletions seem to be ∼2 times more harmful than duplications of the same size. The data obtained here may contribute to improve the diagnosis and genetic counseling of families with similar chromosomal imbalances.
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Affiliation(s)
- Nataliya V Hryshchenko
- Human Genomics Department, Institute of Molecular Biology and Genetics, NASU, Kiev, Ukraine
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Yi Z, Yingjun X, Yongzhen C, Liangying Z, Meijiao S, Baojiang C. Prenatal diagnosis of pure partial monosomy 18p associated with holoprosencephaly and congenital heart defects. Gene 2014; 533:565-9. [DOI: 10.1016/j.gene.2013.09.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Revised: 09/04/2013] [Accepted: 09/06/2013] [Indexed: 01/01/2023]
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