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Mergener R, Nunes MR, Böttcher AK, Siqueira MB, Peruzzo HF, Merola MC, Riegel M, Zen PRG. invdup(8)(8q24.13q24.3)-A Complex Alteration and Its Clinical Consequences. Genes (Basel) 2024; 15:910. [PMID: 39062689 PMCID: PMC11276216 DOI: 10.3390/genes15070910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2024] [Revised: 06/12/2024] [Accepted: 07/10/2024] [Indexed: 07/28/2024] Open
Abstract
Structural variation is a source of genetic variation that, in some cases, may trigger pathogenicity. Here, we describe two cases, a mother and son, with the same partial inverted duplication of the long arm of chromosome 8 [invdup(8)(q24.21q24.21)] of 17.18 Mb, showing different clinical manifestations: microcephaly, dorsal hypertrichosis, seizures and neuropsychomotor development delay in the child, and a cleft lip/palate, down-slanted palpebral fissures and learning disabilities in the mother. The deleterious outcome, in general, is reflected by the gain or loss of genetic material. However, discrepancies among the clinical manifestations raise some concerns about the genomic configuration within the chromosome and other genetic modifiers. With that in mind, we also performed a literature review of research published in the last 20 years about the duplication of the same, or close, chromosome region, seeking the elucidation of at least some relevant clinical features.
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Affiliation(s)
- Rafaella Mergener
- Post-Graduate Program in Pathology, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre 90050-170, RS, Brazil
| | - Marcela Rodrigues Nunes
- Post-Graduate Program in Pathology, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre 90050-170, RS, Brazil
- Medical Genetics Resident, Irmandade da Santa Casa de Misericórdia de Porto Alegre (ISCMPA), Porto Alegre 90020-090, RS, Brazil
| | - Ana Kalise Böttcher
- Undergraduate Program in Biomedical Science, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre 90050-170, RS, Brazil
| | - Monique Banik Siqueira
- Undergraduate Program in Biomedical Sciences, Universidade do Vale do Rio dos Sinos (UNISINOS), São Leopoldo 93022-750, RS, Brazil;
| | - Helena Froener Peruzzo
- Undergraduate Program in Biomedical Science, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre 90050-170, RS, Brazil
| | - Milene Carvalho Merola
- Undergraduate Program in Biomedical Science, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre 90050-170, RS, Brazil
| | - Mariluce Riegel
- Casa dos Raros, Center for Comprehensive Care and Training in Rare Diseases, Porto Alegre 90610-261, RS, Brazil
- National Institute of Population Medical Genetics (INAGEMP), Porto Alegre 90035-903, RS, Brazil
| | - Paulo Ricardo Gazzola Zen
- Post-Graduate Program in Pathology, Universidade Federal de Ciências da Saúde de Porto Alegre (UFCSPA), Porto Alegre 90050-170, RS, Brazil
- Medical Genetics, Department of Clinical Medicine, Universidade Federal de Ciências da Saúde de Porto Alegre(UFCSPA), Porto Alegre 90020-090, RS, Brazil
- Irmandade da Santa Casa de Misericórdia de Porto Alegre (ISCMPA), Porto Alegre 90050-170, RS, Brazil
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Yue F, Sun M, Zhang H, Jiang Y, Li L, He J, Liu R. Molecular cytogenetic characterization of 1q42.3q44 deletion and 8q24.3 duplication in a fetus with single umbilical artery and ventricular septal defects. Taiwan J Obstet Gynecol 2021; 60:1126-1133. [PMID: 34794751 DOI: 10.1016/j.tjog.2021.09.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/27/2021] [Indexed: 10/19/2022] Open
Abstract
OBJECTIVE We present prenatal diagnosis and molecular cytogenetic characterization of a chromosome 1q42.3q44 deletion and 8q24.3 duplication in a fetus with single umbilical artery and ventricular septal defects, and we discuss the genotype-phenotype correlation. CASE REPORT Here, we describe a fetus with abnormal sonography findings showing a single umbilical artery and ventricular septal defects. Conventional karyotyping initially described the fetus as 46,XX,1q? and molecular cytogenetic analysis (CMA) revealed a 13-Mb deletion and 4.6-Mb duplication of regions 1q42.3q44 and 8q24.3, respectively. The father's karyotype was 46,XY. The mother's karyotype was 46,XX,t(1;8)(q42;q24). Therefore, the karyotype of the fetus was identified as 46,XX,der(1)t(1;8)(q42;q24) mat. After genetic counseling, the couple chose to terminate the pregnancy. We suggest that the ACTN2, RYR2 and PUF60 genes may be responsible for the ultrasound abnormalities observed in the fetus. CONCLUSION To the best of our knowledge, this is the first report of a 1q deletion and 8q duplication identified by prenatal detection. The application of karyotype analysis and CMA provides more accurate characterization for unidentified chromosomal anomalies, and benefits appropriate genetic counseling in the clinic.
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Affiliation(s)
- Fagui Yue
- Center for Reproductive Medicine, Center for Prenatal Diagnosis, First Hospital, Jilin University, Changchun, 130021, China; Jilin Engineering Research Center for Reproductive Medicine and Genetics, Jilin University, Changchun, 130021, China
| | - Meiling Sun
- Center for Reproductive Medicine, Center for Prenatal Diagnosis, First Hospital, Jilin University, Changchun, 130021, China; Jilin Engineering Research Center for Reproductive Medicine and Genetics, Jilin University, Changchun, 130021, China
| | - Hongguo Zhang
- Center for Reproductive Medicine, Center for Prenatal Diagnosis, First Hospital, Jilin University, Changchun, 130021, China; Jilin Engineering Research Center for Reproductive Medicine and Genetics, Jilin University, Changchun, 130021, China
| | - Yuting Jiang
- Center for Reproductive Medicine, Center for Prenatal Diagnosis, First Hospital, Jilin University, Changchun, 130021, China; Jilin Engineering Research Center for Reproductive Medicine and Genetics, Jilin University, Changchun, 130021, China
| | - Leilei Li
- Center for Reproductive Medicine, Center for Prenatal Diagnosis, First Hospital, Jilin University, Changchun, 130021, China; Jilin Engineering Research Center for Reproductive Medicine and Genetics, Jilin University, Changchun, 130021, China
| | - Jing He
- Center for Reproductive Medicine, Center for Prenatal Diagnosis, First Hospital, Jilin University, Changchun, 130021, China; Jilin Engineering Research Center for Reproductive Medicine and Genetics, Jilin University, Changchun, 130021, China
| | - Ruizhi Liu
- Center for Reproductive Medicine, Center for Prenatal Diagnosis, First Hospital, Jilin University, Changchun, 130021, China; Jilin Engineering Research Center for Reproductive Medicine and Genetics, Jilin University, Changchun, 130021, China.
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Lin S, Huang S, Ou X, Gu H, Wang Y, Li P, Zhou Y. Mosaic duplication of 8q24.1q24.3 detected by chromosomal microarray but not karyotyping in two unrelated fetuses with cardiac defects. Mol Cytogenet 2021; 14:26. [PMID: 34006293 PMCID: PMC8132396 DOI: 10.1186/s13039-021-00544-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Accepted: 04/05/2021] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Discordance between traditional cytogenetic and molecular cytogenetic tests is rare but not uncommon. The explanation of discordance between two genetic methods is difficult but especially important for genetic counseling, particularly for prenatal genetic diagnosis. CASE PRESENTATION Two unrelated fetuses were diagnosed with cardiac defects by prenatal ultrasound examination, and invasive cordocentesis was performed to obtain cord blood samples for prenatal genetic diagnosis. For both fetuses, chromosomal microarray analysis (CMA) detected a novel approximately 27-Mb mosaic duplication with a high copy number of approximately six to seven copies on chromosome 8q24.1q24.3 that was not identified by karyotyping. To exclude artificial errors and validate laboratory detection results, multiple procedures including copy number variation sequencing, fluorescence in situ hybridization, and short tandem repeat and single-nucleotide polymorphism genotype comparison were performed, confirming the discordant results between CMA and karyotyping. The potential causes of discordance between CMA and karyotyping using fetal blood lymphocytes are discussed; we suggest that extrachromosomal DNA or cell-free DNA fragmentation originating from certain tumor tissues with 8q24.1q24.3 duplication might deserve further investigation. CONCLUSIONS This study may be helpful for prenatal evaluation and genetic counseling for subsequent patients with similar mosaic 8q24.1q24.3 duplications. Additionally, more cases and further research are needed to understand whether mosaic 8q24.1q24.3 duplication is associated with certain genetic disorders and to investigate the causes of discordance between molecular and morphological methods.
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Affiliation(s)
- Shaobin Lin
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Sun Yat-sen University, 58 Zhong Shan Er Road, Guangzhou, 510080, Guangdong Province, China
| | - Shufang Huang
- Prenatal Diagnosis Center, Department of Obstetrics and Gynecology, Guangdong Provincial People' Hospital, Guangzhou, 510080, Guangdong Province, China
| | - Xueling Ou
- Faculty of Forensic Medicine, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, 510080, Guangdong Province, China
| | - Heng Gu
- NHC Key Laboratory of Male Reproduction and Genetics, Family Planning Research Institute of Guangdong Province, Guangzhou, 510080, Guangdong Province, China
| | - Yonghua Wang
- Prenatal Diagnosis Center, Department of Obstetrics and Gynecology, Guangdong Provincial People' Hospital, Guangzhou, 510080, Guangdong Province, China
| | - Ping Li
- Prenatal Diagnosis Center, Department of Obstetrics and Gynecology, Guangdong Provincial People' Hospital, Guangzhou, 510080, Guangdong Province, China.
| | - Yi Zhou
- Department of Obstetrics and Gynecology, The First Affiliated Hospital of Sun Yat-sen University, 58 Zhong Shan Er Road, Guangzhou, 510080, Guangdong Province, China.
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Corrêa T, Santos-Rebouças CB, Mayndra M, Schinzel A, Riegel M. Shared Neurodevelopmental Perturbations Can Lead to Intellectual Disability in Individuals with Distinct Rare Chromosome Duplications. Genes (Basel) 2021; 12:genes12050632. [PMID: 33922640 PMCID: PMC8146713 DOI: 10.3390/genes12050632] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Revised: 04/13/2021] [Accepted: 04/16/2021] [Indexed: 11/16/2022] Open
Abstract
Chromosomal duplications are associated with a large group of human diseases that arise mainly from dosage imbalance of genes within the rearrangements. Phenotypes range widely but are often associated with global development delay, intellectual disability, autism spectrum disorders, and multiple congenital abnormalities. How different contiguous genes from a duplicated genomic region interact and dynamically affect the expression of each other remains unclear in most cases. Here, we report a genomic comparative delineation of genes located in duplicated chromosomal regions 8q24.13q24.3, 18p11.32p11.21, and Xq22.3q27.2 in three patients followed up at our genetics service who has the intellectual disability (ID) as a common phenotype. We integrated several genomic data levels by identification of gene content within the duplications, protein-protein interactions, and functional analysis on specific tissues. We found functional relationships among genes from three different duplicated chromosomal regions, reflecting interactions of protein-coding genes and their involvement in common cellular subnetworks. Furthermore, the sharing of common significant biological processes associated with ID has been demonstrated between proteins from the different chromosomal regions. Finally, we elaborated a shared model of pathways directly or indirectly related to the central nervous system (CNS), which could perturb cognitive function and lead to ID in the three duplication conditions.
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Affiliation(s)
- Thiago Corrêa
- Department of Genetics, Institute of Biosciences, Federal University of Rio Grande do Sul UFRGS, Porto Alegre 91501-970, Brazil;
| | - Cíntia B. Santos-Rebouças
- Department of Genetics, Institute of Biology Roberto Alcantara Gomes, State University of Rio de Janeiro, Rio de Janeiro 20511-010, Brazil;
| | - Maytza Mayndra
- Children’s Hospital Jeser Amarante Faria, Joinville 89204-310, Brazil;
| | - Albert Schinzel
- Institute of Medical Genetics, University of Zurich, 8952 Schlieren, Switzerland;
| | - Mariluce Riegel
- Department of Genetics, Institute of Biosciences, Federal University of Rio Grande do Sul UFRGS, Porto Alegre 91501-970, Brazil;
- Medical Genetics Service, Hospital de Clínicas de Porto Alegre, Porto Alegre 90035-903, Brazil
- Correspondence:
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Bruni V, Roppa K, Scionti F, Apa R, Sestito S, Di Martino MT, Pensabene L, Concolino D. A 46,XY Female with a 9p24.3p24.1 Deletion and a 8q24.11q24.3 Duplication: A Case Report and Review of the Literature. Cytogenet Genome Res 2019; 158:74-82. [PMID: 31141803 DOI: 10.1159/000500619] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/17/2018] [Indexed: 12/11/2022] Open
Abstract
Deletion of distal 9p is associated with a rare clinical condition characterized by dysmorphic features, developmental delay, and ambiguous genitalia. The phenotype shows variable expressivity and is related to the size of the deletion. 8q24 duplication has been reported in only few cases to date, all showing dysmorphic features and mild psychomotor developmental delay. A case of chromosomal aberration involving a 9p terminal deletion with an 8q duplication has never been reported. Here, we describe a child with a female phenotype, male karyotype, dysmorphic features, ambiguous genitalia, and developmental delay. In order to assess the cause of the patient's phenotype, conventional karyotyping, FISH, and a chromosomal microarray analysis were performed on the patient and her parents. The cytogenetic and molecular analysis revealed an unbalanced chromosomal aberration with a duplication in the long arm of chromosome 8 at 8q24.11q24.3 associated with a distal deletion in the short arm of chromosome 9 at 9p24.3p24.1, derived from a maternal balanced translocation. We compared the clinical picture of our patient with other similar cases reported in the literature and found that some clinical findings, such as strabismus, symphalangism of the first finger, and cubitus valgus, have never been previously associated with 9p deletion or 8q duplication expanding the phenotypic range of this condition. This study is aimed to better define the clinical history and prognosis of patients with this rare chromosomal aberration.
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Farcas S, Erdelean D, Anne-Elise Szekely F, Navolan D, Andreescu N, Cioca A. A rare case of partial trisomy 8q24.12-q24.3 and partial monosomy of 8q24.3: Prenatal diagnosis and clinical findings. Taiwan J Obstet Gynecol 2019; 58:36-39. [PMID: 30638476 DOI: 10.1016/j.tjog.2018.11.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/03/2018] [Indexed: 11/28/2022] Open
Abstract
OBJECTIVE We describe a rare case of "pure" 8q duplication diagnosed prenatally by conventional karyotyping, that was further characterized by array comparative genomic hybridization (aCGH). CASE REPORT A 39-year-old, primigravida woman underwent amniocentesis at 23 weeks of gestation because of an abnormal second trimester maternal serum screening for Down syndrome. Conventional cytogenetic analysis demonstrated a karyotype of 46,XX,der(8) (q24.12q24.3) and aCGH identified a duplication of approximately 27 Mb, affecting the distal region of chromosome 8q24.12-q24.3. Parenteral karyotype of both parents was normal and excluded familial translocation or other rearrangements. Although prenatal ultrasound examination showed multiple anomalies the parents decided to keep the pregnancy. The baby was born at 38 weeks of gestation, with an Apgar score of 2. The evolution was unfavorable, and he died within the first 24 h of birth. CONCLUSION Molecular investigations contribute to a more accurate characterization of the patients with these rare duplication, but also for estimating their prognosis.
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Affiliation(s)
- Simona Farcas
- Genetics Department, Center of Genomic Medicine, University of Medicine and Pharmacy "Victor Babes" Timisoara, Romania; Genetics Department, Municipal Clinical Emergency Hospital of Timisoara, Timisoara, Romania
| | - Dragos Erdelean
- Department of Obstetrics-Gynecology and Neonatology, "Victor Babes" University of Medicine and Pharmacy, Timisoara, Romania
| | - Flavia Anne-Elise Szekely
- Regional Center of Medical Genetics Timis, Clinical Emergency Hospital for Children "Louis Turcanu" Timisoara, Timisoara, Romania
| | - Dan Navolan
- Department of Obstetrics-Gynecology and Neonatology, "Victor Babes" University of Medicine and Pharmacy, Timisoara, Romania
| | - Nicoleta Andreescu
- Genetics Department, Center of Genomic Medicine, University of Medicine and Pharmacy "Victor Babes" Timisoara, Romania
| | - Andreea Cioca
- Regional Center of Medical Genetics Timis, Clinical Emergency Hospital for Children "Louis Turcanu" Timisoara, Timisoara, Romania.
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Neuroimaging Features of San Luis Valley Syndrome. Case Rep Radiol 2015; 2015:748413. [PMID: 26425383 PMCID: PMC4575718 DOI: 10.1155/2015/748413] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2015] [Accepted: 08/23/2015] [Indexed: 12/22/2022] Open
Abstract
A 14-month-old Hispanic female with a history of double-outlet right ventricle and developmental delay in the setting of recombinant chromosome 8 syndrome was referred for neurologic imaging. Brain MR revealed multiple abnormalities primarily affecting midline structures, including commissural dysgenesis, vermian and brainstem hypoplasia/dysplasia, an interhypothalamic adhesion, and an epidermoid between the frontal lobes that enlarged over time. Spine MR demonstrated hypoplastic C1 and C2 posterior elements, scoliosis, and a borderline low conus medullaris position. Presented herein is the first illustration of neuroimaging findings from a patient with San Luis Valley syndrome.
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A rare interstitial duplication of 8q22.1-8q24.3 associated with syndromic bilateral cleft lip/palate. Case Rep Dent 2014; 2014:730375. [PMID: 25506438 PMCID: PMC4260438 DOI: 10.1155/2014/730375] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2014] [Accepted: 11/04/2014] [Indexed: 11/21/2022] Open
Abstract
We present a rare case of 8q interstitial duplication derived from maternal balanced translocations in a patient with bilateral cleft lip and palate in syndromic form associated with other congenital malformations. G-banding cytogenetic analysis revealed a chromosomal abnormality in the form of the karyotype 46,XX der(22)t(8;22)(q22.1;p11.1)mat. Chromosome microarray analysis evidenced a 49 Mb duplicated segment of chromosome 8q with no pathogenic imbalances on chromosome 22. Two siblings also carry the balanced translocation. We have compared this case with other “pure” trisomies of 8q patients reported in the literature and with genome wide association studies recently published. This work highlights the involvement of chromosome 8q in orofacial clefts.
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Dauber A, Golzio C, Guenot C, Jodelka FM, Kibaek M, Kjaergaard S, Leheup B, Martinet D, Nowaczyk MJM, Rosenfeld JA, Zeesman S, Zunich J, Beckmann JS, Hirschhorn JN, Hastings ML, Jacquemont S, Katsanis N. SCRIB and PUF60 are primary drivers of the multisystemic phenotypes of the 8q24.3 copy-number variant. Am J Hum Genet 2013; 93:798-811. [PMID: 24140112 DOI: 10.1016/j.ajhg.2013.09.010] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2013] [Revised: 09/10/2013] [Accepted: 09/16/2013] [Indexed: 11/19/2022] Open
Abstract
Copy-number variants (CNVs) represent a significant interpretative challenge, given that each CNV typically affects the dosage of multiple genes. Here we report on five individuals with coloboma, microcephaly, developmental delay, short stature, and craniofacial, cardiac, and renal defects who harbor overlapping microdeletions on 8q24.3. Fine mapping localized a commonly deleted 78 kb region that contains three genes: SCRIB, NRBP2, and PUF60. In vivo dissection of the CNV showed discrete contributions of the planar cell polarity effector SCRIB and the splicing factor PUF60 to the syndromic phenotype, and the combinatorial suppression of both genes exacerbated some, but not all, phenotypic components. Consistent with these findings, we identified an individual with microcephaly, short stature, intellectual disability, and heart defects with a de novo c.505C>T variant leading to a p.His169Tyr change in PUF60. Functional testing of this allele in vivo and in vitro showed that the mutation perturbs the relative dosage of two PUF60 isoforms and, subsequently, the splicing efficiency of downstream PUF60 targets. These data inform the functions of two genes not associated previously with human genetic disease and demonstrate how CNVs can exhibit complex genetic architecture, with the phenotype being the amalgam of both discrete dosage dysfunction of single transcripts and also of binary genetic interactions.
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Affiliation(s)
- Andrew Dauber
- Division of Endocrinology, Boston Children's Hospital, Boston, MA 02115, USA; Program in Medical and Population Genetics, Broad Institute, Cambridge, MA 02115, USA
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Valetto A, Bertini V, Toschi B, Simi P. A 47,XX,+der(21)t(8;21)(q24.2;q21.1) karyotype in a patient with mild intellectual disability, cleft lip, Hashimoto thyroiditis and hirsutism. Am J Med Genet A 2013; 161A:2389-92. [PMID: 23897865 DOI: 10.1002/ajmg.a.36039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2012] [Accepted: 04/19/2013] [Indexed: 11/11/2022]
Affiliation(s)
- Angelo Valetto
- Medical Genetic Unit, A.O.U. Pisana, Ospedale S. Chiara, Pisa, Italy.
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11
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Vera-Carbonell A, López-González V, Bafalliu JA, Piñero-Fernández J, Susmozas J, Sorli M, López-Pérez R, Fernández A, Guillén-Navarro E, López-Expósito I. Pre- and postnatal findings in a patient with a novel rec(8)dup(8q)inv(8)(p23.2q22.3) associated with San Luis Valley syndrome. Am J Med Genet A 2013; 161A:2369-75. [PMID: 23894102 DOI: 10.1002/ajmg.a.36103] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2012] [Accepted: 05/30/2013] [Indexed: 01/30/2023]
Abstract
San Luis Valley syndrome, which is due to a recombinant chromosome 8 (SLV Rec8) found in Hispanic individuals from Southwestern United States, is a well-established syndrome associated with intellectual disabilities and, frequently, severe cardiac anomalies. We report for the first time on a Moroccan girl with a recombinant chromosome 8 prenatally diagnosed as SLV Rec8 by conventional cytogenetic studies. At birth, an oligo array-CGH (105 K) defined the breakpoints and the size of the imbalanced segments, with a deletion of ≈ 2.27 Mb (8p23.2-pter) and a duplication of ≈ 41.93 Mb (8q22.3-qter); thus this recombinant chromosome 8 differed from that previously reported in SLV Rec8 syndrome. The phenotypic characteristics associated with this SLV Rec8 genotype overlap those commonly found in patients with 8q duplication reported in the literature. We review SLV Rec8 and other chromosome 8 aberrations and suggest that the overexpression of cardiogenic genes located at 8q may be the cause of the cardiac defects in this patient.
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Affiliation(s)
- Ascensión Vera-Carbonell
- Sección de Citogenética, Centro de Bioquímica y Genética Clínica, Hospital U. Virgen de la Arrixaca, El Palmar, Murcia, Spain
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12
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Concolino D, Iembo M, Moricca M, Rapsomaniki M, Marotta R, Galesi O, Fichera M, Romano C, Strisciuglio P. A de novo 8q22.2-24.3 duplication in a patient with mild phenotype. Eur J Med Genet 2012; 55:67-70. [DOI: 10.1016/j.ejmg.2011.09.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2011] [Accepted: 09/10/2011] [Indexed: 10/17/2022]
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