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Wang J, Zhou S, He F, Zhang X, Lu J, Zhang J, Zhang F, Xu X, Yang F, Xiong F. Familial Translocation t(2;4) (q37.3;p16.3), Resulting in a Partial Trisomy of 2q (or 4p) and a Partial Monosomy of 4p (or 2q), Causes Dysplasia. Front Genet 2021; 12:741607. [PMID: 34887900 PMCID: PMC8650131 DOI: 10.3389/fgene.2021.741607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 09/27/2021] [Indexed: 11/25/2022] Open
Abstract
Background: Wolf-Hirschhorn syndrome, a well-known contiguous microdeletion syndrome, is caused by deletions on chromosome 4p. While the clinical symptoms and the critical region for this disorder have been identified based on genotype-phenotype correlations, duplications in this region have been infrequently reported. Conclusion: Our case report shows that both deletions and duplications of the Wolf-Hirshhorn critical region cause intellectual disability/developmental delay and multiple congenital anomalies.
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Affiliation(s)
- Jian Wang
- Department of Fetal Medicine and Prenatal Diagnosis, Zhujiang Hospital, Southern Medical University, Guangzhou, China.,Department of Medical Genetics, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Shiyuan Zhou
- Henan Provincial Research Institute for Population and Family Planning Zhengzhou China, Zhengzhou, China
| | - Fei He
- Department of Medical Genetics, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Xuelian Zhang
- Department of Medical Genetics, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Jianqi Lu
- Obstetrics and Gynecology Hospital, NHC Key Laboratory of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), State Key Laboratory of Genetic Engineering at School of Life Sciences, Fudan University, Shanghai, China
| | - Jian Zhang
- Department of Medical Genetics, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China
| | - Feng Zhang
- Obstetrics and Gynecology Hospital, NHC Key Laboratory of Reproduction Regulation (Shanghai Institute of Planned Parenthood Research), State Key Laboratory of Genetic Engineering at School of Life Sciences, Fudan University, Shanghai, China
| | - Xiangmin Xu
- Department of Medical Genetics, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Single Cell Technology and Application, Guangzhou, China
| | - Fang Yang
- Department of Fetal Medicine and Prenatal Diagnosis, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Fu Xiong
- Department of Fetal Medicine and Prenatal Diagnosis, Zhujiang Hospital, Southern Medical University, Guangzhou, China.,Department of Medical Genetics, School of Basic Medical Sciences, Southern Medical University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Single Cell Technology and Application, Guangzhou, China
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Wang C, Ren H, Dong H, Liang M, Wu Q, Liao Y. 18q22.1-qter deletion and 4p16.3 microduplication in a boy with speech delay and mental retardation: case report and review of the literature. Mol Cytogenet 2018; 11:55. [PMID: 30377449 PMCID: PMC6194714 DOI: 10.1186/s13039-018-0404-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Accepted: 10/01/2018] [Indexed: 11/13/2022] Open
Abstract
Background Deletions involving the long arm of chromosome 18 have been associated with a highly variable phenotypic spectrum that is related to the extent of the deleted region. Duplications in chromosomal region 4p16.3 have also been shown to cause 4p16.3 microduplication syndrome. Most reported patients of trisomy 4p16.3 have more duplications, including the Wolf-Hirschhorn critical region (WHSCR). Here, we present a patient with speech delay and mental retardation caused by a deletion of 18q (18q22.1-qter) and terminal microduplication of 4p (4p16.3-pter) distal to WHSCR. Case presentation The patient was a 23-month-old boy with moderate growth retardation, severe speech delay, mental retardation, and dysmorphic features. Single nucleotide polymorphism (SNP) array analysis confirmed an 11.2-Mb terminal deletion at 18q22.1 and revealed a 1.8-Mb terminal duplication of 4p16.3. Our patient showed clinical overlap with these two syndromes, although his overall features were milder than what had been previously described. Some dosage-sensitive genes on the 18q terminal deleted region and 4p16.3 duplicated region of the present case may have contributed to his phenotype. Conclusions This is the first report of a patient with combined terminal deletion of 18q22.1 and duplication of 4p16.3. In this report, we provide clinical and molecular evidence supporting that the microduplication in 4p16.3, distal to WHSCR, is pathogenic. The coexistence of two chromosome aberrations complicates the clinical picture and creates a chimeric phenotype. This report provides further information on the genotype-phenotype correlation of 18q terminal deletion and 4p microduplication.
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Affiliation(s)
- Chunjing Wang
- 1Department of Life Sciences, Bengbu Medical College, 2600 Donghai Avenue, Bengbu, Anhui 233030 People's Republic of China
| | - Huanhuan Ren
- 1Department of Life Sciences, Bengbu Medical College, 2600 Donghai Avenue, Bengbu, Anhui 233030 People's Republic of China
| | - Huaifu Dong
- 2Department of Paediatrics, The First Affiliated Hospital of Bengbu Medical College, 2600 Donghai Avenue, Bengbu, Anhui China
| | - Meng Liang
- 1Department of Life Sciences, Bengbu Medical College, 2600 Donghai Avenue, Bengbu, Anhui 233030 People's Republic of China
| | - Qi Wu
- 1Department of Life Sciences, Bengbu Medical College, 2600 Donghai Avenue, Bengbu, Anhui 233030 People's Republic of China
| | - Yaping Liao
- 1Department of Life Sciences, Bengbu Medical College, 2600 Donghai Avenue, Bengbu, Anhui 233030 People's Republic of China
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Bi W, Cheung SW, Breman AM, Bacino CA. 4p16.3 microdeletions and microduplications detected by chromosomal microarray analysis: New insights into mechanisms and critical regions. Am J Med Genet A 2016; 170:2540-50. [DOI: 10.1002/ajmg.a.37796] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2016] [Accepted: 05/30/2016] [Indexed: 12/19/2022]
Affiliation(s)
- Weimin Bi
- Department of Molecular and Human Genetics; Baylor College of Medicine; One Baylor Plaza; Houston Texas
| | - Sau-Wai Cheung
- Department of Molecular and Human Genetics; Baylor College of Medicine; One Baylor Plaza; Houston Texas
| | - Amy M. Breman
- Department of Molecular and Human Genetics; Baylor College of Medicine; One Baylor Plaza; Houston Texas
| | - Carlos A. Bacino
- Department of Molecular and Human Genetics; Baylor College of Medicine; One Baylor Plaza; Houston Texas
- Texas Children's Hospital; Houston Texas
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Midro AT, Zollino M, Wiland E, Panasiuk B, Iwanowski PS, Murdolo M, Śmigiel R, Sąsiadek M, Pilch J, Kurpisz M. Meiotic and pedigree segregation analyses in carriers of t(4;8)(p16;p23.1) differing in localization of breakpoint positions at 4p subband 4p16.3 and 4p16.1. J Assist Reprod Genet 2015; 33:189-97. [PMID: 26637389 PMCID: PMC4759004 DOI: 10.1007/s10815-015-0622-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Accepted: 11/16/2015] [Indexed: 10/26/2022] Open
Abstract
PURPOSE The purpose of this study was to compare meiotic segregation in sperm cells from two carriers with t(4;8)(p16;p23.1) reciprocal chromosome translocations (RCTs), differing in localization of the breakpoint positions at the 4p subband-namely, 4p16.3 (carrier 1) and 4p16.1 (carrier 2)-and to compare data of the pedigree analyses performed by direct method. METHODS Three-color fluorescent in situ hybridization (FISH) on sperm cells and FISH mapping for the evaluation of the breakpoint positions, data from pedigrees, and direct segregation analysis of the pedigrees were performed. RESULTS Similar proportions of normal/balanced and unbalanced sperm cells were found in both carriers. The most common was an alternate type of segregation (about 52 % and about 48 %, respectively). Unbalanced adjacent I and adjacent II karyotypes were found in similar proportions about 15 %. The direct segregation analysis (following Stengel-Rutkowski) of the pedigree of carriers of t(4;8)(p16.1;p23.1) was performed and results were compared with the data of the pedigree segregation analysis obtained earlier through the indirect method. The probability of live-born progeny with unbalanced karyotype for carriers of t(4;8)(p16.1;p23.1) was moderately high at 18.8 %-comparable to the value obtained using the indirect method for the same carriership, which was 12 %. This was, however, markedly lower than the value of 41.2 % obtained through the pedigree segregation indirect analysis estimated for carriers of t(4;8)(p16.3;p23.1), perhaps due to the unique composition of genes present within the 4p16.1-4p 16.3 region. CONCLUSIONS Revealed differences in pedigree segregation analysis did not correspond to the very similar profile of meiotic segregation patterns presented by carrier 1 and carrier 2. Most probably, such discordances may be due to differences in embryo survival rates arising from different genetic backgrounds.
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Affiliation(s)
- Alina T Midro
- Department of Clinical Genetics, Medical University of Białystok, Waszyngtona 13, 15-089, Białystok, PO Box 22, Poland.
| | - Marcella Zollino
- Department of Medical Genetics, Università Cattolica Sacro Cuore, Rome, Italy
| | - Ewa Wiland
- Department of Reproductive Biology and Stem Cells, Institute of Human Genetics, Polish Academy of Sciences, Strzeszyńska 32, 60-479, Poznań, Poland
| | - Barbara Panasiuk
- Department of Clinical Genetics, Medical University of Białystok, Waszyngtona 13, 15-089, Białystok, PO Box 22, Poland
| | - Piotr S Iwanowski
- Department of Clinical Genetics, Medical University of Białystok, Waszyngtona 13, 15-089, Białystok, PO Box 22, Poland
| | - Marina Murdolo
- Department of Medical Genetics, Università Cattolica Sacro Cuore, Rome, Italy
| | - Robert Śmigiel
- Department of Genetics, Medical University of Wrocław, Wrocław, Poland
| | - Maria Sąsiadek
- Department of Genetics, Medical University of Wrocław, Wrocław, Poland
| | - Jacek Pilch
- Department of Child Neurology, Medical University of Silesia, Katowice, Poland
| | - Maciej Kurpisz
- Department of Reproductive Biology and Stem Cells, Institute of Human Genetics, Polish Academy of Sciences, Strzeszyńska 32, 60-479, Poznań, Poland.
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Abstract
Wolf-Hirschhorn syndrome is caused by a deletion of a segment on the short arm (p) of chromosome 4. The major features of this disorder include a characteristic facial appearance known as the "Greek helmet," delayed growth and development; prenatally and postnatally, intellectual disabilities, and seizures. To provide comprehensive and appropriate nursing and medical care to infants with Wolf-Hirschhorn syndrome, it is imperative to know and understand the disorder. A case study of a 36 weeks' gestational age white-Hispanic male infant with Wolf-Hirschhorn syndrome is presented with the purpose of increasing clinical knowledge and the implications for the clinical nurse and neonatal nurse practitioner.
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