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Li JW, Qian YJ, Mao SJ, Chao YQ, Qin YF, Hu CX, Li ZL, Zou CC. Clinical features associated with maternal uniparental disomy for chromosome 6. Mol Cytogenet 2024; 17:18. [PMID: 39075593 PMCID: PMC11287833 DOI: 10.1186/s13039-024-00688-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Accepted: 07/20/2024] [Indexed: 07/31/2024] Open
Abstract
BACKGROUND Maternal uniparental disomy for chromosome 6 (upd(Cajaiba MM, Witchel S, Madan-Khetarpal S, Hoover J, Hoffner L, Macpherson T, et al. Prenatal diagnosis of trisomy 6 rescue resulting in paternal UPD6 with novel placental findings. Am J Med Genet Part A. 2011;155 A(8):1996-2002.)mat) has been previously reported to cause intrauterine growth restriction (IUGR), but the specific clinical phenotype has not been defined. Based on clinical data from two new cases and patients from the literature, specific phenotypes and mechanisms will be discussed further. CASE PRESENTATION In case 1, a maternal isodisomy mixed with a heterodisomy was found on chromosome 6, including a regional absence of heterozygosity between 6q23.3 and 6q27. In case 2, a homozygous SCUBE3 mutation and upd(Cajaiba MM, Witchel S, Madan-Khetarpal S, Hoover J, Hoffner L, Macpherson T, et al. Prenatal diagnosis of trisomy 6 rescue resulting in paternal UPD6 with novel placental findings. Am J Med Genet Part A. 2011;155 A(8):1996-2002.)mat, involving the 6p21.1-25.1 region were found. Clinical data related to upd(Cajaiba MM, Witchel S, Madan-Khetarpal S, Hoover J, Hoffner L, Macpherson T, et al. Prenatal diagnosis of trisomy 6 rescue resulting in paternal UPD6 with novel placental findings. Am J Med Genet Part A. 2011;155 A(8):1996-2002.)mat were also reviewed. Of all the 21 reported cases with upd(Cajaiba MM, Witchel S, Madan-Khetarpal S, Hoover J, Hoffner L, Macpherson T, et al. Prenatal diagnosis of trisomy 6 rescue resulting in paternal UPD6 with novel placental findings. Am J Med Genet Part A. 2011;155 A(8):1996-2002.)mat (including our 2 cases), 18 (85.7%) presented IUGR. CONCLUSIONS The phenotypes of the two newly identified patients with upd(Cajaiba MM, Witchel S, Madan-Khetarpal S, Hoover J, Hoffner L, Macpherson T, et al. Prenatal diagnosis of trisomy 6 rescue resulting in paternal UPD6 with novel placental findings. Am J Med Genet Part A. 2011;155 A(8):1996-2002.)mat further suggest that IUGR is associated with upd(Cajaiba MM, Witchel S, Madan-Khetarpal S, Hoover J, Hoffner L, Macpherson T, et al. Prenatal diagnosis of trisomy 6 rescue resulting in paternal UPD6 with novel placental findings. Am J Med Genet Part A. 2011;155 A(8):1996-2002.)mat and case 2 is the first reported upd(Cajaiba MM, Witchel S, Madan-Khetarpal S, Hoover J, Hoffner L, Macpherson T, et al. Prenatal diagnosis of trisomy 6 rescue resulting in paternal UPD6 with novel placental findings. Am J Med Genet Part A. 2011;155 A(8):1996-2002.)mat patient with a homozygous SCUBE3 gene mutation. However, the specific phenotypes involved in upd(Cajaiba MM, Witchel S, Madan-Khetarpal S, Hoover J, Hoffner L, Macpherson T, et al. Prenatal diagnosis of trisomy 6 rescue resulting in paternal UPD6 with novel placental findings. Am J Med Genet Part A. 2011;155 A(8):1996-2002.)mat and the related mechanisms need to be further studied.
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Affiliation(s)
- Jing-Wen Li
- Department of Endocrinology, the Children's Hospital of Zhejiang University School of Medicine, No 3333 Binsheng Road, Hangzhou, 310052, China
| | - Yan-Jie Qian
- Department of Endocrinology, the Children's Hospital of Zhejiang University School of Medicine, No 3333 Binsheng Road, Hangzhou, 310052, China
| | - Shao-Jia Mao
- Department of Endocrinology, the Children's Hospital of Zhejiang University School of Medicine, No 3333 Binsheng Road, Hangzhou, 310052, China
| | - Yun-Qi Chao
- Department of Endocrinology, the Children's Hospital of Zhejiang University School of Medicine, No 3333 Binsheng Road, Hangzhou, 310052, China
| | - Yi-Fang Qin
- Department of Endocrinology, the Children's Hospital of Zhejiang University School of Medicine, No 3333 Binsheng Road, Hangzhou, 310052, China
| | - Chen-Xi Hu
- Department of Endocrinology, the Children's Hospital of Zhejiang University School of Medicine, No 3333 Binsheng Road, Hangzhou, 310052, China
| | - Zheng-Lan Li
- Department of Endocrinology, the Children's Hospital of Zhejiang University School of Medicine, No 3333 Binsheng Road, Hangzhou, 310052, China
- Department of Pediatrics, the Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, 215008, China
| | - Chao-Chun Zou
- Department of Endocrinology, the Children's Hospital of Zhejiang University School of Medicine, No 3333 Binsheng Road, Hangzhou, 310052, China.
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Jiang Y, Xiao YX, Xiong JJ, Zhang VW, Dong C, Xu L, Liu F. Maternal uniparental disomy for chromosome 6 in 2 prenatal cases with IUGR: case report and literature review. Mol Cytogenet 2024; 17:1. [PMID: 38173004 PMCID: PMC10765649 DOI: 10.1186/s13039-023-00670-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Accepted: 12/12/2023] [Indexed: 01/05/2024] Open
Abstract
BACKGROUND Uniparental disomy (UPD) is a rare genetic condition leading to potential disease risks. Maternal UPD of chromosome 6 upd(6)mat is exceptionally rare, with limited cases reported. This study reported two new cases of upd(6)mat and reviewed the literature of previous cases. CASE PRESENTATION Both cases exhibited intrauterine growth restriction (IUGR), and genetic analysis confirmed upd(6)mat in each case. The literature review identified a total of 19 cases. IUGR and preterm labor were the most common two symptoms observed, and additional anomalies and genetic variations were also reported in some cases. CONCLUSION upd(6)mat is potentially associatied with IUGR, but the precise genotype-phenotype relationship remains unclear. The cases with upd(6)mat may present clinical features due to imprinting disorders.
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Affiliation(s)
- Yan Jiang
- Chongqing Health Center for Women and Children/Women and Children's Hospital of Chongqing Medical University, Chongqing, China
| | - Yang Xue Xiao
- Chongqing Health Center for Women and Children/Women and Children's Hospital of Chongqing Medical University, Chongqing, China
| | - Jiao Jiao Xiong
- Chongqing Health Center for Women and Children/Women and Children's Hospital of Chongqing Medical University, Chongqing, China
| | | | | | - Lei Xu
- AmCare Genomics Lab, Guangzhou, China
| | - Fang Liu
- Chongqing Health Center for Women and Children/Women and Children's Hospital of Chongqing Medical University, Chongqing, China.
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Wu X, He S, Li Y, Guo D, Chen X, Liang B, Wang M, Huang H, Xu L. Fetal genetic findings by chromosomal microarray analysis and karyotyping for fetal growth restriction without structural malformations at a territory referral center: 10-year experience. BMC Pregnancy Childbirth 2023; 23:73. [PMID: 36703098 PMCID: PMC9878785 DOI: 10.1186/s12884-023-05394-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Accepted: 01/19/2023] [Indexed: 01/27/2023] Open
Abstract
BACKGROUND Prenatal invasive genetic testing is commonly recommended to pregnancies of early-onset FGR or FGR combined with a structural defect. Our study aimed to explore the genetic findings for FGR without structural malformations according to cytogenetic karyotyping and single nucleotide polymorphism array (SNP array) technology over a 10-year period. METHODS A total of 488 pregnancies diagnosed with FGR without structural malformation were retrospectively reviewed. Cytogenetic karyotyping was performed on all the subjects, and SNP array was available from 272 of them. Based on the gestational age at onset, the cohort was classified into four groups: ≤ 24, 25-28, 29-32, and > 32 weeks of gestation. According to the ultrasound findings, they were grouped into isolated FGR, FGR with soft markers, and FGR with non-structural anomalies. In pregnancies of young maternal age, based on the results of maternal serum screening (MSS), they were categorized into high-risk and low-risk MSS groups. RESULTS Nineteen (3.9%) cases of chromosomal abnormalities were detected by cytogenetic karyotyping, including 11 cases of numerical abnormalities, 5 cases of structural abnormalities, and 3 cases of mosaicism. Trisomy 21 was the most frequent abnormality. Abnormal karyotypes were more frequently observed in cases diagnosed at ≤ 24 weeks (7.2%) than those in any other group. Among pregnancies with normal karyotype, an incremental yield of 4.2% were revealed by SNP array technology regarding clinically relevant aberrations. The additional detection rates by SNP array in cases diagnosed at ≤ 24 weeks (6.5%), cases with soft markers (9.5%), and cases with high-risk MSS (12.0%) were higher than those in other groups within each classification. All the cases with abnormal karyotypes and 7 out of 11 pregnancies with clinically relevant anomalies revealed by SNP array alone resulted in pregnancy terminations. CONCLUSION Chromosome abnormality is an important etiology for FGR with no associated structural malformations, and plays a crucial role in pregnancies decision-making. SNP array improves the detection of genetic anomalies especially in FGR diagnosed at ≤ 24 weeks, FGR combined with soft makers, and FGR combined with high-risk MSS.
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Affiliation(s)
- Xiaoqing Wu
- grid.256112.30000 0004 1797 9307Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, No.18 Daoshan Road, Fuzhou City, Fujian, 350001 China ,Fujian Provincial Key Laboratory for Prenatal Diagnosis and Birth Defect, Fuzhou, Fujian China ,grid.256112.30000 0004 1797 9307Department of Laboratory Medicine, Fujian Medical University, Fuzhou, Fujian China
| | - Shuqiong He
- grid.256112.30000 0004 1797 9307Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, No.18 Daoshan Road, Fuzhou City, Fujian, 350001 China ,Fujian Provincial Key Laboratory for Prenatal Diagnosis and Birth Defect, Fuzhou, Fujian China
| | - Ying Li
- grid.256112.30000 0004 1797 9307Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, No.18 Daoshan Road, Fuzhou City, Fujian, 350001 China ,Fujian Provincial Key Laboratory for Prenatal Diagnosis and Birth Defect, Fuzhou, Fujian China
| | - Danhua Guo
- grid.256112.30000 0004 1797 9307Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, No.18 Daoshan Road, Fuzhou City, Fujian, 350001 China ,Fujian Provincial Key Laboratory for Prenatal Diagnosis and Birth Defect, Fuzhou, Fujian China
| | - Xuemei Chen
- grid.256112.30000 0004 1797 9307Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, No.18 Daoshan Road, Fuzhou City, Fujian, 350001 China ,Fujian Provincial Key Laboratory for Prenatal Diagnosis and Birth Defect, Fuzhou, Fujian China
| | - Bin Liang
- grid.256112.30000 0004 1797 9307Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, No.18 Daoshan Road, Fuzhou City, Fujian, 350001 China ,Fujian Provincial Key Laboratory for Prenatal Diagnosis and Birth Defect, Fuzhou, Fujian China
| | - Meiying Wang
- grid.256112.30000 0004 1797 9307Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, No.18 Daoshan Road, Fuzhou City, Fujian, 350001 China ,Fujian Provincial Key Laboratory for Prenatal Diagnosis and Birth Defect, Fuzhou, Fujian China
| | - Hailong Huang
- grid.256112.30000 0004 1797 9307Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, No.18 Daoshan Road, Fuzhou City, Fujian, 350001 China ,Fujian Provincial Key Laboratory for Prenatal Diagnosis and Birth Defect, Fuzhou, Fujian China
| | - Liangpu Xu
- grid.256112.30000 0004 1797 9307Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital, College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, No.18 Daoshan Road, Fuzhou City, Fujian, 350001 China ,Fujian Provincial Key Laboratory for Prenatal Diagnosis and Birth Defect, Fuzhou, Fujian China
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4
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Genetics Etiologies Associated with Fetal Growth Restriction. MATERNAL-FETAL MEDICINE 2022. [DOI: 10.1097/fm9.0000000000000159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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5
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Chen Y, Xie Y, Jiang Y, Luo Q, Shi L, Zeng S, Zhuang J, Lyu G. The Genetic Etiology Diagnosis of Fetal Growth Restriction Using Single-Nucleotide Polymorphism-Based Chromosomal Microarray Analysis. Front Pediatr 2021; 9:743639. [PMID: 34722424 PMCID: PMC8555260 DOI: 10.3389/fped.2021.743639] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2021] [Accepted: 09/06/2021] [Indexed: 11/13/2022] Open
Abstract
Background: An increase in pathogenic copy number variants (pCNVs) has been recognized to associate with fetal growth restriction (FGR). Here, we aim to explore the application value of chromosomal microarray analysis (CMA) in prenatal diagnosis of FGR. Methods: Prenatal ultrasound was applied to identify FGR. A total of 149 pregnant women with FGR were enrolled in our study. All subjects underwent karyotype analysis and CMA to reveal the chromosomal abnormalities. Results: In this study, all subjects were successfully detected by karyotype and CMA analyses. Of these subjects, the chromosomal abnormalities detection rate was 5.37% (8/149) for karyotyping and 13.42% (20/149) for CMA, respectively. Among them, an 8.05% (12/149) incremental yield of CMA over karyotype analysis was observed (p = 0.004). In addition, a significant difference of pCNV detection rate was observed between the groups with different high-risk factors (p = 0.005). The FGR with structural anomalies group showed the highest pCNV detection rate (33.33%), followed by the FGR with non-structural anomalies group (8.77%) and the isolated FGR group (8.06%). Conclusion: In conclusion, CMA technology showed an effective application value in etiology diagnosis of FGR. We believe that CMA should be recommended as first-line detection technology for prenatal diagnosis in FGR.
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Affiliation(s)
- Yu'e Chen
- Ultrasonography, Quanzhou Women's and Children's Hospital, Quanzhou, China
| | - Yingjun Xie
- Department of Obstetrics and Gynecology, Key Laboratory for Major Obstetric Diseases of Guangdong Province, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Key Laboratory of Reproduction and Genetics of Guangdong Higher Education Institutes, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Yuying Jiang
- Prenatal Diagnosis Center, Quanzhou Women's and Children's Hospital, Quanzhou, China
| | - Qi Luo
- Department of Public Health for Women and Children, Quanzhou Women's and Children's Hospital, Quanzhou, China
| | - Lijing Shi
- Ultrasonography, Quanzhou Women's and Children's Hospital, Quanzhou, China
| | - Shuhong Zeng
- Prenatal Diagnosis Center, Quanzhou Women's and Children's Hospital, Quanzhou, China
| | - Jianlong Zhuang
- Prenatal Diagnosis Center, Quanzhou Women's and Children's Hospital, Quanzhou, China
| | - Guorong Lyu
- Ultrasonography, The Second Affiliated Hospital of Fujian Medical University, Quanzhou, China
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6
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Recent Advances in the Noninvasive Prenatal Testing for Chromosomal Abnormalities Using Maternal Plasma DNA. JOURNAL OF FETAL MEDICINE 2020. [DOI: 10.1007/s40556-019-00229-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
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7
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Cheng SSW, Chan KYK, Leung KKP, Au PKC, Tam WK, Li SKM, Luk HM, Kan ASY, Chung BHY, Lo IFM, Tang MHY. Experience of chromosomal microarray applied in prenatal and postnatal settings in Hong Kong. AMERICAN JOURNAL OF MEDICAL GENETICS PART C-SEMINARS IN MEDICAL GENETICS 2019; 181:196-207. [PMID: 30903683 DOI: 10.1002/ajmg.c.31697] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 03/06/2019] [Accepted: 03/07/2019] [Indexed: 12/14/2022]
Abstract
Chromosomal microarray (CMA) is recommended as a first tier investigation for patients with developmental delay (DD), intellectual disability (ID), autistic spectrum disorder (ASD), and multiple congenital anomalies (MCA). It is widely used in the prenatal and postnatal settings for detection of chromosomal aberrations. This is a retrospective review of all array comparative genomic hybridization (aCGH/ array CGH) findings ascertained in two major prenatal and postnatal genetic diagnostic centers in Hong Kong from June 2012 to December 2017. Medical records were reviewed for cases with pathogenic and variants of uncertain clinical significance (VUS). Classification of copy number variants (CNVs) was based on current knowledge and experience by August 2018. The aims of this review are to study the diagnostic yield of array CGH application in prenatal and postnatal settings in Hong Kong and to describe the spectrum of abnormalities found. Prenatal indications included abnormal ultrasound findings, positive Down syndrome screening, abnormal noninvasive prenatal test results, advanced maternal age and family history of chromosomal or genetic abnormalities. Postnatal indications included unexplained DD, ID, ASD, and MCA. A total of 1,261 prenatal subjects and 3,096 postnatal patients were reviewed. The prenatal diagnostic yield of pathogenic CNV and VUS (excluding those detectable by karyotype) was 3.5%. The postnatal diagnostic yield of pathogenic CNV was 15.2%. The detection rates for well-defined microdeletion and microduplication syndromes were 4.6% in prenatal and 6.1% (1 in 16 index patients) in postnatal cases, respectively. Chromosomes 15, 16, and 22 accounted for over 21 and 25% of pathogenic CNVs detected in prenatal and postnatal cohorts, respectively. This review provides the first large scale overview of genomic imbalance of mostly Chinese patients in prenatal and postnatal settings.
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Affiliation(s)
| | - Kelvin Y K Chan
- Prenatal Diagnostic Laboratory, Tsan Yuk Hospital, Hong Kong
| | | | - Patrick K C Au
- Prenatal Diagnostic Laboratory, Tsan Yuk Hospital, Hong Kong
| | - Wai-Keung Tam
- Prenatal Diagnostic Laboratory, Tsan Yuk Hospital, Hong Kong
| | - Samuel K M Li
- Prenatal Diagnostic Laboratory, Tsan Yuk Hospital, Hong Kong
| | - Ho-Ming Luk
- Department of Health, Clinical Genetic Service, Hong Kong
| | - Anita S Y Kan
- Department of Obstetrics and Gynaecology, Queen Mary Hospital, Hong Kong
| | - Brian H Y Chung
- Department of Obstetrics and Gynaecology, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, HKSAR.,Department of Paediatrics and Adolescent Medicine, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, HKSAR
| | - Ivan F M Lo
- Department of Health, Clinical Genetic Service, Hong Kong
| | - Mary H Y Tang
- Department of Obstetrics and Gynaecology, Li Ka Shing Faculty of Medicine, University of Hong Kong, Hong Kong, HKSAR
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Bravo García-Morato M, Aracil Santos FJ, Briones AC, Blázquez Moreno A, Del Pozo Maté Á, Domínguez-Soto Á, Beato Merino MJ, Del Pino Molina L, Torres Canizales J, Marin AV, Vallespín García E, Feito Rodríguez M, Plaza López Sabando D, Jiménez-Reinoso A, Mozo Del Castillo Y, Sanz Santaeufemia FJ, de Lucas-Laguna R, Cárdenas PP, Casamayor Polo L, Coronel Díaz M, Valés-Gómez M, Roldán Santiago E, Ferreira Cerdán A, Nevado Blanco J, Corbí ÁL, Reyburn HT, Regueiro JR, López-Granados E, Rodríguez Pena R. New human combined immunodeficiency caused by interferon regulatory factor 4 (IRF4) deficiency inherited by uniparental isodisomy. J Allergy Clin Immunol 2018; 141:1924-1927.e18. [PMID: 29408330 DOI: 10.1016/j.jaci.2017.12.995] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Revised: 12/01/2017] [Accepted: 12/27/2017] [Indexed: 01/01/2023]
Affiliation(s)
- María Bravo García-Morato
- Department of Immunology, Hospital Universitario La Paz, Madrid, Spain; Lymphocyte Pathophysiology Group, La Paz Institute of Biomedical Research, IdiPAZ, Madrid, Spain.
| | | | - Alejandro Contreras Briones
- Department of Microbiology I (Immunology), School of Medicine, Universidad Complutense de Madrid, 12 de Octubre Health Research Institute (imas12), Madrid, Spain
| | - Alfonso Blázquez Moreno
- Department of Immunology and Oncology, Centro Nacional de Biotecnología-Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - Ángela Del Pozo Maté
- Institute of Medical and Molecular Genetics (INGEMM), Centro de Investigaciones Biológicas, CSIC, Madrid, Spain
| | | | | | - Lucía Del Pino Molina
- Department of Immunology, Hospital Universitario La Paz, Madrid, Spain; Lymphocyte Pathophysiology Group, La Paz Institute of Biomedical Research, IdiPAZ, Madrid, Spain
| | - Juan Torres Canizales
- Department of Immunology, Hospital Universitario La Paz, Madrid, Spain; Lymphocyte Pathophysiology Group, La Paz Institute of Biomedical Research, IdiPAZ, Madrid, Spain
| | - Ana Victoria Marin
- Department of Microbiology I (Immunology), School of Medicine, Universidad Complutense de Madrid, 12 de Octubre Health Research Institute (imas12), Madrid, Spain
| | - Elena Vallespín García
- Institute of Medical and Molecular Genetics (INGEMM), Centro de Investigaciones Biológicas, CSIC, Madrid, Spain
| | | | | | - Anaïs Jiménez-Reinoso
- Department of Microbiology I (Immunology), School of Medicine, Universidad Complutense de Madrid, 12 de Octubre Health Research Institute (imas12), Madrid, Spain
| | | | | | | | - Paula P Cárdenas
- Department of Microbiology I (Immunology), School of Medicine, Universidad Complutense de Madrid, 12 de Octubre Health Research Institute (imas12), Madrid, Spain
| | | | | | - Mar Valés-Gómez
- Department of Immunology and Oncology, Centro Nacional de Biotecnología-Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | | | - Antonio Ferreira Cerdán
- Department of Immunology, Hospital Universitario La Paz, Madrid, Spain; Lymphocyte Pathophysiology Group, La Paz Institute of Biomedical Research, IdiPAZ, Madrid, Spain
| | - Julián Nevado Blanco
- Institute of Medical and Molecular Genetics (INGEMM), Centro de Investigaciones Biológicas, CSIC, Madrid, Spain
| | - Ángel L Corbí
- Myeloid Cell Laboratory, Centro de Investigaciones Biológicas, CSIC, Madrid, Spain
| | - Hugh T Reyburn
- Department of Immunology and Oncology, Centro Nacional de Biotecnología-Consejo Superior de Investigaciones Científicas, Madrid, Spain
| | - José Ramón Regueiro
- Department of Microbiology I (Immunology), School of Medicine, Universidad Complutense de Madrid, 12 de Octubre Health Research Institute (imas12), Madrid, Spain
| | - Eduardo López-Granados
- Department of Immunology, Hospital Universitario La Paz, Madrid, Spain; Lymphocyte Pathophysiology Group, La Paz Institute of Biomedical Research, IdiPAZ, Madrid, Spain
| | - Rebeca Rodríguez Pena
- Department of Immunology, Hospital Universitario La Paz, Madrid, Spain; Lymphocyte Pathophysiology Group, La Paz Institute of Biomedical Research, IdiPAZ, Madrid, Spain
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9
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Eggermann T, Oehl-Jaschkowitz B, Dicks S, Thomas W, Kanber D, Albrecht B, Begemann M, Kurth I, Beygo J, Buiting K. The maternal uniparental disomy of chromosome 6 (upd(6)mat) "phenotype": result of placental trisomy 6 mosaicism? Mol Genet Genomic Med 2017; 5:668-677. [PMID: 29178649 PMCID: PMC5702562 DOI: 10.1002/mgg3.324] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2017] [Revised: 06/28/2017] [Accepted: 07/05/2017] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Maternal uniparental disomy of chromosome 6 (upd(6)mat) is a rare finding and its clinical relevance is currently unclear. Based on clinical data from two new cases and patients from the literature, the pathogenetic significance of upd(6)mat is delineated. METHODS Own cases were molecularly characterized for isodisomic uniparental regions on chromosome 6. For further cases with upd(6)mat, a literature search was conducted and genetic and clinical data were ascertained. RESULTS Comparison of isodisomic regions between the new upd(6)mat cases and those from four reports did not reveal any common isodisomic region. Among the patients with available cytogenetic data, five had a normal karyotype in lymphocytes, whereas a trisomy 6 (mosaicism) was detected prenatally in four cases. A common clinical picture was not obvious in upd(6)mat, but intrauterine growth restriction (IUGR) and preterm delivery were frequent. CONCLUSION A common upd(6)mat phenotype is not obvious, but placental dysfunction due to trisomy 6 mosaicism probably contributes to IUGR and preterm delivery. In fact, other clinical features observed in upd(6)mat patients might be caused by homozygosity of recessive mutations or by an undetected trisomy 6 cell line. Upd(6)mat itself is not associated with clinical features, and can rather be regarded as a biomarker. In case upd(6)mat is detected, the cause for the phenotype is identified indirectly, but the UPD is not the basic cause.
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Affiliation(s)
- Thomas Eggermann
- Medical Faculty, Institute of Human Genetics, RWTH Aachen University, Aachen, Germany
| | | | - Severin Dicks
- Medical Faculty, Institute of Human Genetics, RWTH Aachen University, Aachen, Germany
| | | | - Deniz Kanber
- Institute of Human Genetics, University of Essen, Essen, Germany
| | - Beate Albrecht
- Institute of Human Genetics, University of Essen, Essen, Germany
| | - Matthias Begemann
- Medical Faculty, Institute of Human Genetics, RWTH Aachen University, Aachen, Germany
| | - Ingo Kurth
- Medical Faculty, Institute of Human Genetics, RWTH Aachen University, Aachen, Germany
| | - Jasmin Beygo
- Institute of Human Genetics, University of Essen, Essen, Germany
| | - Karin Buiting
- Institute of Human Genetics, University of Essen, Essen, Germany
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