1
|
Cui F, Wulan T, Zhang Q, Zhang VW, Jiang Y. Identification of a novel KCNT2 variant in a family with developmental and epileptic encephalopathies: a case report and literature review. Front Genet 2024; 15:1371282. [PMID: 38510274 PMCID: PMC10951377 DOI: 10.3389/fgene.2024.1371282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2024] [Accepted: 02/20/2024] [Indexed: 03/22/2024] Open
Abstract
Background: Developmental and epileptic encephalopathies (DEEs) are a group of heterogeneous neurodevelopmental diseases characterized mainly by developmental delay/intellectual disability and early-onset epilepsy. Researchers have identified variations in the KCNT2 gene (OMIM* 610044) as the cause of DEE type 57 (MIM# 617771). Case presentation: We report in this study a 46-year-old woman who presented with early-onset epilepsy, intellectual disability, hypertrichosis, coarse facial features, and short stature. Besides, there were four other affected individuals in her family history, including two elder brothers, a younger brother, and their mother. We collected blood samples from the proband, her two affected brothers, and her clinically normal daughter for genetic analysis. Clinical exome sequencing revealed a novel heterozygous variant in the KCNT2 gene (NM_198503: c.188G>A, p.Arg63His) in the proband and her two affected brothers, while her daughter did not carry this variant. Furthermore, we reviewed all 25 patients identified in the literature with KCNT2 variants and compared their phenotypes. Conclusion: Epilepsy and intellectual disability/developmental delay occur in almost all patients with KCNT2 variants. KCNT2-relevant DEEs partially overlap with the clinical phenotypes of KATP channel diseases, particularly in hypertrichosis and distinctive coarse facial features.
Collapse
Affiliation(s)
- Fengji Cui
- Department of Molecular Genetics, Chifeng Maternity Hospital, Chifeng, China
| | - Tuoya Wulan
- Department of Reproduction, Chifeng Maternity Hospital, Chifeng, China
| | | | | | - Yuhua Jiang
- Department of Obstetrics, Chifeng Maternity Hospital, Chifeng, China
| |
Collapse
|
2
|
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] [What about the content of this article? (0)] [Affiliation(s)] [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.
Collapse
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.
| |
Collapse
|
3
|
Zhao Y, Hou Y, Zhao X, Liufu T, Yu M, Zhang W, Xie Z, Zhang VW, Yuan Y, Wang Z. The clinical, myopathological, and genetic analysis of 155 Chinese mitochondrial ophthalmoplegia patients with mitochondrial DNA single large deletions. Mol Genet Genomic Med 2024; 12:e2328. [PMID: 38018320 PMCID: PMC10767604 DOI: 10.1002/mgg3.2328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 10/20/2023] [Accepted: 11/14/2023] [Indexed: 11/30/2023] Open
Abstract
BACKGROUND Progressive external ophthalmoplegia (PEO) is a common subtype of mitochondrial encephalomyopathy. OBJECTIVE The study aimed to investigate the relationship between mitochondrial DNA (mtDNA) abnormalities, muscle pathology, and clinical manifestations in Chinese patients with single large-scale mtDNA deletion presenting with PEO. METHODS This is a retrospective single-center study. Patients with PEO who had a single large deletion in mitochondrial DNA were included in this study. The associations were analyzed between mtDNA deletion patterns, myopathological changes, and clinical characteristics. RESULTS In total, 155 patients with mitochondrial PEO carrying single large-scale mtDNA mutations were enrolled, including 137 chronic progressive external ophthalmoplegia (CPEO) and 18 Kearns-Sayre syndrome (KSS) patients. The onset ages were 9.61 ± 4.12 in KSS and 20.15 ± 9.06 in CPEO. The mtDNA deletions ranged from 2225 bp to 9131 bp, with m.8470_13446del being the most common. The KSS group showed longer deletions than the CPEO group (p = 0.004). Additionally, a higher number of deleted genes encoding respiratory chain complex subunits (p = 0.001) and tRNA genes (p = 0.009) were also observed in the KSS group. A weak negative correlation between the mtDNA deletion size and ages of onset (p < 0.001, r = -0.369) was observed. The proportion of ragged red fibers, ragged blue fibers, and cytochrome c negative fibers did not correlate significantly with onset ages (p > 0.05). However, a higher percentage of abnormal muscle fibers corresponds to an increased prevalence of exercise intolerance, limb muscle weakness, dysphagia, and cerebellar ataxia. CONCLUSION We reported a large Chinese cohort consisting of mitochondrial PEO patients with single large-scale mtDNA deletions. Our results demonstrated that the length and locations of mtDNA deletions may influence onset ages and clinical phenotypes. The severity of muscle pathology could not only indicate diagnosis but also may be associated with clinical manifestations beyond the extraocular muscles.
Collapse
Affiliation(s)
- Yang Zhao
- Department of NeurologyPeking University First HospitalBeijingChina
- Beijing Key Laboratory of Neurovascular Disease DiscoveryBeijingChina
| | - Yue Hou
- Department of GeriatricsPeking University First HospitalBeijingChina
| | - Xutong Zhao
- Department of NeurologyPeking University First HospitalBeijingChina
- Beijing Key Laboratory of Neurovascular Disease DiscoveryBeijingChina
- Department of NeurologyBeijing Jishuitan HospitalBeijingChina
| | - Tongling Liufu
- Department of NeurologyPeking University First HospitalBeijingChina
- Beijing Key Laboratory of Neurovascular Disease DiscoveryBeijingChina
| | - Meng Yu
- Department of NeurologyPeking University First HospitalBeijingChina
- Beijing Key Laboratory of Neurovascular Disease DiscoveryBeijingChina
| | - Wei Zhang
- Department of NeurologyPeking University First HospitalBeijingChina
- Beijing Key Laboratory of Neurovascular Disease DiscoveryBeijingChina
| | - Zhiying Xie
- Department of NeurologyPeking University First HospitalBeijingChina
- Beijing Key Laboratory of Neurovascular Disease DiscoveryBeijingChina
| | | | - Yun Yuan
- Department of NeurologyPeking University First HospitalBeijingChina
- Beijing Key Laboratory of Neurovascular Disease DiscoveryBeijingChina
| | - Zhaoxia Wang
- Department of NeurologyPeking University First HospitalBeijingChina
- Beijing Key Laboratory of Neurovascular Disease DiscoveryBeijingChina
| |
Collapse
|
4
|
Tang S, You J, Liu L, Ouyang H, Jiang N, Duan J, Li C, Luo Y, Zhang W, Zhan M, Liu C, Lyu G, Zhang VW, Zhao H. Expanding the mutational spectrum of ZTTK syndrome: A de novo variant with global developmental delay and malnutrition in a Chinese patient. Mol Genet Genomic Med 2023; 11:e2188. [PMID: 37488749 PMCID: PMC10422072 DOI: 10.1002/mgg3.2188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Revised: 10/23/2022] [Accepted: 02/22/2023] [Indexed: 07/26/2023] Open
Abstract
BACKGROUND Zhu-Tokita-Takenouchi-Kim (ZTTK, OMIM 617140) syndrome is a severe multisystem developmental disorder characterized by intellectual disability, developmental delay, cortical malformations, epilepsy, visual problems, musculoskeletal abnormalities, and congenital malformations. ZTTK syndrome is caused by a heterozygous pathogenic variant of the SON gene (NM_138927) at chromosome 21q22.1. The purpose of this study was to investigate the pathogenesis of a 6-month-old Chinese child who exhibited global developmental delay, muscle weakness, malnutrition, weight loss, and strabismus, brain abnormality, immunological system abnormalities. METHODS The little girl was tested for medical exome sequencing (MES) and mtDNA sequencing in trio. And, the mutation was validated by Sanger sequencing. RESULTS A novel de novo frameshift variant, c.1845_1870del26 (p.G616Sfs*61), in the SON gene was found in the proband. CONCLUSION We described a 6-month-old Chinese child with global developmental delay caused by pathogenic de novo mutation c.1845_1870del26 (p.G616Sfs*61) in the SON. Apart from a founder mutation, we reviewed the phenotypic abnormalities and genotypes in 79 individuals. The data showed that global developmental delay is accompanied by other system disorders. Our findings expanded the mutational spectrum of ZTTK syndrome and provide genetic counseling of baby with global developmental delay.
Collapse
Affiliation(s)
- Shuo Tang
- Department of Digestive System DiseasesHunan Children's HospitalChangshaChina
| | - Jieyu You
- Department of Digestive System DiseasesHunan Children's HospitalChangshaChina
| | - Li Liu
- Department of Digestive System DiseasesHunan Children's HospitalChangshaChina
| | - Hongjuan Ouyang
- Department of Digestive System DiseasesHunan Children's HospitalChangshaChina
| | - Na Jiang
- Department of Digestive System DiseasesHunan Children's HospitalChangshaChina
| | - Jiaqi Duan
- Department of Digestive System DiseasesHunan Children's HospitalChangshaChina
| | - Canlin Li
- Department of Digestive System DiseasesHunan Children's HospitalChangshaChina
| | - Yanhong Luo
- Department of Digestive System DiseasesHunan Children's HospitalChangshaChina
| | - Wenting Zhang
- Department of Digestive System DiseasesHunan Children's HospitalChangshaChina
| | - Meizheng Zhan
- Department of Digestive System DiseasesHunan Children's HospitalChangshaChina
| | - Chenxi Liu
- Department of Digestive System DiseasesHunan Children's HospitalChangshaChina
| | | | | | - Hongmei Zhao
- Department of Digestive System DiseasesHunan Children's HospitalChangshaChina
| |
Collapse
|
5
|
Yu W, Zhang S, Yin B, Dong C, Zhang VW, Zhang C. Identification of TUBB8 Variants in 5 Primary Infertile Women with Multiple Phenotypes in Oocytes and Early Embryos. Reprod Sci 2023; 30:1376-1382. [PMID: 36197634 PMCID: PMC10159944 DOI: 10.1007/s43032-022-01079-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 09/02/2022] [Indexed: 10/10/2022]
Abstract
Tubulin beta 8 class VIII (TUBB8) is a β-tubulin isotype that is specifically expressed in human oocytes and early embryos. It has been identified as a disease-causing gene in primary female infertility by affecting oocyte maturation arrest. This study investigated the genetic cause of female infertility in five patients from four families. Five women with primary infertility were recruited. Medical-exome sequencing and Sanger sequencing were performed on the patients, and their family members to identify candidate genes that explained infertility. Additionally, the morphology of oocytes and zygotes from the patients and controls were assessed. We observed recurrent oocytes MI arrest, oocytes abnormal fertilization, uncleaved embryos, and embryo transfer failure in the patients. Heterozygous missense variants in TUBB8, c.538G > A (p.V180M), c.527C > G (p.S176W), c.124C > G (p.L42V), and c.628A > C (p.I210L), were verified in four unrelated families. This study expanded the mutational spectrum of TUBB8 by identifying three novel heterozygous missense variants. Screening for TUBB8 mutation demonstrated the diagnostic utility of female infertility.
Collapse
Affiliation(s)
- Wenzhu Yu
- Department of Reproductive Medicine Center, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, and Henan Provincial People's Hospital of Henan University, Zhengzhou, Henan, China
- Henan Joint International Research Laboratory of Reproductive Bioengineering, Zhengzhou, Henan, China
| | - Shaodi Zhang
- Department of Reproductive Medicine Center, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, and Henan Provincial People's Hospital of Henan University, Zhengzhou, Henan, China.
- Henan Joint International Research Laboratory of Reproductive Bioengineering, Zhengzhou, Henan, China.
| | - Baoli Yin
- Department of Reproductive Medicine Center, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, and Henan Provincial People's Hospital of Henan University, Zhengzhou, Henan, China
- Henan Joint International Research Laboratory of Reproductive Bioengineering, Zhengzhou, Henan, China
| | - Chang Dong
- AmCare Genomics Lab, Guangzhou, Guangdong, China
| | | | - Cuilian Zhang
- Department of Reproductive Medicine Center, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, and Henan Provincial People's Hospital of Henan University, Zhengzhou, Henan, China.
- Henan Joint International Research Laboratory of Reproductive Bioengineering, Zhengzhou, Henan, China.
| |
Collapse
|
6
|
Chen J, Lyu GZ, Jiang F, Zhang VW, Li DZ. Accurate Identification of Breakpoints in a Cryptic Reciprocal Translocation by Whole-Genome Sequencing. Cytogenet Genome Res 2023; 162:386-390. [PMID: 36893740 DOI: 10.1159/000528604] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2022] [Accepted: 12/06/2022] [Indexed: 03/11/2023] Open
Abstract
Chromosomal abnormalities are a common cause of spontaneous abortions, but conventional detection methods (karyotype, FISH, and chromosomal microarray [CMA]) have limitations, and many cryptic balanced chromosomal rearrangements are difficult to detect. We describe a couple who experienced a missed abortion, studied by CMA. CMA of the abortion tissue detected a 1.62-Mb duplication at 14q11.2 and a 5.09-Mb deletion at 21q11.2q21.1, while the couple seemed to have a normal karyotype. Combining the results of CMA, whole-genome sequencing (WGS) breakpoint analysis, Sanger sequencing, and FISH, we found that the father was a 46,XY,t(14;21)(q11.2;q21.1) balanced translocation carrier. Our results indicate that WGS is an efficient and accurate approach to map breakpoints of cryptic reciprocal balanced translocations undetectable by standard karyotype.
Collapse
Affiliation(s)
- Juan Chen
- Prenatal Diagnosis and Reproduction Department, Guangzhou Women and Children's Medical Center Affiliated to Guangzhou Medical University, Guangzhou, China
| | | | - Fan Jiang
- Prenatal Diagnosis and Reproduction Department, Guangzhou Women and Children's Medical Center Affiliated to Guangzhou Medical University, Guangzhou, China
| | | | - Dong-Zhi Li
- Prenatal Diagnosis and Reproduction Department, Guangzhou Women and Children's Medical Center Affiliated to Guangzhou Medical University, Guangzhou, China
| |
Collapse
|
7
|
Yongsheng Z, Chong S, Bingyou L, Jianian H, Haofeng C, Chongbo Z, Zhang VW, Jie L. Prevalence estimation of ATTRv in China based on genetic databases. Front Genet 2023; 14:1126836. [PMID: 37124609 PMCID: PMC10133693 DOI: 10.3389/fgene.2023.1126836] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Accepted: 04/04/2023] [Indexed: 05/02/2023] Open
Abstract
Introduction: Amyloid transthyretin (ATTR) is divided into either hereditary (ATTRv) or sporadic (ATTRwt) and ATTRv is a rare hereditary disease transmitted as an autosomal dominant manner. Its global prevalence is traditionally estimated as 5,000 to 10,000 persons. However, it may be underestimated and the exact prevalence of ATTRv in China mainland remains unknown. Methods: The Genome Aggregation database (gnomAD) database (containing 125,748 exomes) and two genomic sequencing databases--China Metabolic Analytics Project (ChinaMAP) (containing 10588 individuals) and Amcarelab gene database (containing 45392 exomes), were integrated to estimate the prevalence of ATTRv in the world and mainland Chinese populations. Pathogenic variants allele frequency and the prevalence of ATTRv was calculated. Results: Six variants, counting 470 alleles, were defined as pathogenic variants in gnomAD. The prevalence of ATTRv in the world population was 57.4/100,000. Two variants (2 allele counts) and 15 variants (34 individuals) were defined as pathogenic variants in the ChinaMAP database and the Amcarelab exome database, respectively. Thus, the estimated prevalence interval of ATTRv in mainland China was 18.9/100,000-74,9/100,000. Conclusion: The present study demonstrated that the previous prevalence was greatly underestimated using traditional methods. Therefore, raising awareness of the disease is essential for recognizing ATTRv in its early stage.
Collapse
Affiliation(s)
- Zheng Yongsheng
- Department of Neurology, Huashan Hospital Fudan University, Shanghai, China
| | - Sun Chong
- Department of Neurology, Huashan Hospital Fudan University, Shanghai, China
| | - Liu Bingyou
- Department of Neurology, Huashan Hospital Fudan University, Shanghai, China
| | - Hu Jianian
- Department of Neurology, Huashan Hospital Fudan University, Shanghai, China
| | - Chen Haofeng
- Department of Neurology, Huashan Hospital Fudan University, Shanghai, China
| | - Zhao Chongbo
- Department of Neurology, Huashan Hospital Fudan University, Shanghai, China
| | | | - Lin Jie
- Department of Neurology, Huashan Hospital Fudan University, Shanghai, China
- *Correspondence: Lin Jie,
| |
Collapse
|
8
|
Tong K, He W, He Y, Li X, Hu L, Hu H, Lu G, Lin G, Dong C, Zhang VW, Du J, Liu D. Clinical Utility of Medical Exome Sequencing: Expanded Carrier Screening for Patients Seeking Assisted Reproductive Technology in China. Front Genet 2022; 13:943058. [PMID: 36072675 PMCID: PMC9441495 DOI: 10.3389/fgene.2022.943058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 06/20/2022] [Indexed: 11/13/2022] Open
Abstract
Purpose: Expanded carrier screening (ECS) is an effective method to identify at-risk couples (ARCs) and avoid birth defects. This study aimed to reveal the carrier spectrum in the Chinese population and to delineate an expanded carrier gene panel suitable in China.Methods: Medical exome sequencing (MES), including 4,158 disease-causing genes, was offered to couples at two reproductive centers. It was initially used as a diagnostic yield for potential patients and then used for ECS. Clinical information and ECS results were retrospectively collected.Results: A total of 2,234 couples, representing 4,468 individuals, underwent MES. In total, 254 individuals showed genetic disease symptoms, and 56 of them were diagnosed with genetic diseases by MES. Overall, 94.5% of them were carriers of at least one disease-causing variant. The most prevalent genes were GJB2 for autosomal recessive disorders and G6PD for X-linked diseases. The ARC rate was 9.80%, and couples were inclined to undergo preimplantation genetic testing when diseases were classified as “profound” or “severe.”Conclusion: This study provided insight to establish a suitable ECS gene panel for the Chinese population. Disease severity significantly influenced reproductive decision-making. The results highlighted the importance of conducting ECS for couples before undergoing assisted reproductive technology.
Collapse
Affiliation(s)
- Keya Tong
- Center for Reproductive Medicine, Women and Children’s Hospital of Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Human Embryo Engineering, Women and Children’s Hospital of Chongqing Medical University, Chongqing, China
| | - Wenbin He
- National Engineering and Research Center of Human Stem Cells, Changsha, China
- School of Basic Medical Science, Institute of Reproductive and Stem Cell Engineering, Central South University, Changsha, China
- Genetics Centre, Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China
| | - Yao He
- Center for Reproductive Medicine, Women and Children’s Hospital of Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Human Embryo Engineering, Women and Children’s Hospital of Chongqing Medical University, Chongqing, China
- Chongqing Clinical Research Center for Reproductive Medicine, Women and Children’s Hospital of Chongqing Medical University, Chongqing, China
| | - Xiurong Li
- National Engineering and Research Center of Human Stem Cells, Changsha, China
| | - Liang Hu
- National Engineering and Research Center of Human Stem Cells, Changsha, China
| | - Hao Hu
- National Engineering and Research Center of Human Stem Cells, Changsha, China
| | - Guangxiu Lu
- National Engineering and Research Center of Human Stem Cells, Changsha, China
- School of Basic Medical Science, Institute of Reproductive and Stem Cell Engineering, Central South University, Changsha, China
- Genetics Centre, Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China
| | - Ge Lin
- National Engineering and Research Center of Human Stem Cells, Changsha, China
- School of Basic Medical Science, Institute of Reproductive and Stem Cell Engineering, Central South University, Changsha, China
- Genetics Centre, Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China
| | | | | | - Juan Du
- National Engineering and Research Center of Human Stem Cells, Changsha, China
- School of Basic Medical Science, Institute of Reproductive and Stem Cell Engineering, Central South University, Changsha, China
- Genetics Centre, Reproductive and Genetic Hospital of CITIC-Xiangya, Changsha, China
- *Correspondence: Juan Du, ; Dongyun Liu,
| | - Dongyun Liu
- Center for Reproductive Medicine, Women and Children’s Hospital of Chongqing Medical University, Chongqing, China
- Chongqing Key Laboratory of Human Embryo Engineering, Women and Children’s Hospital of Chongqing Medical University, Chongqing, China
- Chongqing Clinical Research Center for Reproductive Medicine, Women and Children’s Hospital of Chongqing Medical University, Chongqing, China
- *Correspondence: Juan Du, ; Dongyun Liu,
| |
Collapse
|
9
|
Wu X, Chen L, Lu W, He S, Li X, Sun L, Zhang L, Wang D, Zhang R, Liu Y, Sun Y, Feng Z, Wei Zhang V. Discovery of Novel Variants on the CHD7 Gene: A Case Series of CHARGE Syndrome. Front Genet 2022; 13:852429. [PMID: 35938004 PMCID: PMC9355507 DOI: 10.3389/fgene.2022.852429] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2022] [Accepted: 06/06/2022] [Indexed: 01/09/2023] Open
Abstract
Background: CHARGE syndrome (CS) is a single-gene genetic disorder with multiple organ malformations caused by a variant of the chromodomain helicase DNA-binding protein 7 (CHD7) gene on chromosome 8q12.1. In this study, we aimed to investigate new variants that have emerged in these cases compared with typical CS and the relationship between the genes and phenotypes. Methods: Patients with suspected genetic diseases were subjected to Whole Exome Sequencing (WES) at a genetics laboratory in Guangzhou. The average sequencing coverage depth was >200 ×, and 96% was >20 ×. The variant interpretation was manipulated according to the American College of Medical Genetics (ACMG) guidelines. Molecular data on databases for ClinVar and CHD7 were also collected and collated. We reviewed the currently described CHD7 variants and analyzed the genetic variation and phenotypic heterogeneity. Results: Data of 12 patients with CS from four hospitals in China were collected. According to gestational age, most of them (8/12) were near-term babies with a lower birth weight than their peers, averaging 2.62 kg. In this study, the most common phenotypes were respiratory tract malformations (11/12), heart malformations (10/12), and central nervous system malformations (9/12). Two fetuses were confirmed to have brain or heart abnormalities during prenatal testing, while 10/12 were found to have abnormalities during prenatal testing. The maximum Acute Physiology and Chronic Health Evaluation (APACHE II) score at admission was 19, and the average was 11.58. Five variants in the CHD7 gene c.7012C > T (p.Q2338*), c.7868delC (p.P2623Rfs*16), c.5405-3C > G, c.6936 + 2T > C, and c.8077-2A > G) were novel and were located in exons 33, 36, and introns 25, 32, and 37, respectively. There may be a positive correlation between exon location and phenotype. Conclusion: Five novel variants were discovered. These expanded the mutational spectrum of the CHD7 gene and the phenotype of CS. There may be a correlation between the new mutation sites and the phenotype, which has some reference value for the evaluation of mutation sites.
Collapse
Affiliation(s)
- Xiangtao Wu
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, China,Department of Neonatology, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China,Department of Pediatrics of First Affiliated Hospital of Xinxiang Medical University, Xinxiang, China
| | - Liang Chen
- Department of Neonatology, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Weihong Lu
- Department of Pediatrics of First Affiliated Hospital of Xinxiang Medical University, Xinxiang, China
| | - Shaoru He
- The Second School of Clinical Medicine, Southern Medical University, Guangzhou, China,Department of Neonatology, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China,*Correspondence: Shaoru He, ; Yumei Liu,
| | - Xiaowen Li
- Neonatal Diagnosis and Treatment Center, Children’s Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, China International Science and Technology Cooperation Base of Child Development and Critical Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | | | | | - Dejuan Wang
- Department of Urology, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Ruigui Zhang
- Department of Neonatology, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Yumei Liu
- Department of Neonatology, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China,*Correspondence: Shaoru He, ; Yumei Liu,
| | - Yunxia Sun
- Department of Neonatology, Guangdong Provincial People’s Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China
| | - Zhichun Feng
- Department of Neonatology, Faculty of Pediatrics, Chinese PLA General Hospital, BaYi Children’s Hospital, Seventh Medical Center of Chinese PLA General Hospital, Beijing, China
| | | |
Collapse
|
10
|
Chen F, Xie Z, Zhang VW, Chen C, Fan H, Zhang D, Jiang W, Wang C, Wu P. Case Report: Report of Two Cases of Interstitial Lung Disease Caused by Novel Compound Heterozygous Variants in the ABCA3 Gene. Front Genet 2022; 13:875015. [PMID: 35464853 PMCID: PMC9019779 DOI: 10.3389/fgene.2022.875015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Accepted: 03/16/2022] [Indexed: 11/13/2022] Open
Abstract
Interstitial lung disease (ILD) is a heterogeneous group of pulmonary disorders involving the lung interstitium and distal airways, also known as diffuse lung disease. The genetic defects resulting in alveolar surfactant protein dysfunction are a rare cause of ILD in pediatric patients. We report two unrelated pediatric patients with shortness of breath, dyspnea and hypoxemia, and the chest CT findings including patchy ground-glass opacity in both lung fields, suggestive of diffuse ILD. One patient was a full-term male infant who had shortness of breath a few hours after the birth, and then developed into severe respiratory distress syndrome (RDS). Whole exome sequencing revealed novel compound heterozygous variants in the ABCA3 gene (NM_001,089.3): paternally inherited c.4035+5G > A and c.668T > C (p.M223T), and maternally inherited c.1285+4A > C. The second patient was a 34-month-old boy with onset of chronic repeated cough and hypoxemia at 9 months of age. We unveiled novel compound heterozygous ABCA3 variants (c.704T > C, p.F235S; c.4037_4040del, p.T1346Nfs*15) in this patient. Surfactant protein dysfunction due to bi-allelic mutations in the ABCA3 gene was the cause of ILD in two patients. The novel mutations found in this study expanded the spectrum of known mutations in the ABCA3 gene.
Collapse
Affiliation(s)
- Fang Chen
- Respiratory Department of Guangzhou Women and Children's Medical Center, Guangzhou, China
| | - Zhiwei Xie
- Respiratory Department of Guangzhou Women and Children's Medical Center, Guangzhou, China
| | - Victor Wei Zhang
- Department of Human and Molecular Genetics, Baylor College of Medicine, Houston, TX, United States.,AmCare Genomics Lab, Guangzhou, China
| | - Chen Chen
- Respiratory Department of Guangzhou Women and Children's Medical Center, Guangzhou, China
| | - Huifeng Fan
- Respiratory Department of Guangzhou Women and Children's Medical Center, Guangzhou, China
| | - Dongwei Zhang
- Respiratory Department of Guangzhou Women and Children's Medical Center, Guangzhou, China
| | - Wenhui Jiang
- Respiratory Department of Guangzhou Women and Children's Medical Center, Guangzhou, China
| | | | - Peiqiong Wu
- Respiratory Department of Guangzhou Women and Children's Medical Center, Guangzhou, China
| |
Collapse
|
11
|
Yang H, Zhang VW, Ai L, Gan S, Wu L. Multisystem Mitochondrial Disease Associated With a Mare m.10000G>A Mitochondrial tRNAGly (MT-TG) Variant. Front Neurol 2022; 13:795060. [PMID: 35432167 PMCID: PMC9005803 DOI: 10.3389/fneur.2022.795060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2021] [Accepted: 02/15/2022] [Indexed: 12/01/2022] Open
Abstract
Background Mitochondrial diseases are clinically heterogeneous, can occur at any age, and can manifest with a wide range of clinical symptoms. They can involve any organ or tissue, characteristically involve multiple systems, typically affecting organs that are highly dependent on aerobic metabolism, and making a definitive molecular diagnosis of a mitochondrial disorder is challenging. Methods Clinical data of the proband and his family members were gathered in a retrospective study. Whole-exome sequencing and full-length sequencing of the mitochondrial genome that were performed on peripheral blood, urine, and oral mucosa cells were applied for genetic analysis. Results In this study, we reported a childhood-onset mitochondrial phenotype in a 13-year-old patient. Analysis of the next-generation sequencing data of the nuclear genome and the full-length sequencing of the mitochondrial genome revealed the rare m.10000G>A variant in MT-TG that was present at variable heteroplasmy levels across tissue types: 32.7% in the blood, 56.15% in urinary epithelial cells, and 27.3% in oral mucosa cells. No variant was found in the peripheral blood of his mother and sister. No pathogenic mutation of nDNA was found. Conclusion Our results added evidence that the de novo m.10000G>A variation in the highly conserved sequence of MT-TG appears to suggest a childhood-onset mitochondrial phenotype in the 13-year-old patient, thus broadening the genotypic interpretation of mitochondrial DNA-related diseases.
Collapse
Affiliation(s)
- Haiyan Yang
- Neurology Department, Hunan Children's Hospital, The School of Pediatrics, Hengyang Medical School, University of South China, Changsha, China
| | - Victor Wei Zhang
- Department of Human and Molecular Genetics, Baylor College of Medicine, Houston, TX, United States
| | - Liang Ai
- Neurology Department, Hunan Children's Hospital, The School of Pediatrics, Hengyang Medical School, University of South China, Changsha, China
| | - Siyi Gan
- Neurology Department, Hunan Children's Hospital, The School of Pediatrics, Hengyang Medical School, University of South China, Changsha, China
| | - Liwen Wu
- Neurology Department, Hunan Children's Hospital, The School of Pediatrics, Hengyang Medical School, University of South China, Changsha, China
- *Correspondence: Liwen Wu
| |
Collapse
|
12
|
Chen F, Guo S, Li X, Liu S, Wang L, Zhang VW, Xu H, Huang Z, Ying Y, Shu S. Case Report: Be Aware of “New” Features of Niemann–Pick Disease: Insights From Two Pediatric Cases. Front Genet 2022; 13:845246. [PMID: 35360843 PMCID: PMC8961870 DOI: 10.3389/fgene.2022.845246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Accepted: 02/15/2022] [Indexed: 11/14/2022] Open
Abstract
Niemann–Pick disease is a relatively common lysosomal storage disease. Cholestatic liver disease is a typical clinical phenotype of Niemann–Pick disease in infancy. The diagnosis is traditionally based on Niemann–Pick cells in bone marrow smears or liver biopsies. Treatment for cholestatic liver disease mainly includes ursodeoxycholic acid and liver protection drugs. Here, we reported two cases of Niemann–Pick disease type C, diagnosed by genetic analysis during early infancy. Besides cholestatic jaundice, the two patients also exhibited signs of immune system hyperactivity, such as elevated immunoglobulins or multiple autoantibodies, which might require the application of glucocorticoids. In addition, three novel missense variants of the NPC1 gene were identified. The findings suggest that immune activation should be considered as a “new” clinical phenotype of lysosomal storage diseases.
Collapse
Affiliation(s)
- Fan Chen
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shan Guo
- Department of Gastroenterology, Wuhan Children’s Hospital of Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xuesong Li
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Shengxuan Liu
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Li Wang
- AmCare Genomics Lab, Guangzhou, China
| | | | - Hui Xu
- Department of Pathology, School of Basic Medicine, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Zhihua Huang
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yanqin Ying
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- *Correspondence: Yanqin Ying, ; Sainan Shu,
| | - Sainan Shu
- Department of Pediatrics, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- *Correspondence: Yanqin Ying, ; Sainan Shu,
| |
Collapse
|
13
|
Zhao J, Lyu G, Ding C, Wang X, Li J, Zhang W, Yang X, Zhang VW. Expanding the mutational spectrum of Rahman syndrome: A rare disorder with severe intellectual disability and particular facial features in two Chinese patients. Mol Genet Genomic Med 2022; 10:e1825. [PMID: 35156329 PMCID: PMC8922969 DOI: 10.1002/mgg3.1825] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 09/20/2021] [Accepted: 09/21/2021] [Indexed: 11/28/2022] Open
Abstract
Background The study aimed to investigate the clinical and genetic features of Rahman syndrome caused by HIST1H1E gene mutations. Methods We retrospectively analyzed the clinical information and genetic testing results of a Rahman syndrome family in an outpatient clinic in August 2020 and summarized the clinical characteristics of the HIST1H1E gene mutations in conjunction with peer‐reviewed reports. Results A 4‐year‐old boy was diagnosed with severe developmental delay and with specific features (large head, full cheeks, high hairline, low‐set ear, sparse eyebrows, and short neck) similar to his mother (mild intellectual disability, high hairline, reduced hair, ptosis, sagging skin, and hyperkeratosis) and premature aging. Trio whole exome sequencing (WES) revealed a novel maternal c.368dup (p.G124Rfs*72) heterozygous mutation in the HIST1H1E gene. There have been only a few reported cases with mainly de novo mutations. Only six peer‐reviewed articles in English and one in Chinese have been published regarding this syndrome. From 48 children with Rahman syndrome, 21 were males and 27 were females encompassing 25 mutations in the HIST1H1E gene. All mutations located in C‐terminal tail were frameshift mutations leading to premature protein termination. Conclusion Rahman syndrome, caused by the HIST1H1E gene mutation, is a rare autosomal dominant disorder in which the patient has an unusual facial appearance with high hairline and full cheeks, and clinical manifestations of mild to severe intellectual disability, motor delay and speech delay. Genetic testing may assist in the diagnosis of these patients. This diagnosis will permit early speech rehabilitation to improve their quality of life.
Collapse
Affiliation(s)
- Jianbo Zhao
- Department of Neurology Beijing Children’s Hospital National Center for Children’s Health Capital Medical University Beijing China
| | | | - Changhong Ding
- Department of Neurology Beijing Children’s Hospital National Center for Children’s Health Capital Medical University Beijing China
| | - Xiaohui Wang
- Department of Neurology Beijing Children’s Hospital National Center for Children’s Health Capital Medical University Beijing China
| | - Jiuwei Li
- Department of Neurology Beijing Children’s Hospital National Center for Children’s Health Capital Medical University Beijing China
| | - Weihua Zhang
- Department of Neurology Beijing Children’s Hospital National Center for Children’s Health Capital Medical University Beijing China
| | - Xinying Yang
- Department of Neurology Beijing Children’s Hospital National Center for Children’s Health Capital Medical University Beijing China
| | | |
Collapse
|
14
|
Huang Q, Jiang C, Sun J, Xue J, Zhang VW. Case report: A novel mutation in TRPS1 identified in a Chinese family with tricho-rhino-phalangeal syndrome I: A therapeutic challenge. Front Pediatr 2022; 10:990230. [PMID: 36467473 PMCID: PMC9716017 DOI: 10.3389/fped.2022.990230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2022] [Accepted: 11/02/2022] [Indexed: 11/19/2022] Open
Abstract
Tricho-rhino-phalangeal syndrome (TRPS) is a rare autosomal dominant malformation caused by mutations involving the TRPS1 gene. Patients with TRPS exhibit distinctive craniofacial and skeletal abnormalities. This report presents three intra-familial cases with TRPS1 gene mutations that showed the characteristic features of TRPS. A 13-year-old boy was admitted to Department of Endocrinology for the evaluation of short stature. Physical examination revealed that the boy had thin sparse hair, pear-shaped nose, protruding ears, small jaw and brachydactyly. A survey of his family history indicated that the boy's sister and mother shared the same clinical features. Radiological techniques demonstrated a different degree of skeletal abnormalities in these siblings. Next-generation sequencing and quantitative PCR were performed and showed a novel deletion mutation in exons 3-5 in the three familial cases, confirming the diagnosis of TRPS I. The healthy father did not carry the deletion mutation. Currently, there was no specific therapy for TRPS I; however, genetic consultation may be useful for family planning.
Collapse
Affiliation(s)
- Qi Huang
- Department of Endocrinology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Cheng Jiang
- Emergency Center, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Jiazhong Sun
- Department of Endocrinology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Junli Xue
- Department of Endocrinology, The Second Clinical Medical College, Yangtze University, Jingzhou, China
| | - Victor Wei Zhang
- Department of Clinical Genetics, AmCare Genomics Lab, Guangzhou, China
| |
Collapse
|
15
|
Yuan D, Yan T, Luo S, Huang J, Tan J, Zhang J, Zhang VW, Lan Y, Hu T, Guo J, Huang M, Zeng D. Identification and Functional Characterization of a Novel Nonsense Variant in ARR3 in a Southern Chinese Family With High Myopia. Front Genet 2021; 12:765503. [PMID: 34966409 PMCID: PMC8710690 DOI: 10.3389/fgene.2021.765503] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2021] [Accepted: 11/10/2021] [Indexed: 01/28/2023] Open
Abstract
ARR3 has been associated with X-linked, female-limited, high myopia. However, using exome sequencing (ES), we identified the first high myopia case with hemizygous ARR3-related mutation in a male patient in a Southern Chinese family. This novel truncated mutation (ARR3: c.569C>G, p.S190*) co-segregated with the disease phenotype in affected family members and demonstrated that high myopia caused by ARR3 is not X-linked, female-limited, where a complicated X-linked inheritance pattern may exist. Thus, our case expanded the variant spectrum in ARR3 and provided additional information for genetic counseling, prenatal testing, and diagnosis. Moreover, we characterized the nonsense-mediated decay of the ARR3 mutant mRNA and discussed the possible underlying pathogenic mechanisms.
Collapse
Affiliation(s)
- Dejian Yuan
- Department of Medical Genetics, Liuzhou Municipal Maternity and Child Healthcare Hospital, Liuzhou, China.,Liuzhou Key Laboratory of Birth Defects Prevention and Control, Liuzhou Municipal Maternity and Child Healthcare Hospital, Liuzhou, China
| | - Tizhen Yan
- Department of Medical Genetics, Liuzhou Municipal Maternity and Child Healthcare Hospital, Liuzhou, China.,Liuzhou Key Laboratory of Birth Defects Prevention and Control, Liuzhou Municipal Maternity and Child Healthcare Hospital, Liuzhou, China
| | - Shiqiang Luo
- Department of Medical Genetics, Liuzhou Municipal Maternity and Child Healthcare Hospital, Liuzhou, China.,Liuzhou Key Laboratory of Birth Defects Prevention and Control, Liuzhou Municipal Maternity and Child Healthcare Hospital, Liuzhou, China
| | - Jun Huang
- Department of Medical Genetics, Liuzhou Municipal Maternity and Child Healthcare Hospital, Liuzhou, China.,Liuzhou Key Laboratory of Birth Defects Prevention and Control, Liuzhou Municipal Maternity and Child Healthcare Hospital, Liuzhou, China
| | - Jianqiang Tan
- Department of Medical Genetics, Liuzhou Municipal Maternity and Child Healthcare Hospital, Liuzhou, China.,Liuzhou Key Laboratory of Birth Defects Prevention and Control, Liuzhou Municipal Maternity and Child Healthcare Hospital, Liuzhou, China
| | - Jianping Zhang
- Department of Ophthalmology, Liuzhou Municipal Maternity and Child Healthcare Hospital, Liuzhou, China
| | - Victor Wei Zhang
- AmCare Genomics Laboratory, Guangzhou, China.,Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, United States
| | - Yueyuan Lan
- Department of Ophthalmology, Liuzhou Municipal Maternity and Child Healthcare Hospital, Liuzhou, China
| | - Taobo Hu
- Center of Breast Diseases, Peking University People's Hospital, Beijing, China
| | - Jing Guo
- Reproductive Medical Center, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Mingwei Huang
- Aegicare (Sheznzhen) Technology Co., Ltd., Shenzhen, China
| | - Dingyuan Zeng
- Department of Gynecology, Liuzhou Municipal Maternity and Child Healthcare Hospital, Liuzhou, China
| |
Collapse
|
16
|
Li X, Zheng Y, Li S, Nair U, Sun C, Zhao C, Lu J, Zhang VW, Maljevic S, Petrou S, Lin J. Kv3.1 channelopathy: a novel loss-of-function variant and the mechanistic basis of its clinical phenotypes. Ann Transl Med 2021; 9:1397. [PMID: 34733949 PMCID: PMC8506712 DOI: 10.21037/atm-21-1885] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Accepted: 08/11/2021] [Indexed: 11/26/2022]
Abstract
Background KCNC1 encodes Kv3.1, a subunit of the Kv3 voltage-gated potassium channels. It is predominantly expressed in inhibitory GABAergic interneurons and cerebellar neurons. Kv3.1 channelopathy has been linked to a variety of human diseases including epilepsy, developmental delay, and ataxia. Characterization of structural and functional disturbances of this channel, and its relationship to a heterogenous group of clinical phenotypes, is a current topic of research. We herein characterize the clinical phenotype as well as the functional and structural consequences of the novel KCNC1 p.R317S variant. We further set out to explore the mechanistic basis for the spectrum of KCNC1 related channelopathies. Methods Variant was identified via whole-exome sequencing and its functional impact was determined using two-electrode voltage clamp recordings in Xenopus laevis oocytes. Homolog modeling and in silico structural analysis were performed on the p.R317S variant and other KCNC1 related variants. Results We identified a novel loss-of-function KCNC1 variant c.949C>A (p.R317S) presenting with symptoms similar to myoclonic epilepsy and ataxia due to potassium channel (MEAK), but with distinct radiological features. Functional analysis in the Xenopus laevis oocyte’s expression system revealed that the current amplitudes were significantly decreased in the p.R317S variant compared to the wild type, indicating a dominant-negative effect. Atomic structural analysis of the KCNC1 related variants provided a possible mechanistic explanation for the heterogeneity in the clinical spectrum. Conclusions We have identified the p.R317S loss-of-function variant in the KCNC1 gene, expanded the spectrum of potassium channelopathy and provided mechanistic insights into KCNC1 related disorders.
Collapse
Affiliation(s)
- Xiaoyang Li
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai, China.,Department of Neurology, University of North Carolina, Chapel Hill, USA
| | - Yongsheng Zheng
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai, China
| | | | - Umesh Nair
- The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, Melbourne, Australia
| | - Chong Sun
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai, China
| | - Chongbo Zhao
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai, China
| | - Jiahong Lu
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai, China
| | | | - Snezana Maljevic
- The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, Melbourne, Australia
| | - Steven Petrou
- The Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, Melbourne, Australia
| | - Jie Lin
- Department of Neurology, Huashan Hospital, Fudan University, Shanghai, China
| |
Collapse
|
17
|
Ding FJ, Lyu GZ, Zhang VW, Jin H. Missense mutation in DYNC1H1 gene caused psychomotor developmental delay and muscle weakness: A case report. World J Clin Cases 2021; 9:9302-9309. [PMID: 34786417 PMCID: PMC8567516 DOI: 10.12998/wjcc.v9.i30.9302] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 07/09/2021] [Accepted: 08/06/2021] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND The DYNC1H1 gene encodes a part of the dynamic protein, and the protein mutations may further affect the growth and development of neurons, resulting in degeneration of anterior horn cells of the spinal cord, and a variety of clinical phenotypes finally resulting in axonal Charcot-Marie-Tooth disease type 20 (CMT20), mental retardation 13 (MRD13) and spinal muscular atrophy with lower extremity predominant 1 (SMA-LED). The incidence of the disease is low, and it is difficult to diagnose, especially in children. Here, we report a case of DYNC1H1 gene mutation and review the related literature to improve the pediatrician’s understanding of DYNC1H1 gene-related disease to make an early correct diagnosis and provide better services for children.
CASE SUMMARY A 4-mo-old Chinese female child with adducted thumbs, high arch feet, and epileptic seizure presented slow response, delayed development, and low limb muscle strength. Electroencephalogram showed abnormal waves, a large number of multifocal sharp waves, sharp slow waves, and multiple spasms with a series of attacks. High-throughput sequencing and Sanger sequencing identified a heterozygous mutation, c.5885G>A (p.R1962H), in the DYNC1H1 gene (NM_001376) of the proband, which was not identified in her parents. Combined with the clinical manifestations and pedigree of this family, this mutation is likely pathogenic based on the American Academy of Medical Genetics and Genomics guidelines. The child was followed when she was 1 year and 2 mo old. The magnetic resonance imaging result was consistent with the findings of white matter myelinated dysplasia and congenital giant gyrus. The extensive neurogenic damage to the extremities was considered, as the results of electromyography showed that the motor conduction velocity and sensory conduction of the nerves of the extremities were not abnormal, and the degree of fit of the children with severe contraction was poor. At present, the child is 80 cm in length and 9 kg in weight, with slender limbs and low muscle strength, and still does not raise her head. She cannot sit or speak. Speech, motor, and mental development was significantly delayed. There is still no effective treatment for this disease.
CONCLUSION We herein report a de novo variant of DYNC1H1 gene, c.5885G>A (p.R1962H), leading to overlapping phenotypes (seizure, general growth retardation, and muscle weakness) of CMT20, MRD13, and SMA-LED, but there is no effective treatment for such condition. Our case enriches the DYNC1H1 gene mutation spectrum and provides an important basis for clinical diagnosis and treatment and genetic counseling.
Collapse
Affiliation(s)
- Feng-Juan Ding
- Prenatal Diagnosis Center, Jinan Maternal and Child Health Hospital, Jinan 250001, Shandong Province, China
| | - Gui-Zhen Lyu
- AmCare Genomics lab (Guangzhou), Guangzhou 510300, Guangdong Province, China
| | - Victor Wei Zhang
- AmCare Genomics lab (Guangzhou), Guangzhou 510300, Guangdong Province, China
- Department of Human and Molecular Genetics, Baylor College of Medicine, Houston, TX 77001, United States
| | - Hua Jin
- Prenatal Diagnosis Center, Jinan Maternal and Child Health Hospital, Jinan 250001, Shandong Province, China
| |
Collapse
|
18
|
Ouyang X, Zhang Y, Zhang L, Luo J, Zhang T, Hu H, Liu L, Zhong L, Zeng S, Xu P, Bai Z, Wong LJ, Wang J, Wang C, Wang B, Zhang VW. Clinical Utility of Rapid Exome Sequencing Combined With Mitochondrial DNA Sequencing in Critically Ill Pediatric Patients With Suspected Genetic Disorders. Front Genet 2021; 12:725259. [PMID: 34490048 PMCID: PMC8416976 DOI: 10.3389/fgene.2021.725259] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 07/30/2021] [Indexed: 02/04/2023] Open
Abstract
Genetic disorders are a frequent cause of hospitalization, morbidity and mortality in pediatric patients, especially in the neonatal or pediatric intensive care unit (NICU/PICU). In recent years, rapid genome-wide sequencing (exome or whole genome sequencing) has been applied in the NICU/PICU. However, mtDNA sequencing is not routinely available in rapid genetic diagnosis programs, which may fail to diagnose mtDNA mutation-associated diseases. Herein, we explored the clinical utility of rapid exome sequencing combined with mtDNA sequencing in critically ill pediatric patients with suspected genetic disorders. Rapid clinical exome sequencing (CES) was performed as a first-tier test in 40 critically ill pediatric patients (aged from 6 days to 15 years) with suspected genetic conditions. Blood samples were also collected from the parents for trio analysis. Twenty-six patients presented with neuromuscular abnormalities or other systemic abnormalities, suggestive of suspected mitochondrial diseases or the necessity for a differential diagnosis of other diseases, underwent rapid mtDNA sequencing concurrently. A diagnosis was made in 18 patients (45.0%, 18/40); three cases with de novo autosomal dominant variants, ten cases with homozygous or compound heterozygous variants, three cases with hemizygous variants inherited from mother, three cases with heterozygous variants inherited from either parent, and one case with a mtDNA mutation. The 18 patients were diagnosed with metabolic (n = 7), immunodeficiency (n = 4), cardiovascular (n = 2), neuromuscular (n = 2) disorders, and others. Genetic testing reports were generated with a median time of 5 days (range, 3–9 days). Thirteen patients that were diagnosed had an available medical treatment and resulted in a positive outcome. We propose that rapid exome sequencing combined with mitochondrial DNA sequencing should be available to patients with suspected mitochondrial diseases or undefined clinical features necessary for making a differential diagnosis of other diseases.
Collapse
Affiliation(s)
- Xuejun Ouyang
- Department of Pediatrics, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Yu Zhang
- Department of Pediatrics, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Lijuan Zhang
- Department of Pediatrics, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Jixuan Luo
- Department of Pediatrics, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Ting Zhang
- Department of Gastroenterology, Shanghai Children's Hospital, Shanghai, China
| | - Hui Hu
- Department of Gastroenterology, Shanghai Children's Hospital, Shanghai, China
| | - Lin Liu
- Department of Vasculocardiology, Guangdong Provincial People's Hospital, Guangzhou, China
| | - Lieqiang Zhong
- Department of Vasculocardiology, Guangdong Provincial People's Hospital, Guangzhou, China
| | - Shaoying Zeng
- Department of Vasculocardiology, Guangdong Provincial People's Hospital, Guangzhou, China
| | - Pingyi Xu
- Department of Neurology, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Zhenjiang Bai
- Department of Critical Care Medicine, Children's Hospital of Soochow University, Suzhou, China
| | - Lee-Jun Wong
- Department of Human and Molecular Genetics, Baylor College of Medicine, Houston, TX, United States
| | - Jing Wang
- Department of Human and Molecular Genetics, Baylor College of Medicine, Houston, TX, United States.,AmCare Genomics Lab, Guangzhou, China
| | | | - Bin Wang
- Department of Pediatrics, Zhujiang Hospital, Southern Medical University, Guangzhou, China
| | - Victor Wei Zhang
- Department of Human and Molecular Genetics, Baylor College of Medicine, Houston, TX, United States.,AmCare Genomics Lab, Guangzhou, China
| |
Collapse
|
19
|
He Y, Xie RG, Lou JW, Li YW, Wang CL, Zhang VW, Li DZ. Exome-based preconception carrier testing for consanguineous couples in China. Prenat Diagn 2021; 41:1425-1429. [PMID: 34486758 DOI: 10.1002/pd.6018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Revised: 05/17/2021] [Accepted: 07/03/2021] [Indexed: 11/07/2022]
Abstract
OBJECTIVE To evaluate the utility of clinical exome sequencing (ES)-based carrier screening in Chinese consanguineous couples. METHODS Consanguineous couples were screened for autosomal recessive (AR) disorders using the clinical ES of 5000 genes associated with human diseases. RESULTS We recruited 14 couples who elected to have sequencing. One couple was related as first cousins and 13 as second cousins. Both partners carrying the same pathogenic variant were detected in four couples. One couple was found in which one partner carried a splice variant, and the other had a missence variant of the same gene. These five couples were identified as being at risk of having a child affected by an AR disorder. CONCLUSION Our study demonstrates that ES-based preconception screening yields a clinical value for Chinese consanguineous couples. It enables to detect at-risk couples for rare AR diseases.
Collapse
Affiliation(s)
- Yi He
- Prenatal Diagnosis Unit, Dongguan Women and Children Healthcare Hospital, Dongguan, Guangdong, China
| | - Run-Gui Xie
- Prenatal Diagnosis Unit, Dongguan Women and Children Healthcare Hospital, Dongguan, Guangdong, China
| | - Ji-Wu Lou
- Prenatal Diagnosis Unit, Dongguan Women and Children Healthcare Hospital, Dongguan, Guangdong, China
| | - Yan-Wei Li
- Amcare Genomic Laboratory, Guangzhou, Guangdong, China
| | - Chun-Li Wang
- Amcare Genomic Laboratory, Guangzhou, Guangdong, China
| | | | - Dong-Zhi Li
- Prenatal Diagnostic Center, Guangzhou Women and Children's Medical Center, Guangzhou Medical University, Guangzhou, Guangdong, China
| |
Collapse
|
20
|
Xie Y, Chen F, Jia L, Chen R, Zhang VW, Zhong X, Wang D. Mesenchymal stem cells from different sources show distinct therapeutic effects in hyperoxia-induced bronchopulmonary dysplasia in rats. J Cell Mol Med 2021; 25:8558-8566. [PMID: 34322990 PMCID: PMC8419191 DOI: 10.1111/jcmm.16817] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Revised: 06/28/2021] [Accepted: 07/13/2021] [Indexed: 12/23/2022] Open
Abstract
Mesenchymal stem cells (MSCs) have been shown as an effective medicinal means to treat bronchopulmonary dysplasia (BPD). The widely used MSCs were from Wharton's jelly of umbilical cord (UC-MSCs) and bone marrow (BM-MSCs). Amniotic fluid MSCs (AF-MSCs) may be produced before an individual is born to treat foetal diseases by autoplastic transplantation. We evaluated intratracheal (IT) MSCs as an approach to treat an hyperoxia-induced BPD animal model and compared the therapeutic effects between AF-, UC- and BM-MSCs. A BPD animal model was generated by exposing newborn rats to 95% O2 . The continued stress lasted 21 days, and the treatment of IT MSCs was conducted for 4 days. The therapeutic effects were analysed, including lung histology, level of inflammatory cytokines, cell death ratio and state of angiogenesis, by sacrificing the experimental animal at day 21. The lasting hyperoxia stress induced BPD similar to the biological phenotype. The treatment of IT MSCs was safe without deaths and normal organ histopathology. Specifically, the treatment was effective by inhibiting the alveolar dilatation, reducing inflammatory cytokines, inducing angiogenesis and lowering the cell death ratio. AF-MSCs had better therapeutic effects compared with UC-MSCs in relieving the pulmonary alveoli histological changes and promoting neovascularization, and UC-MSCs had the best immunosuppressive effect in plasma and lung lysis compared with AF-MSCs and BM-MSCs. This study demonstrated the therapeutic effects of AF-, UC- and BM-MSCs in BPD model. Superior treatment effect was provided by antenatal MSCs compared to BM-MSC in a statistical comparison.
Collapse
Affiliation(s)
- 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
| | - Fei Chen
- 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
| | - Lei Jia
- Reproductive Medicine Research Center, Sixth Affiliated Hospital of Sun Yat-Sen University, Guangzhou, China
| | - Rui Chen
- 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
| | | | - Xinqi Zhong
- Key Laboratory of Reproduction and Genetics of Guangdong Higher Education Institutes, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.,Department of Pediatrics, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Ding Wang
- 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
| |
Collapse
|
21
|
Yan HM, Liu ZM, Cao B, Zhang VW, He YD, Jia ZJ, Xi H, Liu J, Fang F, Wang H. Novel Mutations in the GTPBP3 Gene for Mitochondrial Disease and Characteristics of Related Phenotypic Spectrum: The First Three Cases From China. Front Genet 2021; 12:611226. [PMID: 34276756 PMCID: PMC8281222 DOI: 10.3389/fgene.2021.611226] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2020] [Accepted: 05/12/2021] [Indexed: 11/26/2022] Open
Abstract
Combined Oxidative Phosphorylation Deficiency 23 (COXPD23) caused by mutations in GTPBP3 gene is a rare mitochondrial disease, and this disorder identified from the Chinese population has not been described thus far. Here, we report a case series of three patients with COXPD23 caused by GTPBP3 mutations, from a severe to a mild phenotype. The main clinical features of these patients include lactic acidosis, myocardial damage, and neurologic symptoms. Whole genome sequencing and targeted panels of candidate human mitochondrial genome revealed that patient 1 was a compound heterozygote with novel mutations c.413C > T (p. A138V) and c.509_510del (p. E170Gfs∗42) in GTPBP3. Patient 2 was a compound heterozygote with novel mutations c.544G > T (p. G182X) and c.785A > C (p.Q262P), while patient 3 was a compound heterozygote with a previously reported mutation c.424G > A (p.E142K) and novel mutation c.785A > C (p.Q262P). In conclusion, we first describe three Chinese individuals with COXPD23, and discuss the genotype-phenotype correlations of GTPBP3 mutations. Our findings provide novel information in the diagnosis and genetic counseling of patients with mitochondrial disease.
Collapse
Affiliation(s)
- Hui-Ming Yan
- Department of Genetic Medicine, Hunan Provincial Maternal and Child Health Care Hospital, Changsha, China.,National Health Commission Key Laboratory of Birth Defect, Research and Prevention, Changsha, China.,Newborn Screening Center of Hunan Province, Changsha, China
| | - Zhi-Mei Liu
- Department of Neurology, National Center for Children's Health, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Bei Cao
- Department of Neonatology, Hunan Provincial Maternal and Child Health Care Hospital, Changsha, China
| | - Victor Wei Zhang
- Department of Human and Molecular Genetics, Baylor College of Medicine, Houston, TX, United States.,AmCare Genomics Lab, Guangzhou, China
| | - Yi-Duo He
- AmCare Genomics Lab, Guangzhou, China
| | - Zheng-Jun Jia
- Department of Genetic Medicine, Hunan Provincial Maternal and Child Health Care Hospital, Changsha, China.,National Health Commission Key Laboratory of Birth Defect, Research and Prevention, Changsha, China.,Newborn Screening Center of Hunan Province, Changsha, China
| | - Hui Xi
- Department of Genetic Medicine, Hunan Provincial Maternal and Child Health Care Hospital, Changsha, China.,National Health Commission Key Laboratory of Birth Defect, Research and Prevention, Changsha, China.,Newborn Screening Center of Hunan Province, Changsha, China
| | - Jing Liu
- Department of Genetic Medicine, Hunan Provincial Maternal and Child Health Care Hospital, Changsha, China.,National Health Commission Key Laboratory of Birth Defect, Research and Prevention, Changsha, China.,Newborn Screening Center of Hunan Province, Changsha, China
| | - Fang Fang
- Department of Neurology, National Center for Children's Health, Beijing Children's Hospital, Capital Medical University, Beijing, China
| | - Hua Wang
- Department of Genetic Medicine, Hunan Provincial Maternal and Child Health Care Hospital, Changsha, China.,National Health Commission Key Laboratory of Birth Defect, Research and Prevention, Changsha, China.,Newborn Screening Center of Hunan Province, Changsha, China
| |
Collapse
|
22
|
Li YT, Chen JS, Jian W, He YD, Li N, Xie YN, Wang J, Zhang VW, Huang WR, Jiang FM, Ye XQ, Chen DJ, Chen M. L1CAM mutations in three fetuses diagnosed by medical exome sequencing. Taiwan J Obstet Gynecol 2021; 59:451-455. [PMID: 32416898 DOI: 10.1016/j.tjog.2020.03.022] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/31/2020] [Indexed: 11/29/2022] Open
Abstract
OBJECTIVE The L1 cell adhesion molecule (L1CAM) gene, encodes the L1 cell adhesion molecule, is involved in the central nervous system development. Its mutations result in L1 syndrome which is associated with brain malformation and nervous developmental delay. CASE REPORT We presented three fetuses with hydrocephalus and agenesis of the corpus callosum detected by ultrasound, followed by medical exome sequencing (MES) test with L1CAM mutations: two known missense mutation c.551G > A (p. R184Q) and c.1354G > A (p. G452R), and a novel frameshift mutation c.1322delG which causes the early termination of translation (p. G441Afs∗72). By utilizing multiple computational analysis, all the variants were scored to be likely pathogenic. CONCLUSION Combined use of ultrasound and MES to identify the molecular etiology of fetal anomalies may contribute to expanding our knowledge of the clinical phenotype of L1 syndrome observed in the south Chinese population.
Collapse
Affiliation(s)
- Ying-Ting Li
- Department of Fetal Medicine and Prenatal Diagnosis, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, China; Obstetrics & Gynecology Institute of Guangzhou, Guangzhou, 510150, China; The Medical Centre for Critical Pregnant Women in Guangzhou, Guangzhou, 510150, China; Key Laboratory for Major Obstetric Diseases of Guangdong Province, Guangzhou, 510150, China
| | - Jing-Si Chen
- Department of Fetal Medicine and Prenatal Diagnosis, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, China; Obstetrics & Gynecology Institute of Guangzhou, Guangzhou, 510150, China; The Medical Centre for Critical Pregnant Women in Guangzhou, Guangzhou, 510150, China; Key Laboratory for Major Obstetric Diseases of Guangdong Province, Guangzhou, 510150, China
| | - Wei Jian
- Department of Fetal Medicine and Prenatal Diagnosis, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, China; Obstetrics & Gynecology Institute of Guangzhou, Guangzhou, 510150, China; The Medical Centre for Critical Pregnant Women in Guangzhou, Guangzhou, 510150, China; Key Laboratory for Major Obstetric Diseases of Guangdong Province, Guangzhou, 510150, China
| | - Yi-Duo He
- AmCare Genomics Lab, Guangzhou, 510300, China
| | - Nan Li
- Department of Fetal Medicine and Prenatal Diagnosis, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, China; Obstetrics & Gynecology Institute of Guangzhou, Guangzhou, 510150, China; The Medical Centre for Critical Pregnant Women in Guangzhou, Guangzhou, 510150, China; Key Laboratory for Major Obstetric Diseases of Guangdong Province, Guangzhou, 510150, China
| | - Yi-Nong Xie
- Department of Fetal Medicine and Prenatal Diagnosis, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, China; Obstetrics & Gynecology Institute of Guangzhou, Guangzhou, 510150, China; The Medical Centre for Critical Pregnant Women in Guangzhou, Guangzhou, 510150, China; Key Laboratory for Major Obstetric Diseases of Guangdong Province, Guangzhou, 510150, China
| | - Jing Wang
- AmCare Genomics Lab, Guangzhou, 510300, China
| | - Victor Wei Zhang
- AmCare Genomics Lab, Guangzhou, 510300, China; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Wei-Ran Huang
- Department of Fetal Medicine and Prenatal Diagnosis, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, China; Obstetrics & Gynecology Institute of Guangzhou, Guangzhou, 510150, China; The Medical Centre for Critical Pregnant Women in Guangzhou, Guangzhou, 510150, China; Key Laboratory for Major Obstetric Diseases of Guangdong Province, Guangzhou, 510150, China
| | - Fu-Man Jiang
- Guangzhou Jingke Medical Laboratory, Guangzhou, 510320, China
| | - Xiao-Qing Ye
- Department of Fetal Medicine and Prenatal Diagnosis, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, China; Obstetrics & Gynecology Institute of Guangzhou, Guangzhou, 510150, China; The Medical Centre for Critical Pregnant Women in Guangzhou, Guangzhou, 510150, China; Key Laboratory for Major Obstetric Diseases of Guangdong Province, Guangzhou, 510150, China
| | - Dun-Jin Chen
- Department of Fetal Medicine and Prenatal Diagnosis, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, China; Obstetrics & Gynecology Institute of Guangzhou, Guangzhou, 510150, China; The Medical Centre for Critical Pregnant Women in Guangzhou, Guangzhou, 510150, China; Key Laboratory for Major Obstetric Diseases of Guangdong Province, Guangzhou, 510150, China
| | - Min Chen
- Department of Fetal Medicine and Prenatal Diagnosis, The Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, China; Obstetrics & Gynecology Institute of Guangzhou, Guangzhou, 510150, China; The Medical Centre for Critical Pregnant Women in Guangzhou, Guangzhou, 510150, China; Key Laboratory for Major Obstetric Diseases of Guangdong Province, Guangzhou, 510150, China.
| |
Collapse
|
23
|
Gong K, Xia M, Wang Y, Wang N, Liu Y, Zhang VW, Cheng H, Chen Y. Autosomal dominant tubulointerstitial kidney disease genotype and phenotype correlation in a Chinese cohort. Sci Rep 2021; 11:3615. [PMID: 33574344 PMCID: PMC7878898 DOI: 10.1038/s41598-020-79331-w] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Accepted: 12/02/2020] [Indexed: 12/18/2022] Open
Abstract
Genes of UMOD, HNF1B, MUC1, REN and SEC61A1 were reported to be associated with autosomal dominant tubulointerstitial kidney disease (ADTKD). 48 probands and their family members (N = 27) were enrolled in this genetic screening study. A combination of methods was employed for comprehensive molecular analysis of both copy number variations (CNVs) and single nucleotide variants (SNVs). 35 probands were followed for years. The phenotype-genotype and genotype-outcome correlation were inferred from these datasets. In this cohort, 18 probands were diagnosed with ADTKD, according to Kidney Disease: Improving Global Outcomes (KDIGO) guideline. Moreover, 11 probands were diagnosed with ADTKD-UMOD, one with ADTKD-REN and one with ADTKD-HNF1B, based on molecularly confirmed pathogenic variants. The 11 UMOD variants were mainly located in codons 28 to 289 and half of the variants were found to change the cysteine amino acid. According to the follow-up data, suspected ADTKD individuals had a better prognosis compared to ADTKD individuals (p = 0.029). Individuals with a cysteine substitution in the UMOD gene appeared to have a better prognosis than individuals with other amino acid substitutions (p = 0.015).
Collapse
Affiliation(s)
- Kunjing Gong
- Renal Division, Department of Medicine, Peking University First Hospital, Beijing, 100034, China.,Institute of Nephrology, Peking University, Beijing, 100034, China.,Key Laboratory of Renal Disease, Ministry of Health of China, Beijing, 100034, China.,Key Laboratory of Chronic Kidney Disease Prevention and Treatment, Ministry of Education, Beijing, 100034, China
| | - Min Xia
- Renal Division, Department of Medicine, Peking University First Hospital, Beijing, 100034, China.,Institute of Nephrology, Peking University, Beijing, 100034, China.,Key Laboratory of Renal Disease, Ministry of Health of China, Beijing, 100034, China.,Key Laboratory of Chronic Kidney Disease Prevention and Treatment, Ministry of Education, Beijing, 100034, China
| | - Yaqin Wang
- Renal Division, Department of Medicine, Peking University First Hospital, Beijing, 100034, China.,Institute of Nephrology, Peking University, Beijing, 100034, China.,Key Laboratory of Renal Disease, Ministry of Health of China, Beijing, 100034, China.,Key Laboratory of Chronic Kidney Disease Prevention and Treatment, Ministry of Education, Beijing, 100034, China
| | - Na Wang
- Renal Division, Department of Medicine, Peking University First Hospital, Beijing, 100034, China.,Institute of Nephrology, Peking University, Beijing, 100034, China.,Key Laboratory of Renal Disease, Ministry of Health of China, Beijing, 100034, China.,Key Laboratory of Chronic Kidney Disease Prevention and Treatment, Ministry of Education, Beijing, 100034, China
| | - Ying Liu
- Renal Division, Department of Medicine, Peking University First Hospital, Beijing, 100034, China.,Institute of Nephrology, Peking University, Beijing, 100034, China.,Key Laboratory of Renal Disease, Ministry of Health of China, Beijing, 100034, China.,Key Laboratory of Chronic Kidney Disease Prevention and Treatment, Ministry of Education, Beijing, 100034, China
| | - Victor Wei Zhang
- AmCare Genomics Laboratory, Guangzhou, China.,Baylor College of Medicine Department of Human and Molecular Genetics, Houston, USA
| | - Hong Cheng
- Division of Nephrology, Beijing AnZhen Hospital, Capital Medical University, Beijing, 100029, China
| | - Yuqing Chen
- Renal Division, Department of Medicine, Peking University First Hospital, Beijing, 100034, China. .,Institute of Nephrology, Peking University, Beijing, 100034, China. .,Key Laboratory of Renal Disease, Ministry of Health of China, Beijing, 100034, China. .,Key Laboratory of Chronic Kidney Disease Prevention and Treatment, Ministry of Education, Beijing, 100034, China.
| |
Collapse
|
24
|
Jiang F, Lyu GZ, Zhang VW, Li DZ. Identification of thalassemia gene cluster deletion by long-read whole-genome sequencing (LR-WGS). Int J Lab Hematol 2021; 43:859-865. [PMID: 33400392 DOI: 10.1111/ijlh.13452] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Revised: 11/18/2020] [Accepted: 12/14/2020] [Indexed: 01/10/2023]
Abstract
INTRODUCTION At present, a variety of molecular detection methods are obtained to diagnose thalassemia accurately. Although exome sequencing or specific panels have been widely used in clinical diagnosis of genetic diseases, the positive rate is about 25%-30%. Because the detection range is limited to exons and splice sites, and the read length is usually 100-150 bp, there are limitations in the detection of globin gene clusters with pseudogenes. METHODS In this study, seven thalassemia patients were selected to perform whole-genome sequencing (WGS) with long read at 400 bp to make accurate detection for thalassemia deletions. And we used PCR and Sanger sequencing to confirm the gene deletions in the patients. RESULTS WGS analysis detected a rare 172 kb deletion on the α-globin gene cluster at chr16: 57 009-330 001, 19 kb deletion at chr16: 215 396-234 699, 11 kb deletion at chr16:220 861-231 981; and 27 kb deletion on the β-globin gene deletion at chr11: 5 222 878-5 250 288, 21.4 kb deletion at chr11: 5 236 361-5 257 771, 78.9 kb deletion at chr11: 5 191 121-5 270 050. All the seven patients carried heterozygous deletions, including three in α-gene cluster, three in β-gene cluster, and one in both globin clusters. CONCLUSION Our results indicate that long-read WGS will be beneficial to the diagnosis of genetic diseases with pseudogenes or highly duplicated sequences and will enable clinical geneticists to inform high-risk couples and provide prenatal diagnosis.
Collapse
Affiliation(s)
- Fan Jiang
- Prenatal Diagnostic Center, Guangzhou Women and Children's Medical Center Affiliated to Guangzhou Medical University, Guangzhou, China
| | | | | | - Dong-Zhi Li
- Prenatal Diagnostic Center, Guangzhou Women and Children's Medical Center Affiliated to Guangzhou Medical University, Guangzhou, China
| |
Collapse
|
25
|
Liu Z, Shimura M, Zhang L, Zhang W, Wang J, Ogawa-Tominaga M, Wang J, Wang X, Lv J, Shi W, Zhang VW, Murayama K, Fang F. Whole exome sequencing identifies a novel homozygous MECR mutation in a Chinese patient with childhood-onset dystonia and basal ganglia abnormalities, without optic atrophy. Mitochondrion 2021; 57:222-229. [PMID: 33401012 DOI: 10.1016/j.mito.2020.12.014] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2020] [Revised: 12/23/2020] [Accepted: 12/30/2020] [Indexed: 12/01/2022]
Abstract
Childhood-onset dystonia with optic atrophy and basal ganglia abnormalities is an extremely rare autosomal recessive mitochondrial disease caused by biallelic mutations in MECR. Using whole-exome sequencing, we identified a novel homozygous MECR mutation (c.910G > T, p.Asp304Tyr) in a Chinese patient with childhood-onset dystonia and basal ganglia abnormalities, without optic atrophy. With lipoic acid treatment, the disease progression was under control, and neither visual impairment nor optic atrophy was observed. To our knowledge, this is the first study about MECR-related mitochondrial disease in a Chinese patient and the first to report that supplementation with lipoic acid is a possible effective therapeutic strategy for this disease.
Collapse
Affiliation(s)
- Zhimei Liu
- Department of Neurology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 100045, China
| | - Masaru Shimura
- Center for Medical Genetics and Department of Metabolism, Chiba Children's Hospital, Chiba 2660007, Japan
| | - Li Zhang
- Center for Bioinformatics and Computational Biology, and the Institute of Biomedical Sciences, School of Life Sciences, East China Normal University, Shanghai 200241, China
| | - Weihua Zhang
- Department of Neurology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 100045, China
| | - Jianing Wang
- College of Life Sciences, Nankai University, Tianjin 300071, China
| | - Minako Ogawa-Tominaga
- Center for Medical Genetics and Department of Metabolism, Chiba Children's Hospital, Chiba 2660007, Japan
| | - Junling Wang
- Department of Neurology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 100045, China
| | - Xiaohui Wang
- Department of Neurology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 100045, China
| | - Junlan Lv
- Department of Neurology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 100045, China
| | - Wei Shi
- Department of Ophthalmology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 100045, China
| | | | - Kei Murayama
- Center for Medical Genetics and Department of Metabolism, Chiba Children's Hospital, Chiba 2660007, Japan.
| | - Fang Fang
- Department of Neurology, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 100045, China.
| |
Collapse
|
26
|
Wang B, Du Z, Shan G, Yan C, Zhang VW, Li Z. Case Report: Two Chinese Infants of Sengers Syndrome Caused by Mutations in AGK Gene. Front Pediatr 2021; 9:639687. [PMID: 34164355 PMCID: PMC8215120 DOI: 10.3389/fped.2021.639687] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 04/20/2021] [Indexed: 12/17/2022] Open
Abstract
Sengers syndrome (OMIM #212350) is a rare autosomal recessive disorder due to mutations in acylglycerol kinase (AGK) gene. We report two cases that were diagnosed clinically and confirmed genetically. Both infants had typical clinical features characterized by hypertrophic cardiomyopathy, bilateral cataracts, myopathy, and lactic acidosis, and heart failure was the most severe manifestation. Genetic testing of a boy revealed a homozygous pathogenic variant for Sengers syndrome in AGK (c.1131+2T>C) which was classified as likely pathogenic according to the ACMG guideline; besides, his skeletal muscle biopsy and transmission electron microscope presented obvious abnormity. One girl had compound heterozygous (c.409C>T and c.390G>A) variants of AGK gene that was identified in the proband and further Sanger sequencing indicated that the parents carried a single heterozygous mutation each. After the administration of "cocktail" therapy including coenzyme Q10, carnitine, and vitamin B complex, as well as ACEI, heart failure and myopathy of the boy were significantly improved and the condition was stable after 1-year follow-up, while the cardiomyopathy of the girl is not progressive but the plasma lactate acid increased significantly. We present the first report of two infants with Sengers syndrome diagnosed via exome sequencing in China.
Collapse
Affiliation(s)
- Benzhen Wang
- Qingdao Women and Children's Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China.,Heart Center, Qingdao Women and Children's Hospital, Affiliated to Qingdao University, Qingdao, China
| | - Zhanhui Du
- Heart Center, Qingdao Women and Children's Hospital, Affiliated to Qingdao University, Qingdao, China
| | - Guangsong Shan
- Heart Center, Qingdao Women and Children's Hospital, Affiliated to Qingdao University, Qingdao, China
| | - Chuanzhu Yan
- Department of Neurology, Qilu Hospital of Shandong University, Jinan, China
| | - Victor Wei Zhang
- Department of Human and Molecular Genetics, Baylor College of Medicine, Houston, TX, United States
| | - Zipu Li
- Heart Center, Qingdao Women and Children's Hospital, Affiliated to Qingdao University, Qingdao, China
| |
Collapse
|
27
|
Qi Q, Jiang Y, Zhou X, Meng H, Hao N, Chang J, Bai J, Wang C, Wang M, Guo J, Ouyang Y, Xu Z, Xiao M, Zhang VW, Liu J. Simultaneous Detection of CNVs and SNVs Improves the Diagnostic Yield of Fetuses with Ultrasound Anomalies and Normal Karyotypes. Genes (Basel) 2020; 11:genes11121397. [PMID: 33255631 PMCID: PMC7759943 DOI: 10.3390/genes11121397] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2020] [Revised: 11/09/2020] [Accepted: 11/16/2020] [Indexed: 12/17/2022] Open
Abstract
The routine assessment to determine the genetic etiology for fetal ultrasound anomalies follows a sequential approach, which usually takes about 6–8 weeks turnaround time (TAT). We evaluated the clinical utility of simultaneous detection of copy number variations (CNVs) and single nucleotide variants (SNVs)/small insertion-deletions (indels) in fetuses with a normal karyotype with ultrasound anomalies. We performed CNV detection by chromosomal microarray analysis (CMA) or low pass CNV-sequencing (CNV-seq), and in parallel SNVs/indels detection by trio-based clinical exome sequencing (CES) or whole exome sequencing (WES). Eight-three singleton pregnancies with a normal fetal karyotype were enrolled in this prospective observational study. Pathogenic or likely pathogenic variations were identified in 30 cases (CNVs in 3 cases, SNVs/indels in 27 cases), indicating an overall molecular diagnostic rate of 36.1% (30/83). Two cases had both a CNV of uncertain significance (VOUS) and likely pathogenic SNV, and one case carried both a VOUS CNV and an SNV. We demonstrated that simultaneous analysis of CNVs and SNVs/indels can improve the diagnostic yield of prenatal diagnosis with shortened reporting time, namely, 2–3 weeks. Due to the relatively long TAT for sequential procedure for prenatal genetic diagnosis, as well as recent sequencing technology advancements, it is clinically necessary to consider the simultaneous evaluation of CNVs and SNVs/indels to enhance the diagnostic yield and timely TAT, especially for cases in the late second trimester or third trimester.
Collapse
Affiliation(s)
- Qingwei Qi
- Department of Obstetrics and Gynecology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China; (Y.J.); (X.Z.); (N.H.); (J.L.)
- Correspondence: ; Tel.: +86-1851-066-6066
| | - Yulin Jiang
- Department of Obstetrics and Gynecology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China; (Y.J.); (X.Z.); (N.H.); (J.L.)
| | - Xiya Zhou
- Department of Obstetrics and Gynecology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China; (Y.J.); (X.Z.); (N.H.); (J.L.)
| | - Hua Meng
- Department of Ultrasound, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China; (H.M.); (Y.O.); (Z.X.); (M.X.)
| | - Na Hao
- Department of Obstetrics and Gynecology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China; (Y.J.); (X.Z.); (N.H.); (J.L.)
| | - Jiazhen Chang
- Department of Medical Research Center, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China;
| | - Junjie Bai
- Be Creative Lab Co., Ltd. Beijing 101111, China; (J.B.); (M.W.); (J.G.)
| | - Chunli Wang
- AmCare Genomics Lab, Guangzhou 510335, China; (C.W.); (V.W.Z.)
| | - Mingming Wang
- Be Creative Lab Co., Ltd. Beijing 101111, China; (J.B.); (M.W.); (J.G.)
| | - Jiangshan Guo
- Be Creative Lab Co., Ltd. Beijing 101111, China; (J.B.); (M.W.); (J.G.)
| | - Yunshu Ouyang
- Department of Ultrasound, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China; (H.M.); (Y.O.); (Z.X.); (M.X.)
| | - Zhonghui Xu
- Department of Ultrasound, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China; (H.M.); (Y.O.); (Z.X.); (M.X.)
| | - Mengsu Xiao
- Department of Ultrasound, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China; (H.M.); (Y.O.); (Z.X.); (M.X.)
| | | | - Juntao Liu
- Department of Obstetrics and Gynecology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China; (Y.J.); (X.Z.); (N.H.); (J.L.)
| |
Collapse
|
28
|
Zhen L, Guo J, Jiang F, Xu LL, Zhang VW, Li DZ. Prenatal phenotypic discordance in monozygotic twins due to a postzygotic TSC2 variant. Prenat Diagn 2020; 41:207-209. [PMID: 33074564 DOI: 10.1002/pd.5850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Revised: 10/02/2020] [Accepted: 10/17/2020] [Indexed: 11/07/2022]
Affiliation(s)
- Li Zhen
- Prenatal Diagnostic Center, Guangzhou Women and Children's Medical Center, Guangzhou, Guangdong, China
| | - Jie Guo
- AmCare Genomics Laboratory, Guangzhou, China
| | - Fan Jiang
- Prenatal Diagnostic Center, Guangzhou Women and Children's Medical Center, Guangzhou, Guangdong, China
| | - Li-Li Xu
- Prenatal Diagnostic Center, Guangzhou Women and Children's Medical Center, Guangzhou, Guangdong, China
| | | | - Dong-Zhi Li
- Prenatal Diagnostic Center, Guangzhou Women and Children's Medical Center, Guangzhou, Guangdong, China
| |
Collapse
|
29
|
Mai K, Chen X, Wang C, Wu S, Yang L, Huang Z, Zhang G, Zhang VW, Wang J, Chen D. B-lymphocyte deficiency and recurrent respiratory infections in a 6-month-old female infant with mosaic monosomy 7. Immunobiology 2020; 225:152005. [PMID: 32962823 DOI: 10.1016/j.imbio.2020.152005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Revised: 05/24/2020] [Accepted: 08/11/2020] [Indexed: 10/23/2022]
Abstract
Monosomy 7 is generally considered as an acquired cytogenetic abnormality within hematopoietic cells, and indicates an especially high risk of progression to bone marrow failure, myelodysplastic syndrome (MDS) or juvenile myelomonocytic leukemia (JMML). We report a case of a 6-month-old female infant with mosaic monosomy 7 who presented with clinical and laboratory evidences of immunodeficiency. The patient had suffered from recurrent respiratory infections since she was born. Peripheral blood lymphocyte subsets revealed an extremely low level of CD19+ B lymphocytes (0.3∼0.8%, normal range: 6.4∼22.6%) and a decreased CD4/CD8 ratio (0.67∼1.12, normal range: 1.4∼2.0). Decreased serum levels of IgG (1.53 g/L, normal range: 4.09∼7.03 g/L), IgA (0.10 g/L, normal range: 0.21∼0.47 g/L) and IgM (0.26 g/L, normal range: 0.33∼0.73 g/L) were detected, while complements were normal. Excepting transient neutropenia, routine blood tests were within normal limits. Clinical exome sequencing identified a de novo mosaic monosomy 7, while no pathogenic mutation associated with immunodeficiency was detected. However, peripheral blood cytogenetic analysis was failure to detect monosomy 7 due to the very few cell mitosis. Subsequent fluorescence in situ hybridization (FISH) identified a mosaic monosomy 7 in 58 cells within a total number of 100 cells, which was consistent with clinical exome sequencing. Therefore, the patient was diagnosed with primary immunodeficiency disease (PID) due to mosaic monosomy 7. Intravenous treatment with multiple antibiotic agents and infusion of gamma globulin could control the patient's respiratory infections effectively. A better understanding of PIDs will enable effective treatments and prevention of infections in these patients.
Collapse
Affiliation(s)
- Kailin Mai
- Department of Pediatrics, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Xiaowen Chen
- Department of Pediatrics, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Chunli Wang
- AmCare Genomics Lab (V.W.Z.), Guangzhou, China
| | - Shangzhi Wu
- Department of Pediatrics, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Liying Yang
- Department of Pediatrics, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - Zhanhang Huang
- Department of Pediatrics, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | | | - Victor Wei Zhang
- Department of Human and Molecular Genetics, Baylor College of Medicine, Houston, USA
| | - Jing Wang
- AmCare Genomics Lab (V.W.Z.), Guangzhou, China
| | - Dehui Chen
- Department of Pediatrics, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China.
| |
Collapse
|
30
|
Yuan H, Yang H, Peng L, Peng Y, Chen Z, Wan L, Wang C, Shi Y, Zhang VW, Tang B, Qiu R, Jiang H. Corrigendum to "Profiling of mitochondrial genomes in SCA3/MJD patients from mainland China" [Gene 738 (2020) 144487]. Gene 2020; 740:144607. [PMID: 32245638 DOI: 10.1016/j.gene.2020.144607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Hongyu Yuan
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Huihua Yang
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Linliu Peng
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yun Peng
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Zhao Chen
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Linlin Wan
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Chunrong Wang
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yuting Shi
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Victor Wei Zhang
- AmCare Genomics Laboratory, Guangzhou, China; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Beisha Tang
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China; National Clinical Research Center for Geriatric Diseases, Central South University, Changsha, Hunan, China; Key Laboratory of Hunan Province in Neurodegenerative Disorders, Central South University, Changsha, Hunan, China; Laboratory of Medical Genetics, Central South University, Changsha, Hunan, China
| | - Rong Qiu
- School of Computer Science and Engineering, Central South University, Changsha, China.
| | - Hong Jiang
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China; National Clinical Research Center for Geriatric Diseases, Central South University, Changsha, Hunan, China; Key Laboratory of Hunan Province in Neurodegenerative Disorders, Central South University, Changsha, Hunan, China; Laboratory of Medical Genetics, Central South University, Changsha, Hunan, China; Xinjiang Medical University, Urumchi, Xinjiang, China.
| |
Collapse
|
31
|
Chen M, Chen J, Wang C, Chen F, Xie Y, Li Y, Li N, Wang J, Zhang VW, Chen D. Clinical application of medical exome sequencing for prenatal diagnosis of fetal structural anomalies. Eur J Obstet Gynecol Reprod Biol 2020; 251:119-124. [PMID: 32502767 DOI: 10.1016/j.ejogrb.2020.04.033] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2020] [Revised: 04/13/2020] [Accepted: 04/15/2020] [Indexed: 01/25/2023]
Abstract
OBJECTIVE To evaluate the clinical application of medical exome sequencing (MES) for prenatal diagnosis of genetic diseases related to fetal structural anomalies detected by prenatal ultrasound examination. STUDY DESIGN A total of 105 fetuses with structural anomalies were negative results in both Quantitative fluorescent polymerase chain reaction (QF-PCR) and chromosomal microarray analysis (CMA). Then trio-based MES was further used for identifying the potential monogenic diseases in these fetuses. Coding regions and known pathogenic non-coding regions of over 4000 disease-related genes were interrogated, and variants were classified following the guidelines of American College of Medical Genetics (ACMG). RESULTS The 105 fetuses with structural anomalies were categorized into 12 phenotypic groups. A definitive diagnosis was achieved in 19% (20/105) of the cases, with the identification of 21 pathogenic or likely pathogenic variants in 14 genes. The proportion of patients with diagnostic genetic variants varied between the phenotypic groups, with the highest diagnostic yield in the cardiovascular abnormalities (44%), followed by the skeletal and limb abnormalities (38%) and brain structural abnormalities (25%). In addition, 12 fetuses were detected variants of unknown significance (VOUS), while the relevance of phenotypes and variants would further evaluated. CONCLUSION MES can identify the underlying genetic cause in fetal structural anomalies. It can further assist the management of pregnancy and genetic counseling. It was demonstrated the importance of translating prenatal MES into clinical practice.
Collapse
Affiliation(s)
- Min Chen
- Department of Fetal Medicine and Prenatal Diagnosis, the Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, China; Obstetrics & Gynecology Institute of Guangzhou, Guangzhou, 510150, China; The Medical Centre for Critical Pregnant Women in Guangzhou, Guangzhou, 510150, China; Key Laboratory for Major Obstetric Diseases of Guangdong Province, Guangzhou, 510150, China; Key Laboratory for Reproduction and Genetics of Guangdong Higher Education Institutes.
| | - Jingsi Chen
- Department of Fetal Medicine and Prenatal Diagnosis, the Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, China; Obstetrics & Gynecology Institute of Guangzhou, Guangzhou, 510150, China; The Medical Centre for Critical Pregnant Women in Guangzhou, Guangzhou, 510150, China; Key Laboratory for Major Obstetric Diseases of Guangdong Province, Guangzhou, 510150, China; Key Laboratory for Reproduction and Genetics of Guangdong Higher Education Institutes
| | - Chunli Wang
- AmCare Genomics Laboratory, Guangzhou, 510300, Guangdong, China
| | - Fei Chen
- Department of Fetal Medicine and Prenatal Diagnosis, the Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, China; Obstetrics & Gynecology Institute of Guangzhou, Guangzhou, 510150, China; The Medical Centre for Critical Pregnant Women in Guangzhou, Guangzhou, 510150, China; Key Laboratory for Major Obstetric Diseases of Guangdong Province, Guangzhou, 510150, China; Key Laboratory for Reproduction and Genetics of Guangdong Higher Education Institutes
| | - Yinong Xie
- Department of Fetal Medicine and Prenatal Diagnosis, the Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, China; Obstetrics & Gynecology Institute of Guangzhou, Guangzhou, 510150, China; The Medical Centre for Critical Pregnant Women in Guangzhou, Guangzhou, 510150, China; Key Laboratory for Major Obstetric Diseases of Guangdong Province, Guangzhou, 510150, China; Key Laboratory for Reproduction and Genetics of Guangdong Higher Education Institutes
| | - Yufan Li
- Department of Fetal Medicine and Prenatal Diagnosis, the Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, China; Obstetrics & Gynecology Institute of Guangzhou, Guangzhou, 510150, China; The Medical Centre for Critical Pregnant Women in Guangzhou, Guangzhou, 510150, China; Key Laboratory for Major Obstetric Diseases of Guangdong Province, Guangzhou, 510150, China; Key Laboratory for Reproduction and Genetics of Guangdong Higher Education Institutes
| | - Nan Li
- Department of Fetal Medicine and Prenatal Diagnosis, the Third Affiliated Hospital of Guangzhou Medical University, Guangzhou, 510150, China; Obstetrics & Gynecology Institute of Guangzhou, Guangzhou, 510150, China; The Medical Centre for Critical Pregnant Women in Guangzhou, Guangzhou, 510150, China; Key Laboratory for Major Obstetric Diseases of Guangdong Province, Guangzhou, 510150, China; Key Laboratory for Reproduction and Genetics of Guangdong Higher Education Institutes
| | - Jing Wang
- AmCare Genomics Laboratory, Guangzhou, 510300, Guangdong, China
| | - Victor Wei Zhang
- AmCare Genomics Laboratory, Guangzhou, 510300, Guangdong, China; Baylor College of Medicine, Department of Human and Molecular Genetics, Houston, USA
| | - Dunjin Chen
- Obstetrics & Gynecology Institute of Guangzhou, Guangzhou, 510150, China; The Medical Centre for Critical Pregnant Women in Guangzhou, Guangzhou, 510150, China; Key Laboratory for Major Obstetric Diseases of Guangdong Province, Guangzhou, 510150, China; Key Laboratory for Reproduction and Genetics of Guangdong Higher Education Institutes
| |
Collapse
|
32
|
Wong LJC, Chen T, Schmitt ES, Wang J, Zhang S, Landsverk M, Li F, Tang S, Wang Y, Zhang VW, Craigen WJ. Response to Bai et al. Genet Med 2020; 22:1420-1421. [PMID: 32418988 DOI: 10.1038/s41436-020-0805-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Accepted: 03/31/2020] [Indexed: 11/09/2022] Open
Affiliation(s)
- Lee-Jun C Wong
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA. .,Baylor Genetics Laboratory, Houston, TX, USA.
| | - Ting Chen
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,Department of Endocrinology, Genetics and Metabolism, Children's Hospital of Soochow University, Suzhou, China
| | - Eric S Schmitt
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,Baylor Genetics Laboratory, Houston, TX, USA
| | - Jing Wang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Shulin Zhang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,Department of Pathology and Laboratory Medicine, UKHealthCare, University of Kentucky, Lexington, USA
| | - Megan Landsverk
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,Global Laboratory Services/Diagnostics, Perkin Elmer, Waltham, MA, USA
| | - Fangyuan Li
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,Sema4, Branford, CT, USA
| | - Sha Tang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,WuXi NextCODE, Cambridge, MA, USA
| | - Yue Wang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,Baylor Genetics Laboratory, Houston, TX, USA
| | - Victor Wei Zhang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,AmCare Genomics Lab, Guangzhou, China
| | - William J Craigen
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,Baylor Genetics Laboratory, Houston, TX, USA
| |
Collapse
|
33
|
You C, Zeng W, Deng L, Lei Z, Gao X, Zhang VW, Wang Y. Identification and Clinical Analysis of the First Nonsense Mutation in the PSEN1 Gene in a Family With Acute Encephalopathy and Retinitis Pigmentosa. Front Neurol 2020; 11:319. [PMID: 32431660 PMCID: PMC7214681 DOI: 10.3389/fneur.2020.00319] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2020] [Accepted: 03/31/2020] [Indexed: 11/22/2022] Open
Abstract
In the present study, we investigated the genetic variation in a family with acute encephalopathy and retinitis pigmentosa. Nine of 25 people in this family underwent genetic testing. Three family members, namely, the proband and the proband's two sisters, showed symptoms resembling those of meningoencephalitis and simultaneously suffered from retinitis pigmentosa. Whole-exome sequencing and Sanger sequencing identified a heterozygous mutation, chr14: 73673106 c.881G>A (p.W294*), in the presenilin 1 (PSEN1) gene in these three family members, and the SWISS-MODEL server predicted the formation of a truncated protein. This mutation was not found in the asymptomatic family members. This mutation is a newly discovered nonsense mutation that results in a truncated protein. Although the current genetic evidences may indicate the likelihood of association, further investigations are needed to establish the genotype and phenotype relationship.
Collapse
Affiliation(s)
- Chunlin You
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China.,Department of Neurology, The University of Hong Kong-Shenzhen Hospital, Shenzhen, China
| | - Weike Zeng
- Department of Radiology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| | - Lingna Deng
- Scientific Research Center and Department of Orthopedic, The Seventh Affiliated Hospital, Sun Yat-sen University, Shenzhen, China
| | - Zhihao Lei
- Department of Neurology, Shenzhen Second People's Hospital, Shenzhen, China
| | - Xinyi Gao
- AmCare Genomics Laboratory, GuangZhou, China
| | - Victor Wei Zhang
- AmCare Genomics Laboratory, GuangZhou, China.,Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, United States
| | - Yidong Wang
- Department of Neurology, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China.,Guangdong Province Key Laboratory of Brain Function and Disease, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.,Guangdong Provincial Key Laboratory of Malignant Tumor Epigenetics and Gene Regulation, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, Guangzhou, China
| |
Collapse
|
34
|
Wong LJC, Chen T, Wang J, Tang S, Schmitt ES, Landsverk M, Li F, Wang Y, Zhang S, Zhang VW, Craigen WJ. Correction: Interpretation of mitochondrial tRNA variants. Genet Med 2020; 22:1130. [PMID: 32269312 DOI: 10.1038/s41436-020-0802-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Collapse
Affiliation(s)
- Lee-Jun C Wong
- Department of Molecular and Human Genetics, , Baylor College of Medicine, Houston, TX, USA. .,Baylor Genetics Laboratory, Houston, TX, USA.
| | - Ting Chen
- Department of Molecular and Human Genetics, , Baylor College of Medicine, Houston, TX, USA.,Department of Endocrinology, Genetics and Metabolism, Children's Hospital of Soochow University, Suzhou, China
| | - Jing Wang
- Department of Molecular and Human Genetics, , Baylor College of Medicine, Houston, TX, USA.,Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Sha Tang
- Department of Molecular and Human Genetics, , Baylor College of Medicine, Houston, TX, USA.,WuXi NextCODE, Cambridge, MA, USA
| | - Eric S Schmitt
- Department of Molecular and Human Genetics, , Baylor College of Medicine, Houston, TX, USA.,Baylor Genetics Laboratory, Houston, TX, USA
| | - Megan Landsverk
- Department of Molecular and Human Genetics, , Baylor College of Medicine, Houston, TX, USA.,Global Laboratory Services/Diagnostics, Perkin Elmer, Waltham, MA, USA
| | - Fangyuan Li
- Department of Molecular and Human Genetics, , Baylor College of Medicine, Houston, TX, USA.,Otogenetic Corporation, Atlanta, GA, USA
| | - Yue Wang
- Department of Molecular and Human Genetics, , Baylor College of Medicine, Houston, TX, USA.,Baylor Genetics Laboratory, Houston, TX, USA
| | - Shulin Zhang
- Department of Molecular and Human Genetics, , Baylor College of Medicine, Houston, TX, USA.,Department of Pathology and Laboratory Medicine, UKHealthCare, University of Kentucky, Lexington, KY, USA
| | - Victor Wei Zhang
- Department of Molecular and Human Genetics, , Baylor College of Medicine, Houston, TX, USA.,AmCare Genomics Lab, Guangzhou, China
| | - William J Craigen
- Department of Molecular and Human Genetics, , Baylor College of Medicine, Houston, TX, USA.,Baylor Genetics Laboratory, Houston, TX, USA
| |
Collapse
|
35
|
Wong LJC, Chen T, Wang J, Tang S, Schmitt ES, Landsverk M, Li F, Wang Y, Zhang S, Zhang VW, Craigen WJ. Correction: Interpretation of mitochondrial tRNA variants. Genet Med 2020; 22:979. [PMID: 32132679 DOI: 10.1038/s41436-020-0770-0] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
An amendment to this paper has been published and can be accessed via a link at the top of the paper.
Collapse
Affiliation(s)
- Lee-Jun C Wong
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA. .,Baylor Genetics Laboratory, Houston, TX, USA.
| | - Ting Chen
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,Department of Endocrinology, Genetics and Metabolism, Children's Hospital of Soochow University, Suzhou, China
| | - Jing Wang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Sha Tang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,WuXi NextCODE, Cambridge, MA, USA
| | - Eric S Schmitt
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,Baylor Genetics Laboratory, Houston, TX, USA
| | - Megan Landsverk
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,Global Laboratory Services/Diagnostics, Perkin Elmer, Waltham, MA, USA
| | - Fangyuan Li
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,Otogenetic Corporation, Atlanta, GA, USA
| | - Yue Wang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,Baylor Genetics Laboratory, Houston, TX, USA
| | - Shulin Zhang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,Department of Pathology and Laboratory Medicine, UKHealthCare, University of Kentucky, Lexington, KY, USA
| | - Victor Wei Zhang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,AmCare Genomics Lab, Guangzhou, China
| | - William J Craigen
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA.,Baylor Genetics Laboratory, Houston, TX, USA
| |
Collapse
|
36
|
Yuan H, Yang H, Peng L, Peng Y, Chen Z, Wan L, Wang C, Shi Y, Zhang VW, Tang B, Qiu R, Jiang H. Profiling of mitochondrial genomes in SCA3/MJD patients from mainland China. Gene 2020; 738:144487. [PMID: 32087274 DOI: 10.1016/j.gene.2020.144487] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 02/15/2020] [Accepted: 02/19/2020] [Indexed: 02/08/2023]
Abstract
Spinocerebellar ataxia type 3, also known as Machado-Joseph disease (SCA3/MJD), is the most common type of autosomal dominant cerebellar ataxias. Few studies focused on the changes of the whole mitochondrial genomes of SCA3/MJD patients and its relationship with the pathogenesis of SCA3/MJD. We adapted one-step long-range PCR to amplify the entire mitochondrial DNA (mtDNA) followed by next-generation sequencing technology to investigate the information of whole mitochondrial genomes in 38 SCA3/MJD patients and 31 healthy controls from mainland China. Compared to the healthy control group, the mitochondrial variations in SCA3/MJD patients were more concentrated in the tRNA-transcribed genes which were further found to be potentially associated with the pathogenesis of SCA3/MJD by SKAT-O analysis. However, owning variations in tRNA-transcribed genes could not affect the age of onset (AO) of SCA3/MJD patients. We also noticed that the variant loads greater than 90% took up more in SCA3/MJD patients than in controls. Moreover, from our preliminary study, compared to the patients whose ages of onset were elder than 20, the mitochondrial genomes showed no difference in those AO less than 20. This is the first study to demonstrate the feasibility of using the next-generation sequencing technology for mtDNA variant analysis of SCA3/MJD patients from mainland China. And this research enriches the genetic information of SCA3/MJD and provides a direction for further investigations about the mitochondrial genomes in SCA3/MJD.
Collapse
Affiliation(s)
- Hongyu Yuan
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Huihua Yang
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Linliu Peng
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yun Peng
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Zhao Chen
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Linlin Wan
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Chunrong Wang
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yuting Shi
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Victor Wei Zhang
- AmCare Genomics Laboratory, Guangzhou, China; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Beisha Tang
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China; National Clinical Research Center for Geriatric Diseases, Central South University, Changsha, Hunan, China; Key Laboratory of Hunan Province in Neurodegenerative Disorders, Central South University, Changsha, Hunan, China; Laboratory of Medical Genetics, Central South University, Changsha, Hunan, China
| | - Rong Qiu
- School of Computer Science and Engineering, Central South University, Changsha, China.
| | - Hong Jiang
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, China; National Clinical Research Center for Geriatric Diseases, Central South University, Changsha, Hunan, China; Key Laboratory of Hunan Province in Neurodegenerative Disorders, Central South University, Changsha, Hunan, China; Laboratory of Medical Genetics, Central South University, Changsha, Hunan, China; Xinjiang Medical University, Urumchi, Xinjiang, China.
| |
Collapse
|
37
|
Han J, Yang YD, He Y, Liu WJ, Zhen L, Pan M, Yang X, Zhang VW, Liao C, Li DZ. Rapid prenatal diagnosis of skeletal dysplasia using medical trio exome sequencing: Benefit for prenatal counseling and pregnancy management. Prenat Diagn 2020; 40:577-584. [PMID: 31994750 DOI: 10.1002/pd.5653] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2019] [Revised: 01/02/2020] [Accepted: 01/06/2020] [Indexed: 02/06/2023]
Abstract
OBJECTIVE The aim of this study is to explore the utility of rapid medical trio exome sequencing (ES) for prenatal diagnosis using the skeletal dysplasia as an exemplar. METHOD Pregnant women who were referred for genetic testing because of ultrasound detection of fetal abnormalities suggestive of a skeletal dysplasia were identified prospectively. Fetal samples (amniocytes or cord blood), along with parental blood, were send for rapid copy number variations testing and medical trio ES in parallel. RESULTS Definitive molecular diagnosis was made in 24/27 (88.9%) cases. Chromosomal abnormality (partial trisomy 18) was detected in one case. Sequencing results had explained the prenatal phenotype enabling definitive diagnoses to be made in 23 cases. There were 16 de novo dominant pathogenic variants, four dominant pathogenic variants inherited maternally or paternally, two recessive conditions with pathogenic variants inherited from unaffected parents, and one X-linked condition. The turnaround time from receipt of samples in the laboratory to reporting sequencing results was within 2 weeks. CONCLUSION Medical trio ES can yield very timely and high diagnostic rates in fetuses presenting with suspected skeletal dysplasia. These definite diagnoses aided parental counseling and decision making in most of cases.
Collapse
Affiliation(s)
- Jin Han
- Prenatal Diagnostic Center, Guangzhou Women and Children's Medical Center Affiliated to Guangzhou Medical University, Guangzhou, China
| | - Yan-Dong Yang
- Department of Ultrasound, The Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Yi He
- Prenatal Diagnosis Center, Dongguan Women and Children Healthcare Hospital, Dongguan, China
| | - Wen-Jie Liu
- AmCare Genomics Laboratory, Guangzhou, China
| | - Li Zhen
- Prenatal Diagnostic Center, Guangzhou Women and Children's Medical Center Affiliated to Guangzhou Medical University, Guangzhou, China
| | - Min Pan
- Prenatal Diagnostic Center, Guangzhou Women and Children's Medical Center Affiliated to Guangzhou Medical University, Guangzhou, China
| | - Xin Yang
- Prenatal Diagnostic Center, Guangzhou Women and Children's Medical Center Affiliated to Guangzhou Medical University, Guangzhou, China
| | - Victor Wei Zhang
- AmCare Genomics Laboratory, Guangzhou, China.,Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas
| | - Can Liao
- Prenatal Diagnostic Center, Guangzhou Women and Children's Medical Center Affiliated to Guangzhou Medical University, Guangzhou, China
| | - Dong-Zhi Li
- Prenatal Diagnostic Center, Guangzhou Women and Children's Medical Center Affiliated to Guangzhou Medical University, Guangzhou, China
| |
Collapse
|
38
|
Zhang Y, Zhang Y, Zhang VW, Zhang C, Ding H, Yin A. Mutations in both SAMD9 and SLC19A2 genes caused complex phenotypes characterized by recurrent infection, dysphagia and profound deafness - a case report for dual diagnosis. BMC Pediatr 2019; 19:364. [PMID: 31638924 PMCID: PMC6802302 DOI: 10.1186/s12887-019-1733-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Accepted: 09/20/2019] [Indexed: 12/31/2022] Open
Abstract
Background Phenotypic difference is general in Mendelian disease. Due to the extremely low incidence for a single disease, phenotype spectrum needs to be expanded. Meanwhile, earlier knowledge says patients who suffered from two kinds of different Mendelian disease are very rare. Case presentation We describe a case of neonatal male with genital anomalies, growth delay, skin hyperpigmentation, chronic lung disease with recurrent infection, anemia, and severe deafness. Without any clear etiology after routine workflow, whole exome sequencing was carried on. A pathogenic de novo SAMD9 mutation and compound heterozygous likely-pathogenic variants in SLC19A2 were identified. Some symptoms were improved after the patient was treated with vitamin B1. Unfortunately, the boy died from sepsis and multiple organ failure before 1 year old. Conclusion Combining the phenotype and clinical progress of treatment, we report that it is the first case of a patient with both MIRAGE syndrome and TRMA syndrome.
Collapse
Affiliation(s)
- Yan Zhang
- Center for Medical Genetics, Guangdong Women and Children Hospital, 521 Xingnandadao, Guangzhou, 511442, China
| | - Yi Zhang
- Euler Genomics Co. Ltd., Beijing, China
| | - Victor Wei Zhang
- AmCare Genomics Laboratory, Guangzhou, China.,Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Chunyi Zhang
- Neonatology Department, Guangdong Women and Children Hospital, Guangzhou, China
| | - Hongke Ding
- Center for Medical Genetics, Guangdong Women and Children Hospital, 521 Xingnandadao, Guangzhou, 511442, China
| | - Aihua Yin
- Center for Medical Genetics, Guangdong Women and Children Hospital, 521 Xingnandadao, Guangzhou, 511442, China.
| |
Collapse
|
39
|
Uittenbogaard M, Wang H, Zhang VW, Wong LJ, Brantner CA, Gropman A, Chiaramello A. The nuclear background influences the penetrance of the near-homoplasmic m.1630 A > G MELAS variant in a symptomatic proband and asymptomatic mother. Mol Genet Metab 2019; 126:429-438. [PMID: 30709774 PMCID: PMC6773428 DOI: 10.1016/j.ymgme.2019.01.022] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 01/23/2019] [Accepted: 01/24/2019] [Indexed: 01/17/2023]
Abstract
In this study, we report the metabolic consequences of the m.1630 A > G variant in fibroblasts from the symptomatic proband affected with the mitochondrial encephalomyopathy lactic acidosis and stroke-like episode Syndrome and her asymptomatic mother. By long-range PCR followed by massively parallel sequencing of the mitochondrial genome, we accurately measured heteroplasmy in fibroblasts from the proband (89.6%) and her mother (94.8%). Using complementary experimental approaches, we show a functional correlation between manifestation of clinical symptoms and bioenergetic potential. Our mitochondrial morphometric analysis reveals a link between defects of mitochondrial cristae ultrastructure and symptomatic status. Despite near-homoplasmic level of the m.1630A > G variant, the mother's fibroblasts have a normal OXPHOS metabolism, which stands in contrast to the severely impaired OXPHOS response of the proband's fibroblasts. The proband's fibroblasts also exhibit glycolysis at near constitutive levels resulting in a stunted compensatory glycolytic response to offset the severe OXPHOS defect. Whole exome sequencing reveals the presence of a heterozygous nonsense VARS2 variant (p.R334X) exclusively in the proband, which removes two thirds of the VARS2 protein containing key domains interacting with the mt-tRNAval and may play a role in modulating the penetrance of the m.1630A > G variant despite similar near homoplasmic levels. Our transmission electron microscopy study also shows unexpected ultrastructural changes of chromatin suggestive of differential epigenomic regulation between the proband and her mother that may explain the differential OXPHOS response between the proband and her mother. Future study will decipher by which molecular mechanisms the nuclear background influences the penetrance of the m.1630 A > G variant causing MELAS.
Collapse
Affiliation(s)
- Martine Uittenbogaard
- Department of Anatomy and Cell Biology, George Washington University School of Medicine and Health Sciences, Washington, DC 20037, USA
| | - Hao Wang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Victor Wei Zhang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA; AmCare Genomics Laboratory, GuangZhou 510300, China
| | - Lee-Jun Wong
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA
| | - Christine A Brantner
- GW Nanofabrication and Imaging Center, Office of the Vice President for Research, George Washington University, Washington, DC 20052, USA
| | - Andrea Gropman
- Children's National Medical Center, Division of Neurogenetics and Developmental Pediatrics, Washington, DC 20010, USA
| | - Anne Chiaramello
- Department of Anatomy and Cell Biology, George Washington University School of Medicine and Health Sciences, Washington, DC 20037, USA.
| |
Collapse
|
40
|
Li Q, Li Y, Zhong M, Zhang VW, Jin W, Li S, Li L. A Rare Hb H Hydrops Fetalis Syndrome Caused by the - - SEA Deletion in Combination with the Rare Hb Hirosaki Mutation in a Chinese Patient. Hemoglobin 2018; 42:278-280. [PMID: 30486690 DOI: 10.1080/03630269.2018.1536665] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Despite the milder clinical severity of Hb H patients compared with those of Hb Bart's hydrops fetalis or patients with β-thalassemia major (β-TM), a few cases of Hb H hydrops fetalis syndrome have been reported so far. Here, we describe, for the first time in the Chinese population, one case of a neonate with Hb H hydrops fetalis syndrome caused by the - -SEA (Southeast Asian) deletion in combination with the Hb Hirosaki (HBA2: c.132C>G, p.Phe43Leu) mutation. Our study highlights the importance of continuous fetal monitoring using ultrasonography and blood screening studies of fetuses. Appropriate genetic counseling and comprehensive clinical follow-up should be performed on a pregnant woman who carried an α0-thalassemia (α0-thal) deletion and had a Hb H or Hb Bart's hydrops fetalis offspring, especially if the woman's partner also carried a hemoglobinopathy.
Collapse
Affiliation(s)
- Qiang Li
- a Department of Laboratory Medicine, Nanfang Hospital , Southern Medical University , Guangzhou , Guangdong Province , People's Republic of China
| | - Yihong Li
- b Department of Gynecology and Obstetrics, Technology Center of Prenatal Diagnosis and Genetic Diseases Diagnosis, Nanfang Hospital , Southern Medical University , Guangzhou , Guangdong Province , People's Republic of China
| | - Mei Zhong
- b Department of Gynecology and Obstetrics, Technology Center of Prenatal Diagnosis and Genetic Diseases Diagnosis, Nanfang Hospital , Southern Medical University , Guangzhou , Guangdong Province , People's Republic of China
| | - Victor Wei Zhang
- c AmCare Genomics Lab , Guangzhou , Guangdong Province , People's Republic of China.,d Department of Molecular and Human Genetics , Baylor College of Medicine , Houston , TX , USA
| | - Wangjie Jin
- b Department of Gynecology and Obstetrics, Technology Center of Prenatal Diagnosis and Genetic Diseases Diagnosis, Nanfang Hospital , Southern Medical University , Guangzhou , Guangdong Province , People's Republic of China
| | - Shaoyuan Li
- c AmCare Genomics Lab , Guangzhou , Guangdong Province , People's Republic of China
| | - Liyan Li
- b Department of Gynecology and Obstetrics, Technology Center of Prenatal Diagnosis and Genetic Diseases Diagnosis, Nanfang Hospital , Southern Medical University , Guangzhou , Guangdong Province , People's Republic of China
| |
Collapse
|
41
|
Zheng W, Yan Z, He R, Huang Y, Lin A, Huang W, Su Y, Li S, Zhang VW, Xie H. Identification of a novel DNMT1 mutation in a Chinese patient with hereditary sensory and autonomic neuropathy type IE. BMC Neurol 2018; 18:174. [PMID: 30342480 PMCID: PMC6195733 DOI: 10.1186/s12883-018-1177-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Accepted: 10/14/2018] [Indexed: 11/10/2022] Open
Abstract
Background DNA methyltransferase 1 (EC 2.1.1.37), encoded by DNMT1 gene, is one of key enzymes in maintaining DNA methylation patterns of the human genome. It plays a crucial role in embryonic development, imprinting and genome stability, cell differentiation. The dysfunction of this group of enzymes can lead to a variety of human genetic disorders. Until now, mutations in DNMT1 have been found to be associated with two distinct phenotypes. Mutations in exon 20 of this gene leads to hereditary sensory and autonomic neuropathy type IE, and mutations in exon 21 cause autosomal dominant cerebellar ataxia, deafness and narcolepsy. Case presentation Here we report a novel DNMT1 mutation in a sporadic case of a Chinese patient with cerebellar ataxia, multiple motor and sensory neuropathy, hearing loss and psychiatric manifestations. Furthermore, we elucidated its pathogenic effect through molecular genetics studies and revealed that this defective DNMT1 function is responsible for the phenotypes in this individual. Conclusion Our findings expand the spectrum of DNMT1-related disorders and provide a good example of precision medicine through the combination of exome sequencing and clinical testing. Electronic supplementary material The online version of this article (10.1186/s12883-018-1177-2) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Wenxia Zheng
- Department of Neurology, Zhujiang Hospital, Southern Medical University, 253 Industrial Avenue Middle, Guangzhou City, 510282, Guangdong Province, China
| | - Zhenxing Yan
- Department of Neurology, Zhujiang Hospital, Southern Medical University, 253 Industrial Avenue Middle, Guangzhou City, 510282, Guangdong Province, China
| | - Rongni He
- Department of Neurology, Zhujiang Hospital, Southern Medical University, 253 Industrial Avenue Middle, Guangzhou City, 510282, Guangdong Province, China
| | - Yaowei Huang
- Department of Neurology, Nanfang Hospital, Southern Medical University, 1838 Guangzhou Avenue North, Guangzhou, Guangzhou, 510515, China
| | - Aiqun Lin
- Department of Neurology, Zhujiang Hospital, Southern Medical University, 253 Industrial Avenue Middle, Guangzhou City, 510282, Guangdong Province, China
| | - Wei Huang
- Department of Neurology, Zhujiang Hospital, Southern Medical University, 253 Industrial Avenue Middle, Guangzhou City, 510282, Guangdong Province, China
| | - Yuying Su
- Department of Neurology, Zhujiang Hospital, Southern Medical University, 253 Industrial Avenue Middle, Guangzhou City, 510282, Guangdong Province, China
| | - Shaoyuan Li
- AmCare Genomics Lab, Guangzhou, Guangzhou, 510320, China
| | - Victor Wei Zhang
- AmCare Genomics Lab, Guangzhou, Guangzhou, 510320, China.,Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Huifang Xie
- Department of Neurology, Zhujiang Hospital, Southern Medical University, 253 Industrial Avenue Middle, Guangzhou City, 510282, Guangdong Province, China.
| |
Collapse
|
42
|
Fan Y, Yin W, Hu B, Kline AD, Zhang VW, Liang D, Sun Y, Wang L, Tang S, Powis Z, Li L, Yan H, Shi Z, Yang X, Chen Y, Wang J, Jiang Y, Tan H, Gu X, Wu L, Yu Y. De Novo Mutations of CCNK Cause a Syndromic Neurodevelopmental Disorder with Distinctive Facial Dysmorphism. Am J Hum Genet 2018; 103:448-455. [PMID: 30122539 DOI: 10.1016/j.ajhg.2018.07.019] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Accepted: 07/24/2018] [Indexed: 11/17/2022] Open
Abstract
Neurodevelopment is a transcriptionally orchestrated process. Cyclin K, a regulator of transcription encoded by CCNK, is thought to play a critical role in the RNA polymerase II-mediated activities. However, dysfunction of CCNK has not been linked to genetic disorders. In this study, we identified three unrelated individuals harboring de novo heterozygous copy number loss of CCNK in an overlapping 14q32.3 region and one individual harboring a de novo nonsynonymous variant c.331A>G (p.Lys111Glu) in CCNK. These four individuals, though from different ethnic backgrounds, shared a common phenotype of developmental delay and intellectual disability (DD/ID), language defects, and distinctive facial dysmorphism including high hairline, hypertelorism, thin eyebrows, dysmorphic ears, broad nasal bridge and tip, and narrow jaw. Functional assay in zebrafish larvae showed that Ccnk knockdown resulted in defective brain development, small eyes, and curly spinal cord. These defects were partially rescued by wild-type mRNA coding CCNK but not the mRNA with the identified likely pathogenic variant c.331A>G, supporting a causal role of CCNK variants in neurodevelopmental disorders. Taken together, we reported a syndromic neurodevelopmental disorder with DD/ID and facial characteristics caused by CCNK variations, possibly through a mechanism of haploinsufficiency.
Collapse
Affiliation(s)
- Yanjie Fan
- Department of Pediatric Endocrinology/Genetics, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Institute for Pediatric Research, Shanghai 200092, China
| | - Wu Yin
- Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China; CAS Key Laboratory of Brain Function and Disease, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China
| | - Bing Hu
- Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China; CAS Key Laboratory of Brain Function and Disease, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China
| | - Antonie D Kline
- Harvey Institute for Human Genetics, Greater Baltimore Medical Center, Baltimore, MD 21204, USA
| | - Victor Wei Zhang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77030, USA; AmCare Genomics Lab, GuangZhou 510300, China
| | - Desheng Liang
- State Key Laboratory of Medical Genetics, Central South University, Changsha, Hunan 410008, China
| | - Yu Sun
- Department of Pediatric Endocrinology/Genetics, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Institute for Pediatric Research, Shanghai 200092, China
| | - Lili Wang
- Department of Pediatric Endocrinology/Genetics, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Institute for Pediatric Research, Shanghai 200092, China
| | - Sha Tang
- Ambry Genetics, Aliso Viejo, CA 92656, USA
| | - Zöe Powis
- Ambry Genetics, Aliso Viejo, CA 92656, USA
| | - Lei Li
- Hefei National Laboratory for Physical Sciences at the Microscale, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China; CAS Key Laboratory of Brain Function and Disease, School of Life Sciences, University of Science and Technology of China, Hefei 230027, China
| | - Huifang Yan
- Department of Pediatrics, Peking University First Hospital, Beijing 100034, China
| | - Zhen Shi
- Department of Pediatrics, Peking University First Hospital, Beijing 100034, China
| | - Xiaoping Yang
- Department of Pediatrics, Peking University First Hospital, Beijing 100034, China; Department of Neurology, First Hospital of Shanxi Medical University, Taiyuan, Shanxi Province 030001, China
| | - Yinyin Chen
- Department of Pediatrics, Peking University First Hospital, Beijing 100034, China; Department of Neurology, First Hospital of Shanxi Medical University, Taiyuan, Shanxi Province 030001, China
| | - Jingmin Wang
- Department of Pediatrics, Peking University First Hospital, Beijing 100034, China
| | - Yuwu Jiang
- Department of Pediatrics, Peking University First Hospital, Beijing 100034, China
| | - Hu Tan
- State Key Laboratory of Medical Genetics, Central South University, Changsha, Hunan 410008, China
| | - Xuefan Gu
- Department of Pediatric Endocrinology/Genetics, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Institute for Pediatric Research, Shanghai 200092, China
| | - Lingqian Wu
- State Key Laboratory of Medical Genetics, Central South University, Changsha, Hunan 410008, China.
| | - Yongguo Yu
- Department of Pediatric Endocrinology/Genetics, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai Institute for Pediatric Research, Shanghai 200092, China.
| |
Collapse
|
43
|
Liu Q, Wang LA, Su J, Tong D, Lan W, Wang L, Liu G, Zhang J, Zhang VW, Zhang D, Chen R, Zhu Q, Jiang J. Giant bilateral adrenal myelolipomas in two Chinese families with congenital adrenal hyperplasia. Endocr Connect 2018; 7:/journals/ec/aop/ec-18-0273.xml. [PMID: 30352423 PMCID: PMC6215793 DOI: 10.1530/ec-18-0273] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2018] [Accepted: 09/05/2018] [Indexed: 12/22/2022]
Abstract
CONTEXT AND OBJECTIVES Congenital adrenal hyperplasia (CAH) is one of the most prevalent, and potentially severe, genetic inborn errors of steroid synthesis directly affecting metabolism. Most patients are diagnosed and treated at an early age. There have been very limited reports of adults with CAH-associated adrenal myelolipomas. We aimed to analyze two families with CAH-associated giant adrenal myelolipomas caused by defects in CYP21A2 and CYP17A1 genes. PARTICIPANTS AND METHODS A total of 14 individuals from two unrelated families were identified with either CYP21A2 or CYP17A1 mutations. Of note, 5 patients were found with adrenal myelolipomas. Total DNA isolated from the peripheral blood of the two probands was screened for potential mutations in the following susceptibility genes of CAH: CYP21A2, CYP11B1, CYP17A1, HSD17B3, HSD3B2, ARMC5, and STAR using Target Capture-Based Deep Sequencing; and Sanger sequencing was conducted for the family members to detect the potential mutations. RESULTS In family 1, molecular genetics sequencing revealed a compound heterozygous mutation (c.293-13C>G / c.518T>A, p.I173N) in CYP12A2 in the patient and his brother. In family 2, all three female patients with adrenal myelolipomas were found to have a compound heterozygous mutation (c.1118A>T, p.H373L / c.1459_1467del9, p.D487_F489del) in CYP17A1. CONCLUSION To avoid giant CAH-associated adrenal myelolipomas in adults, it is important to identify CAH early so appropriate treatment can be initiated to interrupt the chronic adrenal hyperstimulation resulting from increased ACTH. Genetic testing and counseling could be useful in CAH.
Collapse
Affiliation(s)
- Qiuli Liu
- Department of UrologyInstitute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, People’s Republic of China
| | - Lin-ang Wang
- Department of UrologyInstitute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, People’s Republic of China
| | - Jian Su
- Department of UrologyAffiliated Hospital of Nanjing University of Traditional Chinese Medical, Nanjing, People’s Republic of China
| | - Dali Tong
- Department of UrologyInstitute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, People’s Republic of China
| | - Weihua Lan
- Department of UrologyInstitute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, People’s Republic of China
| | - Luofu Wang
- Department of UrologyInstitute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, People’s Republic of China
| | - Gaolei Liu
- Department of UrologyInstitute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, People’s Republic of China
| | - Jun Zhang
- Department of ObstetricsThird Affiliated Hospital of Sun Yat-sen University, Guangzhou, People’s Republic of China
| | - Victor Wei Zhang
- Department of Molecular and Human GeneticsBaylor College of Medicine, Houston, Texas, USA
- AmCare Genomics LabGuangzhou, People’s Republic of China
| | - Dianzheng Zhang
- Department of Bio-Medical SciencesPhiladelphia College of Osteopathic Medicine, Philadelphia, Pennsylvania, USA
| | - Rongrong Chen
- Geneplus-Beijing InstituteBeijing, People’s Republic of China
| | - Qingyi Zhu
- Department of UrologyAffiliated Hospital of Nanjing University of Traditional Chinese Medical, Nanjing, People’s Republic of China
| | - Jun Jiang
- Department of UrologyInstitute of Surgery Research, Daping Hospital, Third Military Medical University, Chongqing, People’s Republic of China
| |
Collapse
|
44
|
Wang L, Zhang VW, Li S, Li H, Sun Y, Li J, Zhu Y, He R, Lin J, Zhang C. The clinical spectrum and genetic variability of limb-girdle muscular dystrophy in a cohort of Chinese patients. Orphanet J Rare Dis 2018; 13:133. [PMID: 30107846 PMCID: PMC6092860 DOI: 10.1186/s13023-018-0859-6] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 06/27/2018] [Indexed: 12/19/2022] Open
Abstract
Background Limb-girdle muscular dystrophy (LGMD) is a commonly diagnosed hereditary muscular disorder, characterized by the progressive weakness of the limb-girdle muscles. Although the condition has been well-characterized, clinical and genetic heterogeneity can be observed in patients with LGMD. Here, we aimed to describe the clinical manifestations and genetic variability among a cohort of patients with LGMD in South China. Results We analyzed the clinical information, muscle magnetic resonance imaging (MRI) findings, and genetic results obtained from 30 patients (24 families) with clinically suspected LGMD. In 24 probands, 38 variants were found in total, of which 18 were shown to be novel. Among the 30 patients, the most common subtypes were dysferlinopathy in eight (26.67%), sarcoglycanopathies in eight [26.67%; LGMD 2C in three (10.00%), LGMD 2D in three (10.00%), and LGMD 2F in two (6.67%)], LGMD 2A in seven (23.33%), followed by LGMD 1B in three (10.00%), LGMD 2I in three (10.00%), and early onset recessive Emery-Dreifuss-like phenotype without cardiomyopathy in one (3.33%). Furthermore, we also observed novel clinical presentations for LGMD 1B, 2F, and 2I patients with hypermobility of the joints in the upper limbs, a LGMD 2F patient with delayed language development, and other manifestations. Moreover, distinct distributions of fatty infiltration in patients with LGMD 2A, dysferlinopathy, and the early onset recessive Emery-Dreifuss-like phenotype without cardiomyopathy were also observed based on muscle MRI results. Conclusions In this study, we expanded the clinical spectrum and genetic variability found in patients with LGMD, which provided additional insights into genotype and phenotype correlations in this disease. Electronic supplementary material The online version of this article (10.1186/s13023-018-0859-6) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Liang Wang
- Department of Neurology, National Key Clinical Department and Key Discipline of Neurology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan 2 Road, Guangzhou, 510080, GD, China
| | - Victor Wei Zhang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA.,AmCare Genomics Lab, Guangzhou, 510300, GD, China
| | - Shaoyuan Li
- AmCare Genomics Lab, Guangzhou, 510300, GD, China
| | - Huan Li
- Department of Neurology, National Key Clinical Department and Key Discipline of Neurology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan 2 Road, Guangzhou, 510080, GD, China
| | - Yiming Sun
- Department of Health Care, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, 510080, GD, China
| | - Jing Li
- Department of Neurology, National Key Clinical Department and Key Discipline of Neurology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan 2 Road, Guangzhou, 510080, GD, China
| | - Yuling Zhu
- Department of Neurology, National Key Clinical Department and Key Discipline of Neurology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan 2 Road, Guangzhou, 510080, GD, China
| | - Ruojie He
- Department of Neurology, National Key Clinical Department and Key Discipline of Neurology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan 2 Road, Guangzhou, 510080, GD, China
| | - Jinfu Lin
- Department of Neurology, National Key Clinical Department and Key Discipline of Neurology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan 2 Road, Guangzhou, 510080, GD, China
| | - Cheng Zhang
- Department of Neurology, National Key Clinical Department and Key Discipline of Neurology, The First Affiliated Hospital, Sun Yat-sen University, 58 Zhongshan 2 Road, Guangzhou, 510080, GD, China.
| |
Collapse
|
45
|
Yuan P, He Z, Zheng L, Wang W, Li Y, Zhao H, Zhang VW, Zhang Q, Yang D. Genetic evidence of ‘genuine’ empty follicle syndrome: a novel effective mutation in the LHCGR gene and review of the literature. Hum Reprod 2017; 32:944-953. [PMID: 28175319 DOI: 10.1093/humrep/dex015] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2016] [Accepted: 01/17/2017] [Indexed: 11/14/2022] Open
Affiliation(s)
- Ping Yuan
- Department of Obstetrics and Gynecology, IVF Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107 Yan Jiang West Road, Guangzhou, Guangdong 510120, China
| | - Zuyong He
- State Key Laboratory of Biocontrol, School of Life Sciences, Sun Yat-sen University, 135 Xingang Xi Road, Guangzhou, Guangdong 510275, China
| | - Lingyan Zheng
- Department of Obstetrics and Gynecology, IVF Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107 Yan Jiang West Road, Guangzhou, Guangdong 510120, China
| | - Wenjun Wang
- Department of Obstetrics and Gynecology, IVF Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107 Yan Jiang West Road, Guangzhou, Guangdong 510120, China
| | - Yu Li
- Department of Obstetrics and Gynecology, IVF Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107 Yan Jiang West Road, Guangzhou, Guangdong 510120, China
| | - Haijing Zhao
- Department of Obstetrics and Gynecology, IVF Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107 Yan Jiang West Road, Guangzhou, Guangdong 510120, China
| | - Victor Wei Zhang
- Department of Molecular and Human Genetics, Baylor College of Medicine, one Baylor Plaza, Houston, TX77030, US
- AmCare Genomics Laboratory, International BioIsland, Luoxuan 4th Road, 2-4C-201, Guangzhou, Guangdong 510300, China
| | - Qingxue Zhang
- Department of Obstetrics and Gynecology, IVF Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107 Yan Jiang West Road, Guangzhou, Guangdong 510120, China
| | - Dongzi Yang
- Department of Obstetrics and Gynecology, IVF Center, Sun Yat-sen Memorial Hospital, Sun Yat-sen University, 107 Yan Jiang West Road, Guangzhou, Guangdong 510120, China
| |
Collapse
|
46
|
Dai H, Zhang VW, El-Hattab AW, Ficicioglu C, Shinawi M, Lines M, Schulze A, McNutt M, Gotway G, Tian X, Chen S, Wang J, Craigen WJ, Wong LJ. FBXL4 defects are common in patients with congenital lactic acidemia and encephalomyopathic mitochondrial DNA depletion syndrome. Clin Genet 2017; 91:634-639. [PMID: 27743463 DOI: 10.1111/cge.12894] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2016] [Revised: 10/11/2016] [Accepted: 10/11/2016] [Indexed: 11/30/2022]
Abstract
Mutations in FBXL4 have recently been recognized to cause a mitochondrial disorder, with clinical features including early onset lactic acidosis, hypotonia, and developmental delay. FBXL4 sequence analysis was performed in 808 subjects suspected to have a mitochondrial disorder. In addition, 28 samples from patients with early onset of lactic acidosis, but without identifiable mutations in 192 genes known to cause mitochondrial diseases, were examined for FBXL4 mutations. Definitive diagnosis was made in 10 new subjects with a total of 7 novel deleterious variants; 5 null and 2 missense substitutions. All patients exhibited congenital lactic acidemia, most of them with severe encephalopathic presentation, and global developmental delay. Overall, FBXL4 defects account for at least 0.7% (6 out of 808) of subjects suspected to have a mitochondrial disorder, and as high as 14.3% (4 out of 28) in young children with congenital lactic acidosis and clinical features of mitochondrial disease. Including FBLX4 in the mitochondrial diseases panel should be particularly important for patients with congenital lactic acidosis.
Collapse
Affiliation(s)
- H Dai
- Baylor Genetics, Houston, TX, USA
| | - V W Zhang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - A W El-Hattab
- Division of Clinical Genetics and Metabolic Disorders, Pediatric Department, Tawam Hospital, Al-Ain, United Arab Emirates
| | - C Ficicioglu
- Division of Human Genetics and Metabolism, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - M Shinawi
- Division of Genetics and Genomics, Washington University School of Medicine, St. Louis, MO, USA
| | - M Lines
- Department of Genetics, Children's Hospital of Eastern Ontario, Ottawa, Ontario, Canada
| | - A Schulze
- Division of Clinical and Metabolic Genetics, The Hospital for Sick Children and University of Toronto, Toronto, Ontario, Canada
| | - M McNutt
- Children's Medical Center, Dallas, TX, USA
| | - G Gotway
- Children's Medical Center, Dallas, TX, USA
| | - X Tian
- Baylor Genetics, Houston, TX, USA
| | - S Chen
- Baylor Genetics, Houston, TX, USA
| | - J Wang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - W J Craigen
- Baylor Genetics, Houston, TX, USA.,Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - L-J Wong
- Baylor Genetics, Houston, TX, USA.,Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| |
Collapse
|
47
|
Li J, Dai H, Feng Y, Tang J, Chen S, Tian X, Gorman E, Schmitt ES, Hansen TAA, Wang J, Plon SE, Zhang VW, Wong LJC. A Comprehensive Strategy for Accurate Mutation Detection of the Highly Homologous PMS2. J Mol Diagn 2016; 17:545-53. [PMID: 26320870 DOI: 10.1016/j.jmoldx.2015.04.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Revised: 04/07/2015] [Accepted: 04/29/2015] [Indexed: 10/23/2022] Open
Abstract
Germline mutations in the DNA mismatch repair gene PMS2 underlie the cancer susceptibility syndrome, Lynch syndrome. However, accurate molecular testing of PMS2 is complicated by a large number of highly homologous sequences. To establish a comprehensive approach for mutation detection of PMS2, we have designed a strategy combining targeted capture next-generation sequencing (NGS), multiplex ligation-dependent probe amplification, and long-range PCR followed by NGS to simultaneously detect point mutations and copy number changes of PMS2. Exonic deletions (E2 to E9, E5 to E9, E8, E10, E14, and E1 to E15), duplications (E11 to E12), and a nonsense mutation, p.S22*, were identified. Traditional multiplex ligation-dependent probe amplification and Sanger sequencing approaches cannot differentiate the origin of the exonic deletions in the 3' region when PMS2 and PMS2CL share identical sequences as a result of gene conversion. Our approach allows unambiguous identification of mutations in the active gene with a straightforward long-range-PCR/NGS method. Breakpoint analysis of multiple samples revealed that recurrent exon 14 deletions are mediated by homologous Alu sequences. Our comprehensive approach provides a reliable tool for accurate molecular analysis of genes containing multiple copies of highly homologous sequences and should improve PMS2 molecular analysis for patients with Lynch syndrome.
Collapse
Affiliation(s)
- Jianli Li
- Baylor Miraca Genetics Laboratories, Houston, Texas
| | | | - Yanming Feng
- Baylor Miraca Genetics Laboratories, Houston, Texas
| | - Jia Tang
- Baylor Miraca Genetics Laboratories, Houston, Texas
| | - Stella Chen
- Baylor Miraca Genetics Laboratories, Houston, Texas
| | - Xia Tian
- Baylor Miraca Genetics Laboratories, Houston, Texas
| | | | | | - Terah A A Hansen
- Central Washington Genetics Program, Yakima Valley Memorial Hospital, Yakima, Washington
| | - Jing Wang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas
| | - Sharon E Plon
- Department of Pediatrics, Baylor College of Medicine, Houston, Texas
| | - Victor Wei Zhang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas.
| | - Lee-Jun C Wong
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas.
| |
Collapse
|
48
|
Qin L, Wang J, Tian X, Yu H, Truong C, Mitchell JJ, Wierenga KJ, Craigen WJ, Zhang VW, Wong LJC. Detection and Quantification of Mosaic Mutations in Disease Genes by Next-Generation Sequencing. J Mol Diagn 2016; 18:446-453. [PMID: 26944031 DOI: 10.1016/j.jmoldx.2016.01.002] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Revised: 01/08/2016] [Accepted: 01/14/2016] [Indexed: 12/19/2022] Open
Abstract
The identification of mosaicism is important in establishing a disease diagnosis, assessing recurrence risk, and genetic counseling. Next-generation sequencing (NGS) with deep sequence coverage enhances sensitivity and allows for accurate quantification of the level of mosaicism. NGS identifies low-level mosaicism that would be undetectable by conventional Sanger sequencing. A customized DNA probe library was used for capturing targeted genes, followed by deep NGS analysis. The mean coverage depth per base was approximately 800×. The NGS sequence data were analyzed for single-nucleotide variants and copy number variations. Mosaic mutations in 10 cases/families were detected and confirmed by NGS analysis. Mosaicism was identified for autosomal dominant (JAG1, COL3A1), autosomal recessive (PYGM), and X-linked (PHKA2, PDHA1, OTC, and SLC6A8) disorders. The mosaicism was identified either in one or more tissues from the probands or in a parent of an affected child. When analyzing data from patients with unusual testing results or inheritance patterns, it is important to further evaluate the possibility of mosaicism. Deep NGS analysis not only provides insights into the spectrum of mosaic mutations but also underlines the importance of the detection of mosaicism as an integral part of clinical molecular diagnosis and genetic counseling.
Collapse
Affiliation(s)
- Lan Qin
- Baylor Miraca Genetics Laboratories, Houston, Texas
| | - Jing Wang
- Baylor Miraca Genetics Laboratories, Houston, Texas; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas
| | - Xia Tian
- Baylor Miraca Genetics Laboratories, Houston, Texas
| | - Hui Yu
- Baylor Miraca Genetics Laboratories, Houston, Texas
| | | | - John J Mitchell
- Division of Pediatric Endocrinology, Montreal Children's Hospital, Montreal, Quebec, Canada
| | - Klaas J Wierenga
- Department of Pediatrics, Section of Genetics, University of Oklahoma Health Science Center, Oklahoma City, Oklahoma
| | - William J Craigen
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas
| | - Victor Wei Zhang
- Baylor Miraca Genetics Laboratories, Houston, Texas; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas
| | - Lee-Jun C Wong
- Baylor Miraca Genetics Laboratories, Houston, Texas; Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas.
| |
Collapse
|
49
|
Abstract
Next-generation sequencing (NGS) based on massively parallel sequencing (MPS) of the entire 16,569 bp mitochondrial genome generates thousands of reads for each nucleotide position. The high-throughput sequence data generated allow the detection of mitochondrial DNA (mtDNA) point mutations and deletions with the ability to accurately quantify the mtDNA point mutation heteroplasmy and to determine the deletion breakpoints. In addition, this method is particularly sensitive for the detection of low-level mtDNA large deletions and multiple deletions. It is by far the most powerful tool for molecular diagnosis of mtDNA disorders.
Collapse
Affiliation(s)
- Meagan E Palculict
- Department of Molecular and Human Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA
| | - Victor Wei Zhang
- Department of Molecular and Human Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA
| | - Lee-Jun Wong
- Department of Molecular and Human Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA
| | - Jing Wang
- Department of Molecular and Human Genetics, Baylor College of Medicine, One Baylor Plaza, Houston, TX, 77030, USA.
| |
Collapse
|
50
|
Miller MJ, Burrage LC, Gibson JB, Strenk ME, Lose EJ, Bick DP, Elsea SH, Sutton VR, Sun Q, Graham BH, Craigen WJ, Zhang VW, Wong LJC. Recurrent ACADVL molecular findings in individuals with a positive newborn screen for very long chain acyl-coA dehydrogenase (VLCAD) deficiency in the United States. Mol Genet Metab 2015; 116:139-45. [PMID: 26385305 PMCID: PMC4790081 DOI: 10.1016/j.ymgme.2015.08.011] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 08/26/2015] [Accepted: 08/26/2015] [Indexed: 12/30/2022]
Abstract
Very long chain acyl-coA dehydrogenase deficiency (VLCADD) is an autosomal recessive inborn error of fatty acid oxidation detected by newborn screening (NBS). Follow-up molecular analyses are often required to clarify VLCADD-suggestive NBS results, but to date the outcome of these studies are not well described for the general screen-positive population. In the following study, we report the molecular findings for 693 unrelated patients that sequentially received Sanger sequence analysis of ACADVL as a result of a positive NBS for VLCADD. Highlighting the variable molecular underpinnings of this disorder, we identified 94 different pathogenic ACADVL variants (40 novel), as well as 134 variants of unknown clinical significance (VUSs). Evidence for the pathogenicity of a subset of recurrent VUSs was provided using multiple in silico analyses. Surprisingly, the most frequent finding in our cohort was carrier status, 57% all individuals had a single pathogenic variant or VUS. This result was further supported by follow-up array and/or acylcarnitine analysis that failed to provide evidence of a second pathogenic allele. Notably, exon-targeted array analysis of 131 individuals screen positive for VLCADD failed to identify copy number changes in ACADVL thus suggesting this test has a low yield in the setting of NBS follow-up. While no genotype was common, the c.848T>C (p.V283A) pathogenic variant was clearly the most frequent; at least one copy was found in ~10% of all individuals with a positive NBS. Clinical and biochemical data for seven unrelated patients homozygous for the p.V283A allele suggests that it results in a mild phenotype that responds well to standard treatment, but hypoglycemia can occur. Collectively, our data illustrate the molecular heterogeneity of VLCADD and provide novel insight into the outcomes of NBS for this disorder.
Collapse
Affiliation(s)
- Marcus J Miller
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77021, United States
| | - Lindsay C Burrage
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77021, United States
| | - James B Gibson
- Section of Clinical Genetics and Metabolism, 'Specially for Children, Austin, TX 78723, United States
| | - Meghan E Strenk
- Children's Mercy Hospital, Kansas City, MO 64108, United States
| | - Edward J Lose
- Department of Genetics, University of Alabama Birmingham, Birmingham, AL 35294, United States
| | - David P Bick
- Section of Genetics, Department of Pediatrics, Medical College of Wisconsin, Milwaukee, WI 53226, United States
| | - Sarah H Elsea
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77021, United States
| | - V Reid Sutton
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77021, United States
| | - Qin Sun
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77021, United States
| | - Brett H Graham
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77021, United States
| | - William J Craigen
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77021, United States
| | - Victor Wei Zhang
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77021, United States
| | - Lee-Jun C Wong
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX 77021, United States.
| |
Collapse
|