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Wen H, Li Q, Mei S, Cai J, Huang X, Zhao J. A novel frameshift mutation in the NHS gene causes Nance-Horan syndrome in a Chinese family. Gene 2024; 907:148268. [PMID: 38350513 DOI: 10.1016/j.gene.2024.148268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 12/01/2023] [Accepted: 02/07/2024] [Indexed: 02/15/2024]
Affiliation(s)
- Huaming Wen
- Department of Ophthalmology, Chang'an Hospital of Dongguan, Dongguan 538240, Guangdong, China
| | - Qianwen Li
- Department of Oral & Maxillofacial Surgery, Shenzhen Stomatology Hospital, The Affiliated Shenzhen stomatology Hospital of Shenzhen University, Shenzhen 518000, Guangdong, China
| | - Shaoyi Mei
- Shenzhen Eye Hospital Affiliated to Jinan University, Shenzhen Eye Institute, Shenzhen 518040, Guangdong, China
| | - Jiamin Cai
- Shenzhen Eye Hospital Affiliated to Jinan University, Shenzhen Eye Institute, Shenzhen 518040, Guangdong, China
| | - Xiaosheng Huang
- Shenzhen Eye Hospital Affiliated to Jinan University, Shenzhen Eye Institute, Shenzhen 518040, Guangdong, China.
| | - Jun Zhao
- Department of Ophthalmology, Shenzhen People's Hospital (The Second Clinical Medical College, Jinan University, The First Affiliated Hospital, Southern University of Science and Technology), Shenzen 518020, Guangdong, China.
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2
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Yu X, Zhao Y, Yang Z, Chen X, Kang G. Genetic research on Nance-Horan syndrome caused by a novel mutation in the NHS gene. Gene 2024; 906:148223. [PMID: 38286268 DOI: 10.1016/j.gene.2024.148223] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 01/21/2024] [Accepted: 01/26/2024] [Indexed: 01/31/2024]
Affiliation(s)
- Xuelin Yu
- Department of Ophthalmology, The Affiliated Hospital of Southwest Medical University, Luzhou 646000, China.
| | - Yueyue Zhao
- Department of Ophthalmology, The Affiliated Hospital of Southwest Medical University, Luzhou 646000, China.
| | - Zhenghua Yang
- Department of Ophthalmology, The Affiliated Hospital of Southwest Medical University, Luzhou 646000, China.
| | - Xing Chen
- Department of Ophthalmology, The Affiliated Hospital of Southwest Medical University, Luzhou 646000, China.
| | - Gangjing Kang
- Department of Ophthalmology, The Affiliated Hospital of Southwest Medical University, Luzhou 646000, China.
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Guven Y, Saracoglu HP, Aksakal SD, Kalayci T, Altunoglu U, Uyguner ZO, Eraslan S, Borklu E, Kayserili H. Nance-Horan Syndrome: characterization of dental, clinical and molecular features in three new families. BMC Oral Health 2023; 23:314. [PMID: 37221585 DOI: 10.1186/s12903-023-03029-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 05/09/2023] [Indexed: 05/25/2023] Open
Abstract
BACKGROUND Nance-Horan syndrome (NHS; MIM 302,350) is an extremely rare X-linked dominant disease characterized by ocular and dental anomalies, intellectual disability, and facial dysmorphic features. CASE PRESENTATION We report on five affected males and three carrier females from three unrelated NHS families. In Family 1, index (P1) showing bilateral cataracts, iris heterochromia, microcornea, mild intellectual disability, and dental findings including Hutchinson incisors, supernumerary teeth, bud-shaped molars received clinical diagnosis of NHS and targeted NHS gene sequencing revealed a novel pathogenic variant, c.2416 C > T; p.(Gln806*). In Family 2, index (P2) presenting with global developmental delay, microphthalmia, cataracts, and ventricular septal defect underwent SNP array testing and a novel deletion encompassing 22 genes including the NHS gene was detected. In Family 3, two half-brothers (P3 and P4) and maternal uncle (P5) had congenital cataracts and mild to moderate intellectual deficiency. P3 also had autistic and psychobehavioral features. Dental findings included notched incisors, bud-shaped permanent molars, and supernumerary molars. Duo-WES analysis on half-brothers showed a hemizygous novel deletion, c.1867delC; p.(Gln623ArgfsTer26). CONCLUSIONS Dental professionals can be the first-line specialists involved in the diagnosis of NHS due to its distinct dental findings. Our findings broaden the spectrum of genetic etiopathogenesis associated with NHS and aim to raise awareness among dental professionals.
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Affiliation(s)
- Yeliz Guven
- Department of Pedodontics, Faculty of Dentistry, Istanbul University, Vezneciler, Istanbul, Turkey.
| | | | - Sermin Dicle Aksakal
- Department of Pedodontics, Faculty of Dentistry, Istanbul University, Vezneciler, Istanbul, Turkey
| | - Tugba Kalayci
- Department of Medical Genetics, Istanbul Medical Faculty, Istanbul University, Istanbul, Turkey
| | - Umut Altunoglu
- Department of Medical Genetics, Koc University School of Medicine (KUSoM), Sarıyer, Istanbul, Turkey
- Genetic Diseases Evaluation Center, Koc University Hospital, Zeytinburnu, Istanbul, Turkey
| | - Zehra Oya Uyguner
- Department of Medical Genetics, Istanbul Medical Faculty, Istanbul University, Istanbul, Turkey
| | - Serpil Eraslan
- Genetic Diseases Evaluation Center, Koc University Hospital, Zeytinburnu, Istanbul, Turkey
| | - Esra Borklu
- Genetic Diseases Evaluation Center, Koc University Hospital, Zeytinburnu, Istanbul, Turkey
| | - Hulya Kayserili
- Department of Medical Genetics, Koc University School of Medicine (KUSoM), Sarıyer, Istanbul, Turkey
- Genetic Diseases Evaluation Center, Koc University Hospital, Zeytinburnu, Istanbul, Turkey
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Huang Y, Ma L, Zhang Z, Nie S, Zhou Y, Zhang J, Wang C, Fang X, Quan Y, He T, Liu A, Peng D. Nance-Horan syndrome pedigree due to a novel microdeletion and skewed X chromosome inactivation. Mol Genet Genomic Med 2022; 11:e2100. [PMID: 36370055 PMCID: PMC9938751 DOI: 10.1002/mgg3.2100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 08/16/2022] [Accepted: 11/03/2022] [Indexed: 11/15/2022] Open
Abstract
BACKGROUND Nance-Horan syndrome (NHS) is a rare and often overlooked X-linked dominant disorder characterized by dense congenital cataracts, dental abnormalities, and mental retardation. The majority of NHS variations include frameshift mutations, nonsense mutations, microdeletions, and insertions. METHODS Copy number variation sequencing was performed to determine the microdeletion. The expression of NHS was detected by RT-PCR. Four family members were tested for X chromosome inactivation. RESULTS In this study, all members were examined for systemic examinations and genetic testing of four members and two affected subjects are observed. We identified a heterozygous microdeletion of -0.52 Mb at Xp22.13 in a female proband presenting NHS phenotypically. The microdeletion contains the REPS2 and NHS genes and was inherited from a phenotypically normal mother. Of interest, the expression NHS of proband was reduced and the skewed X chromosome inactivation rate reached more than 85% compared with her mother and the control. It was concluded that the haploinsufficiency of the NHS gene may account for the majority of clinical symptoms in the affected subjects. The variability among female carriers presumably results from nonrandom X chromosome inactivation. CONCLUSION Our findings broaden the spectrum of NHS mutations and provide molecular insight into NHS clinical prenatal genetic diagnosis.
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Affiliation(s)
- Yazhou Huang
- Department of Medical GeneticsChangde First People's HospitalChangdeChina
| | - Linya Ma
- Department of Medical GeneticsChangde First People's HospitalChangdeChina
| | - Zhaoxia Zhang
- Department of Medical GeneticsChangde First People's HospitalChangdeChina
| | - Shujuan Nie
- Department of Medical GeneticsChangde First People's HospitalChangdeChina
| | - Yuan Zhou
- Department of Medical GeneticsChangde First People's HospitalChangdeChina
| | - Jibo Zhang
- Department of Medical GeneticsChangde First People's HospitalChangdeChina
| | - Chao Wang
- Department of Medical GeneticsChangde First People's HospitalChangdeChina
| | - Xingxin Fang
- Department of Medical GeneticsChangde First People's HospitalChangdeChina
| | - Yingting Quan
- Department of Medical GeneticsChangde First People's HospitalChangdeChina
| | - Ting He
- Department of Medical GeneticsChangde First People's HospitalChangdeChina
| | - Anhui Liu
- Affiliated Hospital of Changde CityUniversity of South ChinaHengyangChina
| | - Dan Peng
- Department of Medical GeneticsChangde First People's HospitalChangdeChina,Affiliated Hospital of Changde CityUniversity of South ChinaHengyangChina
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5
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Prominent and Regressive Brain Developmental Disorders Associated with Nance-Horan Syndrome. Brain Sci 2021; 11:brainsci11091150. [PMID: 34573171 PMCID: PMC8465299 DOI: 10.3390/brainsci11091150] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 08/26/2021] [Accepted: 08/27/2021] [Indexed: 11/17/2022] Open
Abstract
Nance-Horan syndrome (NHS) is a rare X-linked developmental disorder caused mainly by loss of function variants in the NHS gene. NHS is characterized by congenital cataracts, dental anomalies, and distinctive facial features, and a proportion of the affected individuals also present intellectual disability and congenital cardiopathies. Despite identification of at least 40 distinct hemizygous variants leading to NHS, genotype-phenotype correlations remain largely elusive. In this study, we describe a Sicilian family affected with congenital cataracts and dental anomalies and diagnosed with NHS by whole-exome sequencing (WES). The affected boy from this family presented a late regression of cognitive, motor, language, and adaptive skills, as well as broad behavioral anomalies. Furthermore, brain imaging showed corpus callosum anomalies and periventricular leukoencephalopathy. We expand the phenotypic and mutational NHS spectrum and review potential disease mechanisms underlying the central neurological anomalies and the potential neurodevelopmental features associated with NHS.
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Wei M, Qi A, Mo H, Wu K, Ma X, Wang B. A novel NHS mutation in a Chinese family with Nance‑Horan Syndrome. Mol Med Rep 2019; 19:4419-4424. [PMID: 30942463 DOI: 10.3892/mmr.2019.10106] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2018] [Accepted: 11/15/2018] [Indexed: 11/06/2022] Open
Abstract
Nance‑Horan syndrome (NHS) is a rare X‑linked disorder with various clinical manifestations. The present study aimed to identify the pathogenic mutation causing NHS in a three‑generation Chinese family with 4 individuals presenting primarily with congenital cataracts. The genomic DNA of 5 individuals was collected, and family history and clinical information were recorded. Whole exome sequencing was performed on the proband, and candidate mutations were filtered by a series of screening processes and validated by Sanger sequencing. The identified pathogenic mutation was confirmed by co‑segregation analysis. Finally, a novel frameshift mutation (NM_001291867.1: c.302dupA; p.Ala102fs) was identified in the NHS actin remodeling regulator (NHS) gene, which co‑segregated with congenital cataracts in this family. Carrier females exhibited similar but milder clinical symptoms compared with the affected male. These clinical symptoms were consistent with the phenotypic features of the NHS‑associated disease, NHS. In summary, the present study identified a novel NHS mutation in a Chinese family with atypical NHS; the results broaden the known pathogenic mutation spectrum of NHS and will aid in the genetic counseling of patients with NHS. The data from the present study also suggest that genetic analysis may be required for the diagnosis of this disease.
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Affiliation(s)
- Meirong Wei
- Department of Ophthalmology, Liuzhou Maternal and Child Healthcare Hospital, Liuzhou, Guangxi 545001, P.R. China
| | - Anhui Qi
- Graduate School of Peking Union Medical College, Beijing 100730, P.R. China
| | - Haiming Mo
- Department of Ophthalmology, Liuzhou Maternal and Child Healthcare Hospital, Liuzhou, Guangxi 545001, P.R. China
| | - Kailin Wu
- Department of Ophthalmology, Liuzhou Maternal and Child Healthcare Hospital, Liuzhou, Guangxi 545001, P.R. China
| | - Xu Ma
- Center for Genetics, National Research Institute for Family Planning, Beijing 100081, P.R. China
| | - Binbin Wang
- Graduate School of Peking Union Medical College, Beijing 100730, P.R. China
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Chalakkal P, De Souza N, Martires S, Soares R. Oral manifestations of Nance–Horan syndrome: A report of a rare case. Contemp Clin Dent 2019; 10:174-177. [PMID: 32015664 PMCID: PMC6975004 DOI: 10.4103/ccd.ccd_490_18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Nance–Horan syndrome (NHS) or X-linked cataract dental syndrome is an extremely rare condition affecting multiple systems. It is characterized by ophthalmological, dental, and facial anomalies. Individuals display facial dysmorphism, mandibular prognathism, congenital cataract, and strabismus. Common dental findings include notching of incisors, supernumerary teeth, and mulberry molars. This article aims to provide an update on NHS while reporting previously unreported findings such as talon's cusp and taurodontism.
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8
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A novel small deletion in the NHS gene associated with Nance-Horan syndrome. Sci Rep 2018; 8:2398. [PMID: 29402928 PMCID: PMC5799206 DOI: 10.1038/s41598-018-20787-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 01/24/2018] [Indexed: 11/29/2022] Open
Abstract
Nance-Horan syndrome is a rare X-linked recessive inherited disease with clinical features including severe bilateral congenital cataracts, characteristic facial and dental abnormalities. Data from Chinese Nance-Horan syndrome patients are limited. We assessed the clinical manifestations of a Chinese Nance-Horan syndrome pedigree and identified the genetic defect. Genetic analysis showed that 3 affected males carried a novel small deletion in NHS gene, c.263_266delCGTC (p.Ala89TrpfsTer106), and 2 female carriers were heterozygous for the same variant. All 3 affected males presented with typical Nance-Horan syndrome features. One female carrier displayed lens opacities centered on the posterior Y-suture in both eyes, as well as mild dental abnormalities. We recorded the clinical features of a Chinese Nance-Horan syndrome family and broadened the spectrum of mutations in the NHS gene.
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Gómez-Laguna L, Martínez-Herrera A, Reyes-de la Rosa ADP, García-Delgado C, Nieto-Martínez K, Fernández-Ramírez F, Valderrama-Atayupanqui TY, Morales-Jiménez AB, Villa-Morales J, Kofman S, Cervantes A, Morán-Barroso VF. Nance-Horan syndrome in females due to a balanced X;1 translocation that disrupts the NHS gene: Familial case report and review of the literature. Ophthalmic Genet 2017; 39:56-62. [PMID: 28922055 DOI: 10.1080/13816810.2017.1363245] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
The Nance-Horan syndrome is an X-linked disorder characterized by congenital cataract, facial features, microcornea, microphthalmia, and dental anomalies; most of the cases are due to NHS gene mutations on Xp22.13. Heterozygous carrier females generally present less severe features, and up to 30% of the affected males have intellectual disability. We describe two patients, mother and daughter, manifesting Nance-Horan syndrome. The cytogenetic and molecular analyses demonstrated a 46,X,t(X;1)(p22.13;q22) karyotype in each of them. No copy-number genomic imbalances were detected by high-density microarray analysis. The mother had a preferential inactivation of the normal X chromosome; expression analysis did not detect any mRNA isoform of NHS. This is the first report of Nance-Horan syndrome due to a skewed X chromosome inactivation resulting from a balanced translocation t(X;1) that disrupts the NHS gene expression, with important implications for clinical presentation and genetic counseling.
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Affiliation(s)
- Laura Gómez-Laguna
- a Service of Genetics , Hospital General de México Dr. Eduardo Liceaga , Mexico City , Mexico
| | | | | | | | - Karem Nieto-Martínez
- b Faculty of Medicine , Universidad Nacional Autónoma de México (UNAM) , Mexico City , Mexico
| | | | | | | | - Judith Villa-Morales
- c Department of Genetics , Hospital Infantil de México Federico Gómez , Mexico City , Mexico
| | - Susana Kofman
- a Service of Genetics , Hospital General de México Dr. Eduardo Liceaga , Mexico City , Mexico
| | - Alicia Cervantes
- a Service of Genetics , Hospital General de México Dr. Eduardo Liceaga , Mexico City , Mexico.,b Faculty of Medicine , Universidad Nacional Autónoma de México (UNAM) , Mexico City , Mexico
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10
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Shoshany N, Avni I, Morad Y, Weiner C, Einan-Lifshitz A, Pras E. NHS Gene Mutations in Ashkenazi Jewish Families with Nance-Horan Syndrome. Curr Eye Res 2017; 42:1240-1244. [PMID: 28557584 DOI: 10.1080/02713683.2017.1304560] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
PURPOSE To describe ocular and extraocular abnormalities in two Ashkenazi Jewish families with infantile cataract and X-linked inheritance, and to identify their underlying mutations. METHODS Seven affected members were recruited. Medical history, clinical findings, and biometric measurements were recorded. Mutation analysis of the Nance-Horan syndrome (NHS) gene was performed by direct sequencing of polymerase chain reaction-amplified exons. RESULTS An unusual anterior Y-sutural cataract was documented in the affected male proband. Other clinical features among examined patients included microcorneas, long and narrow faces, and current or previous dental anomalies. A nonsense mutation was identified in each family, including a previously described 742 C>T, p.(Arg248*) mutation in Family A, and a novel mutation 2915 C>A, p.(Ser972*) in Family B. CONCLUSIONS Our study expands the repertoire of NHS mutations and the related phenotype, including newly described anterior Y-sutural cataract and dental findings.
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Affiliation(s)
- Nadav Shoshany
- a The Matlow's Ophthalmo-genetics Laboratory , Assaf-Harofeh Medical Center , Zerifin , Israel.,b Department of Ophthalmology , Assaf-Harofeh Medical Center , Zerifin , Israel
| | - Isaac Avni
- a The Matlow's Ophthalmo-genetics Laboratory , Assaf-Harofeh Medical Center , Zerifin , Israel.,b Department of Ophthalmology , Assaf-Harofeh Medical Center , Zerifin , Israel.,c Sackler Faculty of Medicine , Tel Aviv University , Tel Aviv , Israel
| | - Yair Morad
- b Department of Ophthalmology , Assaf-Harofeh Medical Center , Zerifin , Israel.,c Sackler Faculty of Medicine , Tel Aviv University , Tel Aviv , Israel
| | - Chen Weiner
- a The Matlow's Ophthalmo-genetics Laboratory , Assaf-Harofeh Medical Center , Zerifin , Israel
| | - Adi Einan-Lifshitz
- b Department of Ophthalmology , Assaf-Harofeh Medical Center , Zerifin , Israel.,c Sackler Faculty of Medicine , Tel Aviv University , Tel Aviv , Israel
| | - Eran Pras
- a The Matlow's Ophthalmo-genetics Laboratory , Assaf-Harofeh Medical Center , Zerifin , Israel.,b Department of Ophthalmology , Assaf-Harofeh Medical Center , Zerifin , Israel.,c Sackler Faculty of Medicine , Tel Aviv University , Tel Aviv , Israel
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Tian Q, Li Y, Kousar R, Guo H, Peng F, Zheng Y, Yang X, Long Z, Tian R, Xia K, Lin H, Pan Q. A novel NHS mutation causes Nance-Horan Syndrome in a Chinese family. BMC MEDICAL GENETICS 2017; 18:2. [PMID: 28061824 PMCID: PMC5219716 DOI: 10.1186/s12881-016-0360-9] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Accepted: 12/02/2016] [Indexed: 11/21/2022]
Abstract
Background Nance-Horan Syndrome (NHS) (OMIM: 302350) is a rare X-linked developmental disorder characterized by bilateral congenital cataracts, with occasional dental anomalies, characteristic dysmorphic features, brachymetacarpia and mental retardation. Carrier females exhibit similar manifestations that are less severe than in affected males. Methods Here, we report a four-generation Chinese family with multiple affected individuals presenting Nance-Horan Syndrome. Whole-exome sequencing combined with RT-PCR and Sanger sequencing was used to search for a genetic cause underlying the disease phenotype. Results Whole-exome sequencing identified in all affected individuals of the family a novel donor splicing site mutation (NM_198270: c.1045 + 2T > A) in intron 4 of the gene NHS, which maps to chromosome Xp22.13. The identified mutation results in an RNA processing defect causing a 416-nucleotide addition to exon 4 of the mRNA transcript, likely producing a truncated NHS protein. Conclusions The donor splicing site mutation NM_198270: c.1045 + 2T > A of the NHS gene is the causative mutation in this Nance-Horan Syndrome family. This research broadens the spectrum of NHS gene mutations, contributing to our understanding of the molecular genetics of NHS. Electronic supplementary material The online version of this article (doi:10.1186/s12881-016-0360-9) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Qi Tian
- State Key Laboratory of Medical Genetics & School of Life Sciences, Central South University, Changsha, Hunan, China
| | - Yunping Li
- Department of Ophthalmology, The Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Rizwana Kousar
- State Key Laboratory of Medical Genetics & School of Life Sciences, Central South University, Changsha, Hunan, China.,Department of Biology, Allama Iqbal Open University, Islamabad, Pakistan
| | - Hui Guo
- State Key Laboratory of Medical Genetics & School of Life Sciences, Central South University, Changsha, Hunan, China
| | - Fenglan Peng
- ChangSha Health Vocational Collage, Changsha, Hunan, China
| | - Yu Zheng
- State Key Laboratory of Medical Genetics & School of Life Sciences, Central South University, Changsha, Hunan, China
| | - Xiaohua Yang
- Shenzhen Baoan District Maternal and Child Health Hospital, Shenzhen, Guangdong, China
| | - Zhigao Long
- State Key Laboratory of Medical Genetics & School of Life Sciences, Central South University, Changsha, Hunan, China
| | - Runyi Tian
- State Key Laboratory of Medical Genetics & School of Life Sciences, Central South University, Changsha, Hunan, China
| | - Kun Xia
- State Key Laboratory of Medical Genetics & School of Life Sciences, Central South University, Changsha, Hunan, China
| | - Haiying Lin
- Shenzhen Baoan District Maternal and Child Health Hospital, Shenzhen, Guangdong, China.
| | - Qian Pan
- State Key Laboratory of Medical Genetics & School of Life Sciences, Central South University, Changsha, Hunan, China.
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Gjørup H, Haubek D, Jacobsen P, Ostergaard JR. Nance-Horan syndrome-The oral perspective on a rare disease. Am J Med Genet A 2016; 173:88-98. [PMID: 27616609 DOI: 10.1002/ajmg.a.37963] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Accepted: 08/21/2016] [Indexed: 11/11/2022]
Abstract
The present study describes seven patients with Nance-Horan syndrome, all referred to a specialized oral care unit in the Central Denmark Region. A literature search on "Nance Horan Syndrome" resulted in 53 publications among which 29 reported on dental findings. Findings reported in these papers have been systematized to obtain an overview of the reported findings and the terminology on dental morphology. All seven patients included in the present study showed deviations of crown morphology on incisors and/or molars. The only consistent and very clear dental aberration was alterations in the tooth morphology that is screwdriver-shaped incisors and bud molars being most pronounced in the permanent dentition, but were also present in the primary dentition. In addition, three patients had supernumerary teeth, and three had dental agenesis. In conclusion, a dental examination as a part of the diagnostic process may reveal distinct characteristics of the dental morphology, which could be of diagnostic value and facilitate an early diagnosis. In the description of molar morphology in NHS patients, it is recommended to use the term "bud molar." The combination of congenital cataract, screwdriwer-shaped incisors and bud-shaped molars is a strong clinical indication of Nance-Horan syndrome. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Hans Gjørup
- Section of Oral Health in Rare Diseases, Department of Maxillofacial Surgery, Aarhus University Hospital, Aarhus, Denmark
| | - Dorte Haubek
- Section for Pediatric Dentistry, Department of Dentistry, Health, Aarhus University, Aarhus, Denmark
| | - Pernille Jacobsen
- Department of Specialized Oral Health Care, Viborg Regional Hospital, Central Jutland, Viborg, Denmark
| | - John R Ostergaard
- Center for Rare Diseases, Department of Pediatrics, Aarhus University Hospital, Aarhus, Denmark
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Subasioglu A, Savas S, Kucukyilmaz E, Kesim S, Yagci A, Dundar M. Genetic background of supernumerary teeth. Eur J Dent 2015; 9:153-158. [PMID: 25713500 PMCID: PMC4319293 DOI: 10.4103/1305-7456.149670] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Supernumerary teeth (ST) are odontostomatologic anomaly characterized by as the existence excessive number of teeth in relation to the normal dental formula. This condition is commonly seen with several congenital genetic disorders such as Gardner's syndrome, cleidocranial dysostosis and cleft lip and palate. Less common syndromes that are associated with ST are; Fabry Disease, Ellis-van Creveld syndrome, Nance-Horan syndrome, Rubinstein-Taybi Syndrome and Trico–Rhino–Phalangeal syndrome. ST can be an important component of a distinctive disorder and an important clue for early diagnosis. Certainly early detecting the abnormalities gives us to make correct management of the patient and also it is important for making well-informed decisions about long-term medical care and treatment. In this review, the genetic syndromes that are related with ST were discussed.
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Affiliation(s)
- Aslı Subasioglu
- Department of Medical Genetics, Izmir Katip Celebi University, Ataturk Training and Research Hospital, Izmir, Turkiye
| | - Selcuk Savas
- Department of Pedodontics, Dentistry Faculty, Izmir Katip Celebi University, Izmir, Turkiye
| | - Ebru Kucukyilmaz
- Department of Pedodontics, Dentistry Faculty, Izmir Katip Celebi University, Izmir, Turkiye
| | - Servet Kesim
- Department of Periodontology, Faculty of Dentistry, Erciyes University, Kayseri, Turkiye
| | - Ahmet Yagci
- Department of Orthodontics, Faculty of Dentistry, Erciyes University, Kayseri, Turkiye
| | - Munis Dundar
- Department of Medical Genetics, Medical Faculty, Erciyes University, Kayseri, Turkiye
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Li A, Li B, Wu L, Yang L, Chen N, Ma Z. Identification of a novel NHS mutation in a Chinese family with Nance-Horan syndrome. Curr Eye Res 2014; 40:434-8. [PMID: 25266737 DOI: 10.3109/02713683.2014.959606] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
PURPOSE To identiy the disease causing mutation in a Chinese family presenting with early-onset cataract and dental anomalies. MATERIALS AND METHODS A specific Hereditary Eye Disease Enrichment Panel (HEDEP) (personalized customization by MyGenostics, Baltimore, MD) based on targeted exome capture technology was used to collect the protein coding regions of 30 early-onset cataract associated genes, and high throughput sequencing was done with Illumina HiSeq 2000 platform. The identified variant was confirmed with Sanger sequencing. RESULTS A novel deletion in exon 4 (c.852delG) of NHS gene was identified; the identified 1 bp deletion altered the reading frame and was predicted to result in a premature stop codon after the addition of twelve novel amino acid (p.S285PfsX13). This mutation co-segregated in affected males and obligate female carriers, but was absent in 100 matched controls. CONCLUSIONS Our findings broaden the spectrum of NHS mutations causing Nance-Horan syndrome and phenotypic spectrum of the disease in Chinese patients.
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Affiliation(s)
- Aijun Li
- Key Laboratory of Vision Loss and Restoration, Ministry of Education, Peking University Eye Center, Peking University Third Hospital , Beijing , P. R. China
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Hong N, Chen YH, Xie C, Xu BS, Huang H, Li X, Yang YQ, Huang YP, Deng JL, Qi M, Gu YS. Identification of a novel mutation in a Chinese family with Nance-Horan syndrome by whole exome sequencing. J Zhejiang Univ Sci B 2014; 15:727-34. [PMID: 25091991 DOI: 10.1631/jzus.b1300321] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE Nance-Horan syndrome (NHS) is a rare X-linked disorder characterized by congenital nuclear cataracts, dental anomalies, and craniofacial dysmorphisms. Mental retardation was present in about 30% of the reported cases. The purpose of this study was to investigate the genetic and clinical features of NHS in a Chinese family. METHODS Whole exome sequencing analysis was performed on DNA from an affected male to scan for candidate mutations on the X-chromosome. Sanger sequencing was used to verify these candidate mutations in the whole family. Clinical and ophthalmological examinations were performed on all members of the family. RESULTS A combination of exome sequencing and Sanger sequencing revealed a nonsense mutation c.322G>T (E108X) in exon 1 of NHS gene, co-segregating with the disease in the family. The nonsense mutation led to the conversion of glutamic acid to a stop codon (E108X), resulting in truncation of the NHS protein. Multiple sequence alignments showed that codon 108, where the mutation (c.322G>T) occurred, was located within a phylogenetically conserved region. The clinical features in all affected males and female carriers are described in detail. CONCLUSIONS We report a nonsense mutation c.322G>T (E108X) in a Chinese family with NHS. Our findings broaden the spectrum of NHS mutations and provide molecular insight into future NHS clinical genetic diagnosis.
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Affiliation(s)
- Nan Hong
- Department of Ophthalmology, the First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou 310003, China; Beijing Genomics Institute (BGI)-Shenzhen, Shenzhen 518083, China; School of Basic Medical Sciences, Zhejiang University, Hangzhou 310058, China; Functional Genomics Center, Department of Pathology & Laboratory Medicine, University of Rochester Medical Center, West Henrietta, NY 14586, USA
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Sun W, Xiao X, Li S, Guo X, Zhang Q. Exome sequencing of 18 Chinese families with congenital cataracts: a new sight of the NHS gene. PLoS One 2014; 9:e100455. [PMID: 24968223 PMCID: PMC4072665 DOI: 10.1371/journal.pone.0100455] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Accepted: 05/23/2014] [Indexed: 01/21/2023] Open
Abstract
PURPOSE The aim of this study was to investigate the mutation spectrum and frequency of 34 known genes in 18 Chinese families with congenital cataracts. METHODS Genomic DNA and clinical data was collected from 18 families with congenital cataracts. Variations in 34 cataract-associated genes were screened by whole exome sequencing and then validated by Sanger sequencing. RESULTS Eleven candidate variants in seven of the 34 genes were detected by exome sequencing and then confirmed by Sanger sequencing, including two variants predicted to be benign and the other pathogenic mutations. The nine mutations were present in 9 of the 18 (50%) families with congenital cataracts. Of the four families with mutations in the X-linked NHS gene, no other abnormalities were recorded except for cataract, in which a pseudo-dominant inheritance form was suggested, as female carriers also had different forms of cataracts. CONCLUSION This study expands the mutation spectrum and frequency of genes responsible for congenital cataract. Mutation in NHS is a common cause of nonsyndromic congenital cataract with pseudo-autosomal dominant inheritance. Combined with our previous studies, a genetic basis could be identified in 67.6% of families with congenital cataracts in our case series, in which mutations in genes encoding crystallins, genes encoding connexins, and NHS are responsible for 29.4%, 14.7%, and 11.8% of families, respectively. Our results suggest that mutations in NHS are the common cause of congenital cataract, both syndromic and nonsyndromic.
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Affiliation(s)
- Wenmin Sun
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Xueshan Xiao
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Shiqiang Li
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Xiangming Guo
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
| | - Qingjiong Zhang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangzhou, China
- * E-mail:
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Wang SK, Choi M, Richardson AS, Reid BM, Lin BP, Wang SJ, Kim JW, Simmer JP, Hu JCC. ITGB6 loss-of-function mutations cause autosomal recessive amelogenesis imperfecta. Hum Mol Genet 2013; 23:2157-63. [PMID: 24305999 DOI: 10.1093/hmg/ddt611] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Integrins are cell-surface adhesion receptors that bind to extracellular matrices (ECM) and mediate cell-ECM interactions. Some integrins are known to play critical roles in dental enamel formation. We recruited two Hispanic families with generalized hypoplastic amelogenesis imperfecta (AI). Analysis of whole-exome sequences identified three integrin beta 6 (ITGB6) mutations responsible for their enamel malformations. The female proband of Family 1 was a compound heterozygote with an ITGB6 transition mutation in Exon 4 (g.4545G > A c.427G > A p.Ala143Thr) and an ITGB6 transversion mutation in Exon 6 (g.27415T > A c.825T > A p.His275Gln). The male proband of Family 2 was homozygous for an ITGB6 transition mutation in Exon 11 (g.73664C > T c.1846C > T p.Arg616*) and hemizygous for a transition mutation in Exon 6 of Nance-Horan Syndrome (NHS Xp22.13; g.355444T > C c.1697T > C p.Met566Thr). These are the first disease-causing ITGB6 mutations to be reported. Immunohistochemistry of mouse mandibular incisors localized ITGB6 to the distal membrane of differentiating ameloblasts and pre-ameloblasts, and then ITGB6 appeared to be internalized by secretory stage ameloblasts. ITGB6 expression was strongest in the maturation stage and its localization was associated with ameloblast modulation. Our findings demonstrate that early and late amelogenesis depend upon cell-matrix interactions. Our approach (from knockout mouse phenotype to human disease) demonstrates the power of mouse reverse genetics in mutational analysis of human genetic disorders and attests to the need for a careful dental phenotyping in large-scale knockout mouse projects.
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Affiliation(s)
- Shih-Kai Wang
- Department of Biologic and Materials Sciences, University of Michigan School of Dentistry, 1210 Eisenhower Place, Ann Arbor, MI 48108, USA
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