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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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Yu Y, Qiao Y, Ye Y, Luo C, Yao K. A novel single-base deletional mutation of MIP impairs protein distribution and cell-to-cell adhesion in autosomal dominant cataracts in a Chinese family. Am J Med Genet A 2024; 194:e63504. [PMID: 38153133 DOI: 10.1002/ajmg.a.63504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 11/24/2023] [Accepted: 12/01/2023] [Indexed: 12/29/2023]
Abstract
Congenital cataracts are the leading cause of irreversible visual disability in children, and genetic factors play an important role in their development. In this study, targeted exome sequencing revealed a novel single-base deletional mutation of MIP (c.301delG; p.Ala101Profs*16) segregated with congenital punctate cataract in a Chinese family. The hydrophobic properties, and secondary and tertiary structures for truncated MIP were predicted to affect the function of protein by bioinformatics analysis. When MIP-WT and MIP-Ala101fs expression constructs were singly transfected into HeLa cells, it was found that the mRNA level showed no significant difference, while the protein level of the mutant was remarkably reduced compared to that of the wild-type MIP. Immunofluorescence images showed that the MIP-WT was principally localized to the plasma membrane, whereas the MIP-Ala101fs protein was aberrantly trapped in the cytoplasm. Furthermore, the cell-to-cell adhesion capability and the cell-to-cell communication property were both significantly reduced for MIP-Ala101fs compared to the MIP-WT (all *p < 0.05). This is the first report of the c.301delG mutation in the MIP gene associated with autosomal dominant congenital cataracts. We propose that the cataract is caused by the decreased protein expression and reduced cell-to-cell adhesion by the mutant MIP. The impaired trafficking or instability of the mutant protein, as well as compromised intercellular communication is probably a concurrent result of the mutation. The results expand the genetic and phenotypic spectra of MIP and help to better understand the molecular basis of congenital cataracts.
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Affiliation(s)
- Yinhui Yu
- Eye Center, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Zhejiang Provincial Key Laboratory of Ophthalmology, Zhejiang Provincial Clinical Research Center for Eye Diseases, Zhejiang Provincial Engineering Institute on Eye Diseases, Hangzhou, China
| | - Yue Qiao
- Eye Center, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Zhejiang Provincial Key Laboratory of Ophthalmology, Zhejiang Provincial Clinical Research Center for Eye Diseases, Zhejiang Provincial Engineering Institute on Eye Diseases, Hangzhou, China
| | - Yang Ye
- Eye Center, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Zhejiang Provincial Key Laboratory of Ophthalmology, Zhejiang Provincial Clinical Research Center for Eye Diseases, Zhejiang Provincial Engineering Institute on Eye Diseases, Hangzhou, China
| | - Chenqi Luo
- Eye Center, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Zhejiang Provincial Key Laboratory of Ophthalmology, Zhejiang Provincial Clinical Research Center for Eye Diseases, Zhejiang Provincial Engineering Institute on Eye Diseases, Hangzhou, China
| | - Ke Yao
- Eye Center, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Zhejiang Provincial Key Laboratory of Ophthalmology, Zhejiang Provincial Clinical Research Center for Eye Diseases, Zhejiang Provincial Engineering Institute on Eye Diseases, Hangzhou, China
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Lin N, Zhang Y, Song X, Xu J, Luo C, Tian Q, Yao K, Wu W, Chen X, Hu L. Cataract-causing mutations S78F and S78P of γD-crystallin decrease protein conformational stability and drive aggregation. Int J Biol Macromol 2023; 253:126910. [PMID: 37739288 DOI: 10.1016/j.ijbiomac.2023.126910] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2023] [Revised: 08/28/2023] [Accepted: 09/13/2023] [Indexed: 09/24/2023]
Abstract
Congenital cataract is the leading cause of childhood blindness, which primarily results from genetic factors. γD-crystallin is the most abundant γ-crystallin and is essential for maintaining lens transparency and refractivity. Numerous mutations in γD-crystallin have been reported with unclear pathogenic mechanism. Two different cataract-causing mutations Ser78Phe and Ser78Pro in γD-crystallin were previously identified at the same conserved Ser78 residue. In this work, firstly, we purified the mutants and characterized for the structural change using fluorescence spectroscopy, circular dichroism (CD) spectroscopy, and size-exclusion chromatography (SEC). Both mutants were prone to form insoluble precipitates when expressed in Escherichia coli strain BL21 (DE3) cells. Compared with wild-type (WT), both mutations caused structural disruption, increased hydrophobic exposure, decreased solubility, and reduced thermal stability. Next, we investigated the aggregation of the mutants at the cellular level. Overexpression the mutants in HLE-B3 and HEK 293T cells could induce aggresome formations. The environmental stresses (including heat, ultraviolet irradiation and oxidative stress) promoted the formation of aggregates. Moreover, the intracellular S78F and S78P aggregates could be reversed by lanosterol. Molecular dynamic simulation indicated that both mutations disrupted the structural integrity of Greek-key motif 2. Hence, our results reveal the vital role of conserved Ser78 in maintaining the structural stability, which can offer new insights into the mechanism of cataract formation.
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Affiliation(s)
- Ningqin Lin
- Department of Nephrology, The Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, Zhejiang Province, China; Eye Center of the Second Affiliated Hospital, Zhejiang University School of Medicine, 88 Jiefang Road, Hangzhou 310009, China; Institute of Translational Medicine, Zhejiang University School of Medicine, 268 Kaixuan Road, Hangzhou 310020, China
| | - Ying Zhang
- Eye Center of the Second Affiliated Hospital, Zhejiang University School of Medicine, 88 Jiefang Road, Hangzhou 310009, China; Institute of Translational Medicine, Zhejiang University School of Medicine, 268 Kaixuan Road, Hangzhou 310020, China
| | - Xiaohui Song
- Eye Center of the Second Affiliated Hospital, Zhejiang University School of Medicine, 88 Jiefang Road, Hangzhou 310009, China
| | - Jingjie Xu
- Eye Center of the Second Affiliated Hospital, Zhejiang University School of Medicine, 88 Jiefang Road, Hangzhou 310009, China
| | - Chenqi Luo
- Eye Center of the Second Affiliated Hospital, Zhejiang University School of Medicine, 88 Jiefang Road, Hangzhou 310009, China
| | - Qing Tian
- Eye Center of the Second Affiliated Hospital, Zhejiang University School of Medicine, 88 Jiefang Road, Hangzhou 310009, China; Institute of Translational Medicine, Zhejiang University School of Medicine, 268 Kaixuan Road, Hangzhou 310020, China
| | - Ke Yao
- Eye Center of the Second Affiliated Hospital, Zhejiang University School of Medicine, 88 Jiefang Road, Hangzhou 310009, China
| | - Wei Wu
- Eye Center of the Second Affiliated Hospital, Zhejiang University School of Medicine, 88 Jiefang Road, Hangzhou 310009, China.
| | - Xiangjun Chen
- Eye Center of the Second Affiliated Hospital, Zhejiang University School of Medicine, 88 Jiefang Road, Hangzhou 310009, China; Institute of Translational Medicine, Zhejiang University School of Medicine, 268 Kaixuan Road, Hangzhou 310020, China.
| | - Lidan Hu
- Department of Nephrology, The Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou, Zhejiang Province, China.
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Wang H, Ouyang G, Zhu Y. D348N Mutation of BFSP1 Gene in Congenital Cataract: it Does Matter. Cell Biochem Biophys 2023; 81:757-763. [PMID: 37667037 DOI: 10.1007/s12013-023-01169-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/18/2023] [Indexed: 09/06/2023]
Abstract
Beaded filament structural protein 1 (BFSP1) gene plays important role in the development of congenital cataract. We aimed to investigate and analyze the molecular mechanism of congenital cataract caused by D348N mutation of BFSP1 gene, and to provide evidence for the intervention of congenital cataract. BFSP1 and CP49 genes were cloned, wild type and mutant expression plasmids of BFSP1 were constructed and transfected into 293T cells. The BFSP1 wild type and mutant (D348N) gene sequence (NM_001195) were constructed into pEGFP-N1 vector by the restriction site NheI/KpnI. The effect of mutation on cell proliferation and apoptosis was analyzed. There was no significant change between the expression site of BFSP1 D348N mutation and the wild type. The expression of BFSP1 protein in wild group was higher than that in mutant group. CCK8 detection showed that the proliferation ability of 293T cells in mutant group was weaker than that in BFSP1 group. The mutation led to an increase in apoptosis. BFSP1 mutation significantly decreases the expression of BFSP1 protein, weakened the ability of cell proliferation and increased apoptosis. BFSP1 D348N mutation may be closely associated with congenital cataract and is of great significance to the investigations of the mechanism and intervention of congenital cataract.
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Affiliation(s)
- Han Wang
- Department of Ophthalmology, Dalian No.3 People's Hospital, Dalian, China.
| | - Gaoxiang Ouyang
- Department of Ophthalmology, Dalian No.3 People's Hospital, Dalian, China
| | - Ying Zhu
- Department of Ophthalmology, Dalian No.3 People's Hospital, Dalian, China.
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Tan Y, Jiang W, Hu LY, Shen YY, Chen H, Zou YS, Luo LX, Jin GM, Liu ZZ. Hotspots and frontiers of genetic research on pediatric cataracts from 2013 to 2022: a scientometric analysis. Int J Ophthalmol 2023; 16:1682-1691. [PMID: 37854365 PMCID: PMC10559021 DOI: 10.18240/ijo.2023.10.19] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Accepted: 08/02/2023] [Indexed: 10/20/2023] Open
Abstract
AIM To explore the hotspots and frontiers of genetic research on pediatric cataracts. METHODS Global publications from 2013 to 2022 related to genes in pediatric cataracts were extracted from the Web of Science Core Collection, and were analyzed in terms of the publication counts, countries, journals, authors, keywords, cited references, subject categories, and the underlying hotspots and frontiers. RESULTS Totally 699 publications were included in the final analysis. The predominant actors were identified, with China (n=240) and PLoS One (n=33) being the most productive country and journal respectively. The research hotspots extracted from keywords were crystallin gene mutations, pathogenicity evaluation, phenotypes of ocular and neurodevelopmental abnormalities, genes encoding membrane proteins, and diagnosis of multisystemic disorders. The co-cited articles formed 10 clusters of research topics, including FYCO1 (56 items), mutation screening (43 items), gap junction (29 items), the Warburg Micro syndrome (29 items), ephrin-A5 (28 items), novel mutation (24 items), eye development and function (22 items), cholestanol (7 items), OCRL (6 items), and pathogenicity prediction (3 items). The research frontiers were FYCO1, ephrin-A5, and cholestanol. Cell biology showed the strongest bridging effects among different disciplines in the field (betweenness centrality=0.44). CONCLUSION With the progress in next-generation sequencing and multidisciplinary collaboration, genetic research on pediatric cataracts broadens the knowledge scope of the crystalline lens, as well as other organs and systems, shedding light on the molecular mechanisms of systemic diseases. Cell biology may integrate multidisciplinary content to address cutting-edge issues in the field.
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Affiliation(s)
- Yuan Tan
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou 510060, Guangdong Province, China
| | - Wei Jiang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou 510060, Guangdong Province, China
- Zhongshan Medical School, Sun Yat-sen University, Guangzhou 510060, Guangdong Province, China
| | - Le-Yi Hu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou 510060, Guangdong Province, China
| | - Yan-Yu Shen
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou 510060, Guangdong Province, China
| | - Hui Chen
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou 510060, Guangdong Province, China
| | - Ying-Shi Zou
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou 510060, Guangdong Province, China
| | - Li-Xia Luo
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou 510060, Guangdong Province, China
| | - Guang-Ming Jin
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou 510060, Guangdong Province, China
| | - Zhen-Zhen Liu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou 510060, Guangdong Province, China
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Brandt JD, Shankar SP. Glaucoma Following Cataract Surgery in Children-Finally, a Clue. JAMA Ophthalmol 2023; 141:880-881. [PMID: 37590009 DOI: 10.1001/jamaophthalmol.2023.3804] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/18/2023]
Affiliation(s)
- James D Brandt
- Department of Ophthalmology & Vision Science, University of California, Davis School of Medicine, Sacramento
| | - Suma P Shankar
- Department of Pediatrics, University of California, Davis School of Medicine, Sacramento
- Department of Ophthalmology, University of California, Davis School of Medicine, Sacramento
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Ullah MI, Rehman Z, Dad R, Alsrhani A, Shakil M, Ghanem HB, Alameen AAM, Elsadek MF, Eltayeb LB, Ullah S, Atif M. Identification and Functional Characterization of Mutation in FYCO1 in Families with Congenital Cataract. Life (Basel) 2023; 13:1788. [PMID: 37629644 PMCID: PMC10456301 DOI: 10.3390/life13081788] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2023] [Revised: 08/10/2023] [Accepted: 08/18/2023] [Indexed: 08/27/2023] Open
Abstract
Congenital cataract (CC) causes a third of the cases of treatable childhood blindness worldwide. CC is a disorder of the crystalline lens which is established as clinically divergent and has complex heterogeneity. This study aimed to determine the genetic basis of CC. Whole blood was obtained from four consanguineous families with CC. Genomic DNA was extracted from the blood, and the combination of targeted and Sanger sequencing was used to identify the causative gene. The mutations detected were analyzed in silico for structural and protein-protein interactions to predict their impact on protein activities. The sequencing found a known FYCO1 mutation (c.2206C>T; p.Gln736Term) in autosomal recessive mode in families with CC. Co-segregation analysis showed affected individuals as homozygous and carriers as heterozygous for the mutation and the unaffected as wild-type. Bioinformatics tools uncovered the loss of the Znf domain and structural compactness of the mutant protein. In conclusion, a previously reported nonsense mutation was identified in four consanguineous families with CC. Structural analysis predicted the protein as disordered and coordinated with other structural proteins. The autophagy process was found to be significant for the development of the lens and maintenance of its transparency. The identification of these markers expands the scientific knowledge of CC; the future goal should be to understand the mechanism of disease severity. Ascertaining the genetic etiology of CC in a family member facilitates establishing a molecular diagnosis, unlocks the prospect of prenatal diagnosis in pregnancies, and guides the successive generations by genetic counseling.
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Affiliation(s)
- Muhammad Ikram Ullah
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Jouf University, Sakaka 72388, Saudi Arabia; (A.A.); (H.B.G.); (A.A.M.A.); (M.A.)
| | - Zaira Rehman
- Department of Pathology, Indus Hospital & Health Network, Karachi 75190, Pakistan;
| | - Rubina Dad
- Structure Biology Research Centre, Human Technopole, 20157 Milan, Italy
| | - Abdullah Alsrhani
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Jouf University, Sakaka 72388, Saudi Arabia; (A.A.); (H.B.G.); (A.A.M.A.); (M.A.)
| | - Muhammad Shakil
- Department of Biochemistry, King Edward Medical University, Lahore 54600, Pakistan;
- Department of Biochemistry, University of Health Sciences, Lahore 54600, Pakistan
| | - Heba Bassiony Ghanem
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Jouf University, Sakaka 72388, Saudi Arabia; (A.A.); (H.B.G.); (A.A.M.A.); (M.A.)
| | - Ayman Ali Mohammed Alameen
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Jouf University, Sakaka 72388, Saudi Arabia; (A.A.); (H.B.G.); (A.A.M.A.); (M.A.)
| | - Mohamed Farouk Elsadek
- Department of Community Health Sciences, College of Applied Medical Sciences, King Saud University, Riyadh 11433, Saudi Arabia;
| | - Lienda Bashier Eltayeb
- Department of Medical Laboratory Sciences, College of Applied Medical Sciences, Prince Sattam Bin Abdul-Aziz University, Al-Kharj, Riyadh 11942, Saudi Arabia;
| | - Sajjad Ullah
- University Institute of Medical Laboratory Technology, Faculty of Allied Health Sciences, The University of Lahore, Lahore 54600, Pakistan;
| | - Muhammad Atif
- Department of Clinical Laboratory Sciences, College of Applied Medical Sciences, Jouf University, Sakaka 72388, Saudi Arabia; (A.A.); (H.B.G.); (A.A.M.A.); (M.A.)
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Wang KJ, Wang JX, Wang JD, Li M, Zhang JS, Mao YY, Wan XH. Congenital coralliform cataract is the predominant consequence of a recurrent mutation in the CRYGD gene. Orphanet J Rare Dis 2023; 18:200. [PMID: 37480084 PMCID: PMC10362579 DOI: 10.1186/s13023-023-02816-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 07/08/2023] [Indexed: 07/23/2023] Open
Abstract
BACKGROUND Congenital cataract is a leading cause of treatable childhood blindness and both clinically and genetically heterogeneous. Among the already characterized phenotypes, coralliform cataract is a rare special form of congenital cataracts. Although previous studies had shown that mutations in the γD-crystallin (CRYGD) can result in congenital coralliform cataracts, no conclusive genotype-phenotype correlation might be drawn. Here we aimed to identify the spectrum and frequency of CRYGD gene mutations in congenital coralliform cataracts of Chinese origin. METHODS The medical records of 392 Chinese families with congenital cataracts were reviewed between January 2011 and December 2021. The families, clinically documented to have congenital coralliform cataracts, were screened for mutations in candidate CRYGD gene. The genomic DNA of all subjects was extracted from peripheral blood leukocytes. PCR amplified and direct sequencing were performed to identify the disease-causing mutation. RESULTS A total of 12 families with coralliform cataracts were recruited in this study in the past 10 years, accounting for 3.1% of the families with congenital cataracts. Of the 12 families, all affected individuals presented with bilateral non-progressive coralliform cataracts since birth, with the best-corrected Snellen visual acuities ranging from 20/200 to 20/25. A recurrent c.70 C > A (p. P24T) mutation in CRYGD was identified in 10 families (83.3%) with congenital cataract, which co-segregated with all affected individuals and was not observed in unaffected family members or ethnically matched normal controls. CONCLUSIONS The coralliform cataract is characterized by being bilateral, non-progressive and present at birth. A recurrent p.P24T CRYGD mutation occurs independently in 83.3% of the Chinese families with congenital coralliform cataracts and most likely represents a mutational hot spot, which underscore the relations between coralliform cataract and p.P24T CRYGD.
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Affiliation(s)
- Kai-Jie Wang
- Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology & Visual Sciences Key Lab, 100730, Beijing, China
| | - Jue-Xue Wang
- Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology & Visual Sciences Key Lab, 100730, Beijing, China
| | - Jin-Da Wang
- Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology & Visual Sciences Key Lab, 100730, Beijing, China
| | - Meng Li
- Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology & Visual Sciences Key Lab, 100730, Beijing, China
| | - Jing-Shang Zhang
- Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology & Visual Sciences Key Lab, 100730, Beijing, China
| | - Ying-Yan Mao
- Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology & Visual Sciences Key Lab, 100730, Beijing, China
| | - Xiu-Hua Wan
- Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology & Visual Sciences Key Lab, 100730, Beijing, China.
- NO.1 Dong Jiao Min Xiang, 100730, Beijing, China.
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Neuhann TM, Neuhann L. [Human genetic diagnostics in hereditary eye diseases : What does the ophthalmologist need to know]. DIE OPHTHALMOLOGIE 2023:10.1007/s00347-023-01878-6. [PMID: 37266672 DOI: 10.1007/s00347-023-01878-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Accepted: 04/28/2023] [Indexed: 06/03/2023]
Abstract
Hereditary eye disorders can affect all ocular structures and can be accompanied by structural malformations (e.g. coloboma) or functional disorders (e.g. retinal dystrophy). Ocular phenotypes can also be the presenting symptom of many complex syndromic disorders. The majority of hereditary eye disorders are extremely heterogeneous but can be routinely diagnosed by modern high-throughput sequencing technologies. Molecular testing is highly important not only in in the evaluation of differential diagnoses but is also of increasing relevance due to individual treatment options.
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Affiliation(s)
- Teresa M Neuhann
- MGZ - Medizinisch genetisches Zentrum, Bayerstr. 3-5, 80335, München, Deutschland.
| | - Lukas Neuhann
- MVZ Prof. Neuhann, Helene-Weber-Allee 19, 80637, München, Deutschland
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Tan Y, Chen H, Gong S, Zou Y, Shen Y, Luo L, Jin G, Liu Z. Evolution and trends of childhood cataract research in the past 10 years: A scientometric analysis. Heliyon 2023; 9:e17590. [PMID: 37416629 PMCID: PMC10320269 DOI: 10.1016/j.heliyon.2023.e17590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2023] [Revised: 06/19/2023] [Accepted: 06/21/2023] [Indexed: 07/08/2023] Open
Abstract
Purpose To present a panoramic review of childhood cataract knowledge networks, hotspots and trends. Methods The Web of Science Core Collection was used to retrieve the global literature on childhood cataract published between 2012 and 2021. Scientometric data were analyzed and visualized using VOSviewer and CiteSpace for metrics including publication count, citation count, country, journal, author, cited reference, subject category and their temporal trends. Results A total of 3395 analyzed publications showed an inconsistent annual increasing trend. The USA (n = 939) was the leading contributor among countries. The Journal of American Association for Pediatric Ophthalmology and Strabismus (n = 113) had the highest number of publications among journals. Eight clusters of author collaboration network including 183 authors were identified. Gene mutation, cataract surgery management, intraocular lens implantation complications, prevalence, and glaucoma were identified as the research hotspots. Pediatric cataract surgery, new mutations, artificial intelligence, and cerebrotendinous xanthomatosis were identified as frontier research topics. "Biochemistry and molecular biology", "neurosciences", and "radiology, nuclear medicine and medical imaging" had the highest betweenness centrality values (0.38, 0.32, and 0.22). Multidisciplinary (burst years: 2020 to 2021; strength = 4.32) had the greatest strength as of 2021. Conclusions Childhood cataract research intensely focuses on revealing the genetic background and pheno-spectrum of the diseases, innovating and/or optimizing surgical techniques, and preventing and treating postoperative complications. Artificial intelligence has shed light on the diagnosis and treatment of childhood cataracts. The advance in the research on molecular mechanisms of childhood cataracts depends on multidisciplinary cooperation.
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Affiliation(s)
- Yuan Tan
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou, 510060, China
| | - Hui Chen
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou, 510060, China
| | - Shaoyi Gong
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou, 510060, China
- Zhongshan Medical School, Sun Yat-sen University, Guangzhou, China
| | - Yingshi Zou
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou, 510060, China
| | - Yanyu Shen
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou, 510060, China
| | - Lixia Luo
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou, 510060, China
| | - Guangming Jin
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou, 510060, China
| | - Zhenzhen Liu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, Guangdong Provincial Key Laboratory of Ophthalmology and Visual Science, Guangdong Provincial Clinical Research Center for Ocular Diseases, Guangzhou, 510060, China
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11
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Theophanous CN, Wolfgeher DJ, Farooq AV, Hilkert Rodriguez S. Biomarkers of Pediatric Cataracts: A Proteomics Analysis of Aqueous Fluid. Int J Mol Sci 2023; 24:ijms24109040. [PMID: 37240389 DOI: 10.3390/ijms24109040] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2023] [Revised: 05/13/2023] [Accepted: 05/15/2023] [Indexed: 05/28/2023] Open
Abstract
Cataracts are among the most common causes of childhood vision loss worldwide. This study seeks to identify differentially expressed proteins in the aqueous humor of pediatric cataract patients. Samples of aqueous humor were collected from pediatric and adult cataract patients and subjected to mass spectrometry-based proteomic analysis. Samples of pediatric cataracts were grouped by subtype and compared to adult samples. Differentially expressed proteins in each subtype were identified. Gene ontology analysis was performed using WikiPaths for each cataract subtype. Seven pediatric patients and ten adult patients were included in the study. Of the pediatric samples, all seven (100%) were male, three (43%) had traumatic cataracts, two (29%) had congenital cataracts, and two (29%) had posterior polar cataracts. Of the adult patients, seven (70%) were female and seven (70%) had predominantly nuclear sclerotic cataracts. A total of 128 proteins were upregulated in the pediatric samples, and 127 proteins were upregulated in the adult samples, with 75 proteins shared by both groups. Gene ontology analysis identified inflammatory and oxidative stress pathways as upregulated in pediatric cataracts. Inflammatory and oxidative stress mechanisms may be involved in pediatric cataract formation and warrant further investigation.
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Affiliation(s)
- Christos N Theophanous
- Department of Ophthalmology and Visual Science, University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Donald J Wolfgeher
- Department of Molecular Genetics and Cell Biology, University of Chicago, Chicago, IL 60637, USA
| | - Asim V Farooq
- Department of Ophthalmology and Visual Science, University of Chicago Medical Center, Chicago, IL 60637, USA
| | - Sarah Hilkert Rodriguez
- Department of Ophthalmology and Visual Science, University of Chicago Medical Center, Chicago, IL 60637, USA
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12
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Shanbagh S, Matalia J, Kannan R, Shetty R, Panmand P, Muthu SO, Chaurasia SS, Deshpande V, Bhattacharya SS, Gopalakrishnan AV, Ghosh A. Distinct gene expression profiles underlie morphological and etiological differences in pediatric cataracts. Indian J Ophthalmol 2023; 71:2143-2151. [PMID: 37203095 PMCID: PMC10391435 DOI: 10.4103/ijo.ijo_3269_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/20/2023] Open
Abstract
Purpose Pediatric cataract is a major cause of preventable childhood blindness worldwide. Although genetic mutations or infections have been described in patients, the mechanistic basis of human cataract development remains poorly understood. Therefore, gene expression of structural, developmental, profibrotic, and transcription factors in phenotypically and etiologically distinct forms of pediatric cataracts were evaluated. Methods This cross-sectional study included 89 pediatric cataract subjects subtyped into 1) prenatal infectious (cytomegalovirus, rubella, and combined cytomegalovirus with rubella infection), 2) prenatal non-infectious, 3) posterior capsular anomalies, 4) postnatal, 5) traumatic, and 6) secondary, and compared to clear, non-cataractous material of eyes with the subluxated lenses. Expression of lens structure-related genes (Aqp-0, HspA4/Hsp70, CrygC), transcription factors (Tdrd7, FoxE3, Maf, Pitx 3) and profibrotic genes (Tgfβ, Bmp7, αSmA, vimentin) in surgically extracted cataract lens material were studied and correlated clinically. Results In cataract material, the lens-related gene expression profiles were uniquely associated with phenotype/etiology of different cataracts. Postnatal cataracts showed a significantly altered FoxE3 expression. Low levels of Tdrd7 expression correlated with posterior subcapsular opacity, whereas CrygC correlated significantly with anterior capsular ruptures. The expression of Aqp0 and Maf was elevated in infectious cataracts, particularly in CMV infections, compared to other cataract subtypes. Tgfβ showed significantly low expression in various cataract subtypes, whereas vimentin had elevated gene expression in infectious and prenatal cataracts. Conclusion A significant association between lens gene expression patterns in phenotypically and etiologically distinct subtypes of pediatric cataracts suggests regulatory mechanisms in cataractogenesis. The data reveal that cataract formation and presentation is a consequence of altered expression of a complex network of genes.
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Affiliation(s)
- Shaika Shanbagh
- GROW Research Laboratory, Narayana Nethralaya Foundation, Bengaluru, Karnataka; Department of Integrative Biology, School of Bio Sciences and Technology, Vellore Institute of Technology, Vellore, Tamil Nadu, India
| | - Jyoti Matalia
- Department of Paediatric Ophthalmology and Strabismus, Narayana Nethralaya, Bengaluru, Karnataka, India
| | - Ramaraj Kannan
- GROW Research Laboratory, Narayana Nethralaya Foundation, Bengaluru, Karnataka, India
| | - Rohit Shetty
- Cornea and Refractive Services, Narayana Nethralaya, Bengaluru, Karnataka, India
| | - Pratibha Panmand
- Department of Paediatric Ophthalmology and Strabismus, Narayana Nethralaya, Bengaluru, Karnataka, India
| | - Sumitha O Muthu
- Department of Paediatric Ophthalmology and Strabismus, Narayana Nethralaya, Bengaluru, Karnataka, India
| | - Shyam S Chaurasia
- Department of Ophthalmology and Visual Sciences, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Vrushali Deshpande
- GROW Research Laboratory, Narayana Nethralaya Foundation, Bengaluru, Karnataka, India
| | - Shomi S Bhattacharya
- GROW Research Laboratory, Narayana Nethralaya Foundation, Bengaluru, Karnataka, India; Institute of Ophthalmology, University College London, London, UK
| | - Abilash V Gopalakrishnan
- Department of Integrative Biology, School of Bio Sciences and Technology, Vellore Institute of Technology, Vellore, Tamil Nadu, India
| | - Arkasubhra Ghosh
- GROW Research Laboratory, Narayana Nethralaya Foundation, Bengaluru, Karnataka, India
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13
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A tapt1 knock-out zebrafish line with aberrant lens development and impaired vision models human early-onset cataract. Hum Genet 2023; 142:457-476. [PMID: 36697720 DOI: 10.1007/s00439-022-02518-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Accepted: 12/19/2022] [Indexed: 01/27/2023]
Abstract
Bi-allelic mutations in the gene coding for human trans-membrane anterior-posterior transformation protein 1 (TAPT1) result in a broad phenotypic spectrum, ranging from syndromic disease with severe skeletal and congenital abnormalities to isolated early-onset cataract. We present here the first patient with a frameshift mutation in the TAPT1 gene, resulting in both bilateral early-onset cataract and skeletal abnormalities, in addition to several dysmorphic features, in this way further expanding the phenotypic spectrum associated with TAPT1 mutations. A tapt1a/tapt1b double knock-out (KO) zebrafish model generated by CRISPR/Cas9 gene editing revealed an early larval phenotype with eye malformations, loss of vision, increased photokinetics and hyperpigmentation, without visible skeletal involvement. Ultrastructural analysis of the eyes showed a smaller condensed lens, loss of integrity of the lens capsule with formation of a secondary lens and hyperplasia of the cells in the ganglion and inner plexiform layers of the retina. Transcriptomic analysis pointed to an impaired lens development with aberrant expression of many of the crystallin and other lens-specific genes. Furthermore, the phototransduction and visual perception pathways were found to be significantly disturbed. Differences in light perception are likely the cause of the increased dark photokinetics and generalized hyperpigmentation observed in this zebrafish model. In conclusion, this study validates TAPT1 as a new gene for early-onset cataract and sheds light on its ultrastructural and molecular characteristics.
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14
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Xiao J, Jin S, Wang X, Huang J, Zou H. CELF1 Selectively Regulates Alternative Splicing of DNA Repair Genes Associated With Cataract in Human Lens Cell Line. Biochem Genet 2022:10.1007/s10528-022-10324-2. [PMID: 36585568 DOI: 10.1007/s10528-022-10324-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2022] [Accepted: 12/16/2022] [Indexed: 12/31/2022]
Abstract
Cataract is a global eye disease caused by the opacification of lens, while its underlying molecular pathogenesis is not clear, making it difficult for prevention. CELF1, an RNA binding protein, mediates Alternative Splicing (AS) of genes involved in diverse diseases and regulates development or defects of lens. Utilizing transcriptome-wide approaches, we analyzed and compared AS patterns between human lens epithelial cells (SRA01/04) with CELF1 overexpression (CELF1-OE) and control cells. Extensive changes in AS patterns upon CELF1-OE were identified in SRA01/04 cells. We finally identified 840 CELF1-regulated AS events (RASEs) and found that CELF1-OE preferred to repress exon skipping events in SRA01/04 cells. CELF1-regulated AS genes were enriched in the regulation of DNA repair, cellular response to DNA damage stimulus, and apoptosis pathways (including HMGA2, CSNK1E, and YAP1). These biological functions and pathways have been reported to be associated with lens development or other eye diseases. To further explore the mechanisms of CELF1 in regulating AS genes, we downloaded and re-analyzed a set of CELF1-RNA interactome data. We found that 194 genes were bound and regulated by CELF1 at the AS level. 10 genes involved in DNA repair-related pathways were also bound by CELF1. Motif analysis for CELF1-bound peaks and splicing sites of RASEs showed that CELF1 regulates AS by binding to the AGGU[AG]AG motif in SRA01/04 cells. CELF1 could mediate AS of DNA repair-related genes through directly binding to their transcripts with distinct motif bias. The functional mechanism of CELF1 may ultimately participate in cataract formation and lens development.
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Affiliation(s)
- Jun Xiao
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun, China
| | - Siyan Jin
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun, China
| | - Xue Wang
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun, China
| | - Ju Huang
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun, China
| | - He Zou
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun, China.
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15
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Zheng Y, Li L, Wang L, Zhang C. Prenatal ultrasound findings of X-linked congenital cataracts: case report and description of a novel variant. Am J Transl Res 2022; 14:9066-9071. [PMID: 36628231 PMCID: PMC9827286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Accepted: 12/06/2022] [Indexed: 01/12/2023]
Abstract
Congenital cataracts, an important cause of permanent visual loss in children, are predominantly caused by hereditary factors. Genetic variants reportedly cause approximately 50% of congenital cataracts. The literature mainly describes cases of autosomal dominant inheritance diagnosed after birth, and minimal information is available concerning the prenatal diagnosis of X-linked congenital cataracts. Prenatal ultrasound is the primary method for diagnosis of congenital cataracts, whereas the diagnostic value of prenatal genetic testing remains controversial; however, such testing is reportedly essential for determination of disease etiology. Here, we describe a 33-year-old multigravida woman with a singleton pregnancy who was referred to our center at 24 weeks for routine prenatal examination; ultrasound imaging revealed bilateral cataracts in the male fetus. Genetic testing revealed a pathogenic variant in exon 11 of the OCRL inositol polyphosphate-5-phosphatase (OCRL) gene in the fetal sample, with the potential to cause the X-linked recessive genetic disease Dent disease 2 (Online Mendelian Inheritance in Man [OMIM]: 300555) or the X-linked recessive genetic disorder Lowe's syndrome (OMIM: 309000). We provide a comprehensive family history and our findings in a gross examination of the stillborn fetus. So, ultrasound imaging provides important information that can guide the diagnosis of congenital cataracts. When congenital cataracts are detected by prenatal ultrasound, a detailed family history should be obtained. We recommend genetic testing of the fetus and the family members to determine the etiology.
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16
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Pitfalls of whole exome sequencing in undefined clinical conditions with a suspected genetic etiology. Genes Genomics 2022; 45:637-655. [PMID: 36454368 DOI: 10.1007/s13258-022-01341-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2022] [Accepted: 10/26/2022] [Indexed: 12/03/2022]
Abstract
BACKGROUND Whole-Exome Sequencing (WES) is a valuable tool for the molecular diagnosis of patients with a suspected genetic condition. In complex and heterogeneous diseases, the interpretation of WES variants is more challenging given the absence of diagnostic handles and other reported cases with overlapping clinical presentations. OBJECTIVE To describe candidate variants emerging from trio-WES and possibly associated with the clinical phenotype in clinically heterogeneous conditions. METHODS We performed WES in ten patients from eight families, selected because of the lack of a clear clinical diagnosis or suspicion, the presence of multiple clinical signs, and the negative results of traditional genetic tests. RESULTS Although we identified ten candidate variants, reaching the diagnosis of these cases is challenging, given the complexity and the rarity of these syndromes and because affected genes are already associated with known genetic diseases only partially recapitulating patients' phenotypes. However, the identification of these variants could shed light into the definition of new genotype-phenotype correlations. Here, we describe the clinical and molecular data of these cases with the aim of favoring the match with other similar cases and, hopefully, confirm our diagnostic hypotheses. CONCLUSION This study emphasizes the major limitations associated with WES data interpretation, but also highlights its clinical utility in unraveling novel genotype-phenotype correlations in complex and heterogeneous undefined clinical conditions with a suspected genetic etiology.
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17
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Berry V, Fujinami K, Mochizuki K, Iwata T, Pontikos N, Quinlan RA, Michaelides M. A recurrent variant in LIM2 causes an isolated congenital sutural/lamellar cataract in a Japanese family. Ophthalmic Genet 2022; 43:622-626. [PMID: 35736209 PMCID: PMC9612932 DOI: 10.1080/13816810.2022.2090010] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background Genetically determined cataract is both clinically and molecularly highly heterogeneous. Here, we have identified a heterozygous variant in the lens integral membrane protein LIM2, the second most abundant protein in the lens, responsible for congenital sutural/lamellar cataract in a three-generation Japanese family. Methods Whole exome sequencing (WES) was undertaken in one affected and one unaffected individual from a family with autosomal dominant congenital cataract to establish the underlying genetic basis. Results A recurrent missense variant LIM2: c.388C>T; p.R130C was identified and found to co-segregate with disease. In addition, one variant COL11A1:c.3788C>T of unknown significance (VUS) was also identified. Conclusions We report a variant in LIM2 causing an isolated autosomal-dominant congenital sutural/lamellar cataract in a Japanese family. This is the first report of a LIM2 variant in the Japanese population. Hence, we expand the mutation spectrum of LIM2 variants in different ethnic groups.
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Affiliation(s)
- Vanita Berry
- Department of Genetics, UCL Institute of Ophthalmology, University College London, London, UK.,Moorfields Eye Hospital NHS Foundation Trust, London, UK
| | - Kaoru Fujinami
- Department of Genetics, UCL Institute of Ophthalmology, University College London, London, UK.,Moorfields Eye Hospital NHS Foundation Trust, London, UK.,Laboratory of Visual Physiology, Division of Vision Research, National Institute of Sensory Organs, National Hospital Organization, Tokyo Medical Centre, Tokyo, Japan
| | - Kiyofumi Mochizuki
- Department of Ophthalmology, Gifu University Graduate School of Medicine, Gifu, Japan
| | - Takeshi Iwata
- Division of Molecular and Cellular Biology, National Institute of Sensory Organs, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Nikolas Pontikos
- Department of Genetics, UCL Institute of Ophthalmology, University College London, London, UK.,Moorfields Eye Hospital NHS Foundation Trust, London, UK
| | - Roy A Quinlan
- Department of Biosciences, University of Durham, Durham, UK
| | - Michel Michaelides
- Department of Genetics, UCL Institute of Ophthalmology, University College London, London, UK.,Moorfields Eye Hospital NHS Foundation Trust, London, UK
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18
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Berry V, Ionides A, Pontikos N, Moore AT, Quinlan RA, Michaelides M. Variants in PAX6, PITX3 and HSF4 causing autosomal dominant congenital cataracts. Eye (Lond) 2021; 36:1694-1701. [PMID: 34345029 PMCID: PMC9307513 DOI: 10.1038/s41433-021-01711-x] [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] [Received: 04/06/2021] [Revised: 07/15/2021] [Accepted: 07/16/2021] [Indexed: 11/09/2022] Open
Abstract
Background Lens development is orchestrated by transcription factors. Disease-causing variants in transcription factors and their developmental target genes are associated with congenital cataracts and other eye anomalies. Methods Using whole exome sequencing, we identified disease-causing variants in two large British families and one isolated case with autosomal dominant congenital cataract. Bioinformatics analysis confirmed these disease-causing mutations as rare or novel variants, with a moderate to damaging pathogenicity score, with testing for segregation within the families using direct Sanger sequencing. Results Family A had a missense variant (c.184 G>A; p.V62M) in PAX6 and affected individuals presented with nuclear cataract. Family B had a frameshift variant (c.470–477dup; p.A160R*) in PITX3 that was also associated with nuclear cataract. A recurrent missense variant in HSF4 (c.341 T>C; p.L114P) was associated with congenital cataract in a single isolated case. Conclusions We have therefore identified novel variants in PAX6 and PITX3 that cause autosomal dominant congenital cataract.
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Affiliation(s)
- Vanita Berry
- UCL Institute of Ophthalmology, University College London, London, UK. .,Moorfields Eye Hospital NHS Foundation Trust, London, UK.
| | - Alex Ionides
- Moorfields Eye Hospital NHS Foundation Trust, London, UK
| | - Nikolas Pontikos
- UCL Institute of Ophthalmology, University College London, London, UK.,Moorfields Eye Hospital NHS Foundation Trust, London, UK
| | | | - Roy A Quinlan
- School of Biological and Medical Sciences, University of Durham, Durham, UK
| | - Michel Michaelides
- UCL Institute of Ophthalmology, University College London, London, UK. .,Moorfields Eye Hospital NHS Foundation Trust, London, UK.
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19
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Jones JL, Corbett MA, Yeaman E, Zhao D, Gecz J, Gasperini RJ, Charlesworth JC, Mackey DA, Elder JE, Craig JE, Burdon KP. A 127 kb truncating deletion of PGRMC1 is a novel cause of X-linked isolated paediatric cataract. Eur J Hum Genet 2021; 29:1206-1215. [PMID: 33867527 PMCID: PMC8385038 DOI: 10.1038/s41431-021-00889-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 03/10/2021] [Accepted: 04/02/2021] [Indexed: 02/02/2023] Open
Abstract
Inherited paediatric cataract is a rare Mendelian disease that results in visual impairment or blindness due to a clouding of the eye's crystalline lens. Here we report an Australian family with isolated paediatric cataract, which we had previously mapped to Xq24. Linkage at Xq24-25 (LOD = 2.53) was confirmed, and the region refined with a denser marker map. In addition, two autosomal regions with suggestive evidence of linkage were observed. A segregating 127 kb deletion (chrX:g.118373226_118500408del) in the Xq24-25 linkage region was identified from whole-genome sequencing data. This deletion completely removed a commonly deleted long non-coding RNA gene LOC101928336 and truncated the protein coding progesterone receptor membrane component 1 (PGRMC1) gene following exon 1. A literature search revealed a report of two unrelated males with non-syndromic intellectual disability, as well as congenital cataract, who had contiguous gene deletions that accounted for their intellectual disability but also disrupted the PGRMC1 gene. A morpholino-induced pgrmc1 knockdown in a zebrafish model produced significant cataract formation, supporting a role for PGRMC1 in lens development and cataract formation. We hypothesise that the loss of PGRMC1 causes cataract through disrupted PGRMC1-CYP51A1 protein-protein interactions and altered cholesterol biosynthesis. The cause of paediatric cataract in this family is the truncating deletion of PGRMC1, which we report as a novel cataract gene.
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Affiliation(s)
- Johanna L. Jones
- grid.1009.80000 0004 1936 826XMenzies Institute for Medical Research, University of Tasmania, Hobart, TAS Australia
| | - Mark A. Corbett
- grid.1010.00000 0004 1936 7304Adelaide Medical School, Robinson Research Institute, University of Adelaide, Adelaide, SA Australia
| | - Elise Yeaman
- grid.1009.80000 0004 1936 826XMenzies Institute for Medical Research, University of Tasmania, Hobart, TAS Australia
| | - Duran Zhao
- grid.1009.80000 0004 1936 826XMenzies Institute for Medical Research, University of Tasmania, Hobart, TAS Australia
| | - Jozef Gecz
- grid.1010.00000 0004 1936 7304Adelaide Medical School, Robinson Research Institute, University of Adelaide, Adelaide, SA Australia
| | - Robert J. Gasperini
- grid.1009.80000 0004 1936 826XSchool of Medicine, University of Tasmania, Hobart, TAS Australia
| | - Jac C. Charlesworth
- grid.1009.80000 0004 1936 826XMenzies Institute for Medical Research, University of Tasmania, Hobart, TAS Australia
| | - David A. Mackey
- grid.1489.40000 0000 8737 8161Centre for Ophthalmology and Visual Science, University of Western Australia, Lions Eye Institute, Perth, WA Australia
| | - James E. Elder
- grid.1008.90000 0001 2179 088XDepartment of Paediatrics, University of Melbourne, Melbourne, VIC Australia
| | - Jamie E. Craig
- grid.1014.40000 0004 0367 2697Department of Ophthalmology, Flinders University, Bedford Park, SA Australia
| | - Kathryn P. Burdon
- grid.1009.80000 0004 1936 826XMenzies Institute for Medical Research, University of Tasmania, Hobart, TAS Australia ,grid.1014.40000 0004 0367 2697Department of Ophthalmology, Flinders University, Bedford Park, SA Australia
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20
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Ma A, Grigg JR, Flaherty M, Smith J, Minoche AE, Cowley MJ, Nash BM, Ho G, Gayagay T, Lai T, Farnsworth E, Hackett EL, Slater K, Wong K, Holman KJ, Jenkins G, Cheng A, Martin F, Brown NJ, Leighton SE, Amor DJ, Goel H, Dinger ME, Bennetts B, Jamieson RV. Genome sequencing in congenital cataracts improves diagnostic yield. Hum Mutat 2021; 42:1173-1183. [PMID: 34101287 DOI: 10.1002/humu.24240] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 05/31/2021] [Accepted: 06/03/2021] [Indexed: 01/11/2023]
Abstract
Congenital cataracts are one of the major causes of childhood-onset blindness around the world. Genetic diagnosis provides benefits through avoidance of unnecessary tests, surveillance of extraocular features, and genetic family information. In this study, we demonstrate the value of genome sequencing in improving diagnostic yield in congenital cataract patients and families. We applied genome sequencing to investigate 20 probands with congenital cataracts. We examined the added value of genome sequencing across a total cohort of 52 probands, including 14 unable to be diagnosed using previous microarray and exome or panel-based approaches. Although exome or genome sequencing would have detected the variants in 35/52 (67%) of the cases, specific advantages of genome sequencing led to additional diagnoses in 10% (5/52) of the overall cohort, and we achieved an overall diagnostic rate of 77% (40/52). Specific benefits of genome sequencing were due to detection of small copy number variants (2), indels in repetitive regions (2) or single-nucleotide variants (SNVs) in GC-rich regions (1), not detectable on the previous microarray, exome sequencing, or panel-based approaches. In other cases, SNVs were identified in cataract disease genes, including those newly identified since our previous study. This study highlights the additional yield of genome sequencing in congenital cataracts.
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Affiliation(s)
- Alan Ma
- Eye Genetics Research Unit, The Children's Hospital at Westmead, Save Sight Institute, Children's Medical Research Institute, University of Sydney, Sydney, New South Wales, Australia.,Department of Clinical Genetics, Western Sydney Genetics Program, The Children's Hospital at Westmead, Sydney, New South Wales, Australia.,Specialties of Genomic Medicine & Child and Adolescent Health, Faculty of Medicine and Health, University of Sydney, Sydney, New South Wales, Australia
| | - John R Grigg
- Eye Genetics Research Unit, The Children's Hospital at Westmead, Save Sight Institute, Children's Medical Research Institute, University of Sydney, Sydney, New South Wales, Australia.,Department of Ophthalmology, The Children's Hospital at Westmead, Sydney, New South Wales, Australia.,Specialty of Ophthalmology, University of Sydney, Sydney, New South Wales, Australia.,Save Sight Institute, Sydney Eye Hospital, Sydney, New South Wales, Australia
| | - Maree Flaherty
- Department of Ophthalmology, The Children's Hospital at Westmead, Sydney, New South Wales, Australia.,Specialty of Ophthalmology, University of Sydney, Sydney, New South Wales, Australia
| | - James Smith
- Department of Ophthalmology, The Children's Hospital at Westmead, Sydney, New South Wales, Australia.,Specialty of Ophthalmology, University of Sydney, Sydney, New South Wales, Australia
| | - Andre E Minoche
- Kinghorn Centre for Clinical Genomics, Garvan Institute of Medical Research, Darlinghurst, New South Wales, Australia
| | - Mark J Cowley
- Kinghorn Centre for Clinical Genomics, Garvan Institute of Medical Research, Darlinghurst, New South Wales, Australia.,Children's Cancer Institute, Lowy Cancer Research Centre, University of New South Wales, Randwick, New South Wales, Australia.,St Vincent's Clinical School, Faculty of Medicine, UNSW Australia, Sydney, New South Wales, Australia
| | - Benjamin M Nash
- Eye Genetics Research Unit, The Children's Hospital at Westmead, Save Sight Institute, Children's Medical Research Institute, University of Sydney, Sydney, New South Wales, Australia.,Specialties of Genomic Medicine & Child and Adolescent Health, Faculty of Medicine and Health, University of Sydney, Sydney, New South Wales, Australia.,Sydney Genome Diagnostics, Western Sydney Genetics Program, The Children's Hospital at Westmead, Sydney, New South Wales, Australia
| | - Gladys Ho
- Specialties of Genomic Medicine & Child and Adolescent Health, Faculty of Medicine and Health, University of Sydney, Sydney, New South Wales, Australia.,Sydney Genome Diagnostics, Western Sydney Genetics Program, The Children's Hospital at Westmead, Sydney, New South Wales, Australia
| | - Thet Gayagay
- Sydney Genome Diagnostics, Western Sydney Genetics Program, The Children's Hospital at Westmead, Sydney, New South Wales, Australia
| | - Tiffany Lai
- Sydney Genome Diagnostics, Western Sydney Genetics Program, The Children's Hospital at Westmead, Sydney, New South Wales, Australia
| | - Elizabeth Farnsworth
- Sydney Genome Diagnostics, Western Sydney Genetics Program, The Children's Hospital at Westmead, Sydney, New South Wales, Australia
| | - Emma L Hackett
- Sydney Genome Diagnostics, Western Sydney Genetics Program, The Children's Hospital at Westmead, Sydney, New South Wales, Australia
| | - Katrina Slater
- Sydney Genome Diagnostics, Western Sydney Genetics Program, The Children's Hospital at Westmead, Sydney, New South Wales, Australia
| | - Karen Wong
- Sydney Genome Diagnostics, Western Sydney Genetics Program, The Children's Hospital at Westmead, Sydney, New South Wales, Australia
| | - Katherine J Holman
- Sydney Genome Diagnostics, Western Sydney Genetics Program, The Children's Hospital at Westmead, Sydney, New South Wales, Australia
| | - Gemma Jenkins
- Sydney Genome Diagnostics, Western Sydney Genetics Program, The Children's Hospital at Westmead, Sydney, New South Wales, Australia
| | - Anson Cheng
- Eye Genetics Research Unit, The Children's Hospital at Westmead, Save Sight Institute, Children's Medical Research Institute, University of Sydney, Sydney, New South Wales, Australia
| | - Frank Martin
- Department of Ophthalmology, The Children's Hospital at Westmead, Sydney, New South Wales, Australia.,Specialty of Ophthalmology, University of Sydney, Sydney, New South Wales, Australia
| | - Natasha J Brown
- Department of Paediatrics, University of Melbourne, Parkville, Victoria, Australia.,Victorian Clinical Genetics Services, Murdoch Children's Research Institute, Melbourne, Australia
| | | | - David J Amor
- Department of Paediatrics, University of Melbourne, Parkville, Victoria, Australia.,Victorian Clinical Genetics Services, Murdoch Children's Research Institute, Melbourne, Australia
| | - Himanshu Goel
- Hunter Genetics, Newcastle, New South Wales, Australia
| | - Marcel E Dinger
- Kinghorn Centre for Clinical Genomics, Garvan Institute of Medical Research, Darlinghurst, New South Wales, Australia.,School of Biotechnology and Biomolecular Sciences, Faculty of Science, UNSW, Sydney, New South Wales, Australia
| | - Bruce Bennetts
- Specialties of Genomic Medicine & Child and Adolescent Health, Faculty of Medicine and Health, University of Sydney, Sydney, New South Wales, Australia.,Sydney Genome Diagnostics, Western Sydney Genetics Program, The Children's Hospital at Westmead, Sydney, New South Wales, Australia
| | - Robyn V Jamieson
- Eye Genetics Research Unit, The Children's Hospital at Westmead, Save Sight Institute, Children's Medical Research Institute, University of Sydney, Sydney, New South Wales, Australia.,Department of Clinical Genetics, Western Sydney Genetics Program, The Children's Hospital at Westmead, Sydney, New South Wales, Australia.,Specialties of Genomic Medicine & Child and Adolescent Health, Faculty of Medicine and Health, University of Sydney, Sydney, New South Wales, Australia
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21
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Taylan Şekeroğlu H, Utine GE. Congenital Cataract and Its Genetics: The Era of Next-Generation Sequencing. Turk J Ophthalmol 2021; 51:107-113. [PMID: 33951899 PMCID: PMC8109038 DOI: 10.4274/tjo.galenos.2020.08377] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Congenital cataract is a challenging ophthalmological disorder which can cause severe visual loss. It can be diagnosed at birth or during the first year of life. Early diagnosis and treatment are crucial for the visual prognosis. It can be associated with various ocular and systemic abnormalities. Determining whether congenital cataract is isolated or associated with other pathology is an indispensable step for the prediction of potential vision as well as early diagnosis and treatment of conditions that can cause morbidity or mortality. Many genes have been identified in the molecular etiology of congenital cataract. Most mutations have been reported in the crystallin genes. Determination of the genetic cause may not only enable individualized genetic counseling but also help to identify concomitant ocular and/or systemic disorders depending on the characteristics of the genetic test used. Recently, next-generation sequencing in particular has become an evolving technology for determining the molecular etiology of congenital cataract and furthering our knowledge of the disease.
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Affiliation(s)
| | - Gülen Eda Utine
- Hacettepe University Faculty of Medicine, Department of Pediatrics, Department of Pediatric Genetics, Ankara, Turkey
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22
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Fernández-Alcalde C, Nieves-Moreno M, Noval S, Peralta JM, Montaño VEF, del Pozo Á, Santos-Simarro F, Vallespín E. Molecular and Genetic Mechanism of Non-Syndromic Congenital Cataracts. Mutation Screening in Spanish Families. Genes (Basel) 2021; 12:580. [PMID: 33923544 PMCID: PMC8072554 DOI: 10.3390/genes12040580] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2021] [Revised: 04/12/2021] [Accepted: 04/14/2021] [Indexed: 11/28/2022] Open
Abstract
Our purpose was to identify mutations responsible for non-syndromic congenital cataracts through the implementation of next-generation sequencing (NGS) in our center. A sample of peripheral blood was obtained from probands and willing family members and genomic DNA was extracted from leukocytes. DNA was analyzed implementing a panel (OFTv2.1) including 39 known congenital cataracts disease genes. 62 probands from 51 families were recruited. Pathogenic or likely pathogenic variants were identified in 32 patients and 25 families; in 16 families (64%) these were de novo mutations. The mutation detection rate was 49%. Almost all reported mutations were autosomal dominant. Mutations in crystallin genes were found in 30% of the probands. Mutations in membrane proteins were detected in seven families (two in GJA3 and five in GJA8). Mutations in LIM2 and MIP were each found in three families. Other mutations detected affected EPHA2, PAX6, HSF4 and PITX3. Variants classified as of unknown significance were found in 5 families (9.8%), affecting CRYBB3, LIM2, EPHA2, ABCB6 and TDRD7. Mutations lead to different cataract phenotypes within the same family.
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Affiliation(s)
- Celia Fernández-Alcalde
- Department of Ophthalmology, Hospital Universitario La Paz, 28046 Madrid, Spain; (M.N.-M.); (S.N.); (J.M.P.)
| | - María Nieves-Moreno
- Department of Ophthalmology, Hospital Universitario La Paz, 28046 Madrid, Spain; (M.N.-M.); (S.N.); (J.M.P.)
| | - Susana Noval
- Department of Ophthalmology, Hospital Universitario La Paz, 28046 Madrid, Spain; (M.N.-M.); (S.N.); (J.M.P.)
| | - Jesús M. Peralta
- Department of Ophthalmology, Hospital Universitario La Paz, 28046 Madrid, Spain; (M.N.-M.); (S.N.); (J.M.P.)
| | - Victoria E. F. Montaño
- Department of Molecular Ophthalmology, Medical and Molecular Genetics Institute (INGEMM) IdiPaz, CIBERER, Hospital Universitario La Paz, 28046 Madrid, Spain; (V.E.F.M.); (E.V.)
| | - Ángela del Pozo
- Department of Clinical Bioinformatics, Medical and Molecular Genetics Institute (INGEMM) IdiPaz, CIBERER, Hospital Universitario La Paz, 28046 Madrid, Spain;
| | - Fernando Santos-Simarro
- Department of Clinical Genetics, Medical and Molecular Genetics Institute (INGEMM) IdiPaz, CIBERER, Hospital Universitario La Paz, 28046 Madrid, Spain;
| | - Elena Vallespín
- Department of Molecular Ophthalmology, Medical and Molecular Genetics Institute (INGEMM) IdiPaz, CIBERER, Hospital Universitario La Paz, 28046 Madrid, Spain; (V.E.F.M.); (E.V.)
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23
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Yu Y, Xu J, Qiao Y, Li J, Yao K. A new heterozygous mutation in the stop codon of CRYAB (p.X176Y) is liable for congenital posterior pole cataract in a Chinese family. Ophthalmic Genet 2020; 42:139-143. [PMID: 33272090 DOI: 10.1080/13816810.2020.1855665] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
Background: The present study aims to identify the underlying genetic defects in a Chinese family with autosomal dominant congenital cataracts (ADCC).Methods: Detailed family histories and clinical data were recorded. Targeted exome sequencing of 54 known cataract-associated genes combined with high-throughput next-generation sequencing was conducted followed by Sanger sequencing and bioinformatic analysis to identify the causative gene lesion for the family.Results: A four-generation Chinese family with posterior pole type cataract were enrolled. Enrichment of targeted genes revealed a new heterozygous p.X176Y mutation in the stop codon of αB-crystallin (CRYAB) gene, which resulted in the loss of the stop codon and prolongation of the mutant protein by 19 amino acid residues (p.X176Yfs19*). Sanger sequencing showed complete co-segregation with the disease. The elongated mutant protein was predicted to be pathogenic by forming new α-helix and random-coil in the secondary structure as well as producing an extended strand in the tertiary structure, potentially leading to increased hydrophobicity and reduced protein stability.Conclusions: Our report added a new mutation in the spectrum of congenital cataracts. The data suggested that X176 residue in the COOH-terminal is of crucial importance for the αB-crystallin protein function which was valuable for further study of the pathogenesis of congenital cataracts.Abbreviations: CRYAB: αB-crystallin; DNA: deoxyribonucleic acid; PCR: polymerase chain reaction; TES: targeted exome sequencing; ACD: αB-crystallin domain.
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Affiliation(s)
- Yinhui Yu
- Department of Eye Center, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China.,Zhejiang Provincial Key Lab of Ophthalmology, Hangzhou, Zhejiang Province, China
| | - Jingjie Xu
- Department of Eye Center, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China.,Zhejiang Provincial Key Lab of Ophthalmology, Hangzhou, Zhejiang Province, China
| | - Yue Qiao
- Department of Eye Center, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China.,Zhejiang Provincial Key Lab of Ophthalmology, Hangzhou, Zhejiang Province, China
| | - Jinyu Li
- Department of Eye Center, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China.,Zhejiang Provincial Key Lab of Ophthalmology, Hangzhou, Zhejiang Province, China
| | - Ke Yao
- Department of Eye Center, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang Province, China.,Zhejiang Provincial Key Lab of Ophthalmology, Hangzhou, Zhejiang Province, China
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24
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Bremond-Gignac D, Daruich A, Robert MP, Valleix S. Recent developments in the management of congenital cataract. ANNALS OF TRANSLATIONAL MEDICINE 2020; 8:1545. [PMID: 33313290 PMCID: PMC7729375 DOI: 10.21037/atm-20-3033] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Congenital cataract is a rare eye disease, one of the leading treatable causes of low vision in children worldwide. Hereditary cataracts can be divided in syndromic and non-syndromic cataracts. Early diagnosis in congenital cataracts is key to reach good visual function. Current surgical techniques, that combine microincision cataract extraction and primary intraocular lens (IOL) implantation, have improved childhood cataract outcome. Complications include posterior capsule opacification (PCO), aphakic or pseudophakic glaucoma, uveitis, pupil displacement and IOL decentration. A recent study using a modified Delphi approach identified areas of consensus and disagreement in the management of pediatric cataract. A consensus or near consensus was achieved for 79% of the questions, however 21% of the questions remained controversial, as for IOL implantation strategy. Congenital cataracts show a highly variable phenotype and genotype, and can be related to different mutations, genetic variance, and other risk factors. Congenital cataracts can be associated with other ocular developmental abnormalities, including microphthalmia, microcornea, or aniridia and with systemic findings. Next-generation sequencing (NGS) and forthcoming new ultra-high-throughput sequencing represent excellent tools to investigate the genetic causes of congenital cataracts. A better recognition of different clinical presentations and underlying etiologies of congenital cataracts may lead to the development of new approaches to improve visual outcome after cataract surgery and promote early detection of systemic associated syndromes.
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Affiliation(s)
- Dominique Bremond-Gignac
- Ophthalmology Department, Necker-Enfants Malades Hospital, Paris University, Paris, France.,INSERM UMRS 1138, Team 17, From Physiopathology of Ocular Diseases to Clinical Development, Université Sorbonne Paris Cité, Centre de Recherche des Cordeliers, Paris, France
| | - Alejandra Daruich
- Ophthalmology Department, Necker-Enfants Malades Hospital, Paris University, Paris, France.,INSERM UMRS 1138, Team 17, From Physiopathology of Ocular Diseases to Clinical Development, Université Sorbonne Paris Cité, Centre de Recherche des Cordeliers, Paris, France
| | - Matthieu P Robert
- Ophthalmology Department, Necker-Enfants Malades Hospital, Paris University, Paris, France.,Borelli Centre, UMR 9010 CNRS-SSA-ENS Paris Saclay-Paris University, Paris, France
| | - Sophie Valleix
- INSERM UMRS 1138, Team 17, From Physiopathology of Ocular Diseases to Clinical Development, Université Sorbonne Paris Cité, Centre de Recherche des Cordeliers, Paris, France.,Molecular Genetics, University Hospital Necker-Enfants Malades, APHP, OPHTARA Center, Paris, France
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25
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Sun W, Xu J, Gu Y, Du C. The relationship between major intrinsic protein genes and cataract. Int Ophthalmol 2020; 41:375-387. [PMID: 32920712 DOI: 10.1007/s10792-020-01583-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2020] [Accepted: 08/29/2020] [Indexed: 10/23/2022]
Abstract
BACKGROUND Genetic factors play an essential role in the development of cataracts, and the major intrinsic protein (MIP) gene is a type of causative genes. Our study aims to discuss the current research progress of MIP genes responsible for cataractogenesis in DNA and protein levels, which is essential in achieving a response to the molecular deficiencies and pathophysiologic features of cataract. METHODS We developed a search strategy using a combination of the words "Cataract", "Mutation", "MIP gene", and "AQP0" to identify all articles from PubMed, Web of Science, Scopus, and Google Scholar up to December 2019. To find more articles and to ensure that databases were thoroughly searched, the reference lists of selected items were also reviewed. RESULTS A total of 29 MIP gene mutations causing congenital cataract were obtained by searching these databases and analyzing the results of genetic mutation pathogenicity prediction software tools; most of them caused amino acid codon changes in the H4, H5, H6, C-TIDs, and loop C in the structure of the MIP protein. However, there was no clear causality between lens morphology, phenotypes, and genotypes. The genotype TC in polymorphism c.-4T > C and haplotype CCG of rs2269348, c.-4T > C, and rs74641138 in MIP may attach an additional genetic risk factor for age-related cataract. CONCLUSION These single-base mutations and single nucleotide polymorphisms might be importantly involved in the pathogenesis of congenital cataract and age-related cataract, respectively. This review provides a significant reference for clinical trials and theoretical studies.
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Affiliation(s)
- Wen Sun
- Department of Ophthalmology, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79 Qingchun Road, 310003, Hangzhou, China
| | - Jiawei Xu
- Department of Ophthalmology, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79 Qingchun Road, 310003, Hangzhou, China
| | - Yangshun Gu
- Department of Ophthalmology, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79 Qingchun Road, 310003, Hangzhou, China
| | - Chixin Du
- Department of Ophthalmology, The First Affiliated Hospital, College of Medicine, Zhejiang University, 79 Qingchun Road, 310003, Hangzhou, China.
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26
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Sun W, Xu J, Sheng Y, Gu Y, Du C. Novel missense mutation of major intrinsic protein gene in congenital cataract. Clin Exp Ophthalmol 2020; 48:996-998. [PMID: 32533637 DOI: 10.1111/ceo.13810] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Revised: 05/26/2020] [Accepted: 05/31/2020] [Indexed: 12/01/2022]
Affiliation(s)
- Wen Sun
- Department of Ophthalmology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Jiawei Xu
- Department of Ophthalmology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Yan Sheng
- Department of Ophthalmology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Yangshun Gu
- Department of Ophthalmology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Chixin Du
- Department of Ophthalmology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, China
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27
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Kröll-Hermi A, Ebstein F, Stoetzel C, Geoffroy V, Schaefer E, Scheidecker S, Bär S, Takamiya M, Kawakami K, Zieba BA, Studer F, Pelletier V, Eyermann C, Speeg-Schatz C, Laugel V, Lipsker D, Sandron F, McGinn S, Boland A, Deleuze JF, Kuhn L, Chicher J, Hammann P, Friant S, Etard C, Krüger E, Muller J, Strähle U, Dollfus H. Proteasome subunit PSMC3 variants cause neurosensory syndrome combining deafness and cataract due to proteotoxic stress. EMBO Mol Med 2020; 12:e11861. [PMID: 32500975 PMCID: PMC7338805 DOI: 10.15252/emmm.201911861] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2019] [Revised: 05/04/2020] [Accepted: 05/07/2020] [Indexed: 12/13/2022] Open
Abstract
The ubiquitin–proteasome system degrades ubiquitin‐modified proteins to maintain protein homeostasis and to control signalling. Whole‐genome sequencing of patients with severe deafness and early‐onset cataracts as part of a neurological, sensorial and cutaneous novel syndrome identified a unique deep intronic homozygous variant in the PSMC3 gene, encoding the proteasome ATPase subunit Rpt5, which lead to the transcription of a cryptic exon. The proteasome content and activity in patient's fibroblasts was however unaffected. Nevertheless, patient's cells exhibited impaired protein homeostasis characterized by accumulation of ubiquitinated proteins suggesting severe proteotoxic stress. Indeed, the TCF11/Nrf1 transcriptional pathway allowing proteasome recovery after proteasome inhibition is permanently activated in the patient's fibroblasts. Upon chemical proteasome inhibition, this pathway was however impaired in patient's cells, which were unable to compensate for proteotoxic stress although a higher proteasome content and activity. Zebrafish modelling for knockout in PSMC3 remarkably reproduced the human phenotype with inner ear development anomalies as well as cataracts, suggesting that Rpt5 plays a major role in inner ear, lens and central nervous system development.
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Affiliation(s)
- Ariane Kröll-Hermi
- Laboratoire de Génétique Médicale, INSERM, UMRS_1112, Institut de Génétique Médicale d'Alsace (IGMA), Université de Strasbourg, Faculté de médecine de Strasbourg, Strasbourg, France.,Karlsruhe Institute of Technology (KIT), Institut für Biologische und Chemische Systeme (IBCS, BIP), Eggenstein-Leopoldshafen, Germany
| | - Frédéric Ebstein
- Institut für Medizinische Biochemie und Molekularbiologie (IMBM), Universitätsmedizin Greifswald, Greifswald, Germany
| | - Corinne Stoetzel
- Laboratoire de Génétique Médicale, INSERM, UMRS_1112, Institut de Génétique Médicale d'Alsace (IGMA), Université de Strasbourg, Faculté de médecine de Strasbourg, Strasbourg, France
| | - Véronique Geoffroy
- Laboratoire de Génétique Médicale, INSERM, UMRS_1112, Institut de Génétique Médicale d'Alsace (IGMA), Université de Strasbourg, Faculté de médecine de Strasbourg, Strasbourg, France
| | - Elise Schaefer
- Laboratoire de Génétique Médicale, INSERM, UMRS_1112, Institut de Génétique Médicale d'Alsace (IGMA), Université de Strasbourg, Faculté de médecine de Strasbourg, Strasbourg, France.,Service de Génétique Médicale, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Sophie Scheidecker
- Laboratoire de Génétique Médicale, INSERM, UMRS_1112, Institut de Génétique Médicale d'Alsace (IGMA), Université de Strasbourg, Faculté de médecine de Strasbourg, Strasbourg, France.,Laboratoires de Diagnostic Génétique, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Séverine Bär
- Laboratoire de Génétique Moléculaire, Génomique, Microbiologie (GMGM), UMR7156, Centre National de Recherche Scientifique (CNRS), Université de Strasbourg, Strasbourg, France
| | - Masanari Takamiya
- Karlsruhe Institute of Technology (KIT), Institut für Biologische und Chemische Systeme (IBCS, BIP), Eggenstein-Leopoldshafen, Germany
| | - Koichi Kawakami
- Laboratory of Molecular and Developmental Biology, National Institute of Genetics, Mishima, Japan.,Department of Genetics, SOKENDAI (The Graduate University for Advanced Studies), Mishima, Japan
| | - Barbara A Zieba
- Institut für Medizinische Biochemie und Molekularbiologie (IMBM), Universitätsmedizin Greifswald, Greifswald, Germany
| | - Fouzia Studer
- Filière SENSGENE, Centre de Référence pour les affections rares en génétique ophtalmologique, CARGO, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Valerie Pelletier
- Service de Génétique Médicale, Hôpitaux Universitaires de Strasbourg, Strasbourg, France.,Filière SENSGENE, Centre de Référence pour les affections rares en génétique ophtalmologique, CARGO, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Carine Eyermann
- Service de chirurgie ORL, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Claude Speeg-Schatz
- Department of Ophthalmology, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Vincent Laugel
- Laboratoire de Génétique Médicale, INSERM, UMRS_1112, Institut de Génétique Médicale d'Alsace (IGMA), Université de Strasbourg, Faculté de médecine de Strasbourg, Strasbourg, France.,Service de Pédiatrie, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Dan Lipsker
- Faculté de Médecine, Hôpitaux Universitaires, Université de Strasbourg et Clinique Dermatologique, Strasbourg, France
| | - Florian Sandron
- Centre National de Recherche en Génomique Humaine (CNRGH), Institut de Biologie François Jacob, CEA, Université Paris-Saclay, Evry, France
| | - Steven McGinn
- Centre National de Recherche en Génomique Humaine (CNRGH), Institut de Biologie François Jacob, CEA, Université Paris-Saclay, Evry, France
| | - Anne Boland
- Centre National de Recherche en Génomique Humaine (CNRGH), Institut de Biologie François Jacob, CEA, Université Paris-Saclay, Evry, France
| | - Jean-François Deleuze
- Centre National de Recherche en Génomique Humaine (CNRGH), Institut de Biologie François Jacob, CEA, Université Paris-Saclay, Evry, France.,Centre d'études du polymorphisme humain-Fondation Jean Dausset, Paris, France
| | - Lauriane Kuhn
- CNRS FRC1589, Institut de Biologie Moléculaire et Cellulaire (IBMC), Plateforme Protéomique Strasbourg-Esplanade, Strasbourg, France
| | - Johana Chicher
- CNRS FRC1589, Institut de Biologie Moléculaire et Cellulaire (IBMC), Plateforme Protéomique Strasbourg-Esplanade, Strasbourg, France
| | - Philippe Hammann
- CNRS FRC1589, Institut de Biologie Moléculaire et Cellulaire (IBMC), Plateforme Protéomique Strasbourg-Esplanade, Strasbourg, France
| | - Sylvie Friant
- Laboratoire de Génétique Moléculaire, Génomique, Microbiologie (GMGM), UMR7156, Centre National de Recherche Scientifique (CNRS), Université de Strasbourg, Strasbourg, France
| | - Christelle Etard
- Karlsruhe Institute of Technology (KIT), Institut für Biologische und Chemische Systeme (IBCS, BIP), Eggenstein-Leopoldshafen, Germany
| | - Elke Krüger
- Institut für Medizinische Biochemie und Molekularbiologie (IMBM), Universitätsmedizin Greifswald, Greifswald, Germany
| | - Jean Muller
- Laboratoire de Génétique Médicale, INSERM, UMRS_1112, Institut de Génétique Médicale d'Alsace (IGMA), Université de Strasbourg, Faculté de médecine de Strasbourg, Strasbourg, France.,Laboratoires de Diagnostic Génétique, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Uwe Strähle
- Karlsruhe Institute of Technology (KIT), Institut für Biologische und Chemische Systeme (IBCS, BIP), Eggenstein-Leopoldshafen, Germany
| | - Hélène Dollfus
- Laboratoire de Génétique Médicale, INSERM, UMRS_1112, Institut de Génétique Médicale d'Alsace (IGMA), Université de Strasbourg, Faculté de médecine de Strasbourg, Strasbourg, France.,Service de Génétique Médicale, Hôpitaux Universitaires de Strasbourg, Strasbourg, France.,Filière SENSGENE, Centre de Référence pour les affections rares en génétique ophtalmologique, CARGO, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
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28
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Verberne EA, Faries S, Mannens MMAM, Postma AV, van Haelst MM. Expanding the phenotype of biallelic RNPC3 variants associated with growth hormone deficiency. Am J Med Genet A 2020; 182:1952-1956. [PMID: 32462814 PMCID: PMC7496482 DOI: 10.1002/ajmg.a.61632] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Revised: 04/28/2020] [Accepted: 04/29/2020] [Indexed: 12/21/2022]
Abstract
Pathogenic variants in components of the minor spliceosome have been associated with several human diseases. Recently, it was reported that biallelic RNPC3 variants lead to severe isolated growth hormone deficiency and pituitary hypoplasia. The RNPC3 gene codes for the U11/U12‐65K protein, a component of the minor spliceosome. The minor spliceosome plays a role in the splicing of minor (U12‐type) introns, which are present in ~700–800 genes in humans and represent about 0.35% of all introns. Here, we report a second family with biallelic RNPC3 variants in three siblings with a growth hormone deficiency, central congenital hypothyroidism, congenital cataract, developmental delay/intellectual deficiency and delayed puberty. These cases further confirm the association between biallelic RNPC3 variants and severe postnatal growth retardation due to growth hormone deficiency. Furthermore, these cases show that the phenotype of this minor spliceosome‐related disease might be broader than previously described.
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Affiliation(s)
- Eline A Verberne
- Department of Clinical Genetics, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Sonja Faries
- Department of Pediatrics, Curaçao Medical Center, Willemstad, Curacao
| | - Marcel M A M Mannens
- Department of Clinical Genetics, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Alex V Postma
- Department of Clinical Genetics, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands.,Department of Medical Biology, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Mieke M van Haelst
- Department of Clinical Genetics, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
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29
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Calvas P, Traboulsi EI, Ragge N. Through the looking glass: eye anomalies in the age of molecular science. Hum Genet 2019; 138:795-798. [PMID: 31392423 DOI: 10.1007/s00439-019-02056-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Accepted: 08/01/2019] [Indexed: 11/29/2022]
Affiliation(s)
- Patrick Calvas
- INSERM U1056, Centre de Référence des Anomalies Rares en Génétique Ophtalmologique, Service de Génétique Médicale, Centre Hospitalier Universitaire de Toulouse, Université de Toulouse, Toulouse, France
| | - Elias I Traboulsi
- Center for Genetic Eye Diseases/i32, Cole Eye Institute, The Cleveland Clinic, 9500 Euclid Ave, Cleveland, OH, 44195, USA
| | - Nicola Ragge
- Faculty of Health and Life Sciences, Oxford Brookes University, Oxford, OX3 0BP, UK. .,West Midlands Regional Clinical Genetics Service and Birmingham Health Partners, Birmingham Women's and Children's NHS Foundation Trust, Birmingham, B15 2TG, UK.
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30
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Abstract
Visual impairment leads to a decrease in quality of life. Cataract is the most commonly
observed ocular disease in humans that causes vision disorders. The risk factors
associated with cataract development include aging, infections, eye injuries,
environmental causes, such as radiation and exposure to ultraviolet rays in sunlight, and
genetic mutations. Additionally, several cataract patients display phenotypic
heterogeneity, suggesting the role of genetic modifiers in the modulation of severity and
onset time of cataractogenesis. However, the genetic modifiers associated with cataract
have not been identified in humans yet. In contrast, the identification and mapping of
genetic modifiers have been successfully carried out in mice and rats. In this review, we
focus on the genetic modifiers of cataract in the rodent models.
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Affiliation(s)
- Kenta Wada
- Faculty of Bioindustry, Tokyo University of Agriculture, 196 Yasaka, Abashiri, Hokkaido 099-2493, Japan.,Mammalian Genetics Project, Department of Genome Medicine, Tokyo Metropolitan Institute of Medical Science, 2-1-6 Kamikitazawa, Setagaya-ku, Tokyo 156-8506, Japan
| | - Shumpei P Yasuda
- Mammalian Genetics Project, Department of Genome Medicine, Tokyo Metropolitan Institute of Medical Science, 2-1-6 Kamikitazawa, Setagaya-ku, Tokyo 156-8506, Japan
| | - Yoshiaki Kikkawa
- Mammalian Genetics Project, Department of Genome Medicine, Tokyo Metropolitan Institute of Medical Science, 2-1-6 Kamikitazawa, Setagaya-ku, Tokyo 156-8506, Japan
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