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Tabatabai TS, Salehi M, Rezakhani L, Arabpour Z, Djalilian AR, Alizadeh M. Decellularization of various tissues and organs through chemical methods. Tissue Cell 2024; 91:102573. [PMID: 39393204 DOI: 10.1016/j.tice.2024.102573] [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: 05/01/2024] [Revised: 09/20/2024] [Accepted: 09/23/2024] [Indexed: 10/13/2024]
Abstract
Due to the increase in demand for donor organs and tissues during the past 20 years, new approaches have been created. These methods include, for example, tissue engineering in vitro and the production of regenerative biomaterials for transplantation. Applying the natural extracellular matrix (ECM) as a bioactive biomaterial for clinical applications is a unique approach known as decellularization technology. Decellularization is the process of eliminating cells from an extracellular matrix while preserving its natural components including its structural and functional proteins and glycosaminoglycan. This can be achieved by physical, chemical, or biological processes. A naturally formed three-dimensional structure with a biocompatible and regenerative structure is the result of the decellularization process. Decreasing the biological factors and antigens at the transplant site reduces the risk of adverse effects including inflammatory responses and immunological rejection. Regenerative medicine and tissue engineering applications can benefit from the use of decellularization, a promising approach that provides a biomaterial that preserves its extracellular matrix.
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Affiliation(s)
- Tayebeh Sadat Tabatabai
- Student Research Committee, School of Medicine, Shahroud University of Medical Sciences, Shahroud, Iran
| | - Majid Salehi
- Tissue Engineering and Stem Cells Research Center, Shahroud University of Medical Sciences, Shahroud, Iran; Department of Tissue Engineering, School of Medicine, Shahroud University of Medical Sciences, Shahroud, Iran
| | - Leila Rezakhani
- Fertility and Infertility Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran; Department of Tissue Engineering, School of Medicine, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Zohreh Arabpour
- Department of Ophthalmology and Visual Sciences, University of Illinois, Chicago, IL 60612, USA
| | - Ali R Djalilian
- Department of Ophthalmology and Visual Sciences, University of Illinois, Chicago, IL 60612, USA
| | - Morteza Alizadeh
- Department of Tissue Engineering and Biomaterials, School of Advanced Medical Sciences and Technologies, Hamadan University of Medical Sciences, Hamadan, Iran.
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Ma W, Wu Z, Maghsoudloo M, Ijaz I, Dehghan Shasaltaneh M, Zhang Y, Weng Q, Fu J, Imani S, Wen QL. Dermokine mutations contribute to epithelial-mesenchymal transition and advanced melanoma through ERK/MAPK pathways. PLoS One 2023; 18:e0285806. [PMID: 37432950 PMCID: PMC10335698 DOI: 10.1371/journal.pone.0285806] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 04/29/2023] [Indexed: 07/13/2023] Open
Abstract
To discover vulnerabilities associated with dermokine (DMKN) as a new trigger of the epithelial-mesenchymal transition (EMT) -driven melanoma, we undertook a genome-wide genetic screening using transgenic. Here, we showed that DMKN expression could be constitutively increased in human malignant melanoma (MM) and that this correlates with poor overall survival in melanoma patients, especially in BRAF-mutated MM samples. Furthermore, in vitro, knockdown of DMKN inhibited the cell proliferation, migration, invasion, and apoptosis of MM cancer cells by the activation of ERK/MAPK signaling pathways and regulator of STAT3 in downstream molecular. By interrogating the in vitro melanoma dataset and characterization of advanced melanoma samples, we found that DMKN downregulated the EMT-like transcriptional program by disrupting EMT cortical actin, increasing the expression of epithelial markers, and decreasing the expression of mesenchymal markers. In addition, whole exome sequencing was presented with p.E69D and p.V91A DMKN mutations as a novel somatic loss of function mutations in those patients. Moreover, our purposeful proof-of-principle modeled the interaction of ERK with p.E69D and p.V91A DMKN mutations in the ERK-MAPK kinas signaling that may be naturally associated with triggering the EMT during melanomagenesis. Altogether, these findings provide preclinical evidence for the role of DMKN in shaping the EMT-like melanoma phenotype and introduced DMKN as a new exceptional responder for personalized MM therapy.
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Affiliation(s)
- Wenqiong Ma
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, China
| | - Zexiu Wu
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, China
| | - Mazaher Maghsoudloo
- Faculty of Advanced Science and Technology, Department of Genetics, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
- The Center of Research and Training for Occupational Technical Safety and Health, Tehran, Iran
| | - Iqra Ijaz
- Sichuan Provincial Center for Gynecological and Breast Diseases, Southwest Medical University, Luzhou, Sichuan, China
| | | | - Yuqin Zhang
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, China
| | - Qiao Weng
- Department of Obstetrics & Gynecology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing, China
| | - Junjiang Fu
- Key Laboratory of Epigenetics and Oncology, The Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, Sichuan, China
| | - Saber Imani
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, China
- Shulan International Medical College, Zhejiang Shuren University, Hangzhou, Zhejiang, China
| | - Qing Lian Wen
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, China
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Ripolles-Garcia A, Murgiano L, Ziolkowska N, Marinho FP, Roszak K, Iffrig S, Aguirre GD, Miyadera K. Natural disease history of a canine model of oligogenic RPGRIP1-cone-rod dystrophy establishes variable effects of previously and newly mapped modifier loci. Hum Mol Genet 2023; 32:2139-2151. [PMID: 36951959 PMCID: PMC10281748 DOI: 10.1093/hmg/ddad046] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2023] [Revised: 02/23/2023] [Accepted: 03/21/2023] [Indexed: 03/24/2023] Open
Abstract
Canine RPGRIP1-cone-rod dystrophy (CRD), a model for human inherited retinal diseases (IRDs), was originally identified as autosomal recessive early-onset blindness. However, later studies revealed extensive phenotypic variability among RPGRIP1 mutants. This led to the identification of a homozygous MAP9 variant as a modifier associated with early-onset disease. Based on further phenotypic variation affecting cone photoreceptor function, we report mapping of L3 as an additional modifier locus, within a 4.1-Mb locus on canine chromosome 30. We establish the natural disease history of RPGRIP1-CRD based on up to 9-year long-term functional and structural retinal data from 58 dogs including 44 RPGRIP1 mutants grouped according to the modifier status. RPGRIP1 mutants affected by both MAP9 and L3 modifiers exhibited the most severe phenotypes with rapid disease progression. MAP9 alone was found to act as an overall accelerator of rod and cone diseases, while L3 had a cone-specific effect. Ultrastructural analysis of photoreceptors revealed varying degrees of rod and cone damage, while the connecting cilia appeared structurally preserved in all groups. We conclude that RPGRIP1-CRD is an oligogenic disease with at least three loci contributing to the pathogenesis. While the RPGRIP1 variant is required for developing the disease, MAP9 and L3 modifiers exacerbate the phenotype, individually and cumulatively. Oligogenic canine RPGRIP1-CRD illustrates the impact of multiple genetic modifiers on disease phenotype and thus has the potential to reveal new targets for broad-spectrum therapies for oligogenic or polygenic forms of human IRDs.
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Affiliation(s)
- Ana Ripolles-Garcia
- Division of Experimental Retinal Therapies, Department of Clinical Sciences & Advanced Medicine, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Leonardo Murgiano
- Division of Experimental Retinal Therapies, Department of Clinical Sciences & Advanced Medicine, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Natalia Ziolkowska
- Department of Histology and Embryology, Faculty of Veterinary Medicine, University of Warmia and Mazury, Olsztyn 10-719, Poland
| | - Felipe Pompeo Marinho
- Division of Experimental Retinal Therapies, Department of Clinical Sciences & Advanced Medicine, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Karolina Roszak
- Division of Experimental Retinal Therapies, Department of Clinical Sciences & Advanced Medicine, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Sommer Iffrig
- Division of Experimental Retinal Therapies, Department of Clinical Sciences & Advanced Medicine, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Gustavo D Aguirre
- Division of Experimental Retinal Therapies, Department of Clinical Sciences & Advanced Medicine, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
| | - Keiko Miyadera
- Division of Experimental Retinal Therapies, Department of Clinical Sciences & Advanced Medicine, School of Veterinary Medicine, University of Pennsylvania, Philadelphia, PA 19104, USA
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Fu S, Fu J, Mobasher-Jannat A, Jadidi K, Li Y, Chen R, Imani S, Cheng J. Novel pathogenic CERKL variant in Iranian familial with inherited retinal dystrophies: genotype-phenotype correlation. 3 Biotech 2023; 13:166. [PMID: 37162806 PMCID: PMC10163994 DOI: 10.1007/s13205-023-03535-w] [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: 11/09/2022] [Accepted: 03/28/2023] [Indexed: 05/11/2023] Open
Abstract
Inherited retinal dystrophies (IRDs) include a large chronic heterogeneity genetic disease. While many disease-causing pathogenic variants were involved in the progression of IRD, the Ceramide Kinase Like (CERKL) gene variant in Iranian patients is not well characterized. In this study, a consanguineous Iranian family with three generations was recruited whom presented with the clinical diagnosis of autosomal recessive IRD. By targeted next-generation sequencing (TGS) and Sanger sequencing, the proband was found to have a novel, pathological homozygous deletion variant c.560_568del (p.187_190del) of the CERKL gene (NM_001030311.2) that co-segregated with the disease in all affected family members. The Cerkl is highly expressed in the later four developmental retinal stages, playing a vital role in retina degeneration. Therefore, the identification of a novel, homozygous deletion CERKL variant c.560_568del (p.187_190del) in an IRD familial cohort descent provides insights into the molecular pathogenesis of IRD and facilitates genetic counseling and disease prediction.
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Affiliation(s)
- Shangyi Fu
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX USA
- School of Medicine, Baylor College of Medicine, Houston, TX USA
| | - Jiewen Fu
- Key Laboratory of Epigenetics and Oncology, Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, Sichuan 646000 People’s Republic of China
| | | | - Khosrow Jadidi
- Department of Ophthalmology, Bina Eye Hospital Research Center, Tehran, Iran
| | - Yumei Li
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX USA
| | - Rui Chen
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, TX USA
| | - Saber Imani
- Key Laboratory of Epigenetics and Oncology, Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, Sichuan 646000 People’s Republic of China
- Shulan International Medical College, Zhejiang Shuren University, Hangzhou, Zhejiang China
| | - Jingliang Cheng
- Key Laboratory of Epigenetics and Oncology, Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, Sichuan 646000 People’s Republic of China
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Novel, heterozygous, pathogenic variant (c.4272delA: p.I1426Ffs*2) for the NF1 gene in a large Chinese family with neurofibromatosis type 1. Mol Biol Rep 2023; 50:1117-1123. [PMID: 36401065 DOI: 10.1007/s11033-022-08096-4] [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: 07/22/2022] [Accepted: 11/07/2022] [Indexed: 11/19/2022]
Abstract
BACKGROUND Neurofibromatosis type 1 (NF1) is an autosomal dominant with haploinsufficient, and multisystemic disorder including patches of skin Café-au-lait spots, Lisch nodules in the iris, and tumors in the peripheral nervous systems or fibromatous skin. METHODS Blood samples were collected and DNA was extracted from a large Chinese pedigree suffering from NF1 disease with three spontaneous abortions or death for proband. Analysis for whole exome sequencing (WES), Sanger sequencing, and co-segregation was carried out. Prenatal gene diagnosis was also carried out in amniotic fluid DNA. The expression of NF1 was conducted by bioinformatics. RESULTS A large Chinese pedigree with NF1 was recruited and a novel, heterozygous, variant (c.4272delA: p.I1426Ffs*2) for the NF1 gene in the proband was identified. This variant of NF1 produced a truncated protein that losses half of NF1 protein at the C-terminus including the CRAL-TRIO lipid-binding domain, NLS, and a small portion of Ras-GAP domain, thus leading to pathogenicity (ACMG criteria: PVS1 + PM2). NF1 expressions in different human tissues showed low tissue specificity, which may affect multiple organs presenting different phenotypes. Moreover, prenatal gene diagnosis for NF1 showed both alleles as wild types in the fetus of the proband. CONCLUSION We thus successfully identified a novel, pathogenic, heterozygous variant (c.4272delA:p.I1426Ffs*2) in the NF1 gene of NF1 disorder, expanding the NF1 mutation spectrum, that will help elucidate the molecular pathogenesis of NF1 disease and to contribute to the NF1 diagnosis, genetic counseling, clinical management in this large Chinese family.
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Liu Z, Wang H, He X, Tao D, Li L. Identifying two pathogenic variants in a patient with pigmented paravenous retinochoroidal atrophy. Open Life Sci 2023; 18:20220532. [PMID: 36713053 PMCID: PMC9843229 DOI: 10.1515/biol-2022-0532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 10/06/2022] [Accepted: 11/02/2022] [Indexed: 01/17/2023] Open
Abstract
Little is known about the genetic background of pigmented paravenous retinochoroidal atrophy (PPRCA) due to rarity of patients. In this study, we identified two pathogenic variants in RPGRIP1 in a 2-year-old boy with PPRCA screened by whole-exome sequencing (WES). The patient presented to our department with photophobia for 17 months, and then he underwent fundus photography and fluorescein fundus angiography. Genomic DNA was extracted from peripheral blood of the proband and the parents. Trio-WES strategy was utilized to identify the causal variants from the proband and the parents, followed by validation based on Sanger sequencing. The patient was finally diagnosed with PPRCA after differential diagnosis. Two heterozygous pathogenic variants were detected by WES according to the American college of medical genetics and genomics guidelines, including NM_020366.4: c.2592T > G: p.Y864* and NM_020366.4: c.154C > T: p.R52* in RPGRIP1 located in exon 17 and exon 3, leading to termination codon, respectively. This is the first study reporting pathogenic variants within RPGRIP1 as causal for PPRCA.
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Affiliation(s)
- Zeyuan Liu
- Department of Ophthalmology, Kunming Children’s Hospital, No. 288, Qianxing Road, Xishan District, Kunming 650228, China
| | - He Wang
- Department of Ophthalmology, Kunming Children’s Hospital, No. 288, Qianxing Road, Xishan District, Kunming 650228, China
| | - Xiaoli He
- Department of Ophthalmology, Kunming Children’s Hospital, Yunnan Institute of Pediatrics, Yunnan Province Clinical Research Center for Children’s Health and Disease, Yunnan Key Laboratory of Children’s Major Disease Research, No. 288, Qianxing Road, Xishan District, Kunming 650228, China
| | - Dan Tao
- Department of Ophthalmology, Kunming Children’s Hospital, No. 288, Qianxing Road, Xishan District, Kunming 650228, China
| | - Li Li
- Department of Ophthalmology, Kunming Children’s Hospital, Yunnan Institute of Pediatrics, Yunnan Province Clinical Research Center for Children’s Health and Disease, Yunnan Key Laboratory of Children’s Major Disease Research, No. 288, Qianxing Road, Xishan District, Kunming 650228, China
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Neissi M, Al-Badran AI, Mohammadi-Asl J. Exome sequencing identifies a novel GUCY2D mutation in an Iranian family with Leber congenital amaurosis-1: a case report. EGYPTIAN JOURNAL OF MEDICAL HUMAN GENETICS 2022. [DOI: 10.1186/s43042-022-00217-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Abstract
Background
Leber congenital amaurosis (LCA), the severe form of inherited retinal degenerative disorder, is a prevalent disorder in the first year of life. Recently, genetic studies discovered that different gene mutations are responsible for LCA clinical manifestations.
Case presentation
In this study, we applied whole exome sequencing (WES) to identify probable gene defects in an Iranian girl with LCA-1. We found a novel disease-causing GUCY2D gene mutation (c.2348T > C; p.L783P), located in exon 12 (NM_000180), causing a missense mutation that has been changed the coding protein. The WES-identified variant was confirmed by Sanger sequencing for the patient and her healthy parents. Submitted to genetic counseling that the patient was 1-year old and blindness from birth.
Conclusions
Our findings establish that this detected GUCY2D-p.L783P mutation is the pathogenic variant for LCA-1. This is the first genetic study indicating that c.2348T > C missense mutation in the homozygous state in GUCY2D gene is responsible for the LCA-1 phenotype.
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Ocular Characteristics of Patients with Leber Congenital Amaurosis 6 Caused by Pathogenic RPGRIP1 Gene Variation in a Chinese Cohort. J Ophthalmol 2021; 2021:9966427. [PMID: 34796026 PMCID: PMC8595035 DOI: 10.1155/2021/9966427] [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: 04/02/2021] [Accepted: 10/13/2021] [Indexed: 11/17/2022] Open
Abstract
Purpose To delineate the clinical and genetic characteristics of Chinese patients with RPGRIP1-associated Leber congenital amaurosis 6 (LCA6). Methods After screening 352 unrelated families with clinically diagnosed RP, five LCA6 patients with RPGRIP1 variations from unrelated Chinese families were identified. Full ophthalmology examinations, including decimal best-corrected visual acuity (BCVA), fundus photography, fundus autofluorescence imaging, spectral-domain optical coherence tomography (SD-OCT), full-field electroretinography (ffERG), multifocal electroretinography (mfERG), perimetry, and flash visual evoked potential (FVEP), were performed. Target next-generation sequencing (NGS) and Sanger sequencing were performed for the five patients to identify and to validate candidate disease-causing variants. Results Five patients were molecularly diagnosed as the LCA6 associated with RPGRIP1 variation, with typical clinical characteristics including congenital night blindness, nystagmus, and visual defect, at an early age. Interestingly, LCA6 exhibited extensive clinical heterogeneity and the changes in the morphology and function were not completely consistent in the five LCA6 patients. Case 1 showed extensive inferior-nasal retinal atrophy with a corresponding area of hypofluorescence in fundus autofluorescence, and the fundus photograph was nearly normal in cases 2 and 3. The ERG results displayed a moderately reduced rod-system response in cases 1 and 2 and a significant reduced rod-system response in case 3. Both case 4 and case 5 showed mottled pigmentation in fundi and an unrecordable rod and cone-system response in ERG. Moreover, we identified eight compound variants and one homozygous variant in the five patients with RPGRIP1. Conclusions This is the largest report focused on the clinical electrophysiological features of patients with associated LCA6 caused by the variation in the RPGRIP1 gene in the Chinese population with an enriched phenotypic and genotypic background of LCA6 to improve future gene therapies.
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Beryozkin A, Aweidah H, Carrero Valenzuela RD, Berman M, Iguzquiza O, Cremers FPM, Khan MI, Swaroop A, Amer R, Khateb S, Ben-Yosef T, Sharon D, Banin E. Retinal Degeneration Associated With RPGRIP1: A Review of Natural History, Mutation Spectrum, and Genotype-Phenotype Correlation in 228 Patients. Front Cell Dev Biol 2021; 9:746781. [PMID: 34722527 PMCID: PMC8551679 DOI: 10.3389/fcell.2021.746781] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Accepted: 09/15/2021] [Indexed: 12/03/2022] Open
Abstract
Purpose:RPGRIP1 encodes a ciliary protein expressed in the photoreceptor connecting cilium. Mutations in this gene cause ∼5% of Leber congenital amaurosis (LCA) worldwide, but are also associated with cone–rod dystrophy (CRD) and retinitis pigmentosa (RP) phenotypes. Our purpose was to clinically characterize RPGRIP1 patients from our cohort, collect clinical data of additional RPGRIP1 patients reported previously in the literature, identify common clinical features, and seek genotype–phenotype correlations. Methods: Clinical data were collected from 16 patients of our cohort and 212 previously reported RPGRIP1 patients and included (when available) family history, best corrected visual acuity (BCVA), refraction, comprehensive ocular examination, optical coherence tomography (OCT) imaging, visual fields (VF), and full-field electroretinography (ffERG). Results: Out of 228 patients, the majority (197, 86%) were diagnosed with LCA, 18 (7%) with RP, and 13 (5%) with CRD. Age of onset was during early childhood (n = 133, average of 1.7 years). All patients but 6 had moderate hyperopia (n = 59, mean of 4.8D), and average BCVA was 0.06 Snellen (n = 124; only 10 patients had visual acuity [VA] > 0.10 Snellen). On funduscopy, narrowing of blood vessels was noted early in life. Most patients had mild bone spicule-like pigmentation starting in the midperiphery and later encroaching upon the posterior pole. OCT showed thinning of the outer nuclear layer (ONL), while cystoid changes and edema were relatively rare. VF were usually very constricted from early on. ffERG responses were non-detectable in the vast majority of cases. Most of the mutations are predicted to be null (363 alleles), and 93 alleles harbored missense mutations. Missense mutations were identified only in two regions: the RPGR-interacting domain and the C2 domains. Biallelic null mutations are mostly associated with a severe form of the disease, whereas biallelic missense mutations usually cause a milder disease (mostly CRD). Conclusion: Our results indicate that RPGRIP1 biallelic mutations usually cause severe retinal degeneration at an early age with a cone–rod pattern. However, most of the patients exhibit preservation of some (usually low) BCVA for a long period and can potentially benefit from gene therapy. Missense changes appear only in the conserved domains and are associated with a milder phenotype.
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Affiliation(s)
- Avigail Beryozkin
- Department of Ophthalmology, Hadassah Medical Center, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Hamzah Aweidah
- Department of Ophthalmology, Hadassah Medical Center, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | | | - Myriam Berman
- Ophthalmology, Clinical Department, Faculty of Medicine, Universidad Nacional de Tucumán, Tucumán, Argentina
| | - Oscar Iguzquiza
- Neurology, Clinical Department, Faculty of Medicine, Universidad Nacional de Tucumán, Tucumán, Argentina
| | - Frans P M Cremers
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Netherlands
| | - Muhammad Imran Khan
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Netherlands
| | - Anand Swaroop
- Neurobiology-Neurodegeneration and Repair Laboratory, National Eye Institute, National Institutes of Health, Bethesda, MD, United States
| | - Radgonde Amer
- Department of Ophthalmology, Hadassah Medical Center, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Samer Khateb
- Department of Ophthalmology, Hadassah Medical Center, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Tamar Ben-Yosef
- The Ruth and Bruce Rappaport Faculty of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
| | - Dror Sharon
- Department of Ophthalmology, Hadassah Medical Center, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Eyal Banin
- Department of Ophthalmology, Hadassah Medical Center, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
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Novel compound heterozygous missense variants (c.G955A and c.A1822C) of CACNA2D4 likely causing autosomal recessive retinitis pigmentosa in a Chinese patient. 3 Biotech 2021; 11:208. [PMID: 33927996 DOI: 10.1007/s13205-021-02761-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 03/29/2021] [Indexed: 12/28/2022] Open
Abstract
Retinitis pigmentosa (RP) is a rare and heterogeneous group of inherited ocular diseases. However, the relationship between CACNA2D4 mutations and RP is not well understood. In this study, a Chinese autosomal recessive retinitis pigmentosa (arRP) pedigree was enrolled and targeted next-generation sequencing was employed for identifying the causative gene in the proband. These steps were followed by confirmatory Sanger sequencing and segregation analysis. RNA-sequencing (RNA-seq) data and semi-quantitative reverse transcription polymerase chain reaction analysis were then applied to examine the expressions in the human and mouse tissues. Novel compound heterozygous, deleterious missense variants of the CACNA2D4 gene, NM_172364.4: c.G955A (p.D319N) and c.A1822C (p.I608L), were identified in the arRP pedigree, co-segregating with the clinical phenotype in the patient. The CACNA2D4 protein is highly conserved among species. The CACNA2D4 mRNA expression showed the highest expression in the retina of humans and in the later four developmental stages/times of retinal tissues in mice, indicating its role in retina/eye functions and developments. This study is the first to identify novel compound heterozygous mutations c.G955A (p.D319N) and c.A1822C (p.I608L) in the CACNA2D4 gene. These might be disease-causing mutations, thereby extending the mutational spectra. The identification of pathogenic CACNA2D4 variants is expected to enhance our understanding of the genotype-phenotype correlations of arRP for disease diagnosis and genetic counseling. The relationship between the CACNA2D4 variants and diseases/phenotypes other than RP has also been reviewed and discussed in this paper.
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Novel compound heterozygous EYS variants may be associated with arRP in a large Chinese pedigree. Biosci Rep 2021; 40:224912. [PMID: 32436957 PMCID: PMC7268256 DOI: 10.1042/bsr20193443] [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: 10/02/2019] [Revised: 04/22/2020] [Accepted: 04/29/2020] [Indexed: 12/11/2022] Open
Abstract
As a genetically heterogeneous ocular dystrophy, gene mutations with autosomal recessive retinitis pigmentosa (arRP) in patients have not been well described. We aimed to detect the disease-causing genes and variants in a Chinese arRP family. In the present study, a large Chinese pedigree consisting of 31 members including a proband and another two patients was recruited; clinical examinations were conducted; next-generation sequencing using a gene panel was used for identifying pathogenic genes, and Sanger sequencing was performed for verification of mutations. Novel compound heterozygous variants c.G2504A (p.C835Y) and c.G6557A (p.G2186E) for the EYS gene were identified, which co-segregated with the clinical RP phenotypes. Sequencing of 100 ethnically matched normal controls didn't found these mutations in EYS. Therefore, our study identified pathogenic variants in EYS that may cause arRP in this Chinese family. This is the first study to reveal the novel mutation in the EYS gene (c.G2504A, p.C835Y), extending its mutation spectrum. Thus, the EYS c.G2504A (p.C835Y) and c.G6557A (p.G2186E) variants may be the disease-causing missense mutations for RP in this large arRP family. These findings should be helpful for molecular diagnosis, genetic counseling and clinical management of arRP disease.
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A novel missense variant c.G644A (p.G215E) of the RPGR gene in a Chinese family causes X-linked retinitis pigmentosa. Biosci Rep 2020; 39:220828. [PMID: 31652454 PMCID: PMC6822503 DOI: 10.1042/bsr20192235] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Revised: 09/11/2019] [Accepted: 09/24/2019] [Indexed: 01/01/2023] Open
Abstract
The mutations in patients with X-linked retinitis pigmentosa (xlRP) have not been well described in the Chinese population. In the present study, a five-generation Chinese retinitis pigmentosa (RP) family was recruited; targeted next-generation sequencing (TGS) was used to identify causative genes and Sanger sequencing for co-segregation. RNA-seq data analysis and revere transcriptional-polymerase chain reaction (RT-PCR) were applied to investigate gene expression patterns of RP GTPase regulator (RPGR) in human and Rpgr in mouse. A novel, hemizygous, deleterious and missense variant: c.G644A (p.G215E) in the RPGR gene (NM_000328.2) exon 7 of X-chromosome was identified in the proband, which was co-segregated with the clinical phenotypes in this family. RNA-seq data showed that RPGR is ubiquitously expressed in 27 human tissues with testis in highest, but no eye tissues data. Then the expressions for Rpgr mRNA in mice including eye tissues were conducted and showed that Rpgr transcript is ubiquitously expressed very highly in retina and testis, and highly in other eye tissues including lens, sclera, and cornea; and expressed highly in the six different developmental times of retinal tissue. Ubiquitous expression in different tissues from eye and very high expression in the retina indicated that RPGR plays a vital role in eye functions, particularly in retina. In conclusion, our study is the first to indicate that the novel missense variant c.G644A (p.G215E) in the RPGR gene might be the disease-causing mutation in this xlRP family, expanding mutation spectrum. These findings facilitate better understanding of the molecular pathogenesis of this disease; provide new insights for genetic counseling and healthcare.
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Zou L, Imani S, Maghsoudloo M, Shasaltaneh MD, Gao L, Zhou J, Wen Q, Liu S, Zhang L, Chen G. Genome‑wide copy number analysis of circulating tumor cells in breast cancer patients with liver metastasis. Oncol Rep 2020; 44:1075-1093. [PMID: 32705227 PMCID: PMC7388446 DOI: 10.3892/or.2020.7650] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Accepted: 05/12/2020] [Indexed: 12/15/2022] Open
Abstract
The genome‑wide copy number analysis of circulating tumor cells (CTCs) provides a promising prognostic biomarker for survival in breast cancer liver metastasis (BCLM) patients. The present study aimed to confirm the prognostic value of the presence of CTCs in BCLM patients. We previously developed an assay for the genome‑wide pattern differences in copy number variations (CNVs) as an adjunct test for the routine imaging and histopathologic diagnosis methods to distinguish newly diagnosed liver metastases and recurrent liver metastases. Forty‑three breast cancer patients were selected for this study in which 23 newly diagnosed and 20 recurrent liver metastases were diagnosed by histopathology and 18F‑FDG PET/CT imaging. CTCs were counted from all patients using the CellSearch system and were confirmed by cytomorphology and three‑color immunocytochemistry. Genomic DNA of single CTCs was amplified using multiple annealing and looping based amplification cycles (MALBAC). Then, we compared the CTC numbers of newly diagnosed and recurrent BCLM patients using Illumina platforms. A high CTC frequency (>15 CTCs/7.5 ml blood) was found to be correlated with disease severity and metastatic progression, which suggests the value for CTCs in the diagnosis of BCLM in comparison with pathohistology and PET/CT imaging (P>0.05). Moreover, CTCs isolated from BCLM patients remained an independent prognostic detection factor associated with overall survival (P=0.0041). Comparison between newly diagnosed and recurrent liver metastases revealed different frequencies of CNVs (P>0.05). Notably, the CNV pattern of isolated CTCs of recurrent BCLM patients was similar to recurrent liver metastases (nearly 82% of the gain/loss regions). Functional enrichment analysis identified 25 genes as a CNV signature of BCLM. Among them, were defensin and β‑defensin genes, which are significantly associated with anti‑angiogenesis and immunomodulation signaling pathways. High CTC frequencies are effective in the evaluation and differentiation between newly diagnosed liver metastases from recurrent liver metastases. Future clinical studies will be necessary to fully determine the prognostic potential of CTC cluster signatures in patients with BCLM.
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Affiliation(s)
- Linglin Zou
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Southwest Medical University, Luzhou, Sichuan 646000, P.R. China
| | - Saber Imani
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Southwest Medical University, Luzhou, Sichuan 646000, P.R. China
| | - Mazaher Maghsoudloo
- Laboratory of Systems Biology and Bioinformatics (LBB), Institute of Biochemistry and Biophysics, University of Tehran, Tehran 1417614411, Iran
| | | | - Lanyang Gao
- Sichuan Provincial Center for Gynaecology and Breast Disease, The Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan 646000, P.R. China
| | - Jia Zhou
- School of Humanities and Management Science, Southwest Medical University, Luzhou, Sichuan 646000, P.R. China
| | - Qinglian Wen
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Southwest Medical University, Luzhou, Sichuan 646000, P.R. China
| | - Shuya Liu
- Department of Oncology, The Affiliated Hospital of Southwest Medical University, Southwest Medical University, Luzhou, Sichuan 646000, P.R. China
| | - Leisheng Zhang
- The Postdoctoral Research Station, School of Medicine, Nankai University, Tianjin 300071, P.R. China
| | - Gang Chen
- Department of Medical Equipment, The Affiliated Hospital of Southwest Medical University, Southwest Medical University, Luzhou, Sichuan 646000, P.R. China
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Fu J, Shen S, Cheng J, Lv H, Fu J. A case of Usher syndrome type IIA caused by a rare USH2A homozygous frameshift variant with maternal uniparental disomy (UPD) in a Chinese family. J Cell Mol Med 2020; 24:7743-7750. [PMID: 32449591 PMCID: PMC7348175 DOI: 10.1111/jcmm.15405] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2020] [Revised: 04/29/2020] [Accepted: 05/03/2020] [Indexed: 12/29/2022] Open
Abstract
Usher syndrome encompasses a group of genetically and clinically heterogeneous autosomal recessive disorders with hearing deficiencies and retinitis pigmentosa. The mechanisms underlying the Usher syndrome are highly variable. In the present study, a Chinese family with Usher syndrome was recruited. Whole exome sequencing (WES), Sanger sequencing, homozygosity mapping, short tandem repeat (STR) analysis and segregation analysis were performed. Functional domains of the pathogenic variant for USH2A were analysed. We identified a homozygous frameshift variant c.99_100insT (p.Arg34Serfs*41) in the USH2A gene in the proband that showed discordant segregation in the father. Further homozygosity mapping and STR analysis identified an unusual homozygous variant of proband that originated from maternal uniparental disomy (UPD). The p.Arg34Serfs*41 variant produced a predicted truncated protein that removes all functional domains of USH2A. The variant was not included in the 1000 Human Genomes Project database, ExAC database, HGMD or gnomAD database, but was included in the ClinVar databases as pathogenic. Although USH2A is an autosomal recessive disease, the effects of UPD should be informed in genetic counselling since the recurrence risk of an affected child is greatly reduced when the disease is due to the UPD mechanism. To test potential patients, WES, combined with STR analysis and homozygosity mapping, provides an accurate and useful strategy for genetic diagnosis. In summary, our discoveries can help further the understanding of the molecular pathogenesis of Usher syndrome type IIA to advance the prevention, diagnosis and therapy for this disorder.
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Affiliation(s)
- Jiewen Fu
- Key Laboratory of Epigenetics and Oncology, The Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, China
| | - Shiyi Shen
- Key Laboratory of Epigenetics and Oncology, The Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, China
| | - Jingliang Cheng
- Key Laboratory of Epigenetics and Oncology, The Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, China
| | - Hongbin Lv
- Department of Ophthalmology, The Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Junjiang Fu
- Key Laboratory of Epigenetics and Oncology, The Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, China
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Salehi Chaleshtori AR, Garshasbi M, Salehi A. A novel deletion mutation in GUCY2D gene may be responsible for Leber congenital amaurosis-1 disease: A case report. J Curr Ophthalmol 2019; 31:458-462. [PMID: 31844802 PMCID: PMC6896468 DOI: 10.1016/j.joco.2019.07.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Revised: 06/19/2019] [Accepted: 07/03/2019] [Indexed: 12/24/2022] Open
Abstract
Purpose To investigate genetic mutation(s) underlying retinal degeneration in a male patient. Methods A seven-year-old male patient was referred to receive genetic counseling and molecular testing. Clinical examination was performed by slit-lamp examination and electroretinography (ERG). Molecular testing was undertaken through arrayed-primer extension (APEX) and Sanger sequencing. Results Slit-lamp examination and flat ERG were in favor of Leber congenital amaurosis (LCA) disease as well as fundus findings. The genetic screening revealed two novel homozygote deletion and duplication variants in intron 15 and exon 16 of the GUCY2D gene. Segregation analysis in the family supports the probable contribution of these two novel mutations in clinical representations of the patient. Conclusions This report provides more information about LCA disease and its relevant mutations in Iran. Considering the overlapping phenotypes observed in retinal degenerative disorders, comprehensive molecular testing is needed for precise diagnosis.
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Affiliation(s)
| | - Masoud Garshasbi
- Department of Medical Genetics, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran
- Corresponding author. Department of Medical Genetics, Faculty of Medical Sciences, Tarbiat Modares University, P.O. Box 14115-331, Tehran, Iran.
| | - Ali Salehi
- Ophthalmology Center, Feiz Hospital, Isfahan University of Medical Sciences, Isfahan, Iran
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16
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Possible dual contribution of a novel GUCY2D mutation in the development of retinal degeneration in a consanguineous population. Eur J Med Genet 2019; 63:103750. [PMID: 31470097 DOI: 10.1016/j.ejmg.2019.103750] [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: 04/30/2019] [Revised: 08/21/2019] [Accepted: 08/24/2019] [Indexed: 11/22/2022]
Abstract
Molecular characterization of novel mutations in Leber Congenital Amaurosis (LCA) disease improves the disease diagnosis and contributes to the development of preventive and therapeutic approaches. We studied an isolated inbred population in Iran with a high prevalence of retinal degeneration with clinical variability. The clinical examinations were performed on eight patients belonging to three consanguineous families. The identical-by-descent (IBD) mapping technique was employed to identify the shared loci in patients. Subsequently, Sanger sequencing of the GUCY2D gene, in silico analysis, as well as segregation study were conducted. The whole-exome sequencing method was applied for negative cases of GUCY2D mutation, followed by segregation study in suspected variants among families. A novel deletion mutation in the GUCY2D gene can explain the emergence of LCA-1 in most patients but not all. Besides, a heterozygous variant of uncertain significance (VUS) was observed in the BEST1 gene in some healthy and participant patients. These results further support inter/intra-familial clinical heterogeneity in retinal dystrophy and suggest that screening the GUCY2D gene would be needed for the diagnosis of LCA in Iranian people living in the central regions. The variant in the BEST1 gene might be considered a benign heterozygous variant; however, we hypothesized a possible double heterozygosity in both GUCY2D and BEST1 genes that may cause the pathogenesis of cone-rod dystrophy-6 (CRD-6) disease. This would propose a new scenario for the pathogenesis of a monogenic disorder such as CRD-6 disease in which other genetic elements may be involved in the development of the disease.
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Imani S, Cheng J, Fu J, Mobasher-Jannat A, Wei C, Mohazzab-Torabi S, Jadidi K, Khosravi MH, Shasaltaneh MD, Yang L, Khan MA, Fu J. Novel splicing variant c. 208+2T>C in BBS5 segregates with Bardet-Biedl syndrome in an Iranian family by targeted exome sequencing. Biosci Rep 2019; 39:BSR20181544. [PMID: 30850397 PMCID: PMC6438871 DOI: 10.1042/bsr20181544] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Revised: 02/20/2019] [Accepted: 03/01/2019] [Indexed: 01/13/2023] Open
Abstract
Bardet-Biedl syndrome (BBS) is a rare genetically heterogeneous ciliopathy which accompanies retinitis pigmentosa (RP). However, the BBS5 mutation remains unclear in Iranians with BBS. The purpose of study is to evaluate genetic analyses of a BBS Iranian family using targetted exome sequencing (TES). A male 11-year-old proband and three related family members were recruited. Biochemical tests, electrocardiography and visual acuity testing, such as funduscopic, fundus photography (FP), optical coherence tomography (OCT), and standard electroretinography, were conducted. Molecular analysis and high-throughput DNA sequence analysis were performed. The proband was diagnosed with possible BBS based on the presence of three primary features and two secondary features. The TES analysis of the proband with BBS resulted in the identification of a novel, homozygous splicing variant c. 208+2T>C of the BBS5 gene (NM_152384.2) in this Iranian BBS family. This variant was confirmed and was completely co-segregated with the disease in this family by Sanger sequencing. Thus, we report a novel, homozygous splicing site variant c.208+2T>C in the BBS5 gene for the first time in the Iranian family.
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Affiliation(s)
- Saber Imani
- Key Laboratory of Epigenetics and Oncology, Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, Sichuan, China
| | - Jingliang Cheng
- Key Laboratory of Epigenetics and Oncology, Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, Sichuan, China
| | - Jiewen Fu
- Key Laboratory of Epigenetics and Oncology, Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, Sichuan, China
- Institute of Medical Technology, Xiangtan Medicine and Health Vocational College, Xiangtan, Hunan, China
| | | | - Chunli Wei
- Key Laboratory of Epigenetics and Oncology, Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, Sichuan, China
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Macau (SAR), China
| | | | - Khosrow Jadidi
- Department of Ophthalmology, Bina Eye Hospital Research Center, Tehran, Iran
| | | | | | - Lisha Yang
- Key Laboratory of Epigenetics and Oncology, Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, Sichuan, China
| | - Md Asaduzzaman Khan
- Key Laboratory of Epigenetics and Oncology, Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, Sichuan, China
| | - Junjiang Fu
- Key Laboratory of Epigenetics and Oncology, Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, Sichuan, China
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute for Applied Research in Medicine and Health, Macau University of Science and Technology, Macau (SAR), China
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18
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Huang J, Fu J, Fu S, Yang L, Nie K, Duan C, Cheng J, Li Y, Lv H, Chen R, Liu L, Fu J. Diagnostic value of a combination of next-generation sequencing, chorioretinal imaging and metabolic analysis: lessons from a consanguineous Chinese family with gyrate atrophy of the choroid and retina stemming from a novel OAT variant. Br J Ophthalmol 2018; 103:428-435. [PMID: 30366948 DOI: 10.1136/bjophthalmol-2018-312347] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2018] [Revised: 10/11/2018] [Accepted: 10/13/2018] [Indexed: 02/05/2023]
Abstract
BACKGROUND/AIM Gyrate atrophy of the choroid and retina (GACR) is an extremely rare autosomal recessive inherited disorder characterised by progressive vision loss. To identify the disease-causing gene in a consanguineous Chinese pedigree with GACR, we aimed to accurately diagnose patients with GACR through a combination of next-generation sequencing (NGS) genetic diagnosis, clinical imaging and amino acid metabolic analysis. METHODS A consanguineous Chinese pedigree with GACR, including two patients, was recruited and a comprehensive ophthalmological evaluation was performed. DNA was extracted from a proband and her family members, and the sample from the proband was analysed using targeted NGS. Variants detected by NGS were confirmed by Sanger sequencing and subjected to segregation analysis. Tandem mass spectrometry (MS/MS) was subsequently performed for metabolic assessment. RESULTS We identified a novel, deleterious, homologous ornithine aminotransferase (OAT) variant, c.G248A: p.S83N, which contributes to the progression of GACR in patients. Our results showed that the p.S83N autosomal recessive variant of OAT is most likely pathogenic, with changes in protein stability drastically decreasing functionality. MS/MS verified that ornithine levels in patients were significantly elevated. CONCLUSIONS Recruitment of a third-degree first cousin consanguineous marriage family with GACR allowed us to identify a novel pathogenic OAT variant in the Chinese population, broadening the mutation spectrum. Our findings reported the diagnostic value of a combination of NGS, retinal imaging and metabolic analysis of consanguineous marriage pedigrees in low-income/middle-income and low-incidence countries, including China, and may help to guide accurate diagnosis and treatment of this disease.
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Affiliation(s)
- Junting Huang
- Department of Ophthalmology, West China Hospital, Sichuan University, Chengdu, China
| | - Jiewen Fu
- Key Laboratory of Epigenetics and Oncology, Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, China
| | - Shangyi Fu
- The Honors College, University of Houston, Houston, Texas, USA.,Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
| | - Lisha Yang
- Key Laboratory of Epigenetics and Oncology, Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, China
| | - Kailai Nie
- Department of Ophthalmology, West China Hospital, Sichuan University, Chengdu, China
| | - Chengxia Duan
- Department of Ophthalmology, The Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Jingliang Cheng
- Key Laboratory of Epigenetics and Oncology, Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, China
| | - Yumei Li
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
| | - Hongbin Lv
- Department of Ophthalmology, The Affiliated Hospital of Southwest Medical University, Luzhou, China
| | - Rui Chen
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA
| | - Longqian Liu
- Department of Ophthalmology, West China Hospital, Sichuan University, Chengdu, China
| | - Junjiang Fu
- Key Laboratory of Epigenetics and Oncology, Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, China
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Wiegering A, Rüther U, Gerhardt C. The ciliary protein Rpgrip1l in development and disease. Dev Biol 2018; 442:60-68. [DOI: 10.1016/j.ydbio.2018.07.024] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 07/13/2018] [Accepted: 07/28/2018] [Indexed: 12/28/2022]
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20
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Fu J, Ma L, Cheng J, Yang L, Wei C, Fu S, Lv H, Chen R, Fu J. A novel, homozygous nonsense variant of the CDHR1 gene in a Chinese family causes autosomal recessive retinal dystrophy by NGS-based genetic diagnosis. J Cell Mol Med 2018; 22:5662-5669. [PMID: 30160356 PMCID: PMC6201214 DOI: 10.1111/jcmm.13841] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Revised: 07/05/2018] [Accepted: 07/15/2018] [Indexed: 01/10/2023] Open
Abstract
Retinal dystrophy is an inherited, heterogeneous, chronic and progressive disorder of visual functions. The mutations of patients with autosomal recessive retinal retinopathy cone‐and‐rod dysfunction and macular dystrophy have not been well described in the Chinese population. In this study, a three‐generation Chinese retinal dystrophy family was recruited. Ophthalmic examinations were performed. Targeted next generation sequencing (TGS) was used to identify causative genes, and Sanger sequencing was conducted to verify candidate mutations and co‐segregation. Reverse transcription (RT)‐PCR was applied to investigate the spatial and temporal expression patterns of cdhr1 gene in mouse. A novel, homozygous, deleterious and nonsense variant (c.T1641A; p.Y547*) in the CDHR1 gene was identified in the family with autosomal recessive retinal dystrophy, which was co‐segregated with the clinical phenotypes in this family. RT‐PCR analysis revealed that cdhr1 is ubiquitously expressed in eye, particularly very high expression in retina; high expression in lens, sclera, and cornea; and high expression in brain. In conclusion, our study is the first to indicate that the novel homozygous variant c.T1641A (p.Y547*) in the CHDR1 gene might be the disease‐causing mutation for retinal dystrophy in our patient, extending its mutation spectrums. These findings further the understanding of the molecular pathogenesis of this disease and provide new insights for diagnosis as well as new implications for genetic counselling.
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Affiliation(s)
- Jiewen Fu
- Key Laboratory of Epigenetics and Oncology, The Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, Sichuan, China.,Institute of Medical Technology, Xiangtan Medicine and Health Vocational College, Xiangtan, Hunan, China
| | - Lu Ma
- Key Laboratory of Epigenetics and Oncology, The Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, Sichuan, China
| | - Jingliang Cheng
- Key Laboratory of Epigenetics and Oncology, The Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, Sichuan, China
| | - Lisha Yang
- Key Laboratory of Epigenetics and Oncology, The Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, Sichuan, China
| | - Chunli Wei
- Key Laboratory of Epigenetics and Oncology, The Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, Sichuan, China
| | - Shangyi Fu
- The Honors College, University of Houston, Houston, Texas.,Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas
| | - Hongbin Lv
- Department of Ophthalmology, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, China
| | - Rui Chen
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas
| | - Junjiang Fu
- Key Laboratory of Epigenetics and Oncology, The Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, Sichuan, China
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Wei C, Yang L, Cheng J, Imani S, Fu S, Lv H, Li Y, Chen R, Leung ELH, Fu J. A novel homozygous variant of GPR98 causes usher syndrome type IIC in a consanguineous Chinese family by next generation sequencing. BMC MEDICAL GENETICS 2018; 19:99. [PMID: 29890953 PMCID: PMC5996530 DOI: 10.1186/s12881-018-0602-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/12/2018] [Accepted: 05/01/2018] [Indexed: 11/10/2022]
Abstract
BACKGROUND Usher syndrome (USH) is a common heterogeneous retinopathy and a hearing loss (HL) syndrome. However, the gene causing Usher syndrome type IIC (USH2C) in a consanguineous Chinese pedigree is unknown. METHODS We performed targeted next-generation sequencing analysis and Sanger sequencing to explore the GPR98 mutations in a USH2C pedigree that included a 32-year-old male patient from a consanguineous marriage family. Western blot verified the nonsense mutation. RESULTS To identify disease-causing gene variants in a consanguineous Chinese pedigree with USH2C, DNA from proband was analyzed using targeted next generation sequencing (NGS). The patient was clinically documented as a possible USH2 by a comprehensive auditory and ophthalmology evaluation. We succeeded in identifying the deleterious, novel, and homologous variant, c.6912dupG (p.Leu2305Valfs*4), in the GPR98 gene (NM_032119.3) that contributes to the progression of USH2C. Variant detected by targeted NGS was then confirmed and co-segregation was conducted by direct Sanger sequencing. Western blot verified losing almost two-thirds of its amino acid residues, including partial Calx-beta, whole EPTP and 7TM-GPCRs at the C-terminus of GPR98. Furthermore, our results highlighted that this p.Leu2305Valfs*4 variant is most likely pathogenic due to a large deletion at the seven-transmembrane G protein-coupled receptors (7TM-GPCRs) domain in GPR98 protein, leading to significantly decreased functionality and complex stability. CONCLUSIONS These findings characterized the novel disease causativeness variant in GPR98 and broaden mutation spectrums, which could predict the pathogenic progression of patient with USH2C, guide diagnosis and treatment of this disease; and provide genetic counseling and family planning for consanguineous marriage pedigree in developing countries, including China.
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Affiliation(s)
- Chunli Wei
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute For Applied Research in Medicine and Health, Macau University of Science and Technology, Taipa, Macao, Special Administrative Region of China.,Key Laboratory of Epigenetics and Oncology, Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, Sichuan, China
| | - Lisha Yang
- Key Laboratory of Epigenetics and Oncology, Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, Sichuan, China
| | - Jingliang Cheng
- Key Laboratory of Epigenetics and Oncology, Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, Sichuan, China
| | - Saber Imani
- Key Laboratory of Epigenetics and Oncology, Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, Sichuan, China.,Chemical Injuries Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - Shangyi Fu
- The Honors College, University of Houston, Houston, TX, USA.,Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Hongbin Lv
- Department of Ophthalmology, Affiliated Hospital of Southwest Medical University, Luzhou, Sichuan, China
| | - Yumei Li
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Rui Chen
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, 77030, USA
| | - Elaine Lai-Han Leung
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute For Applied Research in Medicine and Health, Macau University of Science and Technology, Taipa, Macao, Special Administrative Region of China. .,Guangzhou Institute of Respiratory Disease, State Key Laboratory of Respiratory Disease, The 1st Affiliated Hospital of Guangzhou Medical College, Guangzhou, China. .,Respiratoire Medicine Department, Taihe Hospital, Hubei University of Medicine, Hubei, China.
| | - Junjiang Fu
- State Key Laboratory of Quality Research in Chinese Medicine, Macau Institute For Applied Research in Medicine and Health, Macau University of Science and Technology, Taipa, Macao, Special Administrative Region of China. .,Key Laboratory of Epigenetics and Oncology, Research Center for Preclinical Medicine, Southwest Medical University, Luzhou, Sichuan, China.
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