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Cui Y, Li C, Wang H, Li L, Xie J, Zhou X, Zhang H, Sun J. Hemicentin-1 is an essential extracellular matrix component during tooth root formation by promoting mesenchymal cells differentiation. Front Cell Dev Biol 2024; 12:1435241. [PMID: 39050894 PMCID: PMC11266140 DOI: 10.3389/fcell.2024.1435241] [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: 05/20/2024] [Accepted: 06/18/2024] [Indexed: 07/27/2024] Open
Abstract
Introduction: Root dentin formation is an important process in tooth development. We tried to identify potential genes that regulate root dentin formation which could be potentially used for the regeneration and repair of defective or damaged dental roots. Methods: Tissues harvested from the labial and lingual sides of mouse incisors were used for microarray analysis. Gene ontology (GO) analysis of differentially expressed genes indicated the critical role of extracellular matrix in the discrepancy of dentin formation between root and crown, for which hemicentin-1 (Hmcn1) was selected as the target gene. Single-cell RNA sequencing analysis the expression pattern of Hmcn1 at different developmental stages in mouse molars. The spatiotemporal expression of HMCN1 in mouse incisors and molars was detected by immunohistochemical staining. The functions of HMCN1 in human dental pulp cells, including proliferation, differentiation and migration, were examined in vitro by CCK8 assay, BrdU assay, wound-healing assay, ALP staining and alizarin red staining, respectively. Results: It was showed that HMCN1 expression was more pronounced in papilla-pulp on the root than crown side in mouse incisors and molars. In vitro experiments presented inhibited dentinogenesis and migration after HMCN1-knockdown in human dental pulp cells, while there was no significant difference in proliferation between the HMCN1-knockdown group and control group. Discussion: These results indicated that HMCN1 plays an important role in dentinogenesis and migration of pulp cells, contributing to root dentin formation.
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Affiliation(s)
- Yujia Cui
- State Key Laboratory of Oral Diseases and National Center for Stomatology and National Clinical Research Center for Oral Diseases, Department of Pediatric Dentistry, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Chuwen Li
- State Key Laboratory of Oral Diseases and National Center for Stomatology and National Clinical Research Center for Oral Diseases, Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
- Shanghai Key Laboratory of Stomatology and Shanghai Research Institute of Stomatology and National Clinical Research Center for Oral Diseases and Shanghai Ninth People’s Hospital, College of Stomatology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Hanyang Wang
- State Key Laboratory of Oral Diseases and National Center for Stomatology and National Clinical Research Center for Oral Diseases, Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Lei Li
- State Key Laboratory of Oral Diseases and National Center for Stomatology and National Clinical Research Center for Oral Diseases, Department of Prosthodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Jing Xie
- State Key Laboratory of Oral Diseases and National Clinical Research Center for Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Xuedong Zhou
- State Key Laboratory of Oral Diseases and National Center for Stomatology and National Clinical Research Center for Oral Diseases, Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
| | - Hai Zhang
- School of Dentistry, University of Washington, Seattle, WA, United States
| | - Jianxun Sun
- State Key Laboratory of Oral Diseases and National Center for Stomatology and National Clinical Research Center for Oral Diseases, Department of Cariology and Endodontics, West China Hospital of Stomatology, Sichuan University, Chengdu, China
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2
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Li G, Wang J, Wu W, Wang M, Han X, Zhang Z, Tang C. Proteomic Analysis of the Supernatant from Bone Marrow Mesenchymal Stem Cells under High Glucose Conditions. J Proteome Res 2024; 23:344-355. [PMID: 38113133 DOI: 10.1021/acs.jproteome.3c00588] [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] [Indexed: 12/21/2023]
Abstract
Diabetes mellitus hinders the process of bone regeneration by inhibiting the function of mesenchymal stem cells (MSCs) through elevated glucose levels, thereby impeding osteointegration. The stem cell niche (SCN) plays a crucial role in determining the fate of stem cells by integrating various signals. However, the precise mechanism by which high glucose levels affect the SCN and subsequently influence the function of MSCs remains unclear. In this study, we employed proteomic analysis to identify proteins with altered expression in the extracellular matrix (ECM), aiming to elucidate the underlying mechanism. Three cell supernatants were collected from bone marrow mesenchymal stem cells (BMSCs) or BMSCs stimulated with high glucose (BMSCs+Hg). A total of 590 differentially expressed proteins were identified, which were found to be associated with the ECM, including aging, autophagy, and osteogenic differentiation. The findings of our study indicate that elevated glucose levels exert an influence on the molecular aspects of the SCN, potentially contributing to a better comprehension of the underlying mechanism.
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Affiliation(s)
- Guoqing Li
- Department of Dental Implantology, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing 210029, China
- Jiangsu Province Key Laboratory of Oral Diseases, Nanjing 210029, China
- Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing 210029, China
| | - Jiaohong Wang
- Department of Dental Implantology, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing 210029, China
- Jiangsu Province Key Laboratory of Oral Diseases, Nanjing 210029, China
- Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing 210029, China
| | - Wei Wu
- Department of Dental Implantology, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing 210029, China
- Jiangsu Province Key Laboratory of Oral Diseases, Nanjing 210029, China
- Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing 210029, China
| | - Mingxi Wang
- Department of Dental Implantology, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing 210029, China
- Jiangsu Province Key Laboratory of Oral Diseases, Nanjing 210029, China
- Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing 210029, China
| | - Xiao Han
- Jiangsu Province Key Laboratory of Oral Diseases, Nanjing 210029, China
- Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing 210029, China
| | - Zhewei Zhang
- Department of Dental Implantology, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing 210029, China
- Jiangsu Province Key Laboratory of Oral Diseases, Nanjing 210029, China
- Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing 210029, China
| | - Chunbo Tang
- Department of Dental Implantology, The Affiliated Stomatological Hospital of Nanjing Medical University, Nanjing 210029, China
- Jiangsu Province Key Laboratory of Oral Diseases, Nanjing 210029, China
- Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing 210029, China
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Increased end-stage renal disease risk in age-related macular degeneration: a nationwide cohort study with 10-year follow-up. Sci Rep 2023; 13:183. [PMID: 36604459 PMCID: PMC9814881 DOI: 10.1038/s41598-022-26964-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 12/22/2022] [Indexed: 01/06/2023] Open
Abstract
Common etiologies between age-related macular degeneration (AMD) and kidney disease advocate a close link between AMD and end-stage renal disease (ESRD). However, the risk of ESRD in people with AMD was not reported. Here, we investigated the association between AMD and the risk of ESRD by using a nationwide, population-based cohort data in Korea. 4,206,862 participants aged 50 years or older were categorized by presence of AMD and visual disability. Risk of ESRD was the primary outcome. Cox regression hazard model was used to examine the hazard ratios (HRs) with adjustment for potential confounders. Stratified analyses by age, sex, baseline kidney function, and cardiometabolic comorbidities were performed. During the mean 9.95 years of follow-up, there were 21,759 incident ESRD events (0.52%). AMD was associated with 33% increased risk of ESRD (adjusted HR [aHR] 1.33, 95% confidence interval [CI] 1.24-1.44), and the risk was even higher when accompanied by visual disability (aHR 2.05, 95% CI 1.68-2.50) than when not (aHR 1.26, 95% CI 1.17-1.37). Age, baseline kidney function, and cardiometabolic comorbidities significantly interact between AMD and the risk of ESRD. Our findings have clinical implications on disease prevention and risk factor management of ESRD in patients with AMD.
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Gong Z, Wu X, Guo Q, Du H, Zhang F, Kong Y. Comprehensive Analysis of HMCN1 Somatic Mutation in Clear Cell Renal Cell Carcinoma. Genes (Basel) 2022; 13:genes13071282. [PMID: 35886066 PMCID: PMC9316380 DOI: 10.3390/genes13071282] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 07/14/2022] [Accepted: 07/16/2022] [Indexed: 12/11/2022] Open
Abstract
Background: Renal cell carcinoma (RCC) is a common malignancy of the genitourinary system and clear cell renal cell carcinoma (ccRCC) is the most representative subtype. The morbidity and mortality of ccRCC have gradually risen during recent years; however, the pathogenesis and potential biomarkers remain unclear. The purpose of our study was to find out prognostic genes correlated with somatic mutation and the underlying mechanisms of HMCN1 mutation in ccRCC. Methods: Somatic mutation data of two ccRCC cohorts were acquired from TCGA and cBioPortal. Genes frequently mutated in both datasets were extracted, from which tumor mutation burden and survival analysis revealed three prognostic genes. Further comprehensive analysis of HMCN1 mutation was carried out to identify differentially expressed genes and apply functional annotations. The correlation of HMCN1 mutation and tumor immunity was also evaluated. Results: HMCN1, SYNE1, and BAP1 mutations were associated with both tumor mutation burden and clinical prognosis in ccRCC. Gene enrichment analysis suggested the effects of HMCN1 mutation on biological processes and pathways linked to energy metabolism. HMCN1 mutation was also correlated with anti-tumor immunity. There were several limitations in the sample size and cohort availability of the present computational study. Conclusions: The present results inferred that HMCN1 mutation might have an important clinical significance for ccRCC patients by regulating metabolism and the immune microenvironment.
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Hemicentin-1 is an essential extracellular matrix component of the dermal-epidermal and myotendinous junctions. Sci Rep 2021; 11:17926. [PMID: 34504132 PMCID: PMC8429575 DOI: 10.1038/s41598-021-96824-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Accepted: 08/04/2021] [Indexed: 11/09/2022] Open
Abstract
The extracellular matrix architecture is composed of supramolecular fibrillar networks that define tissue specific cellular microenvironments. Hemicentins (Hmcn1 and Hmcn2) are ancient and very large members (> 600 kDa) of the fibulin family, whose short members are known to guide proper morphology and functional behavior of specialized cell types predominantly in elastic tissues. However, the tissue distribution and function of Hemicentins within the cellular microenvironment of connective tissues has remained largely unknown. Performing in situ hybridization and immunofluorescence analyses, we found that mouse Hmcn1 and Hmcn2 show a complementary distribution throughout different tissues and developmental stages. In postnatal dermal–epidermal junctions (DEJ) and myotendinous junctions (MTJ), Hmcn1 is primarily produced by mesenchymal cells (fibroblasts, tenocytes), Hmcn2 by cells of epithelial origin (keratinocytes, myocytes). Hmcn1−/− mice are viable and show no overt phenotypes in tissue tensile strength and locomotion tests. However, transmission electron microscopy revealed ultrastructural basement membrane (BM) alterations at the DEJ and MTJ of Hmcn1−/− mice, pointing to a thus far unknown role of Hmcn1 for BM and connective tissue boundary integrity.
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Tsai YT, Li Y, Ryu J, Su PY, Cheng CH, Wu WH, Li YS, Quinn PMJ, Leong KW, Tsang SH. Impaired cholesterol efflux in retinal pigment epithelium of individuals with juvenile macular degeneration. Am J Hum Genet 2021; 108:903-918. [PMID: 33909993 PMCID: PMC8206198 DOI: 10.1016/j.ajhg.2021.04.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Accepted: 03/30/2021] [Indexed: 12/12/2022] Open
Abstract
Macular degeneration (MD) is characterized by the progressive deterioration of the macula and represents one of the most prevalent causes of blindness worldwide. Abnormal intracellular accumulation of lipid droplets and pericellular deposits of lipid-rich material in the retinal pigment epithelium (RPE) called drusen are clinical hallmarks of different forms of MD including Doyne honeycomb retinal dystrophy (DHRD) and age-related MD (AMD). However, the appropriate molecular therapeutic target underlying these disorder phenotypes remains elusive. Here, we address this knowledge gap by comparing the proteomic profiles of induced pluripotent stem cell (iPSC)-derived RPEs (iRPE) from individuals with DHRD and their isogenic controls. Our analysis and follow-up studies elucidated the mechanism of lipid accumulation in DHRD iRPE cells. Specifically, we detected significant downregulation of carboxylesterase 1 (CES1), an enzyme that converts cholesteryl ester to free cholesterol, an indispensable process in cholesterol export. CES1 knockdown or overexpression of EFEMP1R345W, a variant of EGF-containing fibulin extracellular matrix protein 1 that is associated with DHRD and attenuated cholesterol efflux and led to lipid droplet accumulation. In iRPE cells, we also found that EFEMP1R345W has a hyper-inhibitory effect on epidermal growth factor receptor (EGFR) signaling when compared to EFEMP1WT and may suppress CES1 expression via the downregulation of transcription factor SP1. Taken together, these results highlight the homeostatic role of cholesterol efflux in iRPE cells and identify CES1 as a mediator of cholesterol efflux in MD.
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Key Words
- age-related macular degeneration, Doyne honeycomb destrophy, DHRD, cholesterol efflux, drusen, RPE, CRISPR, isogenic, EGFR signaling, unfolded protein response, lipid accumulation
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Affiliation(s)
- Yi-Ting Tsai
- Department of Biomedical Engineering, Columbia University, New York, NY 10032, USA
| | - Yao Li
- Jonas Children's Vision Care and the Bernard & Shirlee Brown Glaucoma Laboratory, Department of Ophthalmology, Columbia Stem Cell Initiative, Columbia University, New York, NY 10032, USA; Edward S. Harkness Eye Institute, New York-Presbyterian Hospital, New York, NY 10032, USA
| | - Joseph Ryu
- Jonas Children's Vision Care and the Bernard & Shirlee Brown Glaucoma Laboratory, Department of Ophthalmology, Columbia Stem Cell Initiative, Columbia University, New York, NY 10032, USA; Edward S. Harkness Eye Institute, New York-Presbyterian Hospital, New York, NY 10032, USA
| | - Pei-Yin Su
- Jonas Children's Vision Care and the Bernard & Shirlee Brown Glaucoma Laboratory, Department of Ophthalmology, Columbia Stem Cell Initiative, Columbia University, New York, NY 10032, USA; Edward S. Harkness Eye Institute, New York-Presbyterian Hospital, New York, NY 10032, USA
| | - Chia-Hua Cheng
- Jonas Children's Vision Care and the Bernard & Shirlee Brown Glaucoma Laboratory, Department of Ophthalmology, Columbia Stem Cell Initiative, Columbia University, New York, NY 10032, USA; Edward S. Harkness Eye Institute, New York-Presbyterian Hospital, New York, NY 10032, USA
| | - Wen-Hsuan Wu
- Jonas Children's Vision Care and the Bernard & Shirlee Brown Glaucoma Laboratory, Department of Ophthalmology, Columbia Stem Cell Initiative, Columbia University, New York, NY 10032, USA; Edward S. Harkness Eye Institute, New York-Presbyterian Hospital, New York, NY 10032, USA
| | - Yong-Shi Li
- Jonas Children's Vision Care and the Bernard & Shirlee Brown Glaucoma Laboratory, Department of Ophthalmology, Columbia Stem Cell Initiative, Columbia University, New York, NY 10032, USA; Edward S. Harkness Eye Institute, New York-Presbyterian Hospital, New York, NY 10032, USA
| | - Peter M J Quinn
- Jonas Children's Vision Care and the Bernard & Shirlee Brown Glaucoma Laboratory, Department of Ophthalmology, Columbia Stem Cell Initiative, Columbia University, New York, NY 10032, USA; Edward S. Harkness Eye Institute, New York-Presbyterian Hospital, New York, NY 10032, USA
| | - Kam W Leong
- Department of Biomedical Engineering, Columbia University, New York, NY 10032, USA
| | - Stephen H Tsang
- Jonas Children's Vision Care and the Bernard & Shirlee Brown Glaucoma Laboratory, Department of Ophthalmology, Columbia Stem Cell Initiative, Columbia University, New York, NY 10032, USA; Edward S. Harkness Eye Institute, New York-Presbyterian Hospital, New York, NY 10032, USA; Department of Pathology & Cell Biology, Institute of Human Nutrition, College of Physicians and Surgeons, Columbia University, New York, NY 10032, USA.
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Histopathology of Age-Related Macular Degeneration and Implications for Pathogenesis and Therapy. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2021. [PMID: 33847998 DOI: 10.1007/978-3-030-66014-7_3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/30/2023]
Abstract
Aging is associated with a number of histological changes in the choroid, Bruch's membrane, RPE, and neuroretina. Outside of the normal physiologic aging spectrum of changes, abnormal deposits such as basal laminar deposits, basal linear deposits, and soft drusen are known to be associated with AMD. Progression of AMD to advanced stages involving geographic atrophy, choroidal neovascularization, and/or disciform scars can result in debilitating vision loss. Knowledge of the angiogenic pathway and its components that stimulate neovascularization has led to the development of a new paradigm of intravitreal anti-VEGF pharmacotherapy in the management of neovascular AMD. Currently however, there are no available treatments for the modification of disease progression in non-neovascular AMD, or for the treatment of geographic atrophy. Further understanding of the histopathology of AMD and the molecular mechanisms that contribute to pathogenesis of the disease may reveal additional therapeutic targets.
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8
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Miao X, Liu W, Fan B, Lin H. Transcriptomic Heterogeneity of Alzheimer's Disease Associated with Lipid Genetic Risk. Neuromolecular Med 2020; 22:534-541. [PMID: 32862331 DOI: 10.1007/s12017-020-08610-6] [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: 09/06/2019] [Accepted: 08/21/2020] [Indexed: 10/23/2022]
Abstract
Alzheimer's disease (AD) is a multifactorial disease that affects more than 5 million Americans. Multiple pathways might be involved in the AD pathogenesis. The implication of lipid genetic susceptibility on brain gene expression is yet to be investigated. The current study included 192 brain samples from AD patients who were enrolled in the ROSMAP study. The samples were genotyped and imputed to the HRC Reference Panel. Lipid polygenetic risk score was constructed from the weighted sum of genetic variants associated with low-density lipoprotein cholesterol (LDL-C). The gene expression was profiled by RNA sequencing, and the association of gene expression with lipid polygenetic risk scores was tested by linear regression models adjusted for age, sex and APOE e4 alleles. Three genes were found to associate with lipid polygenetic risk scores, including HMCN2 (P = 3.6 × 10-7), PDLIM5 (P = 1.2 × 10-6), and FHL5 (P = 2.0 × 10-6). Network analysis revealed multiple related pathways, including dopaminergic synapse (P = 4.5 × 10-5), circadian entrainment (P = 1.1 × 10-4), and cholinergic synapse (P = 2.3 × 10-4). Our study underscores the importance of lipid regulation and metabolism to AD heterogeneity.
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Affiliation(s)
- Xiao Miao
- Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
- Innovation Research Institute of Traditional Chinese Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Weifeng Liu
- Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Bin Fan
- Yueyang Hospital of Integrated Traditional Chinese and Western Medicine, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Honghuang Lin
- Section of Computational Biomedicine, Department of Medicine, Boston University School of Medicine, 72 East Concord Street, E-632, Boston, MA, 02118, USA.
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Yamashiro K, Hosoda Y, Miyake M, Takahashi A, Ooto S, Tsujikawa A. Hypothetical pathogenesis of age-related macular degeneration and pachychoroid diseases derived from their genetic characteristics. Jpn J Ophthalmol 2020; 64:555-567. [PMID: 33006732 DOI: 10.1007/s10384-020-00773-w] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Accepted: 05/16/2020] [Indexed: 12/20/2022]
Abstract
Genetic studies have investigated the pathogenesis of age-related macular degeneration (AMD). The pachychoroid concept has recently garnered attention as a possible explanation for AMD pathogenesis; the genetic characteristics of pachychoroid diseases have also been elucidated. In this review, we summarize previously reported genetic characteristics of AMD and pachychoroid diseases, and analyze these data to understand the pathogenesis of AMD and pachychoroid diseases. Previous studies show that VIPR2 and the CFH I62V A allele promote development of pachychoroid and central serous chorioretinopathy (CSC), while the CFH I62V G allele promotes development of drusen, pachychoroid neovasculopathy (PCN/PNV), and AMD. ARMS2/HTRA1 also promotes development of drusen, PCN/PNV, and AMD. TNFRSF10A and GATA5 are associated with CSC but not with pachychoroid, and TNFRSF10A is associated with AMD that includes PCN/PNV. These genetic characteristics suggest the following mechanisms of developing AMD and pachychoroid diseases. VIPR2 and the CFH I62V A allele promote pachychoroid development, which can result in CSC development. The CFH I62V G allele promotes a common step during PCN/PNV and AMD development induced by pachychoroid or drusen, such as damage of Bruch's membrane or retinal pigment epithelium (RPE). ARMS2/HTRA1 also promotes damage of Bruch's membrane or RPE, while the association with drusen formation is stronger in ARMS2/HTRA1 than in CFH. TNFRSF10A and GATA5 promote blood-retinal-barrier breakdown to induce CSC, which could lead to PCN/PNV development. Furthermore, recently reported genetic associations with the natural course of CSC suggest the importance of reconsidering the subtype classification of CSC. These associations would enable the development of personalized/precision medicine for CSC and.
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Affiliation(s)
- Kenji Yamashiro
- Department of Ophthalmology and Visual Sciences, Kyoto University Graduate School of Medicine, 54 Kawahara, Shogoin, Sakyo, Kyoto, 606-8507, Japan.
- Department of Ophthalmology, Japanese Red Cross Otsu Hospital, Otsu, Japan.
| | - Yoshikatsu Hosoda
- Department of Ophthalmology and Visual Sciences, Kyoto University Graduate School of Medicine, 54 Kawahara, Shogoin, Sakyo, Kyoto, 606-8507, Japan
| | - Masahiro Miyake
- Department of Ophthalmology and Visual Sciences, Kyoto University Graduate School of Medicine, 54 Kawahara, Shogoin, Sakyo, Kyoto, 606-8507, Japan
| | - Ayako Takahashi
- Department of Ophthalmology and Visual Sciences, Kyoto University Graduate School of Medicine, 54 Kawahara, Shogoin, Sakyo, Kyoto, 606-8507, Japan
| | - Sotaro Ooto
- Department of Ophthalmology and Visual Sciences, Kyoto University Graduate School of Medicine, 54 Kawahara, Shogoin, Sakyo, Kyoto, 606-8507, Japan
| | - Akitaka Tsujikawa
- Department of Ophthalmology and Visual Sciences, Kyoto University Graduate School of Medicine, 54 Kawahara, Shogoin, Sakyo, Kyoto, 606-8507, Japan
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10
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Park A, Qiu Z, Lee M, Lewis K, Cross M, Baur O, Brice S, Whiteley L. Triple and quadruple mutation of RGD motif using CRISPR-Cas9 in him-4 locus of Caenorhabditis elegans. MICROPUBLICATION BIOLOGY 2020; 2020:10.17912/micropub.biology.000249. [PMID: 32550508 PMCID: PMC7252390 DOI: 10.17912/micropub.biology.000249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
| | | | - Myeongwoo Lee
- Baylor University Department of Biology,
Correspondence to: Myeongwoo Lee ()
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11
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Lin MH, Pope BD, Sasaki T, Keeley DP, Sherwood DR, Miner JH. Mammalian hemicentin 1 is assembled into tracks in the extracellular matrix of multiple tissues. Dev Dyn 2020; 249:775-788. [PMID: 32035013 DOI: 10.1002/dvdy.159] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 01/20/2020] [Accepted: 01/31/2020] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Hemicentins (HMCNs) are a family of extracellular matrix proteins first identified in Caenorhabditis elegans, with two orthologs (HMCN1 and 2) in vertebrates. In worms, HMCN is deposited at specific sites where it forms long, fine tracks that link two tissues by connecting adjacent basement membranes (BMs). By generating CRISPR/Cas9-mediated Hmcn1 and Hmcn2 knockout mice, we tested the hypothesis that HMCNs perform similar functions in mammals. RESULTS Hmcn1 -/- mice were viable and fertile. Using new, knockout mouse-validated HMCN1 antibodies, HMCN1 was detected in wild-type mice as fine tracks along the BM of hair and whisker follicles, in the sclera of the eyes, and in the lumen of some lymphoid conduits. It was also observed in the mesangial matrix of the kidney glomerulus. However, HMCN1 deficiency did not affect the functions of these tissues, including adherence of coat hairs and whiskers, the sieving function of lymphoid conduits, or the immune response to injected antigens. HMCN2 deficiency did not lead to any discernible phenotypes on its own or when combined with HMCN1 deficiency. CONCLUSION That Hmcn1 -/- , Hmcn2 -/- , and Hmcn1/2 double knockout mice did not display any overt phenotypes implicates compensation by other members of the fibulin family.
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Affiliation(s)
- Meei-Hua Lin
- Division of Nephrology, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Bill D Pope
- Division of Nephrology, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Takako Sasaki
- Department of Biochemistry II, Oita University, Oita, Japan
| | - Daniel P Keeley
- Department of Biology, Regeneration Next, Duke University, Durham, North Carolina, USA
| | - David R Sherwood
- Department of Biology, Regeneration Next, Duke University, Durham, North Carolina, USA
| | - Jeffrey H Miner
- Division of Nephrology, Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, USA.,Department of Cell Biology and Physiology, Washington University School of Medicine, St. Louis, Missouri, USA
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12
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Lan H, Wang X, Jiang L, Wu J, Wan X, Zeng L, Zhang D, Lin Y, Hou C, Wu S, Tse YC. An extracellular matrix protein promotes anillin-dependent processes in the Caenorhabditis elegans germline. Life Sci Alliance 2019; 2:2/2/e201800152. [PMID: 30988161 PMCID: PMC6467243 DOI: 10.26508/lsa.201800152] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Revised: 04/04/2019] [Accepted: 04/04/2019] [Indexed: 01/25/2023] Open
Abstract
The extracellular matrix protein Hemicentin (HIM-4) is an extracellular factor that regulates anillin (ANI-1) for germ cell membrane stabilization and contractile ring formation in C.elegans germline cells. Cell division requires constriction of an actomyosin ring to segregate the genetic material equally into two daughter cells. The spatial and temporal regulation of the contractile ring at the division plane primarily depends on intracellular signals mediated by the centralspindlin complex and astral microtubules. Although much investigative work has elucidated intracellular factors and mechanisms controlling this process, the extracellular regulation of cytokinesis remains unclear. Thus far, the extracellular matrix protein Hemicentin (HIM-4) has been proposed to be required for cleavage furrow stabilization. The underlying molecular mechanism, however, has remained largely unknown. Here, we show that HIM-4 and anillin (ANI-1) genetically act in the same pathway to maintain the rachis bridge stability in the germline. Our FRAP experiments further reveal that HIM-4 restricts the motility of ANI-1. In addition, we demonstrate that HIM-4 is recruited to the cleavage site in dividing germ cells and promotes the proper ingression of the cleavage membrane. Collectively, we propose that HIM-4 is an extracellular factor that regulates ANI-1 for germ cell membrane stabilization and contractile ring formation in Caenorhabditis elegans germline cells.
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Affiliation(s)
- Hongxia Lan
- Department of Biology, Southern University of Science and Technology (SUSTech), Shenzhen, China.,State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai University, Tianjin, P.R. China
| | - Xinyan Wang
- Department of Biology, Southern University of Science and Technology (SUSTech), Shenzhen, China.,Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, SUSTech, Shenzhen, China.,Centre of Reproduction, Development and Aging, Faculty of Health Sciences, University of Macau, Macau, China
| | - Ling Jiang
- Department of Biology, Southern University of Science and Technology (SUSTech), Shenzhen, China.,Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, SUSTech, Shenzhen, China
| | - Jianjian Wu
- Department of Biology, Southern University of Science and Technology (SUSTech), Shenzhen, China
| | - Xuan Wan
- Department of Biology, Southern University of Science and Technology (SUSTech), Shenzhen, China.,Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, SUSTech, Shenzhen, China
| | - Lidan Zeng
- Department of Biology, Southern University of Science and Technology (SUSTech), Shenzhen, China
| | - Dandan Zhang
- Department of Biology, Southern University of Science and Technology (SUSTech), Shenzhen, China.,Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, SUSTech, Shenzhen, China
| | - Yiyan Lin
- Department of Biology, Southern University of Science and Technology (SUSTech), Shenzhen, China
| | - Chunhui Hou
- Department of Biology, Southern University of Science and Technology (SUSTech), Shenzhen, China
| | - Shian Wu
- State Key Laboratory of Medicinal Chemical Biology, College of Life Sciences, Nankai University, Tianjin, P.R. China
| | - Yu Chung Tse
- Department of Biology, Southern University of Science and Technology (SUSTech), Shenzhen, China .,Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen Key Laboratory of Cell Microenvironment, SUSTech, Shenzhen, China
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Keeley DP, Sherwood DR. Tissue linkage through adjoining basement membranes: The long and the short term of it. Matrix Biol 2019; 75-76:58-71. [PMID: 29803937 PMCID: PMC6252152 DOI: 10.1016/j.matbio.2018.05.009] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Revised: 05/18/2018] [Accepted: 05/21/2018] [Indexed: 01/01/2023]
Abstract
Basement membranes (BMs) are thin dense sheets of extracellular matrix that surround most tissues. When the BMs of neighboring tissues come into contact, they usually slide along one another and act to separate tissues and organs into distinct compartments. However, in certain specialized regions, the BMs of neighboring tissues link, helping to bring tissues together. These BM connections can be transient, such as during tissue fusion events in development, or long-term, as with adult tissues involved with filtration, including the blood brain barrier and kidney glomerulus. The transitory nature of these connections in development and the complexity of tissue filtration systems in adults have hindered the understanding of how juxtaposed BMs fasten together. The recent identification of a BM-BM adhesion system in C. elegans, termed B-LINK (BM linkage), however, is revealing cellular and extracellular matrix components of a nascent tissue adhesion system. We discuss insights gained from studying the B-LINK tissue adhesion system in C. elegans, compare this adhesion with other BM-BM connections in Drosophila and vertebrates, and outline important future directions towards elucidating this fascinating and poorly understood mode of adhesion that joins neighboring tissues.
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Affiliation(s)
- Daniel P Keeley
- Department of Biology, Regeneration Next, Duke University, Box 90338, Durham, NC 27708, USA
| | - David R Sherwood
- Department of Biology, Regeneration Next, Duke University, Box 90338, Durham, NC 27708, USA.
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Toffoli B, Zennaro C, Winkler C, Giordano Attianese GMP, Bernardi S, Carraro M, Gilardi F, Desvergne B. Hemicentin 1 influences podocyte dynamic changes in glomerular diseases. Am J Physiol Renal Physiol 2018; 314:F1154-F1165. [DOI: 10.1152/ajprenal.00198.2017] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/10/2022] Open
Abstract
Different complex mechanisms control the morphology of podocyte foot processes and their interactions with the underlying basement membrane. Injuries to this system often cause glomerular dysfunction and albuminuria. The present study aimed at identifying early markers of glomerular damage in diabetic nephropathy. For this purpose, we performed a microarray analysis on kidneys of 3-wk-old peroxisome proliferator-activated receptor-γ (PPARγ)-null and AZIP/F1 mice, which are two models of diabetic nephropathy due to lipodystrophy. This was followed by functional annotation of the enriched clusters of genes. One of the significant changes in the early stages of glomerular damage was the increase of hemicentin 1 (HMCN1). Its expression and distribution were then studied by real-time PCR and immunofluorescence in various models of glomerular damage and on podocyte cell cultures. HMCN1 progressively increased in the glomeruli of diabetic mice, according to disease severity, as well as in puromycin aminonucleoside (PA)-treated rats. Studies on murine and human podocytes showed an increased HMCN1 deposition upon different pathological stimuli, such as hyperglycemia, transforming growth factor-β (TGF-β), and PA. In vitro silencing studies showed that HMCN1 mediated the rearrangements of podocyte cytoskeleton induced by TGF-β. Finally, we demonstrated an increased expression of HMCN1 in the kidneys of patients with proteinuric nephropathies. In summary, our studies identified HMCN1 as a new molecule involved in the dynamic changes of podocyte foot processes. Its increased expression associated with podocyte dysfunction points to HMCN1 as a possible marker for the early glomerular damage occurring in different proteinuric nephropathies.
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Affiliation(s)
- Barbara Toffoli
- Center for Integrative Genomics, Faculty of Biology and Medicine, University of Lausanne, Lausanne, Switzerland
| | - Cristina Zennaro
- Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy
| | - Carine Winkler
- Center for Integrative Genomics, Faculty of Biology and Medicine, University of Lausanne, Lausanne, Switzerland
| | | | - Stella Bernardi
- Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy
| | - Michele Carraro
- Department of Medical, Surgical and Health Sciences, University of Trieste, Trieste, Italy
| | - Federica Gilardi
- Center for Integrative Genomics, Faculty of Biology and Medicine, University of Lausanne, Lausanne, Switzerland
| | - Béatrice Desvergne
- Center for Integrative Genomics, Faculty of Biology and Medicine, University of Lausanne, Lausanne, Switzerland
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15
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Leisy HB, Ahmad M, Marmor M, Smith RT. Association between Decreased Renal Function and Reticular Macular Disease in Age-Related Macular Degeneration. Ophthalmol Retina 2017; 1:42-48. [PMID: 31047393 DOI: 10.1016/j.oret.2016.08.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Revised: 08/12/2016] [Accepted: 08/12/2016] [Indexed: 10/20/2022]
Abstract
PURPOSE To compare renal function in patients with age-related macular degeneration (AMD) with and without concurrent reticular macular disease (RMD). DESIGN Retrospective cohort study. PARTICIPANTS Patients with documented AMD with and without RMD. METHODS Via our electronic health record system, we retrospectively identified patients assigned an International Classification of Diseases, Ninth Edition, code associated with AMD between January 2012 and January 2016. Patients met inclusion criteria if they had at least 1 macular spectral-domain optical coherence tomography volume scan, 1 provider note, and 1 glomerular filtration rate (GFR) value in the electronic medical record. We evaluated images for the presence or absence of RMD; we defined RMD as the presence of at least 1 subretinal drusenoid deposit in at least 1 macular slice. Patients with RMD in at least 1 eye were deemed RMD positive. Patients with bilateral choroidal neovascularization were excluded from analysis. MAIN OUTCOME MEASURE Observation of renal function in RMD patients. RESULTS Inclusion criteria were met by 119 patients (mean age, 75 years; range, 46-101 years). To account for the significant difference in RMD prevalence at extreme ages, we limited our study population to 107 patients 50 to 90 years of age. A GFR less than 60 ml/min/1.73 m2 was found in 45.0% (27/60) of those with RMD compared with 12.8% (6/47) of those without RMD (odds ratio, 5.6; 95% confidence interval, 2.1-15). Multivariate logistic regression indicated that low GFR was a significant predictor for RMD, even after accounting for differences in age, diabetes, hypertension, hyperlipidemia, and other potential confounders. When comparing within classification subsets for RMD and GFR in patients with choroidal thickness data, significant choroidal thinning was associated with RMD (170 vs. 228 μm; P = 0.01) and GFR less than 60 ml/min/1.73 m2 (144 vs. 219 μm; P = 0.0008). CONCLUSIONS Our analysis showed an association between RMD and renal dysfunction. Larger cross-sectional and longitudinal studies of the association of RMD with kidney function are warranted to better understand the nature and biological basis of this observed connection.
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Affiliation(s)
- Heather B Leisy
- Department of Ophthalmology, New York University School of Medicine, New York, New York.
| | - Meleha Ahmad
- Department of Ophthalmology, New York University School of Medicine, New York, New York
| | - Michael Marmor
- Departments of Population Health, Environmental Medicine, and Medicine, New York University School of Medicine, New York, New York
| | - R Theodore Smith
- Department of Ophthalmology, New York University School of Medicine, New York, New York
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Lambert NG, ElShelmani H, Singh MK, Mansergh FC, Wride MA, Padilla M, Keegan D, Hogg RE, Ambati BK. Risk factors and biomarkers of age-related macular degeneration. Prog Retin Eye Res 2016; 54:64-102. [PMID: 27156982 DOI: 10.1016/j.preteyeres.2016.04.003] [Citation(s) in RCA: 230] [Impact Index Per Article: 28.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2015] [Revised: 04/01/2016] [Accepted: 04/12/2016] [Indexed: 02/03/2023]
Abstract
A biomarker can be a substance or structure measured in body parts, fluids or products that can affect or predict disease incidence. As age-related macular degeneration (AMD) is the leading cause of blindness in the developed world, much research and effort has been invested in the identification of different biomarkers to predict disease incidence, identify at risk individuals, elucidate causative pathophysiological etiologies, guide screening, monitoring and treatment parameters, and predict disease outcomes. To date, a host of genetic, environmental, proteomic, and cellular targets have been identified as both risk factors and potential biomarkers for AMD. Despite this, their use has been confined to research settings and has not yet crossed into the clinical arena. A greater understanding of these factors and their use as potential biomarkers for AMD can guide future research and clinical practice. This article will discuss known risk factors and novel, potential biomarkers of AMD in addition to their application in both academic and clinical settings.
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Affiliation(s)
- Nathan G Lambert
- Ambati Lab, John A. Moran Eye Center, 65 Mario Capecchi Drive, Salt Lake City, UT, USA; Department of Ophthalmology & Visual Sciences, University of Utah, 65 Mario Capecchi Drive, Salt Lake City, UT, USA.
| | - Hanan ElShelmani
- Ocular Development and Neurobiology Research Group, Zoology Department, School of Natural Sciences, University of Dublin, Trinity College, Dublin 2, Ireland.
| | - Malkit K Singh
- Ambati Lab, John A. Moran Eye Center, 65 Mario Capecchi Drive, Salt Lake City, UT, USA; Department of Ophthalmology & Visual Sciences, University of Utah, 65 Mario Capecchi Drive, Salt Lake City, UT, USA.
| | - Fiona C Mansergh
- Smurfit Institute of Genetics, Trinity College Dublin, Dublin 2, Ireland.
| | - Michael A Wride
- Ocular Development and Neurobiology Research Group, Zoology Department, School of Natural Sciences, University of Dublin, Trinity College, Dublin 2, Ireland.
| | - Maximilian Padilla
- Ambati Lab, John A. Moran Eye Center, 65 Mario Capecchi Drive, Salt Lake City, UT, USA; Department of Ophthalmology & Visual Sciences, University of Utah, 65 Mario Capecchi Drive, Salt Lake City, UT, USA.
| | - David Keegan
- Mater Misericordia Hospital, Eccles St, Dublin 7, Ireland.
| | - Ruth E Hogg
- Centre for Experimental Medicine, Institute of Clinical Science Block A, Grosvenor Road, Belfast, Co.Antrim, Northern Ireland, UK.
| | - Balamurali K Ambati
- Ambati Lab, John A. Moran Eye Center, 65 Mario Capecchi Drive, Salt Lake City, UT, USA; Department of Ophthalmology & Visual Sciences, University of Utah, 65 Mario Capecchi Drive, Salt Lake City, UT, USA.
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Høeg TB, Klein R, Moldow B, La Cour M, Klemp K, Erngaard D, Buch H, Ellervik C. THE ASSOCIATION BETWEEN CUTICULAR DRUSEN AND KIDNEY FUNCTION: A Population-Based Case-Control Study. Retina 2016; 36:896-900. [PMID: 27115854 DOI: 10.1097/iae.0000000000000808] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
PURPOSE To determine the association between cuticular drusen (CD) and kidney function. DESIGN observational case-control study. METHODS SETTING Population-based. Patients or Study Population: 53 participants with (CD) and 53 age- and sex-matched controls, selected from the Danish Rural Eye Study. Cuticular drusen participants were diagnosed using fluorescein angiography and controls were excluded if the patients were suspected of having CD on fundus photography or did not have an available estimated glomerular filtration rate. MAIN OUTCOME MEASURES creatinine and estimated glomerular filtration rate. RESULTS The mean estimated glomerular filtration rate of those with CD was 73.3 mL·min·1.73 m (95% confidence interval [CI]: 70.0-76.6) and 73.4 mL·minute·1.73 m (95% CI: 69.5-77.3) in controls. The difference was not significant (P: 0.970). The mean creatinine among those with CD was 72.8 μmol/L (69.3-76.4) and 73.5 μmol/L (95% CI: 69.3-77.6) among controls. The difference was not significant (P = 0.820). CONCLUSION The authors did not find an association between a (CD) diagnosis and decreased kidney function at a population level.
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Affiliation(s)
- Tracy B Høeg
- *Department of Ophthalmology, Næstved Hospital, Næstved, Denmark;†The Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark;‡Department of Ophthalmology and Visual Sciences, University of Wisconsin-Madison, Madison, Wisconsin;§Department of Ophthalmology, Capital Region Eye Clinic, Glostrup, Denmark; and¶Department of General Population Study, Nykøbing-Falster Hospital, Nykøbing Falster, Denmark
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Sergejeva O, Botov R, Liutkevičienė R, Kriaučiūnienė L. Genetic factors associated with the development of age-related macular degeneration. MEDICINA-LITHUANIA 2016; 52:79-88. [PMID: 27170480 DOI: 10.1016/j.medici.2016.02.004] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Revised: 10/01/2015] [Accepted: 02/13/2016] [Indexed: 12/12/2022]
Abstract
Age-related macular degeneration (AMD) affects the macula and is the leading cause of significant and irreversible central visual loss. It is the most common cause of visual loss in people aged more than 60 years. This disease affects 2.5 million individuals in Europe. AMD is caused by both environmental and genetic factors. Numerous risk factors have been reported, but the pathogenesis of AMD is complex and fairly understood. Age, female gender, obesity, race, education status, family history, hyperopia, iris color, cigarette smoking, previous cataract surgery, history of cardiovascular and cerebrovascular disease, diabetes, sunlight exposure and many other factors have been shown to be associated with AMD development. Scientific evidence shows that genes may play a role in the development of nearly 3 out of 4 cases of this devastating eye disease. The genes that have been shown to be associated with AMD are genes encoding complement system components such as CFH, C2, C3, CFB, and other.
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Affiliation(s)
- Olga Sergejeva
- Department of Ophthalmology, Medical Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania.
| | - Roman Botov
- Faculty of Medicine, Medical Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Rasa Liutkevičienė
- Department of Ophthalmology, Medical Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania; Laboratory of Ophthalmology, Neuroscience Institute, Medical Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania
| | - Loresa Kriaučiūnienė
- Laboratory of Ophthalmology, Neuroscience Institute, Medical Academy, Lithuanian University of Health Sciences, Kaunas, Lithuania
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Malattia Leventinese/Doyne Honeycomb Retinal Dystrophy: Similarities to Age-Related Macular Degeneration and Potential Therapies. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2016; 854:153-8. [PMID: 26427406 DOI: 10.1007/978-3-319-17121-0_21] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
Abstract
Fibulin-3 (F3) is a secreted, disulfide-rich glycoprotein which is expressed in a variety of tissues within the body, including the retina. An Arg345Trp (R345W) mutation in F3 was identified as the cause of a rare retinal dystrophy, Malattia Leventinese/Doyne Honeycomb Retinal Dystrophy (ML/DHRD). ML/DHRD shares many phenotypic similarities with age-related macular degeneration (AMD). The most prominent feature of ML/DHRD is the development of radial or honeycomb patterns of drusen which can develop as early as adolescence. Two independent mouse models of ML/DHRD show evidence of complement activation as well as retinal pigment epithelium (RPE) atrophy, strengthening the phenotypic connection with AMD. Because of its similarities with AMD, ML/DHRD is receiving increasing interest as a potential surrogate disease to study the underpinnings of AMD. This mini-review summarizes the current knowledge of F3 and points toward potential therapeutic strategies which directly or indirectly target cellular dysfunction associated with R345W F3.
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20
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Morrissey MA, Sherwood DR. An active role for basement membrane assembly and modification in tissue sculpting. J Cell Sci 2015; 128:1661-8. [PMID: 25717004 DOI: 10.1242/jcs.168021] [Citation(s) in RCA: 78] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Basement membranes are a dense, sheet-like form of extracellular matrix (ECM) that underlie epithelia and endothelia, and surround muscle, fat and Schwann cells. Basement membranes separate tissues and protect them from mechanical stress. Although traditionally thought of as a static support structure, a growing body of evidence suggests that dynamic basement membrane deposition and modification instructs coordinated cellular behaviors and acts mechanically to sculpt tissues. In this Commentary, we highlight recent studies that support the idea that far from being a passive matrix, basement membranes play formative roles in shaping tissues.
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Affiliation(s)
- Meghan A Morrissey
- Department of Biology, Duke University, Science Drive, Box 90388, Durham, NC 27708, USA
| | - David R Sherwood
- Department of Biology, Duke University, Science Drive, Box 90388, Durham, NC 27708, USA
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B-LINK: a hemicentin, plakin, and integrin-dependent adhesion system that links tissues by connecting adjacent basement membranes. Dev Cell 2014; 31:319-331. [PMID: 25443298 DOI: 10.1016/j.devcel.2014.08.024] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Revised: 07/15/2014] [Accepted: 08/27/2014] [Indexed: 01/08/2023]
Abstract
Basement membrane (BM), a sheet-like form of extracellular matrix, surrounds most tissues. During organogenesis, specific adhesions between adjoining tissues frequently occur; however, their molecular basis is unclear. Using live-cell imaging and electron microscopy, we identify an adhesion system that connects the uterine and gonadal tissues through their juxtaposed BMs at the site of anchor cell (AC) invasion in C. elegans. We find that the extracellular matrix component hemicentin (HIM-4), found between BMs, forms punctate accumulations under the AC and controls BM linkage to promote rapid invasion. Through targeted screening, we identify the integrin-binding cytolinker plakin (VAB-10A) and integrin (INA-1/PAT-3) as key BM-BM linkage regulators: VAB-10A localizes to the AC-BM interface and tethers hemicentin to the AC while integrin promotes hemicentin punctae formation. Together, plakin, integrin, and hemicentin are founding components of a cell-directed adhesion system, which we name a BM-LINKage (B-LINK), that connects adjacent tissues through adjoining BMs.
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Abstract
PURPOSE Age-related macular degeneration (AMD) and chronic kidney disease both involve immune dysregulation and may share underlying pathophysiologic changes to systemic homeostasis. Hence, we aim to evaluate associations between impaired kidney function and early AMD, in a search for urinary biomarkers for AMD. METHODS A population-based, cross-sectional analysis of persons aged 45 to 84 years was conducted with renal function measured using serum creatinine and cystatin C levels and the estimated glomerular filtration rate (eGFR) calculated. Age-related macular degeneration status was ascertained from retinal photographs. RESULTS Of 5874 participants, 221 had early AMD. High serum cystatin C and low eGFR (≤60 ml/min/1.73 m) were not associated with early AMD in our multivariate analyses. Among normotensive persons, however, highest versus other deciles of cystatin C were associated with an increased prevalence of early AMD (odds ratio, 1.80; 95% confidence interval, 1.00 to 3.23). CONCLUSIONS Results could not confirm an association between kidney function and early AMD. The borderline association between cystatin C and early AMD in normotensive persons require further verification.
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JANUCHOWSKI RADOSŁAW, ZAWIERUCHA PIOTR, RUCIŃSKI MARCIN, ZABEL MACIEJ. Microarray-based detection and expression analysis of extracellular matrix proteins in drug-resistant ovarian cancer cell lines. Oncol Rep 2014; 32:1981-90. [DOI: 10.3892/or.2014.3468] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2014] [Accepted: 08/18/2014] [Indexed: 11/05/2022] Open
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Klein BEK, Howard KP, Iyengar SK, Sivakumaran TA, Meyers KJ, Cruickshanks KJ, Klein R. Sunlight exposure, pigmentation, and incident age-related macular degeneration. Invest Ophthalmol Vis Sci 2014; 55:5855-61. [PMID: 25125603 DOI: 10.1167/iovs.14-14602] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
PURPOSE Examine potential effects of sunlight exposure, hair color, eye color, and selected gene single-nucleotide polymorphisms (SNPs) on incidence of AMD. METHODS Subjects participated in up to five examinations over a 20-year period. Eye color, self-reported hair color as a teenager, and sunlight exposure were ascertained at the baseline examination. Presence and severity of AMD and its lesions were determined via fundus photographs. Genetic data were available on a subset of participants. The SNPs CFH Y402H rs1061170 and ARMS2 A69S rs10490924 were used to analyze genetic risk of AMD; OCA2 rs4778241 and HERC2 rs12913832 represented genetic determinants of eye color. RESULTS Incidence of early AMD was higher in blond/red-haired persons compared with brown/black-haired persons (hazard ratio [HR] 1.25, P = 0.02) and in persons with high sun exposure in their thirties (HR 1.41, P = 0.02). However, neither was significant after adjustment for multiple comparisons. Eye (HR 1.36, P = 0.006) and hair color (HR 1.42, P = 0.003) were associated with incidence of any retinal pigmentary abnormalities (RPAs). Both remained significant after adjustment for multiple comparisons. Neither presence of alleles for light-colored eyes nor those associated with high risk of late AMD altered the association of eye or hair color with early AMD. None of the characteristics studied were significantly associated with late AMD. CONCLUSIONS Modest associations of eye color, hair color, and HERC2 genotype with any RPAs were found. Genes for AMD did not affect these associations. Eye color phenotype was more strongly associated with outcomes than HERC2 or OCA2 genotype.
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Affiliation(s)
- Barbara E K Klein
- Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, United States
| | - Kerri P Howard
- Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, United States
| | - Sudha K Iyengar
- Departments of Epidemiology & Biostatistics, Genetics & Genome Sciences and Ophthalmology & Visual Sciences, Case Western Reserve University, Cleveland, Ohio, United States
| | - Theru A Sivakumaran
- Departments of Epidemiology & Biostatistics, Genetics & Genome Sciences and Ophthalmology & Visual Sciences, Case Western Reserve University, Cleveland, Ohio, United States Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, United States
| | - Kristin J Meyers
- Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, United States
| | - Karen J Cruickshanks
- Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, United States Department of Population Health Sciences, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, United States
| | - Ronald Klein
- Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, United States
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25
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Myers CE, Klein BEK, Gangnon R, Sivakumaran TA, Iyengar SK, Klein R. Cigarette smoking and the natural history of age-related macular degeneration: the Beaver Dam Eye Study. Ophthalmology 2014; 121:1949-55. [PMID: 24953792 DOI: 10.1016/j.ophtha.2014.04.040] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2013] [Revised: 02/18/2014] [Accepted: 04/25/2014] [Indexed: 11/27/2022] Open
Abstract
PURPOSE To examine the association of current cigarette smoking and pack-years smoked with the incidence and progression of age-related macular degeneration (AMD) and to examine the interactions of current smoking and pack-years smoked with complement factor H (CFH, rs1061170) and age-related maculopathy susceptibility 2 (ARMS2, rs10490924) genotype. DESIGN A longitudinal population-based study of AMD in a representative American community. Examinations were performed every 5 years over a 20-year period. PARTICIPANTS A total of 4439 participants in the population-based Beaver Dam Eye Study (BDES). METHODS Age-related macular degeneration status was determined from grading retinal photographs. Multi-state models were used to model the relationship of current smoking and pack-years smoked and interactions with CFH and ARMS2 with the incidence and progression of AMD over the entire age range. MAIN OUTCOME MEASURES Incidence and progression of AMD over a 20-year period and interactions between current smoking and pack-years smoked with CFH and ARMS2 genotype. RESULTS The incidence of early AMD over the 20-year period was 24.4%, and the incidence of late AMD was 4.5%. Current smoking was associated with an increased risk of transitioning from minimal to moderate early AMD. A greater number of pack-years smoked was associated with an increased risk of transitioning from no AMD to minimal early AMD and from severe early AMD to late AMD. Current smoking and a greater number of pack-years smoked were associated with an increased risk of death. There were no statistically significant multiplicative interactions between current smoking or pack-years smoked and CFH or ARMS2 genotype. CONCLUSIONS Current smoking and a greater number of pack-years smoked increase the risk of the progression of AMD. This has important health care implications because smoking is a modifiable behavior.
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Affiliation(s)
- Chelsea E Myers
- Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin.
| | - Barbara E K Klein
- Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Ronald Gangnon
- Department of Biostatistics and Medical Informatics, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin; Population Health Sciences, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
| | - Theru A Sivakumaran
- Department of Epidemiology & Biostatistics, Genetics and Ophthalmology, Case Western Reserve University, Cleveland, Ohio
| | - Sudha K Iyengar
- Department of Epidemiology & Biostatistics, Genetics and Ophthalmology, Case Western Reserve University, Cleveland, Ohio; Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Ronald Klein
- Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin
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Cheung CMG, Li X, Cheng CY, Zheng Y, Mitchell P, Wang JJ, Wong TY. Prevalence, racial variations, and risk factors of age-related macular degeneration in Singaporean Chinese, Indians, and Malays. Ophthalmology 2014; 121:1598-603. [PMID: 24661862 DOI: 10.1016/j.ophtha.2014.02.004] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2013] [Revised: 02/06/2014] [Accepted: 02/06/2014] [Indexed: 11/28/2022] Open
Abstract
OBJECTIVE To describe the prevalence and risk factors for age-related macular degeneration (AMD) in a multiethnic Asian cohort of Chinese, Malay, and Indian persons. DESIGN Population-based cross-sectional study. PARTICIPANTS A total of 10 033 persons (3280 Malay, 3400 Indian, and 3353 Chinese; response rate, 75%) 40 years of age or older residing in Singapore. METHODS We performed comprehensive systemic and ocular examinations, retinal photography, and laboratory investigations for all participants. We graded early and late AMD signs from retinal photographs using the modified Wisconsin AMD grading scale. We calculated the age-standardized prevalence of AMD using the 2010 Singapore adult population and analyzed risk factors for AMD using logistic regression models. MAIN OUTCOME MEASURES Early and late AMD. RESULTS Of the 9799 participants with gradable photographs, 588 had early AMD and 60 had late AMD. The age-standardized prevalence was 5.1% (95% confidence interval [CI], 4.6-5.5) for early AMD and 0.5% (95% CI, 0.4-0.6) for late AMD. The prevalence of early AMD was similar between Chinese (5.7%) and Indian (4.5%; P = 0.27) persons and lower in Malays (3.5%; P = 0.002 compared with Chinese; P = 0.09 compared with Indians); in contrast, the prevalence for late AMD was similar across ethnic groups (Chinese, 0.6%; Indian, 0.3%; and Malay, 0.3%; P = 0.20). Risk factors for early AMD were older age (odds ratio [OR], 1.40 per 5-year increase in age; 95% CI, 1.33-1.47), male gender (OR, 1.81; 95% CI, 1.43-2.29), hypertension (OR, 1.28; 95% CI, 1.02-1.61), and hyperopic refraction (OR, 1.17 per 1-diopter increase in spherical equivalent; 95% CI, 1.11-1.24). Risk factors for late AMD include older age (OR, 1.87 per 5-year increase in age; 95% CI, 1.54-2.19), smoking more than 5 packs per week (OR, 3.63; 95% CI, 1.34-9.80), and presence of chronic kidney disease (OR, 2.17; 95% CI, 1.22-3.88). CONCLUSIONS Early AMD is more common in Chinese and Indians than in Malays, but there were no racial variations in the prevalence of late AMD.
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Affiliation(s)
- Chui Ming Gemmy Cheung
- Singapore National Eye Center, Singapore, Republic of Singapore; Singapore Eye Research Institute, Singapore, Republic of Singapore; Saw Swee Hock School of Public Health and Department of Ophthalmology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Republic of Singapore.
| | - Xiang Li
- Singapore Eye Research Institute, Singapore, Republic of Singapore; Department of Statistics and Applied Probability, National University of Singapore, Singapore, Republic of Singapore
| | - Ching-Yu Cheng
- Singapore Eye Research Institute, Singapore, Republic of Singapore; Saw Swee Hock School of Public Health and Department of Ophthalmology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Republic of Singapore
| | - Yingfeng Zheng
- Singapore Eye Research Institute, Singapore, Republic of Singapore
| | - Paul Mitchell
- Center for Vision Research, University of Sydney, Sydney, Australia
| | - Jie Jin Wang
- Center for Vision Research, University of Sydney, Sydney, Australia; Center for Eye Research Australia, University of Melbourne, Royal Victorian Eye and Ear Hospital, Victoria, Melbourne, Australia
| | - Tien Yin Wong
- Singapore National Eye Center, Singapore, Republic of Singapore; Singapore Eye Research Institute, Singapore, Republic of Singapore; Saw Swee Hock School of Public Health and Department of Ophthalmology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Republic of Singapore; Center for Eye Research Australia, University of Melbourne, Royal Victorian Eye and Ear Hospital, Victoria, Melbourne, Australia
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Complement factor H and related proteins in age-related macular degeneration. C R Biol 2014; 337:178-84. [DOI: 10.1016/j.crvi.2013.12.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Accepted: 12/03/2013] [Indexed: 12/17/2022]
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Klein R, Myers CE, Meuer SM, Gangnon RE, Sivakumaran TA, Iyengar SK, Lee KE, Klein BEK. Risk alleles in CFH and ARMS2 and the long-term natural history of age-related macular degeneration: the Beaver Dam Eye Study. JAMA Ophthalmol 2013; 131:383-92. [PMID: 23494043 DOI: 10.1001/jamaophthalmol.2013.713] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
OBJECTIVE To describe the relationships of risk alleles in complement factor H (CFH, rs1061170) and age-related maculopathy susceptibility 2 (ARMS2, rs10490924) to the incidence and progression of age-related macular degeneration (AMD) during a 20-year period. METHODS There were 4282 persons aged 43 to 86 years at the baseline examination in 1988-1990 enrolled in a population-based cohort study who participated in at least 1 examination spaced 5 years apart during a 20-year period and had gradable fundus photographs for AMD and genotype information on CFH and ARMS2. Low, intermediate, and high genetic risk for AMD was defined by the presence of 0 to 1, 2, or 3 to 4 risk alleles for CFH and ARMS2, respectively. Multistate models were used to estimate the progression of AMD throughout the entire age range. RESULTS There were 2820 (66%), 1129 (26%), and 333 persons (8%) with low, intermediate, and high genetic risk for AMD, respectively. The 5-year incidences of early and late AMD were 9.1% and 1.6%, respectively, and increased with age but did not differ significantly by sex. Using the multistate model, of persons aged 45 years with no AMD in the low, intermediate, and high AMD genetic risk groups, 33.0%, 39.9%, and 46.5%, respectively, were estimated to develop early AMD, and 1.4%, 5.2%, and 15.3% were estimated to develop late AMD by age 80 years. CONCLUSIONS These population-based data provide estimates of the long-term risk of the incidence and progression of AMD and its lesions by age and genetic risk alleles for CFH and ARMS2. They also show that when early AMD is present, knowing the phenotype contributes more to risk assessment than knowing the genetic risk based on these 2 AMD genes.
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Affiliation(s)
- Ronald Klein
- Departments of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, WI 53726, USA.
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Klein R, Cruickshanks KJ, Myers CE, Sivakumaran TA, Iyengar SK, Meuer SM, Schubert CR, Gangnon RE, Klein BEK. The relationship of atherosclerosis to the 10-year cumulative incidence of age-related macular degeneration: the Beaver Dam studies. Ophthalmology 2013; 120:1012-9. [PMID: 23399375 DOI: 10.1016/j.ophtha.2012.11.003] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Revised: 10/30/2012] [Accepted: 11/02/2012] [Indexed: 10/27/2022] Open
Abstract
OBJECTIVE To describe the relationships of intima-media thickness (IMT), plaque in the carotid artery, angina, myocardial infarction (MI), and stroke to the 10-year cumulative incidence of early and late age-related macular degeneration (AMD) and progression of AMD. DESIGN Cohort study. PARTICIPANTS A total of 1700 persons aged 53 to 96 years who participated in both the Epidemiology of Hearing Loss Study and the Beaver Dam Eye Study in 1998-2000, with photographs gradable for AMD at 5-year (2003-2005) and 10-year (2008-2010) follow-up examinations. METHODS The IMT and presence of plaque were assessed using B-mode ultrasonography of the carotid artery. Presence of angina, MI, and stroke were defined on the basis of a self-reported history of physician diagnosis. The presence and severity of AMD were determined by systematic grading of stereoscopic color fundus photographs. MAIN OUTCOME MEASURES Age-related macular degeneration. RESULTS The 10-year cumulative incidence of early AMD was 15.7%, and the 10-year cumulative incidence of late AMD was 4.0%. After adjusting for age, sex, body mass index, smoking status, age-related maculopathy susceptibility 2 (ARMS2) and complement factor H (CFH) genotypes, and other factors, mean IMT was associated with the 10-year incidence of early AMD (odds ratio [OR] per 0.1 mm IMT, 1.11; 95% confidence interval [CI], 1.00-1.21; P = 0.03) and late AMD (OR per 0.1 mm IMT, 1.27; CI, 1.10-1.47; P = 0.001). Mean IMT was associated with the 10-year incidence of pure geographic atrophy (OR per 0.1 mm IMT, 1.31; CI, 1.05-1.64; P = 0.02) but not exudative AMD (OR per 0.1 mm IMT, 1.14; CI, 0.97-1.34; P = 0.11). Similar associations were found for maximum IMT. The number of sites with plaque was related to the incidence of late AMD (OR per 0.1 mm IMT, 2.79 for 4-6 sites vs. none; CI, 1.06-7.37; P = 0.04) but not to early AMD. A history of angina, MI, or stroke was not related to any incident AMD outcome. CONCLUSIONS In these population-based data, carotid artery IMT and carotid plaques had a weak relationship to the incidence of late AMD that was independent of systemic and genetic risk factors. Angina, MI, and stroke were not related to AMD. It is unclear whether the carotid IMT is a risk indicator of processes affecting Bruch's membrane and the retinal pigment epithelium, or a measure of atherosclerosis affecting susceptibility to AMD. FINANCIAL DISCLOSURE(S) The author(s) have no proprietary or commercial interest in any materials discussed in this article.
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Affiliation(s)
- Ronald Klein
- Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin 53726, USA.
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Mantel I, Ambresin A, Moetteli L, Droz I, Roduit R, Munier FL, Schorderet DF. Complement factor B polymorphism and the phenotype of early age-related macular degeneration. Ophthalmic Genet 2013; 35:12-7. [PMID: 23373431 DOI: 10.3109/13816810.2013.766217] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
PURPOSE Age-related macular degeneration (AMD) has been associated with a number of polymorphisms in genes in the complement pathway. We examined the potential genotype-phenotype correlation of complement factor B (CFB) (R32Q) polymorphisms in Caucasian patients with AMD. METHODS Data from a Central European cohort of 349 patients with early AMD in at least one eye were analyzed for potential associations of the CFB (R32Q/rs641153) polymorphism with phenotypic features of early AMD. Early AMD was classified according to the International Classification and Grading System into predominant drusen size, largest drusen, drusen covered surface, central or ring-like location, peripheral drusen, and pigmentary changes. The potential association with single nucleotide polymorphisms on CFB (R32Q/rs641153) was evaluated for all patients, corrected for age, sex, and the polymorphisms of CFH (Y402H) and ARMS2 (A69S). RESULTS CFB (R32Q) polymorphisms showed a significant association with smaller drusen size (largest drusen ≤ 250 µm, p = 0.021, predominant drusen ≤ 125 µm, p = 0.016), with smaller surface covered by drusen (≤ 10%; p = 0.02), and with more frequent occurrence of peripheral drusen (p = 0.007). No association was found for pigmentary changes. CONCLUSIONS The CFB (R32Q) polymorphism was associated with AMD characterized by small drusen only, and appeared to be protective of large drusen (OR 0.48/0.45) and of larger drusen covered area (OR 0.34). Furthermore, peripheral drusen were more frequently found (OR 2.27). This result supports the role of complement components and their polymorphisms in drusen formation and may enable a better understanding of AMD pathogenesis.
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Affiliation(s)
- Irmela Mantel
- Department of Ophthalmology, University of Lausanne, Jules-Gonin Eye Hospital , Switzerland , and
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Miller JW. Age-related macular degeneration revisited--piecing the puzzle: the LXIX Edward Jackson memorial lecture. Am J Ophthalmol 2013; 155:1-35.e13. [PMID: 23245386 DOI: 10.1016/j.ajo.2012.10.018] [Citation(s) in RCA: 180] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2012] [Revised: 10/19/2012] [Accepted: 10/23/2012] [Indexed: 12/11/2022]
Abstract
PURPOSE To present the current understanding of age-related macular degeneration (AMD) pathogenesis, based on clinical evidence, epidemiologic data, histopathologic examination, and genetic data; to provide an update on current and emerging therapies; and to propose an integrated model of the pathogenesis of AMD. DESIGN Review of published clinical and experimental studies. METHODS Analysis and synthesis of clinical and experimental data. RESULTS We are closer to a complete understanding of the pathogenesis of AMD, having progressed from clinical observations to epidemiologic observations and clinical pathologic correlation. More recently, modern genetic and genomic studies have facilitated the exploration of molecular pathways. It seems that AMD is a complex disease that results from the interaction of genetic susceptibility with aging and environmental factors. Disease progression also seems to be driven by a combination of genetic and environmental factors. CONCLUSIONS Therapies based on pathophysiologic features have changed the paradigm for treating neovascular AMD. With improved understanding of the underlying genetic susceptibility, we can identify targets to halt early disease and to prevent progression and vision loss.
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Choi J, Moon JW, Shin HJ. Chronic Kidney Disease, Early Age-related Macular Degeneration, and Peripheral Retinal Drusen. Ophthalmic Epidemiol 2011; 18:259-63. [DOI: 10.3109/09286586.2011.602509] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Sivakumaran TA, Igo RP, Kidd JM, Itsara A, Kopplin LJ, Chen W, Hagstrom SA, Peachey NS, Francis PJ, Klein ML, Chew EY, Ramprasad VL, Tay WT, Mitchell P, Seielstad M, Stambolian DE, Edwards AO, Lee KE, Leontiev DV, Jun G, Wang Y, Tian L, Qiu F, Henning AK, LaFramboise T, Sen P, Aarthi M, George R, Raman R, Das MK, Vijaya L, Kumaramanickavel G, Wong TY, Swaroop A, Abecasis GR, Klein R, Klein BEK, Nickerson DA, Eichler EE, Iyengar SK. A 32 kb critical region excluding Y402H in CFH mediates risk for age-related macular degeneration. PLoS One 2011; 6:e25598. [PMID: 22022419 PMCID: PMC3192039 DOI: 10.1371/journal.pone.0025598] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2011] [Accepted: 09/06/2011] [Indexed: 12/16/2022] Open
Abstract
Complement factor H shows very strong association with Age-related Macular Degeneration (AMD), and recent data suggest that multiple causal variants are associated with disease. To refine the location of the disease associated variants, we characterized in detail the structural variation at CFH and its paralogs, including two copy number polymorphisms (CNP), CNP147 and CNP148, and several rare deletions and duplications. Examination of 34 AMD-enriched extended families (N = 293) and AMD cases (White N = 4210 Indian = 134; Malay = 140) and controls (White N = 3229; Indian = 117; Malay = 2390) demonstrated that deletion CNP148 was protective against AMD, independent of SNPs at CFH. Regression analysis of seven common haplotypes showed three haplotypes, H1, H6 and H7, as conferring risk for AMD development. Being the most common haplotype H1 confers the greatest risk by increasing the odds of AMD by 2.75-fold (95% CI = [2.51, 3.01]; p = 8.31×10(-109)); Caucasian (H6) and Indian-specific (H7) recombinant haplotypes increase the odds of AMD by 1.85-fold (p = 3.52×10(-9)) and by 15.57-fold (P = 0.007), respectively. We identified a 32-kb region downstream of Y402H (rs1061170), shared by all three risk haplotypes, suggesting that this region may be critical for AMD development. Further analysis showed that two SNPs within the 32 kb block, rs1329428 and rs203687, optimally explain disease association. rs1329428 resides in 20 kb unique sequence block, but rs203687 resides in a 12 kb block that is 89% similar to a noncoding region contained in ΔCNP148. We conclude that causal variation in this region potentially encompasses both regulatory effects at single markers and copy number.
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Affiliation(s)
- Theru A. Sivakumaran
- Department of Epidemiology and Biostatistics, Case Western Reserve University, Cleveland, Ohio, United States of America
- Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio, United States of America
| | - Robert P. Igo
- Department of Epidemiology and Biostatistics, Case Western Reserve University, Cleveland, Ohio, United States of America
| | - Jeffrey M. Kidd
- Department of Genome Sciences, University of Washington, Seattle, Washington, United States of America
| | - Andy Itsara
- Department of Genome Sciences, University of Washington, Seattle, Washington, United States of America
| | - Laura J. Kopplin
- Department of Genetics, Case Western Reserve University, Cleveland, Ohio, United States of America
| | - Wei Chen
- Department of Biostatistics, Center for Statistical Genetics, University of Michigan School of Public Health, Ann Arbor, Michigan, United States of America
| | - Stephanie A. Hagstrom
- Cole Eye Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
- Department of Ophthalmology, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, Ohio, United States of America
| | - Neal S. Peachey
- Cole Eye Institute, Cleveland Clinic, Cleveland, Ohio, United States of America
- Department of Ophthalmology, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, Ohio, United States of America
- Research Service, Louis Stokes Cleveland Department of Veterans Affairs Medical Center, Cleveland, Ohio, United States of America
| | - Peter J. Francis
- Casey Eye Institute, Oregon Health & Science University, Portland, Oregon, United States of America
| | - Michael L. Klein
- Casey Eye Institute, Oregon Health & Science University, Portland, Oregon, United States of America
| | - Emily Y. Chew
- Division of Epidemiology and Clinical Applications, National Eye Institute, Bethesda, Maryland, United States of America
| | - Vedam L. Ramprasad
- SNONGC Department of Genetics and Molecular Biology, Vision Research Foundation, Sankara Nethralaya, Chennai, India
| | - Wan-Ting Tay
- Singapore Eye Research Institute, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Paul Mitchell
- Centre for Vision Research, University of Sydney, Sydney, Australia
| | | | - Dwight E. Stambolian
- Departments of Ophthalmology and Genetics, University of Pennsylvania, Philadelphia, Pennsylvania, United States of America
| | - Albert O. Edwards
- Institute of Molecular Biology, University of Oregon, Eugene, Oregon, United States of America
| | - Kristine E. Lee
- Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, United States of America
| | - Dmitry V. Leontiev
- Department of Epidemiology and Biostatistics, Case Western Reserve University, Cleveland, Ohio, United States of America
| | - Gyungah Jun
- Department of Epidemiology and Biostatistics, Case Western Reserve University, Cleveland, Ohio, United States of America
- Department of Medicine, Boston University, Boston, Massachusetts, United States of America
- Department of Ophthalmology, Boston University, Boston, Massachusetts, United States of America
- Department of Biostatistics, Boston University, Boston, Massachusetts, United States of America
| | - Yang Wang
- Department of Epidemiology and Biostatistics, Case Western Reserve University, Cleveland, Ohio, United States of America
| | - Liping Tian
- Department of Epidemiology and Biostatistics, Case Western Reserve University, Cleveland, Ohio, United States of America
| | - Feiyou Qiu
- Department of Epidemiology and Biostatistics, Case Western Reserve University, Cleveland, Ohio, United States of America
| | - Alice K. Henning
- The EMMES Corporation, Rockville, Maryland, United States of America
| | - Thomas LaFramboise
- Department of Genetics, Case Western Reserve University, Cleveland, Ohio, United States of America
| | - Parveen Sen
- Department of Medical Retina, Vision Research Foundation, Sankara Nethralaya, Chennai, India
| | - Manoharan Aarthi
- SNONGC Department of Genetics and Molecular Biology, Vision Research Foundation, Sankara Nethralaya, Chennai, India
| | - Ronnie George
- Department of Glaucoma, Vision Research Foundation, Sankara Nethralaya, Chennai, India
| | - Rajiv Raman
- Department of Medical Retina, Vision Research Foundation, Sankara Nethralaya, Chennai, India
| | - Manmath Kumar Das
- Department of Medical Retina, Vision Research Foundation, Sankara Nethralaya, Chennai, India
| | - Lingam Vijaya
- Department of Medical Retina, Vision Research Foundation, Sankara Nethralaya, Chennai, India
| | - Govindasamy Kumaramanickavel
- SNONGC Department of Genetics and Molecular Biology, Vision Research Foundation, Sankara Nethralaya, Chennai, India
| | - Tien Y. Wong
- Singapore Eye Research Institute, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
- Centre for Eye Research Australia, University of Melbourne, East Melbourne, Australia
| | - Anand Swaroop
- Neurobiology Neurodegeneration and Repair Laboratory, National Eye Institute, Bethesda, Maryland, United States of America
- Kellogg Eye Center and Department of Human Genetics, University of Michigan, Ann Arbor, Michigan, United States of America
| | - Goncalo R. Abecasis
- Department of Biostatistics, Center for Statistical Genetics, University of Michigan School of Public Health, Ann Arbor, Michigan, United States of America
| | - Ronald Klein
- Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, United States of America
| | - Barbara E. K. Klein
- Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, Madison, Wisconsin, United States of America
| | - Deborah A. Nickerson
- Department of Genome Sciences, University of Washington, Seattle, Washington, United States of America
| | - Evan E. Eichler
- Department of Genome Sciences, University of Washington, Seattle, Washington, United States of America
- Howard Hughes Medical Institute, University of Washington, Seattle, Washington, United States of America
| | - Sudha K. Iyengar
- Department of Epidemiology and Biostatistics, Case Western Reserve University, Cleveland, Ohio, United States of America
- Department of Genetics, Case Western Reserve University, Cleveland, Ohio, United States of America
- Department of Ophthalmology, Case Western Reserve University, Cleveland, Ohio, United States of America
- * E-mail:
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Kim S, Abboud HE, Pahl MV, Tayek J, Snyder S, Tamkin J, Alcorn H, Ipp E, Nast CC, Elston RC, Iyengar SK, Adler SG. Examination of association with candidate genes for diabetic nephropathy in a Mexican American population. Clin J Am Soc Nephrol 2010; 5:1072-8. [PMID: 20299368 PMCID: PMC2879299 DOI: 10.2215/cjn.06550909] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2009] [Accepted: 02/10/2010] [Indexed: 12/18/2022]
Abstract
BACKGROUND AND OBJECTIVES Diabetic nephropathy (DN) is a multifactorial complication characterized by persistent proteinuria in susceptible individuals with type 1 and type 2 diabetes. Disease burden in people of Mexican-American descent is particularly high, but there are only a few studies that characterize genes for DN in this ethnic group. Two genes, carnosine dipeptidase 1 (CNDP1) and engulfment and cell motility 1 (ELMO1) previously showed association with DN in other ethnic groups. CNDP1 and ELMO1 were examined along with eight other genes that are less well characterized for DN in a new study of Mexican-Americans. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS The target sample was patients of Mexican-American ancestry collected from three centers: 455 patients with DN and 437 controls with long-term diabetes but no incident nephropathy. Forty-two, 227, and 401 single nucleotide polymorphisms (SNPs) in CNDP1, ELMO1, and the other eight genes, respectively, were examined. RESULTS No region in CNDP1 or ELMO1 showed significant P values. Of the other eight candidate genes, an association of DN with a SNP pair, rs2146098 and rs6659783, was found in hemicentin 1 (HMCN1) (unadjusted P = 6.1 x 10(-5)). Association with a rare haplotype in this region was subsequently identified. CONCLUSIONS The associations in CNDP1 or ELMO1 were not replicable; however, an association of DN with HMCN1 was found. Additional work at this and other loci will enable refinement of the genetic hypotheses regarding DN in the Mexican-American population to find therapies for this debilitating disease.
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Affiliation(s)
- Sulgi Kim
- Department of Epidemiology and Biostatistics, Case Western Reserve University, Cleveland, Ohio
| | | | - Madeleine V. Pahl
- Division of Nephrology and Hypertension, University of California–Irvine, Irvine, California
| | - John Tayek
- Los Angeles Biomedical Research Institute at Harbor–UCLA Medical Center, Torrance, California
| | - Susan Snyder
- Los Angeles Biomedical Research Institute at Harbor–UCLA Medical Center, Torrance, California
| | - James Tamkin
- Providence Medical Institute, Torrance, California; and
| | - Harry Alcorn
- DaVita Clinical Research, Minneapolis, Minnesota
| | - Eli Ipp
- Los Angeles Biomedical Research Institute at Harbor–UCLA Medical Center, Torrance, California
| | - Cynthia C. Nast
- Los Angeles Biomedical Research Institute at Harbor–UCLA Medical Center, Torrance, California
| | - Robert C. Elston
- Department of Epidemiology and Biostatistics, Case Western Reserve University, Cleveland, Ohio
| | - Sudha K. Iyengar
- Department of Epidemiology and Biostatistics, Case Western Reserve University, Cleveland, Ohio
| | - Sharon G. Adler
- Los Angeles Biomedical Research Institute at Harbor–UCLA Medical Center, Torrance, California
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Abstract
Age-related macular degeneration (AMD) is a complex disorder of the eye and the third leading cause of blindness worldwide. With a multifactorial etiology, AMD results in progressive loss of central vision affecting the macular region of the eye in elderly. While the prevalence is relatively higher in the Caucasian populations, it has gradually become a major public health issue among the non-Caucasian populations (including Indians) as well due to senescence, rapidly changing demographics and life-style factors. Recent genome-wide association studies (GWAS) on large case-control cohorts have helped in mapping genes in the complement cascade that are involved in the regulation of innate immunity with AMD susceptibility. Genes involved with mitochondrial oxidative stress and extracellular matrix regulation also play a role in AMD pathogenesis. Majority of the associations observed in complement (CFH, CFB, C2 and C3) and other (ARMS2 and HTRA1) genes have been replicated in diverse populations worldwide. Gene-gene (CFH with ARMS2 and HTRA1) interactions and correlations with environmental traits (smoking and body mass index) have been established as significant covariates in AMD pathology. In this review, we have provided an overview on the underlying molecular genetic mechanisms in AMD worldwide and highlight the AMD-associated-candidate genes and their potential role in disease pathogenesis.
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Nitsch D, Evans J, Roderick PJ, Smeeth L, Fletcher AE. Associations Between Chronic Kidney Disease and Age-Related Macular Degeneration. Ophthalmic Epidemiol 2009; 16:181-6. [DOI: 10.1080/09286580902863064] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Examining the relative influence of familial, genetic, and environmental covariate information in flexible risk models. Proc Natl Acad Sci U S A 2009; 106:8128-33. [PMID: 19420224 DOI: 10.1073/pnas.0902906106] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
We present a method for examining the relative influence of familial, genetic, and environmental covariate information in flexible nonparametric risk models. Our goal is investigating the relative importance of these three sources of information as they are associated with a particular outcome. To that end, we developed a method for incorporating arbitrary pedigree information in a smoothing spline ANOVA (SS-ANOVA) model. By expressing pedigree data as a positive semidefinite kernel matrix, the SS-ANOVA model is able to estimate a log-odds ratio as a multicomponent function of several variables: one or more functional components representing information from environmental covariates and/or genetic marker data and another representing pedigree relationships. We report a case study on models for retinal pigmentary abnormalities in the Beaver Dam Eye Study. Our model verifies known facts about the epidemiology of this eye lesion--found in eyes with early age-related macular degeneration--and shows significantly increased predictive ability in models that include all three of the genetic, environmental, and familial data sources. The case study also shows that models that contain only two of these data sources, that is, pedigree-environmental covariates, or pedigree-genetic markers, or environmental covariates-genetic markers, have comparable predictive ability, but less than the model with all three. This result is consistent with the notions that genetic marker data encode--at least in part--pedigree data, and that familial correlations encode shared environment data as well.
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The spectrum of phenotypes caused by variants in the CFH gene. Mol Immunol 2009; 46:1573-94. [PMID: 19297022 DOI: 10.1016/j.molimm.2009.02.013] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2008] [Revised: 02/09/2009] [Accepted: 02/11/2009] [Indexed: 12/24/2022]
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Klein R, Knudtson MD, Lee KE, Klein BEK. Serum cystatin C level, kidney disease markers, and incidence of age-related macular degeneration: the Beaver Dam Eye Study. ACTA ACUST UNITED AC 2009; 127:193-9. [PMID: 19204238 DOI: 10.1001/archophthalmol.2008.551] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
OBJECTIVE To examine the associations of the serum cystatin C level and chronic kidney disease with the incidence of age-related macular degeneration (AMD) over 15 years. METHODS In this population-based cohort study of 4926 individuals aged 43 to 86 years at baseline, 3779 participated in 1 or more follow-up examinations. Age-related macular degeneration was determined by grading photographs of the macula. Individuals were defined as having mild or moderate to severe chronic kidney disease based on a value of more than 45 mL/min/1.73 m(2) to 60 mL/min/1.73 m(2) or less and 45 mL/min/1.73 m(2) or less, respectively, according to the Modification of Diet in Renal Disease Study equation. RESULTS While controlling for age and other risk factors, the level of serum cystatin C at baseline was associated with the incidence of early AMD (odds ratio per log standard deviation [95% confidence interval], 1.16 [1.01-1.35]) and exudative AMD (1.42 [1.03-1.96]) but not geographic atrophy (0.89 [0.56-1.41]) or progression of AMD (1.02 [0.88-1.18]). Mild chronic kidney disease was associated with the 15-year cumulative incidence of early AMD (odds ratio per log standard deviation, 1.36 [95% confidence interval, 1.00-1.86]) but not the incidence of other AMD end points. CONCLUSION There is a relationship between the level of serum cystatin C and chronic kidney disease with the incidence of AMD. The underlying biological processes remain to be determined.
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Affiliation(s)
- Ronald Klein
- Department of Ophthalmology and Visual Sciences, University of Wisconsin School of Medicine and Public Health, 610 N Walnut St, Room 417 WARF, Madison, WI 53726-2336, USA.
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Nitsch D, Douglas I, Smeeth L, Fletcher A. Age-related Macular Degeneration and Complement Activation–related Diseases. Ophthalmology 2008; 115:1904-10. [DOI: 10.1016/j.ophtha.2008.06.035] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2007] [Revised: 05/22/2008] [Accepted: 06/27/2008] [Indexed: 10/21/2022] Open
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C2 and CFB genes in age-related maculopathy and joint action with CFH and LOC387715 genes. PLoS One 2008; 3:e2199. [PMID: 18493315 PMCID: PMC2374901 DOI: 10.1371/journal.pone.0002199] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2007] [Accepted: 04/11/2008] [Indexed: 11/19/2022] Open
Abstract
Background Age-related maculopathy (ARM) is a common cause of visual impairment in the elderly populations of industrialized countries and significantly affects the quality of life of those suffering from the disease. Variants within two genes, the complement factor H (CFH) and the poorly characterized LOC387715 (ARMS2), are widely recognized as ARM risk factors. CFH is important in regulation of the alternative complement pathway suggesting this pathway is involved in ARM pathogenesis. Two other complement pathway genes, the closely linked complement component receptor (C2) and complement factor B (CFB), were recently shown to harbor variants associated with ARM. Methods/Principal Findings We investigated two SNPs in C2 and two in CFB in independent case-control and family cohorts of white subjects and found rs547154, an intronic SNP in C2, to be significantly associated with ARM in both our case-control (P-value 0.00007) and family data (P-value 0.00001). Logistic regression analysis suggested that accounting for the effect at this locus significantly (P-value 0.002) improves the fit of a genetic risk model of CFH and LOC387715 effects only. Modeling with the generalized multifactor dimensionality reduction method showed that adding C2 to the two-factor model of CFH and LOC387715 increases the sensitivity (from 63% to 73%). However, the balanced accuracy increases only from 71% to 72%, and the specificity decreases from 80% to 72%. Conclusions/Significance C2/CFB significantly influences AMD susceptibility and although accounting for effects at this locus does not dramatically increase the overall accuracy of the genetic risk model, the improvement over the CFH-LOC387715 model is statistically significant.
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Xing C, Sivakumaran TA, Wang JJ, Rochtchina E, Joshi T, Smith W, Mitchell P, Iyengar SK. Complement factor H polymorphisms, renal phenotypes and age-related macular degeneration: the Blue Mountains Eye Study. Genes Immun 2008; 9:231-9. [PMID: 18340363 DOI: 10.1038/gene.2008.10] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Complement factor H (CFH) is a key regulator of the alternative pathway of complement and its mutations have been associated with membranoproliferative glomerulonephritis type II, atypical hemolytic uremic syndrome and age-related macular degeneration (AMD), suggesting that alternative pathway dysregulation is a common pathogenetic feature of these ocular and renal conditions. In this study we tested the hypothesis that common CFH variants have a global role in renal function in the Australian population-based Blue Mountains Eye Study (BMES). We replicated the association of I62V with estimated glomerular filtration rate (GFR; P=0.017) and creatinine clearance (CRCL; P=0.015). The minor allele of I62V (G) was deleterious: adding one copy of the G allele decreased GFR/CRCL by approximately 0.98 ml min(-1) per 1.73 m(2) (95% confidence interval (CI): 0.97, 0.99). We also replicated the association of Y402H with AMD and provided an unbiased estimate of population attributable risk (PAR). The minor allele of Y402H (C) was deleterious: the odds ratio estimate of CC genotype compared to TT was 1.87 (95% CI: 1.44, 2.45). The PAR of the C allele was estimated as 0.22 (95% CI: 0.15, 0.28). In summary, in the BMES population we confirmed the association between I62V and renal function, as measured by the estimated GFR, plus the association of Y402H with both early- and late-stage AMD.
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Affiliation(s)
- C Xing
- Department of Epidemiology and Biostatistics, Case Western Reserve University, Cleveland, OH 44106, USA
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Boon CJ, Klevering BJ, Hoyng CB, Zonneveld-Vrieling MN, Nabuurs SB, Blokland E, Cremers FP, den Hollander AI. Basal laminar drusen caused by compound heterozygous variants in the CFH gene. Am J Hum Genet 2008; 82:516-23. [PMID: 18252232 PMCID: PMC2427272 DOI: 10.1016/j.ajhg.2007.11.007] [Citation(s) in RCA: 78] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2007] [Revised: 10/23/2007] [Accepted: 11/07/2007] [Indexed: 10/22/2022] Open
Abstract
Age-related macular degeneration (AMD) is a multifactorial disease that is strongly associated with the Tyr402His variant in the complement factor H (CFH) gene. Drusen are hallmark lesions of AMD and consist of focal-inflammatory and/or immune-mediated depositions of extracellular material at the interface of the retinal pigment epithelium (RPE) and the Bruch membrane. We evaluated the role of CFH in 30 probands with early-onset drusen and identified heterozygous nonsense, missense, and splice variants in five families. The affected individuals all carried the Tyr402His AMD risk variant on the other allele. This supports an autosomal-recessive disease model in which individuals who carry a CFH mutation on one allele and the Tyr402His variant on the other allele develop drusen. Our findings strongly suggest that monogenic inheritance of CFH variants can result in basal laminar drusen in young adults, and this can progress to maculopathy and severe vision loss later in life.
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Affiliation(s)
- Camiel J.F. Boon
- Department of Ophthalmology, Radboud University Nijmegen Medical Centre, 6525 GA Nijmegen, The Netherlands
| | - B. Jeroen Klevering
- Department of Ophthalmology, Radboud University Nijmegen Medical Centre, 6525 GA Nijmegen, The Netherlands
| | - Carel B. Hoyng
- Department of Ophthalmology, Radboud University Nijmegen Medical Centre, 6525 GA Nijmegen, The Netherlands
| | - Marijke N. Zonneveld-Vrieling
- Department of Human Genetics, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, 6525 GA Nijmegen, The Netherlands
| | - Sander B. Nabuurs
- Centre for Molecular and Biomolecular Informatics, Radboud University Nijmegen, 6525 GA Nijmegen, The Netherlands
| | - Ellen Blokland
- Department of Human Genetics, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, 6525 GA Nijmegen, The Netherlands
| | - Frans P.M. Cremers
- Department of Human Genetics, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, 6525 GA Nijmegen, The Netherlands
| | - Anneke I. den Hollander
- Department of Human Genetics, Nijmegen Centre for Molecular Life Sciences, Radboud University Nijmegen Medical Centre, 6525 GA Nijmegen, The Netherlands
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