151
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Shiga Y, Akiyama M, Nishiguchi KM, Sato K, Shimozawa N, Takahashi A, Momozawa Y, Hirata M, Matsuda K, Yamaji T, Iwasaki M, Tsugane S, Oze I, Mikami H, Naito M, Wakai K, Yoshikawa M, Miyake M, Yamashiro K, Kashiwagi K, Iwata T, Mabuchi F, Takamoto M, Ozaki M, Kawase K, Aihara M, Araie M, Yamamoto T, Kiuchi Y, Nakamura M, Ikeda Y, Sonoda KH, Ishibashi T, Nitta K, Iwase A, Shirato S, Oka Y, Satoh M, Sasaki M, Fuse N, Suzuki Y, Cheng CY, Khor CC, Baskaran M, Perera S, Aung T, Vithana EN, Cooke Bailey JN, Kang JH, Pasquale LR, Haines JL, Wiggs JL, Burdon KP, Gharahkhani P, Hewitt AW, Mackey DA, MacGregor S, Craig JE, Allingham RR, Hauser M, Ashaye A, Budenz DL, Akafo S, Williams SEI, Kamatani Y, Nakazawa T, Kubo M. Genome-wide association study identifies seven novel susceptibility loci for primary open-angle glaucoma. Hum Mol Genet 2018; 27:1486-1496. [PMID: 29452408 PMCID: PMC6251544 DOI: 10.1093/hmg/ddy053] [Citation(s) in RCA: 91] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2017] [Revised: 01/16/2018] [Accepted: 01/17/2018] [Indexed: 11/12/2022] Open
Abstract
Primary open-angle glaucoma (POAG) is the leading cause of irreversible blindness worldwide for which 15 disease-associated loci had been discovered. Among them, only 5 loci have been associated with POAG in Asians. We carried out a genome-wide association study and a replication study that included a total of 7378 POAG cases and 36 385 controls from a Japanese population. After combining the genome-wide association study and the two replication sets, we identified 11 POAG-associated loci, including 4 known (CDKN2B-AS1, ABCA1, SIX6 and AFAP1) and 7 novel loci (FNDC3B, ANKRD55-MAP3K1, LMX1B, LHPP, HMGA2, MEIS2 and LOXL1) at a genome-wide significance level (P < 5.0×10-8), bringing the total number of POAG-susceptibility loci to 22. The 7 novel variants were subsequently evaluated in a multiethnic population comprising non-Japanese East Asians (1008 cases, 591 controls), Europeans (5008 cases, 35 472 controls) and Africans (2341 cases, 2037 controls). The candidate genes located within the new loci were related to ocular development (LMX1B, HMGA2 and MAP3K1) and glaucoma-related phenotypes (FNDC3B, LMX1B and LOXL1). Pathway analysis suggested epidermal growth factor receptor signaling might be involved in POAG pathogenesis. Genetic correlation analysis revealed the relationships between POAG and systemic diseases, including type 2 diabetes and cardiovascular diseases. These results improve our understanding of the genetic factors that affect the risk of developing POAG and provide new insight into the genetic architecture of POAG in Asians.
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Affiliation(s)
- Yukihiro Shiga
- Laboratory for Statistical Analysis, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
- Department of Ophthalmology, Tohoku University Graduate School of Medicine, Miyagi, Japan
| | - Masato Akiyama
- Laboratory for Statistical Analysis, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - Koji M Nishiguchi
- Department of Ophthalmology, Tohoku University Graduate School of Medicine, Miyagi, Japan
- Department of Advanced Ophthalmic Medicine, Tohoku University Graduate School of Medicine, Miyagi, Japan
| | - Kota Sato
- Department of Ophthalmology, Tohoku University Graduate School of Medicine, Miyagi, Japan
- Department of Ophthalmic Imaging and Information Analytics, Tohoku University Graduate School of Medicine, Miyagi, Japan
| | - Nobuhiro Shimozawa
- Tsukuba Primate Research Center, National Institutes of Biomedical Innovation, Health and Nutrition, Ibaraki, Japan
| | - Atsushi Takahashi
- Laboratory for Statistical Analysis, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
- Omics Research Center, National Cerebral and Cardiovascular Center, Osaka, Japan
| | - Yukihide Momozawa
- Laboratory for Genotyping Development, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
| | - Makoto Hirata
- Institute of Medical Science, The University of Tokyo, Tokyo, Japan
| | - Koichi Matsuda
- Graduate School of Frontier Sciences, The University of Tokyo, Tokyo, Japan
| | - Taiki Yamaji
- Division of Epidemiology, Center for Public Health Sciences, National Cancer Center, Tokyo, Japan
| | - Motoki Iwasaki
- Division of Epidemiology, Center for Public Health Sciences, National Cancer Center, Tokyo, Japan
| | - Shoichiro Tsugane
- Center for Public Health Sciences, National Cancer Center, Tokyo, Japan
| | - Isao Oze
- Division of Molecular and Clinical Epidemiology, Aichi Cancer Center Research Institute, Nagoya, Japan
| | - Haruo Mikami
- Cancer Prevention Center, Chiba Cancer Center Research Institute, Chiba, Japan
| | - Mariko Naito
- Department of Preventive Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Kenji Wakai
- Department of Preventive Medicine, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Munemitsu Yoshikawa
- Department of Ophthalmology and Visual Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Masahiro Miyake
- Department of Ophthalmology and Visual Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Kenji Yamashiro
- Department of Ophthalmology and Visual Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan
- Department of Ophthalmology, Otsu Red-Cross Hospital, Otsu, Japan
| | | | - Kenji Kashiwagi
- Department of Ophthalmology, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan
| | - Takeshi Iwata
- Division of Molecular and Cellular Biology, National Institute of Sensory Organs, Tokyo Medical Center, National Hospital Organization, Tokyo, Japan
| | - Fumihiko Mabuchi
- Department of Ophthalmology, Faculty of Medicine, University of Yamanashi, Yamanashi, Japan
| | | | - Mineo Ozaki
- Ozaki Eye Hospital, Hyuga, Miyazaki, Japan
- Department of Ophthalmology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Kazuhide Kawase
- Department of Ophthalmology, Gifu University Graduate School of Medicine, Gifu, Japan
| | - Makoto Aihara
- Department of Ophthalmology, University of Tokyo, Tokyo, Japan
| | - Makoto Araie
- Kanto Central Hospital of the Mutual Aid Association of Public School Teachers, Tokyo, Japan
| | - Tetsuya Yamamoto
- Department of Ophthalmology, Gifu University Graduate School of Medicine, Gifu, Japan
| | - Yoshiaki Kiuchi
- Department of Ophthalmology and Visual Sciences, Hiroshima University, Hiroshima, Japan
| | - Makoto Nakamura
- Division of Ophthalmology, Department of Surgery, Kobe University Graduate School of Medicine, Kobe, Japan
| | - Yasuhiro Ikeda
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Koh-Hei Sonoda
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Tatsuro Ishibashi
- Department of Ophthalmology, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Koji Nitta
- Fukuiken Saiseikai Hospital, Fukui, Japan
| | | | | | | | - Mamoru Satoh
- Iwate Tohoku Medical Megabank Organization, Iwate Medical University, Iwate, Japan
| | - Makoto Sasaki
- Iwate Tohoku Medical Megabank Organization, Iwate Medical University, Iwate, Japan
| | - Nobuo Fuse
- Department of Integrative Genomics, Tohoku Medical Megabank Organization, Miyagi, Japan
| | - Yoichi Suzuki
- Department of Education and Training, Tohoku Medical Megabank Organization, Miyagi, Japan
| | - Ching-Yu Cheng
- Singapore Eye Research Institute, Singapore National Eye Centre, Singapore
- Ophthalmology and Visual Sciences Academic Clinical Program (Eye ACP), Duke-NUS Medical School, Singapore
- Department of Ophthalmology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | | | - Mani Baskaran
- Singapore Eye Research Institute, Singapore National Eye Centre, Singapore
- Ophthalmology and Visual Sciences Academic Clinical Program (Eye ACP), Duke-NUS Medical School, Singapore
| | - Shamira Perera
- Singapore Eye Research Institute, Singapore National Eye Centre, Singapore
| | - Tin Aung
- Singapore Eye Research Institute, Singapore National Eye Centre, Singapore
- Ophthalmology and Visual Sciences Academic Clinical Program (Eye ACP), Duke-NUS Medical School, Singapore
- Department of Ophthalmology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Eranga N Vithana
- Singapore Eye Research Institute, Singapore National Eye Centre, Singapore
| | - Jessica N Cooke Bailey
- Department of Population and Quantitative Health Sciences, Institute for Computational Biology, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | - Jae H Kang
- Channing Division of Network Medicine, Brigham and Women’s Hospital, Boston, MA, USA
| | - Louis R Pasquale
- Department of Ophthalmology, Harvard Medical School, Boston, MA, USA
| | - Jonathan L Haines
- Department of Population and Quantitative Health Sciences, Institute for Computational Biology, Case Western Reserve University School of Medicine, Cleveland, OH, USA
| | | | - Janey L Wiggs
- Department of Ophthalmology, Harvard Medical School, Boston, MA, USA
| | - Kathryn P Burdon
- Menzies Institute for Medical Research, University of Tasmania, Hobart, TAS, Australia
- Department of Ophthalmology, Flinders University, Adelaide, SA, Australia
| | - Puya Gharahkhani
- QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia
| | - Alex W Hewitt
- Centre for Eye Research Australia, University of Melbourne, Melbourne, VIC, Australia
- Department of Ophthalmology, Royal Victorian Eye and Ear Hospital, Melbourne, VIC, Australia
| | - David A Mackey
- Menzies Institute for Medical Research, University of Tasmania, Hobart, TAS, Australia
- Centre for Ophthalmology and Visual Science, Lions Eye Institute, University of Western Australia, Perth, WA, Australia
| | - Stuart MacGregor
- QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia
| | - Jamie E Craig
- Department of Ophthalmology, Flinders University, Adelaide, SA, Australia
| | | | | | - Adeyinka Ashaye
- Department of Ophthalmology, College of Medicine, University of Ibadan, Ibadan, Nigeria
| | - Donald L Budenz
- Department of Ophthalmology, University of North Carolina at Chapel Hill, USA
| | - Stephan Akafo
- University of Ghana School of Medicine and Dentistry, Ghana
| | - Susan E I Williams
- Division of Ophthalmology, Department of Neurosciences, University of the Witwatersrand, South Africa
| | - Yoichiro Kamatani
- Laboratory for Statistical Analysis, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
- Center for Genomic Medicine, Graduate School of Medicine, Kyoto University, Kyoto, Japan
| | - Toru Nakazawa
- Department of Ophthalmology, Tohoku University Graduate School of Medicine, Miyagi, Japan
- Department of Advanced Ophthalmic Medicine, Tohoku University Graduate School of Medicine, Miyagi, Japan
- Department of Ophthalmic Imaging and Information Analytics, Tohoku University Graduate School of Medicine, Miyagi, Japan
| | - Michiaki Kubo
- Laboratory for Genotyping Development, RIKEN Center for Integrative Medical Sciences, Yokohama, Japan
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152
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Lin CJ, Lin CY, Stitziel NO. Genetics of the extracellular matrix in aortic aneurysmal diseases. Matrix Biol 2018; 71-72:128-143. [PMID: 29656146 DOI: 10.1016/j.matbio.2018.04.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2017] [Revised: 04/09/2018] [Accepted: 04/11/2018] [Indexed: 12/17/2022]
Abstract
Aortic aneurysms are morbid conditions that can lead to rupture or dissection and are categorized as thoracic (TAA) or abdominal aortic aneurysms (AAA) depending on their location. While AAA shares overlapping risk factors with atherosclerotic cardiovascular disease, TAA exhibits strong heritability. Human genetic studies in the past two decades have successfully identified numerous genes involved in both familial and sporadic forms of aortic aneurysm. In this review we will discuss the genetic basis of aortic aneurysm, focusing on the extracellular matrix and how insights from these studies have informed our understanding of human biology and disease pathogenesis.
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Affiliation(s)
- Chien-Jung Lin
- Cardiovascular Division, Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA.
| | - Chieh-Yu Lin
- Department of Pathology, Stanford University School of Medicine, Stanford, CA, USA
| | - Nathan O Stitziel
- Cardiovascular Division, Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA; Department of Genetics, Washington University School of Medicine, St. Louis, MO, USA; McDonell Genome Institute, Washington University School of Medicine, St. Louis, MO, USA.
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153
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Janssen R, Piscaer I, Wouters EFM. Inhalation therapy for repairing damaged elastin fibers and decelerating elastinolysis in chronic obstructive pulmonary disease. Expert Rev Respir Med 2018; 12:349-360. [DOI: 10.1080/17476348.2018.1460206] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Rob Janssen
- Department of Pulmonary Medicine, Canisius-Wilhelmina Hospital, Nijmegen, Netherlands
| | - Ianthe Piscaer
- Department of Respiratory Medicine, Maastricht University Medical Centre, Maastricht, Netherlands
| | - Emiel FM. Wouters
- Department of Research and Education, Center of Expertise for Chronic Organ Failure(CIRO), Horn, Netherlands
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154
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Bellaye PS, Shimbori C, Upagupta C, Sato S, Shi W, Gauldie J, Ask K, Kolb M. Lysyl Oxidase–Like 1 Protein Deficiency Protects Mice from Adenoviral Transforming Growth Factor-β1–induced Pulmonary Fibrosis. Am J Respir Cell Mol Biol 2018; 58:461-470. [DOI: 10.1165/rcmb.2017-0252oc] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Affiliation(s)
- Pierre-Simon Bellaye
- Firestone Institute for Respiratory Health, the Research Institute at St. Joseph’s Healthcare, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Chiko Shimbori
- Firestone Institute for Respiratory Health, the Research Institute at St. Joseph’s Healthcare, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Chandak Upagupta
- Firestone Institute for Respiratory Health, the Research Institute at St. Joseph’s Healthcare, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Seidai Sato
- Firestone Institute for Respiratory Health, the Research Institute at St. Joseph’s Healthcare, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
- Department of Respiratory Medicine and Rheumatology, Graduate School of Biomedical Sciences, Tokushima University, Tokoshima, Japan
| | - Wei Shi
- Developmental Biology and Regenerative Medicine Program, the Saban Research Institute of Children’s Hospital Los Angeles, Los Angeles, California; and
- Department of Surgery, Keck School of Medicine, University of Southern California, Los Angeles, California
| | - Jack Gauldie
- Firestone Institute for Respiratory Health, the Research Institute at St. Joseph’s Healthcare, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Kjetil Ask
- Firestone Institute for Respiratory Health, the Research Institute at St. Joseph’s Healthcare, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
| | - Martin Kolb
- Firestone Institute for Respiratory Health, the Research Institute at St. Joseph’s Healthcare, Department of Medicine, McMaster University, Hamilton, Ontario, Canada
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155
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Zhao W, Yang A, Chen W, Wang P, Liu T, Cong M, Xu A, Yan X, Jia J, You H. Inhibition of lysyl oxidase-like 1 (LOXL1) expression arrests liver fibrosis progression in cirrhosis by reducing elastin crosslinking. Biochim Biophys Acta Mol Basis Dis 2018; 1864:1129-1137. [DOI: 10.1016/j.bbadis.2018.01.019] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Revised: 01/11/2018] [Accepted: 01/19/2018] [Indexed: 01/06/2023]
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156
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Parasaram V, Nosoudi N, Chowdhury A, Vyavahare N. Pentagalloyl glucose increases elastin deposition, decreases reactive oxygen species and matrix metalloproteinase activity in pulmonary fibroblasts under inflammatory conditions. Biochem Biophys Res Commun 2018; 499:24-29. [PMID: 29550472 DOI: 10.1016/j.bbrc.2018.03.100] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2018] [Accepted: 03/13/2018] [Indexed: 12/11/2022]
Abstract
Emphysema is characterized by degradation of lung alveoli that leads to poor airflow in lungs. Irreversible elastic fiber degradation by matrix metalloproteinases (MMPs) and reactive oxygen species (ROS) activity leads to loss of elasticity and drives the progression of this disease. We investigated if a polyphenol, pentagalloyl glucose (PGG) can increase elastin production in pulmonary fibroblasts. We also studied the effect of PGG treatment in reducing MMP activity and ROS levels in cells. We exposed rat pulmonary fibroblasts to two different types of inflammatory environments i.e., tumor necrosis factor-α (TNF-α) and cigarette smoke extract (CSE) to mimic the disease. Parameters like lysyl oxidase (LOX) and elastin gene expression, MMP-9 activity in the medium, lysyl oxidase (LOX) activity and ROS levels were studied to assess the effect of PGG on pulmonary fibroblasts. CSE inhibited lysyl oxidase (LOX) enzyme activity that resulted in a decreased elastin formation. Similarly, TNF-α treated cells showed less elastin in the cell layers. Both these agents caused increase in MMP activity and ROS levels in cells. However, when supplemented with PGG treatment along with these two inflammatory agents, we saw a significant increase in elastin deposition, reduction in both MMP activity and ROS levels. Thus PGG, which has anti-inflammatory, anti-oxidant properties coupled with its ability to aid in elastic fiber formation, can be a multifunctional drug to potentially arrest the progression of emphysema.
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Affiliation(s)
| | - Nasim Nosoudi
- Department of Biomedical, Industrial and Human Factors Engineering, Wright State University, OH, United States
| | - Aniqa Chowdhury
- Department of Bioengineering, Clemson University, SC, United States
| | - Naren Vyavahare
- Department of Bioengineering, Clemson University, SC, United States.
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157
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Extracellular matrix regulation of fibroblast function: redefining our perspective on skin aging. J Cell Commun Signal 2018; 12:35-43. [PMID: 29455303 DOI: 10.1007/s12079-018-0459-1] [Citation(s) in RCA: 165] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2018] [Accepted: 01/31/2018] [Indexed: 01/22/2023] Open
Abstract
The dermal extracellular matrix (ECM) comprises the bulk of skin and confers strength and resiliency. In young skin, fibroblasts produce and adhere to the dermal ECM, which is composed primarily of type I collagen fibrils. Adherence allows fibroblasts to spread and exert mechanical force on the surrounding ECM. In this state, fibroblasts display a "youthful" phenotype characterized by maintenance of the composition and structural organization of the dermal ECM. During aging, fibroblast-ECM interactions become disrupted due to fragmentation of collagen fibrils. This disruption causes loss of fibroblast spreading and mechanical force, which inextricably lead to an "aged" phenotype; fibroblasts synthesize less ECM proteins and more matrix-degrading metalloproteinases. This imbalance of ECM homeostasis further drives collagen fibril fragmentation in a self-perpetuating cycle. This article summarizes age-related changes in the dermal ECM and the mechanisms by which these changes alter the interplay between fibroblasts and their extracellular matrix microenvironment that drive the aging process in human skin.
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158
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Mecham RP. Elastin in lung development and disease pathogenesis. Matrix Biol 2018; 73:6-20. [PMID: 29331337 DOI: 10.1016/j.matbio.2018.01.005] [Citation(s) in RCA: 98] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Revised: 12/30/2017] [Accepted: 01/07/2018] [Indexed: 12/24/2022]
Abstract
Elastin is expressed in most tissues that require elastic recoil. The protein first appeared coincident with the closed circulatory system, and was critical for the evolutionary success of the vertebrate lineage. Elastin is expressed by multiple cell types in the lung, including mesothelial cells in the pleura, smooth muscle cells in airways and blood vessels, endothelial cells, and interstitial fibroblasts. This highly crosslinked protein associates with fibrillin-containing microfibrils to form the elastic fiber, which is the physiological structure that functions in the extracellular matrix. Elastic fibers can be woven into many different shapes depending on the mechanical needs of the tissue. In large pulmonary vessels, for example, elastin forms continuous sheets, or lamellae, that separate smooth muscle layers. Outside of the vasculature, elastic fibers form an extensive fiber network that originates in the central bronchi and inserts into the distal airspaces and visceral pleura. The fibrous cables form a looping system that encircle the alveolar ducts and terminal air spaces and ensures that applied force is transmitted equally to all parts of the lung. Normal lung function depends on proper secretion and assembly of elastin, and either inhibition of elastin fiber assembly or degradation of existing elastin results in lung dysfunction and disease.
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Affiliation(s)
- Robert P Mecham
- Department of Cell Biology & Physiology, Washington University School of Medicine, St. Louis, MO, USA.
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159
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Schweitzer C. [Pseudoexfoliation syndrome and pseudoexfoliation glaucoma]. J Fr Ophtalmol 2018; 41:78-90. [PMID: 29329947 DOI: 10.1016/j.jfo.2017.09.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Accepted: 09/16/2017] [Indexed: 01/26/2023]
Abstract
Pseudoexfoliation syndrome is an age-related systemic disease that mainly affects the anterior structures of the eye. Despite a worldwide distribution, reported incidence and prevalence of this syndrome vary widely between ethnicities and geographical areas. The exfoliative material is composed mainly of abnormal cross-linked fibrils that accumulate progressively in some organs such as the heart, blood vessels, lungs or meninges, and particularly in the anterior structures of the eye. The exact pathophysiological process still remains unclear but the association of genetic and environmental factors are thought to play a role in the development and progressive extracellular accumulation of exfoliative material. Hence, LOXL1 gene polymorphisms, responsible for metabolism of some components of elastic fibers and extracellular matrix, and increased natural exposure to ambient ultraviolet or caffeine consumption have been associated with pseudoexfoliation syndrome. Ophthalmological manifestations are commonly bilateral with an asymmetric presentation and can lead to severe visual impairment and blindness more frequently than in the general population, mainly related to glaucoma and cataract. Pseudoexfoliation glaucoma is a major complication of pseudoexfoliation syndrome and represents the main cause of identifiable glaucoma worldwide. Visual field progression is more rapid than that observed in primary open angle glaucoma, and filtering surgery is more frequently required. Nuclear cataract is more frequent and occurs earlier than in the general population. Owing to poorer pupil dilation and increased zonular instability, cataract surgery with pseudoexfoliation is associated with a 5- to 10-fold increase in surgical complications compared to cataract surgery without pseudoexfoliation. Some specific treatments targeting production, formation or accumulation of exfoliative material could improve the prognosis of this syndrome.
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Affiliation(s)
- C Schweitzer
- Service d'ophtalmologie, CHU de Bordeaux, 33000 Bordeaux, France; UMR 1219, Inserm, Bordeaux Population Health Research Center, team LEHA, université Bordeaux, 33000 Bordeaux, France.
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160
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Santamaría PG, Floristán A, Fontanals-Cirera B, Vázquez-Naharro A, Santos V, Morales S, Yuste L, Peinado H, García-Gómez A, Portillo F, Hernando E, Cano A. Lysyl oxidase-like 3 is required for melanoma cell survival by maintaining genomic stability. Cell Death Differ 2017; 25:935-950. [PMID: 29229995 PMCID: PMC5907912 DOI: 10.1038/s41418-017-0030-2] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Revised: 10/09/2017] [Accepted: 10/31/2017] [Indexed: 01/07/2023] Open
Abstract
Lysyl oxidase-like 3 (LOXL3) is a member of the lysyl oxidase family comprising multifunctional enzymes with depicted roles in extracellular matrix maturation, tumorigenesis, and metastasis. In silico expression analyses followed by experimental validation in a comprehensive cohort of human cell lines revealed a significant upregulation of LOXL3 in human melanoma. We show that LOXL3 silencing impairs cell proliferation and triggers apoptosis in various melanoma cell lines. Further supporting a pro-oncogenic role in melanoma, LOXL3 favors tumor growth in vivo and cooperates with oncogenic BRAF in melanocyte transformation. Upon LOXL3 depletion, melanoma cells display a faulty DNA damage response (DDR), characterized by ATM checkpoint activation and inefficient ATR activation leading to the accumulation of double-strand breaks (DSBs) and aberrant mitosis. Consistent with these findings, LOXL3 binds to proteins involved in the maintenance of genome integrity, in particular BRCA2 and MSH2, whose levels dramatically decrease upon LOXL3 depletion. Moreover, LOXL3 is required for efficient DSB repair in melanoma cells. Our results reveal an unexpected role for LOXL3 in the control of genome stability and melanoma progression, exposing its potential as a novel therapeutic target in malignant melanoma, a very aggressive condition yet in need for more effective treatment options.
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Affiliation(s)
- Patricia G Santamaría
- Departamento de Bioquímica, UAM, Instituto de Investigaciones Biomédicas "Alberto Sols" CSIC-UAM, Arzobispo Morcillo 4, 28029, Madrid, Spain. .,Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid, Spain.
| | - Alfredo Floristán
- Departamento de Bioquímica, UAM, Instituto de Investigaciones Biomédicas "Alberto Sols" CSIC-UAM, Arzobispo Morcillo 4, 28029, Madrid, Spain
| | - Bárbara Fontanals-Cirera
- Department of Pathology and Interdisciplinary Melanoma Cooperative Group, New York University Langone Medical Center, New York, NY, USA
| | - Alberto Vázquez-Naharro
- Departamento de Bioquímica, UAM, Instituto de Investigaciones Biomédicas "Alberto Sols" CSIC-UAM, Arzobispo Morcillo 4, 28029, Madrid, Spain.,Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid, Spain
| | - Vanesa Santos
- Departamento de Bioquímica, UAM, Instituto de Investigaciones Biomédicas "Alberto Sols" CSIC-UAM, Arzobispo Morcillo 4, 28029, Madrid, Spain.,Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid, Spain
| | - Saleta Morales
- Departamento de Bioquímica, UAM, Instituto de Investigaciones Biomédicas "Alberto Sols" CSIC-UAM, Arzobispo Morcillo 4, 28029, Madrid, Spain
| | - Lourdes Yuste
- Departamento de Bioquímica, UAM, Instituto de Investigaciones Biomédicas "Alberto Sols" CSIC-UAM, Arzobispo Morcillo 4, 28029, Madrid, Spain
| | - Héctor Peinado
- Microenvironment and Metastasis Laboratory, Department of Molecular Oncology, Spanish National Cancer Research Center (CNIO), Madrid, Spain
| | - Antonio García-Gómez
- Chromatin and Disease Group, Cancer Epigenetics and Biology Programme (PEBC), Bellvitge Biomedical Research Institute (IDIBELL), Barcelona, Spain
| | - Francisco Portillo
- Departamento de Bioquímica, UAM, Instituto de Investigaciones Biomédicas "Alberto Sols" CSIC-UAM, Arzobispo Morcillo 4, 28029, Madrid, Spain.,Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid, Spain
| | - Eva Hernando
- Department of Pathology and Interdisciplinary Melanoma Cooperative Group, New York University Langone Medical Center, New York, NY, USA
| | - Amparo Cano
- Departamento de Bioquímica, UAM, Instituto de Investigaciones Biomédicas "Alberto Sols" CSIC-UAM, Arzobispo Morcillo 4, 28029, Madrid, Spain. .,Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Madrid, Spain.
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161
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Besiktepe N, Kayalar O, Ersen E, Oztay F. The copper dependent-lysyl oxidases contribute to the pathogenesis of pulmonary emphysema in chronic obstructive pulmonary disease patients. J Trace Elem Med Biol 2017; 44:247-255. [PMID: 28965583 DOI: 10.1016/j.jtemb.2017.08.011] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Revised: 08/15/2017] [Accepted: 08/17/2017] [Indexed: 02/05/2023]
Abstract
Abnormalities in the elastic fiber biology are seen in pulmonary emphysema (PE). The copper-dependent lysyl oxidases regulate the production and accumulation of elastic fibers in the connective tissue. This study focused on the relationship between lysyl oxidase (LOX), LOX-like protein 1 (LOXL1), and LOXL2 and PE pathogenesis. Lung samples with or without PE from patients with chronic obstructive lung disease (n=35) were used. Protein levels of elastin, LOX, LOXL1, LOXL2, hypoxia inducible factor 1-alpha (HIF-1α), copper metabolism domain containing-1 (COMMD1), and phosphatase and tensin homolog (PTEN) were assayed using microscopic and biochemical methods The emphysematous areas were characterized by enlargement of the alveoli, destruction of the alveolar structure, accumulation of macrophages in the alveolar lumens, and showed increased HIF-1α immunoreactivity. Additionally, the emphysematous areas had significantly lower elastin, LOX, LOXL1, LOXL2, HIF-1α, COMMD1, and PTEN protein levels than the non-emphysematous areas. We suppose that the reductions in the HIF-1α levels led to decreases in the protein levels of active LOX, LOXL1, and LOXL2. These decreases might cause abnormalities in the elastic fiber biology. HIF-1α activation induced by decreased COMMD1 and protease activation induced by decreased PTEN might contribute to the development of PE. Finally, methods aimed at increasing the protein levels of LOXs, COMMD1 and PTEN might be effective for treating PE.
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Affiliation(s)
- Neziha Besiktepe
- Department of Biology, Faculty of Science, Istanbul University, 34134 Vezneciler, Istanbul, Turkey.
| | - Ozgecan Kayalar
- Department of Biology, Faculty of Science, Istanbul University, 34134 Vezneciler, Istanbul, Turkey.
| | - Ezel Ersen
- Department of Thoracic Surgery, Cerrahpasa Medical Faculty, Istanbul University, 34098 Kocamustafapasa, Istanbul, Turkey.
| | - Fusun Oztay
- Department of Biology, Faculty of Science, Istanbul University, 34134 Vezneciler, Istanbul, Turkey.
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162
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Vaginal Expression of LOXL1 in Premenopausal and Postmenopausal Women With Pelvic Organ Prolapse. Female Pelvic Med Reconstr Surg 2017; 22:229-35. [PMID: 26829347 DOI: 10.1097/spv.0000000000000251] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
OBJECTIVES This study aimed to compare cellular expression of lysyl oxidase-like 1 (LOXL1), a key enzyme in elastin metabolism, of premenopausal women with pelvic organ prolapse (POP) compared with premenopausal controls without POP and postmenopausal women with POP. In addition, we examined whether variation of LOXL1 expression was dependent on biopsy site. METHODS A standardized protocol was utilized to obtain vaginal biopsies from 30 women (10 premenopausal POP, 10 postmenopausal POP, and 10 premenopausal non-POP). Expression levels of messenger RNA (mRNA) and protein of LOXL1 were determined using real-time quantitative polymerase chain reactions and enzyme-linked immunosorbant assays. Analysis was performed to determine if there were differences between group or biopsy site. RESULTS Significant differences in LOXL1 mRNA expression were found between patient groups (P = 0.0033). LOXL1 mRNA expression (relative to 18S) was upregulated in the postmenopausal POP group (54.5 ± 14.7) compared with the premenopausal POP group (5.2 ± 14.7, P = 0.0034) and the premenopausal non-POP group (23 ± 18, P = 0.0359). No significant differences in LOXL1 protein expression (nanogram/milliliter per microgram total protein) were seen between groups (premenopausal POP, 3.2 × 10 ± 6.3 × 10; postmenopausal POP, 4.3 × 10 ± 6.3 × 10; premenopausal non-POP, 5.0 × 10 ± 7.7 × 10; P = 0.15). No differences in mRNA expression were seen between sites (P = 0.74), but significant variation was noted in protein expression (P = 0.001). CONCLUSIONS Premenopausal and postmenopausal women with POP exhibit differential expression of LOXL1 suggesting different pathways in the pathogenesis of POP. The role of biopsy location on LOXL1 expression requires further investigation.
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163
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Li R, Herriges JC, Chen L, Mecham RP, Sun X. FGF receptors control alveolar elastogenesis. Development 2017; 144:4563-4572. [PMID: 29122839 DOI: 10.1242/dev.149443] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Accepted: 09/28/2017] [Indexed: 12/21/2022]
Abstract
Alveologenesis, the final step of lung development, is characterized by the formation of millions of alveolar septa that constitute the vast gas-exchange surface area. The genetic network driving alveologenesis is poorly understood compared with earlier steps in lung development. FGF signaling through receptors Fgfr3 and Fgfr4 is crucial for alveologenesis, but the mechanisms through which they mediate this process remain unclear. Here we show that in Fgfr3;Fgfr4 (Fgfr3;4) global mutant mice, alveolar simplification is first observed at the onset of alveologenesis at postnatal day 3. This is preceded by disorganization of elastin, indicating defects in the extracellular matrix (ECM). Although Fgfr3 and Fgfr4 are expressed in the mesenchyme and epithelium, inactivation in the mesenchyme, but not the epithelium, recapitulated the defects. Expression analysis of components of the elastogenesis machinery revealed that Mfap5 (also known as Magp2), which encodes an elastin-microfibril bridging factor, is upregulated in Fgfr3;4 mutants. Mfap5 mutation in the Fgfr3;4 mutant background partially attenuated the alveologenesis defects. These data demonstrate that, during normal lung maturation, FGF signaling restricts expression of the elastogenic machinery in the lung mesenchyme to control orderly formation of the elastin ECM, thereby driving alveolar septa formation to increase the gas-exchange surface.
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Affiliation(s)
- Rongbo Li
- Department of Pediatrics, University of California, San Diego, La Jolla, CA 92093, USA.,Laboratory of Genetics, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - John C Herriges
- Laboratory of Genetics, University of Wisconsin-Madison, Madison, WI 53706, USA
| | - Lin Chen
- Department of Rehabilitation Medicine, Center of Bone Metabolism and Repair (CBMR), Trauma Center, State Key Laboratory of Trauma, Burns and Combined Injury, Daping Hospital, Third Military Medical University, Chongqing 400042, China
| | - Robert P Mecham
- Department of Cell Biology & Physiology, Washington University School of Medicine, Saint Louis, MO 631103, USA
| | - Xin Sun
- Department of Pediatrics, University of California, San Diego, La Jolla, CA 92093, USA .,Laboratory of Genetics, University of Wisconsin-Madison, Madison, WI 53706, USA
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164
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Trackman PC. Functional importance of lysyl oxidase family propeptide regions. J Cell Commun Signal 2017; 12:45-53. [PMID: 29086201 DOI: 10.1007/s12079-017-0424-4] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Accepted: 10/17/2017] [Indexed: 12/14/2022] Open
Abstract
The lysyl oxidase family of proteins is primarily known for its critical role in catalyzing extracellular oxidative deamination of hydroxylysine and lysine residues in collagens, and lysine residues in elastin required for connective tissue structure and function. Lysyl oxidases have additional important biological functions in health and disease. While the enzyme domains are highly conserved, the propeptide regions are less uniform, and have biological activity, some of which are independent of their respective enzymes. This review summarizes what has been published regarding the functions of the propeptide regions of this family of proteins in the context of extracellular matrix biosynthesis, fibrosis and cancer biology. Although much has been learned, there is a need for greater attention to structure/function relationships and mechanisms to more fully understand these multifunctional proteins.
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Affiliation(s)
- Philip C Trackman
- Henry M. Goldman School of Dental Medicine, Department of Molecular and Cell Biology, Boston University, 700 Albany Street, W-201, Boston, MA, 02118, USA.
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165
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Huang H, Du W, Brekken RA. Extracellular Matrix Induction of Intracellular Reactive Oxygen Species. Antioxid Redox Signal 2017; 27:774-784. [PMID: 28791881 DOI: 10.1089/ars.2017.7305] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
SIGNIFICANCE The extracellular matrix (ECM) is the noncellular component secreted by cells and is present within all tissues and organs. The ECM provides the structural support required for tissue integrity and also contributes to diseases, including cancer. Many diseases rich in ECM are characterized by changes in reactive oxygen species (ROS) levels that have been shown to have important context-dependent functions. Recent Advances: Many studies have found that the ECM affects ROS production through integrins. The activation of integrins by ECM ligands results in stimulation of multiple pathways that can generate ROS. Furthermore, control of ECM-integrin interaction by matricellular proteins is an underappreciated pathway that functions as an ROS rheostat in remodeling tissues. CRITICAL ISSUES A better understanding of how the ECM affects the generation of intracellular ROS is required for advances in the development of therapeutic strategies that affect or exploit oxidative stress. FUTURE DIRECTIONS Targeting ROS generation can be therapeutic or can promote disease progression in a context-dependent manner. Many ECM proteins can impact ROS generation. However, given the breadth of different proteins that constitute the ECM and the cell surface receptors that interact with ECM proteins, there are likely many tissue and microenvironmental-specific ROS-generating pathways that have yet to be investigated in depth. Identifying canonical pathways of ECM-induced ROS generation should be a priority for the field. Antioxid. Redox Signal. 27, 774-784.
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Affiliation(s)
- Huocong Huang
- 1 Division of Surgical Oncology, Department of Surgery, Hamon Center for Therapeutic Oncology Research , Dallas, Texas
| | - Wenting Du
- 1 Division of Surgical Oncology, Department of Surgery, Hamon Center for Therapeutic Oncology Research , Dallas, Texas
| | - Rolf A Brekken
- 1 Division of Surgical Oncology, Department of Surgery, Hamon Center for Therapeutic Oncology Research , Dallas, Texas.,2 Department of Pharmacology, UT Southwestern, Dallas, Texas
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166
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Yamashiro Y, Yanagisawa H. Crossing Bridges between Extra- and Intra-Cellular Events in Thoracic Aortic Aneurysms. J Atheroscler Thromb 2017; 25:99-110. [PMID: 28943527 PMCID: PMC5827090 DOI: 10.5551/jat.rv17015] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Thoracic aortic aneurysms (TAAs) are common, life-threatening diseases and are a major cause of mortality and morbidity. Over the past decade, genetic approaches have revealed that 1) activation of the transforming growth factor beta (TGF-β) signaling, 2) alterations in the contractile apparatus of vascular smooth muscle cells (SMCs), and 3) defects in the extracellular matrix (ECM) were responsible for development of TAAs. Most recently, a fourth mechanism has been proposed in that dysfunction of mechanosensing in the aortic wall in response to hemodynamic stress may be a key driver of TAAs. Interestingly, the elastin-contractile unit, which is an anatomical and functional unit connecting extracellular elastic laminae to the intracellular SMC contractile filaments, via cell surface receptors, has been shown to play a critical role in the mechanosensing of SMCs, and many genes identified in TAAs encode for proteins along this continuum. However, it is still debated whether these four pathways converge into a common pathway. Currently, an effective therapeutic strategy based on the underlying mechanism of each type of TAAs has not been established. In this review, we will update the present knowledge on the molecular mechanism of TAAs with a focus on the signaling pathways potentially involved in the initiation of TAAs. Finally, we will evaluate current therapeutic strategies for TAAs and propose new directions for future treatment of TAAs.
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Affiliation(s)
- Yoshito Yamashiro
- Life Science Center of Tsukuba Advanced Research Alliance, University of Tsukuba
| | - Hiromi Yanagisawa
- Life Science Center of Tsukuba Advanced Research Alliance, University of Tsukuba
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167
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Association of Lysyl Oxidase-Like 1 Gene Polymorphism in Turkish Patients With Pseudoexfoliation Syndrome and Pseudoexfoliation Glaucoma. J Glaucoma 2017; 26:e54-e57. [PMID: 27753755 DOI: 10.1097/ijg.0000000000000557] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
PURPOSE To investigate the genetic association of lysyl oxidase-like 1 (LOXL1) gene polymorphisms in patients with pseudoexfoliation (PEX) syndrome and PEX glaucoma of Turkish descent. METHODS Three LOXL1 single nucleotide polymorphisms (SNPs) (rs1048661, rs3825942, and rs2165241) were analyzed in 109 Turkish patients (44 patients with PEX syndrome, 65 patients with PEX glaucoma) and 47 healthy subjects. RESULTS "A" allele of SNP rs3825942 was underrepresented in control group compared with the glaucoma [odds ratio (OR)=4.5, confidence interval (CI): 95%] and syndrome (OR=4.5, CI: 95%) groups. "AA+AG" genotype of SNP rs3825942 was more frequent in the syndrome group (OR=10, CI: 95%) rather than the control group. "GT" genotype of SNP rs1048661 was presented less frequently in the control group compared with the glaucoma group (OR=4.25, CI: 95%). "T" allele of SNP rs1048661 was more frequent in glaucoma group (OR=2.05, CI: 95%) compared with control group. "T" allele of SNP rs2165241 was more frequent in the syndrome (OR=2.59, CI: 95%) and the glaucoma group (OR=3.78, CI: 95%) compared with the control group. "TT" genotype of SNP rs2165241 was underrepresented in control group compared with the syndrome (OR=3.85, CI: 95%) and the glaucoma (OR=6.58, CI: 95%) group. CONCLUSIONS Findings of this current study indicate a different LOXL1 gene expression pattern compared with a recent study that was also performed in the Turkish population. Other gene replication studies are required to accurately assess genetic factors in the pathogenesis of PEX syndrome and glaucoma.
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168
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Wei Y, Kim TJ, Peng DH, Duan D, Gibbons DL, Yamauchi M, Jackson JR, Le Saux CJ, Calhoun C, Peters J, Derynck R, Backes BJ, Chapman HA. Fibroblast-specific inhibition of TGF-β1 signaling attenuates lung and tumor fibrosis. J Clin Invest 2017; 127:3675-3688. [PMID: 28872461 DOI: 10.1172/jci94624] [Citation(s) in RCA: 134] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2017] [Accepted: 07/18/2017] [Indexed: 12/12/2022] Open
Abstract
TGF-β1 signaling is a critical driver of collagen accumulation and fibrotic disease but also a vital suppressor of inflammation and epithelial cell proliferation. The nature of this multifunctional cytokine has limited the development of global TGF-β1 signaling inhibitors as therapeutic agents. We conducted phenotypic screens for small molecules that inhibit TGF-β1-induced epithelial-mesenchymal transition without immediate TGF-β1 receptor (TβR) kinase inhibition. We identified trihydroxyphenolic compounds as potent blockers of TGF-β1 responses (IC50 ~50 nM), Snail1 expression, and collagen deposition in vivo in models of pulmonary fibrosis and collagen-dependent lung cancer metastasis. Remarkably, the functional effects of trihydroxyphenolics required the presence of active lysyl oxidase-like 2 (LOXL2), thereby limiting effects to fibroblasts or cancer cells, the major LOXL2 producers. Mechanistic studies revealed that trihydroxyphenolics induce auto-oxidation of a LOXL2/3-specific lysine (K731) in a time-dependent reaction that irreversibly inhibits LOXL2 and converts the trihydrophenolic to a previously undescribed metabolite that directly inhibits TβRI kinase. Combined inhibition of LOXL2 and TβRI activities by trihydrophenolics resulted in potent blockade of pathological collagen accumulation in vivo without the toxicities associated with global inhibitors. These findings elucidate a therapeutic approach to attenuate fibrosis and the disease-promoting effects of tissue stiffness by specifically targeting TβRI kinase in LOXL2-expressing cells.
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Affiliation(s)
- Ying Wei
- Department of Medicine, UCSF Cardiovascular Research Institute, San Francisco, California, USA
| | - Thomas J Kim
- Department of Medicine, UCSF Cardiovascular Research Institute, San Francisco, California, USA
| | - David H Peng
- Departments of Thoracic/Head and Neck Medical Oncology and Molecular and Cellular Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Dana Duan
- Department of Cell and Tissue Biology, UCSF, San Francisco, California, USA
| | - Don L Gibbons
- Departments of Thoracic/Head and Neck Medical Oncology and Molecular and Cellular Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Mitsuo Yamauchi
- Oral and Craniofacial Health Sciences, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina, USA
| | - Julia R Jackson
- Department of Medicine, UCSF Cardiovascular Research Institute, San Francisco, California, USA
| | - Claude J Le Saux
- Department of Medicine, UCSF Cardiovascular Research Institute, San Francisco, California, USA.,Department of Pulmonary and Critical Care, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA
| | - Cheresa Calhoun
- Department of Pulmonary and Critical Care, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA
| | - Jay Peters
- Department of Pulmonary and Critical Care, University of Texas Health Science Center at San Antonio, San Antonio, Texas, USA
| | - Rik Derynck
- Department of Cell and Tissue Biology, UCSF, San Francisco, California, USA
| | - Bradley J Backes
- Department of Medicine, UCSF Cardiovascular Research Institute, San Francisco, California, USA
| | - Harold A Chapman
- Department of Medicine, UCSF Cardiovascular Research Institute, San Francisco, California, USA
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169
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Mižíková I, Palumbo F, Tábi T, Herold S, Vadász I, Mayer K, Seeger W, Morty RE. Perturbations to lysyl oxidase expression broadly influence the transcriptome of lung fibroblasts. Physiol Genomics 2017; 49:416-429. [DOI: 10.1152/physiolgenomics.00026.2017] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2017] [Revised: 06/26/2017] [Accepted: 06/29/2017] [Indexed: 01/05/2023] Open
Abstract
Lysyl oxidases are credited with pathogenic roles in lung diseases, including cancer, fibrosis, pulmonary hypertension, congenital diaphragmatic hernia, and bronchopulmonary dysplasia (BPD). Lysyl oxidases facilitate the covalent intra- and intermolecular cross-linking of collagen and elastin fibers, thereby imparting tensile strength to the extracellular matrix (ECM). Alternative ECM-independent roles have recently been proposed for lysyl oxidases, including regulation of growth factor signaling, chromatin remodeling, and transcriptional regulation, all of which impact cell phenotype. We demonstrate here that three of the five lysyl oxidase family members, Lox, Loxl1, and Loxl2, are highly expressed in primary mouse lung fibroblasts compared with other constituent cell types of the lung. Microarray analyses revealed that small interfering RNA knockdown of Lox, Loxl1, and Loxl2 was associated with apparent changes in the expression of 134, 3,761, and 3,554 genes, respectively, in primary mouse lung fibroblasts. The impact of lysyl oxidase expression on steady-state Mmp3, Mmp9, Eln, Rarres1, Gdf10, Ifnb1, Csf2, and Cxcl9 mRNA levels was validated, which is interesting, since the corresponding gene products are relevant to lung development and BPD, where lysyl oxidases play a functional role. In vivo, the expression of these genes broadly correlated with Lox, Loxl1, and Loxl2 expression in a mouse model of BPD. Furthermore, β-aminopropionitrile (BAPN), a selective lysyl oxidase inhibitor, did not affect the steady-state mRNA levels of lysyl oxidase target genes, in vitro in lung fibroblasts or in vivo in BAPN-treated mice. This study is the first to report that lysyl oxidases broadly influence the cell transcriptome.
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Affiliation(s)
- Ivana Mižíková
- Department of Lung Development and Remodelling, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
- Department of Internal Medicine (Pulmonology), University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL), Giessen, Germany; and
| | - Francesco Palumbo
- Department of Lung Development and Remodelling, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
- Department of Internal Medicine (Pulmonology), University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL), Giessen, Germany; and
| | - Tamás Tábi
- Department of Pharmacodynamics, Semmelweis University, Budapest, Hungary
| | - Susanne Herold
- Department of Internal Medicine (Pulmonology), University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL), Giessen, Germany; and
| | - István Vadász
- Department of Internal Medicine (Pulmonology), University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL), Giessen, Germany; and
| | - Konstantin Mayer
- Department of Internal Medicine (Pulmonology), University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL), Giessen, Germany; and
| | - Werner Seeger
- Department of Lung Development and Remodelling, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
- Department of Internal Medicine (Pulmonology), University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL), Giessen, Germany; and
| | - Rory E. Morty
- Department of Lung Development and Remodelling, Max Planck Institute for Heart and Lung Research, Bad Nauheim, Germany
- Department of Internal Medicine (Pulmonology), University of Giessen and Marburg Lung Center (UGMLC), member of the German Center for Lung Research (DZL), Giessen, Germany; and
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170
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Monocyte adhesion to atherosclerotic matrix proteins is enhanced by Asn-Gly-Arg deamidation. Sci Rep 2017; 7:5765. [PMID: 28720870 PMCID: PMC5515959 DOI: 10.1038/s41598-017-06202-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Accepted: 06/09/2017] [Indexed: 12/25/2022] Open
Abstract
Atherosclerosis arises from leukocyte infiltration and thickening of the artery walls and constitutes a major component of vascular disease pathology, but the molecular events underpinning this process are not fully understood. Proteins containing an Asn-Gly-Arg (NGR) motif readily undergo deamidation of asparagine to generate isoDGR structures that bind to integrin αvβ3 on circulating leukocytes. Here we report the identification of isoDGR motifs in human atherosclerotic plaque components including extracellular matrix (ECM) proteins fibronectin and tenascin C, which have been strongly implicated in human atherosclerosis. We further demonstrate that deamidation of NGR motifs in fibronectin and tenascin C leads to increased adhesion of the monocytic cell line U937 and enhanced binding of primary human monocytes, except in the presence of a αvβ3-blocking antibody or the αv-selective inhibitor cilengitide. In contrast, under the same deamidating conditions monocyte-macrophages displayed only weak binding to the alternative ECM component vitronectin which lacks NGR motifs. Together, these findings confirm a critical role for isoDGR motifs in mediating leukocyte adhesion to the ECM via integrin αvβ3 and suggest that protein deamidation may promote the pathological progression of human atherosclerosis by enhancing monocyte recruitment to developing plaques.
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171
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Thrombospondins: A Role in Cardiovascular Disease. Int J Mol Sci 2017; 18:ijms18071540. [PMID: 28714932 PMCID: PMC5536028 DOI: 10.3390/ijms18071540] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2017] [Revised: 07/05/2017] [Accepted: 07/13/2017] [Indexed: 12/16/2022] Open
Abstract
Thrombospondins (TSPs) represent extracellular matrix (ECM) proteins belonging to the TSP family that comprises five members. All TSPs have a complex multidomain structure that permits the interaction with various partners including other ECM proteins, cytokines, receptors, growth factors, etc. Among TSPs, TSP1, TSP2, and TSP4 are the most studied and functionally tested. TSP1 possesses anti-angiogenic activity and is able to activate transforming growth factor (TGF)-β, a potent profibrotic and anti-inflammatory factor. Both TSP2 and TSP4 are implicated in the control of ECM composition in hypertrophic hearts. TSP1, TSP2, and TSP4 also influence cardiac remodeling by affecting collagen production, activity of matrix metalloproteinases and TGF-β signaling, myofibroblast differentiation, cardiomyocyte apoptosis, and stretch-mediated enhancement of myocardial contraction. The development and evaluation of TSP-deficient animal models provided an option to assess the contribution of TSPs to cardiovascular pathology such as (myocardial infarction) MI, cardiac hypertrophy, heart failure, atherosclerosis, and aortic valve stenosis. Targeting of TSPs has a significant therapeutic value for treatment of cardiovascular disease. The activation of cardiac TSP signaling in stress and pressure overload may be therefore beneficial.
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172
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De Maria A, Wilmarth PA, David LL, Bassnett S. Proteomic Analysis of the Bovine and Human Ciliary Zonule. Invest Ophthalmol Vis Sci 2017; 58:573-585. [PMID: 28125844 PMCID: PMC5283081 DOI: 10.1167/iovs.16-20866] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
Purpose The zonule of Zinn (ciliary zonule) is a system of fibers that centers the crystalline lens on the optical axis of the eye. Mutations in zonule components underlie syndromic conditions associated with a broad range of ocular pathologies, including microspherophakia and ectopia lentis. Here, we used HPLC-mass spectrometry to determine the molecular composition of the zonule. Methods Tryptic digests of human and bovine zonular samples were analyzed by HPLC-mass spectrometry. The distribution of selected components was confirmed by immunofluorescence confocal microscopy. In bovine samples, the composition of the equatorial zonule was compared to that of the hyaloid zonule and vitreous humor. Results The 52 proteins common to the zonules of both species accounted for >95% of the zonular protein. Glycoproteins constituted the main structural components, with two proteins, FBN1 and LTBP2, constituting 70%-80% of the protein. Other abundant components were MFAP2, EMILIN-1, and ADAMTSL-6. Lysyl oxidase-like 1, a crosslinking enzyme implicated in collagen and elastin biogenesis, was detected at significant levels. The equatorial and hyaloid zonular samples were compositionally similar to each other, although the hyaloid sample was relatively enriched in the proteoglycan opticin and the fibrillar collagens COL2A1, COL11A1, COL5A2, and COL5A3. Conclusions The zonular proteome was surprisingly complex. In addition to structural components, it contained signaling proteins, protease inhibitors, and crosslinking enzymes. The equatorial and hyaloid zonules were similar in composition, but the latter may form part of a composite structure, the hyaloid membrane, that stabilizes the vitreous face.
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Affiliation(s)
- Alicia De Maria
- Ophthalmology and Visual Sciences, Washington University School of Medicine, St. Louis, Missouri, United States
| | - Phillip A Wilmarth
- Biochemistry and Molecular Biology, Oregon Health and Science University, Portland, Oregon, United States
| | - Larry L David
- Biochemistry and Molecular Biology, Oregon Health and Science University, Portland, Oregon, United States
| | - Steven Bassnett
- Ophthalmology and Visual Sciences, Washington University School of Medicine, St. Louis, Missouri, United States
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173
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Aung T, Ozaki M, Lee MC, Schlötzer-Schrehardt U, Thorleifsson G, Mizoguchi T, Igo RP, Haripriya A, Williams SE, Astakhov YS, Orr AC, Burdon KP, Nakano S, Mori K, Abu-Amero K, Hauser M, Li Z, Prakadeeswari G, Bailey JNC, Cherecheanu AP, Kang JH, Nelson S, Hayashi K, Manabe SI, Kazama S, Zarnowski T, Inoue K, Irkec M, Coca-Prados M, Sugiyama K, Järvelä I, Schlottmann P, Lerner SF, Lamari H, Nilgün Y, Bikbov M, Park KH, Cha SC, Yamashiro K, Zenteno JC, Jonas JB, Kumar RS, Perera SA, Chan ASY, Kobakhidze N, George R, Vijaya L, Do T, Edward DP, de Juan Marcos L, Pakravan M, Moghimi S, Ideta R, Bach-Holm D, Kappelgaard P, Wirostko B, Thomas S, Gaston D, Bedard K, Greer WL, Yang Z, Chen X, Huang L, Sang J, Jia H, Jia L, Qiao C, Zhang H, Liu X, Zhao B, Wang YX, Xu L, Leruez S, Reynier P, Chichua G, Tabagari S, Uebe S, Zenkel M, Berner D, Mossböck G, Weisschuh N, Hoja U, Welge-Luessen UC, Mardin C, Founti P, Chatzikyriakidou A, Pappas T, Anastasopoulos E, Lambropoulos A, Ghosh A, Shetty R, Porporato N, Saravanan V, Venkatesh R, Shivkumar C, Kalpana N, Sarangapani S, Kanavi MR, Beni AN, Yazdani S, Lashay A, Naderifar H, Khatibi N, Fea A, Lavia C, Dallorto L, Rolle T, Frezzotti P, Paoli D, Salvi E, Manunta P, Mori Y, Miyata K, Higashide T, Chihara E, Ishiko S, Yoshida A, Yanagi M, Kiuchi Y, Ohashi T, Sakurai T, Sugimoto T, Chuman H, Aihara M, Inatani M, Miyake M, Gotoh N, Matsuda F, Yoshimura N, Ikeda Y, Ueno M, Sotozono C, Jeoung JW, Sagong M, Park KH, Ahn J, Cruz-Aguilar M, Ezzouhairi SM, Rafei A, Chong YF, Ng XY, Goh SR, Chen Y, Yong VHK, Khan MI, Olawoye OO, Ashaye AO, Ugbede I, Onakoya A, Kizor-Akaraiwe N, Teekhasaenee C, Suwan Y, Supakontanasan W, Okeke S, Uche NJ, Asimadu I, Ayub H, Akhtar F, Kosior-Jarecka E, Lukasik U, Lischinsky I, Castro V, Grossmann RP, Sunaric Megevand G, Roy S, Dervan E, Silke E, Rao A, Sahay P, Fornero P, Cuello O, Sivori D, Zompa T, Mills RA, Souzeau E, Mitchell P, Wang JJ, Hewitt AW, Coote M, Crowston JG, Astakhov SY, Akopov EL, Emelyanov A, Vysochinskaya V, Kazakbaeva G, Fayzrakhmanov R, Al-Obeidan SA, Owaidhah O, Aljasim LA, Chowbay B, Foo JN, Soh RQ, Sim KS, Xie Z, Cheong AWO, Mok SQ, Soo HM, Chen XY, Peh SQ, Heng KK, Husain R, Ho SL, Hillmer AM, Cheng CY, Escudero-Domínguez FA, González-Sarmiento R, Martinon-Torres F, Salas A, Pathanapitoon K, Hansapinyo L, Wanichwecharugruang B, Kitnarong N, Sakuntabhai A, Nguyn HX, Nguyn GTT, Nguyn TV, Zenz W, Binder A, Klobassa DS, Hibberd ML, Davila S, Herms S, Nöthen MM, Moebus S, Rautenbach RM, Ziskind A, Carmichael TR, Ramsay M, Álvarez L, García M, González-Iglesias H, Rodríguez-Calvo PP, Fernández-Vega Cueto L, Oguz Ç, Tamcelik N, Atalay E, Batu B, Aktas D, Kasım B, Wilson MR, Coleman AL, Liu Y, Challa P, Herndon L, Kuchtey RW, Kuchtey J, Curtin K, Chaya CJ, Crandall A, Zangwill LM, Wong TY, Nakano M, Kinoshita S, den Hollander AI, Vesti E, Fingert JH, Lee RK, Sit AJ, Shingleton BJ, Wang N, Cusi D, Qamar R, Kraft P, Pericak-Vance MA, Raychaudhuri S, Heegaard S, Kivelä T, Reis A, Kruse FE, Weinreb RN, Pasquale LR, Haines JL, Thorsteinsdottir U, Jonasson F, Allingham RR, Milea D, Ritch R, Kubota T, Tashiro K, Vithana EN, Micheal S, Topouzis F, Craig JE, Dubina M, Sundaresan P, Stefansson K, Wiggs JL, Pasutto F, Khor CC. Genetic association study of exfoliation syndrome identifies a protective rare variant at LOXL1 and five new susceptibility loci. Nat Genet 2017; 49:993-1004. [PMID: 28553957 DOI: 10.1038/ng.3875] [Citation(s) in RCA: 87] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 04/26/2017] [Indexed: 12/14/2022]
Abstract
Exfoliation syndrome (XFS) is the most common known risk factor for secondary glaucoma and a major cause of blindness worldwide. Variants in two genes, LOXL1 and CACNA1A, have previously been associated with XFS. To further elucidate the genetic basis of XFS, we collected a global sample of XFS cases to refine the association at LOXL1, which previously showed inconsistent results across populations, and to identify new variants associated with XFS. We identified a rare protective allele at LOXL1 (p.Phe407, odds ratio (OR) = 25, P = 2.9 × 10-14) through deep resequencing of XFS cases and controls from nine countries. A genome-wide association study (GWAS) of XFS cases and controls from 24 countries followed by replication in 18 countries identified seven genome-wide significant loci (P < 5 × 10-8). We identified association signals at 13q12 (POMP), 11q23.3 (TMEM136), 6p21 (AGPAT1), 3p24 (RBMS3) and 5q23 (near SEMA6A). These findings provide biological insights into the pathology of XFS and highlight a potential role for naturally occurring rare LOXL1 variants in disease biology.
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Affiliation(s)
- Tin Aung
- Singapore Eye Research Institute, Singapore.,Singapore National Eye Center, Singapore.,Department of Ophthalmology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Mineo Ozaki
- Ozaki Eye Hospital, Hyuga, Miyazaki, Japan.,Department of Ophthalmology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Mei Chin Lee
- Singapore Eye Research Institute, Singapore.,Academic Clinical Program for Ophthalmology and Visual Sciences, Office of Clinical and Academic Faculty Affairs, Duke-NUS Graduate Medical School, Singapore
| | - Ursula Schlötzer-Schrehardt
- Department of Ophthalmology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | | | | | - Robert P Igo
- Department of Population and Quantitative Health Sciences, Case Western Reserve University, Cleveland, Ohio, USA
| | | | - Susan E Williams
- Division of Ophthalmology, University of the Witwatersrand, Johannesburg, South Africa
| | - Yury S Astakhov
- Department of Ophthalmology, Pavlov First Saint Petersburg State Medical University, St. Petersburg, Russia
| | - Andrew C Orr
- Department of Ophthalmology, Dalhousie University, Halifax, Nova Scotia, Canada.,Department of Pathology, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Kathryn P Burdon
- Department of Ophthalmology, Flinders University, Adelaide, South Australia, Australia.,Menzies Institute for Medical Research, University of Tasmania, Hobart, Tasmania, Australia
| | - Satoko Nakano
- Department of Ophthalmology, Oita University Faculty of Medicine, Oita, Japan
| | - Kazuhiko Mori
- Department of Ophthalmology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Khaled Abu-Amero
- Department of Ophthalmology, College of Medicine, King Saud University, Riyadh, Saudi Arabia.,Department of Ophthalmology, College of Medicine, University of Florida, Jacksonville, Florida, USA
| | - Michael Hauser
- Singapore Eye Research Institute, Singapore.,Department of Ophthalmology, Duke University Eye Center, Durham, North Carolina, USA.,Department of Medicine, Duke University Medical Center, Durham, North Carolina, USA
| | - Zheng Li
- Genome Institute of Singapore, Singapore
| | | | - Jessica N Cooke Bailey
- Department of Population and Quantitative Health Sciences, Case Western Reserve University, Cleveland, Ohio, USA
| | - Alina Popa Cherecheanu
- 'Carol Davila' University of Medicine and Pharmacy, Bucharest, Romania.,Department of Ophthalmology, University Emergency Hospital, Bucharest, Romania
| | - Jae H Kang
- Channing Division of Network Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Sarah Nelson
- Department of Biostatistics, University of Washington, Seattle, Washington, USA
| | | | | | | | - Tomasz Zarnowski
- Department of Diagnostics and Microsurgery of Glaucoma, Medical University, Lublin, Poland
| | | | - Murat Irkec
- Department of Ophthalmology, Hacettepe University, Faculty of Medicine, Ankara, Turkey
| | - Miguel Coca-Prados
- Fernández-Vega University Institute and Foundation of Ophthalmological Research, University of Oviedo, Oviedo, Spain.,Fernández-Vega Ophthalmological Institute, Oviedo, Spain.,Department of Ophthalmology and Visual Science, Yale University School of Medicine, New Haven, Connecticut, USA
| | - Kazuhisa Sugiyama
- Department of Ophthalmology, Kanazawa University Graduate School of Medical Science, Kanazawa, Japan
| | - Irma Järvelä
- Department of Medical Genetics, University of Helsinki, Helsinki, Finland
| | | | - S Fabian Lerner
- Fundación para el Estudio del Glaucoma, Buenos Aires, Argentina
| | - Hasnaa Lamari
- Clinique Spécialisée en Ophtalmologie Mohammedia, Mohammedia, Morocco
| | - Yildirim Nilgün
- Department of Ophthalmology, Eskisehir Osmangazi University, Meselik, Eskisehir, Turkey
| | | | - Ki Ho Park
- Department of Ophthalmology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Soon Cheol Cha
- Department of Ophthalmology, Yeungnam University College of Medicine, Daegu, Republic of Korea
| | - Kenji Yamashiro
- Department of Ophthalmology and Visual Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Department of Ophthalmology, Otsu Red Cross Hospital, Otsu, Japan
| | - Juan C Zenteno
- Genetics Department, Institute of Ophthalmology 'Conde de Valenciana', Mexico City, Mexico.,Biochemistry Department, Faculty of Medicine, UNAM, Mexico City, Mexico
| | - Jost B Jonas
- Department of Ophthalmology, Medical Faculty Mannheim of the Ruprecht Karls University of Heidelberg, Mannheim, Germany.,Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology and Visual Science Key Laboratory, Beijing, China
| | | | - Shamira A Perera
- Singapore Eye Research Institute, Singapore.,Singapore National Eye Center, Singapore
| | - Anita S Y Chan
- Singapore Eye Research Institute, Singapore.,Singapore National Eye Center, Singapore.,Academic Clinical Program for Ophthalmology and Visual Sciences, Office of Clinical and Academic Faculty Affairs, Duke-NUS Graduate Medical School, Singapore
| | | | - Ronnie George
- Jadhavbhai Nathamal Singhvi Department of Glaucoma, Medical Research Foundation, Chennai, India
| | - Lingam Vijaya
- Jadhavbhai Nathamal Singhvi Department of Glaucoma, Medical Research Foundation, Chennai, India
| | - Tan Do
- Vietnam National Institute of Ophthalmology, Hanoi, Vietnam
| | - Deepak P Edward
- King Khaled Eye Specialist Hospital, Riyadh, Saudi Arabia.,Department of Ophthalmology and Visual Sciences, Illinois Eye and Ear Infirmary, College of Medicine, University of Illinois at Chicago, Chicago, Illinois, USA
| | - Lourdes de Juan Marcos
- Department of Ophthalmology, University Hospital of Salamanca, Salamanca, Spain.,Institute for Biomedical Research of Salamanca (IBSAL), Salamanca, Spain
| | - Mohammad Pakravan
- Ophthalmic Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Sasan Moghimi
- Farabi Eye Hospital, Tehran University Eye Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | | | | | | | - Barbara Wirostko
- John A. Moran Eye Center, Department of Ophthalmology, University of Utah, Salt Lake City, Utah, USA
| | - Samuel Thomas
- John A. Moran Eye Center, Department of Ophthalmology, University of Utah, Salt Lake City, Utah, USA
| | - Daniel Gaston
- Department of Pathology, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Karen Bedard
- Department of Pathology, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Wenda L Greer
- Department of Pathology, Dalhousie University, Halifax, Nova Scotia, Canada
| | - Zhenglin Yang
- Sichuan Provincial Key Laboratory for Human Disease Gene Study, Sichuan Provincial People's Hospital, University of Electronic Science and Technology of China, Chengdu, China.,School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Xueyi Chen
- Department of Ophthalmology, First Affiliated Hospital of Xinjiang Medical University, Urumchi, China
| | - Lulin Huang
- Center for Human Molecular Biology and Genetics, Institute of Laboratory Medicine, Sichuan Academy of Medical Sciences and Sichuan Provincial People's Hospital, Chengdu, China.,Sichuan Translational Research Hospital, Chinese Academy of Sciences, Chengdu, China
| | - Jinghong Sang
- Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology and Visual Science Key Laboratory, Beijing, China
| | - Hongyan Jia
- Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology and Visual Science Key Laboratory, Beijing, China
| | - Liyun Jia
- Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology and Visual Science Key Laboratory, Beijing, China.,Beijing Institute of Ophthalmology, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Chunyan Qiao
- Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology and Visual Science Key Laboratory, Beijing, China
| | - Hui Zhang
- Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology and Visual Science Key Laboratory, Beijing, China
| | - Xuyang Liu
- Shenzhen Key Laboratory of Ophthalmology, Shenzhen Eye Hospital, Jinan University, Shenzhen, China
| | - Bowen Zhao
- Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology and Visual Science Key Laboratory, Beijing, China.,Beijing Institute of Ophthalmology, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Ya-Xing Wang
- Beijing Institute of Ophthalmology, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Liang Xu
- Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology and Visual Science Key Laboratory, Beijing, China
| | - Stéphanie Leruez
- Département d'Ophtalmologie, Centre Hospitalier Universitaire, Angers, France
| | - Pascal Reynier
- Département de Biochimie et Génétique, Centre Hospitalier Universitaire, Angers, France
| | | | | | - Steffen Uebe
- Institute of Human Genetics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Matthias Zenkel
- Department of Ophthalmology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Daniel Berner
- Department of Ophthalmology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Georg Mossböck
- Department of Ophthalmology, Medical University Graz, Graz, Austria
| | - Nicole Weisschuh
- Institute for Ophthalmic Research, Centre for Ophthalmology, University of Tübingen, Tübingen, Germany
| | - Ursula Hoja
- Department of Ophthalmology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Ulrich-Christoph Welge-Luessen
- Department of Ophthalmology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Christian Mardin
- Department of Ophthalmology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Panayiota Founti
- Department of Ophthalmology, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Anthi Chatzikyriakidou
- Laboratory of General Biology, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Theofanis Pappas
- Department of Ophthalmology, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Eleftherios Anastasopoulos
- Department of Ophthalmology, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Alexandros Lambropoulos
- Laboratory of General Biology, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Arkasubhra Ghosh
- GROW Research Laboratory, Narayana Nethralaya Foundation, Bangalore, India
| | - Rohit Shetty
- Narayana Nethralaya Eye Hospital, Bangalore, India
| | | | - Vijayan Saravanan
- Department of Genetics, Aravind Medical Research Foundation, Madurai, India
| | | | | | | | | | - Mozhgan R Kanavi
- Ocular Tissue Engineering Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Afsaneh Naderi Beni
- Ophthalmic Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Shahin Yazdani
- Ophthalmic Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Alireza Lashay
- Farabi Eye Hospital, Tehran University Eye Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Homa Naderifar
- Farabi Eye Hospital, Tehran University Eye Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Nassim Khatibi
- Farabi Eye Hospital, Tehran University Eye Research Center, Tehran University of Medical Sciences, Tehran, Iran
| | - Antonio Fea
- Dipartimento di Scienze Chirurgiche, Università di Torino, Turin, Italy
| | - Carlo Lavia
- Dipartimento di Scienze Chirurgiche, Università di Torino, Turin, Italy
| | - Laura Dallorto
- Dipartimento di Scienze Chirurgiche, Università di Torino, Turin, Italy
| | - Teresa Rolle
- Dipartimento di Scienze Chirurgiche, Università di Torino, Turin, Italy
| | - Paolo Frezzotti
- Ophthalmology Unit, Department of Medicine, Surgery and Neuroscience, University of Siena, Siena, Italy
| | - Daniela Paoli
- Department of Ophthalmology, Monfalcone Hospital, Gorizia, Italy
| | - Erika Salvi
- Department of Health Sciences, University of Milan, Milan, Italy
| | - Paolo Manunta
- Department of Nephrology, University Vita-Salute San Raffaele, Milan, Italy
| | | | | | - Tomomi Higashide
- Department of Ophthalmology, Kanazawa University Graduate School of Medical Science, Kanazawa, Japan
| | | | - Satoshi Ishiko
- Department of Medicine and Engineering Combined Research Institute, Asahikawa Medical University, Asahikawa, Japan
| | - Akitoshi Yoshida
- Department of Ophthalmology, Asahikawa Medical University, Asahikawa, Japan
| | - Masahide Yanagi
- Department of Ophthalmology and Visual Sciences, Hiroshima University, Hiroshima, Japan
| | - Yoshiaki Kiuchi
- Department of Ophthalmology and Visual Sciences, Hiroshima University, Hiroshima, Japan
| | | | | | - Takako Sugimoto
- Department of Ophthalmology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Hideki Chuman
- Department of Ophthalmology, Faculty of Medicine, University of Miyazaki, Miyazaki, Japan
| | - Makoto Aihara
- Department of Ophthalmology, University of Tokyo, Tokyo, Japan
| | - Masaru Inatani
- Department of Ophthalmology, Faculty of Medical Science, University of Fukui, Fukui, Japan
| | - Masahiro Miyake
- Department of Ophthalmology and Visual Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Norimoto Gotoh
- Center for Genomic Medicine, INSERM U852, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Fumihiko Matsuda
- Center for Genomic Medicine, INSERM U852, Kyoto University Graduate School of Medicine, Kyoto, Japan
| | - Nagahisa Yoshimura
- Department of Ophthalmology and Visual Sciences, Kyoto University Graduate School of Medicine, Kyoto, Japan.,Tazuke Kofukai Foundation, Medical Research Institute, Kitano Hospital, Osaka, Japan
| | - Yoko Ikeda
- Department of Ophthalmology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Morio Ueno
- Department of Ophthalmology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Chie Sotozono
- Department of Ophthalmology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Jin Wook Jeoung
- Department of Ophthalmology, Seoul National University Hospital, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Min Sagong
- Department of Ophthalmology, Yeungnam University College of Medicine, Daegu, Republic of Korea
| | - Kyu Hyung Park
- Department of Ophthalmology, Seoul National University Bundang Hospital, Gyeonggi, Republic of Korea
| | - Jeeyun Ahn
- Department of Ophthalmology, Seoul Metropolitan Government Seoul National University Boramae Medical Center, Seoul, Republic of Korea
| | - Marisa Cruz-Aguilar
- Genetics Department, Institute of Ophthalmology 'Conde de Valenciana', Mexico City, Mexico
| | - Sidi M Ezzouhairi
- Clinique Spécialisée en Ophtalmologie Mohammedia, Mohammedia, Morocco
| | | | | | - Xiao Yu Ng
- Singapore Eye Research Institute, Singapore
| | | | | | | | - Muhammad Imran Khan
- Department of Human Genetics, Radboud University Medical Centre, Nijmegen, the Netherlands
| | - Olusola O Olawoye
- Department of Ophthalmology, College of Medicine, University of Ibadan, Ibadan, Nigeria.,Department of Ophthalmology, University College Hospital, Ibadan, Nigeria
| | - Adeyinka O Ashaye
- Department of Ophthalmology, College of Medicine, University of Ibadan, Ibadan, Nigeria.,Department of Ophthalmology, University College Hospital, Ibadan, Nigeria
| | | | - Adeola Onakoya
- Department of Ophthalmology, University of Lagos, Lagos, Nigeria.,Guinness Eye Centre, Lagos University Teaching Hospital, Lagos, Nigeria
| | - Nkiru Kizor-Akaraiwe
- Department of Ophthalmology, ESUT Teaching Hospital Parklane, Enugu, Nigeria.,Eye Specialists Hospital, Enugu, Nigeria
| | - Chaiwat Teekhasaenee
- Department of Ophthalmology, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Yanin Suwan
- Department of Ophthalmology, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Wasu Supakontanasan
- Department of Ophthalmology, Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Suhanya Okeke
- Department of Ophthalmology, ESUT Teaching Hospital Parklane, Enugu, Nigeria.,Eye Specialists Hospital, Enugu, Nigeria
| | - Nkechi J Uche
- Eye Specialists Hospital, Enugu, Nigeria.,Department of Ophthalmology, University of Nigeria Teaching Hospital, Ituku-Ozalla, Enugu, Nigeria.,Department of Ophthalmology, College of Medicine, University of Nigeria, Nsukka, Ituku Ozalla Campus, Enugu, Nigeria
| | - Ifeoma Asimadu
- Department of Ophthalmology, ESUT Teaching Hospital Parklane, Enugu, Nigeria
| | - Humaira Ayub
- Department of Environmental Sciences, COMSATS Institute of Information Technology, Abbottabad, Pakistan
| | - Farah Akhtar
- Pakistan Institute of Ophthalmology, Al-Shifa Trust Eye Hospital, Rawalpindi, Pakistan
| | - Ewa Kosior-Jarecka
- Department of Diagnostics and Microsurgery of Glaucoma, Medical University, Lublin, Poland
| | - Urszula Lukasik
- Department of Diagnostics and Microsurgery of Glaucoma, Medical University, Lublin, Poland
| | | | - Vania Castro
- Universidad Peruana Cayetano Heredia, Hospital Nacional Arzobispo Loayza, Lima, Peru
| | | | - Gordana Sunaric Megevand
- Clinical Research Centre Adolphe de Rothschild, Société Médicale de Beaulieu, Geneva, Switzerland
| | - Sylvain Roy
- Clinical Research Centre Adolphe de Rothschild, Société Médicale de Beaulieu, Geneva, Switzerland
| | - Edward Dervan
- Mater Misericordiae University Hospital, Dublin, Ireland
| | - Eoin Silke
- Mater Misericordiae University Hospital, Dublin, Ireland
| | - Aparna Rao
- Shri Mithu Tulsi, LV Prasad Eye Institute, Bhubaneswar, India
| | - Priti Sahay
- Shri Mithu Tulsi, LV Prasad Eye Institute, Bhubaneswar, India
| | | | | | - Delia Sivori
- Fundación para el Estudio del Glaucoma, Buenos Aires, Argentina
| | - Tamara Zompa
- Centro Oftalmologico Charles, Buenos Aires, Argentina
| | - Richard A Mills
- Department of Ophthalmology, Flinders University, Adelaide, South Australia, Australia
| | - Emmanuelle Souzeau
- Department of Ophthalmology, Flinders University, Adelaide, South Australia, Australia
| | - Paul Mitchell
- Centre for Vision Research, Department of Ophthalmology and Westmead Institute for Medical Research, University of Sydney, Sydney, New South Wales, Australia
| | - Jie Jin Wang
- Centre for Vision Research, Department of Ophthalmology and Westmead Institute for Medical Research, University of Sydney, Sydney, New South Wales, Australia
| | - Alex W Hewitt
- Menzies Institute for Medical Research, University of Tasmania, Hobart, Tasmania, Australia.,Centre for Eye Research Australia (CERA), University of Melbourne, Royal Victorian Eye and Ear Hospital, Melbourne, Victoria, Australia
| | - Michael Coote
- Centre for Eye Research Australia (CERA), University of Melbourne, Royal Victorian Eye and Ear Hospital, Melbourne, Victoria, Australia
| | - Jonathan G Crowston
- Centre for Eye Research Australia (CERA), University of Melbourne, Royal Victorian Eye and Ear Hospital, Melbourne, Victoria, Australia
| | - Sergei Y Astakhov
- Department of Ophthalmology, Pavlov First Saint Petersburg State Medical University, St. Petersburg, Russia
| | - Eugeny L Akopov
- Department of Ophthalmology, Pavlov First Saint Petersburg State Medical University, St. Petersburg, Russia
| | - Anton Emelyanov
- Department of Ophthalmology, Pavlov First Saint Petersburg State Medical University, St. Petersburg, Russia.,St. Petersburg Academic University, St. Petersburg, Russia
| | | | | | | | - Saleh A Al-Obeidan
- Department of Ophthalmology, College of Medicine, King Saud University, Riyadh, Saudi Arabia
| | - Ohoud Owaidhah
- King Khaled Eye Specialist Hospital, Riyadh, Saudi Arabia
| | | | - Balram Chowbay
- Clinical Pharmacology, SingHealth, Singapore.,Clinical Pharmacology Laboratory, National Cancer Centre, Singapore.,Office of Clinical Sciences, Duke-NUS Medical School, Singapore
| | - Jia Nee Foo
- Genome Institute of Singapore, Singapore.,Lee Kong Chian School of Medicine, Nanyang Technological University, Singapore
| | | | | | | | | | - Shi Qi Mok
- Genome Institute of Singapore, Singapore
| | | | | | - Su Qin Peh
- Genome Institute of Singapore, Singapore
| | | | | | - Su-Ling Ho
- Department of Ophthalmology, Tan Tock Seng Hospital, Singapore
| | | | - Ching-Yu Cheng
- Singapore Eye Research Institute, Singapore.,Singapore National Eye Center, Singapore.,Department of Ophthalmology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore.,Academic Clinical Program for Ophthalmology and Visual Sciences, Office of Clinical and Academic Faculty Affairs, Duke-NUS Graduate Medical School, Singapore
| | | | - Rogelio González-Sarmiento
- Institute for Biomedical Research of Salamanca (IBSAL), Salamanca, Spain.,Molecular Medicine Unit, Department of Medicine, University of Salamanca, Salamanca, Spain
| | - Frederico Martinon-Torres
- Translational Pediatrics and Infectious Diseases, Hospital Clínico Universitario de Santiago, Santiago de Compostela, Spain.,GENVIP Research Group, Instituto de Investigación Sanitaria de Santiago, Santiago de Compostela, Spain
| | - Antonio Salas
- Unidade de Xenética, Departamento de Anatomía Patolóxica e Ciencias Forenses, Instituto de Ciencias Forenses, Facultade de Medicina, Universidade de Santiago de Compostela, Santiago de Compostela, Spain.,Instituto de Ciencias Forenses, Facultade de Medicina, Universidade de Santiago de Compostela, Santiago de Compostela, Spain
| | - Kessara Pathanapitoon
- Department of Ophthalmology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | - Linda Hansapinyo
- Department of Ophthalmology, Faculty of Medicine, Chiang Mai University, Chiang Mai, Thailand
| | | | - Naris Kitnarong
- Department of Ophthalmology, Faculty of Medicine, Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Anavaj Sakuntabhai
- Institut Pasteur, Functional Genetics of Infectious Diseases Unit, Department of Genomes and Genetics, Paris, France.,Centre National de la Recherche Scientifique, Unité de Recherche Associée 3012, Paris, France
| | - Hip X Nguyn
- Vietnam National Institute of Ophthalmology, Hanoi, Vietnam
| | | | - Trình V Nguyn
- Vietnam National Institute of Ophthalmology, Hanoi, Vietnam
| | - Werner Zenz
- Department of General Pediatrics, Medical University of Graz, Graz, Austria
| | - Alexander Binder
- Department of General Pediatrics, Medical University of Graz, Graz, Austria
| | - Daniela S Klobassa
- Department of General Pediatrics, Medical University of Graz, Graz, Austria
| | - Martin L Hibberd
- Genome Institute of Singapore, Singapore.,Faculty of Infectious and Tropical Disease, London School of Hygiene and Tropical Medicine, London, UK
| | | | - Stefan Herms
- Department of Genomics, Life &Brain Center, University of Bonn, Bonn, Germany.,Department of Biomedicine, University of Basel, Basel, Switzerland.,Division of Medical Genetics, University Hospital Basel, Basel, Switzerland
| | - Markus M Nöthen
- Department of Genomics, Life &Brain Center, University of Bonn, Bonn, Germany.,Institute of Human Genetics, University of Bonn, Bonn, Germany
| | - Susanne Moebus
- Institute for Medical Informatics, Biometry and Epidemiology, University Hospital of Essen, University Duisburg-Essen, Essen, Germany
| | - Robyn M Rautenbach
- Division of Ophthalmology, Stellenbosch University and Tygerberg Hospital, Cape Town, South Africa
| | - Ari Ziskind
- Division of Ophthalmology, Stellenbosch University and Tygerberg Hospital, Cape Town, South Africa
| | - Trevor R Carmichael
- Division of Ophthalmology, University of the Witwatersrand, Johannesburg, South Africa
| | - Michele Ramsay
- Sydney Brenner Institute for Molecular Bioscience, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Lydia Álvarez
- Fernández-Vega University Institute and Foundation of Ophthalmological Research, University of Oviedo, Oviedo, Spain.,Fernández-Vega Ophthalmological Institute, Oviedo, Spain
| | - Montserrat García
- Fernández-Vega University Institute and Foundation of Ophthalmological Research, University of Oviedo, Oviedo, Spain.,Fernández-Vega Ophthalmological Institute, Oviedo, Spain
| | - Héctor González-Iglesias
- Fernández-Vega University Institute and Foundation of Ophthalmological Research, University of Oviedo, Oviedo, Spain.,Fernández-Vega Ophthalmological Institute, Oviedo, Spain
| | - Pedro P Rodríguez-Calvo
- Fernández-Vega University Institute and Foundation of Ophthalmological Research, University of Oviedo, Oviedo, Spain.,Fernández-Vega Ophthalmological Institute, Oviedo, Spain
| | - Luis Fernández-Vega Cueto
- Fernández-Vega University Institute and Foundation of Ophthalmological Research, University of Oviedo, Oviedo, Spain.,Fernández-Vega Ophthalmological Institute, Oviedo, Spain
| | - Çilingir Oguz
- Department of Genetics, Eskisehir Osmangazi University, Meselik, Eskisehir, Turkey
| | - Nevbahar Tamcelik
- Istanbul University Cerrahpasa Faculty of Medicine, Istanbul, Turkey
| | - Eray Atalay
- Singapore Eye Research Institute, Singapore.,Istanbul University Cerrahpasa Faculty of Medicine, Istanbul, Turkey
| | - Bilge Batu
- Istanbul University Cerrahpasa Faculty of Medicine, Istanbul, Turkey
| | - Dilek Aktas
- DAMAGEN Genetic Diagnostic Center, Ankara, Turkey
| | - Burcu Kasım
- Department of Ophthalmology, Hacettepe University, Faculty of Medicine, Ankara, Turkey
| | - M Roy Wilson
- School of Medicine, Wayne State University, Detroit, Michigan, USA
| | - Anne L Coleman
- Center for Community Outreach and Policy, Stein Eye Institute, David Geffen School of Medicine at UCLA, Los Angeles, California, USA
| | - Yutao Liu
- Department of Cellular Biology and Anatomy, Center for Biotechnology and Genomic Medicine, James and Jean Culver Discovery Institute, Augusta University, Augusta, Georgia, USA
| | - Pratap Challa
- Department of Ophthalmology, Duke University Eye Center, Durham, North Carolina, USA
| | - Leon Herndon
- Department of Ophthalmology, Duke University Eye Center, Durham, North Carolina, USA
| | - Rachel W Kuchtey
- Vanderbilt Eye Institute, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - John Kuchtey
- Vanderbilt Eye Institute, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Karen Curtin
- John A. Moran Eye Center, Department of Ophthalmology, University of Utah, Salt Lake City, Utah, USA
| | - Craig J Chaya
- John A. Moran Eye Center, Department of Ophthalmology, University of Utah, Salt Lake City, Utah, USA
| | - Alan Crandall
- John A. Moran Eye Center, Department of Ophthalmology, University of Utah, Salt Lake City, Utah, USA
| | - Linda M Zangwill
- Hamilton Glaucoma Center, Department of Ophthalmology and Shiley Eye Institute, University of California, San Diego, San Diego, California, USA
| | - Tien Yin Wong
- Singapore Eye Research Institute, Singapore.,Singapore National Eye Center, Singapore.,Department of Ophthalmology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Masakazu Nakano
- Department of Genomic Medical Sciences, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Shigeru Kinoshita
- Department of Ophthalmology, Kyoto Prefectural University of Medicine, Kyoto, Japan.,Department of Frontier Medical Science and Technology for Ophthalmology, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Anneke I den Hollander
- Department of Human Genetics, Radboud University Medical Centre, Nijmegen, the Netherlands.,Department of Ophthalmology, Radboud University Medical Centre, Nijmegen, the Netherlands
| | - Eija Vesti
- Department of Ophthalmology, University of Turku and Turku University Hospital, Turku, Finland
| | - John H Fingert
- Institute for Vision Research, University of Iowa, Iowa City, Iowa, USA.,Department of Ophthalmology and Visual Sciences, Carver College of Medicine, University of Iowa, Iowa City, Iowa, USA
| | - Richard K Lee
- Bascom Palmer Eye Institute, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Arthur J Sit
- Department of Ophthalmology, Mayo Clinic, Rochester, Minnesota, USA
| | | | - Ningli Wang
- Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology and Visual Science Key Laboratory, Beijing, China.,Beijing Institute of Ophthalmology, Beijing Tongren Hospital, Capital Medical University, Beijing, China
| | - Daniele Cusi
- Institute of Biomedical Technologies, Italian National Research Centre (ITB-CNR), Segrate-Milano, Italy
| | - Raheel Qamar
- Department of Biosciences, COMSATS Institute of Information Technology, Islamabad, Pakistan.,Department of Biochemistry, Al-Nafees Medical College and Hospital, Isra University, Islamabad, Pakistan
| | - Peter Kraft
- Department of Epidemiology, Harvard T.H. Chan School of Public Health, Boston, Massachusetts, USA
| | - Margaret A Pericak-Vance
- John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, Florida, USA
| | - Soumya Raychaudhuri
- Divisions of Genetics and Rheumatology, Department of Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA.,Partners Center for Personalized Genetic Medicine, Boston, Massachusetts, USA.,Program in Medical and Population Genetics, Broad Institute of MIT and Harvard, Cambridge, Massachusetts, USA.,Institute of Inflammation and Repair, University of Manchester, Manchester, UK.,Rheumatology Unit, Department of Medicine, Karolinska Institutet and Karolinska University Hospital Solna, Stockholm, Sweden
| | - Steffen Heegaard
- Department of Ophthalmology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.,Department of Pathology, Rigshospitalet, Eye Pathology Section, University of Copenhagen, Copenhagen, Denmark
| | - Tero Kivelä
- Department of Ophthalmology, University of Helsinki and Helsinki University Hospital, Helsinki, Finland
| | - André Reis
- David Tvildiani Medical University, Tbilisi, Georgia
| | - Friedrich E Kruse
- Department of Ophthalmology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Robert N Weinreb
- Hamilton Glaucoma Center, Department of Ophthalmology and Shiley Eye Institute, University of California, San Diego, San Diego, California, USA
| | - Louis R Pasquale
- Channing Division of Network Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA.,Department of Ophthalmology, Harvard Medical School, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts, USA
| | - Jonathan L Haines
- Department of Population and Quantitative Health Sciences, Case Western Reserve University, Cleveland, Ohio, USA.,Institute of Computational Biology, Case Western Reserve University, Cleveland, Ohio, USA
| | - Unnur Thorsteinsdottir
- deCODE Genetics, Reykjavik, Iceland.,Faculty of Medicine, University of Iceland, Reykjavik, Iceland
| | - Fridbert Jonasson
- Faculty of Medicine, University of Iceland, Reykjavik, Iceland.,Department of Ophthalmology, Landspitali University Hospital, Reykjavik, Iceland
| | - R Rand Allingham
- Singapore Eye Research Institute, Singapore.,Department of Ophthalmology, Duke University Eye Center, Durham, North Carolina, USA
| | - Dan Milea
- Singapore Eye Research Institute, Singapore.,Singapore National Eye Center, Singapore.,Academic Clinical Program for Ophthalmology and Visual Sciences, Office of Clinical and Academic Faculty Affairs, Duke-NUS Graduate Medical School, Singapore
| | - Robert Ritch
- Einhorn Clinical Research Center, New York Eye and Ear Infirmary of Mount Sinai, New York, New York, USA
| | - Toshiaki Kubota
- Department of Ophthalmology, Oita University Faculty of Medicine, Oita, Japan
| | - Kei Tashiro
- Department of Genomic Medical Sciences, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Eranga N Vithana
- Singapore Eye Research Institute, Singapore.,Department of Ophthalmology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
| | - Shazia Micheal
- Department of Ophthalmology, Radboud University Medical Centre, Nijmegen, the Netherlands
| | - Fotis Topouzis
- Department of Ophthalmology, School of Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece
| | - Jamie E Craig
- Department of Ophthalmology, Flinders University, Adelaide, South Australia, Australia
| | - Michael Dubina
- Department of Ophthalmology, Pavlov First Saint Petersburg State Medical University, St. Petersburg, Russia.,St. Petersburg Academic University, St. Petersburg, Russia
| | - Periasamy Sundaresan
- Dr. G.Venkataswamy Eye Research Institute, Aravind Medical Research Foundation, Aravind Eye Hospital, Madurai, India
| | - Kari Stefansson
- deCODE Genetics, Reykjavik, Iceland.,Faculty of Medicine, University of Iceland, Reykjavik, Iceland
| | - Janey L Wiggs
- Department of Ophthalmology, Harvard Medical School, Massachusetts Eye and Ear Infirmary, Boston, Massachusetts, USA
| | - Francesca Pasutto
- Institute of Human Genetics, Friedrich-Alexander-Universität Erlangen-Nürnberg, Erlangen, Germany
| | - Chiea Chuen Khor
- Singapore Eye Research Institute, Singapore.,Genome Institute of Singapore, Singapore.,Department of Biochemistry, Yong Loo Lin School of Medicine, National University of Singapore, Singapore
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174
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Pasutto F, Zenkel M, Hoja U, Berner D, Uebe S, Ferrazzi F, Schödel J, Liravi P, Ozaki M, Paoli D, Frezzotti P, Mizoguchi T, Nakano S, Kubota T, Manabe S, Salvi E, Manunta P, Cusi D, Gieger C, Wichmann HE, Aung T, Khor CC, Kruse FE, Reis A, Schlötzer-Schrehardt U. Pseudoexfoliation syndrome-associated genetic variants affect transcription factor binding and alternative splicing of LOXL1. Nat Commun 2017; 8:15466. [PMID: 28534485 PMCID: PMC5457519 DOI: 10.1038/ncomms15466] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Accepted: 03/27/2017] [Indexed: 02/08/2023] Open
Abstract
Although lysyl oxidase-like 1 (LOXL1) is known as the principal genetic risk factor for pseudoexfoliation (PEX) syndrome, a major cause of glaucoma and cardiovascular complications, no functional variants have been identified to date. Here, we conduct a genome-wide association scan on 771 German PEX patients and 1,350 controls, followed by independent testing of associated variants in Italian and Japanese data sets. We focus on a 3.5-kb four-component polymorphic locus positioned spanning introns 1 and 2 of LOXL1 with enhancer-like chromatin features. We find that the rs11638944:C>G transversion exerts a cis-acting effect on the expression levels of LOXL1, mediated by differential binding of the transcription factor RXRα (retinoid X receptor alpha) and by modulating alternative splicing of LOXL1, eventually leading to reduced levels of LOXL1 mRNA in cells and tissues of risk allele carriers. These findings uncover a functional mechanism by which common noncoding variants influence LOXL1 expression. LOXL1 is a genetic risk factor for pseudoexfoliation syndrome of the eye but a causal variant has not been identified. Here, Pasutto et al., find intronic LOXL1 risk variants influence transcription factor binding and alternative splicing of LOXL1 in affected tissues reducing levels of LOXL1 mRNA.
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Affiliation(s)
- Francesca Pasutto
- Institute of Human Genetics, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schwabachanlage 10, 91054 Erlangen, Germany
| | - Matthias Zenkel
- Department of Ophthalmology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schwabachanlage 6, 91054 Erlangen, Germany
| | - Ursula Hoja
- Department of Ophthalmology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schwabachanlage 6, 91054 Erlangen, Germany
| | - Daniel Berner
- Department of Ophthalmology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schwabachanlage 6, 91054 Erlangen, Germany
| | - Steffen Uebe
- Institute of Human Genetics, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schwabachanlage 10, 91054 Erlangen, Germany
| | - Fulvia Ferrazzi
- Institute of Human Genetics, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schwabachanlage 10, 91054 Erlangen, Germany
| | - Johannes Schödel
- Department of Nephrology and Hypertension, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Ulmenweg 18, 91054 Erlangen, Germany
| | - Panah Liravi
- Department of Ophthalmology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schwabachanlage 6, 91054 Erlangen, Germany
| | - Mineo Ozaki
- Ozaki Eye Hospital, 1-15 Kamezaki, Hyuga, Miyazaki 883-0066, Japan
| | - Daniela Paoli
- Ospedale Monfalcone, Centro Glaucomi, Via Galvani 1, 34074 Monfalcone, Italy
| | - Paolo Frezzotti
- Ophthalmology Unit, Department of Medicine, Surgery and Neuroscience, University of Siena, Viale Bracci SNC, 53100 Siena, Italy
| | - Takanori Mizoguchi
- Mizoguchi Eye Clinic, 6-13 Tawara-machi, Sasebo, Nagasaki 857-0016, Japan
| | - Satoko Nakano
- Department of Ophthalmology, Oita University, Faculty of Medicine, 1-1 Idaigaoka, Hasana-machi, Oita 879-5593, Japan
| | - Toshiaki Kubota
- Department of Ophthalmology, Oita University, Faculty of Medicine, 1-1 Idaigaoka, Hasana-machi, Oita 879-5593, Japan
| | - Shinichi Manabe
- Hayashi Eye Hospital, 4-23-35 Hakataekimae, Hakata-ku, Fukuoka 812-0011, Japan
| | - Erika Salvi
- Department of Health Sciences, University of Milano, Via Ortles 22/4, 20139 Milano, Italy
| | - Paolo Manunta
- Department of Nephrology, University Vita-Salute San Raffaele, Via Olgettina 58, 20132 Milano, Italy
| | - Daniele Cusi
- Institute of Biomedical Technologies, National Research Centre (ITB-CNR), Via Fratelli Cervi 93, 20090 Segrate-Milano, Italy
| | - Christian Gieger
- Institute of Epidemiology, Helmholtz Center Munich, Ingolstädter Landstr. 1, 85764 Munich, Germany
| | - Heinz-Erich Wichmann
- Institute of Epidemiology, Helmholtz Center Munich, Ingolstädter Landstr. 1, 85764 Munich, Germany
| | - Tin Aung
- Singapore Eye Research Institute, Singapore National Eye Center, 11 Third Hospital Avenue, Singapore 168751, Singapore
| | | | - Friedrich E Kruse
- Department of Ophthalmology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schwabachanlage 6, 91054 Erlangen, Germany
| | - André Reis
- Institute of Human Genetics, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schwabachanlage 10, 91054 Erlangen, Germany
| | - Ursula Schlötzer-Schrehardt
- Department of Ophthalmology, Universitätsklinikum Erlangen, Friedrich-Alexander-Universität Erlangen-Nürnberg, Schwabachanlage 6, 91054 Erlangen, Germany
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175
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Ahmed T, Nash A, Clark KE, Ghibaudo M, de Leeuw NH, Potter A, Stratton R, Birch HL, Enea Casse R, Bozec L. Combining nano-physical and computational investigations to understand the nature of "aging" in dermal collagen. Int J Nanomedicine 2017; 12:3303-3314. [PMID: 28461747 PMCID: PMC5407446 DOI: 10.2147/ijn.s121400] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
The extracellular matrix of the dermis is a complex, dynamic system with the various dermal components undergoing individual physiologic changes as we age. Age-related changes in the physical properties of collagen were investigated in particular by measuring the effect of aging, most likely due to the accumulation of advanced glycation end product (AGE) cross-links, on the nanomechanical properties of the collagen fibril using atomic force microscope nano-indentation. An age-related decrease in the Young’s modulus of the transverse fibril was observed (from 8.11 to 4.19 GPa in young to old volunteers, respectively, P<0.001). It is proposed that this is due to a change in the fibril density caused by age-related differences in water retention within the fibrils. The new collagen–water interaction mechanism was verified by electronic structure calculations, showing it to be energetically feasible.
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Affiliation(s)
- Tarek Ahmed
- Division of Biomaterials and Tissue Engineering, Eastman Dental Institute, University College London
| | - Anthony Nash
- Department of Chemistry, University College London
| | - Kristina En Clark
- Centre for Rheumatology and Connective Tissue Diseases, Division of Medicine, University College London, London, UK
| | | | | | - Anne Potter
- L'Oréal Research and Innovation, Aulnay-sous-Bois, France
| | - Richard Stratton
- Centre for Rheumatology and Connective Tissue Diseases, Division of Medicine, University College London, London, UK
| | - Helen L Birch
- Division of Surgery and Interventional Science, UCL Institute of Orthopaedics and Musculoskeletal Science, University College London, London, UK
| | | | - Laurent Bozec
- Division of Biomaterials and Tissue Engineering, Eastman Dental Institute, University College London
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176
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Hutchinson JH, Rowbottom MW, Lonergan D, Darlington J, Prodanovich P, King CD, Evans JF, Bain G. Small Molecule Lysyl Oxidase-like 2 (LOXL2) Inhibitors: The Identification of an Inhibitor Selective for LOXL2 over LOX. ACS Med Chem Lett 2017; 8:423-427. [PMID: 28435530 DOI: 10.1021/acsmedchemlett.7b00014] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 03/01/2017] [Indexed: 11/28/2022] Open
Abstract
Two series of novel LOXL2 enzyme inhibitors are described: benzylamines substituted with electron withdrawing groups at the para-position and 2-substituted pyridine-4-ylmethanamines. The most potent compound, (2-chloropyridin-4-yl)methanamine 20 (hLOXL2 IC50 = 126 nM), was shown to be selective for LOXL2 over LOX and three other amine oxidases (MAO-A, MAO-B, and SSAO). Compound 20 is the first published small molecule inhibitor selective for LOXL2 over LOX.
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Affiliation(s)
- John H. Hutchinson
- PharmAkea Inc., 3030 Bunker Hill Street, Suite 300, San Diego, California 92109, United States
| | - Martin W. Rowbottom
- PharmAkea Inc., 3030 Bunker Hill Street, Suite 300, San Diego, California 92109, United States
| | - David Lonergan
- PharmAkea Inc., 3030 Bunker Hill Street, Suite 300, San Diego, California 92109, United States
| | - Janice Darlington
- PharmAkea Inc., 3030 Bunker Hill Street, Suite 300, San Diego, California 92109, United States
| | - Pat Prodanovich
- PharmAkea Inc., 3030 Bunker Hill Street, Suite 300, San Diego, California 92109, United States
| | - Christopher D. King
- PharmAkea Inc., 3030 Bunker Hill Street, Suite 300, San Diego, California 92109, United States
| | - Jilly F. Evans
- PharmAkea Inc., 3030 Bunker Hill Street, Suite 300, San Diego, California 92109, United States
| | - Gretchen Bain
- PharmAkea Inc., 3030 Bunker Hill Street, Suite 300, San Diego, California 92109, United States
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177
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Purushothaman KR, Purushothaman M, Turnbull IC, Adams DH, Anyanwu A, Krishnan P, Kini A, Sharma SK, O'Connor WN, Moreno PR. Association of altered collagen content and lysyl oxidase expression in degenerative mitral valve disease. Cardiovasc Pathol 2017; 29:11-18. [PMID: 28453968 DOI: 10.1016/j.carpath.2017.04.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2016] [Revised: 02/28/2017] [Accepted: 04/07/2017] [Indexed: 02/08/2023] Open
Abstract
BACKGROUND Collagen cross-linking is mediated by lysyl oxidase (LOX) enzyme in the extracellular matrix (ECM) of mitral valve leaflets. Alterations in collagen content and LOX protein expression in the ECM of degenerative mitral valve may enhance leaflet expansion and disease severity. METHODS Twenty posterior degenerative mitral valve leaflets from patients with severe mitral regurgitation were obtained at surgery. Five normal posterior mitral valve leaflets procured during autopsy served as controls. Valvular interstitial cells (VICs) density was quantified by immunohistochemistry, collagen Types I and III by picro-sirius red staining and immunohistochemistry, and proteoglycans by alcian blue staining. Protein expression of LOX and its mediator TGFβ1 were quantified by immunofluorescence and gene expression by PCR. RESULTS VIC density was increased, structural Type I collagen density was reduced, while reparative Type III collagen and proteoglycan densities were increased (P<.0001) with an increase in spongiosa layer thickness in myxomatous valves. These changes were associated with a reduction in LOX (P<.0001) and increase in TGFβ1 protein expression (P<.0001). However, no significant change was seen in gene expression. Linear regression analysis identified a correlation between Type I collagen density and LOX grade (R2=0.855; P<.0001). CONCLUSIONS Reduced Type I collagen density with a simultaneous increase in Type III collagen and proteoglycan densities possibly contributes to spongiosa layer expansion resulting in incompetent mitral valve leaflets. Observed changes in Type I and III collagen densities in Degenerative Mitral Valve Disease may be secondary to alterations in LOX protein expression, contributing to disorganization of ECM and disease severity.
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Affiliation(s)
- K-Raman Purushothaman
- The Zena and Michael A. Weiner Cardiovascular Institute and the Marie-Josée and Henry R. Kravis Cardiovascular Health Center, Department of Medicine.
| | - Meerarani Purushothaman
- The Zena and Michael A. Weiner Cardiovascular Institute and the Marie-Josée and Henry R. Kravis Cardiovascular Health Center, Department of Medicine
| | - Irene C Turnbull
- The Zena and Michael A. Weiner Cardiovascular Institute and the Marie-Josée and Henry R. Kravis Cardiovascular Health Center, Department of Medicine
| | - David H Adams
- Department of Cardiovascular Surgery, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Anelechi Anyanwu
- Department of Cardiovascular Surgery, Icahn School of Medicine at Mount Sinai, New York, NY
| | - Prakash Krishnan
- The Zena and Michael A. Weiner Cardiovascular Institute and the Marie-Josée and Henry R. Kravis Cardiovascular Health Center, Department of Medicine
| | - Annapoorna Kini
- The Zena and Michael A. Weiner Cardiovascular Institute and the Marie-Josée and Henry R. Kravis Cardiovascular Health Center, Department of Medicine
| | - Samin K Sharma
- The Zena and Michael A. Weiner Cardiovascular Institute and the Marie-Josée and Henry R. Kravis Cardiovascular Health Center, Department of Medicine
| | - William N O'Connor
- Department of Pathology and Laboratory Medicine, University of Kentucky, Lexington, KY, USA
| | - Pedro R Moreno
- The Zena and Michael A. Weiner Cardiovascular Institute and the Marie-Josée and Henry R. Kravis Cardiovascular Health Center, Department of Medicine
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178
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Tokhmafshan F, Brophy PD, Gbadegesin RA, Gupta IR. Vesicoureteral reflux and the extracellular matrix connection. Pediatr Nephrol 2017; 32:565-576. [PMID: 27139901 PMCID: PMC5376290 DOI: 10.1007/s00467-016-3386-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Revised: 03/18/2016] [Accepted: 03/21/2016] [Indexed: 12/24/2022]
Abstract
Primary vesicoureteral reflux (VUR) is a common pediatric condition due to a developmental defect in the ureterovesical junction. The prevalence of VUR among individuals with connective tissue disorders, as well as the importance of the ureter and bladder wall musculature for the anti-reflux mechanism, suggest that defects in the extracellular matrix (ECM) within the ureterovesical junction may result in VUR. This review will discuss the function of the smooth muscle and its supporting ECM microenvironment with respect to VUR, and explore the association of VUR with mutations in ECM-related genes.
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Affiliation(s)
| | - Patrick D. Brophy
- Department of Pediatrics, University of Iowa, Carver College of Medicine, Iowa City, IA 52242, USA
| | - Rasheed A. Gbadegesin
- Department of Pediatrics, Division of Nephrology, Duke University Medical Center, Durham, NC 27710, USA,Center for Human Genetics, Duke University Medical Center, Durham, NC 27710, USA
| | - Indra R. Gupta
- Department of Human Genetics, McGill University, Montreal, QC, Canada,Department of Pediatrics, McGill University, Montreal, QC, Canada
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179
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Cai L, Xiong X, Kong X, Xie J. The Role of the Lysyl Oxidases in Tissue Repair and Remodeling: A Concise Review. Tissue Eng Regen Med 2017; 14:15-30. [PMID: 30603458 DOI: 10.1007/s13770-016-0007-0] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2016] [Revised: 04/01/2016] [Accepted: 04/17/2016] [Indexed: 02/05/2023] Open
Abstract
Tissue injury provokes a series of events containing inflammation, new tissue formation and tissue remodeling which are regulated by the spatially and temporally coordinated organization. It is an evolutionarily conserved, multi-cellular, multi-molecular process via complex signalling network. Tissue injury disorders present grievous clinical problems and are likely to increase since they are generally associated with the prevailing diseases such as diabetes, hypertension and obesity. Although these dynamic responses vary not only for the different types of trauma but also for the different organs, a balancing act between the tissue degradation and tissue synthesis is the same. In this process, the degradation of old extracellular matrix (ECM) elements and new ones' synthesis and deposition play an essential role, especially collagens. Lysyl oxidase (LOX) and four lysyl oxidase-like proteins are a group of enzymes capable of catalyzing cross-linking reaction of collagen and elastin, thus initiating the formation of covalent cross-links that insolubilize ECM proteins. In this way, LOX facilitates ECM stabilization through ECM formation, development, maturation and remodeling. This ability determines its potential role in tissue repair and regeneration. In this review, based on the current in vitro, animal and human in vivo studies which have shown the significant role of the LOXs in tissue repair, e.g., tendon regeneration, ligament healing, cutaneous wound healing, and cartilage remodeling, we focused on the role of the LOXs in inflammation phase, proliferation phase, and tissue remodeling phase of the repair process. By summarizing its healing role, we hope to shed light on the understanding of its potential in tissue repair and provide up to date therapeutic strategies towards related injuries.
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Affiliation(s)
- Linyi Cai
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041 People's Republic of China
| | - Xin Xiong
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041 People's Republic of China
| | - Xiangli Kong
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041 People's Republic of China
| | - Jing Xie
- State Key Laboratory of Oral Diseases, West China Hospital of Stomatology, Sichuan University, Chengdu, 610041 People's Republic of China
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180
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Nailfold capillary morphology in exfoliation syndrome. Eye (Lond) 2017; 31:698-707. [PMID: 28085140 DOI: 10.1038/eye.2016.312] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Accepted: 11/26/2016] [Indexed: 02/08/2023] Open
Abstract
PurposeThe purpose of the study was to investigate nailfold microvascular morphology in exfoliation syndrome with or without glaucoma (XFS/XFG) compared with primary open-angle glaucoma (POAG) and control subjects using nailfold capillary videomicroscopy.Patients and methodsWe used a JH-1004 capillaroscope to perform nailfold capillary videomicroscopy on the fourth and fifth digit of the non-dominant hand. We enrolled 56 XFS/XFG patients, 87 POAG patients, and 75 control subjects. Masked observers graded the videos for hemorrhages, avascular zones ≥200 microns (μm), and degree of microvascular tortuosity on a four-point subjective scale. Multivariable odds ratios, 95% confidence intervals and P-for trends for assessing the relation between morphological changes and POAG or XFS/XFG were obtained from logistic regression analyses. We also assessed this relation with XFS/XFG compared with POAG in multivariable models.ResultsAfter adjusting for multiple covariates, nailfold hemorrhages, avascular zones ≥200 μm, and higher degree of vascular tortuosity were more common in XFS/XFG vs controls (P-for trend ≤0.0001) and in POAG vs controls (P-for trend ≤0.01). For each 100 capillaries, the number of hemorrhages was similar (P-for trend=0.91) between XFS/XFG and POAG patients; however, there were more avascular zones per 100 capillaries with borderline significance (P-for trend=0.04) in the XFS/XFG group. XFS/XFG patients had more tortuosity than POAG patients; specifically, having a tortuosity score ≥1.5 was associated with a 4.4-fold increased odds of XFS/XFG (95% confidence interval: 1.5-13.3) relative to a tortuosity score <1.0 (P-for trend=0.005).ConclusionA high degree of nailfold capillary tortuosity is a distinct non-ocular feature associated with XFS/XFG compared with either POAG or controls.
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181
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Sato F, Seino-Sudo R, Okada M, Sakai H, Yumoto T, Wachi H. Lysyl Oxidase Enhances the Deposition of Tropoelastin through the Catalysis of Tropoelastin Molecules on the Cell Surface. Biol Pharm Bull 2017; 40:1646-1653. [DOI: 10.1248/bpb.b17-00027] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Fumiaki Sato
- Department of Analytical Pathophysiology, Hoshi University School of Pharmacy and Pharmaceutical Sciences
| | - Ryo Seino-Sudo
- Department of Tissue Regeneration, Hoshi University School of Pharmacy and Pharmaceutical Sciences
| | - Mami Okada
- Department of Clinical Chemistry, Hoshi University School of Pharmacy and Pharmaceutical Sciences
| | - Hiroyasu Sakai
- Department of Analytical Pathophysiology, Hoshi University School of Pharmacy and Pharmaceutical Sciences
| | - Tetsuro Yumoto
- Department of Analytical Pathophysiology, Hoshi University School of Pharmacy and Pharmaceutical Sciences
| | - Hiroshi Wachi
- Department of Tissue Regeneration, Hoshi University School of Pharmacy and Pharmaceutical Sciences
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182
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Rodriguez-Pascual F, Slatter DA. Collagen cross-linking: insights on the evolution of metazoan extracellular matrix. Sci Rep 2016; 6:37374. [PMID: 27876853 PMCID: PMC5120351 DOI: 10.1038/srep37374] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Accepted: 10/28/2016] [Indexed: 12/15/2022] Open
Abstract
Collagens constitute a large family of extracellular matrix (ECM) proteins that play a fundamental role in supporting the structure of various tissues in multicellular animals. The mechanical strength of fibrillar collagens is highly dependent on the formation of covalent cross-links between individual fibrils, a process initiated by the enzymatic action of members of the lysyl oxidase (LOX) family. Fibrillar collagens are present in a wide variety of animals, therefore often being associated with metazoan evolution, where the emergence of an ancestral collagen chain has been proposed to lead to the formation of different clades. While LOX-generated collagen cross-linking metabolites have been detected in different metazoan families, there is limited information about when and how collagen acquired this particular modification. By analyzing telopeptide and helical sequences, we identified highly conserved, potential cross-linking sites throughout the metazoan tree of life. Based on this analysis, we propose that they have importantly contributed to the formation and further expansion of fibrillar collagens.
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Affiliation(s)
- Fernando Rodriguez-Pascual
- Centro de Biología Molecular “Severo Ochoa” Consejo Superior de Investigaciones Científicas (C.S.I.C.)/Universidad Autónoma de Madrid (Madrid), Madrid, Spain
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183
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Weihermann AC, Lorencini M, Brohem CA, de Carvalho CM. Elastin structure and its involvement in skin photoageing. Int J Cosmet Sci 2016; 39:241-247. [PMID: 27731897 DOI: 10.1111/ics.12372] [Citation(s) in RCA: 85] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 10/08/2016] [Indexed: 12/20/2022]
Abstract
Skin aging is a complex process that may be caused by factors that are intrinsic and extrinsic to the body. Ultraviolet (UV) radiation represents one of the main sources of skin damage over the years and characterizes a process known as photoaging. Among the changes that affect cutaneous tissue with age, the loss of elastic properties caused by changes in elastin production, increased degradation and/or processing produces a substantial impact on tissue esthetics and health. The occurrence of solar elastosis is one of the main markers of cutaneous photoaging and is characterized by disorganized and non-functional deposition of elastic fibers. The occurrence of UV radiation-induced alternative splicing of the elastin gene, which leads to inadequate synthesis of the proteins required for the correct assembly of elastic fibers, is a potential explanation for this phenomenon. Innovative studies have been fundamental for the elucidation of rarely explored photoaging mechanisms and have enabled the identification of effective therapeutic alternatives such as cosmetic products. This review addresses cutaneous photoaging and the changes that affect elastin in this process.
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Affiliation(s)
- A C Weihermann
- Department of Research and Development, Grupo Boticário, Rua Alfredo Pinto, 1500, São José dos Pinhais, 83065-150, PR, Brazil.,Department of Industrial Biotechnology, Universidade Positivo, Rua Prof. Pedro Viriato Parigot de Souza, 5300, Curitiba, 81280-330, PR, Brazil
| | - M Lorencini
- Department of Research and Development, Grupo Boticário, Rua Alfredo Pinto, 1500, São José dos Pinhais, 83065-150, PR, Brazil
| | - C A Brohem
- Department of Research and Development, Grupo Boticário, Rua Alfredo Pinto, 1500, São José dos Pinhais, 83065-150, PR, Brazil
| | - C M de Carvalho
- Department of Research and Development, Grupo Boticário, Rua Alfredo Pinto, 1500, São José dos Pinhais, 83065-150, PR, Brazil.,Department of Industrial Biotechnology, Universidade Positivo, Rua Prof. Pedro Viriato Parigot de Souza, 5300, Curitiba, 81280-330, PR, Brazil
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184
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Aboobakar IF, Johnson WM, Stamer WD, Hauser MA, Allingham RR. Major review: Exfoliation syndrome; advances in disease genetics, molecular biology, and epidemiology. Exp Eye Res 2016; 154:88-103. [PMID: 27845061 DOI: 10.1016/j.exer.2016.11.011] [Citation(s) in RCA: 82] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Revised: 10/06/2016] [Accepted: 11/10/2016] [Indexed: 12/20/2022]
Abstract
Exfoliation syndrome (XFS) is a common age-related disorder that leads to deposition of extracellular fibrillar material throughout the body. The most recognized disease manifestation is exfoliation glaucoma (XFG), which is a common cause of blindness worldwide. Recent developments in XFS genetics, cell biology and epidemiology have greatly improved our understanding of the etiology of this complex inherited disease. This review summarizes current knowledge of XFS pathogenesis, identifies gaps in knowledge, and discusses areas for future research.
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Affiliation(s)
- Inas F Aboobakar
- Department of Ophthalmology, Duke University Medical Center, Durham, NC, USA
| | - William M Johnson
- Department of Ophthalmology, Duke University Medical Center, Durham, NC, USA
| | - W Daniel Stamer
- Department of Ophthalmology, Duke University Medical Center, Durham, NC, USA
| | - Michael A Hauser
- Department of Ophthalmology, Duke University Medical Center, Durham, NC, USA
| | - R Rand Allingham
- Department of Ophthalmology, Duke University Medical Center, Durham, NC, USA.
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185
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Abstract
A characteristic feature of liver cirrhosis is the accumulation of large amounts of connective tissue with the prevailing content of type I collagen. Elastin is a minor connective tissue component in normal liver but it is actively synthesized by hepatic stellate cells and portal fibroblasts in diseased liver. The accumulation of elastic fibers in later stages of liver fibrosis may contribute to the decreasing reversibility of the disease with advancing time. Elastin is formed by polymerization of tropoelastin monomers. It is an amorphous protein highly resistant to the action of proteases that forms the core of elastic fibers. Microfibrils surrounding the core are composed of fibrillins that bind a number of proteins involved in fiber formation. They include microfibril-associated glycoproteins (MAGPs), microfibrillar-associated proteins (MFAPs) and fibulins. Lysyl oxidase (LOX) and lysyl oxidase-like proteins (LOXLs) are responsible for tropoelastin cross-linking and polymerization. TGF-β complexes attached to microfibrils release this cytokine and influence the behavior of the cells in the neighborhood. The role of TGF-β as the main profibrotic cytokine in the liver is well-known and the release of the cytokines of TGF-β superfamily from their storage in elastic fibers may affect the course of fibrosis. Elastic fibers are often studied in the tissues where they provide elasticity and resilience but their role is no longer viewed as purely mechanical. Tropoelastin, elastin polymer and elastin peptides resulting from partial elastin degradation influence fibroblastic and inflammatory cells as well as angiogenesis. A similar role may be performed by elastin in the liver. This article reviews the results of the research of liver elastic fibers on the background of the present knowledge of elastin biochemistry and physiology. The regulation of liver elastin synthesis and degradation may be important for the outcome of liver fibrosis.
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Affiliation(s)
- Jiří Kanta
- Department of Medical Biochemistry, Faculty of Medicine in Hradec Kralove, Charles University in Prague Hradec Kralove, Czechia
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186
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Rouzaire M, Comptour A, Belville C, Bouvier D, Clairefond G, Ponelle F, Sapin V, Gallot D, Blanchon L. All-trans retinoic acid promotes wound healing of primary amniocytes through the induction of LOXL4, a member of the lysyl oxidase family. Int J Biochem Cell Biol 2016; 81:10-19. [PMID: 27769742 DOI: 10.1016/j.biocel.2016.10.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2016] [Revised: 07/23/2016] [Accepted: 10/07/2016] [Indexed: 01/19/2023]
Abstract
Thirty percent of preterm births directly result from preterm premature rupture of fetal membranes (PPROM). Clinical management currently proposes using a collagen plug to mechanically stop loss of amniotic fluid. Vitamin A and its active metabolite (retinoic acid) have well-known pro-healing properties and could thus make good candidates as a proposable adjuvant to this mechanical approach. Here we investigate the molecular mechanisms involved in the pro-healing properties of all-trans retinoic acid (atRA) in fetal membranes via an approach using an in vitro primary amniocyte wound model and transcriptomics. The results demonstrate that atRA promotes migration in primary amniocytes, improving wound healing in vitro by up to 90%. This effect is mediated by the induction of LOXL4, which plays a crucial role in the dynamics of the extracellular matrix by regulating collagen reticulation. This new insight into how atRA exerts its pro-healing properties prompts us to propose using atRA as a candidate strategy to help prevent future PPROM.
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Affiliation(s)
- Marion Rouzaire
- Clermont Université, Auvergne University, EA7281- Retinoids, Reproduction, Developmental Diseases, Medicine School, 63000 Clermont-Ferrand, France
| | - Aurélie Comptour
- Clermont Université, Auvergne University, EA7281- Retinoids, Reproduction, Developmental Diseases, Medicine School, 63000 Clermont-Ferrand, France
| | - Corinne Belville
- Clermont Université, Auvergne University, EA7281- Retinoids, Reproduction, Developmental Diseases, Medicine School, 63000 Clermont-Ferrand, France; Clermont Université, Auvergne University, GReD, 63000 Clermont-Ferrand, France
| | - Damien Bouvier
- Clermont Université, Auvergne University, EA7281- Retinoids, Reproduction, Developmental Diseases, Medicine School, 63000 Clermont-Ferrand, France; CHU Clermont-Ferrand, Biochemistry and Molecular Biology Department, 63000 Clermont-Ferrand, France
| | - Gaël Clairefond
- Clermont Université, Auvergne University, EA7281- Retinoids, Reproduction, Developmental Diseases, Medicine School, 63000 Clermont-Ferrand, France
| | - Flora Ponelle
- Clermont Université, Auvergne University, EA7281- Retinoids, Reproduction, Developmental Diseases, Medicine School, 63000 Clermont-Ferrand, France
| | - Vincent Sapin
- Clermont Université, Auvergne University, EA7281- Retinoids, Reproduction, Developmental Diseases, Medicine School, 63000 Clermont-Ferrand, France; CHU Clermont-Ferrand, Biochemistry and Molecular Biology Department, 63000 Clermont-Ferrand, France.
| | - Denis Gallot
- Clermont Université, Auvergne University, EA7281- Retinoids, Reproduction, Developmental Diseases, Medicine School, 63000 Clermont-Ferrand, France; CHU Clermont-Ferrand, Obstetrics and Gynecology Department, 63000 Clermont-Ferrand, France
| | - Loïc Blanchon
- Clermont Université, Auvergne University, EA7281- Retinoids, Reproduction, Developmental Diseases, Medicine School, 63000 Clermont-Ferrand, France
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187
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Zhang J, Liu Z, Zhang T, Lin Z, Li Z, Zhang A, Sun X, Gao J. Loss of Lysyl Oxidase-like 3 Attenuates Embryonic Lung Development in Mice. Sci Rep 2016; 6:33856. [PMID: 27645581 PMCID: PMC5029289 DOI: 10.1038/srep33856] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2016] [Accepted: 09/05/2016] [Indexed: 12/31/2022] Open
Abstract
Lysyl oxidase-like 3 (LOXL3), a human disease gene candidate, is a member of the lysyl oxidase (LOX) family and is indispensable for mouse palatogenesis and vertebral column development. Our previous study showed that the loss of LOXL3 resulted in a severe cleft palate and spinal deformity. In this study, we investigated a possible role for LOXL3 in mouse embryonic lung development. LOXL3-deficient mice displayed reduced lung volumes and weights, diminished saccular spaces, and deformed and smaller thoracic cavities. Excess elastic fibres were detected in LOXL3-deficient lungs, which might be related to the increased LOXL4 expression. Increased transforming growth factor β1 (TGFβ1) expression might be involved in the up-regulation of LOXL4 in LOXL3-deficient lungs. We concluded that the loss of LOXL3 attenuates mouse embryonic lung development.
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Affiliation(s)
- Jian Zhang
- School of Life Science and Key Laboratory of the Ministry of Education for Experimental Teratology, Shandong University, Jinan 250100, China
| | - Ziyi Liu
- School of Life Science and Key Laboratory of the Ministry of Education for Experimental Teratology, Shandong University, Jinan 250100, China
| | - Tingting Zhang
- School of Life Science and Key Laboratory of the Ministry of Education for Experimental Teratology, Shandong University, Jinan 250100, China
| | - Zhuchun Lin
- Jinan First People's Hospital, Jinan 250011, China
| | - Zhenzu Li
- School of Life Science and Key Laboratory of the Ministry of Education for Experimental Teratology, Shandong University, Jinan 250100, China
| | - Aizhen Zhang
- School of Life Science and Key Laboratory of the Ministry of Education for Experimental Teratology, Shandong University, Jinan 250100, China
| | - Xiaoyang Sun
- School of Life Science and Key Laboratory of the Ministry of Education for Experimental Teratology, Shandong University, Jinan 250100, China
| | - Jiangang Gao
- School of Life Science and Key Laboratory of the Ministry of Education for Experimental Teratology, Shandong University, Jinan 250100, China
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188
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Zheng W, Wang X, Chen Q, Fang K, Wang L, Chen F, Li X, Li Z, Wang J, Liu Y, Yang D, Song X. Low extracellular lysyl oxidase expression is associated with poor prognosis in patients with prostate cancer. Oncol Lett 2016; 12:3161-3166. [PMID: 27899976 PMCID: PMC5103911 DOI: 10.3892/ol.2016.5118] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2015] [Accepted: 07/22/2016] [Indexed: 01/07/2023] Open
Abstract
Remodeling of the extracellular matrix (ECM), which is induced by lysyl oxidase (LOX), has been demonstrated to accompany tumor progression; however, the association between LOX expression levels and the malignant behavior of prostate cancer (Pca) remains unclear. The present study aimed to analyze the tumor-associated expression profile of LOX in patients with Pca and to evaluate its potential prognostic value. In the form of a retrospective study, the expression patterns of LOX and collagen I were analyzed in patients with benign prostate hyperplasia and Pca by immunohistochemical examination. The results demonstrated that, with the initiation and progression of Pca, the expression levels of LOX and collagen I were closely associated with Gleason score and tumor stage. In addition, although LOX was expressed in cancer and non-cancer tissues, the differential expression pattern observed in the ECM of Pca cells may indicate that LOX is an important molecule that affects the progression of this disease. Therefore, LOX expression level in the ECM may function as an independent predictor of Pca.
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Affiliation(s)
- Wei Zheng
- Department of Urology, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
| | - Xuejian Wang
- Department of Urology, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
| | - Qiwei Chen
- Department of Urology, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
| | - Kun Fang
- Department of Urology, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
| | - Lina Wang
- Department of Urology, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
| | - Feng Chen
- Department of Urology, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
| | - Xiancheng Li
- Department of Urology, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
| | - Ziyao Li
- Department of Urology, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
| | - Jianbo Wang
- Department of Urology, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
| | - Yingxi Liu
- Department of Biomedical Engineering, Dalian University of Technology, Dalian, Liaoning 116024, P.R. China
| | - Deyong Yang
- Department of Urology, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China; Department of Biomedical Engineering, Dalian University of Technology, Dalian, Liaoning 116024, P.R. China
| | - Xishuang Song
- Department of Urology, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116011, P.R. China
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189
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Añazco C, Delgado-López F, Araya P, González I, Morales E, Pérez-Castro R, Romero J, Rojas A. Lysyl oxidase isoforms in gastric cancer. Biomark Med 2016; 10:987-98. [PMID: 27564724 DOI: 10.2217/bmm-2016-0075] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Gastric cancer (GC) is the fifth most frequent cancer in the world and shows the highest incidence in Latin America and Asia. An increasing amount of evidence demonstrates that lysyl oxidase isoforms, a group of extracellular matrix crosslinking enzymes, should be considered as potential biomarkers and therapeutic targets in GC. In this review, we focus on the expression levels of lysyl oxidase isoforms, its functions and the clinical implications in GC. Finding novel proteins related to the processing of these extracellular matrix enzymes might be helpful in the design of new therapies, which, in combination with classic pharmacology, could be used to delay the progress of this aggressive cancer and offer a wider temporal window for clinical intervention.
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Affiliation(s)
- Carolina Añazco
- Biomedical Research Labs, Medicine Faculty, Catholic University of Maule, Talca, Chile
| | | | - Paulina Araya
- Biomedical Research Labs, Medicine Faculty, Catholic University of Maule, Talca, Chile
| | - Ileana González
- Biomedical Research Labs, Medicine Faculty, Catholic University of Maule, Talca, Chile
| | - Erik Morales
- Biomedical Research Labs, Medicine Faculty, Catholic University of Maule, Talca, Chile
- Pathology Department, Regional Hospital of Talca, Talca, Chile
| | - Ramón Pérez-Castro
- Biomedical Research Labs, Medicine Faculty, Catholic University of Maule, Talca, Chile
| | - Jacqueline Romero
- Biomedical Research Labs, Medicine Faculty, Catholic University of Maule, Talca, Chile
| | - Armando Rojas
- Biomedical Research Labs, Medicine Faculty, Catholic University of Maule, Talca, Chile
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190
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Karin D, Koyama Y, Brenner D, Kisseleva T. The characteristics of activated portal fibroblasts/myofibroblasts in liver fibrosis. Differentiation 2016; 92:84-92. [PMID: 27591095 PMCID: PMC5079826 DOI: 10.1016/j.diff.2016.07.001] [Citation(s) in RCA: 91] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 06/08/2016] [Accepted: 07/11/2016] [Indexed: 12/12/2022]
Abstract
Liver fibrosis results from chronic injury of hepatocytes and activation of Collagen Type I producing myofibroblasts that produce fibrous scar in liver fibrosis. Myofibroblasts are not present in the normal liver but rapidly appear early in experimental and clinical liver injury. The origin of the myofibroblast in liver fibrosis is still unresolved. The possibilities include activation of liver resident cells including portal fibroblasts, hepatic stellate cells, mesenchymal progenitor cells, and fibrocytes recruited from the bone marrow. It is considered that hepatic stellate cells and portal fibroblasts are the major source of hepatic myofibroblasts. In fact, the origin of myofibroblasts differs significantly for chronic liver diseases of different etiologies, such as cholestatic liver disease or hepatotoxic liver disease. Depending on etiology of hepatic injury, the fibrogenic foci might initiate within the hepatic lobule as seen in chronic hepatitis, or primarily affect the portal areas as in most biliary diseases. It has been suggested that activated portal fibroblasts/myofibroblasts work as "myofibroblasts for cholangiocytes" while hepatic stellate cells work as "myofibroblast for hepatocytes". This review will focus on our current understanding of the activated portal fibroblasts/myofibroblasts in cholestatic liver fibrosis.
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Affiliation(s)
- Daniel Karin
- Department of Surgery, University of California, San Diego, La Jolla CA 92093, USA; Department of Medicine, University of California, San Diego, La Jolla CA 92093, USA; Department of Pediatrics, University of California, San Diego, La Jolla CA 92093, USA
| | - Yukinori Koyama
- Department of Surgery, University of California, San Diego, La Jolla CA 92093, USA; Department of Medicine, University of California, San Diego, La Jolla CA 92093, USA; Department of Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan; Department of Pediatrics, University of California, San Diego, La Jolla CA 92093, USA
| | - David Brenner
- Department of Medicine, University of California, San Diego, La Jolla CA 92093, USA; Department of Pediatrics, University of California, San Diego, La Jolla CA 92093, USA
| | - Tatiana Kisseleva
- Department of Surgery, University of California, San Diego, La Jolla CA 92093, USA; Department of Pediatrics, University of California, San Diego, La Jolla CA 92093, USA.
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191
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Gambichler T, Skrygan M, Reininghaus L, Schulze HJ, Schaller J, Hessam S, Colato C, Girolomoni G, Heitzer E. Lysyl oxidase-like 2 promoter hypermethylation in mid-dermal elastolysis. Br J Dermatol 2016; 175:1354-1356. [DOI: 10.1111/bjd.14666] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- T. Gambichler
- Department of Dermatology; Ruhr-University Bochum; Bochum Germany
| | - M. Skrygan
- Department of Dermatology; Ruhr-University Bochum; Bochum Germany
| | - L. Reininghaus
- Department of Dermatology; Ruhr-University Bochum; Bochum Germany
| | - H.-J. Schulze
- Fachklinik Hornheide; Skin Cancer Centre; Department of Dermatology and Dermato-Histo-Pathology; Münster Germany
| | | | - S. Hessam
- Department of Dermatology; Ruhr-University Bochum; Bochum Germany
| | - C. Colato
- Section of Pathology; Department of Pathology and Diagnostics; University of Verona; Verona Italy
| | - G. Girolomoni
- Section of Dermatology and Venereology; Department of Medicine; University of Verona; Verona Italy
| | - E. Heitzer
- Institute of Human Genetics; Medical University of Graz; Graz Austria
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192
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Moulin L, Cenizo V, Antu AN, André V, Pain S, Sommer P, Debret R. Methylation of LOXL1 Promoter by DNMT3A in Aged Human Skin Fibroblasts. Rejuvenation Res 2016; 20:103-110. [PMID: 27396912 DOI: 10.1089/rej.2016.1832] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Lysyl oxidase-like 1 (LOXL1) is an amino-oxidase involved in maturation of elastic fibers. Its downregulation has been associated with elastic fibers repair loss in aging aorta, lung, ligament, and skin. Several evidences of LOXL1 epigenetic silencing by promoter methylation were reported in cancer and cutis laxa syndrome. We hypothesized that this mechanism could be implicated in skin aging process, as far as elastic fibers are also concerned. Anti-DNMT3A chromatin immunoprecipitation was conducted with nuclear extracts from skin fibroblasts isolated from young and elderly individuals, and showed a higher level of DNMT3A protein binding to the LOXL1 promoter in older cells concomitantly to the decrease of LOXL1 mRNA expression and the increase of LOXL1 promoter methylation. Using luciferase reporter assay driven by LOXL1 promoter in HEK293 cells, we demonstrated that LOXL1 transcriptional activity was dramatically reduced when a recombinant DNMT3A was concomitantly overexpressed. LOXL1 promoter transcriptional activity was restored in the presence of a broad-spectrum inhibitor of DNMT activity, 5-aza-2'-deoxycytidine. Finally, to assess whether the interplay between DNMT3A and LOXL1 promoter could be targeted to increase LOXL1 mRNA expression level, an Origanum majorana extract was selected among 43 plant extracts as a new inhibitor of human DNMT3A activity to restore LOXL1 secretion without cytotoxicity in aged skin fibroblasts.
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Affiliation(s)
- Léa Moulin
- 1 Laboratory of Tissue Biology and Therapeutic Engineering, UMR5305, CNRS, University Claude Bernard , Lyon, France
| | | | - Alengo Nyamay Antu
- 1 Laboratory of Tissue Biology and Therapeutic Engineering, UMR5305, CNRS, University Claude Bernard , Lyon, France
| | - Valérie André
- 2 BASF-Beauty Care Solutions France SAS , Lyon, France
| | - Sabine Pain
- 2 BASF-Beauty Care Solutions France SAS , Lyon, France
| | - Pascal Sommer
- 1 Laboratory of Tissue Biology and Therapeutic Engineering, UMR5305, CNRS, University Claude Bernard , Lyon, France
| | - Romain Debret
- 1 Laboratory of Tissue Biology and Therapeutic Engineering, UMR5305, CNRS, University Claude Bernard , Lyon, France
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Zong W, Jiang Y, Zhao J, Zhang J, Gao JG. Estradiol plays a role in regulating the expression of lysyl oxidase family genes in mouse urogenital tissues and human Ishikawa cells. J Zhejiang Univ Sci B 2016; 16:857-64. [PMID: 26465133 DOI: 10.1631/jzus.b1500048] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The lysyl oxidase (LOX) family encodes the copper-dependent amine oxidases that play a key role in determining the tensile strength and structural integrity of connective tissues by catalyzing the crosslinking of elastin or collagen. Estrogen may upregulate the expression of LOX and lysyl oxidase-like 1 (LOXL1) in the vagina. The objective of this study was to determine the effect of estrogen on the expression of all LOX family genes in the urogenital tissues of accelerated ovarian aging mice and human Ishikawa cells. Mice and Ishikawa cells treated with estradiol (E2) showed increased expression of LOX family genes and transforming growth factor β1 (TGF-β1). Ishikawa cells treated with TGF-β1 also showed increased expression of LOX family genes. The Ishikawa cells were then treated with either E2 plus the TGF-β receptor (TGFBR) inhibitor SB431542 or E2 alone. The expression of LOX family genes induced by E2 was reduced in the Ishikawa cells treated with TGFBR inhibitor. Our results showed that E2 increased the expression of the LOX family genes, and suggest that this induction may be mediated by the TGF-β signal pathway. E2 may play a role in regulating the expression of LOX family genes.
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Affiliation(s)
- Wen Zong
- Institute of Developmental Biology, School of Life Science, Shandong University, Jinan 250100, China
| | - Yan Jiang
- Institute of Developmental Biology, School of Life Science, Shandong University, Jinan 250100, China
| | - Jing Zhao
- Institute of Developmental Biology, School of Life Science, Shandong University, Jinan 250100, China
| | - Jian Zhang
- Institute of Developmental Biology, School of Life Science, Shandong University, Jinan 250100, China
| | - Jian-gang Gao
- Institute of Developmental Biology, School of Life Science, Shandong University, Jinan 250100, China
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Loss of function mutation in LOX causes thoracic aortic aneurysm and dissection in humans. Proc Natl Acad Sci U S A 2016; 113:8759-64. [PMID: 27432961 DOI: 10.1073/pnas.1601442113] [Citation(s) in RCA: 126] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Thoracic aortic aneurysms and dissections (TAAD) represent a substantial cause of morbidity and mortality worldwide. Many individuals presenting with an inherited form of TAAD do not have causal mutations in the set of genes known to underlie disease. Using whole-genome sequencing in two first cousins with TAAD, we identified a missense mutation in the lysyl oxidase (LOX) gene (c.893T > G encoding p.Met298Arg) that cosegregated with disease in the family. Using clustered regularly interspaced short palindromic repeats (CRISPR)/clustered regularly interspaced short palindromic repeats-associated protein-9 nuclease (Cas9) genome engineering tools, we introduced the human mutation into the homologous position in the mouse genome, creating mice that were heterozygous and homozygous for the human allele. Mutant mice that were heterozygous for the human allele displayed disorganized ultrastructural properties of the aortic wall characterized by fragmented elastic lamellae, whereas mice homozygous for the human allele died shortly after parturition from ascending aortic aneurysm and spontaneous hemorrhage. These data suggest that a missense mutation in LOX is associated with aortic disease in humans, likely through insufficient cross-linking of elastin and collagen in the aortic wall. Mutation carriers may be predisposed to vascular diseases because of weakened vessel walls under stress conditions. LOX sequencing for clinical TAAD may identify additional mutation carriers in the future. Additional studies using our mouse model of LOX-associated TAAD have the potential to clarify the mechanism of disease and identify novel therapeutics specific to this genetic cause.
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195
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Want A, Gillespie SR, Wang Z, Gordon R, Iomini C, Ritch R, Wolosin JM, Bernstein AM. Autophagy and Mitochondrial Dysfunction in Tenon Fibroblasts from Exfoliation Glaucoma Patients. PLoS One 2016; 11:e0157404. [PMID: 27391778 PMCID: PMC4938507 DOI: 10.1371/journal.pone.0157404] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2015] [Accepted: 05/27/2016] [Indexed: 12/31/2022] Open
Abstract
Purpose To test the hypothesis that autophagy dysfunction is involved in exfoliation syndrome (XFS), a systemic disorder of extracellular elastic matrices that causes a distinct form of human glaucoma. Methods Fibroblasts derived from tenon tissue discards (TFs) from filtration surgery to relieve intraocular pressure in XFS patients were compared against age-matched TFs derived from surgery in primary open-angle glaucoma (POAG) patients or from strabismus surgery. Differential interference contrast light, and electron microscopy were used to examine structural cell features. Immunocytochemistry was used to visualize LOXL1 and Fibulin-5, lysosomes, endosomes, Golgi, and microtubules. Light scatter, Cyto-IDTM and JC1 flow cytometry were used to measure relative cell size, autophagic flux rate and mitochondrial membrane potential (MMPT), respectively. Enhanced autophagy was induced by serum withdrawal. Results In culture, XFS-TFs were 1.38-fold larger (by light scatter ratio, p = 0.05), proliferated 42% slower (p = 0.026), and were morphologically distinct in 2D and 3D culture compared to their POAG counterparts. In extended 3D cultures, XFS-TFs accumulated 8–10 times more Fibulin-5 than the POAG-TFs, and upon serum withdrawal, there were marked deficiencies in relocation of endosomes and lysosomes to the perinuclear area. Correspondingly, the XFS-TFs displayed significant accumulation of the autophagasome marker LC3 II (3.9 fold increase compared to POAG levels, p = 0.0001) and autophagic flux rate as measured by Cyto-ID dye was 53% lower in XFS-TFs than in POAG-TFs (p = 0.01), indicating reduced clearance of autophagasomes. Finally the percent of cells with diminished MMPT was 3–8 times larger in the XFS-TFs than in POAG-TFs (p = 0.02). Conclusions Our results provide for the first time a link between XFS pathology to autophagy dysfunction, a major contributor to multiple age related diseases systemically throughout the body, in the brain and in the retina. A diminished capacity for degradation of denatured protein and aging cellular organelles may underpin the development of extracellular protein aggregates in XFS.
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Affiliation(s)
- Andrew Want
- Department of Ophthalmology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, United States of America
| | - Stephanie R. Gillespie
- Department of Ophthalmology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, United States of America
- Department of Pharmacology and Systems Therapeutics, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, United States of America
| | - Zheng Wang
- Department of Ophthalmology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, United States of America
| | - Ronald Gordon
- Department of Pathology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, United States of America
| | - Carlo Iomini
- Department of Ophthalmology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, United States of America
| | - Robert Ritch
- Einhorn Clinical Research Center, New York Eye and Ear Infirmary of Mount Sinai, New York, NY, 10003, United States of America
| | - J. Mario Wolosin
- Department of Ophthalmology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, United States of America
- * E-mail: (AMB); (JMW)
| | - Audrey M. Bernstein
- Department of Ophthalmology, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, United States of America
- Department of Pharmacology and Systems Therapeutics, Icahn School of Medicine at Mount Sinai, New York, NY, 10029, United States of America
- * E-mail: (AMB); (JMW)
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Sasaki T, Hanisch FG, Deutzmann R, Sakai LY, Sakuma T, Miyamoto T, Yamamoto T, Hannappel E, Chu ML, Lanig H, von der Mark K. Functional consequence of fibulin-4 missense mutations associated with vascular and skeletal abnormalities and cutis laxa. Matrix Biol 2016; 56:132-149. [PMID: 27339457 DOI: 10.1016/j.matbio.2016.06.003] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2016] [Revised: 06/06/2016] [Accepted: 06/14/2016] [Indexed: 01/17/2023]
Abstract
Fibulin-4 is a 60kDa calcium binding glycoprotein that has an important role in development and integrity of extracellular matrices. It interacts with elastin, fibrillin-1 and collagen IV as well as with lysyl oxidases and is involved in elastogenesis and cross-link formation. To date, several mutations in the fibulin-4 gene (FBLN4/EFEMP2) are known in patients whose major symptoms are vascular deformities, aneurysm, cutis laxa, joint laxity, or arachnodactyly. The pathogenetic mechanisms how these mutations translate into the clinical phenotype are, however, poorly understood. In order to elucidate these mechanisms, we expressed fibulin-4 mutants recombinantly in HEK293 cells, purified the proteins in native forms and analyzed alterations in protein synthesis, secretion, matrix assembly, and interaction with other proteins in relation to wild type fibulin-4. Our studies show that different mutations affect these properties in multiple ways, resulting in fibulin-4 deficiency and/or impaired ability to form elastic fibers. The substitutions E126K and C267Y impaired secretion of the protein, but not mRNA synthesis. Furthermore, the E126K mutant showed less resistance to proteases, reduced binding to collagen IV and fibrillin-1, as well as to LTBP1s and LTBP4s. The A397T mutation introduced an extra O-glycosylation site and deleted binding to LTBP1s. We show that fibulin-4 binds stronger than fibulin-3 and -5 to LTBP1s, 3, and 4s, and to the lysyl oxidases LOX and LOXL1; the binding of fibulin-4 to the LOX propeptide was strongly reduced by the mutation E57K. These findings show that different mutations in the fibulin-4 gene result in different molecular defects affecting secretion rates, protein stability, LOX-induced cross-linking, or binding to other ECM components and molecules of the TGF-β pathway, and thus illustrate the complex role of fibulin-4 in connective tissue assembly.
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Affiliation(s)
- Takako Sasaki
- Department of Experimental Medicine I, Nikolaus-Fiebiger Center of Molecular Medicine, University of Erlangen-Nürnberg, 91054 Erlangen, Germany; Department of Biochemistry II, Faculty of Medicine, Oita University, Oita 879-5593, Japan.
| | - Franz-Georg Hanisch
- Institute for Biochemistry II, Medical Faculty, Center for Molecular Medicine Cologne (CMMC), University of Cologne, 50931 Cologne, Germany
| | - Rainer Deutzmann
- Institute of Biochemistry, Microbiology and Genetics, University of Regensburg, 93053 Regensburg, Germany
| | - Lynn Y Sakai
- Shriners Hospital for Children, Portland Research Center, Department of Biochemistry and Molecular Biology, Oregon Health & Science University, Portland, Oregon 97239, USA
| | - Tetsushi Sakuma
- Department of Mathematical and Life Sciences, Graduate School of Science, Hiroshima University, Hiroshima 739-8526, Japan
| | - Tatsuo Miyamoto
- Department of Genetics and Cell Biology, Research Institute for Radiation Biology and Medicine, Hiroshima University, Hiroshima 734-8553, Japan
| | - Takashi Yamamoto
- Department of Mathematical and Life Sciences, Graduate School of Science, Hiroshima University, Hiroshima 739-8526, Japan
| | - Ewald Hannappel
- Institut für Biochemie, Emil-Fischer-Zentrum, University of Erlangen-Nürnberg, 91054 Erlangen, Germany
| | - Mon-Li Chu
- Department of Dermatology and Cutaneous Biology, Thomas Jefferson University, Philadelphia, PA 19107, USA
| | - Harald Lanig
- Central Institute for Scientific Computing (ZISC), University of Erlangen-Nürnberg, 91058 Erlangen, Germany
| | - Klaus von der Mark
- Department of Experimental Medicine I, Nikolaus-Fiebiger Center of Molecular Medicine, University of Erlangen-Nürnberg, 91054 Erlangen, Germany
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Takaoka A, Babar N, Hogan J, Kim M, Price MO, Price FW, Trokel SL, Paik DC. An Evaluation of Lysyl Oxidase-Derived Cross-Linking in Keratoconus by Liquid Chromatography/Mass Spectrometry. Invest Ophthalmol Vis Sci 2016; 57:126-36. [PMID: 26780316 PMCID: PMC4727527 DOI: 10.1167/iovs.15-18105] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Purpose Current literature contains scant information regarding the extent of enzymatic collagen cross-linking in the keratoconus (KC) cornea. The aim of the present study was to examine levels of enzymatic lysyl oxidase–derived cross-links in stromal collagen in KC tissue, and to correlate the cross-link levels with collagen fibril stability as determined by thermal denaturation temperature (Tm). Methods Surgical KC samples (n = 17) and Eye-Bank control (n = 11) corneas of age 18 to 68 years were analyzed. The samples were defatted, reduced (NaBH4), hydrolyzed (6N HCl at 110°C for 18 hours), and cellulose enriched before analysis by C8 high-performance liquid chromatography equipped with parallel fluorescent and mass detectors in selective ion monitoring mode (20 mM heptafluorobutyric acid/methanol 70:30 isocratic at 1 mL/min). Nine different cross-links were measured, and the cross-link density was determined relative to collagen content (determined colorimetrically). The Tm was determined by differential scanning calorimetry. Results Cross-links detected were dihydroxylysinonorleucine (DHLNL), hydroxylysinonorleucine, lysinonorleucine (LNL), and histidinohydroxylysinonorleucine in both control and KC samples. Higher DHLNL levels were detected in KC, whereas the dominant cross-link, LNL, was decreased in KC samples. Decreased LNL levels were observed among KC ≤ 40 corneas. There was no difference in total cross-link density between KC samples and the controls. Pyridinolines, desmosines, and pentosidine were not detected. There was no notable correlation between cross-link levels with fibril instability as determined by Tm. Conclusions Lower levels of LNL in the KC cornea suggest that there might be a cross-linking defect either in fibrillar collagen or the microfibrillar elastic network composed of fibrillin.
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Affiliation(s)
- Anna Takaoka
- Department of Ophthalmology Columbia University College of Physicians and Surgeons, New York, New York, United States
| | - Natasha Babar
- Department of Ophthalmology Columbia University College of Physicians and Surgeons, New York, New York, United States
| | - Julia Hogan
- Department of Ophthalmology Columbia University College of Physicians and Surgeons, New York, New York, United States
| | - MiJung Kim
- Department of Ophthalmology Columbia University College of Physicians and Surgeons, New York, New York, United States
| | - Marianne O Price
- The Cornea Research Foundation of America, Indianapolis, Indiana, United States
| | | | - Stephen L Trokel
- Department of Ophthalmology Columbia University College of Physicians and Surgeons, New York, New York, United States
| | - David C Paik
- Department of Ophthalmology Columbia University College of Physicians and Surgeons, New York, New York, United States
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Chin K, Wieslander C, Shi H, Balgobin S, Montoya TI, Yanagisawa H, Word RA. Pelvic Organ Support in Animals with Partial Loss of Fibulin-5 in the Vaginal Wall. PLoS One 2016; 11:e0152793. [PMID: 27124299 PMCID: PMC4849714 DOI: 10.1371/journal.pone.0152793] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2015] [Accepted: 03/18/2016] [Indexed: 01/15/2023] Open
Abstract
Compromise of elastic fiber integrity in connective tissues of the pelvic floor is most likely acquired through aging, childbirth-associated injury, and genetic susceptibility. Mouse models of pelvic organ prolapse demonstrate systemic deficiencies in proteins that affect elastogenesis. Prolapse, however, does not occur until several months after birth and is thereby acquired with age or after parturition. To determine the impact of compromised levels of fibulin-5 (Fbln5) during adulthood on pelvic organ support after parturition and elastase-induced injury, tissue-specific conditional knockout (cKO) mice were generated in which doxycycline (dox) treatment results in deletion of Fbln5 in cells that utilize the smooth muscle α actin promoter-driven reverse tetracycline transactivator and tetracycline responsive element-Cre recombinase (i.e., Fbln5f/f/SMA++-rtTA/Cre+, cKO). Fbln5 was decreased significantly in the vagina of cKO mice compared with dox-treated wild type or controls (Fbln5f/f/SMA++-rtTA/Cre-/-). In controls, perineal body length (PBL) and bulge increased significantly after delivery but declined to baseline values within 6-8 weeks. Although overt prolapse did not occur in cKO animals, these transient increases in PBL postpartum were amplified and, unlike controls, parturition-induced increases in PBL (and bulge) did not recover to baseline but remained significantly increased for 12 wks. This lack of recovery from parturition was associated with increased MMP-9 and nondetectable levels of Fbln5 in the postpartum vagina. This predisposition to prolapse was accentuated by injection of elastase into the vaginal wall in which overt prolapse occurred in cKO animals, but rarely in controls. Taken together, our model system in which Fbln5 is conditionally knock-downed in stromal cells of the pelvic floor results in animals that undergo normal elastogenesis during development but lose Fbln5 as adults. The results indicate that vaginal fibulin-5 during development is crucial for baseline pelvic organ support and is also important for protection and recovery from parturition- and elastase-induced prolapse.
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Affiliation(s)
- Kathleen Chin
- Department of Obstetrics and Gynecology, Division of Female Pelvic Medicine and Reconstructive Surgery, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
| | - Cecilia Wieslander
- Department of Obstetrics and Gynecology, Division of Female Pelvic Medicine and Reconstructive Surgery, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
| | - Haolin Shi
- Department of Obstetrics and Gynecology, Division of Female Pelvic Medicine and Reconstructive Surgery, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
| | - Sunil Balgobin
- Department of Obstetrics and Gynecology, Division of Female Pelvic Medicine and Reconstructive Surgery, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
| | - T. Ignacio Montoya
- Department of Obstetrics and Gynecology, Division of Female Pelvic Medicine and Reconstructive Surgery, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
| | - Hiromi Yanagisawa
- Department of Molecular Biology, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
| | - R. Ann Word
- Department of Obstetrics and Gynecology, Division of Female Pelvic Medicine and Reconstructive Surgery, University of Texas Southwestern Medical Center, Dallas, Texas, United States of America
- * E-mail:
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Gayathri R, Coral K, Sharmila F, Sripriya S, Sripriya K, Manish P, Shantha B, Ronnie G, Vijaya L, Narayanasamy A. Correlation of Aqueous Humor Lysyl Oxidase Activity with TGF-ß Levels and LOXL1 Genotype in Pseudoexfoliation. Curr Eye Res 2016; 41:1331-1338. [PMID: 27116380 DOI: 10.3109/02713683.2015.1125505] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
PURPOSE Pseudoexfoliation (PXF) is a microfibrillopathy involving disordered elastogenesis. Abnormal extracellular matrix (ECM) production underlies the pathophysiology of PXF. The enzyme Lysyl oxidase (LOX) and its isoforms are known to cross-link the elastin and collagen. Though the etiopathogensis of PXF is not well understood, studies report on the genetic risk involving LOXL1 gene. This study aims to screen LOXL1 coding variants rs1048661 and rs3825942 in the South Indian population and the implication of the single nucleotide polymorphism (SNP) with LOX activity. The levels of transforming growth factor β (TGF-β) in aqueous humor and its correlation with the LOX activity were also examined. METHODS Blood, plasma, and aqueous aspirates were prospectively collected from PXF cases with and without glaucoma and cataract cases as controls. DNA was extracted from 48 PXF cases without glaucoma, 12 PXF cases with glaucoma, and 40 age-matched cataract-alone controls without PXF/glaucoma for analyzing LOX SNPs. LOX activity was measured in aqueous humor and plasma of 30 PXF cases without glaucoma, 24 age-matched cataract-alone controls without PXF/glaucoma, and 14 PXF cases with glaucoma. Protein levels of LOX, LOXL1, LOXL2, and total TGF-β were estimated in plasma and aqueous humor by ELISA. RESULTS The specific activity of LOX in aqueous humor was found to be significantly lowered in PXF cases compared with cataract-alone controls (p = 0.014). This decrease in LOX activity in PXF cases was associated with high-risk GG haplotype. However, this was not statistically significant and a larger sample size is warranted. TGF-β1 and TGF-β2 negatively correlated with LOX activity in aqueous humor (p = 0.028; p = 0.046, respectively). CONCLUSIONS The LOXL1 SNPs, rs1048661 and rs3825942, are associated with PXF in the South Indian population correlating with lowered LOX activity in the aqueous humor. The increased level of total TGF-β in the aqueous humor of PXF cases is possibly associated with LOX regulation which needs further investigation.
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Affiliation(s)
- Ramakrishnan Gayathri
- a R.S. Mehta Jain Department of Biochemistry and Cell Biology , Vision Research Foundation, KNBIRVO , Sankara Nethralaya, Chennai , India
| | - Karunakaran Coral
- a R.S. Mehta Jain Department of Biochemistry and Cell Biology , Vision Research Foundation, KNBIRVO , Sankara Nethralaya, Chennai , India
| | - Ferdinamarie Sharmila
- b SNONGC Department of Genetics and Molecular Biology , Vision Research Foundation, KNBIRVO , Sankara Nethralaya, Chennai , India
| | - Sarangapani Sripriya
- b SNONGC Department of Genetics and Molecular Biology , Vision Research Foundation, KNBIRVO , Sankara Nethralaya, Chennai , India
| | | | - Panday Manish
- d Department of Glaucoma , Medical Research Foundation , Sankara Nethralaya, Chennai , India
| | - B Shantha
- d Department of Glaucoma , Medical Research Foundation , Sankara Nethralaya, Chennai , India
| | - George Ronnie
- d Department of Glaucoma , Medical Research Foundation , Sankara Nethralaya, Chennai , India
| | - Lingam Vijaya
- d Department of Glaucoma , Medical Research Foundation , Sankara Nethralaya, Chennai , India
| | - Angayarkanni Narayanasamy
- a R.S. Mehta Jain Department of Biochemistry and Cell Biology , Vision Research Foundation, KNBIRVO , Sankara Nethralaya, Chennai , India
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Abstract
AIM There were several studies that have researched the associations between lysyl oxidase-like 1 (LOXL1) gene polymorphism and the susceptibility to exfoliation syndrome (XFS)/exfoliation glaucoma (XFG), but results have been inconclusive. MATERIALS AND METHODS A meta-analysis was performed for deriving more exact estimation of the relationship. Twenty-five studies were selected for studying rs1048661 and rs3825942. Sixteen studies were selected for studying rs2165241. RESULTS Single nucleotide polymorphism (SNP) rs1048661 was found to be associated with XFS/XFG, but the risk allele in white populations was found to be G, as opposite to the T allele in Japanese, Chinese, and Korean populations. The SNP rs3825942 was significantly associated with XFS in this black South African population. However, the AA genotype of rs3825942 confers XFS risk in this population, as opposed to the GG genotype described in all other populations. SNP rs2165241 was found to be associated with XFS/XFG, but the risk allele in white populations was found to be T, as opposite to the "C" allele in Japanese and Korean populations. CONCLUSIONS Our meta-analysis indicates that rs1048661 ("G" alleles) had weak association with XFG/XFS; rs3825942 ("G" alleles) had strongly association with XFG/XFS; and rs2165241("T" alleles) had significant risk with XFG/XFS in some ethnicity.
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