Evaluation of global differential gene and protein expression in primary Pterygium: S100A8 and S100A9 as possible drivers of a signaling network

Pterygium is a wing shaped fibrovascular growth on the ocular surface, characterized by fibrosis, angiogenesis, extracellular matrix remodeling, and inflammatory infiltrates. Epidemiologic studies have linked pterygium formation to various chronic inflammatory conditions, such as ultraviolet radiati...

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Veröffentlicht in:PloS one 2014-05, Vol.9 (5), p.e97402-e97402
Hauptverfasser: Hou, Aihua, Lan, Wanwen, Law, Kai Pong, Khoo, Ser Chin Jasmine, Tin, Min Qi, Lim, Yoon Pin, Tong, Louis
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container_issue 5
container_start_page e97402
container_title PloS one
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creator Hou, Aihua
Lan, Wanwen
Law, Kai Pong
Khoo, Ser Chin Jasmine
Tin, Min Qi
Lim, Yoon Pin
Tong, Louis
description Pterygium is a wing shaped fibrovascular growth on the ocular surface, characterized by fibrosis, angiogenesis, extracellular matrix remodeling, and inflammatory infiltrates. Epidemiologic studies have linked pterygium formation to various chronic inflammatory conditions, such as ultraviolet radiation, sawdust exposure, and dry eye disease. The purpose of this study is to identify proteins that are differentially expressed in primary pterygium by using a combination of gene microarray and proteomic platforms. Paired pterygium and uninvolved conjunctiva tissues of four patients were evaluated for differences in global gene transcript levels using a genechip microarray. Proteins extracted from another four pairs of tissues were quantified by iTRAQ approach. Western blot and immunofluorescent staining on additional patients were used to validate dysregulated protein expression obtained from microarray and proteomics data. In addition, primary conjunctival fibroblasts were treated with recombinant S100A8, S100A9 or both. Transcript level changes of a panel of potential target genes were evaluated by real time-PCR. The following were up-regulated at both protein and transcript levels S100 A8 and A9, aldehyde dehydrogenase 3 family, member1 (ALDH3A1) and vimentin (VIM). Conversely, serpin peptidase inhibitor clade A member 1 (SERPINA1) and transferrin (TF) were down-regulated. Upon adding S100A8, S100A9 or both, the inflammatory chemokine CXCL1, matrix proteins vimentin, biglycan, and gelsolin, as well as annexin-A2, thymosin-β4, chymase (CMA1), member of Ras oncogene family RAB10 and SERPINA1 were found to be up-regulated. We identified 3 up-regulated and 2 down-regulated proteins by using a stringent approach comparing microarray and proteomic data. On stimulating cells with S100A8/9, a repertoire of key genes found to be up-regulated in pterygium tissue, were induced in these cells. S100A8/9 may be an upstream trigger for inflammation and other disease pathways in pterygium.
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Epidemiologic studies have linked pterygium formation to various chronic inflammatory conditions, such as ultraviolet radiation, sawdust exposure, and dry eye disease. The purpose of this study is to identify proteins that are differentially expressed in primary pterygium by using a combination of gene microarray and proteomic platforms. Paired pterygium and uninvolved conjunctiva tissues of four patients were evaluated for differences in global gene transcript levels using a genechip microarray. Proteins extracted from another four pairs of tissues were quantified by iTRAQ approach. Western blot and immunofluorescent staining on additional patients were used to validate dysregulated protein expression obtained from microarray and proteomics data. In addition, primary conjunctival fibroblasts were treated with recombinant S100A8, S100A9 or both. Transcript level changes of a panel of potential target genes were evaluated by real time-PCR. The following were up-regulated at both protein and transcript levels S100 A8 and A9, aldehyde dehydrogenase 3 family, member1 (ALDH3A1) and vimentin (VIM). Conversely, serpin peptidase inhibitor clade A member 1 (SERPINA1) and transferrin (TF) were down-regulated. Upon adding S100A8, S100A9 or both, the inflammatory chemokine CXCL1, matrix proteins vimentin, biglycan, and gelsolin, as well as annexin-A2, thymosin-β4, chymase (CMA1), member of Ras oncogene family RAB10 and SERPINA1 were found to be up-regulated. We identified 3 up-regulated and 2 down-regulated proteins by using a stringent approach comparing microarray and proteomic data. On stimulating cells with S100A8/9, a repertoire of key genes found to be up-regulated in pterygium tissue, were induced in these cells. S100A8/9 may be an upstream trigger for inflammation and other disease pathways in pterygium.</description><identifier>ISSN: 1932-6203</identifier><identifier>EISSN: 1932-6203</identifier><identifier>DOI: 10.1371/journal.pone.0097402</identifier><identifier>PMID: 24825356</identifier><language>eng</language><publisher>United States: Public Library of Science</publisher><subject>Aldehyde dehydrogenase ; Aldehyde Dehydrogenase - metabolism ; alpha 1-Antitrypsin - metabolism ; Angiogenesis ; Biglycan - metabolism ; Biochemistry ; Biology and Life Sciences ; Blotting, Western ; Calgranulin A - genetics ; Calgranulin A - metabolism ; Calgranulin B - genetics ; Calgranulin B - metabolism ; Chemokine CXCL1 - metabolism ; Chymase ; Conjunctiva ; Cornea ; DNA microarrays ; Epidemiology ; Extracellular matrix ; Fibroblasts ; Fibrosis ; Fluorescent Antibody Technique ; Gelsolin ; Gelsolin - metabolism ; Gene expression ; Gene Expression Regulation - genetics ; Genes ; Genomes ; Genomics ; Humans ; Inflammation ; Medicine and Health Sciences ; Oligonucleotide Array Sequence Analysis ; Pathogenesis ; Patients ; Peptidase ; Protein arrays ; Proteins ; Proteomics ; Proteomics - methods ; Pterygium - genetics ; Pterygium - metabolism ; Real-Time Polymerase Chain Reaction ; RNA polymerase ; Sawdust ; Signal Transduction - genetics ; Signaling ; Tissues ; Transcription ; Transferrin ; Transferrin - metabolism ; U.V. radiation ; Ultraviolet radiation ; Vimentin ; Vimentin - metabolism</subject><ispartof>PloS one, 2014-05, Vol.9 (5), p.e97402-e97402</ispartof><rights>2014 Hou et al. 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Epidemiologic studies have linked pterygium formation to various chronic inflammatory conditions, such as ultraviolet radiation, sawdust exposure, and dry eye disease. The purpose of this study is to identify proteins that are differentially expressed in primary pterygium by using a combination of gene microarray and proteomic platforms. Paired pterygium and uninvolved conjunctiva tissues of four patients were evaluated for differences in global gene transcript levels using a genechip microarray. Proteins extracted from another four pairs of tissues were quantified by iTRAQ approach. Western blot and immunofluorescent staining on additional patients were used to validate dysregulated protein expression obtained from microarray and proteomics data. In addition, primary conjunctival fibroblasts were treated with recombinant S100A8, S100A9 or both. Transcript level changes of a panel of potential target genes were evaluated by real time-PCR. The following were up-regulated at both protein and transcript levels S100 A8 and A9, aldehyde dehydrogenase 3 family, member1 (ALDH3A1) and vimentin (VIM). Conversely, serpin peptidase inhibitor clade A member 1 (SERPINA1) and transferrin (TF) were down-regulated. Upon adding S100A8, S100A9 or both, the inflammatory chemokine CXCL1, matrix proteins vimentin, biglycan, and gelsolin, as well as annexin-A2, thymosin-β4, chymase (CMA1), member of Ras oncogene family RAB10 and SERPINA1 were found to be up-regulated. We identified 3 up-regulated and 2 down-regulated proteins by using a stringent approach comparing microarray and proteomic data. On stimulating cells with S100A8/9, a repertoire of key genes found to be up-regulated in pterygium tissue, were induced in these cells. S100A8/9 may be an upstream trigger for inflammation and other disease pathways in pterygium.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>24825356</pmid><doi>10.1371/journal.pone.0097402</doi><oa>free_for_read</oa></addata></record>
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subjects Aldehyde dehydrogenase
Aldehyde Dehydrogenase - metabolism
alpha 1-Antitrypsin - metabolism
Angiogenesis
Biglycan - metabolism
Biochemistry
Biology and Life Sciences
Blotting, Western
Calgranulin A - genetics
Calgranulin A - metabolism
Calgranulin B - genetics
Calgranulin B - metabolism
Chemokine CXCL1 - metabolism
Chymase
Conjunctiva
Cornea
DNA microarrays
Epidemiology
Extracellular matrix
Fibroblasts
Fibrosis
Fluorescent Antibody Technique
Gelsolin
Gelsolin - metabolism
Gene expression
Gene Expression Regulation - genetics
Genes
Genomes
Genomics
Humans
Inflammation
Medicine and Health Sciences
Oligonucleotide Array Sequence Analysis
Pathogenesis
Patients
Peptidase
Protein arrays
Proteins
Proteomics
Proteomics - methods
Pterygium - genetics
Pterygium - metabolism
Real-Time Polymerase Chain Reaction
RNA polymerase
Sawdust
Signal Transduction - genetics
Signaling
Tissues
Transcription
Transferrin
Transferrin - metabolism
U.V. radiation
Ultraviolet radiation
Vimentin
Vimentin - metabolism
title Evaluation of global differential gene and protein expression in primary Pterygium: S100A8 and S100A9 as possible drivers of a signaling network
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