Histone Acetyltransferase-Dependent Pathways Mediate Upregulation of NADPH Oxidase 5 in Human Macrophages under Inflammatory Conditions: A Potential Mechanism of Reactive Oxygen Species Overproduction in Atherosclerosis

Histone acetylation plays a major role in epigenetic regulation of gene expression. Monocyte-derived macrophages express functional NADPH oxidase 5 (Nox5) that contributes to oxidative stress in atherogenesis. The mechanisms of Nox5 regulation are not entirely elucidated. The aim of this study was t...

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Veröffentlicht in:Oxidative medicine and cellular longevity 2019, Vol.2019 (2019), p.1-17
Hauptverfasser: Manea, Adrian, Muresian, Horia, Raicu, Monica, Lazar, Alexandra-Gela, Manea, Simona-Adriana, Vlad, Mihaela-Loredana, Simionescu, Maya
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container_end_page 17
container_issue 2019
container_start_page 1
container_title Oxidative medicine and cellular longevity
container_volume 2019
creator Manea, Adrian
Muresian, Horia
Raicu, Monica
Lazar, Alexandra-Gela
Manea, Simona-Adriana
Vlad, Mihaela-Loredana
Simionescu, Maya
description Histone acetylation plays a major role in epigenetic regulation of gene expression. Monocyte-derived macrophages express functional NADPH oxidase 5 (Nox5) that contributes to oxidative stress in atherogenesis. The mechanisms of Nox5 regulation are not entirely elucidated. The aim of this study was to investigate the expression pattern of key histone acetyltransferase subtypes (p300, HAT1) in human atherosclerosis and to determine their role in mediating the upregulation of Nox5 in macrophages under inflammatory conditions. Human nonatherosclerotic and atherosclerotic tissue samples were collected in order to determine the expression of p300 and HAT1 isoforms, H3K27ac, and Nox5. In vitro determinations were done on human macrophages exposed to lipopolysaccharide in the absence or presence of histone acetyltransferase inhibitors. Western blot, immunohistochemistry, immunofluorescence, real-time PCR, transfection, and chromatin immunoprecipitation assay were employed. The protein levels of p300 and HAT1 isoforms, H3K27ac, and Nox5 were found significantly elevated in human atherosclerotic specimens. Immunohistochemistry/immunofluorescence staining revealed that p300, HAT1, H3K27ac, H3K9ac, and Nox5 proteins were colocalized in the area of CD45+/CD68+ immune cells and lipid-rich deposits within human atherosclerotic plaques. Lipopolysaccharide induced the levels of HAT1, H3K27ac, H3K9ac, and Nox5 and the recruitment of p300 and HAT1 at the sites of active transcription within Nox5 gene promoter in cultured human macrophages. Pharmacological inhibition of histone acetyltransferase significantly reduced the Nox5 gene and protein expression in lipopolysaccharide-challenged macrophages. The overexpression of p300 or HAT1 enhanced the Nox5 gene promoter activity. The histone acetyltransferase system is altered in human atherosclerosis. Under inflammatory conditions, HAT subtypes control Nox5 overexpression in cultured human macrophages. The data suggest the existence of a new epigenetic mechanism underlying oxidative stress in atherosclerosis.
doi_str_mv 10.1155/2019/3201062
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Monocyte-derived macrophages express functional NADPH oxidase 5 (Nox5) that contributes to oxidative stress in atherogenesis. The mechanisms of Nox5 regulation are not entirely elucidated. The aim of this study was to investigate the expression pattern of key histone acetyltransferase subtypes (p300, HAT1) in human atherosclerosis and to determine their role in mediating the upregulation of Nox5 in macrophages under inflammatory conditions. Human nonatherosclerotic and atherosclerotic tissue samples were collected in order to determine the expression of p300 and HAT1 isoforms, H3K27ac, and Nox5. In vitro determinations were done on human macrophages exposed to lipopolysaccharide in the absence or presence of histone acetyltransferase inhibitors. Western blot, immunohistochemistry, immunofluorescence, real-time PCR, transfection, and chromatin immunoprecipitation assay were employed. The protein levels of p300 and HAT1 isoforms, H3K27ac, and Nox5 were found significantly elevated in human atherosclerotic specimens. Immunohistochemistry/immunofluorescence staining revealed that p300, HAT1, H3K27ac, H3K9ac, and Nox5 proteins were colocalized in the area of CD45+/CD68+ immune cells and lipid-rich deposits within human atherosclerotic plaques. Lipopolysaccharide induced the levels of HAT1, H3K27ac, H3K9ac, and Nox5 and the recruitment of p300 and HAT1 at the sites of active transcription within Nox5 gene promoter in cultured human macrophages. Pharmacological inhibition of histone acetyltransferase significantly reduced the Nox5 gene and protein expression in lipopolysaccharide-challenged macrophages. The overexpression of p300 or HAT1 enhanced the Nox5 gene promoter activity. The histone acetyltransferase system is altered in human atherosclerosis. Under inflammatory conditions, HAT subtypes control Nox5 overexpression in cultured human macrophages. The data suggest the existence of a new epigenetic mechanism underlying oxidative stress in atherosclerosis.</description><identifier>ISSN: 1942-0900</identifier><identifier>EISSN: 1942-0994</identifier><identifier>DOI: 10.1155/2019/3201062</identifier><identifier>PMID: 31565149</identifier><language>eng</language><publisher>Cairo, Egypt: Hindawi Publishing Corporation</publisher><subject>Atherosclerosis ; Atherosclerosis - enzymology ; Atherosclerosis - genetics ; Atherosclerosis - metabolism ; Atherosclerosis - pathology ; Cell culture ; Diabetes ; E1A-Associated p300 Protein - genetics ; E1A-Associated p300 Protein - metabolism ; Epigenesis, Genetic ; Epigenetic inheritance ; Epigenetics ; Gene expression ; Genes ; Genetic transcription ; Histone Acetyltransferases - genetics ; Histone Acetyltransferases - metabolism ; Histones ; Histones - biosynthesis ; Histones - genetics ; Histones - metabolism ; Humans ; Immunohistochemistry ; Kinases ; Laboratories ; Lipopolysaccharides - pharmacology ; Macrophages ; Macrophages - drug effects ; Macrophages - enzymology ; Macrophages - pathology ; Mitogens ; NADPH Oxidase 5 - biosynthesis ; NADPH Oxidase 5 - genetics ; NADPH Oxidase 5 - metabolism ; Oxidases ; Oxidative stress ; Proteins ; Reactive oxygen species ; Reactive Oxygen Species - metabolism ; Scientific equipment and supplies industry ; THP-1 Cells ; Transcription factors ; Transfection ; Up-Regulation</subject><ispartof>Oxidative medicine and cellular longevity, 2019, Vol.2019 (2019), p.1-17</ispartof><rights>Copyright © 2019 Mihaela-Loredana Vlad et al.</rights><rights>COPYRIGHT 2019 John Wiley &amp; Sons, Inc.</rights><rights>Copyright © 2019 Mihaela-Loredana Vlad et al. This is an open access article distributed under the Creative Commons Attribution License (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. 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The data suggest the existence of a new epigenetic mechanism underlying oxidative stress in atherosclerosis.</description><subject>Atherosclerosis</subject><subject>Atherosclerosis - enzymology</subject><subject>Atherosclerosis - genetics</subject><subject>Atherosclerosis - metabolism</subject><subject>Atherosclerosis - pathology</subject><subject>Cell culture</subject><subject>Diabetes</subject><subject>E1A-Associated p300 Protein - genetics</subject><subject>E1A-Associated p300 Protein - metabolism</subject><subject>Epigenesis, Genetic</subject><subject>Epigenetic inheritance</subject><subject>Epigenetics</subject><subject>Gene expression</subject><subject>Genes</subject><subject>Genetic transcription</subject><subject>Histone Acetyltransferases - genetics</subject><subject>Histone Acetyltransferases - metabolism</subject><subject>Histones</subject><subject>Histones - biosynthesis</subject><subject>Histones - genetics</subject><subject>Histones - metabolism</subject><subject>Humans</subject><subject>Immunohistochemistry</subject><subject>Kinases</subject><subject>Laboratories</subject><subject>Lipopolysaccharides - pharmacology</subject><subject>Macrophages</subject><subject>Macrophages - drug effects</subject><subject>Macrophages - enzymology</subject><subject>Macrophages - pathology</subject><subject>Mitogens</subject><subject>NADPH Oxidase 5 - biosynthesis</subject><subject>NADPH Oxidase 5 - genetics</subject><subject>NADPH Oxidase 5 - metabolism</subject><subject>Oxidases</subject><subject>Oxidative stress</subject><subject>Proteins</subject><subject>Reactive oxygen species</subject><subject>Reactive Oxygen Species - metabolism</subject><subject>Scientific equipment and supplies industry</subject><subject>THP-1 Cells</subject><subject>Transcription factors</subject><subject>Transfection</subject><subject>Up-Regulation</subject><issn>1942-0900</issn><issn>1942-0994</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><sourceid>RHX</sourceid><sourceid>EIF</sourceid><sourceid>8G5</sourceid><sourceid>ABUWG</sourceid><sourceid>AFKRA</sourceid><sourceid>AZQEC</sourceid><sourceid>BENPR</sourceid><sourceid>CCPQU</sourceid><sourceid>DWQXO</sourceid><sourceid>GNUQQ</sourceid><sourceid>GUQSH</sourceid><sourceid>M2O</sourceid><recordid>eNqNkk9v0zAYhyMEYmNw44wscUGCMjtx_u2AFHVAJ210gnGO3jqvG0-JHWyno5-VL4NDSwecuNiR_eT5-bXfKHrO6FvG0vQ0pqw8TcJIs_hBdMxKHs9oWfKHh29Kj6Inzt1SmiUxZ4-jo4SlWcp4eRz9WCjnjUZSCfTbzlvQTqIFh7NzHFA3qD25Bt_ewdaRK2wUeCRfB4vrsQOvjCZGkk_V-fWCLL-rJvxIUqI0WYw9aHIFwpqhhTU6MgaZJRdadtD34I3dkrnRjZok7oxU5Nr4kKagCzmiBa1cP8k_IwivNhj82zVq8mVAoYJvuUE7WNOM4tcxQmblW7TGiW4alXsaPZLQOXy2n0-imw_vb-aL2eXy48W8upwJXpZ-VnAmgTU8o7nkRdHIOC3YSqbTBaVpgWKFKy4ka8oyzwVQwXiBWEgI6zlmyUn0bqcdxlWPjQg1WOjqwaoe7LY2oOq_d7Rq67XZ1FnOQ0YSBK_2Amu-jeh83SsnsOtAoxldHcfhOXmZsyKgL_9Bb81odahuomiepklK76k1dFgrLU3IFZO0rjIaYsuMTbFvdlR4IucsysORGa2n1qqn1qr3rRXwF3-WeYB_91IAXu-AVukG7tR_6jAwKOGejmnCkiz5CdjQ5SI</recordid><startdate>2019</startdate><enddate>2019</enddate><creator>Manea, Adrian</creator><creator>Muresian, Horia</creator><creator>Raicu, Monica</creator><creator>Lazar, Alexandra-Gela</creator><creator>Manea, Simona-Adriana</creator><creator>Vlad, Mihaela-Loredana</creator><creator>Simionescu, Maya</creator><general>Hindawi Publishing Corporation</general><general>Hindawi</general><general>John Wiley &amp; 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Monocyte-derived macrophages express functional NADPH oxidase 5 (Nox5) that contributes to oxidative stress in atherogenesis. The mechanisms of Nox5 regulation are not entirely elucidated. The aim of this study was to investigate the expression pattern of key histone acetyltransferase subtypes (p300, HAT1) in human atherosclerosis and to determine their role in mediating the upregulation of Nox5 in macrophages under inflammatory conditions. Human nonatherosclerotic and atherosclerotic tissue samples were collected in order to determine the expression of p300 and HAT1 isoforms, H3K27ac, and Nox5. In vitro determinations were done on human macrophages exposed to lipopolysaccharide in the absence or presence of histone acetyltransferase inhibitors. Western blot, immunohistochemistry, immunofluorescence, real-time PCR, transfection, and chromatin immunoprecipitation assay were employed. The protein levels of p300 and HAT1 isoforms, H3K27ac, and Nox5 were found significantly elevated in human atherosclerotic specimens. Immunohistochemistry/immunofluorescence staining revealed that p300, HAT1, H3K27ac, H3K9ac, and Nox5 proteins were colocalized in the area of CD45+/CD68+ immune cells and lipid-rich deposits within human atherosclerotic plaques. Lipopolysaccharide induced the levels of HAT1, H3K27ac, H3K9ac, and Nox5 and the recruitment of p300 and HAT1 at the sites of active transcription within Nox5 gene promoter in cultured human macrophages. Pharmacological inhibition of histone acetyltransferase significantly reduced the Nox5 gene and protein expression in lipopolysaccharide-challenged macrophages. The overexpression of p300 or HAT1 enhanced the Nox5 gene promoter activity. The histone acetyltransferase system is altered in human atherosclerosis. Under inflammatory conditions, HAT subtypes control Nox5 overexpression in cultured human macrophages. The data suggest the existence of a new epigenetic mechanism underlying oxidative stress in atherosclerosis.</abstract><cop>Cairo, Egypt</cop><pub>Hindawi Publishing Corporation</pub><pmid>31565149</pmid><doi>10.1155/2019/3201062</doi><tpages>17</tpages><orcidid>https://orcid.org/0000-0002-8795-3095</orcidid><oa>free_for_read</oa></addata></record>
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subjects Atherosclerosis
Atherosclerosis - enzymology
Atherosclerosis - genetics
Atherosclerosis - metabolism
Atherosclerosis - pathology
Cell culture
Diabetes
E1A-Associated p300 Protein - genetics
E1A-Associated p300 Protein - metabolism
Epigenesis, Genetic
Epigenetic inheritance
Epigenetics
Gene expression
Genes
Genetic transcription
Histone Acetyltransferases - genetics
Histone Acetyltransferases - metabolism
Histones
Histones - biosynthesis
Histones - genetics
Histones - metabolism
Humans
Immunohistochemistry
Kinases
Laboratories
Lipopolysaccharides - pharmacology
Macrophages
Macrophages - drug effects
Macrophages - enzymology
Macrophages - pathology
Mitogens
NADPH Oxidase 5 - biosynthesis
NADPH Oxidase 5 - genetics
NADPH Oxidase 5 - metabolism
Oxidases
Oxidative stress
Proteins
Reactive oxygen species
Reactive Oxygen Species - metabolism
Scientific equipment and supplies industry
THP-1 Cells
Transcription factors
Transfection
Up-Regulation
title Histone Acetyltransferase-Dependent Pathways Mediate Upregulation of NADPH Oxidase 5 in Human Macrophages under Inflammatory Conditions: A Potential Mechanism of Reactive Oxygen Species Overproduction in Atherosclerosis
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