Immunohistochemistry pattern of hepatic inflammatory and insulin resistance markers in experimental model of nonalcoholic steatohepatitis
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Jornal Brasileiro de Patologia e Medicina Laboratorial (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1676-24442014000200136 |
Resumo: | Introduction:The pathophysiology of nonalcoholic steatohepatitis (NAS) includes, basically, insulin resistance, inflammation and oxidative stress. Thus, a study of immunostaining for liver insulin, adiponectin, tumor necrosis factor alpha (TNF-α), and inducible nitric oxide synthase (iNOS) receptors was conducted.Objective:To expand the knowledge about the pathophysiological and molecular mechanisms underlying the experimental model of steatohepatitis in rats fed a high-fat diet.Method:Twenty Wistar rats were divided into two groups: G1 (control, fed a standard diet), and G2 (fed a high-fat diet containing 58% of energy derived from fat, 18% from protein and 24% from carbohydrate). After eight weeks the animals were sacrificed. Blood glucose, insulin, total cholesterol, high-density lipoprotein (HDL), the very low-density lipoproteins (VLDL), triglycerides, aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP) and gamma-glutamyl transferase (GGT) were determined. The liver tissue was submitted to histopathological analysis, using a NAS score. In immunohistochemistry, we studied the expression of the insulin receptor, adiponectin, TNF-α and iNOS by tissue microarray method.Results and conclusion:There was marked cytoplasmic immunostaining for TNF-α and iNOS mediators in the group on a fat diet. Regarding insulin and adiponectin molecular markers, a reduction of cytoplasmic immunoreactivity of these antigens was observed in the group on a fat diet, reflecting, respectively, the state of hepatocellular inflammation (steatohepatitis) and insulin resistance in this experimental model of fat liver disease. |
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Immunohistochemistry pattern of hepatic inflammatory and insulin resistance markers in experimental model of nonalcoholic steatohepatitisnonalcoholic steatohepatitisnitric oxideadiponectinTNF-αiNOSimmunohistochemistryIntroduction:The pathophysiology of nonalcoholic steatohepatitis (NAS) includes, basically, insulin resistance, inflammation and oxidative stress. Thus, a study of immunostaining for liver insulin, adiponectin, tumor necrosis factor alpha (TNF-α), and inducible nitric oxide synthase (iNOS) receptors was conducted.Objective:To expand the knowledge about the pathophysiological and molecular mechanisms underlying the experimental model of steatohepatitis in rats fed a high-fat diet.Method:Twenty Wistar rats were divided into two groups: G1 (control, fed a standard diet), and G2 (fed a high-fat diet containing 58% of energy derived from fat, 18% from protein and 24% from carbohydrate). After eight weeks the animals were sacrificed. Blood glucose, insulin, total cholesterol, high-density lipoprotein (HDL), the very low-density lipoproteins (VLDL), triglycerides, aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP) and gamma-glutamyl transferase (GGT) were determined. The liver tissue was submitted to histopathological analysis, using a NAS score. In immunohistochemistry, we studied the expression of the insulin receptor, adiponectin, TNF-α and iNOS by tissue microarray method.Results and conclusion:There was marked cytoplasmic immunostaining for TNF-α and iNOS mediators in the group on a fat diet. Regarding insulin and adiponectin molecular markers, a reduction of cytoplasmic immunoreactivity of these antigens was observed in the group on a fat diet, reflecting, respectively, the state of hepatocellular inflammation (steatohepatitis) and insulin resistance in this experimental model of fat liver disease.Sociedade Brasileira de Patologia Clínica2014-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1676-24442014000200136Jornal Brasileiro de Patologia e Medicina Laboratorial v.50 n.2 2014reponame:Jornal Brasileiro de Patologia e Medicina Laboratorial (Online)instname:Sociedade Brasileira de Patologia (SBP)instacron:SBP10.5935/1676-2444.20140007info:eu-repo/semantics/openAccessHenriques,Mônica Souza de MirandaLeite,Jacqueline AlvesDiniz,Margareth de Fátima Formiga de MeloAraújo,Maria Salete Trigueiro deeng2015-10-26T00:00:00Zoai:scielo:S1676-24442014000200136Revistahttp://www.scielo.br/jbpmlhttps://old.scielo.br/oai/scielo-oai.php||jbpml@sbpc.org.br1678-47741676-2444opendoar:2015-10-26T00:00Jornal Brasileiro de Patologia e Medicina Laboratorial (Online) - Sociedade Brasileira de Patologia (SBP)false |
dc.title.none.fl_str_mv |
Immunohistochemistry pattern of hepatic inflammatory and insulin resistance markers in experimental model of nonalcoholic steatohepatitis |
title |
Immunohistochemistry pattern of hepatic inflammatory and insulin resistance markers in experimental model of nonalcoholic steatohepatitis |
spellingShingle |
Immunohistochemistry pattern of hepatic inflammatory and insulin resistance markers in experimental model of nonalcoholic steatohepatitis Henriques,Mônica Souza de Miranda nonalcoholic steatohepatitis nitric oxide adiponectin TNF-α iNOS immunohistochemistry |
title_short |
Immunohistochemistry pattern of hepatic inflammatory and insulin resistance markers in experimental model of nonalcoholic steatohepatitis |
title_full |
Immunohistochemistry pattern of hepatic inflammatory and insulin resistance markers in experimental model of nonalcoholic steatohepatitis |
title_fullStr |
Immunohistochemistry pattern of hepatic inflammatory and insulin resistance markers in experimental model of nonalcoholic steatohepatitis |
title_full_unstemmed |
Immunohistochemistry pattern of hepatic inflammatory and insulin resistance markers in experimental model of nonalcoholic steatohepatitis |
title_sort |
Immunohistochemistry pattern of hepatic inflammatory and insulin resistance markers in experimental model of nonalcoholic steatohepatitis |
author |
Henriques,Mônica Souza de Miranda |
author_facet |
Henriques,Mônica Souza de Miranda Leite,Jacqueline Alves Diniz,Margareth de Fátima Formiga de Melo Araújo,Maria Salete Trigueiro de |
author_role |
author |
author2 |
Leite,Jacqueline Alves Diniz,Margareth de Fátima Formiga de Melo Araújo,Maria Salete Trigueiro de |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Henriques,Mônica Souza de Miranda Leite,Jacqueline Alves Diniz,Margareth de Fátima Formiga de Melo Araújo,Maria Salete Trigueiro de |
dc.subject.por.fl_str_mv |
nonalcoholic steatohepatitis nitric oxide adiponectin TNF-α iNOS immunohistochemistry |
topic |
nonalcoholic steatohepatitis nitric oxide adiponectin TNF-α iNOS immunohistochemistry |
description |
Introduction:The pathophysiology of nonalcoholic steatohepatitis (NAS) includes, basically, insulin resistance, inflammation and oxidative stress. Thus, a study of immunostaining for liver insulin, adiponectin, tumor necrosis factor alpha (TNF-α), and inducible nitric oxide synthase (iNOS) receptors was conducted.Objective:To expand the knowledge about the pathophysiological and molecular mechanisms underlying the experimental model of steatohepatitis in rats fed a high-fat diet.Method:Twenty Wistar rats were divided into two groups: G1 (control, fed a standard diet), and G2 (fed a high-fat diet containing 58% of energy derived from fat, 18% from protein and 24% from carbohydrate). After eight weeks the animals were sacrificed. Blood glucose, insulin, total cholesterol, high-density lipoprotein (HDL), the very low-density lipoproteins (VLDL), triglycerides, aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase (ALP) and gamma-glutamyl transferase (GGT) were determined. The liver tissue was submitted to histopathological analysis, using a NAS score. In immunohistochemistry, we studied the expression of the insulin receptor, adiponectin, TNF-α and iNOS by tissue microarray method.Results and conclusion:There was marked cytoplasmic immunostaining for TNF-α and iNOS mediators in the group on a fat diet. Regarding insulin and adiponectin molecular markers, a reduction of cytoplasmic immunoreactivity of these antigens was observed in the group on a fat diet, reflecting, respectively, the state of hepatocellular inflammation (steatohepatitis) and insulin resistance in this experimental model of fat liver disease. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-04-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1676-24442014000200136 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1676-24442014000200136 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.5935/1676-2444.20140007 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Patologia Clínica |
publisher.none.fl_str_mv |
Sociedade Brasileira de Patologia Clínica |
dc.source.none.fl_str_mv |
Jornal Brasileiro de Patologia e Medicina Laboratorial v.50 n.2 2014 reponame:Jornal Brasileiro de Patologia e Medicina Laboratorial (Online) instname:Sociedade Brasileira de Patologia (SBP) instacron:SBP |
instname_str |
Sociedade Brasileira de Patologia (SBP) |
instacron_str |
SBP |
institution |
SBP |
reponame_str |
Jornal Brasileiro de Patologia e Medicina Laboratorial (Online) |
collection |
Jornal Brasileiro de Patologia e Medicina Laboratorial (Online) |
repository.name.fl_str_mv |
Jornal Brasileiro de Patologia e Medicina Laboratorial (Online) - Sociedade Brasileira de Patologia (SBP) |
repository.mail.fl_str_mv |
||jbpml@sbpc.org.br |
_version_ |
1752122295918264320 |