Histone acetylation and steroid receptor coactivator expression during clofibrate‐induced rat hepatocarcinogenesis

Peroxisome proliferators (PPs), non‐genotoxic rodent carcinogens, cause the induction of the peroxisomal fatty acid β‐oxidation system, including bifunctional enzyme (BE) and 3‐ketoacyl‐CoA thiolase (TH), in the liver. GST M1 gene is polymorphic in Sprague–Dawley rats, NC‐ and KS‐type. The KS‐type r...

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Veröffentlicht in:Cancer science 2010-04, Vol.101 (4), p.869-875
Hauptverfasser: Asano, Jumpei, Kudo, Toshihiro, Shimizu, Takeshi, Fan, Yang, Nanashima, Naoki, Yamana, Daisuke, Miura, Takuya, Yamada, Toshiyuki, Tsuchida, Shigeki
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container_issue 4
container_start_page 869
container_title Cancer science
container_volume 101
creator Asano, Jumpei
Kudo, Toshihiro
Shimizu, Takeshi
Fan, Yang
Nanashima, Naoki
Yamana, Daisuke
Miura, Takuya
Yamada, Toshiyuki
Tsuchida, Shigeki
description Peroxisome proliferators (PPs), non‐genotoxic rodent carcinogens, cause the induction of the peroxisomal fatty acid β‐oxidation system, including bifunctional enzyme (BE) and 3‐ketoacyl‐CoA thiolase (TH), in the liver. GST M1 gene is polymorphic in Sprague–Dawley rats, NC‐ and KS‐type. The KS‐type rats showed enhanced susceptibility to ethyl‐α‐chlorophenoxyisobutyrate (clofibrate, CF), one of the PPs. The degree of BE induction was higher in the KS‐type and preneoplastic foci developed after 6–8 weeks of treatment, whereas no foci developed in the NC‐type. In the preset study, factors involved in different BE inducibility were investigated. There were no differences in hepatic peroxisome proliferator‐activated receptor (PPAR) α levels between them. Among various coactivators for PPARα, only steroid receptor coactivator (SRC)‐3 level was higher in the KS‐type. To investigate the association between PPARα and SRC‐3 or other proteins, nuclear extracts from CF‐treated livers were applied to a PPARα column. In the KS‐type, 110, 72, and 42 kDa proteins were bound and these were identified as SRC‐3, BE, and TH, respectively. EMSA supported the binding of these proteins to PPARα associated to the BE enhancer in CF‐treated KS‐type, but not in the NC‐type. Histone H3 acetylation was increased 11‐fold in the KS‐type by CF treatment but not in the NC‐type. As BE and TH are responsible for acetyl‐CoA production and SRC‐3 possesses a histone acetyltransferase activity, these results suggest that enhanced BE induction in the KS‐type livers is due to acetylation‐mediated transcriptional activation and epigenetic mechanisms might be involved in CF‐induced rat hepatocarcinogenesis. (Cancer Sci 2010; 101: 876–875)
doi_str_mv 10.1111/j.1349-7006.2009.01460.x
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GST M1 gene is polymorphic in Sprague–Dawley rats, NC‐ and KS‐type. The KS‐type rats showed enhanced susceptibility to ethyl‐α‐chlorophenoxyisobutyrate (clofibrate, CF), one of the PPs. The degree of BE induction was higher in the KS‐type and preneoplastic foci developed after 6–8 weeks of treatment, whereas no foci developed in the NC‐type. In the preset study, factors involved in different BE inducibility were investigated. There were no differences in hepatic peroxisome proliferator‐activated receptor (PPAR) α levels between them. Among various coactivators for PPARα, only steroid receptor coactivator (SRC)‐3 level was higher in the KS‐type. To investigate the association between PPARα and SRC‐3 or other proteins, nuclear extracts from CF‐treated livers were applied to a PPARα column. In the KS‐type, 110, 72, and 42 kDa proteins were bound and these were identified as SRC‐3, BE, and TH, respectively. EMSA supported the binding of these proteins to PPARα associated to the BE enhancer in CF‐treated KS‐type, but not in the NC‐type. Histone H3 acetylation was increased 11‐fold in the KS‐type by CF treatment but not in the NC‐type. As BE and TH are responsible for acetyl‐CoA production and SRC‐3 possesses a histone acetyltransferase activity, these results suggest that enhanced BE induction in the KS‐type livers is due to acetylation‐mediated transcriptional activation and epigenetic mechanisms might be involved in CF‐induced rat hepatocarcinogenesis. (Cancer Sci 2010; 101: 876–875)</description><identifier>ISSN: 1347-9032</identifier><identifier>ISSN: 1349-7006</identifier><identifier>EISSN: 1349-7006</identifier><identifier>DOI: 10.1111/j.1349-7006.2009.01460.x</identifier><identifier>PMID: 20132223</identifier><language>eng</language><publisher>Oxford, UK: Blackwell Publishing Ltd</publisher><subject>Acetyl Coenzyme A - genetics ; Acetyl Coenzyme A - metabolism ; Acetyl Coenzyme A - pharmacology ; Acetyl-CoA C-Acetyltransferase - genetics ; Acetyl-CoA C-Acetyltransferase - metabolism ; Acetylation ; Animals ; Antibodies ; Biological and medical sciences ; Carcinogens ; Cell Transformation, Neoplastic - genetics ; Cell Transformation, Neoplastic - metabolism ; Clofibrate ; Enzyme Induction ; Enzymes ; Epigenetics ; Fatty acids ; Fatty Acids - genetics ; Fatty Acids - metabolism ; Fatty Acids - pharmacology ; Gastroenterology. Liver. Pancreas. Abdomen ; Genes ; Genotoxicity ; Histone acetyltransferase ; Histone H3 ; Histones - genetics ; Histones - metabolism ; Histones - pharmacology ; Liver ; Liver - drug effects ; Liver - enzymology ; Liver - metabolism ; Liver Neoplasms, Experimental - chemically induced ; Liver Neoplasms, Experimental - metabolism ; Liver. Biliary tract. Portal circulation. Exocrine pancreas ; Male ; Medical sciences ; Nuclear Receptor Coactivator 3 - metabolism ; Original ; Oxidation ; Peptides ; Peroxisome proliferator-activated receptors ; Peroxisome Proliferators - metabolism ; Peroxisome Proliferators - pharmacology ; Polymorphism, Genetic ; PPAR alpha - genetics ; PPAR alpha - metabolism ; PPAR alpha - pharmacology ; Proteins ; Rats ; Rats, Sprague-Dawley ; Receptors, Steroid - genetics ; Receptors, Steroid - metabolism ; Steroids ; Thiolase ; Transcription activation ; Tumors</subject><ispartof>Cancer science, 2010-04, Vol.101 (4), p.869-875</ispartof><rights>2010 Japanese Cancer Association</rights><rights>2015 INIST-CNRS</rights><rights>Copyright John Wiley &amp; Sons, Inc. 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GST M1 gene is polymorphic in Sprague–Dawley rats, NC‐ and KS‐type. The KS‐type rats showed enhanced susceptibility to ethyl‐α‐chlorophenoxyisobutyrate (clofibrate, CF), one of the PPs. The degree of BE induction was higher in the KS‐type and preneoplastic foci developed after 6–8 weeks of treatment, whereas no foci developed in the NC‐type. In the preset study, factors involved in different BE inducibility were investigated. There were no differences in hepatic peroxisome proliferator‐activated receptor (PPAR) α levels between them. Among various coactivators for PPARα, only steroid receptor coactivator (SRC)‐3 level was higher in the KS‐type. To investigate the association between PPARα and SRC‐3 or other proteins, nuclear extracts from CF‐treated livers were applied to a PPARα column. In the KS‐type, 110, 72, and 42 kDa proteins were bound and these were identified as SRC‐3, BE, and TH, respectively. EMSA supported the binding of these proteins to PPARα associated to the BE enhancer in CF‐treated KS‐type, but not in the NC‐type. Histone H3 acetylation was increased 11‐fold in the KS‐type by CF treatment but not in the NC‐type. As BE and TH are responsible for acetyl‐CoA production and SRC‐3 possesses a histone acetyltransferase activity, these results suggest that enhanced BE induction in the KS‐type livers is due to acetylation‐mediated transcriptional activation and epigenetic mechanisms might be involved in CF‐induced rat hepatocarcinogenesis. (Cancer Sci 2010; 101: 876–875)</description><subject>Acetyl Coenzyme A - genetics</subject><subject>Acetyl Coenzyme A - metabolism</subject><subject>Acetyl Coenzyme A - pharmacology</subject><subject>Acetyl-CoA C-Acetyltransferase - genetics</subject><subject>Acetyl-CoA C-Acetyltransferase - metabolism</subject><subject>Acetylation</subject><subject>Animals</subject><subject>Antibodies</subject><subject>Biological and medical sciences</subject><subject>Carcinogens</subject><subject>Cell Transformation, Neoplastic - genetics</subject><subject>Cell Transformation, Neoplastic - metabolism</subject><subject>Clofibrate</subject><subject>Enzyme Induction</subject><subject>Enzymes</subject><subject>Epigenetics</subject><subject>Fatty acids</subject><subject>Fatty Acids - genetics</subject><subject>Fatty Acids - metabolism</subject><subject>Fatty Acids - pharmacology</subject><subject>Gastroenterology. Liver. Pancreas. Abdomen</subject><subject>Genes</subject><subject>Genotoxicity</subject><subject>Histone acetyltransferase</subject><subject>Histone H3</subject><subject>Histones - genetics</subject><subject>Histones - metabolism</subject><subject>Histones - pharmacology</subject><subject>Liver</subject><subject>Liver - drug effects</subject><subject>Liver - enzymology</subject><subject>Liver - metabolism</subject><subject>Liver Neoplasms, Experimental - chemically induced</subject><subject>Liver Neoplasms, Experimental - metabolism</subject><subject>Liver. Biliary tract. Portal circulation. 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GST M1 gene is polymorphic in Sprague–Dawley rats, NC‐ and KS‐type. The KS‐type rats showed enhanced susceptibility to ethyl‐α‐chlorophenoxyisobutyrate (clofibrate, CF), one of the PPs. The degree of BE induction was higher in the KS‐type and preneoplastic foci developed after 6–8 weeks of treatment, whereas no foci developed in the NC‐type. In the preset study, factors involved in different BE inducibility were investigated. There were no differences in hepatic peroxisome proliferator‐activated receptor (PPAR) α levels between them. Among various coactivators for PPARα, only steroid receptor coactivator (SRC)‐3 level was higher in the KS‐type. To investigate the association between PPARα and SRC‐3 or other proteins, nuclear extracts from CF‐treated livers were applied to a PPARα column. In the KS‐type, 110, 72, and 42 kDa proteins were bound and these were identified as SRC‐3, BE, and TH, respectively. EMSA supported the binding of these proteins to PPARα associated to the BE enhancer in CF‐treated KS‐type, but not in the NC‐type. Histone H3 acetylation was increased 11‐fold in the KS‐type by CF treatment but not in the NC‐type. As BE and TH are responsible for acetyl‐CoA production and SRC‐3 possesses a histone acetyltransferase activity, these results suggest that enhanced BE induction in the KS‐type livers is due to acetylation‐mediated transcriptional activation and epigenetic mechanisms might be involved in CF‐induced rat hepatocarcinogenesis. (Cancer Sci 2010; 101: 876–875)</abstract><cop>Oxford, UK</cop><pub>Blackwell Publishing Ltd</pub><pmid>20132223</pmid><doi>10.1111/j.1349-7006.2009.01460.x</doi><tpages>7</tpages><oa>free_for_read</oa></addata></record>
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source Wiley Online Library Open Access
subjects Acetyl Coenzyme A - genetics
Acetyl Coenzyme A - metabolism
Acetyl Coenzyme A - pharmacology
Acetyl-CoA C-Acetyltransferase - genetics
Acetyl-CoA C-Acetyltransferase - metabolism
Acetylation
Animals
Antibodies
Biological and medical sciences
Carcinogens
Cell Transformation, Neoplastic - genetics
Cell Transformation, Neoplastic - metabolism
Clofibrate
Enzyme Induction
Enzymes
Epigenetics
Fatty acids
Fatty Acids - genetics
Fatty Acids - metabolism
Fatty Acids - pharmacology
Gastroenterology. Liver. Pancreas. Abdomen
Genes
Genotoxicity
Histone acetyltransferase
Histone H3
Histones - genetics
Histones - metabolism
Histones - pharmacology
Liver
Liver - drug effects
Liver - enzymology
Liver - metabolism
Liver Neoplasms, Experimental - chemically induced
Liver Neoplasms, Experimental - metabolism
Liver. Biliary tract. Portal circulation. Exocrine pancreas
Male
Medical sciences
Nuclear Receptor Coactivator 3 - metabolism
Original
Oxidation
Peptides
Peroxisome proliferator-activated receptors
Peroxisome Proliferators - metabolism
Peroxisome Proliferators - pharmacology
Polymorphism, Genetic
PPAR alpha - genetics
PPAR alpha - metabolism
PPAR alpha - pharmacology
Proteins
Rats
Rats, Sprague-Dawley
Receptors, Steroid - genetics
Receptors, Steroid - metabolism
Steroids
Thiolase
Transcription activation
Tumors
title Histone acetylation and steroid receptor coactivator expression during clofibrate‐induced rat hepatocarcinogenesis
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