GPBAR1/TGR5 mediates bile acid-induced cytokine expression in murine Kupffer cells

GPBAR1/TGR5 is a novel plasma membrane-bound G protein-coupled bile acid (BA) receptor. BAs are known to induce the expression of inflammatory cytokines in the liver with unknown mechanism. Here we show that without other external stimuli, TGR5 activation alone induced the expression of interleukin...

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Veröffentlicht in:PloS one 2014-04, Vol.9 (4), p.e93567
Hauptverfasser: Lou, Guiyu, Ma, Xiaoxiao, Fu, Xianghui, Meng, Zhipeng, Zhang, Wenyu, Wang, Yan-Dong, Van Ness, Carl, Yu, Donna, Xu, Rongzhen, Huang, Wendong
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container_title PloS one
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creator Lou, Guiyu
Ma, Xiaoxiao
Fu, Xianghui
Meng, Zhipeng
Zhang, Wenyu
Wang, Yan-Dong
Van Ness, Carl
Yu, Donna
Xu, Rongzhen
Huang, Wendong
description GPBAR1/TGR5 is a novel plasma membrane-bound G protein-coupled bile acid (BA) receptor. BAs are known to induce the expression of inflammatory cytokines in the liver with unknown mechanism. Here we show that without other external stimuli, TGR5 activation alone induced the expression of interleukin 1β (IL-1β) and tumor necrosis factor-α (TNF-α) in murine macrophage cell line RAW264.7 or murine Kupffer cells. The TGR5-mediated increase of pro-inflammatory cytokine expression was suppressed by JNK inhibition. Moreover, the induced pro-inflammatory cytokine expression in mouse liver by 1% cholic acid (CA) diet was blunted in JNK-/- mice. TGR5 activation by its ligands enhanced the phosphorylation levels, DNA-binding and trans-activities of c-Jun and ATF2 transcription factors. Finally, the induced pro-inflammatory cytokine expression in Kupffer cells by TGR5 activation correlated with the suppression of Cholesterol 7α-hydroxylase (Cyp7a1) expression in murine hepatocytes. These results suggest that TGR5 mediates the BA-induced pro-inflammatory cytokine production in murine Kupffer cells through JNK-dependent pathway. This novel role of TGR5 may correlate to the suppression of Cyp7a1 expression in hepatocytes and contribute to the delicate BA feedback regulation.
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BAs are known to induce the expression of inflammatory cytokines in the liver with unknown mechanism. Here we show that without other external stimuli, TGR5 activation alone induced the expression of interleukin 1β (IL-1β) and tumor necrosis factor-α (TNF-α) in murine macrophage cell line RAW264.7 or murine Kupffer cells. The TGR5-mediated increase of pro-inflammatory cytokine expression was suppressed by JNK inhibition. Moreover, the induced pro-inflammatory cytokine expression in mouse liver by 1% cholic acid (CA) diet was blunted in JNK-/- mice. TGR5 activation by its ligands enhanced the phosphorylation levels, DNA-binding and trans-activities of c-Jun and ATF2 transcription factors. Finally, the induced pro-inflammatory cytokine expression in Kupffer cells by TGR5 activation correlated with the suppression of Cholesterol 7α-hydroxylase (Cyp7a1) expression in murine hepatocytes. These results suggest that TGR5 mediates the BA-induced pro-inflammatory cytokine production in murine Kupffer cells through JNK-dependent pathway. This novel role of TGR5 may correlate to the suppression of Cyp7a1 expression in hepatocytes and contribute to the delicate BA feedback regulation.</description><identifier>ISSN: 1932-6203</identifier><identifier>EISSN: 1932-6203</identifier><identifier>DOI: 10.1371/journal.pone.0093567</identifier><identifier>PMID: 24755711</identifier><language>eng</language><publisher>United States: Public Library of Science</publisher><subject>Acids ; Activating Transcription Factor 2 - metabolism ; Activation ; Analysis ; Animals ; Bile ; Bile Acids and Salts - pharmacology ; Biology and Life Sciences ; c-Jun protein ; Cell Line ; Chemical properties ; Cholesterol ; Cholesterol 7-alpha-Hydroxylase - genetics ; Cholesterol 7-alpha-Hydroxylase - metabolism ; Cholic acid ; Culture Media - pharmacology ; Cytokines ; Cytokines - genetics ; Cytokines - metabolism ; Deoxycholic acid ; Deoxyribonucleic acid ; DNA ; External stimuli ; G proteins ; Gene Expression Regulation - drug effects ; HEK293 Cells ; Hepatocytes ; Hepatocytes - drug effects ; Hepatocytes - enzymology ; Humans ; Hydroxylase ; IL-1β ; Inflammation ; Inflammation Mediators - metabolism ; Interleukins ; JNK Mitogen-Activated Protein Kinases - metabolism ; Kinases ; Kupffer cells ; Kupffer Cells - drug effects ; Kupffer Cells - metabolism ; Liver ; Liver - cytology ; Liver - enzymology ; Macrophages ; Membrane proteins ; Mice, Inbred C57BL ; Oleanolic Acid - pharmacology ; Phosphorylation ; Phosphorylation - drug effects ; Promoter Regions, Genetic - genetics ; Protein binding ; Proto-Oncogene Proteins c-jun - metabolism ; Receptors, G-Protein-Coupled - metabolism ; Research and Analysis Methods ; Rodents ; Transcription factors ; Tumor necrosis factor ; Tumor Necrosis Factor-alpha - genetics ; Tumor necrosis factor-TNF ; Tumor necrosis factor-α</subject><ispartof>PloS one, 2014-04, Vol.9 (4), p.e93567</ispartof><rights>COPYRIGHT 2014 Public Library of Science</rights><rights>2014 Lou et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License: http://creativecommons.org/licenses/by/4.0/ (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.</rights><rights>2014 Lou et al 2014 Lou et al</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c758t-af895bb70d44d06362966d00bf3d149f66b1a4c03e6918eec1656fac737d6783</citedby><cites>FETCH-LOGICAL-c758t-af895bb70d44d06362966d00bf3d149f66b1a4c03e6918eec1656fac737d6783</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC3995640/pdf/$$EPDF$$P50$$Gpubmedcentral$$Hfree_for_read</linktopdf><linktohtml>$$Uhttps://www.ncbi.nlm.nih.gov/pmc/articles/PMC3995640/$$EHTML$$P50$$Gpubmedcentral$$Hfree_for_read</linktohtml><link.rule.ids>230,314,723,776,780,860,881,2096,2915,23845,27901,27902,53766,53768,79342,79343</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/24755711$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Lou, Guiyu</creatorcontrib><creatorcontrib>Ma, Xiaoxiao</creatorcontrib><creatorcontrib>Fu, Xianghui</creatorcontrib><creatorcontrib>Meng, Zhipeng</creatorcontrib><creatorcontrib>Zhang, Wenyu</creatorcontrib><creatorcontrib>Wang, Yan-Dong</creatorcontrib><creatorcontrib>Van Ness, Carl</creatorcontrib><creatorcontrib>Yu, Donna</creatorcontrib><creatorcontrib>Xu, Rongzhen</creatorcontrib><creatorcontrib>Huang, Wendong</creatorcontrib><title>GPBAR1/TGR5 mediates bile acid-induced cytokine expression in murine Kupffer cells</title><title>PloS one</title><addtitle>PLoS One</addtitle><description>GPBAR1/TGR5 is a novel plasma membrane-bound G protein-coupled bile acid (BA) receptor. BAs are known to induce the expression of inflammatory cytokines in the liver with unknown mechanism. Here we show that without other external stimuli, TGR5 activation alone induced the expression of interleukin 1β (IL-1β) and tumor necrosis factor-α (TNF-α) in murine macrophage cell line RAW264.7 or murine Kupffer cells. The TGR5-mediated increase of pro-inflammatory cytokine expression was suppressed by JNK inhibition. Moreover, the induced pro-inflammatory cytokine expression in mouse liver by 1% cholic acid (CA) diet was blunted in JNK-/- mice. TGR5 activation by its ligands enhanced the phosphorylation levels, DNA-binding and trans-activities of c-Jun and ATF2 transcription factors. Finally, the induced pro-inflammatory cytokine expression in Kupffer cells by TGR5 activation correlated with the suppression of Cholesterol 7α-hydroxylase (Cyp7a1) expression in murine hepatocytes. These results suggest that TGR5 mediates the BA-induced pro-inflammatory cytokine production in murine Kupffer cells through JNK-dependent pathway. This novel role of TGR5 may correlate to the suppression of Cyp7a1 expression in hepatocytes and contribute to the delicate BA feedback regulation.</description><subject>Acids</subject><subject>Activating Transcription Factor 2 - metabolism</subject><subject>Activation</subject><subject>Analysis</subject><subject>Animals</subject><subject>Bile</subject><subject>Bile Acids and Salts - pharmacology</subject><subject>Biology and Life Sciences</subject><subject>c-Jun protein</subject><subject>Cell Line</subject><subject>Chemical properties</subject><subject>Cholesterol</subject><subject>Cholesterol 7-alpha-Hydroxylase - genetics</subject><subject>Cholesterol 7-alpha-Hydroxylase - metabolism</subject><subject>Cholic acid</subject><subject>Culture Media - pharmacology</subject><subject>Cytokines</subject><subject>Cytokines - genetics</subject><subject>Cytokines - metabolism</subject><subject>Deoxycholic acid</subject><subject>Deoxyribonucleic acid</subject><subject>DNA</subject><subject>External stimuli</subject><subject>G proteins</subject><subject>Gene Expression Regulation - drug effects</subject><subject>HEK293 Cells</subject><subject>Hepatocytes</subject><subject>Hepatocytes - drug effects</subject><subject>Hepatocytes - enzymology</subject><subject>Humans</subject><subject>Hydroxylase</subject><subject>IL-1β</subject><subject>Inflammation</subject><subject>Inflammation Mediators - metabolism</subject><subject>Interleukins</subject><subject>JNK Mitogen-Activated Protein Kinases - metabolism</subject><subject>Kinases</subject><subject>Kupffer cells</subject><subject>Kupffer Cells - drug effects</subject><subject>Kupffer Cells - metabolism</subject><subject>Liver</subject><subject>Liver - cytology</subject><subject>Liver - enzymology</subject><subject>Macrophages</subject><subject>Membrane proteins</subject><subject>Mice, Inbred C57BL</subject><subject>Oleanolic Acid - pharmacology</subject><subject>Phosphorylation</subject><subject>Phosphorylation - drug effects</subject><subject>Promoter Regions, Genetic - genetics</subject><subject>Protein binding</subject><subject>Proto-Oncogene Proteins c-jun - metabolism</subject><subject>Receptors, G-Protein-Coupled - metabolism</subject><subject>Research and Analysis Methods</subject><subject>Rodents</subject><subject>Transcription factors</subject><subject>Tumor necrosis factor</subject><subject>Tumor Necrosis Factor-alpha - genetics</subject><subject>Tumor necrosis factor-TNF</subject><subject>Tumor necrosis factor-α</subject><issn>1932-6203</issn><issn>1932-6203</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2014</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><sourceid>BENPR</sourceid><sourceid>DOA</sourceid><recordid>eNqNkl2L1DAUhoso7rr6D0QLguBFZ_PRfPRGGBcdBxdWxsHbkOZjJmOnqUkru__ejNNdpqAguUhInvPm8J43y15CMIOYwcudH0Irm1nnWzMDoMKEskfZOawwKigC-PHJ-Sx7FuMOAII5pU-zM1QyQhiE59lq8fXDfAUv14sVyfdGO9mbmNeuMblUTheu1YMyOld3vf_hWpOb2y6YGJ1vc9fm-yEcLr8MnbUm5Mo0TXyePbGyiebFuF9k608f11efi-ubxfJqfl0oRnhfSMsrUtcM6LLUgGKKKko1ALXFGpaVpbSGslQAG1pBboyClFArFcNMU8bxRfb6KNs1PorRjSgggbxkgDGUiOWR0F7uRBfcXoY74aUTfy582AgZeqcaI6jkWlcWEU5RiSTglFUo_U04UARpmLTej78NdbJJmbYPspmITl9atxUb_0vgqiK0BEngzSgQ_M_BxP4fLY_URqauXGt9ElN7F5WY4zQzjjgtEzX7C5WWNnunUh5smt-04N2kIDG9ue03cohRLL-t_p-9-T5l356wWyObfht9M_QpHnEKlkdQBR9jMPbBOQjEIc73bohDnMUY51T26tT1h6L7_OLfP4Ttwg</recordid><startdate>20140401</startdate><enddate>20140401</enddate><creator>Lou, Guiyu</creator><creator>Ma, Xiaoxiao</creator><creator>Fu, Xianghui</creator><creator>Meng, Zhipeng</creator><creator>Zhang, Wenyu</creator><creator>Wang, Yan-Dong</creator><creator>Van Ness, Carl</creator><creator>Yu, Donna</creator><creator>Xu, Rongzhen</creator><creator>Huang, Wendong</creator><general>Public Library of Science</general><general>Public Library of Science (PLoS)</general><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>IOV</scope><scope>ISR</scope><scope>3V.</scope><scope>7QG</scope><scope>7QL</scope><scope>7QO</scope><scope>7RV</scope><scope>7SN</scope><scope>7SS</scope><scope>7T5</scope><scope>7TG</scope><scope>7TM</scope><scope>7U9</scope><scope>7X2</scope><scope>7X7</scope><scope>7XB</scope><scope>88E</scope><scope>8AO</scope><scope>8C1</scope><scope>8FD</scope><scope>8FE</scope><scope>8FG</scope><scope>8FH</scope><scope>8FI</scope><scope>8FJ</scope><scope>8FK</scope><scope>ABJCF</scope><scope>ABUWG</scope><scope>AEUYN</scope><scope>AFKRA</scope><scope>ARAPS</scope><scope>ATCPS</scope><scope>AZQEC</scope><scope>BBNVY</scope><scope>BENPR</scope><scope>BGLVJ</scope><scope>BHPHI</scope><scope>C1K</scope><scope>CCPQU</scope><scope>D1I</scope><scope>DWQXO</scope><scope>FR3</scope><scope>FYUFA</scope><scope>GHDGH</scope><scope>GNUQQ</scope><scope>H94</scope><scope>HCIFZ</scope><scope>K9.</scope><scope>KB.</scope><scope>KB0</scope><scope>KL.</scope><scope>L6V</scope><scope>LK8</scope><scope>M0K</scope><scope>M0S</scope><scope>M1P</scope><scope>M7N</scope><scope>M7P</scope><scope>M7S</scope><scope>NAPCQ</scope><scope>P5Z</scope><scope>P62</scope><scope>P64</scope><scope>PATMY</scope><scope>PDBOC</scope><scope>PIMPY</scope><scope>PQEST</scope><scope>PQQKQ</scope><scope>PQUKI</scope><scope>PTHSS</scope><scope>PYCSY</scope><scope>RC3</scope><scope>5PM</scope><scope>DOA</scope></search><sort><creationdate>20140401</creationdate><title>GPBAR1/TGR5 mediates bile acid-induced cytokine expression in murine Kupffer cells</title><author>Lou, Guiyu ; Ma, Xiaoxiao ; Fu, Xianghui ; Meng, Zhipeng ; Zhang, Wenyu ; Wang, Yan-Dong ; Van Ness, Carl ; Yu, Donna ; Xu, Rongzhen ; Huang, Wendong</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c758t-af895bb70d44d06362966d00bf3d149f66b1a4c03e6918eec1656fac737d6783</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2014</creationdate><topic>Acids</topic><topic>Activating Transcription Factor 2 - metabolism</topic><topic>Activation</topic><topic>Analysis</topic><topic>Animals</topic><topic>Bile</topic><topic>Bile Acids and Salts - pharmacology</topic><topic>Biology and Life Sciences</topic><topic>c-Jun protein</topic><topic>Cell Line</topic><topic>Chemical properties</topic><topic>Cholesterol</topic><topic>Cholesterol 7-alpha-Hydroxylase - genetics</topic><topic>Cholesterol 7-alpha-Hydroxylase - metabolism</topic><topic>Cholic acid</topic><topic>Culture Media - pharmacology</topic><topic>Cytokines</topic><topic>Cytokines - genetics</topic><topic>Cytokines - metabolism</topic><topic>Deoxycholic acid</topic><topic>Deoxyribonucleic acid</topic><topic>DNA</topic><topic>External stimuli</topic><topic>G proteins</topic><topic>Gene Expression Regulation - drug effects</topic><topic>HEK293 Cells</topic><topic>Hepatocytes</topic><topic>Hepatocytes - drug effects</topic><topic>Hepatocytes - enzymology</topic><topic>Humans</topic><topic>Hydroxylase</topic><topic>IL-1β</topic><topic>Inflammation</topic><topic>Inflammation Mediators - 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BAs are known to induce the expression of inflammatory cytokines in the liver with unknown mechanism. Here we show that without other external stimuli, TGR5 activation alone induced the expression of interleukin 1β (IL-1β) and tumor necrosis factor-α (TNF-α) in murine macrophage cell line RAW264.7 or murine Kupffer cells. The TGR5-mediated increase of pro-inflammatory cytokine expression was suppressed by JNK inhibition. Moreover, the induced pro-inflammatory cytokine expression in mouse liver by 1% cholic acid (CA) diet was blunted in JNK-/- mice. TGR5 activation by its ligands enhanced the phosphorylation levels, DNA-binding and trans-activities of c-Jun and ATF2 transcription factors. Finally, the induced pro-inflammatory cytokine expression in Kupffer cells by TGR5 activation correlated with the suppression of Cholesterol 7α-hydroxylase (Cyp7a1) expression in murine hepatocytes. These results suggest that TGR5 mediates the BA-induced pro-inflammatory cytokine production in murine Kupffer cells through JNK-dependent pathway. This novel role of TGR5 may correlate to the suppression of Cyp7a1 expression in hepatocytes and contribute to the delicate BA feedback regulation.</abstract><cop>United States</cop><pub>Public Library of Science</pub><pmid>24755711</pmid><doi>10.1371/journal.pone.0093567</doi><oa>free_for_read</oa></addata></record>
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subjects Acids
Activating Transcription Factor 2 - metabolism
Activation
Analysis
Animals
Bile
Bile Acids and Salts - pharmacology
Biology and Life Sciences
c-Jun protein
Cell Line
Chemical properties
Cholesterol
Cholesterol 7-alpha-Hydroxylase - genetics
Cholesterol 7-alpha-Hydroxylase - metabolism
Cholic acid
Culture Media - pharmacology
Cytokines
Cytokines - genetics
Cytokines - metabolism
Deoxycholic acid
Deoxyribonucleic acid
DNA
External stimuli
G proteins
Gene Expression Regulation - drug effects
HEK293 Cells
Hepatocytes
Hepatocytes - drug effects
Hepatocytes - enzymology
Humans
Hydroxylase
IL-1β
Inflammation
Inflammation Mediators - metabolism
Interleukins
JNK Mitogen-Activated Protein Kinases - metabolism
Kinases
Kupffer cells
Kupffer Cells - drug effects
Kupffer Cells - metabolism
Liver
Liver - cytology
Liver - enzymology
Macrophages
Membrane proteins
Mice, Inbred C57BL
Oleanolic Acid - pharmacology
Phosphorylation
Phosphorylation - drug effects
Promoter Regions, Genetic - genetics
Protein binding
Proto-Oncogene Proteins c-jun - metabolism
Receptors, G-Protein-Coupled - metabolism
Research and Analysis Methods
Rodents
Transcription factors
Tumor necrosis factor
Tumor Necrosis Factor-alpha - genetics
Tumor necrosis factor-TNF
Tumor necrosis factor-α
title GPBAR1/TGR5 mediates bile acid-induced cytokine expression in murine Kupffer cells
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