Sympathetic Nerve Activity Maintains an Anti-Inflammatory State in Adipose Tissue in Male Mice by Inhibiting TNF-α Gene Expression in Macrophages

Adipose tissue macrophages (ATMs) play an important role in the inflammatory response in obese animals. How ATMs are regulated in lean animals has remained elusive, however. We now show that the sympathetic nervous system (SNS) is necessary to maintain the abundance of the mRNA for the proinflammato...

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Veröffentlicht in:Endocrinology (Philadelphia) 2015-10, Vol.156 (10), p.3680-3694
Hauptverfasser: Tang, Lijun, Okamoto, Shiki, Shiuchi, Tetsuya, Toda, Chitoku, Takagi, Kazuyo, Sato, Tatsuya, Saito, Kumiko, Yokota, Shigefumi, Minokoshi, Yasuhiko
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container_issue 10
container_start_page 3680
container_title Endocrinology (Philadelphia)
container_volume 156
creator Tang, Lijun
Okamoto, Shiki
Shiuchi, Tetsuya
Toda, Chitoku
Takagi, Kazuyo
Sato, Tatsuya
Saito, Kumiko
Yokota, Shigefumi
Minokoshi, Yasuhiko
description Adipose tissue macrophages (ATMs) play an important role in the inflammatory response in obese animals. How ATMs are regulated in lean animals has remained elusive, however. We now show that the sympathetic nervous system (SNS) is necessary to maintain the abundance of the mRNA for the proinflammatory cytokine TNF-α at a low level in ATMs of lean mice. Intracerebroventricular injection of agouti-related neuropeptide increased the amount of TNF-α mRNA in epididymal (epi) white adipose tissue (WAT), but not in interscapular brown adipose tissue (BAT), through inhibition of sympathetic nerve activity in epiWAT. The surgical denervation and β-adrenergic antagonist propranolol up-regulated TNF-α mRNA in both epiWAT and BAT in vivo. Signaling by the β2-adrenergic receptor (AR) and protein kinase A down-regulated TNF-α mRNA in epiWAT explants and suppressed lipopolysaccharide-induced up-regulation of TNF-α mRNA in the stromal vascular fraction of this tissue. β-AR-deficient (β-less) mice manifested an increased plasma TNF-α concentration and increased TNF-α mRNA abundance in epiWAT and BAT. TNF-α mRNA abundance was greater in ATMs (CD11b+ cells of the stromal vascular fraction) from epiWAT or BAT of wild-type mice than in corresponding CD11b− cells, and β2-AR mRNA abundance was greater in ATMs than in CD11b− cells of epiWAT. Our results show that the SNS and β2-AR-protein kinase A pathway maintain an anti-inflammatory state in ATMs of lean mice in vivo, and that the brain melanocortin pathway plays a role in maintaining this state in WAT of lean mice via the SNS.
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How ATMs are regulated in lean animals has remained elusive, however. We now show that the sympathetic nervous system (SNS) is necessary to maintain the abundance of the mRNA for the proinflammatory cytokine TNF-α at a low level in ATMs of lean mice. Intracerebroventricular injection of agouti-related neuropeptide increased the amount of TNF-α mRNA in epididymal (epi) white adipose tissue (WAT), but not in interscapular brown adipose tissue (BAT), through inhibition of sympathetic nerve activity in epiWAT. The surgical denervation and β-adrenergic antagonist propranolol up-regulated TNF-α mRNA in both epiWAT and BAT in vivo. Signaling by the β2-adrenergic receptor (AR) and protein kinase A down-regulated TNF-α mRNA in epiWAT explants and suppressed lipopolysaccharide-induced up-regulation of TNF-α mRNA in the stromal vascular fraction of this tissue. β-AR-deficient (β-less) mice manifested an increased plasma TNF-α concentration and increased TNF-α mRNA abundance in epiWAT and BAT. TNF-α mRNA abundance was greater in ATMs (CD11b+ cells of the stromal vascular fraction) from epiWAT or BAT of wild-type mice than in corresponding CD11b− cells, and β2-AR mRNA abundance was greater in ATMs than in CD11b− cells of epiWAT. 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Okamoto, Shiki ; Shiuchi, Tetsuya ; Toda, Chitoku ; Takagi, Kazuyo ; Sato, Tatsuya ; Saito, Kumiko ; Yokota, Shigefumi ; Minokoshi, Yasuhiko</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c476t-827b3e8b6920576675e892d6bd2078bacf561ef62f5cfb43f91fa94a09782ba63</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2015</creationdate><topic>Abundance</topic><topic>Adipose tissue</topic><topic>Adipose tissue (brown)</topic><topic>Adipose Tissue, Brown - drug effects</topic><topic>Adipose Tissue, Brown - innervation</topic><topic>Adipose Tissue, Brown - metabolism</topic><topic>Adipose Tissue, White - drug effects</topic><topic>Adipose Tissue, White - innervation</topic><topic>Adipose Tissue, White - metabolism</topic><topic>Adrenergic beta-Antagonists - pharmacology</topic><topic>Adrenergic receptors</topic><topic>Agouti-Related Protein - administration &amp; dosage</topic><topic>Animals</topic><topic>Body fat</topic><topic>CD11b antigen</topic><topic>Cell Line</topic><topic>Denervation</topic><topic>Epididymis - drug effects</topic><topic>Epididymis - metabolism</topic><topic>Explants</topic><topic>Gene expression</topic><topic>Gene Expression - drug effects</topic><topic>Immunoblotting</topic><topic>Inflammation</topic><topic>Inflammation Mediators - metabolism</topic><topic>Inflammatory response</topic><topic>Injections, Intraventricular</topic><topic>Intracerebroventricular administration</topic><topic>Kinases</topic><topic>Lipopolysaccharides</topic><topic>Low level</topic><topic>Macrophages</topic><topic>Macrophages - metabolism</topic><topic>Male</topic><topic>Melanocortin</topic><topic>Mice, Inbred C57BL</topic><topic>Mice, Knockout</topic><topic>Nerves</topic><topic>Peptide Fragments - administration &amp; 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How ATMs are regulated in lean animals has remained elusive, however. We now show that the sympathetic nervous system (SNS) is necessary to maintain the abundance of the mRNA for the proinflammatory cytokine TNF-α at a low level in ATMs of lean mice. Intracerebroventricular injection of agouti-related neuropeptide increased the amount of TNF-α mRNA in epididymal (epi) white adipose tissue (WAT), but not in interscapular brown adipose tissue (BAT), through inhibition of sympathetic nerve activity in epiWAT. The surgical denervation and β-adrenergic antagonist propranolol up-regulated TNF-α mRNA in both epiWAT and BAT in vivo. Signaling by the β2-adrenergic receptor (AR) and protein kinase A down-regulated TNF-α mRNA in epiWAT explants and suppressed lipopolysaccharide-induced up-regulation of TNF-α mRNA in the stromal vascular fraction of this tissue. β-AR-deficient (β-less) mice manifested an increased plasma TNF-α concentration and increased TNF-α mRNA abundance in epiWAT and BAT. TNF-α mRNA abundance was greater in ATMs (CD11b+ cells of the stromal vascular fraction) from epiWAT or BAT of wild-type mice than in corresponding CD11b− cells, and β2-AR mRNA abundance was greater in ATMs than in CD11b− cells of epiWAT. Our results show that the SNS and β2-AR-protein kinase A pathway maintain an anti-inflammatory state in ATMs of lean mice in vivo, and that the brain melanocortin pathway plays a role in maintaining this state in WAT of lean mice via the SNS.</abstract><cop>United States</cop><pub>Endocrine Society</pub><pmid>26132918</pmid><doi>10.1210/EN.2015-1096</doi><tpages>15</tpages><oa>free_for_read</oa></addata></record>
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source Oxford University Press Journals All Titles (1996-Current); MEDLINE; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; Alma/SFX Local Collection; Journals@Ovid Complete
subjects Abundance
Adipose tissue
Adipose tissue (brown)
Adipose Tissue, Brown - drug effects
Adipose Tissue, Brown - innervation
Adipose Tissue, Brown - metabolism
Adipose Tissue, White - drug effects
Adipose Tissue, White - innervation
Adipose Tissue, White - metabolism
Adrenergic beta-Antagonists - pharmacology
Adrenergic receptors
Agouti-Related Protein - administration & dosage
Animals
Body fat
CD11b antigen
Cell Line
Denervation
Epididymis - drug effects
Epididymis - metabolism
Explants
Gene expression
Gene Expression - drug effects
Immunoblotting
Inflammation
Inflammation Mediators - metabolism
Inflammatory response
Injections, Intraventricular
Intracerebroventricular administration
Kinases
Lipopolysaccharides
Low level
Macrophages
Macrophages - metabolism
Male
Melanocortin
Mice, Inbred C57BL
Mice, Knockout
Nerves
Peptide Fragments - administration & dosage
Propranolol
Propranolol - pharmacology
Protein kinase A
Proteins
Receptors (physiology)
Receptors, Adrenergic, beta - genetics
Receptors, Adrenergic, beta - metabolism
Reverse Transcriptase Polymerase Chain Reaction
Sympathectomy
Sympathetic nerves
Sympathetic nervous system
Sympathetic Nervous System - metabolism
Tumor Necrosis Factor-alpha - genetics
Tumor Necrosis Factor-alpha - metabolism
Tumor necrosis factor-α
title Sympathetic Nerve Activity Maintains an Anti-Inflammatory State in Adipose Tissue in Male Mice by Inhibiting TNF-α Gene Expression in Macrophages
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