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Tytuł pozycji:

Palmitic acid induces guanylin gene expression through the Toll-like receptor 4/nuclear factor-κB pathway in rat macrophages.

Tytuł :
Palmitic acid induces guanylin gene expression through the Toll-like receptor 4/nuclear factor-κB pathway in rat macrophages.
Autorzy :
Akieda-Asai S; Frontier Science Research Center, University of Miyazaki, Miyazaki, Japan.
Ma H; Frontier Science Research Center, University of Miyazaki, Miyazaki, Japan.
Date Y; Frontier Science Research Center, University of Miyazaki, Miyazaki, Japan.
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Źródło :
American journal of physiology. Cell physiology [Am J Physiol Cell Physiol] 2019 Dec 01; Vol. 317 (6), pp. C1239-C1246. Date of Electronic Publication: 2019 Sep 25.
Typ publikacji :
Journal Article; Research Support, Non-U.S. Gov't
Język :
English
Imprint Name(s) :
Original Publication: Bethesda, Md. : American Physiological Society,
MeSH Terms :
Gastrointestinal Hormones/*genetics
Lipopolysaccharides/*pharmacology
Macrophages, Alveolar/*drug effects
NF-kappa B/*genetics
Natriuretic Peptides/*genetics
Palmitic Acid/*pharmacology
Toll-Like Receptor 4/*genetics
Animals ; Cell Line ; Cyclic GMP/immunology ; Cyclic GMP/metabolism ; Gastrointestinal Hormones/agonists ; Gastrointestinal Hormones/immunology ; Gene Expression Regulation ; Genes, Reporter ; Humans ; Luciferases/genetics ; Luciferases/metabolism ; Macrophages, Alveolar/cytology ; Macrophages, Alveolar/immunology ; Mice ; NF-kappa B/immunology ; Natriuretic Peptides/agonists ; Natriuretic Peptides/immunology ; RAW 264.7 Cells ; Rats ; Receptors, Guanylate Cyclase-Coupled/genetics ; Receptors, Guanylate Cyclase-Coupled/immunology ; Signal Transduction ; THP-1 Cells ; Toll-Like Receptor 4/immunology
Contributed Indexing :
Keywords: NF-κB*; guanylin*; guanylyl cyclase C*; macrophage*; palmitic acid*
Substance Nomenclature :
0 (Gastrointestinal Hormones)
0 (Lipopolysaccharides)
0 (NF-kappa B)
0 (Natriuretic Peptides)
0 (Tlr4 protein, rat)
0 (Toll-Like Receptor 4)
140653-38-9 (guanylin)
2V16EO95H1 (Palmitic Acid)
EC 1.13.12.- (Luciferases)
EC 4.6.1.2 (Receptors, Guanylate Cyclase-Coupled)
H2D2X058MU (Cyclic GMP)
Entry Date(s) :
Date Created: 20190926 Date Completed: 20200407 Latest Revision: 20200930
Update Code :
20210210
DOI :
10.1152/ajpcell.00081.2019
PMID :
31553648
Czasopismo naukowe
Recently, we showed that double-transgenic rats overexpressing guanylin (Gn), a bioactive peptide, and its receptor, guanylyl cyclase-C (GC-C), specifically in macrophages demonstrate an antiobesity phenotype and low-expression levels of proinflammatory cytokines in the mesenteric fat even when fed a high-fat diet. Here, we examined the levels and mechanism of Gn and GC-C transcription following saturated fatty acid and lipopolysaccharide (LPS), an activator of Toll-like receptor 4 (TLR4), exposure by using the NR8383 macrophage cell line. In addition, the levels of guanylin and cGMP were increased by addition of either palmitic acid or LPS. Next, we investigated the interaction of the gene transcription and nuclear factor-κB (NF-κB) by using an NF-κB inhibitor and chromatin immunoprecipitation assay. We showed that palmitic acid induced Gn gene expression via TLR4 and NF-κB. Moreover, we demonstrated that NF-κB binding to the Gn promoter was responsible for the induction of gene transcription by palmitic acid or LPS. Our results indicate that saturated fatty acids such as palmitic acid activate Gn gene expression via the NF-κB pathway, raising the possibility that the activated Gn-GC-C system may contribute to the inhibition of high-fat diet-induced proinflammatory cytokines in macrophages.

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