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| Status |
Public on Oct 18, 2011 |
| Title |
Kupffer cells promote hepatic steatosis via interleukin-1beta-dependent suppression of peroxisome proliferator-activated receptor alpha activity. |
| Organism |
Mus musculus |
| Experiment type |
Expression profiling by array
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| Summary |
Kupffer cells have been implicated in the pathogenesis of various liver diseases. However, their involvement in metabolic disorders of the liver, including fatty liver disease, remains unclear. The present study sought to determine the impact of Kupffer cells on hepatic triglyceride storage and to explore the possible mechanisms involved. To that end, C57Bl/6 mice rendered obese and steatotic by chronic high-fat feeding were treated for 1 week with clodronate liposomes, which cause depletion of Kupffer cells. Loss of expression of marker genes Cd68, F4/80, and Clec4f, and loss of Cd68 immunostaining verified almost complete removal of Kupffer cells from the liver. Also, expression of complement components C1, the chemokine (C-C motif) ligand 6 (Ccl6), and cytokines interleukin-15 (IL-15) and IL-1beta were markedly reduced. Importantly, Kupffer cell depletion significantly decreased liver triglyceride and glucosylceramide levels concurrent with increased expression of genes involved in fatty acid oxidation including peroxisome proliferator-activated receptor alpha (PPARalpha), carnitine palmitoyltransferase 1A (Cpt1alpha), and fatty acid transport protein 2 (Fatp2). Treatment of mice with IL-1beta decreased expression of PPARalpha and its target genes, which was confirmed in primary hepatocytes. Consistent with these data, IL-1beta suppressed human and mouse PPARalpha promoter activity. Suppression of PPARalpha promoter activity was recapitulated by overexpression of nuclear factor kappaB (NF-kappaB) subunit p50 and p65, and was abolished upon deletion of putative NF-kappaB binding sites. Finally, IL-1beta and NF-kappaB interfered with the ability of PPARalpha to activate gene transcription. CONCLUSION: Our data point toward important cross-talk between Kupffer cells and hepatocytes in the regulation of hepatic triglyceride storage. The effect of Kupffer cells on liver triglycerides are at least partially mediated by IL-1beta, which suppresses PPARalpha expression and activity.
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| Overall design |
Expression profiling of livers from mice fed control, low-fat diet diet or high-fat diet for 20weeks with or without knockdown of Kupffer cells.
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| Contributor(s) |
Stienstra R, Saudale F, Duval C, Keshtkar S, Groener JE, van Rooijen N, Staels B, Kersten S, Müller M |
| Citation(s) |
20054868 |
| Submission date |
Oct 18, 2011 |
| Last update date |
Feb 11, 2019 |
| Contact name |
Guido Hooiveld |
| E-mail(s) |
guido.hooiveld@wur.nl
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| Organization name |
Wageningen University
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| Department |
Div. Human Nutrition & Health
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| Lab |
Nutrition, Metabolism & Genomics Group
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| Street address |
HELIX, Stippeneng 4
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| City |
Wageningen |
| ZIP/Postal code |
NL-6708WE |
| Country |
Netherlands |
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| Platforms (1) |
| GPL1261 |
[Mouse430_2] Affymetrix Mouse Genome 430 2.0 Array |
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| Samples (4)
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| Relations |
| BioProject |
PRJNA149467 |
| Supplementary file |
Size |
Download |
File type/resource |
| GSE33044_RAW.tar |
14.4 Mb |
(http)(custom) |
TAR (of CEL) |
| Processed data included within Sample table |
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