Cited by 172Immune Response and InflammationAtherosclerosis and Cardiovascular DiseasesLipoproteins and Cardiovascular Health

Statins Decrease Toll-Like Receptor 4 Expression and Downstream Signaling in Human CD14 + Monocytes

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Methe, Heiko, Kim, Jong-Oh, Kofler, Sieglinde, Nabauer, Michael, Weis, Michael·2005·Arteriosclerosis, Thrombosis, and Vascular Biology

Abstract

Objective— Anti-inflammatory effects of statins contribute to their clinical benefit. Molecular mechanisms underlying these effects have not been well explored. Because statins attenuate lipopolysaccharide (LPS) responsiveness, we hypothesized that part of the pleiotropic effects are mediated through innate immunity. Methods and Results— Toll-like receptor (TLR) 4 expression and downstream signaling in CD14 + monocytes after incubation with simvastatin and atorvastatin were quantified via flow-cytometry, quantitative RT-PCR, kinase assay, and enzyme-linked immunosorbent assay. Incubation with intermediates/ inhibitors of the mevalonate pathway was used to identify the mode of statin action. Statin incubation resulted in a dose-dependent reduction of TLR4 expression (53±7.6% reduction compared with untreated monocytes; P <0.005), transcript levels (68±6.3%; P <0.002), decreased IRAK phosphorylation (37±8.3%; P <0.05), and LPS-induced IL-6, IL-12, tumor necrosis factor (TNF)-α, and B7-1 expression ( P <0.05). Four weeks of treatment with atorvastatin significantly reduced TLR4 expression on circulating CD14 + monocytes by 36.2±4.2% ( P <0.05). Effects of statins were reversed by mevalonate ( P =0.57). Incubation with specific inhibitors of geranylgeranyltransferase (54±4.3%), farnesyltransferase (57±5.1%), or with clostridium-difficile toxin B (58±6.1%, P <0.01) imitated the statin effects. Whereas wortmannin and LY294002 inhibited the statin effect ( P =0.27), incubation with a specific RhoA kinase inhibitor had no effect ( P =0.57). Conclusions— Statins influence TLR4 expression and signaling via inhibition of protein geranylgeranylation and farnesylation. These observations imply interactions with innate immunity as one pleiotropic mechanism.

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  • Atorvastatin down-regulates TLR4 expression in human CD14+ monocytes.

    “A similar effect was also observed in human CD14+ monocytes treated with atorvastatin, whereby TLR 4 expression was significantly down-regulated (Methe et al., 2005).”

    From Atorvastatin Reduces the Survival of Candida albicans-Infected BALB/c Mice (2015) · cites this paper as Methe et al., 2005

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Authors
Methe, H., Kim, J.-O., Kofler, S., Nabauer, M., & Weis, M.
Affiliations
  • Ludwig-Maximilians-Universität München (DE)
  • From the Department of Cardiology, Ludwig-Maximilians-University, Munich, Germany.
Venue
Arteriosclerosis, Thrombosis, and Vascular Biology
Published
2005-07
Volume
25
Issue
7
Pages
1439-1445
ISSN
  • 1079-5642 (ISSN-L)
  • 1524-4636
OpenAlex
W2143835519
Cited by
172
References
30
Citations by year
2026: 1 · 2025: 2 · 2024: 2 · 2023: 1 · 2022: 4 · 2021: 8 · 2020: 8 · 2019: 1 · 2018: 5 · 2017: 4 · 2016: 5 · 2015: 11 · 2014: 10 · 2013: 11 · 2012: 18
FWCI
4.11
Type
journal article
Language
en
Open access
Locations
  • Arteriosclerosis Thrombosis and Vascular Biology (publishedVersion)
  • PubMed (publishedVersion)
Funders
Pfizer
Topics
  • Life Sciences › Immunology and Microbiology › Immunology › Immune Response and Inflammation
  • Life Sciences › Immunology and Microbiology › Immunology › Atherosclerosis and Cardiovascular Diseases
  • Health Sciences › Medicine › Surgery › Lipoproteins and Cardiovascular Health
Keywords
statins, simvastatin, atorvastatin, TLR4, CD14+ monocytes, innate immunity, lipopolysaccharide, mevalonate pathway, geranylgeranylation, farnesylation, geranylgeranyltransferase inhibitors, farnesyltransferase inhibitors, Clostridium difficile toxin B, anti-inflammatory activity, cytokine expression
MeSH terms
Atorvastatin, Phosphoinositide-3 Kinase Inhibitors, Adult, Bacterial Proteins, Bacterial Toxins, Cells, Cultured, Drug Interactions, Female, Heptanoic Acids, Humans, Lipopolysaccharides, Male, Middle Aged, Monocytes, Protein Kinases, Pyrroles, RNA, Messenger, Signal Transduction, Gene Expression, Cytokines, Protein Prenylation, B7-1 Antigen, Lipopolysaccharide Receptors, Hydroxymethylglutaryl-CoA Reductase Inhibitors, 1-(5-Isoquinolinesulfonyl)-2-Methylpiperazine, Phosphatidylinositol 3-Kinases, Protein Kinase Inhibitors, Toll-Like Receptor 4, Interleukin-1 Receptor-Associated Kinases

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