Cited by 45Cholesterol and Lipid MetabolismAtherosclerosis and Cardiovascular DiseasesThyroid Disorders and Treatments

TRα Protects Against Atherosclerosis in Male Mice: Identification of a Novel Anti-Inflammatory Property for TRα in Mice

Billon, Cyrielle, Canaple, Laurence, Fleury, Sébastien, Deloire, Alexandre, Beylot, Michel, Dombrowicz, David, del Carmine, Peggy, Samarut, Jacques +1 more·2014·Endocrinology

Abstract

Hypothyroidism is associated with an increased occurrence of atherosclerosis, suggesting some protective role for thyroid hormones (THs). Hypercholesterolemia is one of the major risk factor to develop this disease. Here, we show that the well-known TH cholesterol lowering effect was dependent on TH nuclear receptor (TR)β liver activity. But most importantly, TRα was also shown to contribute of slowing down atherosclerosis progression via an independent mechanism. Introduction of TRα(0/0) deletion in the ApoE(-/-) background accelerated the appearance of plaques. Earlier cholesterol accumulation was detected in aorta macrophages, likely due to impaired cholesterol efflux. The IL-1β inflammatory cytokine was elevated in serum and macrophages in correlation with an activation of the AKT/nuclear factor κB pathway in these cells. Inhibition of AKT prevented inflammation and restored normal cholesterol efflux. Similar low-grade inflammation was identified in TRα(0/0) male mice. Thus, the mere absence of TRα is associated with elevated levels of cytokines likely responsible for cholesterol accumulation and atherosclerosis. This TRα protective activity should be relevant for other inflammatory pathologies.

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Crossref · 10.1210/en.2014-1098

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Authors
Billon, C., Canaple, L., Fleury, S., Deloire, A., Beylot, M., Dombrowicz, D., del Carmine, P., Samarut, J., & Gauthier, K.
Affiliations
  • Lyon 1 Université (FR)
  • Inserm (FR)
  • Anira-ANIPHY (P.d.C.), Faculté Rockefeller, Université Lyon 1, 69008 Lyon, France
Corresponding author
Gauthier, Karine
Venue
Endocrinology
Published
2014-07-01
Volume
155
Issue
7
Pages
2735-2745
ISSN
  • 0013-7227 (ISSN-L)
  • 1945-7170
OpenAlex
W2052383221
Cited by
45
References
45
Citations by year
2026: 3 · 2025: 2 · 2024: 3 · 2023: 5 · 2022: 3 · 2021: 4 · 2020: 5 · 2019: 4 · 2018: 5 · 2017: 4 · 2016: 2 · 2015: 4 · 2014: 1
FWCI
3.64
Type
journal article
Language
en
Open access
closed
Locations
  • Endocrinology (publishedVersion)
  • PubMed (publishedVersion)
  • HAL (submittedVersion)
Topics
  • Health Sciences › Medicine › Surgery › Cholesterol and Lipid Metabolism
  • Life Sciences › Immunology and Microbiology › Immunology › Atherosclerosis and Cardiovascular Diseases
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Thyroid Disorders and Treatments
Keywords
thyroid receptor alpha, atherosclerosis, thyroid hormones, anti-inflammatory activity, IL-1β, AKT/NF-κB signaling, cholesterol efflux, ApoE-deficient mice, hypothyroidism, hypercholesterolemia, atherosclerotic plaque formation
MeSH terms
Animals, Aorta, Apolipoproteins E, Cell Nucleus, Cells, Cultured, Cholesterol, Inflammation, Macrophages, Mice, Inbred C57BL, Thyroid Hormones, Blotting, Western, Bone Marrow Transplantation, NF-kappa B, Mice, Knockout, Reverse Transcriptase Polymerase Chain Reaction, Thyroid Hormone Receptors alpha, Atherosclerosis, Proto-Oncogene Proteins c-akt, Mice, Interleukin-1beta, Mice, 129 Strain

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