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Interleukin-1 receptor accessory protein blockade limits the development of atherosclerosis and reduces plaque inflammation
Lund Univ, Dept Clin Sci, Cardiovasc Res Immune Regulat, Malmö, Sweden.ORCID iD: 0000-0002-3352-0403
Leiden Univ, Leiden Acad Ctr Drug Res, Div Biotherapeut, Leiden, Netherlands.ORCID iD: 0000-0002-7174-1952
Lund Univ, Dept Translat Med, Canc Immunol, Malmö, Sweden.ORCID iD: 0000-0001-5071-9505
Lund Univ, Dept Clin Sci, Cardiovasc Res Immune Regulat, Malmö, Sweden.
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2024 (English)In: Cardiovascular Research, ISSN 0008-6363, E-ISSN 1755-3245, Vol. 120, no 6, p. 581-595Article in journal (Refereed) Published
Abstract [en]

Aims: The interleukin-1 receptor accessory protein (IL1RAP) is a co-receptor required for signalling through the IL-1, IL-33, and IL-36 receptors. Using a novel anti-IL1RAP-blocking antibody, we investigated the role of IL1RAP in atherosclerosis.

Methods and results: Single-cell RNA sequencing data from human atherosclerotic plaques revealed the expression of IL1RAP and several IL1RAP-related cytokines and receptors, including IL1B and IL33. Histological analysis showed the presence of IL1RAP in both the plaque and adventitia, and flow cytometry of murine atherosclerotic aortas revealed IL1RAP expression on plaque leucocytes, including neutrophils and macrophages. High-cholesterol diet fed apolipoprotein E-deficient (Apoe-/-) mice were treated with a novel non-depleting IL1RAP-blocking antibody or isotype control for the last 6 weeks of diet. IL1RAP blockade in mice resulted in a 20% reduction in subvalvular plaque size and limited the accumulation of neutrophils and monocytes/macrophages in plaques and of T cells in adventitia, compared with control mice. Indicative of reduced plaque inflammation, the expression of several genes related to leucocyte recruitment, including Cxcl1 and Cxcl2, was reduced in brachiocephalic arteries of anti-IL1RAP-treated mice, and the expression of these chemokines in human plaques was mainly restricted to CD68+ myeloid cells. Furthermore, in vitro studies demonstrated that IL-1, IL-33, and IL-36 induced CXCL1 release from both macrophages and fibroblasts, which could be mitigated by IL1RAP blockade.

Conclusion: Limiting IL1RAP-dependent cytokine signalling pathways in atherosclerotic mice reduces plaque burden and plaque inflammation, potentially by limiting plaque chemokine production.

Place, publisher, year, edition, pages
Oxford University Press, 2024. Vol. 120, no 6, p. 581-595
Keywords [en]
Atherosclerosis, Immunomodulation, IL-1, Inflammation, IL1RAP
National Category
Cardiology and Cardiovascular Disease
Identifiers
URN: urn:nbn:se:mau:diva-66859DOI: 10.1093/cvr/cvae046ISI: 001194990800001PubMedID: 38563353Scopus ID: 2-s2.0-85193013140OAI: oai:DiVA.org:mau-66859DiVA, id: diva2:1853595
Available from: 2024-04-23 Created: 2024-04-23 Last updated: 2025-02-10Bibliographically approved

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Bengtsson, Eva

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Mulholland, MeganDepuydt, Marie A. C.Jakobsson, GabrielGrentzmann, AndriettaBengtsson, Eva
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