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Peters L, Bidzhekov K, Jansen Y, Bayasgalan S, Gencer S, Sundararaman S, Bonnin-Marquez A, Yan Y, Jans A, Bartneck M, Doering Y, Weber C, Van Der Vorst E. Micromanaging atherosclerosis: Myeloid cell-specific microRNA-26b attenuates atherosclerosis development. Atherosclerosis 2022. [DOI: 10.1016/j.atherosclerosis.2022.06.136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Peters L, Bidzhekov K, Jansen Y, Bayasgalan S, Gencer S, Sundararaman SS, Bonnin-Marquez A, Yan Y, Jans AM, Bartneck M, Doering Y, Weber C, Van Der Vorst E. Micromanaging atherosclerosis: myeloid cell-specific microRNA-26b attenuates atherosclerosis development. Cardiovasc Res 2022. [DOI: 10.1093/cvr/cvac066.195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: None.
Increasing evidence has shown that microRNAs (miRs) are fundamental players in atherosclerosis, but the exact role of various miRs remains elusive. Preliminary data showed that, with a 5-fold increase, miR-26b was the most highly expressed miR in human atherosclerotic plaques compared to healthy vessels. Therefore, we aimed to determine its cell-specific effects on atherosclerosis development.
We examined the role of miR-26b in atherosclerosis by using full-body knockout (KO) mice on a 4 weeks and 12 weeks Western type diet (WTD) and myeloid cell-specific miR-26b KO (LysM-Cre) mice on 12 weeks WTD on an apolipoprotein E-deficient background. Atherosclerotic plaque size and phenotype were analyzed via immunohistochemical and immunofluorescent stainings. The phenotype and function of bone marrow-derived macrophages (BMDMs) from full body KO mice were analyzed via PCR, ELISA and gelatinase assays. Lipid nanoparticles (LNPs) served as vehicles for miR-26b mimics to restore miR-26b levels in knockout BMDMs.
A full-body miR-26b-KO on a 12 weeks WTD resulted in a striking 3.5-fold increase in atherosclerotic lesion size, compared to control. Consistent with a more advanced plaque phenotype, collagen content, smooth muscle cell percentage and relative necrotic core area were all significantly increased in plaques from miR-26b KO mice whilst the relative macrophage content was significantly reduced. Interestingly, the full-body KO mice on a 4 weeks WTD showed a remarkable 10-fold increase in plaque size and the respective plaques also had a reduced macrophage percentage, showing that miR-26b has very strong effects on both atherogenesis as well as atherosclerosis progression. Intriguingly, relative plaque size in the arches of miR-26b LysM-Cre mice were increased by 3-fold and collagen content was also increased significantly, suggesting a role for myeloid-specific miR-26b in atherosclerosis development. Further highlighting its myeloid-specific effects, miR-26b KO BMDMs showed an increase in IL-6 and TNFα secretion, which could be rescued by LNPs containing miR-26b mimics. Additionally, these miR-26b KO BMDMs showed a reduction in collagen breakdown.
Overall, our results clearly demonstrate an atheroprotective role of myeloid cell-specific miR-26b by attenuating lesion initiation as well as progression, mainly by suppressing inflammation and stimulating collagen breakdown. Our study leads to exciting new insights into the role of miR-26b in atherosclerosis development, providing an important back-bone for future research and potential new treatment options.
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Affiliation(s)
- L Peters
- RWTH University Hospital Aachen , Aachen , Germany
| | - K Bidzhekov
- Institute for Cardiovascular Prevention (IPEK-LMU) , Munich , Germany
| | - Y Jansen
- Institute for Cardiovascular Prevention (IPEK-LMU) , Munich , Germany
| | - S Bayasgalan
- Institute for Cardiovascular Prevention (IPEK-LMU) , Munich , Germany
| | - S Gencer
- Institute for Cardiovascular Prevention (IPEK-LMU) , Munich , Germany
| | | | | | - Y Yan
- Institute for Cardiovascular Prevention (IPEK-LMU) , Munich , Germany
| | - AM Jans
- RWTH University Hospital Aachen , Aachen , Germany
| | - M Bartneck
- RWTH University Hospital Aachen , Aachen , Germany
| | - Y Doering
- Institute for Cardiovascular Prevention (IPEK-LMU) , Munich , Germany
| | - C Weber
- Institute for Cardiovascular Prevention (IPEK-LMU) , Munich , Germany
| | - E Van Der Vorst
- Institute for Cardiovascular Prevention (IPEK-LMU) , Munich , Germany
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Peters L, Bidzhekov K, Jansen Y, Haberbosch M, Gencer S, Müller M, Bayasgalan S, Megens R, Döring Y, Weber C, Van der Vorst E. Micromanaging Atherosclerosis: Vascular Cell-Specific Microrna-26b Attenuates Atherosclerosis Development. Atherosclerosis 2019. [DOI: 10.1016/j.atherosclerosis.2019.06.137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Gencer S, van der Vorst E, Jansen Y, Bianchini M, Peters L, Müller M, Bayasgalan S, Megens R, Söhnlein O, Döring Y, Weber C. Endothelial Atypical Chemokine Receptor-3 Is A Novel Driver Of Atherosclerosis. Atherosclerosis 2019. [DOI: 10.1016/j.atherosclerosis.2019.06.051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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