Defective Mer Receptor Tyrosine Kinase Signaling in Bone Marrow Cells Promotes Apoptotic Cell Accumulation and Accelerates Atherosclerosis
Abstract
Objective— To study the role of Mer receptor tyrosine kinase (mertk) in atherosclerosis. Methods and Results— We irradiated and reconstituted atherosclerosis-susceptible C57Bl/6 low-density lipoprotein receptor-deficient female mice ( ldlr −/− ) with either a mertk +/+ or mertk −/− (tyrosine kinase-defective mertk) bone marrow. The mice were put on high-fat diet for either 8 or 15 weeks. Mertk deficiency led to increased accumulation of apoptotic cells within the lesions, promoted a proinflammatory immune response, and accelerated lesion development. Conclusions— Mertk expression by bone marrow-derived cells is required for the disposal of apoptotic cells and controls lesion development and inflammation.
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Defective efferocytosis of apoptotic cells leading to secondary necrosis and leakage of intracellular contents has been proposed to exacerbate the inflammatory milieu.
“defective efferocytosis of apoptotic cells leading to secondary necrosis and leakage of intracellular contents has been proposed to exacerbate the inflammatory milieu 131,132,137 .”
From Vascular smooth muscle cells in atherosclerosis (2019) · cites this paper as [131]
Mice lacking MERTK or expressing a constitutively inactive MERTK have larger plaques and greater necrotic core area than control mice.
“Conversely, mice lacking MERTK or expressing a constitutively inactive form of MERTK show larger plaque size and increased necrotic core area compared with control mice196,197.”
From Inflammation and its resolution in atherosclerosis: mediators and therapeutic opportunities (2019) · cites this paper as [197]
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- Authors
- Ait-Oufella, H., Pouresmail, V., Simon, T., Blanc-Brude, O., Kinugawa, K., Merval, R., Offenstadt, G., Lesèche, G., Cohen, P. L., Tedgui, A., & Mallat, Z.
- Affiliations
- From the Institut National de la Santé et de la Recherche Médicale (Inserm), Unit 689 (H.A.-O., V.P., T.S., O.B.-B., K.K., R.M., A.T., Z.M.), Centre de Recherche Cardiovasculaire Lariboisière, Paris, France; Service de Réanimation Médicale (H.A.-O., G.O.), Hôpital Saint-Antoine, Paris, France; Service de Chirurgie Thoracique et Vasculaire (G.L.), Hôpital Bichat, Paris, France; and Philadelphia VA Medical Center (P.L.C.), University of Pennsylvania, Philadelphia.
- Inserm (FR)
- Venue
- Arteriosclerosis, Thrombosis, and Vascular Biology
- Published
- 2008-08
- Volume
- 28
- Issue
- 8
- Pages
- 1429-1431
- ISSN
- 1079-5642 (ISSN-L)
- 1524-4636
- OpenAlex
- W2099076813
- Cited by
- 187
- References
- 21
- Citations by year
- 2026: 3 · 2025: 8 · 2024: 15 · 2023: 5 · 2022: 13 · 2021: 8 · 2020: 8 · 2019: 11 · 2018: 8 · 2017: 15 · 2016: 8 · 2015: 8 · 2014: 18 · 2013: 15 · 2012: 9
- FWCI
- 4.87
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Arteriosclerosis Thrombosis and Vascular Biology (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Life Sciences › Immunology and Microbiology › Immunology › Atherosclerosis and Cardiovascular Diseases
- Life Sciences › Immunology and Microbiology › Immunology › Phagocytosis and Immune Regulation
- Health Sciences › Medicine › Surgery › Cholesterol and Lipid Metabolism
- Keywords
- Mer receptor tyrosine kinase, MERTK, atherosclerosis, bone marrow-derived cells, efferocytosis, atherosclerotic plaque inflammation, LDL receptor-deficient mice, high-fat diet, atherosclerotic lesion development, immune response
- MeSH terms
- c-Mer Tyrosine Kinase, Animals, Disease Models, Animal, Female, Inflammation, Macrophages, Phagocytosis, Proto-Oncogene Proteins, Receptors, LDL, Apoptosis, Mice, Knockout, Receptor Protein-Tyrosine Kinases, Atherosclerosis, Mice
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