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嵌合吞噬受体可改善凋亡细胞清除并减轻炎症。

Chimeric efferocytic receptors improve apoptotic cell clearance and alleviate inflammation.

机构信息

The Center for Cell Clearance, University of Virginia, Charlottesville, VA, USA; Department of Microbiology, Immunology, and Cancer Biology, University of Virginia, Charlottesville, VA, USA; Department of Medicine, Division of Nephrology and Center for Immunity, Inflammation and Regenerative Medicine (CIIR), University of Virginia, Charlottesville, VA, USA; Preemptive Food Research Center (PFRC), Gifu University Institute for Advanced Study, Gifu, Japan.

Department of Medicine, Division of Nephrology and Center for Immunity, Inflammation and Regenerative Medicine (CIIR), University of Virginia, Charlottesville, VA, USA.

出版信息

Cell. 2022 Dec 22;185(26):4887-4903.e17. doi: 10.1016/j.cell.2022.11.029.


DOI:10.1016/j.cell.2022.11.029
PMID:36563662
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9930200/
Abstract

Our bodies turn over billions of cells daily via apoptosis and are in turn cleared by phagocytes via the process of "efferocytosis." Defects in efferocytosis are now linked to various inflammatory diseases. Here, we designed a strategy to boost efferocytosis, denoted "chimeric receptor for efferocytosis" (CHEF). We fused a specific signaling domain within the cytoplasmic adapter protein ELMO1 to the extracellular phosphatidylserine recognition domains of the efferocytic receptors BAI1 or TIM4, generating BELMO and TELMO, respectively. CHEF-expressing phagocytes display a striking increase in efferocytosis. In mouse models of inflammation, BELMO expression attenuates colitis, hepatotoxicity, and nephrotoxicity. In mechanistic studies, BELMO increases ER-resident enzymes and chaperones to overcome protein-folding-associated toxicity, which was further validated in a model of ER-stress-induced renal ischemia-reperfusion injury. Finally, TELMO introduction after onset of kidney injury significantly reduced fibrosis. Collectively, these data advance a concept of chimeric efferocytic receptors to boost efferocytosis and dampen inflammation.

摘要

我们的身体每天通过细胞凋亡更新数十亿个细胞,而这些细胞又被吞噬细胞通过“吞噬作用”清除。吞噬作用的缺陷现在与各种炎症性疾病有关。在这里,我们设计了一种增强吞噬作用的策略,称为“吞噬作用嵌合受体”(CHEF)。我们将细胞质衔接蛋白 ELMO1 中的特定信号结构域融合到吞噬作用受体 BAI1 或 TIM4 的胞外磷脂酰丝氨酸识别结构域中,分别生成 BELMO 和 TELMO。表达 CHEF 的吞噬细胞的吞噬作用明显增加。在炎症的小鼠模型中,BELMO 的表达可减轻结肠炎、肝毒性和肾毒性。在机制研究中,BELMO 增加内质网驻留酶和伴侣蛋白以克服与蛋白质折叠相关的毒性,这在内质网应激诱导的肾缺血再灌注损伤模型中得到了进一步验证。最后,在肾损伤发生后引入 TELMO 可显著减少纤维化。总之,这些数据提出了一种嵌合吞噬受体的概念,以增强吞噬作用并抑制炎症。

相似文献

[1]
Chimeric efferocytic receptors improve apoptotic cell clearance and alleviate inflammation.

Cell. 2022-12-22

[2]
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[3]
MERTK tyrosine kinase receptor together with TIM4 phosphatidylserine receptor mediates distinct signal transduction pathways for efferocytosis and cell proliferation.

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[4]
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[5]
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[6]
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[7]
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[8]
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[9]
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[10]
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引用本文的文献

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Nat Biomed Eng. 2025-9-3

[2]
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Commun Biol. 2025-7-29

[3]
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Nat Cancer. 2025-4-29

[4]
Microneedle delivery of CAR-M-like engineered macrophages alleviates intervertebral disc degeneration through enhanced efferocytosis capacity.

Cell Rep Med. 2025-4-15

[5]
The antipsychotic drug thiothixene stimulates macrophages to clear pathogenic cells by inducing arginase 1 and continual efferocytosis.

Sci Signal. 2025-4-8

[6]
Microglia efferocytosis: an emerging mechanism for the resolution of neuroinflammation in Alzheimer's disease.

J Neuroinflammation. 2025-3-30

[7]
The role of efferocytosis in inflammatory bowel disease.

Front Immunol. 2025-2-18

[8]
Immunomodulatory effect of efferocytosis at the maternal-fetal interface.

Cell Commun Signal. 2025-1-27

[9]
Biochemical and biophysical mechanisms macrophages use to tune phagocytic appetite.

J Cell Sci. 2025-1-1

[10]
Neuroprotective Potential of Nitroglycerin in Ischemic Stroke: Insights into Neural Glucose Metabolism and Endoplasmic Reticulum Stress Inhibition.

J Am Heart Assoc. 2024-12-17

本文引用的文献

[1]
Sweeping Up Dying Cells during Tissue Injury.

Nephron. 2022

[2]
Efferocytosis by Paneth cells within the intestine.

Curr Biol. 2021-6-7

[3]
The clinical landscape for AAV gene therapies.

Nat Rev Drug Discov. 2021-3

[4]
Determining the effector response to cell death.

Nat Rev Immunol. 2021-5

[5]
Live-imaging of astrocyte morphogenesis and function in zebrafish neural circuits.

Nat Neurosci. 2020-9-7

[6]
Structure of the DOCK2-ELMO1 complex provides insights into regulation of the auto-inhibited state.

Nat Commun. 2020-7-10

[7]
The clearance of dead cells by efferocytosis.

Nat Rev Mol Cell Biol. 2020-4-6

[8]
Efferocytosis in health and disease.

Nat Rev Immunol. 2019-12-10

[9]
Interpreting an apoptotic corpse as anti-inflammatory involves a chloride sensing pathway.

Nat Cell Biol. 2019-12-2

[10]
Living on the Edge: Efferocytosis at the Interface of Homeostasis and Pathology.

Immunity. 2019-5-21

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