Institute for Clinical Chemistry and Laboratory Medicine, University Hospital and Faculty of Medicine Carl Gustav Carus of TU Dresden, Germany (I.M., T.C.).
National Center for Tumor Diseases (NCT), Partner Site Dresden, German Cancer Research Center (DKFZ), Heidelberg, Germany (I.M.).
Arterioscler Thromb Vasc Biol. 2021 Jan;41(1):48-54. doi: 10.1161/ATVBAHA.120.314215. Epub 2020 Nov 19.
Until recently, immunologic memory was considered an exclusive characteristic of adaptive immunity. However, recent advances suggest that the innate arm of the immune system can also mount a type of nonspecific memory responses. Innate immune cells can elicit a robust response to subsequent inflammatory challenges after initial activation by certain stimuli, such as fungal-derived agents or vaccines. This type of memory, termed trained innate immunity (also named innate immune memory), is associated with epigenetic and metabolic alterations. Hematopoietic progenitor cells, which are the cells responsible for the generation of mature myeloid cells at steady-state and during inflammation, have a critical contribution to the induction of innate immune memory. Inflammation-triggered alterations in cellular metabolism, the epigenome and transcriptome of hematopoietic progenitor cells in the bone marrow promote long-lasting functional changes, resulting in increased myelopoiesis and consequent generation of trained innate immune cells. In the present brief review, we focus on the involvement of hematopoietic progenitors in the process of trained innate immunity and its possible role in cardiometabolic disease.
直到最近,免疫记忆才被认为是适应性免疫的独特特征。然而,最近的研究进展表明,免疫系统的先天部分也可以产生一种非特异性的记忆反应。先天免疫细胞在最初被某些刺激(如真菌来源的制剂或疫苗)激活后,对随后的炎症挑战可以产生强烈的反应。这种记忆被称为训练有素的先天免疫(也称为先天免疫记忆),与表观遗传和代谢改变有关。造血祖细胞是在稳态和炎症期间负责生成成熟髓样细胞的细胞,对诱导先天免疫记忆有重要贡献。炎症触发的细胞代谢、骨髓造血祖细胞的表观基因组和转录组改变促进了持久的功能变化,导致骨髓细胞增多和随后产生训练有素的先天免疫细胞。在本简短综述中,我们重点关注造血祖细胞在训练有素的先天免疫过程中的作用及其在代谢性心血管疾病中的可能作用。
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