Tissue-specific macrophages: how they develop and choreograph tissue biology

生物 巨噬细胞 免疫系统 细胞生物学 功能(生物学) 多细胞生物 先天免疫系统 平衡 免疫学 细胞 遗传学 体外
作者
Elvira Mass,Falk Nimmerjahn,Katrin Kierdorf,Andreas Schlitzer
出处
期刊:Nature Reviews Immunology [Nature Portfolio]
卷期号:23 (9): 563-579 被引量:300
标识
DOI:10.1038/s41577-023-00848-y
摘要

Macrophages are innate immune cells that form a 3D network in all our tissues, where they phagocytose dying cells and cell debris, immune complexes, bacteria and other waste products. Simultaneously, they produce growth factors and signalling molecules — such activities not only promote host protection in response to invading microorganisms but are also crucial for organ development and homeostasis. There is mounting evidence of macrophages orchestrating fundamental physiological processes, such as blood vessel formation, adipogenesis, metabolism and central and peripheral neuronal function. In parallel, novel methodologies have led to the characterization of tissue-specific macrophages, with distinct subpopulations of these cells showing different developmental trajectories, transcriptional programmes and life cycles. Here, we summarize our growing knowledge of macrophage diversity and how macrophage subsets orchestrate tissue development and function. We further interrelate macrophage ontogeny with their core functions across tissues, that is, the signalling events within the macrophage niche that may control organ functionality during development, homeostasis and ageing. Finally, we highlight the open questions that will need to be addressed by future studies to better understand the tissue-specific functions of distinct macrophage subsets. Macrophages are important for host immunity to infections and for clearing waste products from tissues, but they also maintain tissue health by regulating metabolism, neuronal functions and many other biological processes. Here, Elvira Mass and co-workers discuss the different tissue-specific macrophage populations that are found throughout the body, highlighting shared and unique aspects of their developmental trajectories, transcriptional programmes and physiological functions.
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