促炎细胞因子
免疫学
免疫系统
肿瘤坏死因子α
人口
免疫耐受
平衡
生物
树突状细胞
炎症
细胞生物学
医学
环境卫生
作者
Jessica Bourque,Daniel Hawiger
标识
DOI:10.1016/j.it.2022.12.006
摘要
In contrast to conventional dendritic cells (cDCs) that are constantly exposed to microbial signals at anatomical barriers, cDCs in systemic lymphoid organs are sheltered from proinflammatory stimulation in the steady state but respond to inflammatory signals by gaining specific immune functions in a process referred to as maturation. Recent findings show that, during maturation, a population of systemic tolerogenic cDCs undergoes an acute tumor necrosis factor α (TNFα)-mediated cell death, resulting in the loss of tolerance-inducing capacity. This tolerogenic cDC population is restored upon return to the homeostatic baseline. We propose that such a dynamic reshaping of cDC populations becomes the foundation of a novel framework for maintaining tolerance at the steady state while being conducive to unhampered initiation of immune responses under proinflammatory conditions.
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