Mast cell tolerance in the skin microenvironment to commensal bacteria is controlled by fibroblasts.

Mast cell tolerance in the skin microenvironment to commensal bacteria is controlled by fibroblasts.
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DOI:
10.1016/j.celrep.2023.112453
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发表时间:
2023-05-30
期刊:
影响因子:
8.8
通讯作者:
--
中科院分区:
生物学1区
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肥大细胞 (MC) 的激活和脱粒是先天性和适应性免疫的重要方面。皮肤MCs最容易暴露在外部环境中,因此面临着快速脱颗粒的风险,并可能造成严重后果。在这里,我们定义了 MC 如何通过与真皮成纤维细胞 (dFB) 的串扰呈现耐受表型,以及这种表型如何在与有益共生细菌接触时减少不必要的炎症。我们探索人类皮肤微环境中人类 MC (HMC) 和 dFB 的相互作用,并测试这种相互作用如何通过抑制核因子 κB (NF-κB) 通路来控制 MC 炎症反应。我们发现,细胞外基质透明质酸作为调节性锌指(去)泛素化酶 A20/肿瘤坏死因子 α 诱导蛋白 3 (TNFAIP3) 的激活剂,导致 HMC 对共生细菌的反应降低。透明质酸作为 MC 上的抗炎配体的作用为炎症和过敏性疾病的潜在治疗开辟了新途径。迪纳尔多等人。发现皮肤中的肥大细胞通过与真皮成纤维细胞的串扰来耐受皮肤共生细菌,真皮成纤维细胞通过上调 NF-κB 的 A20 抑制剂来调节肥大细胞的反应性。这种机制维持皮肤稳态,同时允许肥大细胞对其他损伤做出反应。
Activation and degranulation of mast cells (MCs) is an essential aspect of innate and adaptive immunity. Skin MCs, the most exposed to the external environment, are at risk of quickly degranulating with potentially severe consequences. Here, we define how MCs assume a tolerant phenotype via crosstalk with dermal fibroblasts (dFBs) and how this phenotype reduces unnecessary inflammation when in contact with beneficial commensal bacteria. We explore the interaction of human MCs (HMCs) and dFBs in the human skin microenvironment and test how this interaction controls MC inflammatory response by inhibiting the nuclear factor κB (NF-κB) pathway. We show that the extracellular matrix hyaluronic acid, as the activator of the regulatory zinc finger (de)ubiquitinating enzyme A20/tumor necrosis factor α-induced protein 3 (TNFAIP3), is responsible for the reduced HMC response to commensal bacteria. The role of hyaluronic acid as an anti-inflammatory ligand on MCs opens new avenues for the potential treatment of inflammatory and allergic disorders. Di Nardo et al. find that mast cells in the skin tolerate skin commensal bacteria thanks to crosstalk with dermal fibroblasts that modulate mast cell reactivity by upregulating the A20 inhibitor of NF-κB. This mechanism maintains skin homeostasis while allowing mast cell response to other insults.
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