Consumption of fish oil high-fat diet induces murine hair loss via epidermal fatty acid binding protein in skin macrophages.

Consumption of fish oil high-fat diet induces murine hair loss via epidermal fatty acid binding protein in skin macrophages.
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DOI:
10.1016/j.celrep.2022.111804
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发表时间:
2022-12-13
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影响因子:
8.8
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--
中科院分区:
生物学1区
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脂肪是健康饮食中必不可少的,但膳食脂肪如何影响免疫细胞功能和整体健康还没有很好的了解。模仿人类高脂饮食(HFDs),富含不同的脂肪酸(FA)成分,我们从不同的脂肪来源(包括鱼油和可可脂)喂养小鼠各种HFDs。食用鱼油HFD的小鼠表现出脱毛表型。进一步的研究表明,鱼油中的omega-3(n-3)FA促进皮肤真皮中CD 207 −(langerin−)骨髓巨噬细胞的非典型浸润,通过升高TNF-α信号诱导脱发。表皮脂肪酸结合蛋白(epidermal fatty acid binding protein,E-FABP)通过激活真皮巨噬细胞中的n-3 FA/ROS/IL-36信号通路,在TNF-α介导的脱发中发挥重要作用。缺乏E-FABP消除鱼油HFD诱导的小鼠脱发。总之,这些发现支持E-FABP作为脂质传感器介导n-3 FA调节的巨噬细胞功能和皮肤健康的作用。膳食脂肪调节免疫细胞功能和皮肤健康。Hao等人的研究表明,富含鱼油而非可可脂的高脂肪饮食会在小鼠模型中诱导脱发。他们发现,在皮肤巨噬细胞中表达的E-FABP在介导鱼油诱导的效应中起着至关重要的作用。
Fats are essential in healthy diets, but how dietary fats affect immune cell function and overall health is not well understood. Mimicking human high-fat diets (HFDs), which are rich in different fatty acid (FA) components, we fed mice various HFDs from different fat sources, including fish oil and cocoa butter. Mice consuming the fish oil HFD exhibit a hair-loss phenotype. Further studies show that omega-3 (n-3) FAs in fish oil promote atypical infiltration of CD207− (langerin−) myeloid macrophages in skin dermis, which induce hair loss through elevated TNF-α signaling. Mechanistically, epidermal fatty acid binding protein (E-FABP) is demonstrated to play an essential role in inducing TNF-α-mediated hair loss by activating the n-3 FA/ROS/IL-36 signaling pathway in dermal resident macrophages. Absence of E-FABP abrogates fish oil HFD-induced murine hair loss. Altogether, these findings support a role for E-FABP as a lipid sensor mediating n-3 FA-regulated macrophage function and skin health. Dietary fats regulate immune cell function and skin health. Hao et al. show that high-fat diets rich in fish oil, but not cocoa butter, induce hair loss in mouse models. They identify that E-FABP expressed in skin macrophages plays an essential role in mediating fish oil-induced effects.
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