EPISODE · Nov 12, 2025 · 33 MIN
226-真皮巨噬细胞缺失加速皮肤毛细血管老化
from 聊聊Sci
这篇研究报告探讨了皮肤毛细血管相关巨噬细胞（CAMs）的特定类型巨噬细胞如何随年龄增长而选择性减少，以及这种减少如何导致小鼠和人类皮肤毛细血管老化和组织灌注受损。研究人员使用活体双光子显微镜发现，与表皮和下真皮巨噬细胞不同，上真皮的CAMs数量不足以通过局部增殖或重新分布来维持，导致巨噬细胞稀缺的血管微环境。此外，功能实验证明CAMs的吞噬活动对于清除血管碎片和修复毛细血管血流阻塞至关重要，而缺乏CAMs的区域则易受损伤。最后，研究表明通过施用巨噬细胞生长因子（CSF1）在老年小鼠中局部增加CAMs数量，可以有效恢复毛细血管修复率，这暗示了针对巨噬细胞更新的干预措施可能有助于抗击组织老化。References: Mesa K R, O’Connor K A, Ng C, et al. Niche-specific dermal macrophage loss promotes skin capillary ageing[J]. Nature, 2025: 1-9.前往小宇宙评论区与主播互动
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226-真皮巨噬细胞缺失加速皮肤毛细血管老化
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