850-Sparcl1通过抑制淋巴管生成缓解腹主动脉瘤 episode artwork

EPISODE · Apr 24, 2026 · 22 MIN

850-Sparcl1通过抑制淋巴管生成缓解腹主动脉瘤

from 聊聊Sci

这项发表在《Nature Immunology》的研究揭示了血管驻留巨噬细胞(VRMs)在保护生物体免受腹主动脉瘤(AAA)侵害中的关键作用。研究发现,分布在血管外膜的 Lyve1+ 巨噬细胞能够分泌一种名为 Sparcl1(Sc1) 的胞外基质蛋白,通过其钙结合结构域捕捉并抑制生长因子 FGF2。如果这种蛋白缺失,受损的信号通路会导致功能障碍性淋巴管生成,进而引发三级淋巴结构(TLSs)的形成,从而加速动脉瘤的恶化。实验证明,缺乏 Sc1 会显著降低存活率并增加血管破裂风险,而使用源自 Sc1 的合成肽 Spa17 进行干预,能有效缓解实验模型的病变进展。该发现不仅阐明了免疫微环境维持血管稳态的分子机制,还为开发治疗腹主动脉瘤的非侵入性药物提供了极具潜力的新方向。References: Chen M H, Hua Y J, Li Y, et al. Sparcl1 mitigates abdominal aortic aneurysm through inhibiting lymphangiogenesis-mediated TLS formation[J]. Nature Immunology, 2026: 1-12.前往小宇宙评论区与主播互动

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850-Sparcl1通过抑制淋巴管生成缓解腹主动脉瘤

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