胸前动脉动脉瘤的发展取决于膜类型-1矩阵金属蛋白酶的活性和丰度
Ying Xiong1, Rupak Mukherjee1, Sarah L Lieser1
1Department of Surgery, Division of Cardiothoracic Surgery, Medical University of South Carolina, Charleston, SC 29425, USA.
Biomolecules
|February 27, 2026
概括
纤维细胞衍生的膜类型-1矩阵金属蛋白酶 (MT1-MMP) 通过激活TGF-β信号,影响细胞外矩阵重塑和大动脉扩张,驱动胸前大动脉动脉瘤 (TAA) 的发展.
科学领域:
- 心血管生物学 心血管生物学
- 细胞外矩阵生物学 细胞外矩阵生物学
- 分子医学是分子医学.
背景情况:
- 胸前动脉动脉瘤 (TAA) 涉及失调的细胞外矩阵重塑.
- 升高的矩阵金属蛋白酶 (MMP) 活性,特别是膜型-1 MMP (MT1-MMP),与TAA有关.
- 大动脉纤维细胞被怀疑是TAA中MT1-MMP的关键来源.
研究的目的:
- 研究MT1-MMP在TAA发育中的特定作用,特别是来自纤维细胞的MT1-MMP.
- 阐明将MT1-MMP与TAA病变发生联系起来的分子机制.
- 评估针对MT1-MMP和TGF-β信号的治疗策略.
主要方法:
- 利用各种MT1-MMP转基因小鼠菌株,包括MT1-MMP缺陷和纤维细胞特异性淘汰模型.
- 分析了TAA诱导,大动脉直径变化和原纤维组成.
- 在隔离的大动脉纤维细胞中评估MT1-MMP的丰度,活性和TGF-β激活.
- 管理的MT1-MMP和TGF-β中和抗体.
主要成果:
- MT1-MMP 缺乏减少了TAA的发展,大动脉扩张,改变了原结构.
- 纤维细胞特定的MT1-MMP淘汰赛减弱了TAA诱导的变化.
- 在线纤维细胞中MT1-MMP水平和TGF-β激活之间发现了正相关性.
- 针对MT1-MMP或TGF-β缓解大动脉扩张的中和抗体.
结论:
- 来自纤维细胞的MT1-MMP对于胸前大动脉动脉瘤的发展至关重要.
- 通过促进TGF-β信号传递,MT1-MMP有助于TAA的致病性.
- 向纤维细胞MT1-MMP或TGF-β代表了TAA的潜在治疗方法.
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