在心肌梗塞后适应性重塑需要Biglycan
D Westermann1, J Mersmann, A Melchior
1Abteilung für Kardiologie und Pneumologie, Charite-Universitätsklinikum Berlin, Campus Benjamin Franklin, Berlin, Germany.
Circulation
|February 27, 2008
概括
在心肌梗塞 (MI) 后,Biglycan对于形成稳定的心脏痕组织和维持心脏功能至关重要. 它的缺失导致原蛋白受损,心脏强度降低,心脏病发作后死亡率增加.
科学领域:
- 心血管生物学 心血管生物学
- 细胞外矩阵研究 细胞外矩阵研究
- 蛋白质甘油的功能 蛋白质甘油的功能
背景情况:
- 心肌梗塞 (MI) 触发了细胞外基质重塑,这对痕形成和心脏功能至关重要.
- 失调的矩阵重塑可以导致有害的纤维化和心脏功能受损后MI.
- 研究biglycan的作用,一个小的氨酸丰富的proteoglycan,在心脏中风后的心脏修复是关键的.
研究的目的:
- 为了阐明biglycan在心肌梗塞后心脏细胞外矩阵重塑中的功能.
- 确定大甘油缺乏对心脏血液动力学和心脏中风后结构完整性的影响.
主要方法:
- 在野生型和大糖素缺乏 (bgn(-/0) 的小鼠中诱导了心肌梗塞.
- 心脏组织分析包括Sirius红色染色,双折射和电子显微镜来评估原组织.
- 在体内压力-体积测量评估左心室 (LV) 血液动力学和功能.
主要成果:
- 在野性型心脏中,BIGLYCAN的表达显著增加MI后.
- bgn(-/0) 的小鼠由于增加了 LV 破裂而表现出更高的死亡率.
- 在bgn(-/0) 小鼠中观察到LV拉伸强度降低,原基质组织受损,LV扩张加重,心脏功能严重减弱.
结论:
- 比格利坎在心脏病发作痕组织的结构完整性中起着至关重要的作用.
- 蛋白质甘油大甘油对于在心肌梗塞后保持心脏血液动力学功能是不可或缺的.
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