在血管改造中,激活矩阵金属蛋白酶的分子成像
Jiasheng Zhang1, Lei Nie, Mahmoud Razavian
1Raymond and Beverly Sackler Cardiovascular Molecular Imaging Laboratory, Section of Cardiovascular Medicine, Yale University School of Medicine, New Haven, Conn., USA.
Circulation
|October 22, 2008
概括
一种新的成像追踪器RP782成功检测到损伤血管中的矩阵金属蛋白酶 (MMP) 激活. 这种追踪器在体内跟踪血管重塑,为疾病进展提供了新的见解.
科学领域:
- 心血管研究研究心血管研究
- 医疗成像医学成像
- 分子生物学分子生物学
背景情况:
- 矩阵金属蛋白酶 (MMP) 激活对于血管重塑过程至关重要.
- RP782是一种新的印 (111) 标签内标记标记剂,旨在专门针对激活的MMP.
- 这项研究调查了RP782的潜力,以检测由伤害引起的血管重塑在生物体.
研究的目的:
- 评估RP782微观SPECT/CT成像在检测受伤诱导的矩阵金属蛋白酶 (MMP) 激活中的有效性.
- 评估RP782吸收是否与血管重塑程度相关.
- 为了确定RP782是否可以作为一种工具来跟踪血管改造在体内.
主要方法:
- 血管损伤是诱导在左侧的常见心脏动脉的阿波利波蛋白E{\displaystyle E} -/-) 小鼠.
- 评估了矩阵金属蛋白酶的活性,使用in-situ细胞谱.
- 在受伤后的各种时间点内静脉注射RP782标记剂,随后进行微观SPECT/CT成像和定量自辐射.
主要成果:
- 动脉损伤导致显著的增生和重塑超过4周,与增加的MMP活动.
- RP782成像显示,受伤后2至4周内,动脉受伤的焦点标志物被吸收.
- RP782的吸收显示出高特异性,并且与血管壁面积的变化密切相关.
结论:
- RP782 microSPECT/CT成像可以有效地检测血管壁中受伤诱导的矩阵金属蛋白酶激活.
- 在血管重塑过程中,RP782的吸收是超塑性过程的可靠指标.
- 这种成像方法为体内血管改造的追踪提供了一个有前途的方法.
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