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首页> 外文期刊>Molecular imaging and biology: MIB : the official publication of the Academy of Molecular Imaging >MicroPET Evaluation of a Hydroxamate-Based MMP Inhibitor, [F-18]FB-ML5, in a Mouse Model of Cigarette Smoke-Induced Acute Airway Inflammation
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MicroPET Evaluation of a Hydroxamate-Based MMP Inhibitor, [F-18]FB-ML5, in a Mouse Model of Cigarette Smoke-Induced Acute Airway Inflammation

机译:MicroPET在香烟烟雾诱导的急性气道炎症小鼠模型中评估基于异羟肟酸酯的MMP抑制剂[F-18] FB-ML5

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摘要

Matrix metalloproteinases (MMPs) are the main proteolytic enzymes involved in the pathogenesis of chronic obstructive pulmonary disease (COPD). A radiolabeled MMP inhibitor, [F-18]FB-ML5, was prepared, and its in vivo kinetics were tested in a mouse model of pulmonary inflammation. BALB/c mice were exposed for 4 days to cigarette smoke (CS) or air. On the fifth day, a dynamic microPET scan was made with [F-18]FB-ML5. Standardized uptake values (PET-SUVmean) were 0.19 +/- 0.06 in the lungs of CS-exposed mice (n = 6) compared to 0.11 +/- 0.03 (n = 5) in air-exposed controls (p < 0.05), 90 min post-injection MMP-9 levels in bronchoalveolar lavage fluid (BALF) were increased from undetectable level to 4615 +/- 1963 pg/ml by CS exposure. Increased MMP expression in a COPD mouse model was shown to lead to increased retention of [F-18]FB-ML5.
机译:基质金属蛋白酶(MMP)是参与慢性阻塞性肺疾病(COPD)发病机理的主要蛋白水解酶。制备了放射性标记的MMP抑制剂[F-18] FB-ML5,并在小鼠肺部炎症模型中测试了其体内动力学。将BALB / c小鼠暴露于香烟烟雾(CS)或空气中4天。在第五天,用[F-18] FB-ML5进行动态microPET扫描。在CS暴露的小鼠(n = 6)的肺中,标准摄取值(PET-SUVmean)为0.19 +/- 0.06,而在空气暴露的对照中,则为0.11 +/- 0.03(n = 5),(p <0.05),通过CS暴露,注射后90分钟,支气管肺泡灌洗液(BALF)中的MMP-9水平从不可检测的水平提高到4615 +/- 1963 pg / ml。研究表明,在COPD小鼠模型中MMP表达的增加导致[F-18] FB-ML5的保留增加。

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