Fluorescent diphenylphosphonate-based probes for detection of serine protease activity during inflammation
作者:Laura E. Edgington-Mitchell、Nicholas Barlow、Luigi Aurelio、Aminath Samha、Monika Szabo、Bim Graham、Nigel Bunnett
DOI:10.1016/j.bmcl.2016.11.064
日期:2017.1
vitro, they are less valuable for in vivo studies. We used these probes to evaluate serine protease activity in two mouse models of acute inflammation, including pancreatitis and colitis. As anticipated, the activity of trypsin-like proteases was increased during pancreatitis. Levels of elastase-like proteases were low in pancreatic lysates and colonic luminal fluids, whether healthy or inflamed. Exogenously
基于活性的探针是以活性依赖性方式共价结合蛋白酶活性位点的小分子。我们合成并表征了两种基于荧光活性的探针,它们靶向具有胰蛋白酶样或弹性蛋白酶样活性的丝氨酸蛋白酶。我们评估了这些探针对重组酶的选择性和效力,并证明虽然它们在体外有效标记复杂蛋白质混合物中的活性蛋白酶,但它们在体内的价值较低。学习。我们使用这些探针来评估两种急性炎症小鼠模型(包括胰腺炎和结肠炎)中的丝氨酸蛋白酶活性。正如预期的那样,胰蛋白酶样蛋白酶的活性在胰腺炎期间增加。无论是健康的还是发炎的,胰腺裂解物和结肠腔液中的弹性蛋白酶样蛋白酶水平都很低。外源添加的重组中性粒细胞弹性蛋白酶在与这些样品孵育后受到抑制,与对照相比,这种效果在发炎样品中得到增强。这些数据表明内源性抑制剂和弹性蛋白酶降解蛋白酶在炎症过程中被上调。