作者:Jean-Alexandre Richard、Ludovic Jean、Caroline Schenkels、Marc Massonneau、Anthony Romieu、Pierre-Yves Renard
DOI:10.1039/b905725k
日期:——
A new generation of dioxetane-based chemiluminescent substrates suitable for detecting protease activities is described. Our strategy involves the use of a self-cleavable spacer as the key molecular component of these protease-sensitive chemiluminescent probes. Among the assayed strategies, the PABA (para-aminobenzylic alcohol) linker associated with an ether linkage enables the release of the light-emitting phenolic 1,2-dioxetane moiety through an enzyme-initiated domino reaction. To validate this strategy, two proteolytic enzymes were chosen: penicillin amidase and caspase-3, and the corresponding self-cleavable chemiluminescent substrates were synthesised. Their evaluation using an in vitro assay has enabled us to prove the decomposition of the linker under physiological conditions and the selectivity for the targeted enzyme.
描述了适合检测蛋白酶活性的新一代基于二氧杂环丁烷的化学发光底物。我们的策略涉及使用可自裂解的间隔区作为这些蛋白酶敏感的化学发光探针的关键分子成分。在所分析的策略中,与醚键相关的 PABA(对氨基苯甲醇)连接体能够通过酶引发的多米诺骨牌反应释放发光酚类 1,2-二氧杂环丁烷部分。为了验证这一策略,选择了两种蛋白水解酶:青霉素酰胺酶和 caspase-3,并合成了相应的自裂解化学发光底物。他们使用体外测定进行的评估使我们能够证明连接子在生理条件下的分解以及目标酶的选择性。