group. Peroxy radicals were formed in the presence of oxygen and were the active species in that case. Three photoproducts, isolated from the photodegradation of the drug, were submitted to the same toxicity tests. Two of them were proved to possess toxic or phototoxic properties on erythrocytes, primarily induced by UV-B light, and may participate in the photosensitizing activity of triamcinolone 16
摘要
曲安奈德 16,17-
丙酮的光毒性已通过一组体外试验进行评估。与
曲安奈德诱导的光毒性有关的主要靶点似乎是细胞膜。观察到不依赖于氧的光溶血作用。在
水和缓冲溶液中进行的光
化学研究支持的结论是,这与 C-20 酮基的 Norrish I 型断裂在紫外线照射(特别是 UV-B)下形成的自由基的作用有关。过氧自由基是在氧存在下形成的,在这种情况下是活性物质。从药物的光降解中分离出来的三种光产物进行了相同的毒性测试。其中两种被证明对红细胞具有毒性或光毒性,主要由 UV-B 光诱导,并可能参与
曲安奈德的光敏活性。我们的体外结果表明该药物可以在体内引起弱光敏特性。