In vitro and ex vivo free radical scavenging activities of carazostatin, carbazomycin B and their derivatives.
作者:SHINICHIRO KATO、TOMIKO KAWASAKI、TETSURO URATA、JUNICHIRO MOCHIZUKI
DOI:10.7164/antibiotics.46.1859
日期:——
Free radical scavenging activities of various carbazole compounds, carazostatin, carbazomycin B and their chemically modified derivatives were studied in vitro and ex vivo. Among these compounds, carazostatin, which was isolated as a free radical scavenger from the culture of Streptomyces chromofuscus, showed the most potent inhibitory activity against lipid peroxidation of rat brain homogenate in
在体外和离体研究了各种咔唑化合物,咔唑他汀,咔唑霉素B及其化学修饰衍生物的自由基清除活性。在这些化合物中,从染色链霉菌培养物中分离出作为自由基清除剂的咔唑他汀在体外对大鼠脑匀浆的脂质过氧化表现出最有效的抑制活性。Carbazomycin B,一种已知的抗菌素,在该系统中也表现出强大的活性。尽管Carazostatin和carbazomycin B的O-修饰的衍生物保留了相当大的活性,但N,O-二甲基衍生物并未抑制过氧化。另一方面,这些咔唑在小鼠血浆脂质过氧化系统中的离体评估结果表明,原始化合物及其经O修饰的衍生物在口服给予小鼠后具有很强的抑制活性。这些发现表明,这些天然咔唑及其有效衍生物可以保护组织免受自由基产生的过氧化损害。