The reaction of hyaluronic acid and its monomers, glucuronic acid and N-acetylglucosamine, with reactive oxygen species
作者:Michael Jahn、John W Baynes、Gerhard Spiteller
DOI:10.1016/s0008-6215(99)00186-x
日期:1999.10
meso-Tartaric acid, arabinuronic acid, arabinaric acid and glucaric acid were identified by GC-MS as oxidation products of glucuronic acid. When GlcNAc was oxidised, erythronic acid, arabinonic acid, 2-acetamido-2-deoxy-gluconic acid, glyceric acid, erythrose and arabinose were formed. NaOCl oxidation of HA yielded meso-tartaric acid; in addition, arabinaric acid and glucaric acid were obtained by
滑膜液是约0.15%(w / v)的透明质酸(HA)水溶液,透明质酸是由GlcA和GlcNAc的交替单元组成的多糖。在患有类风湿性关节炎的患者的滑液中,HA被认为是由Fenton化学产生的自由基(Fe2 + / H2O2)或由髓过氧化物酶产生的NaOCl所降解。我们研究了这两种反应物在生理缓冲液中与HA以及与相应单体GlcA和GlcNAc的模型反应过程。气相色谱-质谱法鉴定了内消旋-酒石酸,阿拉伯糖醛酸,阿拉伯糖酸和葡糖二酸为葡萄糖醛酸的氧化产物。当氧化GlcNAc时,形成了赤藓酸,阿拉伯糖酸,2-乙酰氨基-2-脱氧葡萄糖酸,甘油酸,赤藓糖和阿拉伯糖。NaOCl氧化HA生成中酒石酸;此外,通过用Fe 2+ / H 2 O 2氧化获得阿拉伯酸和葡糖二酸。这些结果表明HA的氧化降解主要在葡萄糖醛酸残基处进行。介孔-酒石酸可能是透明质酸盐氧化的有用生物标志物,因为它是由NaOCl和Fenton化学产生的。