作者:Robert Rau、Marcus A. Glomb
DOI:10.1021/acs.jafc.2c00906
日期:2022.4.13
products (AGEs) by the interplay of both carbonyl compounds, GA and GX, which was confirmed by isotope labeling experiments. The concentration of pyridinium AGEs was about 1000-fold lower compared to the well-established N6-carboxymethyl lysine. However, pyridinium AGEs were shown to lead to the photosensitized generation of singlet oxygen in irradiation experiments, which was verified by the detection of
短链 α-羟基羰基化合物如乙醇醛 (GA) 及其氧化的对应物乙二醛 (GX) 被称为有效的糖化剂。在这里,合成了一种新型荧光赖氨酸-赖氨酸交联 1-(5-amino-5-carboxypentyl)-3-(5-amino-5-carboxy-pentylamino)pyridinium salt ( meta -DLP),并明确证明了其结构通过1 H NMR、13 C-NMR 附着质子测试和 2D NMR。与已知的单价蛋白质修饰 2-ammonio-6-(3-oxidopyridinium-1-yl)hexanoate (OP-赖氨酸) 相比,获得了化学性质和机械背景的进一步表征。在N 2 - t的各种糖孵育中进行鉴定和定量-Boc-赖氨酸通过羰基化合物 GA 和 GX 的相互作用揭示了两种高级糖基化终产物 (AGEs) 的新替代形成途径,同位素标记实验证实了这一点。吡啶鎓 AGEs 的浓度比公认的N