煮炸鹿茸加工过程中晚期糖基化终产物生成规律及动力学分析

Study on formation regularity and kinetics of advanced glycation end-products during processing of boiled Cervi Cornu Pantotrichum

目的研究煮炸鹿茸加工过程中晚期糖基化终产物的生成规律及动力学参数。方法通过构建葡萄糖与赖氨酸模拟煮炸鹿茸加工过程美拉德(Maillard)反应体系,分别采用紫外-可见分光光度法和UPLC-MS/MS法测定体系褐变指数和典型晚期糖基化终产物(羧甲基赖氨酸和羧乙基赖氨酸)含量变化,探讨晚期糖基化终产物的生成规律和动力学参数。结果鹿茸加工过程中煮炸时发生褐变反应,生成羧甲基赖氨酸和羧乙基赖氨酸反应的活化能分别为5.07、40.44、78.47 kJ/mol,且均为零级反应;烘烤时相应反应的活化能分别为6.72、89.34、164.77 kJ/mol,也均为零级反应。相对于生成羧甲基赖氨酸而言,生成羧乙基赖氨酸所需能量更高,反应更难发生。结论烘烤过程温度变化对晚期糖基化终产物的动力学参数影响显著高于煮炸过程,长时间较高温度的烘烤使鹿茸中产生了较多的晚期糖基化终产物,这些结果为鹿茸加工过程中晚期糖基化终产物的阻断、抑制策略提供了理论基础,对生产绿色安全的鹿茸及加强中药安全具有重要意义。

Objective To study the formation regularity and kinetic parameters of advanced glycation end-products during the processing of boiled Cervi Cornu Pantotrichum(CCP).Methods UV-visible spectrophotometry and UPLC-MS/MS method were used to determine the change of browning index and content of typical advanced glycation end-products,Nε-(carboxymethyl)lysine and Nε-(carboxyethyl)lysine,of the processing system of simulated boiled CCP.The formation regularity and kinetic parameters of advanced glycation end-products during the processing of boiled CCP were discussed by constructing glucose and lysine to simulate the Maillard reaction system of CCP processing.Results The activation energy of browning reaction,Nε-(carboxymethyl)lysine and Nε-(carboxyethyl)lysine reaction during processing of boiled CCP were 5.07,40.44 and 78.47 kJ/mol,respectively,and all of them were zero-order kinetics.The activation energies of the above reactions in the baking process were 6.72,89.34 and 164.77 kJ/mol,respectively,and all of them were zero-order kinetics.Compared to the formation of Nε-(carboxymethyl)lysine,the formation of Nε-(carboxyethyl)lysine required higher activation energy and was more difficult to occur.Conclusion The temperature changed in the baking process has a significantly higher effect on the kinetic parameters of the advanced glycation end-products than in the boiling process.Long-term higher baking temperature resulted in more advanced glycation end-products produced in the boiled CCP.This study provides a solid theoretical basis for the blocking and inhibition strategies of advanced glycation end-products in the processing of CCP,which is also a great significance for the production of green safety CCP and strengthening the safety of traditional Chinese medicine.