[关键词]
[摘要]
目的 利用石墨烯纳米酶优良的类过氧化物酶活性,构建药物抗氧化活性测定新方法;并实际用于民族药醉马草抗氧化活性的测定。方法 在优化H2O2浓度和反应时间的基础上,对18批醉马草样品进行抗氧化活性测定。同时采用1,1-二苯基-2-三硝基苯肼(DPPH)法作为方法对照。使用Bland-Altman、Passing-Bablok回归法,对2种方法测定结果进行比较。结果 利用纳米酶法,测得18个批次醉马草的抑制率在37.28%~71.58%,平均值为50.87%,中位数为47.09%;利用DPPH法,测得的自由基清除率在36.06%~83.11%,平均值为54.89%,中位数为50.83%。统计结果显示,纳米酶法和DPPH法的测定值相近;2种方法之间存在线性关系,且可以通过Passing-Bablok回归法实现不同方法的相互转化。结论 成功将石墨烯纳米酶应用到抗氧化活性检测,避免了试剂光敏感问题,缩短了反应时间,减少了药材用量,且结果与经典DPPH法一致。同时也显示了醉马草具有抗氧化活性,为进一步探究其生物活性奠定了基础。
[Key word]
[Abstract]
Objective To develop a new method for the determination of anti-oxidant activity of drugs by using the peroxidase activity of graphene nanoenzyme, and apply it for the determination of the anti-oxidant activity of the national medicine Achnatherum inebrians. Methods The anti-oxidant activity of 18 batches of samples was measured after optimizing H2O2 concentration and reaction time. At the same time, the anti-oxidative activity was measured again using the DPPH method. The Bland-Altman and Passing-Bablok regression methods were used to compare the detection data of the two methods. Results Using the nanoenzyme method, the inhibition rates of 18 batches of A. inebrians were between 37.28% and 71.58%, with an average of 50.87% and a median of 47.09%. Free radical scavenging rates of 18 batches of A. inebrians measured by the DPPH method were between 36.06% and 83.11%, with an average of 54.89% and a median of 50.83%. The statistical results showed that the measured values of nanoenzyme method and DPPH method were similar; There was a linear relationship between the two methods, and different methods can be transformed by Passing-Bablok regression method. Conclusion The graphene nanoenzyme was successfully applied to the detection of anti-oxidant activity, and the anti-oxidant activity of A. inebrians was also found. The nanoenzyme method can avoid the problem of light sensitivity of the reagent, shorten the reaction time, reduce the amount of medicinal solution, and the results are consistent with the DPPH method, which is suitable for the determination of antioxidant activity.
[中图分类号]
R286.02
[基金项目]
国家自然科学基金项目(81573834);民族医药教育部重点实验室(中央民族大学)自主课题(KLEM-ZZ201808);中央民族大学青年教师科研能力提升计划项目(2019QNPY67)