A novel electrochemical biosensor for ultrasensitive detection of serum total bile acids based on enzymatic reaction combined with the double oxidation circular amplification strategy.

血清总胆汁酸（TBA）水平是肝胆疾病临床诊断中敏感且可靠的指标。本文报道了一种基于酶促反应与双氧化循环放大策略的电化学生物传感器，用于人血清TBA的超灵敏检测。在3α-羟基类固醇脱氢酶（3α-HSD）催化下，3α-胆汁酸与烟酰胺腺嘌呤二核苷酸（NAD+）特异性反应生成还原型烟酰胺腺嘌呤二核苷酸（NADH）。NADH随后与三(2,2'...