Bai Chen-Chen, Lang Jin-Ye, Wang Xin-Yu, Zhao Jia-Meng, Dong Lin-Yi, Liu Jun-Jie, Wang Xian-Hua
Pharmacy Department of Tianjin Baodi Hospital, Tianjin Medical University Baodi Hospital, Tianjin, 301800, China.
Tianjin Key Laboratory On Technologies Enabling Development of Clinical Therapeutics and Diagnostics, Building B for School of Pharmacy, Tianjin Medical University, 22 Qixiangtai Road, Heping District, Tianjin, 300070, China.
Anal Sci. 2025 Jan;41(1):23-34. doi: 10.1007/s44211-024-00670-z. Epub 2024 Oct 3.
The present article introduced an natural enzyme-covered/amino-modified Pd-Pt bimetallic-doped zeolitic imidazolate framework (NAPPZ) for ultrasensitive and specific detection of glucose. The dodecahedral nanomaterial zeolitic imidazolate framework (ZIF-8)-loaded Pd-Pt bimetallic nanoparticles endowed the composite with peroxidase-like activity. The modification with glucose oxidase (GOx) facilitated the rapid access of HO produced through glucose oxidation to the Pd-Pt nanoparticles vicinity reducing diffusion. GOx specifically catalyzes the transformation of glucose into HO, which then HO rapidly migrates to the Pd-Pt nanoparticles, catalyzing the oxidation of colorless o-phenylenediamine into the orange-yellow product 2,3-diaminophenazine. Based on the aforementioned cascade reaction, the NAPPZ and NAPPZ based on ChOx were utilized for detecting glucose in human urine samples and cholesterol in milk, respectively. The NAPPZ strategy presented a broad detection range (20-1100 μmol L) and a low detection limit (15.9 μmol L) for glucose, and the NAPPZ based on ChOx strategy approach offered a broad detection range (10-500 μmol L) and low detection limit (6.4 μmol L) for cholesterol. Therefore, this novel method holds significant potential in the areas of clinical diagnostics and food safety.
本文介绍了一种用于超灵敏、特异性检测葡萄糖的天然酶包覆/氨基修饰的钯-铂双金属掺杂沸石咪唑酯骨架(NAPPZ)。负载钯-铂双金属纳米颗粒的十二面体纳米材料沸石咪唑酯骨架(ZIF-8)赋予了该复合材料类过氧化物酶活性。用葡萄糖氧化酶(GOx)进行修饰,有助于通过葡萄糖氧化产生的过氧化氢迅速扩散到钯-铂纳米颗粒附近,减少扩散。GOx特异性地催化葡萄糖转化为过氧化氢,然后过氧化氢迅速迁移到钯-铂纳米颗粒处,催化无色邻苯二胺氧化为橙黄色产物2,3-二氨基吩嗪。基于上述级联反应,NAPPZ和基于胆固醇氧化酶(ChOx)的NAPPZ分别用于检测人尿液样本中的葡萄糖和牛奶中的胆固醇。NAPPZ策略对葡萄糖具有较宽的检测范围(20 - 1100 μmol/L)和较低的检测限(15.9 μmol/L),基于ChOx的NAPPZ策略对胆固醇具有较宽的检测范围(10 - 500 μmol/L)和较低的检测限(6.4 μmol/L)。因此,这种新方法在临床诊断和食品安全领域具有巨大的潜力。