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Deng R, Chao X, Li H, Li X, Yang Z, Yu HZ. Smartphone-based microplate reader for high-throughput quantitation of disease markers in serum. Analyst 2023; 148:735-741. [PMID: 36533656 DOI: 10.1039/d2an01571d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Herein, a smartphone-based portable reader with integrated optics for standard microtiter plates (96 wells) has been designed and demonstrated for high-throughput quantitation of validated biomarkers in serum. The customized optical attachment was simply constructed with a convex lens and a light source, by which the transmitted light through a 96-well microtiter plate was converged for imaging with a smartphone, so that accurate and wide-range reading of the plate can be achieved. More importantly, relying on the digitized colorimetric analysis of the obtained images, concentrations of various biomarkers can be determined directly using the customized mobile app. A set of validated biomarkers for inflammation and infection, C-reactive protein (CRP), serum amyloid A (SAA), and procalcitonin (PCT) have been quantitated with this new system; both the response ranges and limits of detection meet the requirement of clinical tests. The consistency with the results obtained using a commercial microplate reader proves its reliability and precision, augments its potential as a point-of-care diagnostic device for on-site testing or resource-limited settings.
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Affiliation(s)
- Rong Deng
- College of Biomedical Engineering, Institute of Biomedical Precision Testing and Instrumentation, Taiyuan University of Technology, Yuci, Shanxi 030600, China.
| | - Xiaoxin Chao
- College of Biomedical Engineering, Institute of Biomedical Precision Testing and Instrumentation, Taiyuan University of Technology, Yuci, Shanxi 030600, China.
| | - Haiqin Li
- College of Biomedical Engineering, Institute of Biomedical Precision Testing and Instrumentation, Taiyuan University of Technology, Yuci, Shanxi 030600, China.
| | - Xiaochun Li
- College of Biomedical Engineering, Institute of Biomedical Precision Testing and Instrumentation, Taiyuan University of Technology, Yuci, Shanxi 030600, China.
| | - Zehua Yang
- Medicine Laboratory, First Hospital of Shanxi Medical University, Taiyuan, Shanxi 030024, China.
| | - Hua-Zhong Yu
- College of Biomedical Engineering, Institute of Biomedical Precision Testing and Instrumentation, Taiyuan University of Technology, Yuci, Shanxi 030600, China. .,Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada.
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Cheng C, Qiao J, Zhang H, Zhao Z, Qi L. Polymer-capped gold nanoparticles as nanozymes with improved catalytic activity for the monitoring of serum ciprofloxacin. Analyst 2022; 147:1509-1514. [PMID: 35293403 DOI: 10.1039/d2an00158f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
More recently, gold nanoparticle (AuNP)-based nanozymes have become one of the burgeoning research hot topics. However, few studies have focused on these AuNP-nanozymes with polymers as ligands. A significant challenge is to reveal their catalytic mechanism and to improve their catalytic activity by changing the structures of the polymers. In this study, polyacrylamide (PAM) with different chain lengths was synthesized and used as the ligand to prepare PAM@AuNPs. The resultant nanozymes exhibited good peroxidase-like activity for catalyzing the oxidation of 3,3',5,5'-tetramethylbenzidine (TMB) in the presence of hydrogen peroxide (H2O2). In particular, due to the electrostatic interaction between the negatively charged PAM@AuNPs and the positively charged drug, the addition of ciprofloxacin in the oxidation system induced the aggregation of PAM@AuNPs and produced more amount of reactive oxygen species, which greatly promoted the catalytic activity of PAM@AuNPs. Inspired by the attractive property, a highly selective and sensitive colorimetric assay for the monitoring of ciprofloxacin was created. A good linear relationship between the UV-Vis absorption intensity of PAM@AuNPs-TMB-H2O2 at 650 nm wavelength and the ciprofloxacin concentration was observed ranging from 1.0 μM to 12.0 μM (R2 = 0.998), providing the detection limit of 0.5 μM. The ciprofloxacin metabolism was further studied in rats. It reveals great potential of polymer protected AuNP-nanozymes in practical drug analysis.
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Affiliation(s)
- Cheng Cheng
- Key Lab of Analytical Chemistry for Living Bio-systems, Institute of Chemistry, Chinese Academy of Sciences, No. 2 Zhongguancun Beiyijie, Beijing 100190, P.R. China. .,College of Chemistry & Environmental Science, Hebei University, Baoding 071002, P. R. China
| | - Juan Qiao
- Key Lab of Analytical Chemistry for Living Bio-systems, Institute of Chemistry, Chinese Academy of Sciences, No. 2 Zhongguancun Beiyijie, Beijing 100190, P.R. China. .,School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, P.R. China
| | - Hongyi Zhang
- College of Chemistry & Environmental Science, Hebei University, Baoding 071002, P. R. China
| | - Zhenwen Zhao
- Key Lab of Analytical Chemistry for Living Bio-systems, Institute of Chemistry, Chinese Academy of Sciences, No. 2 Zhongguancun Beiyijie, Beijing 100190, P.R. China. .,School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, P.R. China
| | - Li Qi
- Key Lab of Analytical Chemistry for Living Bio-systems, Institute of Chemistry, Chinese Academy of Sciences, No. 2 Zhongguancun Beiyijie, Beijing 100190, P.R. China. .,School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing 100049, P.R. China
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