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Yu M, Ye R, Zeng T, Tan L, Zhao Z, Gao W, Chen X, Lian Z, Ma Y, Li A, Hu J. Constructing an Ultra-Rapid Nanoconfinement-Enhanced Fluorescence Clinical Detection Platform by Using Machine Learning and Tunable DNA Xerogel "Probe". Anal Chem 2023; 95:15690-15699. [PMID: 37830461 DOI: 10.1021/acs.analchem.3c02955] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2023]
Abstract
Low mass transfer efficiency and unavoidable matrix effects seriously limit the development of rapid and accurate determination of biosensing systems. Herein, we have successfully constructed an ultra-rapid nanoconfinement-enhanced fluorescence clinical detection platform based on machine learning (ML) and DNA xerogel "probe", which was performed by detecting neutrophil gelatinase-associated lipocalin (NGAL, protein biomarker of acute kidney injury). By regulating pore sizes of the xerogels, the transfer of NGAL in xerogels can approximate that in homogeneous solution. Due to electrostatic attraction of the pore entrances, NGAL rapidly enriches on the surface and inside the xerogels. The reaction rate of NGAL and aptamer cross-linked in xerogels is also accelerated because of the nanoconfinement effect-induced increasing reactant concentration and the enhanced affinity constant KD between reactants, which can be promoted by ∼667-fold than that in bulk solution, thus achieving ultra-rapid detection (ca. 5 min) of human urine. The platform could realize one-step detection without sample pretreatments due to the antiligand exchange effect on the surface of N-doped carbon quantum dots (N-CQDs) in xerogels, in which ligand exchange between -COOH and underlying interfering ions in urine will be inhibited due to higher adsorption energy of -COOH on the N-CQD surface relative to the interfering ions. Based on the ML-extended program, the real-time analysis of the urine fluorescence spectra can be completed within 2 s. Interestingly, by changing DNA, aptamer sequences, or xerogel fluorescence intensities, the detection platform can be customized for targeted diseases.
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Affiliation(s)
- Meng Yu
- School of Chemistry and Chemical Engineering, Key Lab of Fuel Cell Technology of Guangdong Province, South China University of Technology, Guangzhou 510641, China
- Division of Nephrology, Nanfang Hospital, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research, Guangdong Provincial Institute of Nephrology, Guangdong Provincial Key Laboratory of Renal Failure Research, Southern Medical University, Guangzhou 510515, China
| | - Rongkai Ye
- School of Chemistry and Chemical Engineering, Key Lab of Fuel Cell Technology of Guangdong Province, South China University of Technology, Guangzhou 510641, China
| | - Tao Zeng
- Division of Nephrology, Nanfang Hospital, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research, Guangdong Provincial Institute of Nephrology, Guangdong Provincial Key Laboratory of Renal Failure Research, Southern Medical University, Guangzhou 510515, China
| | - Li Tan
- School of Chemistry and Chemical Engineering, Key Lab of Fuel Cell Technology of Guangdong Province, South China University of Technology, Guangzhou 510641, China
| | - Ziyu Zhao
- School of Chemistry and Chemical Engineering, Key Lab of Fuel Cell Technology of Guangdong Province, South China University of Technology, Guangzhou 510641, China
| | - Wenjing Gao
- School of Chemistry and Chemical Engineering, Key Lab of Fuel Cell Technology of Guangdong Province, South China University of Technology, Guangzhou 510641, China
| | - Xin Chen
- School of Chemistry and Chemical Engineering, Key Lab of Fuel Cell Technology of Guangdong Province, South China University of Technology, Guangzhou 510641, China
| | - Ziqi Lian
- School of Chemistry and Chemical Engineering, Key Lab of Fuel Cell Technology of Guangdong Province, South China University of Technology, Guangzhou 510641, China
| | - Ying Ma
- School of Chemistry and Chemical Engineering, Key Lab of Fuel Cell Technology of Guangdong Province, South China University of Technology, Guangzhou 510641, China
| | - Aiqing Li
- Division of Nephrology, Nanfang Hospital, National Clinical Research Center for Kidney Disease, State Key Laboratory of Organ Failure Research, Guangdong Provincial Institute of Nephrology, Guangdong Provincial Key Laboratory of Renal Failure Research, Southern Medical University, Guangzhou 510515, China
| | - Jianqiang Hu
- School of Chemistry and Chemical Engineering, Key Lab of Fuel Cell Technology of Guangdong Province, South China University of Technology, Guangzhou 510641, China
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Li XQ, Jia YL, Zhang YW, Chen HY, Xu JJ. Intracellular activated logic nanomachines based on framework nucleic acids for low background detection of microRNAs in living cells. Chem Sci 2023; 14:7699-7708. [PMID: 37484658 PMCID: PMC10356544 DOI: 10.1039/d3sc01162c] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Accepted: 06/18/2023] [Indexed: 07/25/2023] Open
Abstract
DNA molecular machines based on DNA logic circuits show unparalleled potential in precision medicine. However, delivering DNA nanomachines into real biological systems and ensuring that they perform functions specifically, quickly and logically remain a challenge. Here, we developed an efficient DNA molecular machine integrating transfer-sensor-computation-output functions to achieve high fidelity detection of intracellular biomolecules. The introduction of pH nanoswitches enabled the nanomachines to be activated after entering the cell, and the spatial-confinement effect of the DNA triangular prism (TP) enables the molecular machine to process complex information at the nanoscale, with higher sensitivity and shorter response time than diffuse-dominated logic circuits. Such cascaded activation molecular machines follow the logic of AND to achieve specific capture and detection of biomolecules in living cells through a multi-hierarchical response, providing a new insight into the construction of efficient DNA molecular machines.
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Affiliation(s)
- Xiao-Qiong Li
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 China
| | - Yi-Lei Jia
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 China
| | - Yu-Wen Zhang
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 China
| | - Hong-Yuan Chen
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 China
| | - Jing-Juan Xu
- State Key Laboratory of Analytical Chemistry for Life Science, School of Chemistry and Chemical Engineering, Nanjing University Nanjing 210023 China
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