1
|
Wang Z, Chen J, Ma H, Deng Y, Li Y, Geng L, Huang Y, Fan Y. A novel copper ion enhanced electrochemical DNA biosensor for the determination of epinephrine. Talanta 2024; 276:126274. [PMID: 38788379 DOI: 10.1016/j.talanta.2024.126274] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2023] [Revised: 04/12/2024] [Accepted: 05/16/2024] [Indexed: 05/26/2024]
Abstract
A novel electrochemical biosensor was developed for the detection of epinephrine (EP) by immobilizing double-strand DNA (dsDNA) bound with copper ions on a gold electrode (Cu2+/dsDNA/MCH/AuE). The electrochemical behavior of EP at Cu2+/dsDNA/MCH/AuE was examined, and the results demonstrated a significant enhancement in the electrocatalytic oxidation peak current of EP due to the formation of a stable G-Cu(II)-G sandwich structure between Cu2+ and guanine at the modified electrode. The modification process of the electrode was characterized by scanning electron microscopy, infrared spectroscopy, electrochemical impedance spectroscopy, and differential pulse voltammetry. A study on the effect of pH in phosphate buffer solution on the electrochemical oxidation of EP indicated that the catalytic oxidation process was pH-dependent. A plot of catalytic current versus EP concentration exhibited a dual-linear relationship within two ranges: 1.0-12.5 μM and 12.5-1000.0 μM, with correlation coefficients of 0.995 and 0.997, respectively. The limit of detection was determined to be 47 nM (S/N = 3). According to the calculated Hill coefficient (0.99), it can be concluded that the electrocatalytic process followed the Michaelis-Menten kinetic mechanism. The maximum catalytic current Im was 25 μA, while the apparent Michaelis-Menten constant Km was 1.425 mM. These findings indicated excellent electrocatalytic activity of the modified electrode towards oxidation of EP. The developed biosensor successfully detected EP in spiked mouse serum as well as epinephrine hydrochloride injection with high selectivity, sensitivity, stability, and accuracy.
Collapse
Affiliation(s)
- Zhenbo Wang
- School of Pharmacy, Ningxia Medical University, Yinchuan, 750004, PR China
| | - Jing Chen
- School of Pharmacy, Ningxia Medical University, Yinchuan, 750004, PR China
| | - Hua Ma
- School of Pharmacy, Ningxia Medical University, Yinchuan, 750004, PR China
| | - Yaru Deng
- School of Pharmacy, Ningxia Medical University, Yinchuan, 750004, PR China
| | - Yafei Li
- School of Pharmacy, Ningxia Medical University, Yinchuan, 750004, PR China
| | - Lijie Geng
- School of Pharmacy, Ningxia Medical University, Yinchuan, 750004, PR China
| | - Yu Huang
- School of Pharmacy, Ningxia Medical University, Yinchuan, 750004, PR China; Key Laboratory of Protection, Development and Utilization of Medicinal Resources in Liupanshan Area Ministry of Education, Ningxia Medical University, Yinchuan, 750004, PR China; Collaborative Innovation Center for Ningxia Characteristic Traditional Chinese Medicine by Ningxia Hui Autonomous Region & Education Ministry of P.R. China, PR China; Ningxia Characteristic Traditional Chinese Medicine Modern Engineering and Technique Research Center, Ningxia Key Laboratory of Drug Development and Generic Drug Research, Key Laboratory of Ningxia Ethnomedicine Modernization, Ministry of Education, Yinchuan, 750004, PR China.
| | - Yanru Fan
- School of Pharmacy, Ningxia Medical University, Yinchuan, 750004, PR China; Key Laboratory of Protection, Development and Utilization of Medicinal Resources in Liupanshan Area Ministry of Education, Ningxia Medical University, Yinchuan, 750004, PR China; Collaborative Innovation Center for Ningxia Characteristic Traditional Chinese Medicine by Ningxia Hui Autonomous Region & Education Ministry of P.R. China, PR China; Ningxia Characteristic Traditional Chinese Medicine Modern Engineering and Technique Research Center, Ningxia Key Laboratory of Drug Development and Generic Drug Research, Key Laboratory of Ningxia Ethnomedicine Modernization, Ministry of Education, Yinchuan, 750004, PR China.
| |
Collapse
|
2
|
Zhang J, Liu Y, Yan Z, Wang Y, Guo P. A Novel Minidumbbell DNA-Based Sensor for Silver Ion Detection. BIOSENSORS 2023; 13:358. [PMID: 36979570 PMCID: PMC10046540 DOI: 10.3390/bios13030358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Revised: 03/02/2023] [Accepted: 03/03/2023] [Indexed: 06/18/2023]
Abstract
Silver ion (Ag+) is one of the most common heavy metal ions that cause environmental pollution and affect human health, and therefore, its detection is of great importance in the field of analytical chemistry. Here, we report an 8-nucleotide (nt) minidumbbell DNA-based sensor (M-DNA) for Ag+ detection. The minidumbbell contained a unique reverse wobble C·C mispair in the minor groove, which served as the binding site for Ag+. The M-DNA sensor could achieve a detection limit of 2.1 nM and sense Ag+ in real environmental samples with high accuracy. More importantly, the M-DNA sensor exhibited advantages of fast kinetics and easy operation owing to the usage of an ultrashort oligonucleotide. The minidumbbell represents a new and minimal non-B DNA structural motif for Ag+ sensing, allowing for the further development of on-site environmental Ag+ detection devices.
Collapse
Affiliation(s)
- Jiacheng Zhang
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China
- Zhejiang Cancer Hospital, Institute of Basic Medicine and Cancer (IBMC), Chinese Academy of Sciences, Hangzhou 310022, China
| | - Yuan Liu
- South China Advanced Institute for Soft Matter Science and Technology, School of Emergent Soft Matter, Guangdong Provincial Key Laboratory of Functional and Intelligent Hybrid Materials and Devices, South China University of Technology, Guangzhou 510640, China
| | - Zhenzhen Yan
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, China
- Zhejiang Cancer Hospital, Institute of Basic Medicine and Cancer (IBMC), Chinese Academy of Sciences, Hangzhou 310022, China
| | - Yue Wang
- Institute of Molecular Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, China
| | - Pei Guo
- Zhejiang Cancer Hospital, Institute of Basic Medicine and Cancer (IBMC), Chinese Academy of Sciences, Hangzhou 310022, China
| |
Collapse
|
3
|
Xiao Q, Chen M, Nie W, Xie F, Yu X, Ma C. A Fluorescent Biosensor for Streptavidin Detection Based on Double-Hairpin DNA-Templated Copper Nanoparticles. BIOSENSORS 2023; 13:168. [PMID: 36831934 PMCID: PMC9953726 DOI: 10.3390/bios13020168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 01/15/2023] [Accepted: 01/17/2023] [Indexed: 06/18/2023]
Abstract
In this paper, we developed a sensitive, label-free and facile fluorescent strategy for detecting streptavidin (SA) based on double-hairpin DNA-templated copper nanoparticles (CuNPs) and terminal protection of small molecule-linked DNA. Herein, a special DNA hairpin probe was designed and synthesized, which contained two poly T single-stranded loops and a nick point in the middle of the stem. Inspired by the concept of the terminal protection interaction, the specific binding of SA to the biotinylated DNA probe can prevent the exonuclease degradation and keep the integrity of DNA probe, which can be used for synthesizing fluorescent CuNPs as a template. Conversely, the DNA probe would be digested by exonucleases and therefore, would fail to form CuNPs without SA. After systematic optimization, the detection range of SA concentration is from 0.5 to 150 nM with a low detection limit of 0.09 nM. Additionally, the proposed method was also successfully applied in the biological samples. Finally, the proposed method is sensitive, effective and simple, and can be potentially applied for predicting diseases and discovering new drugs.
Collapse
Affiliation(s)
- Qiangsheng Xiao
- Department of Hepatobiliary and Pancreatic Surgery, The Third Xiangya Hospital of Central South University, Changsha 410013, China
| | - Mingjian Chen
- School of Life Sciences, Central South University, Changsha 410017, China
| | - Wanpin Nie
- Department of Hepatobiliary and Pancreatic Surgery, The Third Xiangya Hospital of Central South University, Changsha 410013, China
| | - Fengjiao Xie
- The Third Affiliated Hospital of Southern Medical University, Guangzhou 510640, China
| | - Xiao Yu
- Department of Hepatobiliary and Pancreatic Surgery, The Third Xiangya Hospital of Central South University, Changsha 410013, China
| | - Changbei Ma
- School of Life Sciences, Central South University, Changsha 410017, China
| |
Collapse
|
4
|
Chaperone Copolymer Assisted G-Quadruplex-Based Signal Amplification Assay for Highly Sensitive Detection of VEGF. BIOSENSORS 2022; 12:bios12050262. [PMID: 35624563 PMCID: PMC9138322 DOI: 10.3390/bios12050262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 04/10/2022] [Accepted: 04/19/2022] [Indexed: 11/17/2022]
Abstract
Vascular endothelial growth factor (VEGF) is a critical biomarker in the angiogenesis of several cancers. Nowadays, novel approaches to rapid, sensitive, and reliable VEGF detection are urgently required for early cancer diagnosis. Cationic comb-type copolymer, poly(L-lysine)-graft-dextran (PLL-g-Dex) accelerates DNA hybridization and chain exchange reaction while stabilizing the DNA assembly structure. In this work, we examined the chaperone activity of PLL-g-Dex to assist G-quadruplex-based fluorescent DNA biosensors for sensitive detection of VEGF. This convenient and effective strategy is based on chitosan hydrogel, c-myc, Thioflavin T (ThT), VEGF aptamer, and its partially complementary strand. The results show that chaperone copolymer PLL-g-Dex significantly promotes the accumulation of G-quadruplex and assembles into G-wires, allowing an effective signal amplification. Using this method, the detection limit of VEGF was as low as 23 pM, better than many previous works on aptamer-based VEGF detection. This chaperone copolymer-assisted signal amplification strategy has potential applications in the highly sensitive detection of target proteins, even including viruses.
Collapse
|