1
|
Ren K, Duan M, Su T, Ying D, Wu S, Wang Z, Duan N. A colorimetric and SERS dual-mode aptasensor for the detection of Shiga toxin type II based on Mn/Fe-MIL(53)@AuNSs. Talanta 2024; 270:125636. [PMID: 38211356 DOI: 10.1016/j.talanta.2024.125636] [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: 12/05/2023] [Revised: 12/29/2023] [Accepted: 01/04/2024] [Indexed: 01/13/2024]
Abstract
Shiga toxin type II (Stx2), the major virulence component of enterohemorrhagic Escherichia coli, is strongly associated with the life-threatening hemolytic uremic syndrome thus posing a substantial risk to food safety and human health. In this work, a dual-mode aptasensor with colorimetric and surface-enhanced Raman scattering was developed for Stx2 specific detection based on noble metal nanoparticles and Raman reporter loaded metal-organic framework (Mn/Fe-MIL(53)@AuNSs-MBA). The Mn/Fe-MIL(53)@AuNSs could catalyze the H2O2-mediated oxidation of 3,3',5,5'-tetramethylbenzidine (TMB), thereby enabling visual detection. Meanwhile, the SERS signal from MBA can be enhanced by the decorated AuNSs. Under optimal conditions, a linear range of 0.05-500 ng/mL with limit of detection (LOD) of 26 pg/mL was achieved in colorimetric mode and a linear range of 5-1000 ng/mL with LOD of 0.82 ng/mL in SERS mode, in which the dual-mode results complement each other, widening the linear range, increasing the accuracy and reliability of the detection. The method was further applied to the detection of Stx2 in milk with average recovery of 101.1 %, demonstrating its superior potential for bacterial toxin monitoring.
Collapse
Affiliation(s)
- Kexin Ren
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
| | - Mengxia Duan
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
| | - Tingting Su
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
| | - Dichen Ying
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China
| | - Shijia Wu
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, 214122, China
| | - Zhouping Wang
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, 214122, China
| | - Nuo Duan
- State Key Laboratory of Food Science and Resources, Jiangnan University, Wuxi, 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, 214122, China; International Joint Laboratory on Food Safety, Jiangnan University, Wuxi, 214122, China.
| |
Collapse
|
2
|
Duan Y, Liu F, Zhang C, Wang Y, Chen G. Screen and Optimization of an Aptamer for Alexandrium tamarense-A Common Toxin-Producing Harmful Alga. MARINE BIOTECHNOLOGY (NEW YORK, N.Y.) 2023; 25:935-950. [PMID: 37743437 DOI: 10.1007/s10126-023-10251-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Accepted: 09/01/2023] [Indexed: 09/26/2023]
Abstract
Among all the paralytic shellfish toxins (PSTs)-producing algae, Alexandrium tamarense is one of the most widespread harmful species posing a serious threat to marine resources and human health. Therefore, it is extremely important to establish a rapid and accurate monitoring method for A. tamarense that can provide early warnings of harmful algal blooms (HABs) caused by this alga and limit the contamination due to PSTs. In this study, an ssDNA library was first obtained by whole cell systematic evolution of ligands by exponential enrichment after 18 consecutive rounds of iterative screening. After sequencing in combination with subsequent multiple alignment of sequences and secondary structure simulation, the library could be classified into 2 families, namely, Family1 and Family2, according to sequence similarity. Flow cytometry was used to test the affinity and cross-reactivity of Ata19, Ata6, Ata25 and Ata29 belonging to Family2. Ata19 was selected to be modified by truncation, through which a new resultant aptamer named as Ata19-1-1 was obtained. Ata19-1-1 with a KD of 75.16 ± 11.10 nM displayed a much higher affinity than Ata19. The specificity test showed that Ata19-1-1 has the same discrimination ability as Ata19 and can at least distinguish the target microalga from other microalgae. The observation under a fluorescence microscopy showed that the A. tamarense cells labeled with Ata19-1-1 are exhibiting bright green fluorescence and could be easily identified, factually confirming the binding of the aptamer with target cells. In summary, the aptamer Ata19-1-1 produced in this study may serve as an ideal molecular recognition element for A. tamarense, which has the potential to be developed into a novel detection method for this harmful alga in the future.
Collapse
Affiliation(s)
- Yu Duan
- School of Marine Science and Technology, Harbin Institute of Technology (Weihai), Wenhua West Road, 2#, Weihai, 264209, People's Republic of China
- School of Environment, Harbin Institute of Technology, Harbin, 150001, People's Republic of China
| | - Fuguo Liu
- School of Marine Science and Technology, Harbin Institute of Technology (Weihai), Wenhua West Road, 2#, Weihai, 264209, People's Republic of China
- School of Environment, Harbin Institute of Technology, Harbin, 150001, People's Republic of China
| | - Chunyun Zhang
- School of Marine Science and Technology, Harbin Institute of Technology (Weihai), Wenhua West Road, 2#, Weihai, 264209, People's Republic of China.
| | - Yuanyuan Wang
- School of Marine Science and Technology, Harbin Institute of Technology (Weihai), Wenhua West Road, 2#, Weihai, 264209, People's Republic of China
| | - Guofu Chen
- School of Marine Science and Technology, Harbin Institute of Technology (Weihai), Wenhua West Road, 2#, Weihai, 264209, People's Republic of China.
- School of Environment, Harbin Institute of Technology, Harbin, 150001, People's Republic of China.
| |
Collapse
|
3
|
You R, Wang H, Wang C, Huang J, Zhu H, Liu Y, Zhang JH, Liu J, Yu X, Lu Y. Bacterial cellulose loaded with silver nanoparticles as a flexible, stable and sensitive SERS-active substrate for detection of the shellfish toxin DTX-1. Food Chem 2023; 427:136692. [PMID: 37364315 DOI: 10.1016/j.foodchem.2023.136692] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 06/10/2023] [Accepted: 06/18/2023] [Indexed: 06/28/2023]
Abstract
Diarrheal shellfish toxins are considered one of the most lethal red tide algae toxins in the worldwide. In this work, we propose an Ag NPs-loaded bacterial cellulose membrane (BCM) surface-enhanced Raman scattering (SERS) sensor based on an aptamer (Apt) for the ultrasensitive detection of dinophysistoxin (DTX-1), a type of diarrheal shellfish toxin. During drying, Ag NPs can be further densified on "gel-like" BCM to form high-density SERS "hot spots". We developed the "Apt-SH@Ag NPs@BCM" SERS sensor and used the competition of DTX-1 and complementary base (Cob) in the process of base complementary pairing to achieve SERS detection of DTX-1, with a minimum detection limit of 9.5 × 10-10 mol/L. Sample assays showed DTX-1 recovery rates ranging from 95.8% and 108.2% and the detection results were comparable to those obtained by LC-MS. Therefore, this work holds great potential for detecting of toxic substances in shellfish products, especially for the oyster (portuguese oyster) and mussel (blue mussel).
Collapse
Affiliation(s)
- Ruiyun You
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, Engineering Research Center of Industrial Biocatalysis, Fujian Province Higher Education Institutes, Fujian Normal University, Fuzhou, Fujian 350007, China
| | - Haonan Wang
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, Engineering Research Center of Industrial Biocatalysis, Fujian Province Higher Education Institutes, Fujian Normal University, Fuzhou, Fujian 350007, China; School of Resources and Chemical Engineering, Sanming University, Sanming, Fujian 365004, China
| | - Chuyi Wang
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, Engineering Research Center of Industrial Biocatalysis, Fujian Province Higher Education Institutes, Fujian Normal University, Fuzhou, Fujian 350007, China
| | - Jiali Huang
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, Engineering Research Center of Industrial Biocatalysis, Fujian Province Higher Education Institutes, Fujian Normal University, Fuzhou, Fujian 350007, China
| | - Huina Zhu
- Integrated Technique Services Center of Dong Shan Customs, Zhangzhou, Fujian 363401, China
| | - Yunzhen Liu
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, Engineering Research Center of Industrial Biocatalysis, Fujian Province Higher Education Institutes, Fujian Normal University, Fuzhou, Fujian 350007, China
| | - Jian-Han Zhang
- School of Resources and Chemical Engineering, Sanming University, Sanming, Fujian 365004, China.
| | - Jiewen Liu
- Integrated Technique Services Center of Dong Shan Customs, Zhangzhou, Fujian 363401, China
| | - Xiaowei Yu
- Integrated Technique Services Center of Dong Shan Customs, Zhangzhou, Fujian 363401, China
| | - Yudong Lu
- College of Chemistry and Materials Science, Fujian Provincial Key Laboratory of Advanced Oriented Chemical Engineer, Fujian Key Laboratory of Polymer Materials, Engineering Research Center of Industrial Biocatalysis, Fujian Province Higher Education Institutes, Fujian Normal University, Fuzhou, Fujian 350007, China.
| |
Collapse
|
4
|
Liu F, Zhang C, Duan Y, Ma J, Wang Y, Chen G. A detection method for Prorocentrum minimum by an aptamer-gold nanoparticles based colorimetric assay. JOURNAL OF HAZARDOUS MATERIALS 2023; 449:131043. [PMID: 36827721 DOI: 10.1016/j.jhazmat.2023.131043] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 02/16/2023] [Accepted: 02/17/2023] [Indexed: 06/18/2023]
Abstract
Here, to give early waring for harmful algal blooms caused by Prorocentrum minimum, we reported a simple and rapid colorimetric assay that is named aptamer-gold nanoparticles (GNPs) based colorimetric assay (AGBCA). The GNPs maintain a dispersed state and have a strong characteristic absorption peak at 520 nm. With the addition of NaCl, the stability of the solution will be destroyed and the dispersed GNPs will aggregate. Therefore, the characteristic absorption peak of the GNPs solution will change from 520 nm to 670 nm. Aptamers can be adsorbed on the surface of GNPs, effectively preventing the aggregation of GNPs. In the presence of P. minimum, aptamers will specifically bind to P. minimum, causing the dissociation of the aptamers from GNPs. Consequently, the GNPs will aggregate in the NaCl solution, corresponding to a new absorption peak at 670 nm. A linear relationship between the absorbance ratio variation (ΔA670/A520) and the P. minimum concentration was observed in the concentration range of 1 × 102 - 1 × 107 cells mL-1, with a low detection limit of 8 cells mL-1. The developed AGBCA is characterized by simplicity, strong specificity, and high sensitivity and is thus promising for the quantitative detection of P. minimum in natural samples.
Collapse
Affiliation(s)
- Fuguo Liu
- School of Marine Science and Technology, Harbin Institute of Technology (Weihai), Weihai 264209, PR China; School of Environment, Harbin Institute of Technology, Harbin 150090, PR China
| | - Chunyun Zhang
- School of Marine Science and Technology, Harbin Institute of Technology (Weihai), Weihai 264209, PR China.
| | - Yu Duan
- School of Environment, Harbin Institute of Technology, Harbin 150090, PR China
| | - Jinju Ma
- School of Environment, Harbin Institute of Technology, Harbin 150090, PR China
| | - Yuanyuan Wang
- School of Marine Science and Technology, Harbin Institute of Technology (Weihai), Weihai 264209, PR China
| | - Guofu Chen
- School of Marine Science and Technology, Harbin Institute of Technology (Weihai), Weihai 264209, PR China
| |
Collapse
|
5
|
Liu F, Zhang C, Duan Y, Ma J, Wang Y, Chen G. Optimization of an aptamer against Prorocentrum minimum - A common harmful algae by truncation and G-quadruplex-forming mutation. ENVIRONMENTAL RESEARCH 2023; 220:115099. [PMID: 36563978 DOI: 10.1016/j.envres.2022.115099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2022] [Revised: 11/22/2022] [Accepted: 12/16/2022] [Indexed: 06/17/2023]
Abstract
Harmful algal blooms (HABs) caused by Prorocentrum minimum have seriously posed economic losses and ecological disasters. To reduce these losses, aptamers are used as a new molecular probe to establish rapid methods. Herein, to improve the affinity and application of aptamers in the detection of harmful algae, the optimization was performed on the previously reported aptamers against P. minimum. First, a total of seven candidate aptamers, including three truncated aptamers (TA1, TA2 and TA3) and four mutant aptamers (MA1, MA2, MA3 and MA4), were obtained by truncation and G-quadruplex (GQ)-forming mutation. Next, the specificity and affinity test by flow cytometry revealed that except for TA1 and TA2, all of the candidate aptamers are specific with the equilibrium dissociation constant of (40.4 ± 5.5) nM for TA3, (63.3 ± 24.0) nM for MA1, (71.7 ± 14.6) nM for MA2, (365.9 ± 74.4) nM for MA3, and (21.1 ± 0.5) nM for MA4, respectively. The circular dichroism analysis of the mutant aptamers demonstrated that the GQ structures formed by MA1/MA2, MA3 and MA4 were antiparallel, mixed parallel and parallel, respectively. The affinity of aptamers with various GQ is in the order of parallel structure > antiparallel structure > mixed parallel structure. In addition, to further improve binding ability, the binding conditions of MA4 were optimized as follows: binding time, 60 min; binding temperature, 37 °C; pH of the binding buffer, 7.5; and Na+/Mg2+ concentration in the binding buffer, 100 mM/0.5 mM. The binding examination by fluorescence microscopy showed that MA4 had a stronger binding ability to P. minimum than the original aptamer. Taken together, this study not only obtained an aptamer with higher affinity than the original aptamer, which laid a good foundation for subsequent application, but also may provide a feasible reference method for aptamer optimization.
Collapse
Affiliation(s)
- Fuguo Liu
- School of Marine Science and Technology, Harbin Institute of Technology (Weihai), Weihai, 264209, PR China; School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China
| | - Chunyun Zhang
- School of Marine Science and Technology, Harbin Institute of Technology (Weihai), Weihai, 264209, PR China
| | - Yu Duan
- School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China
| | - Jinju Ma
- School of Environment, Harbin Institute of Technology, Harbin, 150090, PR China
| | - Yuanyuan Wang
- School of Marine Science and Technology, Harbin Institute of Technology (Weihai), Weihai, 264209, PR China
| | - Guofu Chen
- School of Marine Science and Technology, Harbin Institute of Technology (Weihai), Weihai, 264209, PR China.
| |
Collapse
|