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Li Y, Xu Y, Soko WC, Bi H. Quantum dots (QDs) attached magnetic beads (MBs) for on-chip efficient capture and detection of bacteria in ready-to-eat (RTE) foods. Talanta 2024; 273:125880. [PMID: 38484499 DOI: 10.1016/j.talanta.2024.125880] [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: 01/18/2024] [Revised: 02/19/2024] [Accepted: 03/04/2024] [Indexed: 04/09/2024]
Abstract
In this study, we established a versatile and simple magnetic-assisted microfluidic method for fast bacterial detection. Quantum dots (QDs) were loaded onto magnetic beads (MBs) to construct performance enhanced on-chip capture of bacteria. Escherichia coli (E. coli), as a model bacterium was studied. CdSe QDs were deposited onto the surface of Fe3O4 MBs through layer-by-layer self-assembly to enhance the loading of antibodies (Abs). MBs functionalized with anti-E. coli antibody molecules in a micropillar-based microfluidic chip were utilized to capture E. coli, and matrix-assisted laser desorption ionization time-of-flight mass spectrometry (MALDI-TOF MS) was used for characterization of captured bacteria. This method was found capable of specifically isolating E. coli within the range of 1.0 to 1.0 × 109 CFU/mL, having a detection limit (LOD) of 10 CFU/mL. The average similarity score among mass spectra for the bacterial capture obtained in independent experiments is calculated as 0.97 ± 0.01 (n = 3), which shows this work's excellent reproducibility for bacterial capture. Bacterial growth on ready-to-eat (RTE) foods during its time of storage was successfully monitored. The present protocol has promising potential for microbial control and pathogen detection in the food industry.
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Affiliation(s)
- Yunxing Li
- College of Food Science and Technology, Shanghai Ocean University (SHOU), Hucheng Ring Road 999, Pudong New District, 201306, Shanghai, China.
| | - Yihong Xu
- College of Food Science and Technology, Shanghai Ocean University (SHOU), Hucheng Ring Road 999, Pudong New District, 201306, Shanghai, China.
| | - Winnie C Soko
- College of Food Science and Technology, Shanghai Ocean University (SHOU), Hucheng Ring Road 999, Pudong New District, 201306, Shanghai, China.
| | - Hongyan Bi
- College of Food Science and Technology, Shanghai Ocean University (SHOU), Hucheng Ring Road 999, Pudong New District, 201306, Shanghai, China.
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Ilieş BD, Yildiz I, Abbas M. Peptide-conjugated Nanoparticle Platforms for Targeted Delivery, Imaging, and Biosensing Applications. Chembiochem 2024; 25:e202300867. [PMID: 38551557 DOI: 10.1002/cbic.202300867] [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: 12/25/2023] [Revised: 03/09/2024] [Indexed: 04/24/2024]
Abstract
Peptides have become an indispensable tool in engineering of multifunctional nanostructure platforms for biomedical applications such as targeted drug and gene delivery, imaging and biosensing. They can be covalently incorporated into a variety of nanoparticles (NPs) including polymers, metallic nanoparticles, and others. Using different bioconjugation techniques, multifunctional peptide-modified NPs can be formulated to produce therapeutical and diagnostic platforms offering high specificity, lower toxicity, biocompatibility, and stimuli responsive behavior. Targeting peptides can direct the nanoparticles into specific tissues for targeted drug and gene delivery and imaging applications due to their specificity towards certain receptors. Furthermore, due to their stimuli-responsive features, they can offer controlled release of therapeutics into desired sites of disease. In addition, peptide-based biosensors and imaging agents can provide non-invasive detection and monitoring of diseases including cancer, infectious diseases, and neurological disorders. In this review, we covered the design and formulation of recent peptide-based NP platforms, as well as their utilization in in vitro and in vivo applications such as targeted drug and gene delivery, targeting, sensing, and imaging applications. In the end, we provided the future outlook to design new peptide conjugated nanomaterials for biomedical applications.
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Affiliation(s)
- Bogdan Dragoş Ilieş
- Department of Chemistry, Khalifa University of Science and Technology, P.O. Box, 127788, Abu Dhabi, UAE
- Functional Biomaterials Group, Khalifa University of Science and Technology, P.O. Box, 127788, Abu Dhabi, UAE
| | - Ibrahim Yildiz
- Department of Chemistry, Khalifa University of Science and Technology, P.O. Box, 127788, Abu Dhabi, UAE
- Functional Biomaterials Group, Khalifa University of Science and Technology, P.O. Box, 127788, Abu Dhabi, UAE
| | - Manzar Abbas
- Department of Chemistry, Khalifa University of Science and Technology, P.O. Box, 127788, Abu Dhabi, UAE
- Functional Biomaterials Group, Khalifa University of Science and Technology, P.O. Box, 127788, Abu Dhabi, UAE
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Liu Y, Zhong D, Yu L, Shi Y, Xu Y. Primary Amine Functionalized Carbon Dots for Dead and Alive Bacterial Imaging. NANOMATERIALS (BASEL, SWITZERLAND) 2023; 13:437. [PMID: 36770398 PMCID: PMC9920602 DOI: 10.3390/nano13030437] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Revised: 01/16/2023] [Accepted: 01/18/2023] [Indexed: 06/18/2023]
Abstract
Small molecular dyes are commonly used for bacterial imaging, but they still meet a bottleneck of biological toxicity and fluorescence photobleaching. Carbon dots have shown high potential for bio-imaging due to their low cost and negligible toxicity and anti-photobleaching. However, there is still large space to enhance the quantum yield of the carbon quantum dots and to clarify their mechanisms of bacterial imaging. Using carbon dots for dyeing alive bacteria is difficult because of the thick density and complicated structure of bacterial cell walls. In this work, both dead or alive bacterial cell imaging can be achieved using the primary amine functionalized carbon dots based on their small size, excellent quantum yield and primary amine functional groups. Four types of carbon quantum dots were prepared and estimated for the bacterial imaging. It was found that the spermine as one of precursors can obviously enhance the quantum yield of carbon dots, which showed a high quantum yield of 66.46% and high fluorescence bleaching-resistance (70% can be maintained upon 3-h-irradiation). Furthermore, a mild modifying method was employed to bound ethylenediamine on the surface of the spermine-carbon dots, which is favorable for staining not only the dead bacterial cells but also the alive ones. Investigations of physical structure and chemical groups indicated the existence of primary amine groups on the surface of spermine-carbon quantum dots (which own a much higher quantum yield) which can stain alive bacterial cells visibly. The imaging mechanism was studied in detail, which provides a preliminary reference for exploring efficient and environment-friendly carbon dots for bacterial imaging.
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Affiliation(s)
- Yuting Liu
- Institute of Biomedical Engineering, College of Life Science, Basic Medical College, Qingdao University, Qingdao 266071, China
| | - Di Zhong
- Department of Genetics and Cell Biology, Basic Medical College, Qingdao University, No. 308 Ningxia Road, Qingdao 266000, China
| | - Lei Yu
- Institute of Biomedical Engineering, College of Life Science, Basic Medical College, Qingdao University, Qingdao 266071, China
| | - Yanfeng Shi
- Institute of Biomedical Engineering, College of Life Science, Basic Medical College, Qingdao University, Qingdao 266071, China
| | - Yuanhong Xu
- Institute of Biomedical Engineering, College of Life Science, Basic Medical College, Qingdao University, Qingdao 266071, China
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Zheng Y, Song K, Cai K, Liu L, Tang D, Long W, Zhai B, Chen J, Tao Y, Zhao Y, Liang S, Huang Q, Liu Q, Zhang Q, Chen Y, Liu Y, Li H, Wang P, Lan K, Liu H, Xu K. B-Cell-Epitope-Based Fluorescent Quantum Dot Biosensors for SARS-CoV-2 Enable Highly Sensitive COVID-19 Antibody Detection. Viruses 2022; 14:v14051031. [PMID: 35632772 PMCID: PMC9145955 DOI: 10.3390/v14051031] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 04/11/2022] [Accepted: 05/06/2022] [Indexed: 12/21/2022] Open
Abstract
A new antibody diagnostic assay with more rapid and robust properties is demanded to quantitatively evaluate anti-severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) immunity in a large population. Here, we developed a nanometer-scale fluorescent biosensor system consisting of CdSe-ZnS quantum dots (QDs) coupled with the highly sensitive B-cell epitopes of SARS-CoV-2 that could remarkably identify the corresponding antibody with a detection limit of 100 pM. Intriguingly, we found that fluorescence quenching of QDs was stimulated more obviously when coupled with peptides than the corresponding proteins, indicating that the energy transfer between QDs and peptides was more effective. Compared to the traditional enzyme-linked immunosorbent assay (ELISA), the B-cell-epitope-based QD-biosensor could robustly distinguish coronavirus disease 2019 (COVID-19) antibody-positive patients from uninfected individuals with a higher sensitivity (92.3–98.1% positive rates by QD-biosensor vs. 78.3–83.1% positive rates by ELISAs in 207 COVID-19 patients’ sera) in a more rapid (5 min) and labor-saving manner. Taken together, the ‘QD-peptides’ biosensor provided a novel real-time, quantitative, and high-throughput method for clinical diagnosis and home-use tests.
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Affiliation(s)
- Yucheng Zheng
- State Key Laboratory of Virology, Institute for Vaccine Research, College of Life Sciences, Wuhan University, Wuhan 430072, China; (Y.Z.); (K.S.); (D.T.); (S.L.); (Q.L.); (Q.Z.); (Y.C.); (Y.L.); (K.L.)
| | - Kun Song
- State Key Laboratory of Virology, Institute for Vaccine Research, College of Life Sciences, Wuhan University, Wuhan 430072, China; (Y.Z.); (K.S.); (D.T.); (S.L.); (Q.L.); (Q.Z.); (Y.C.); (Y.L.); (K.L.)
| | - Kun Cai
- Hubei Provincial Center for Diseases Control and Prevention, Wuhan 430079, China; (K.C.); (L.L.)
| | - Linlin Liu
- Hubei Provincial Center for Diseases Control and Prevention, Wuhan 430079, China; (K.C.); (L.L.)
| | - Dixiao Tang
- State Key Laboratory of Virology, Institute for Vaccine Research, College of Life Sciences, Wuhan University, Wuhan 430072, China; (Y.Z.); (K.S.); (D.T.); (S.L.); (Q.L.); (Q.Z.); (Y.C.); (Y.L.); (K.L.)
| | - Wenbo Long
- School of Optical and Electronic Information, Wuhan National Laboratory for Optoelectronics, Optics Valley Laboratory, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China; (W.L.); (B.Z.); (Y.T.); (Y.Z.); (Q.H.); (H.L.)
| | - Bohui Zhai
- School of Optical and Electronic Information, Wuhan National Laboratory for Optoelectronics, Optics Valley Laboratory, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China; (W.L.); (B.Z.); (Y.T.); (Y.Z.); (Q.H.); (H.L.)
| | - Jianjun Chen
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China;
| | - Yanbing Tao
- School of Optical and Electronic Information, Wuhan National Laboratory for Optoelectronics, Optics Valley Laboratory, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China; (W.L.); (B.Z.); (Y.T.); (Y.Z.); (Q.H.); (H.L.)
| | - Yunong Zhao
- School of Optical and Electronic Information, Wuhan National Laboratory for Optoelectronics, Optics Valley Laboratory, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China; (W.L.); (B.Z.); (Y.T.); (Y.Z.); (Q.H.); (H.L.)
| | - Simeng Liang
- State Key Laboratory of Virology, Institute for Vaccine Research, College of Life Sciences, Wuhan University, Wuhan 430072, China; (Y.Z.); (K.S.); (D.T.); (S.L.); (Q.L.); (Q.Z.); (Y.C.); (Y.L.); (K.L.)
| | - Qing Huang
- School of Optical and Electronic Information, Wuhan National Laboratory for Optoelectronics, Optics Valley Laboratory, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China; (W.L.); (B.Z.); (Y.T.); (Y.Z.); (Q.H.); (H.L.)
| | - Qianyun Liu
- State Key Laboratory of Virology, Institute for Vaccine Research, College of Life Sciences, Wuhan University, Wuhan 430072, China; (Y.Z.); (K.S.); (D.T.); (S.L.); (Q.L.); (Q.Z.); (Y.C.); (Y.L.); (K.L.)
| | - Qi Zhang
- State Key Laboratory of Virology, Institute for Vaccine Research, College of Life Sciences, Wuhan University, Wuhan 430072, China; (Y.Z.); (K.S.); (D.T.); (S.L.); (Q.L.); (Q.Z.); (Y.C.); (Y.L.); (K.L.)
| | - Yu Chen
- State Key Laboratory of Virology, Institute for Vaccine Research, College of Life Sciences, Wuhan University, Wuhan 430072, China; (Y.Z.); (K.S.); (D.T.); (S.L.); (Q.L.); (Q.Z.); (Y.C.); (Y.L.); (K.L.)
- Institute for Vaccine Research, Animal Biosafety Level 3 Laboratory, Wuhan University, Wuhan 430072, China
| | - Yingle Liu
- State Key Laboratory of Virology, Institute for Vaccine Research, College of Life Sciences, Wuhan University, Wuhan 430072, China; (Y.Z.); (K.S.); (D.T.); (S.L.); (Q.L.); (Q.Z.); (Y.C.); (Y.L.); (K.L.)
- Institute for Vaccine Research, Animal Biosafety Level 3 Laboratory, Wuhan University, Wuhan 430072, China
| | - Huayao Li
- School of Optical and Electronic Information, Wuhan National Laboratory for Optoelectronics, Optics Valley Laboratory, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China; (W.L.); (B.Z.); (Y.T.); (Y.Z.); (Q.H.); (H.L.)
| | - Ping Wang
- Department of Clinical Laboratory, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1277 Jiefang Avenue, Wuhan 430022, China;
| | - Ke Lan
- State Key Laboratory of Virology, Institute for Vaccine Research, College of Life Sciences, Wuhan University, Wuhan 430072, China; (Y.Z.); (K.S.); (D.T.); (S.L.); (Q.L.); (Q.Z.); (Y.C.); (Y.L.); (K.L.)
- Institute for Vaccine Research, Animal Biosafety Level 3 Laboratory, Wuhan University, Wuhan 430072, China
| | - Huan Liu
- School of Optical and Electronic Information, Wuhan National Laboratory for Optoelectronics, Optics Valley Laboratory, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan 430074, China; (W.L.); (B.Z.); (Y.T.); (Y.Z.); (Q.H.); (H.L.)
- Correspondence: (H.L.); (K.X.); Tel.: +86-27-87793936 (H.L.); +86-27-68756997 (K.X.); Fax: +86-27-68754592 (K.X.)
| | - Ke Xu
- State Key Laboratory of Virology, Institute for Vaccine Research, College of Life Sciences, Wuhan University, Wuhan 430072, China; (Y.Z.); (K.S.); (D.T.); (S.L.); (Q.L.); (Q.Z.); (Y.C.); (Y.L.); (K.L.)
- Institute for Vaccine Research, Animal Biosafety Level 3 Laboratory, Wuhan University, Wuhan 430072, China
- Correspondence: (H.L.); (K.X.); Tel.: +86-27-87793936 (H.L.); +86-27-68756997 (K.X.); Fax: +86-27-68754592 (K.X.)
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