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Huang W, Cheng Y, Zhai J, Qin Y, Zhang W, Xie X. Expanded single-color barcoding in microspheres with fluorescence anisotropy for multiplexed biochemical detection. Analyst 2023; 148:4406-4413. [PMID: 37552039 DOI: 10.1039/d3an00938f] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/09/2023]
Abstract
Single-color barcoding strategies could break the limits of spectral crosstalk in conventional intensity-based fluorescence barcodes. Fluorescence anisotropy (FA), a self-referencing quantity able to differentiate spectrally similar fluorophores, is highly attractive in designing fluorescent barcodes within a limited emission window. In this study, FA-based encoding of polystyrene (PS) microspheres was realized for the first time. The FA signals of fluorophores were stabilized inside PS microspheres owing to hampered rotational motion. Fluorescent labels were incorporated with similar emission but different structures, symmetries, and lifetimes. On the one hand, Förster Resonance Energy Transfer (FRET) including homo-FRET and hetero-FRET resulted in a decrease of steady-state FA with increasing dye loading, converting conventional intensity-based codes into FA-based codes. On the other hand, mixing dyes with different intrinsic FA values generated different FA values at the same fluorescence intensity level. Single color 5-plex FA-encoded microspheres were demonstrated and decoded on a homemade microscopic FA imaging platform in real time. The FA-encoded microspheres were successfully applied to detect the oligonucleotide of the foodborne bacterium, Bacillus cereus, without spectral crosstalk between the encoding and reporting dyes. Overall, FA-based encoding with an expanded coding capacity in the FA dimension holds great potential in multiplexed high-throughput chemical and biological analyses.
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Affiliation(s)
- Wenyu Huang
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China.
| | - Yu Cheng
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China.
| | - Jingying Zhai
- Academy for Advanced Interdisciplinary Studies, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Yuemin Qin
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China.
| | - Weian Zhang
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China.
| | - Xiaojiang Xie
- Department of Chemistry, Southern University of Science and Technology, Shenzhen, 518055, China.
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2
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Qiu H, Ran Q, Bai Y, He W, Zheng L, Pan C, Jia K, Hu Y. Sub-micron microparticles with tunable fluorescence emission obtained via co-self-assembly of amidoximed polymeric ligands and lanthanide ions. Front Chem 2023; 11:1209264. [PMID: 37265591 PMCID: PMC10229811 DOI: 10.3389/fchem.2023.1209264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Accepted: 05/08/2023] [Indexed: 06/03/2023] Open
Abstract
Lanthanide coordinating polymeric microparticles have witnessed increasing research interests during the past decades due to their versatile morphology and tunable fluorescent properties. Herein, we have synthesized an amidoximed block copolymer containing aromatic backbone and pendent amidoxime as well as carboxyl groups, which has been employed as the ligand to sensitize the intrinsic fluorescence emission of lanthanide ions of Tb3+ and Eu3+. Furthermore, the lanthanide coordinating polymeric microparticles showing tunable green and red emission fluorescence have been prepared via the emulsion confinement co-self-assembly of amidoximed polymeric ligands with Tb3+ and Eu3+. It is found that both the fluorescence emission and sizes of obtained fluorescent microparticles can be easily modulated in a wide range by tuning concentration of polymers and lanthanide ions, as well as emulsion evaporation temperature. Thanks to their tunable sizes (250-900 nm), fluorescence emission as well as presence of surface active functional groups, the present fluorescent microparticles would find potential applications in in-vitro detection, optical encoding and devices.
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Affiliation(s)
- Huandi Qiu
- Department of Thyroid Surgery, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China
| | - Qimeng Ran
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, China
| | - Yun Bai
- Institute for Radiation Protection, Taiyuan, Shanxi, China
| | - Wei He
- Department of Thyroid Surgery, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China
| | - Li Zheng
- Department of Thyroid Surgery, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China
- Biomedical Research Center, Chengdu eBond Pharmaceutical Technology Ltd., Chengdu, China
| | - Cong Pan
- Biomedical Research Center, Chengdu eBond Pharmaceutical Technology Ltd., Chengdu, China
- Guizhou Kangqinchengping Biotechnology Company, Guiyang, Guizhou, China
| | - Kun Jia
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, China
| | - Yiguo Hu
- Department of Thyroid Surgery, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, China
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3
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Gu Z, Sun T, Guo Q, Wang Y, Ge Y, Gu H, Xu G, Xu H. Bead-Based Multiplexed Droplet Digital Polymerase Chain Reaction in a Single Tube Using Universal Sequences: An Ultrasensitive, Cross-Reaction-Free, and High-Throughput Strategy. ACS Sens 2022; 7:2759-2766. [PMID: 36041054 DOI: 10.1021/acssensors.2c01415] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The multiplexed digital polymerase chain reaction (PCR) is widely used in molecular diagnosis owing to its high sensitivity and throughput for multiple target detection compared with the single-plexed digital PCR; however, current multiplexed digital PCR technologies lack efficient coding strategies that do not compromise the sensitivity and signal-to-noise (S/N) ratio. Hence, we propose a fluorescent-encoded bead-based multiplexed droplet digital PCR method for ultra-high coding capacity, along with the creative design of universal sequences (primer and fluorescent TaqMan probe) for ultra-sensitivity and high S/N ratios. First, pre-amplification is used to introduce universal primers and universal fluorescent TaqMan probes to reduce primer interference and background noise, as well as to enrich regions of interest in targeted analytes. Second, fluorescent-encoded beads (FEBs), coupled with the corresponding target sequence-specific capture probes through streptavidin-biotin conjugation, are used to partition amplicons via hybridization according to the Poisson distribution. Finally, FEBs mixed with digital PCR mixes are isolated into droplets generated via Sapphire chips (Naica Crystal Digital PCR system) to complete the digital PCR and result analysis. For proof of concept, we demonstrate that this method achieves high S/N ratios in a 5-plexed assay for influenza viruses and SARS-CoV-2 at concentrations below 10 copies and even close to a single molecule per reaction without cross-reaction, further verifying the possibility of clinical actual sample detection with 100% accuracy, which paves the way for the realization of digital PCR with ultrahigh coding capacity and ultra-sensitivity.
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Affiliation(s)
- Zhejia Gu
- School of Biomedical Engineering/Med-X Research Institute, Shanghai Jiao Tong University, Shanghai 200030, P. R. China
| | - Tong Sun
- School of Biomedical Engineering/Med-X Research Institute, Shanghai Jiao Tong University, Shanghai 200030, P. R. China
| | - Qingsheng Guo
- School of Biomedical Engineering/Med-X Research Institute, Shanghai Jiao Tong University, Shanghai 200030, P. R. China
| | - Yao Wang
- School of Biomedical Engineering/Med-X Research Institute, Shanghai Jiao Tong University, Shanghai 200030, P. R. China
| | - Yunfei Ge
- School of Biomedical Engineering/Med-X Research Institute, Shanghai Jiao Tong University, Shanghai 200030, P. R. China
| | - Hongchen Gu
- School of Biomedical Engineering/Med-X Research Institute, Shanghai Jiao Tong University, Shanghai 200030, P. R. China
| | - Gaolian Xu
- School of Biomedical Engineering/Med-X Research Institute, Shanghai Jiao Tong University, Shanghai 200030, P. R. China
| | - Hong Xu
- School of Biomedical Engineering/Med-X Research Institute, Shanghai Jiao Tong University, Shanghai 200030, P. R. China
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4
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Yue X, Fang X, Sun T, Yi J, Kuang X, Guo Q, Wang Y, Gu H, Xu H. Breaking through the Poisson Distribution: A compact high-efficiency droplet microfluidic system for single-bead encapsulation and digital immunoassay detection. Biosens Bioelectron 2022; 211:114384. [DOI: 10.1016/j.bios.2022.114384] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 04/25/2022] [Accepted: 05/14/2022] [Indexed: 11/02/2022]
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5
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Feng Z, Guo Q, Wang Y, Ge Y, Zhang Z, Wu Y, Li Q, Masoomi H, Gu H, Xu H. Evolution of "On-Barcode" Luminescence Oxygen Channeling Immunoassay by Exploring the Barcode Structure and the Assay System. ACS OMEGA 2022; 7:2344-2355. [PMID: 35071922 PMCID: PMC8772307 DOI: 10.1021/acsomega.1c06236] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Accepted: 12/23/2021] [Indexed: 06/14/2023]
Abstract
The multiplexed luminescence oxygen channeling immunoassay (multi-LOCI) platform we developed recently that combines conventional LOCI and suspension array technology is capable of realizing facile "mix-and-measure" multiplexed assays without tedious washing steps. However, previous work lacks comprehensive studies of the structure-performance relationship of the host-guest-structured barcode, which may obstruct the evolution and further translation of this exciting new technology to practical applications. Accordingly, this work revealed that polyelectrolyte interlayers played a crucial role in tuning the packing density of guest acceptor beads (ABs). More interestingly, we noticed that "sparse" barcodes (barcodes with low ABs packing density) exhibited comparable assay performance with "compact" ones (barcodes with high ABs packing density). The high robustness of barcodes allows for multi-LOCI to be a more universal and flexible assay platform. Furthermore, through optimization of the assay system including the laser power, as well as the concentrations of donor beads and biotinylated detection antibodies, the multi-LOCI platform showed a significant improvement in sensitivity compared with our previous work, with the limit of detection decreasing to as low as ca. 1 pg/mL. Impressively, multi-LOCI that enabled simultaneous detection of multiple analytes exhibited comparable sensitivity with the classical single-plexed LOCI, due to the ingenious structural design of the multi-LOCI barcode and the unique "on-barcode" assay format.
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Affiliation(s)
- Zuying Feng
- School
of Biomedical Engineering, Shanghai Jiao
Tong University, Shanghai 200030, P. R. China
| | - Qingsheng Guo
- School
of Biomedical Engineering, Shanghai Jiao
Tong University, Shanghai 200030, P. R. China
| | - Yao Wang
- School
of Biomedical Engineering, Shanghai Jiao
Tong University, Shanghai 200030, P. R. China
| | - Yunfei Ge
- School
of Biomedical Engineering, Shanghai Jiao
Tong University, Shanghai 200030, P. R. China
| | - Zhiying Zhang
- School
of Biomedical Engineering, Shanghai Jiao
Tong University, Shanghai 200030, P. R. China
| | - Yan Wu
- School
of Biomedical Engineering, Shanghai Jiao
Tong University, Shanghai 200030, P. R. China
| | - Qilong Li
- School
of Biomedical Engineering, Shanghai Jiao
Tong University, Shanghai 200030, P. R. China
| | - Hajar Masoomi
- School
of Biomedical Engineering, Shanghai Jiao
Tong University, Shanghai 200030, P. R. China
- School
of Integrated Technology, Gwangju Institute
of Science and Technology, Gwangju 61005, South Korea
| | - Hongchen Gu
- School
of Biomedical Engineering, Shanghai Jiao
Tong University, Shanghai 200030, P. R. China
| | - Hong Xu
- School
of Biomedical Engineering, Shanghai Jiao
Tong University, Shanghai 200030, P. R. China
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6
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Shao S, Man H, Nie Y, Wang Y, Xu Q, Wang Z, Jiang Y. Preparation of fluorescence-encoded microbeads with large encoding capacities and application of suspension array technology. NEW J CHEM 2022. [DOI: 10.1039/d2nj00628f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This research study reported a type of reconstructed polystyrene microbeads for fluorescence encoding in suspension array technology (SAT). The present study improved their surface functionalization and compatibility with dyes.
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Affiliation(s)
- Shimin Shao
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
| | - Hong Man
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
| | - Yingrui Nie
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
| | - Yang Wang
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
| | - Qianrui Xu
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
| | - Zhifei Wang
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
| | - Yong Jiang
- School of Chemistry and Chemical Engineering, Southeast University, Nanjing 211189, China
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