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Gallaga-González U, Morales-Avila E, Torres-García E, Estrada JA, Díaz-Sánchez LE, Izquierdo G, Aranda-Lara L, Isaac-Olivé K. Photoactivation of Chemotherapeutic Agents with Cerenkov Radiation for Chemo-Photodynamic Therapy. ACS OMEGA 2022; 7:23591-23604. [PMID: 35847323 PMCID: PMC9280781 DOI: 10.1021/acsomega.2c02153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Cerenkov radiation (CR) can be used as an internal light source in photodynamic therapy (PDT). Methotrexate (MTX) and paclitaxel (PTX), chemotherapeutic agents with wide clinical use, have characteristics of photosensitizers (PS). This work evaluates the possibility of photoexciting MTX and PTX with CR from 18F-FDG to produce reactive oxygen species (ROS) capable of inducing cytotoxicity. PTX did not produce ROS when excited by CR from 18F-FDG, so it is not useful for PDT. In contrast, MTX produces 1O2 (detected by ABMA) in amounts sufficient to significantly decrease the viability of the T47D cells. MTX solutions of 100 nM combined with 18F-FDG activities of 50 (1.85 MBq) and 100 μCi (3.7 MBq) produced a significant decrease in cell viability to (50.09 ± 4.95) and (47.96 ± 11.19)%, respectively, compared to MTX (66.29 ± 5.92)% and 18F-FDG (91.35 ± 7.00% for 50 μCi and 99.43 ± 11.03% for 100 μCi) alone. Using the CellRox Green reagent, the intracellular production of ROS was confirmed as the main mechanism of cytotoxicity. The results confirm the therapeutic potential of photoactivation with CR and the synergy of the combined treatment with chemotherapy + photodynamic therapy (CMT + PDT). The combination of chemotherapeutic agents with PS properties and β-emitting radiopharmaceuticals, previously approved for clinical use, will make it possible to shorten the evaluation stages of new CMT + PDT systems.
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Affiliation(s)
- Uriel Gallaga-González
- Laboratorio
de Investigación Teranóstica. Facultad de Medicina, Universidad Autónoma del Estado de México, Toluca, 50180 Estado de México, México
| | - Enrique Morales-Avila
- Laboratorio
de Toxicología y Farmacia,
Facultad de Química, Universidad
Autónoma del Estado de México, Toluca, 50120 Estado de México, México
| | - Eugenio Torres-García
- Laboratorio
de Dosimetría y Simulación Monte Carlo, Facultad de
Medicina, Universidad Autónoma del
Estado de México, Toluca, 50180 Estado de México, México
| | - José A. Estrada
- Laboratorio
de Neuroquímica, Facultad de Medicina, Universidad Autónoma del Estado de México, Toluca, 50180 Estado de México, México
| | - Luis Enrique Díaz-Sánchez
- Facultad
de Ciencias, Universidad Autónoma
del Estado de México, Toluca, 50120 Estado de México, México
| | - German Izquierdo
- Facultad
de Ciencias, Universidad Autónoma
del Estado de México, Toluca, 50120 Estado de México, México
| | - Liliana Aranda-Lara
- Laboratorio
de Investigación Teranóstica. Facultad de Medicina, Universidad Autónoma del Estado de México, Toluca, 50180 Estado de México, México
| | - Keila Isaac-Olivé
- Laboratorio
de Investigación Teranóstica. Facultad de Medicina, Universidad Autónoma del Estado de México, Toluca, 50180 Estado de México, México
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2
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Wang KN, Liu LY, Mao D, Hou MX, Tan CP, Mao ZW, Liu B. A Nuclear-Targeted AIE Photosensitizer for Enzyme Inhibition and Photosensitization in Cancer Cell Ablation. Angew Chem Int Ed Engl 2022; 61:e202114600. [PMID: 35132748 DOI: 10.1002/anie.202114600] [Citation(s) in RCA: 34] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Indexed: 12/24/2022]
Abstract
The nucleus is considered the ideal target for anti-tumor therapy because DNA and some enzymes in the nucleus are the main causes of cell canceration and malignant proliferation. However, nuclear target drugs with good biosafety and high efficiency in cancer treatment are rare. Herein, a nuclear-targeted material MeTPAE with aggregation-induced emission (AIE) characteristics was developed based on a triphenylamine structure skeleton. MeTPAE can not only interact with histone deacetylases (HDACs) to inhibit cell proliferation but also damage telomere and nucleic acids precisely through photodynamic treatment (PDT). The cocktail strategy of MeTPAE caused obvious cell cycle arrest and showed excellent PDT anti-tumor activity, which offered new opportunities for the effective treatment of malignant tumors.
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Affiliation(s)
- Kang-Nan Wang
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, State Key Laboratory of Oncology in South China, Sun Yat-Sen University, China.,Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117585, Singapore
| | - Liu-Yi Liu
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, State Key Laboratory of Oncology in South China, Sun Yat-Sen University, China
| | - Duo Mao
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117585, Singapore
| | - Ming-Xuan Hou
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, State Key Laboratory of Oncology in South China, Sun Yat-Sen University, China
| | - Cai-Ping Tan
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, State Key Laboratory of Oncology in South China, Sun Yat-Sen University, China
| | - Zong-Wan Mao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry, State Key Laboratory of Oncology in South China, Sun Yat-Sen University, China
| | - Bin Liu
- Department of Chemical and Biomolecular Engineering, National University of Singapore, 4 Engineering Drive 4, Singapore, 117585, Singapore
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3
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Wang K, Liu L, Mao D, Hou M, Tan C, Mao Z, Liu B. A Nuclear‐Targeted AIE Photosensitizer for Enzyme Inhibition and Photosensitization in Cancer Cell Ablation. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202114600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
Affiliation(s)
- Kang‐Nan Wang
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry State Key Laboratory of Oncology in South China Sun Yat-Sen University China
- Department of Chemical and Biomolecular Engineering National University of Singapore 4 Engineering Drive 4 Singapore 117585 Singapore
| | - Liu‐Yi Liu
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry State Key Laboratory of Oncology in South China Sun Yat-Sen University China
| | - Duo Mao
- Department of Chemical and Biomolecular Engineering National University of Singapore 4 Engineering Drive 4 Singapore 117585 Singapore
| | - Ming‐Xuan Hou
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry State Key Laboratory of Oncology in South China Sun Yat-Sen University China
| | - Cai‐Ping Tan
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry State Key Laboratory of Oncology in South China Sun Yat-Sen University China
| | - Zong‐Wan Mao
- MOE Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry State Key Laboratory of Oncology in South China Sun Yat-Sen University China
| | - Bin Liu
- Department of Chemical and Biomolecular Engineering National University of Singapore 4 Engineering Drive 4 Singapore 117585 Singapore
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4
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Fu B, Lin HC, Liu YC, Lin JR, Xiong WM, Deng SJ, Chen N, Liang R, Zhao P. VEGF aptamer/i-motif-grafted multi-functional SPION nanocarrier for chemotherapeutic/phototherapeutic synergistic research. J Biomater Appl 2021; 36:1277-1288. [PMID: 34689658 DOI: 10.1177/08853282211049620] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Chemotherapeutic agents and photosensitizers often suffer from poor tumor selectivity, high side toxicity, or low water solubility. To address these problems, various drug delivery systems (DDS) have been explored but most of them are toxic, difficult to synthesize, or of single function. In order to design a highly biocompatible, conveniently prepared, multi-functional drug delivery system, herein, an aptamer of vascular endothelial growth factor (VEGF) and a cytosine (C)-DNA fragment were grafted on the surface of superparamagnetic iron oxide nanoparticles (SPION), and then a chemotherapeutic agent daunomycin (DNM) and a photosensitizer 5, 10, 15, 20-tetra (phenyl-4-N-methyl-4-pyridyl) porphyrin (TMPyP) were self-assembled with the hybridized VEGF-based DNA structure. By loading DNM and TMPyP, the DDS displayed strong chemotherapeutic/phototherapeutic capability against cancer cells via mechanisms such as mitochondrial dysfunction and ROS elevation, which triggered the apoptosis of the tumor cells. The dual delivery of chemotherapeutical agents and photosensitizers with aptamer/C-rich DNA successfully integrated the functions of pH stimuli-responsive drug release and chemotherapeutic/phototherapeutic modalities into one single system and thus could be considered as an ideal drug delivery vehicle with great potential in clinic.
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Affiliation(s)
- Bo Fu
- College of Health Industry, Zhongshan Torch Polytechnic, Guangdong, China
| | - Hui-Chao Lin
- Cang Zhou People's Hospital, Cangzhou, China.,School of Chemistry and Chemical Engineering, 71237Guangdong Pharmaceutical University, Guangdong, PR China
| | - Ying-Chun Liu
- College of Health Industry, Zhongshan Torch Polytechnic, Guangdong, China
| | - Jie-Rou Lin
- Cang Zhou People's Hospital, Cangzhou, China
| | - Wen-Ming Xiong
- College of Health Industry, Zhongshan Torch Polytechnic, Guangdong, China
| | | | - Nian Chen
- College of Health Industry, Zhongshan Torch Polytechnic, Guangdong, China
| | - Rui Liang
- Cang Zhou People's Hospital, Cangzhou, China
| | - Ping Zhao
- School of Chemistry and Chemical Engineering, 71237Guangdong Pharmaceutical University, Guangdong, PR China
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5
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Zhao P, Tang ZW, Lin HC, Djuanda D, Zhu Z, Niu Q, Zhao LM, Qian YN, Cao G, Shen JL, Fu B. VEGF aptamer/i-motif-based drug co-delivery system for combined chemotherapy and photodynamic therapy. Photodiagnosis Photodyn Ther 2021; 36:102547. [PMID: 34562647 DOI: 10.1016/j.pdpdt.2021.102547] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2021] [Revised: 09/20/2021] [Accepted: 09/20/2021] [Indexed: 01/01/2023]
Abstract
BACKGROUND Nucleic acids used as drug delivery systems (DDS) have gained attention because of their biosafety and effortless synthesis. G-quadruplex (G4) structured aptamer such as AS1411 was frequently employed to deliver photosensitizers or chemotherapeutic agents while other aptamers were seldomly reported in this field. METHODS Herein, a chemical anticancer drug daunomycin (DNM), and a photosensitizer 5, 10, 15, 20-tetra (phenyl-4-N-methyl-4-pyridyl) porphyrin (TMPyP) were physically assembled with a novel DNA structure composed of an aptamer of vascular endothelial growth factor (VEGF) and a cytosine (C)-rich DNA fragment (gc-34). Spectral and molecular mimicking methods were employed to research the drug loading/releasing process. The in vitro cytotoxicity was studied by MTT, ROS, cell cycle, and cell apoptotic assays and the in vivo anticancer efficiency was evaluated by the inhibitive effect on the cancerous growth of MCF-7 tumor-bearing nude mice. RESULTS The G4-structured VEGF aptamer delivered TMPyP successfully for the first time. The designed DDS displayed sensitive VEGF/pH controlled drug release. The co-delivery of DNM and TMPyP exhibited high ROS production, significant cell cycle arresting and evident cell apoptosis, and displayed superior cytotoxicity against tumor cells compared with individual agents in vitro. In vivo studies showed that the dual-drug loaded system can greatly inhibit tumor growth with chemotherapeutic/photodynamic synergistic effects. CONCLUSION The co-delivery of DNM and TMPyP with aptamer/C-rich DNA successfully integrates the functions of VEGF/pH stimuli-responsive drug release and chemotherapeutic/phototherapeutic modalities into one single system, and may have great potential in cancer treatment.
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Affiliation(s)
- Ping Zhao
- School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Education Mega Centre, No. 280, Waihuandong Road, Guangzhou 510006, PR China.
| | - Zi-Wei Tang
- School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Education Mega Centre, No. 280, Waihuandong Road, Guangzhou 510006, PR China
| | - Hui-Chao Lin
- School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Education Mega Centre, No. 280, Waihuandong Road, Guangzhou 510006, PR China
| | - David Djuanda
- School of Ophthalmology & Optometry, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
| | - Zhaowei Zhu
- School of Ophthalmology & Optometry, School of Biomedical Engineering, Wenzhou Medical University, Wenzhou, Zhejiang 325035, China
| | - Qiang Niu
- School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Education Mega Centre, No. 280, Waihuandong Road, Guangzhou 510006, PR China; Department of plastic surgery, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510080, P. R. China
| | - Li-Min Zhao
- School of Chemistry and Chemical Engineering, Guangdong Pharmaceutical University, Education Mega Centre, No. 280, Waihuandong Road, Guangzhou 510006, PR China
| | - Yu-Na Qian
- Department of plastic surgery, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510080, P. R. China
| | - Gao Cao
- Department of plastic surgery, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510080, P. R. China
| | - Jian-Liang Shen
- Department of plastic surgery, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510080, P. R. China.
| | - Bo Fu
- College of Health Industry, Zhongshan Torch Polytechnic, No. 7 Xingye Road, Zhongshan 528436, Guangdong, China.
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6
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Bağda E, Bağda E, Kocak A, Durmuş M. Investigation of Binding behaviour of a water-soluble gallium (III) phthalocyanine with double-stranded and G-quadruplex DNA via experimental and computational methods. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2021.130536] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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7
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Gold(III) porphyrins: Synthesis and interaction with G-quadruplex DNA. J Inorg Biochem 2021; 223:111551. [PMID: 34340058 DOI: 10.1016/j.jinorgbio.2021.111551] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 07/09/2021] [Accepted: 07/15/2021] [Indexed: 12/25/2022]
Abstract
G-quadruplex nucleic acids (G4s) are RNA and DNA secondary structures involved in the regulation of multiple key biological processes. They can be found in telomeres, oncogene promoters, RNAs, but also in viral genomes. Due to their unique structural features, very distinct from the canonical duplexes or single-strands, G4s represent promising pharmacological targets for small molecules, namely G4-ligands. Gold(III) penta-cationic porphyrins, as specific G4 ligands, are able to inhibit HIV-1 infectivity and their antiviral activity correlates with their affinity for G4s. Up to now, one of the best antiviral compounds is meso-5,10,15,20-tetrakis[4-(N-methyl-pyridinium-2-yl)phenyl]porphyrinato gold(III) (1). Starting from this compound, we report a structure/affinity relationship study of gold(III) cationic porphyrins to find out the best porphyrin candidate for functionalization, in order to study the antiviral mechanism of action of these gold(III) porphyrins.
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8
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Suganthi S, Sivaraj R, Enoch IVMV. Molecular encapsulation of berberine by a modified β-cyclodextrin and binding of host: guest complex to G-quadruplex DNA. NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2019; 38:858-873. [PMID: 31148522 DOI: 10.1080/15257770.2019.1618469] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The capacity to control quadruplex formation, especially in cancer cells, is captivating and entails a reasonable comprehension of the ligand-G-quadruplex binding. Herein, we report an iminopyrenyl-β-cyclodextrin conjugate interacting with duplex and G-quadrulex DNAs. In addition, the host: guest association of the established G-quadruplex binder, berberine, with the β-cyclodextrin derivative is studied employing 2-D ROESY. NMR, UV-visible, and fluorescence spectroscopic techniques are utilized to explore the β-cyclodextrin conjugate's interaction with the quadruplexes. The Binding constants are accounted for the association of the ligands to each of the DNAs viz., calf thymus DNA (duplex), kit22, telo24, and myc22 (quadruplexes). The modulation of the iminopyrenyl-β-cyclodextrin binding to the DNAs are observed when berberine is loaded in the host molecule. A vivid distinction between the interactions of the ligands with duplex and quadruplex structures is inferred. Berberine-loaded iminopyrenyl-β-cyclodextrin shows a higher affinity for binding to kit22.
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Affiliation(s)
- Soundrapandian Suganthi
- Department of Chemistry, Karunya Institute of Technology and Sciences (Deemed-to-be University) , Coimbatore , Tamil Nadu , India
| | - Ramasamy Sivaraj
- Nanotoxicology Research Lab, Department of Nanoscience, Karunya Institute of Technology and Sciences (Deemed-to-be University) , Coimbatore , Tamil Nadu , India
| | - Israel V M V Enoch
- Department of Chemistry, Karunya Institute of Technology and Sciences (Deemed-to-be University) , Coimbatore , Tamil Nadu , India.,Nanotoxicology Research Lab, Department of Nanoscience, Karunya Institute of Technology and Sciences (Deemed-to-be University) , Coimbatore , Tamil Nadu , India
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9
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Huang S, Liang Y, Cui J, Xie J, Liu Y, Hu B, Xiao Q. Comparative investigation of binding interactions with three steroidal derivatives of d(GGGT) 4 G-quadruplex aptamer. Steroids 2018; 132:46-55. [PMID: 29458054 DOI: 10.1016/j.steroids.2018.02.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Revised: 02/04/2018] [Accepted: 02/13/2018] [Indexed: 11/19/2022]
Abstract
Steroidal derivatives have attracted tremendous attentions in biological and biomedical areas, due to their variety biological activities. The investigation of structural influences helps in understanding their biological activities. The interactions of steroidal derivatives with DNA may play important roles in biological activities, however only a few investigations were reported on this issue. Herein, the structural influences of three steroidal derivatives were investigated based on their binding interactions with d(GGGT)4 G-quadruplex aptamer by spectroscopic approaches, nuclear magnetic resonance (NMR), electrochemical methods, and molecular modeling techniques. Three compounds were found to selectively bind with parallel G-quadruplex aptamer to form three complexes through end-stacking binding modes. Three compounds stabilized the G-quadruplex structure of the aptamer at different levels, which enhanced the biological activity of this aptamer to some extent. The space steric hindrance was responsible for differences in the binding interactions between d(GGGT)4 G-quadruplex aptamer and three compounds. These results provide new information for the molecular understanding of binding interactions of steroidal derivatives with DNA and the strategy for research of structural influences.
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Affiliation(s)
- Shan Huang
- College of Chemistry and Materials Science, Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Guangxi Teachers Education University, Nanning 530001, PR China; Key Laboratory of Beibu Gulf Environment Change and Resources Utilization (Guangxi Teachers Education University), Ministry of Education, Nanning 530001, PR China
| | - Yu Liang
- College of Chemistry and Materials Science, Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Guangxi Teachers Education University, Nanning 530001, PR China
| | - Jianguo Cui
- College of Chemistry and Materials Science, Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Guangxi Teachers Education University, Nanning 530001, PR China.
| | - Jiangning Xie
- College of Chemistry and Materials Science, Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Guangxi Teachers Education University, Nanning 530001, PR China
| | - Yi Liu
- College of Chemistry and Materials Science, Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Guangxi Teachers Education University, Nanning 530001, PR China; College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, PR China
| | - Baoqing Hu
- Key Laboratory of Beibu Gulf Environment Change and Resources Utilization (Guangxi Teachers Education University), Ministry of Education, Nanning 530001, PR China
| | - Qi Xiao
- College of Chemistry and Materials Science, Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, Guangxi Teachers Education University, Nanning 530001, PR China; College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, PR China; Key Laboratory of Beibu Gulf Environment Change and Resources Utilization (Guangxi Teachers Education University), Ministry of Education, Nanning 530001, PR China.
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10
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Zhou C, Zou H, Sun C, Ren D, Xiong W, Li Y. Fluorescent aptasensor for detection of four tetracycline veterinary drugs in milk based on catalytic hairpin assembly reaction and displacement of G-quadruplex. Anal Bioanal Chem 2018. [PMID: 29516136 DOI: 10.1007/s00216-018-0981-2] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Based on a novel signal amplification strategy by catalytic hairpin assembly and displacement of G-quadruplex DNA, an enzyme-free, non-label fluorescent aptasensing approach was established for sensitive detection of four tetracycline veterinary drugs in milk. The network consisted of a pair of partially complementary DNA hairpins (HP1 and HP2). The DNA aptamer of four tetracycline veterinary drugs was located at the sticky end of the HP1. The ring region of HP1 rich in G and C could form a stable G-quadruplex structure, which could emit specific fluorescence signal after binding with the fluorescent dye and N-methylmesoporphyrin IX (NMM). When presented in the system, the target analytes would be repeatedly used to trigger a recycling procedure between the hairpins, generating numerous HP1-HP2 duplex complexes and displacing G-quadruplex DNA. Thus, the sensitive detection of target analytes was achieved in a wide linear range (0-1000 μg/L) with the detection limit of 4.6 μg/L. Moreover, this proposed method showed high discrimination efficiency towards target analytes against other common mismatched veterinary drugs, and could be successfully applied to the analysis of milk samples. Graphical abstract Schematic of target analyte detection based on catalytic hairpin assembly reaction and displacement of G-quadruplex.
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Affiliation(s)
- Chen Zhou
- West China School of Public Health, Sichuan University, no. 17, South Renmin Road, Wuhou District, Chengdu, Sichuan, 610041, China
| | - Haimin Zou
- West China School of Public Health, Sichuan University, no. 17, South Renmin Road, Wuhou District, Chengdu, Sichuan, 610041, China.,Chengdu Center for Disease Control and Prevention, Chengdu, Sichuan, 610031, China
| | - Chengjun Sun
- West China School of Public Health, Sichuan University, no. 17, South Renmin Road, Wuhou District, Chengdu, Sichuan, 610041, China
| | - Dongxia Ren
- West China School of Public Health, Sichuan University, no. 17, South Renmin Road, Wuhou District, Chengdu, Sichuan, 610041, China
| | - Wei Xiong
- West China School of Public Health, Sichuan University, no. 17, South Renmin Road, Wuhou District, Chengdu, Sichuan, 610041, China
| | - Yongxin Li
- West China School of Public Health, Sichuan University, no. 17, South Renmin Road, Wuhou District, Chengdu, Sichuan, 610041, China. .,College of Life Sciences, Sichuan University, no. 29, Wangjiang Road, Chengdu, Sichuan, 610064, China.
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