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Poudyal DC, Dhamu VN, Samson M, Malik S, Kadambathil CS, Muthukumar S, Prasad S. How safe is our food we eat? An electrochemical lab-on-kitchen approach towards combinatorial testing for pesticides and GMOs; A case study with edamame. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 252:114635. [PMID: 36787687 DOI: 10.1016/j.ecoenv.2023.114635] [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: 11/19/2022] [Revised: 02/06/2023] [Accepted: 02/08/2023] [Indexed: 06/18/2023]
Abstract
In our daily life, as consumers we are constantly made aware of the impact of pesticides and other modifications to food products derived from genetically modified organisms (GMO's) that have an impact on human health. In our connected world, there is an immense interest for on-demand information about food quality prior to consumption. The gold standard method to detect pesticides or GMOs residues in food is complex and is not amenable to rapid consumer use. In this study, we demonstrate the feasibility of an electrochemical portable sensing approach for the simultaneous direct detection of spiked pesticides chlorpyrifos (Chlp) and GMOs protein Cry1Ab in real edamame soy matrix. The immunoassay based two-plex sensing platform was fabricated using respective antibody's Chlp on one side and Cry1Ab on other side. A simple lab-on-kitchen level preparation of matrix has been demonstrated and sensor response was tested using non-faradaic electrochemical impedance spectroscopy (EIS), which showed a linear response in Cry1Ab/Chlp concentrations from 0.3 ng/mL to 243 ng/mL with limit of detection 0.3 ng /mL for both the target antigens (Cry1Ab and Chlp) respectively. The spiked and recovery test results fall within ± 20% error in real sample matrix which demonstrates the performance of the our platform with maximum residue limit (MRL) for the given targets. Such electrochemical portable multi-analyte direct sensing tool with simple matrix processing protocol can be a future commercial field-testing tool for use at everyday consumer level.
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Affiliation(s)
- Durgasha C Poudyal
- Department of Bioengineering, University of Texas at Dallas, Richardson, TX 75080, United States
| | - Vikram Narayanan Dhamu
- Department of Bioengineering, University of Texas at Dallas, Richardson, TX 75080, United States
| | - Manish Samson
- Department of Bioengineering, University of Texas at Dallas, Richardson, TX 75080, United States
| | - Shahryar Malik
- Department of Bioengineering, University of Texas at Dallas, Richardson, TX 75080, United States
| | | | | | - Shalini Prasad
- Department of Bioengineering, University of Texas at Dallas, Richardson, TX 75080, United States.
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2
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Pesticide analytical screening system (PASS): A novel electrochemical system for multiplex screening of glyphosate and chlorpyrifos in high-fat and low-fat food matrices. Food Chem 2023; 400:134075. [DOI: 10.1016/j.foodchem.2022.134075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 08/04/2022] [Accepted: 08/28/2022] [Indexed: 11/22/2022]
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3
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Metal nanoparticles: biomedical applications and their molecular mechanisms of toxicity. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-022-02351-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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4
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Li C, Chen P, Khan IM, Wang Z, Zhang Y, Ma X. Fluorescence-Raman dual-mode quantitative detection and imaging of small-molecule thiols in cell apoptosis with DNA-modified gold nanoflowers. J Mater Chem B 2022; 10:571-581. [PMID: 34994374 DOI: 10.1039/d1tb02437j] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The monitoring of small-molecule thiols (especially glutathione) has attracted widespread attention due to their involvement in numerous physiological processes in living organisms and cells. In this work, a dual-mode nanosensor was designed to detect small-molecule thiols, which is based on the "on-off" switch of fluorescence resonance energy transfer (FRET) and surface-enhanced Raman scattering (SERS). Briefly, DNA was modified by Cy5 (signal probe) and disulfide bonds (recognition element). Gold nanoflowers (AuNFs) were used as the fluorescence-quenching and SERS-enhancing substrate. However, small-molecule thiols can cleave disulfide bonds and release short Cy5-labeled chains, causing the recovery of the fluorescence signal and a decrease of the SERS signal. The nanosensor showed a sensitive response to small-molecule thiols represented by GSH, with a linear range of 0.01-3 mM and a detection limit of 913 nM. In addition, it competed with other related biological interferences and presented good stability and better selectivity towards small-molecule thiols. Most importantly, the developed nanosensor had been successfully applied to in situ imaging and quantitative monitoring of the concentration of small-molecule thiols which changed during T-2 toxin-induced apoptosis in HeLa cells. Meanwhile, nanosensors are also versatile with their potential applications and can be easily extended to the detection and imaging of other human cell lines. The proposed method combines the dual advantages of fluorescence and SERS, which has broad prospects for in situ studies of physiological processes involving small-molecule thiols in biological systems.
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Affiliation(s)
- Chenbiao Li
- State Key Laboratory of Food Science and Technology, 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.,Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi 214122, China
| | - Peifang Chen
- State Key Laboratory of Food Science and Technology, 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.,Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi 214122, China
| | - Imran Mahmood Khan
- State Key Laboratory of Food Science and Technology, 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.,Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi 214122, China
| | - Zhouping Wang
- State Key Laboratory of Food Science and Technology, 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.,Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi 214122, China.,Key Laboratory of Meat Processing of Sichuan, Chengdu University, Chengdu 610106, China
| | - Yin Zhang
- Key Laboratory of Meat Processing of Sichuan, Chengdu University, Chengdu 610106, China
| | - Xiaoyuan Ma
- State Key Laboratory of Food Science and Technology, 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.,Collaborative Innovation Center of Food Safety and Quality Control in Jiangsu Province, Jiangnan University, Wuxi 214122, China
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5
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Balkrishna A, Kumar A, Arya V, Rohela A, Verma R, Nepovimova E, Krejcar O, Kumar D, Thakur N, Kuca K. Phytoantioxidant Functionalized Nanoparticles: A Green Approach to Combat Nanoparticle-Induced Oxidative Stress. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:3155962. [PMID: 34737844 PMCID: PMC8563134 DOI: 10.1155/2021/3155962] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 09/19/2021] [Accepted: 10/04/2021] [Indexed: 12/14/2022]
Abstract
Nanotechnology is gaining significant attention, with numerous biomedical applications. Silver in wound dressings, copper oxide and silver in antibacterial preparations, and zinc oxide nanoparticles as a food and cosmetic ingredient are common examples. However, adverse effects of nanoparticles in humans and the environment from extended exposure at varied concentrations have yet to be established. One of the drawbacks of employing nanoparticles is their tendency to cause oxidative stress, a significant public health concern with life-threatening consequences. Cardiovascular, renal, and respiratory problems and diabetes are among the oxidative stress-related disorders. In this context, phytoantioxidant functionalized nanoparticles could be a novel and effective alternative. In addition to performing their intended function, they can protect against oxidative damage. This review was designed by searching through various websites, books, and articles found in PubMed, Science Direct, and Google Scholar. To begin with, oxidative stress, its related diseases, and the mechanistic basis of oxidative damage caused by nanoparticles are discussed. One of the main mechanisms of action of nanoparticles was unearthed to be oxidative stress, which limits their use in humans. Secondly, the role of phytoantioxidant functionalized nanoparticles in oxidative damage prevention is critically discussed. The parameters for the characterization of nanoparticles were also discussed. The majority of silver, gold, iron, zinc oxide, and copper nanoparticles produced utilizing various plant extracts were active free radical scavengers. This potential is linked to several surface fabricated phytoconstituents, such as flavonoids and phenols. These phytoantioxidant functionalized nanoparticles could be a better alternative to nanoparticles prepared by other existing approaches.
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Affiliation(s)
- Acharya Balkrishna
- Patanjali Herbal Research Department, Patanjali Research Institute, Haridwar 249405, India
- Department of Allied Sciences, University of Patanjali, Haridwar 249405, India
| | - Ashwani Kumar
- Patanjali Herbal Research Department, Patanjali Research Institute, Haridwar 249405, India
| | - Vedpriya Arya
- Patanjali Herbal Research Department, Patanjali Research Institute, Haridwar 249405, India
- Department of Allied Sciences, University of Patanjali, Haridwar 249405, India
| | - Akansha Rohela
- Patanjali Herbal Research Department, Patanjali Research Institute, Haridwar 249405, India
| | - Rachna Verma
- School of Biological and Environmental Sciences, Shoolini University of Biotechnology and Management Sciences, Solan 173229, India
| | - Eugenie Nepovimova
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove 50003, Czech Republic
| | - Ondrej Krejcar
- Center for Basic and Applied Science, Faculty of Informatics and Management, University of Hradec Kralove, 50003 Hradec Kralove, Czech Republic
- Malaysia Japan International Institute of Technology (MJIIT), Universiti Teknologi Malaysia, Jalan Sultan Yahya Petra, Kuala Lumpur 54100, Malaysia
| | - Dinesh Kumar
- School of Bioengineering and Food Technology, Shoolini University of Biotechnology and Management Sciences, Solan 173229, India
| | - Naveen Thakur
- Department of Physics, Career Point University, Hamirpur 177001, India
| | - Kamil Kuca
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, Hradec Kralove 50003, Czech Republic
- Biomedical Research Center, University Hospital in Hradec Kralove, Sokolska 581, Hradec Kralove 50005, Czech Republic
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Balkrishna A, Arya V, Rohela A, Kumar A, Verma R, Kumar D, Nepovimova E, Kuca K, Thakur N, Thakur N, Kumar P. Nanotechnology Interventions in the Management of COVID-19: Prevention, Diagnosis and Virus-Like Particle Vaccines. Vaccines (Basel) 2021; 9:1129. [PMID: 34696237 PMCID: PMC8537718 DOI: 10.3390/vaccines9101129] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 09/25/2021] [Accepted: 09/30/2021] [Indexed: 02/07/2023] Open
Abstract
SARS-CoV-2 claimed numerous lives and put nations on high alert. The lack of antiviral medications and the small number of approved vaccines, as well as the recurrence of adverse effects, necessitates the development of novel treatment ways to combat COVID-19. In this context, using databases such as PubMed, Google Scholar, and Science Direct, we gathered information about nanotechnology's involvement in the prevention, diagnosis and virus-like particle vaccine development. This review revealed that various nanomaterials like gold, polymeric, graphene and poly amino ester with carboxyl group coated magnetic nanoparticles have been explored for the fast detection of SARS-CoV-2. Personal protective equipment fabricated with nanoparticles, such as gloves, masks, clothes, surfactants, and Ag, TiO2 based disinfectants played an essential role in halting COVID-19 transmission. Nanoparticles are used not only in vaccine delivery, such as lipid nanoparticles mediated transport of mRNA-based Pfizer and Moderna vaccines, but also in the development of vaccine as the virus-like particles elicit an immune response. There are now 18 virus-like particle vaccines in pre-clinical development, with one of them, developed by Novavax, reported being in phase 3 trials. Due to the probability of upcoming COVID-19 waves, and the rise of new diseases, the future relevance of virus-like particles is imperative. Furthermore, psychosocial variables linked to vaccine reluctance constitute a critical problem that must be addressed immediately to avert pandemic.
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Affiliation(s)
- Acharya Balkrishna
- Patanjali Herbal Research Department, Patanjali Research Institute, Haridwar 249405, India; (A.B.); (V.A.); (A.R.)
- Department of Allied Sciences, University of Patanjali, Haridwar 249405, India
| | - Vedpriya Arya
- Patanjali Herbal Research Department, Patanjali Research Institute, Haridwar 249405, India; (A.B.); (V.A.); (A.R.)
- Department of Allied Sciences, University of Patanjali, Haridwar 249405, India
| | - Akansha Rohela
- Patanjali Herbal Research Department, Patanjali Research Institute, Haridwar 249405, India; (A.B.); (V.A.); (A.R.)
| | - Ashwani Kumar
- Patanjali Herbal Research Department, Patanjali Research Institute, Haridwar 249405, India; (A.B.); (V.A.); (A.R.)
| | - Rachna Verma
- School of Biological and Environmental Sciences, Shoolini University of Biotechnology and Management Sciences, Solan 173229, India
| | - Dinesh Kumar
- School of Bioengineering and Food Technology, Shoolini University of Biotechnology and Management Sciences, Solan 173229, India;
| | - Eugenie Nepovimova
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, 50003 Hradec Kralove, Czech Republic;
| | - Kamil Kuca
- Department of Chemistry, Faculty of Science, University of Hradec Kralove, 50003 Hradec Kralove, Czech Republic;
- Biomedical Research Center, University Hospital in Hradec Kralove, Sokolska 581, 50005 Hradec Kralove, Czech Republic
| | - Naveen Thakur
- Department of Physics, Career Point University, Hamirpur 177001, India; (N.T.); (N.T.); (P.K.)
| | - Nikesh Thakur
- Department of Physics, Career Point University, Hamirpur 177001, India; (N.T.); (N.T.); (P.K.)
| | - Pankaj Kumar
- Department of Physics, Career Point University, Hamirpur 177001, India; (N.T.); (N.T.); (P.K.)
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7
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Zhang X, Huang Z, Guo Z, Han Y, Zhang L, Yang W. Fabrication of Bovine Serum Albumin@Au Particles for Colorimetric Detection of Glutathione. ACS APPLIED BIO MATERIALS 2020; 3:9109-9116. [PMID: 35019588 DOI: 10.1021/acsabm.0c01321] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Abnormal concentrations of glutathione (GSH) are important indicators of many human diseases such as cancers, liver damage, AIDS, and Alzheimer's disease. In this work, a kind of bovine serum albumin (BSA)@Au core-shell particles were fabricated using 110 nm BSA aggregates as a template, onto which gold shells composed of Au nanoparticles (NPs) were grown through a seeded growth approach. The morphology of the Au shells deposited on BSA aggregates was tuned from sparse to dense distribution of Au NPs by increasing the concentration of silver ions contained in the growth solutions. Surface plasmon resonance (SPR) peaks of BSA@Au particles were tunable in the range from 550 to 620 nm, corresponding to evolution in color from red to blue due to the enhanced plasmonic coupling among the Au NPs in the shell. The blue BSA@Au particles were qualified for colorimetric detection of GSH since GSH may act as a swelling agent for BSA@Au particles by breaking the intermolecular disulfide bonds in BSA aggregates. With an increased amount of GSH presented, the color of BSA@Au particles evolved from blue to red attributed to gradual swelling of BSA@Au particles and thus increased the distance among the Au NPs in the shell, which was readily recognized by naked eyes or recorded by ultraviolet-visible (UV-vis) spectroscopy. This colorimetric method exhibited good selectivity and anti-interference capability in the analysis of GSH in real samples. In addition, a solid sensing system for the detection of GSH was designed and fabricated by dispersing BSA@Au particles into an agarose hydrogel.
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Affiliation(s)
- Xiaoyu Zhang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China
| | - Zhenzhen Huang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China
| | - Zilong Guo
- Institute of Molecular Plus, Tianjin University, Tianjin 300072, China
| | - Yandong Han
- Institute of Molecular Plus, Tianjin University, Tianjin 300072, China
| | - Lijuan Zhang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China
| | - Wensheng Yang
- State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China
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8
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Liu YZ, Zhang JB, Yuan K. Theoretical Prediction on a Novel Reduction-Responsive Nanoring Having a Disulfide Group for Facile Encapsulation and Release of Fullerenes C 60 and C 70. ACS OMEGA 2020; 5:25400-25407. [PMID: 33043220 PMCID: PMC7542849 DOI: 10.1021/acsomega.0c03788] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 09/15/2020] [Indexed: 06/11/2023]
Abstract
In this work, a novel reduction-responsive disulfide bond-containing cycloparaphenylene nanoring molecule (DSCPP) with a pyriform shape has been designed. In addition, the interactions between the designed nanoring (host) and fullerenes C60 and C70 (guests) were investigated theoretically at the M06-2X/6-31G(d,p) and M06-L/MIDI! levels of theory. By analyzing geometric characteristics and host-guest binding energies, it is revealed that the designed DSCPP is an ideal host molecule of guests C60 and C70. DSCPP presents excellent elastic deformation during the encapsulation of C60 and C70. The high binding energies suggest that both DSCPP⊃C60 and DSCPP⊃C70 (∼92 and 118 kJ·mol-1 at the M06-2X/6-31G(d,p) level of theory) are stable host-guest complexes, and the guest C70 is more strongly encapsulated than C60 in the gas phase. The thermodynamic information indicates that the formation of the two host-guest complexes is thermodynamically spontaneous. In addition, the frontier molecular orbital (FMO) features and intermolecular weak interaction region between DSCPP and fullerenes gusts are discussed to further understand the structures and properties of the DSCPP⊃fullerene systems. Finally, the ring-opening mechanism of the DSCPP under reduction conditions is investigated.
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Affiliation(s)
- Yan-Zhi Liu
- School
of Chemical Engineering and Technology, Tianshui Normal University, Tianshui 741001, China
- Key
Laboratory for New Molecule Materials Design and Function of Gansu
Universities, Tianshui Normal University, Tianshui 741001, China
| | - Jian-Bin Zhang
- School
of Chemical Engineering and Technology, Tianshui Normal University, Tianshui 741001, China
| | - Kun Yuan
- School
of Chemical Engineering and Technology, Tianshui Normal University, Tianshui 741001, China
- Key
Laboratory for New Molecule Materials Design and Function of Gansu
Universities, Tianshui Normal University, Tianshui 741001, China
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9
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Li N, Guo W, Li Y, Zuo H, Zhang H, Wang Z, Zhao Y, Yang F, Ren G, Zhang S. Construction and anti-tumor activities of disulfide-linked docetaxel-dihydroartemisinin nanoconjugates. Colloids Surf B Biointerfaces 2020; 191:111018. [PMID: 32304917 DOI: 10.1016/j.colsurfb.2020.111018] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 04/02/2020] [Accepted: 04/04/2020] [Indexed: 12/19/2022]
Abstract
Co-delivery of anti-tumor agents with outstanding stimulus-triggered drug release in tumor cells, especially with the aid of nanotechnology, provided the possibility to enhance delivery efficiency for targeting tumor cells and antitumor efficacy. In this paper, docetaxel-dihydroartemisinin nanoconjugates linked by disulfide bond were designed to increase co-delivery and anti-tumor efficacy. Docetaxel and dihydroartemisinin were synthesized using two-step reaction and furtherly assembled to nanoconjugates. Nanoprescription was optimized to evaluate its physicochemical properties. In vitro anti-tumor activities of nanoformulation were assessed by MTT. The flow cytometry was adopted to analyze cell apoptosis and cell cycle arrest. The wound healing assay was used to evaluate antimigratory-property. In vivo pharmacokinetic and pharmacodynamic studies were investigated in rats and 4T1 bearing Balb/c mice model after intravenous injection, respectively. The chemical structure of conjugate was confirmed. The prepared nanoparticles possessed uniform size distribution (172.10 ± 1.70 nm, PDI 0.05 ± 0.01), was stable during storage period, sustained release profiles and sensitive reduction responsiveness. MTT assay indicated that the toxicity of nanoconjugates was slightly weak. Flow cytometry studies showed that nanoconjugates could promote early apoptosis significantly and mainly arose from G0/G1 phase. The wound healing assay provided an obvious antimetastatic potential of nanoparticles in 4T1 cells. The result of pharmacokinetic study suggested that nanoconjugates exhibited higher exposure levels. In vivo pharmacodynamic research showed that mice treated with docetaxel-dihydroartemisinin nanoconjugates had lower systemic toxicity and higher survival ratio than those of control groups. This potential of nanoconjugates was developed as a novel nanoplateform to treat tumor.
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Affiliation(s)
- Ning Li
- School of Pharmacy, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Wenju Guo
- School of Pharmacy, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Yujie Li
- School of Pharmacy, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Hengtong Zuo
- School of Pharmacy, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Huihui Zhang
- School of Pharmacy, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Zhaoyun Wang
- School of Pharmacy, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Yongdan Zhao
- School of Pharmacy, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Fan Yang
- School of Pharmacy, Shanxi Medical University, Taiyuan, Shanxi, China
| | - Guolian Ren
- School of Pharmacy, Shanxi Medical University, Taiyuan, Shanxi, China.
| | - Shuqiu Zhang
- School of Pharmacy, Shanxi Medical University, Taiyuan, Shanxi, China.
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Lu X, Liu C, Wang Z, Yang J, Xu M, Dong J, Wang P, Gu J, Cao F. Nitrogen-Doped Carbon Nanoparticles Derived from Silkworm Excrement as On⁻Off⁻On Fluorescent Sensors to Detect Fe(III) and Biothiols. NANOMATERIALS (BASEL, SWITZERLAND) 2018; 8:E443. [PMID: 29914212 PMCID: PMC6027355 DOI: 10.3390/nano8060443] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/28/2018] [Revised: 06/14/2018] [Accepted: 06/14/2018] [Indexed: 01/19/2023]
Abstract
On⁻off⁻on fluorescent sensors based on emerging carbon nanoparticles (CNPs) or carbon dots (CDs) have attracted extensive attention for their convenience and efficiency. In this study, dumped silkworm excrement was used as a novel precursor to prepare fluorescent nitrogen-doped CNPs (N-CNPs) through hydrothermal treatment. The obtained N-CNPs showed good photoluminescent properties and excellent water dispersibility. Thus, they were applied as fluorescence “on⁻off⁻on” probes for the detection of Fe(III) and biothiols. The “on⁻off” process was achieved by adding Fe(III) into N-CNP solution, which resulted in the selective fluorescence quenching, with the detection limit of 0.20 μM in the linear range of 1⁻500 μM. Following this, the introduction of biothiols could recover the fluorescence efficiently, in order to realize the “off⁻on” process. By using glutathione (GSH) as the representative, the linear range was in the range of 1⁻1000 μM, and the limit of detection was 0.13 μM. Moreover, this useful strategy was successfully applied for the determination of amounts of GSH in fetal calf serum samples.
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Affiliation(s)
- Xingchang Lu
- College of Science, Huazhong Agricultural University, Wuhan 430070, China.
| | - Chen Liu
- College of Science, Huazhong Agricultural University, Wuhan 430070, China.
| | - Zhimin Wang
- College of Science, Huazhong Agricultural University, Wuhan 430070, China.
| | - Junyi Yang
- College of Science, Huazhong Agricultural University, Wuhan 430070, China.
| | - Mengjing Xu
- College of Science, Huazhong Agricultural University, Wuhan 430070, China.
| | - Jun Dong
- College of Science, Huazhong Agricultural University, Wuhan 430070, China.
| | - Ping Wang
- College of Science, Huazhong Agricultural University, Wuhan 430070, China.
| | - Jiangjiang Gu
- College of Science, Huazhong Agricultural University, Wuhan 430070, China.
| | - Feifei Cao
- College of Science, Huazhong Agricultural University, Wuhan 430070, China.
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Sokolowska K, Hulkko E, Lehtovaara L, Lahtinen T. Dithiol-Induced Oligomerization of Thiol-Protected Gold Nanoclusters. THE JOURNAL OF PHYSICAL CHEMISTRY. C, NANOMATERIALS AND INTERFACES 2018; 122:12524-12533. [PMID: 30258521 PMCID: PMC6150662 DOI: 10.1021/acs.jpcc.8b02988] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Revised: 05/16/2018] [Indexed: 06/08/2023]
Abstract
Controlled synthesis of nanostructure oligomers requires detailed understanding of their wet chemistry and the forces driving the polymerization process. In this paper, we report the main factors affecting the reaction yields of a dithiol-induced synthesis of covalently bound nanocluster dimers and oligomers and present a detailed analysis of possible reaction mechanisms. We synthesize the nanocluster oligomers using monodisperse para-mercaptobenzoic acid (p-MBA)-protected gold nanoclusters with a nominal composition of Au∼250(p-MBA) n to minimize ensemble effects on size, shape, and surface structure. Ligand exchange was performed on the nanoclusters with five different dithiol linkers: 5,5'-bis(mercaptomethyl)-2,2'-bipyridine, 4,4″-thiobisbenzenethiol, benzene-1,4-dithiol, 1,4-benzenedimethanethiol, and dimercaptostilbene. Oligomer yields depend strongly on the used dithiol and on the dithiol-to-nanocluster ratio. Detailed analysis of the reaction yields in combination with simulations suggests that the system reaches a dynamic equilibrium, where ligand exchange happens continuously forming and breaking nanocluster oligomers that are bound together by short chains of disulfide-bridged dithiols. Despite the dynamic nature of the system, dithiol-induced polymerization of nanoclusters is a general and straightforward approach to produce dimers and larger oligomers of thiol-protected nanoclusters. Our work provides physical insight into, offers tools for, and reveals challenges in the controlled synthesis of covalently bound nanoparticle assemblies.
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Biswas S, Pal K, Kumar P, Koner AL. A fluorogenic probe for in vitro and in vivo detection of biothiols and vitamin-C with an in-depth mechanistic understanding. SENSORS AND ACTUATORS B: CHEMICAL 2018; 256:186-194. [DOI: 10.1016/j.snb.2017.10.061] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/19/2023]
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13
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TiO2 and its composites as promising biomaterials: a review. Biometals 2018; 31:147-159. [DOI: 10.1007/s10534-018-0078-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2018] [Accepted: 01/26/2018] [Indexed: 01/04/2023]
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14
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Kappi FA, Papadopoulos GA, Tsogas GZ, Giokas DL. Low-cost colorimetric assay of biothiols based on the photochemical reduction of silver halides and consumer electronic imaging devices. Talanta 2017; 172:15-22. [PMID: 28602288 DOI: 10.1016/j.talanta.2017.05.014] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 05/04/2017] [Accepted: 05/08/2017] [Indexed: 12/22/2022]
Abstract
This work describes a new approach for the determination of free biothiols in biological fluids that exploits some of the basic principles of early photographic chemistry - that was based on silver-halide recording materials - and uses broadly-available imaging devices (i.e. flatbed scanners) as detectors. Specifically, the proposed approach relies on the ability of biothiols to bind to silver ions and dissociate the silver halide crystals thus changing the photosensitivity of silver halide crystal suspension. The changes induced by biothiols on the light intensity transmitted through the silver halide suspension, after photochemical reduction, were measured with a simplified photometric approach that employs a flatbed scanner operating in transmittance mode. The overall analytical procedure for the determination of biothiols was easily executable, fast and could be applied with inexpensive and commercially available materials and reagents. What is more, physiologically relevant biothiol levels could be inspected even by the unattended eye. The developed assay was successfully applied to the determination of biothiols in urine and blood plasma samples with detection limits as low as 10μM, satisfactory recoveries (92-97%), good reproducibility (6.7-8.8%) and high selectivity against other major components of biological fluids. The utility of the method to the determination of reduced/oxidized thiol ratio's as well as its application under natural light illumination, without external energy sources, was also demonstrated and is discussed with regard to point-of need applications in facility-limited settings.
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Affiliation(s)
- Foteini A Kappi
- Department of Chemistry, University of Ioannina, 45110 Ioannina, Greece
| | | | - George Z Tsogas
- Department of Chemistry, University of Ioannina, 45110 Ioannina, Greece
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15
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Umapathi R, Vepuri SB, Venkatesu P, Soliman ME. Comprehensive Computational and Experimental Analysis of Biomaterial toward the Behavior of Imidazolium-Based Ionic Liquids: An Interplay between Hydrophilic and Hydrophobic Interactions. J Phys Chem B 2017; 121:4909-4922. [DOI: 10.1021/acs.jpcb.7b02208] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
| | - Suresh B. Vepuri
- K
L College of Pharmacy, K L University, Guntur 522 502, India
- Discipline
of Pharmaceutical Sciences, School of Health Sciences, University of KwaZulu-Natal (UKZN), Westville Campus, Durban 4000, South Africa
| | | | - Mahmoud E. Soliman
- Discipline
of Pharmaceutical Sciences, School of Health Sciences, University of KwaZulu-Natal (UKZN), Westville Campus, Durban 4000, South Africa
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16
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Non-protein thiol imaging and quantification in live cells with a novel benzofurazan sulfide triphenylphosphonium fluorogenic compound. Anal Bioanal Chem 2017; 409:3417-3427. [PMID: 28357485 DOI: 10.1007/s00216-017-0285-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2016] [Revised: 02/04/2017] [Accepted: 02/27/2017] [Indexed: 12/20/2022]
Abstract
Thiols (-SH) play various roles in biological systems. They are divided into protein thiols (PSH) and non-protein thiols (NPSH). Due to the significant roles thiols play in various physiological/pathological functions, numerous analytical methods have been developed for thiol assays. Most of these methods are developed for glutathione, the major form of NPSH. Majority of these methods require tissue/cell homogenization before analysis. Due to a lack of effective thiol-specific fluorescent/fluorogenic reagents, methods for imaging and quantifying thiols in live cells are limited. Determination of an analyte in live cells can reveal information that cannot be revealed by analysis of cell homogenates. Previously, we reported a thiol-specific thiol-sulfide exchange reaction. Based on this reaction, a benzofurazan sulfide thiol-specific fluorogenic reagent was developed. The reagent was able to effectively image and quantify total thiols (PSH+NPSH) in live cells through fluorescence microscopy. The reagent was later named as GUALY's reagent. Here we would like to report an extension of the work by synthesizing a novel benzofurazan sulfide triphenylphosphonium derivative [(((7,7'-thiobis(benzo[c][1,2,5]oxadiazole-4,4'-sulfonyl))bis(methylazanediyl))bis(butane-4,1-diyl))bis(triphenylphosphonium) (TBOP)]. Like GUALY's reagent, TBOP is a thiol-specific fluorogenic agent that is non-fluorescent but forms fluorescent thiol adducts in a thiol-specific fashion. Different than GUALY's reagent, TBOP reacts only with NPSH but not with PSH. TBOP was effectively used to image and quantify NPSH in live cells using fluorescence microscopy. TBOP is a complementary reagent to GUALY's reagent in determining the roles of PSH, NPSH, and total thiols in thiol-related physiological/pathological functions in live cells through fluorescence microscopy. Graphical Abstract Live cell imaging and quantification of non-protein thiols by TBOP.
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17
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Shen B, Tapio K, Linko V, Kostiainen MA, Toppari JJ. Metallic Nanostructures Based on DNA Nanoshapes. NANOMATERIALS 2016; 6:nano6080146. [PMID: 28335274 PMCID: PMC5224615 DOI: 10.3390/nano6080146] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Revised: 07/26/2016] [Accepted: 08/01/2016] [Indexed: 01/10/2023]
Abstract
Metallic nanostructures have inspired extensive research over several decades, particularly within the field of nanoelectronics and increasingly in plasmonics. Due to the limitations of conventional lithography methods, the development of bottom-up fabricated metallic nanostructures has become more and more in demand. The remarkable development of DNA-based nanostructures has provided many successful methods and realizations for these needs, such as chemical DNA metallization via seeding or ionization, as well as DNA-guided lithography and casting of metallic nanoparticles by DNA molds. These methods offer high resolution, versatility and throughput and could enable the fabrication of arbitrarily-shaped structures with a 10-nm feature size, thus bringing novel applications into view. In this review, we cover the evolution of DNA-based metallic nanostructures, starting from the metallized double-stranded DNA for electronics and progress to sophisticated plasmonic structures based on DNA origami objects.
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Affiliation(s)
- Boxuan Shen
- Nanoscience Center, Department of Physics, University of Jyväskylä, P.O. Box 35, Jyväskylä 40014, Finland.
| | - Kosti Tapio
- Nanoscience Center, Department of Physics, University of Jyväskylä, P.O. Box 35, Jyväskylä 40014, Finland.
| | - Veikko Linko
- Biohybrid Materials, Department of Biotechnology and Chemical Technology, Aalto University, P.O. Box 16100, Aalto 00076, Finland.
| | - Mauri A Kostiainen
- Biohybrid Materials, Department of Biotechnology and Chemical Technology, Aalto University, P.O. Box 16100, Aalto 00076, Finland.
| | - Jari Jussi Toppari
- Nanoscience Center, Department of Physics, University of Jyväskylä, P.O. Box 35, Jyväskylä 40014, Finland.
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18
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Santos ACF, Moura FA, Tanaka AA, Luz RCS, Damos FS, Kubota LT, Goulart MOF. Sensitive Electroanalytical Detection on GCE: the Case of Lipoic Acid and its Interaction with N
-acetylcysteine and Glutathione. ELECTROANAL 2016. [DOI: 10.1002/elan.201600205] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
| | - Fabiana A. Moura
- Universidade Federal de Alagoas; Av. Lourival Melo Mota s/n, Maceió-AL 57072-970 Brazil
| | | | | | | | - Lauro T. Kubota
- Instituto de Química; UNICAMP; C. Postal 6154 13084-971 Campinas, SP Brazil
| | - Marilia O. F. Goulart
- Universidade Federal de Alagoas; Av. Lourival Melo Mota s/n, Maceió-AL 57072-970 Brazil
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19
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Yun W, Jiang J, Cai D, Zhao P, Liao J, Sang G. Ultrasensitive visual detection of DNA with tunable dynamic range by using unmodified gold nanoparticles and target catalyzed hairpin assembly amplification. Biosens Bioelectron 2016; 77:421-7. [DOI: 10.1016/j.bios.2015.09.065] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2015] [Revised: 09/24/2015] [Accepted: 09/27/2015] [Indexed: 12/14/2022]
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20
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Bhattacharya D, Bhattacharyya A, Karmakar P. Evaluation of Different Oxidative Stress Parameters and Apoptosis in Human Cervical Cancer Cells Exposed to Rod and Spherical Shaped Zinc Oxide Nanoparticles. BIONANOSCIENCE 2015. [DOI: 10.1007/s12668-015-0186-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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21
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The biological stimuli for governing the phase transition temperature of the “smart” polymer PNIPAM in water. Colloids Surf B Biointerfaces 2015; 135:588-595. [DOI: 10.1016/j.colsurfb.2015.08.020] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Revised: 08/10/2015] [Accepted: 08/17/2015] [Indexed: 01/13/2023]
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22
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Hayashida O, Kojima K. Entrapment and Release of Guest Molecules by Reduction-Responsive Cyclophane Dimers Based on Disulfide Linkage. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2015. [DOI: 10.1246/bcsj.20140370] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Affiliation(s)
- Osamu Hayashida
- Department of Chemistry, Faculty of Science, Fukuoka University
| | - Keiko Kojima
- Department of Chemistry, Faculty of Science, Fukuoka University
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23
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Gu J, Hu D, Wang W, Zhang Q, Meng Z, Jia X, Xi K. Carbon dot cluster as an efficient "off-on" fluorescent probe to detect Au(III) and glutathione. Biosens Bioelectron 2014; 68:27-33. [PMID: 25558871 DOI: 10.1016/j.bios.2014.12.027] [Citation(s) in RCA: 116] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2014] [Revised: 11/30/2014] [Accepted: 12/09/2014] [Indexed: 01/09/2023]
Abstract
In this paper, we reported for the first time that Au(III) decorated carbon dot cluster (Au(III)/CDC) was synthesized to detect glutathione through fluorescence "off-on" approach. The "off" process was realized by the introduction of Au(III) on luminescent carbon dots (CDs), which formed the complex of Au(III)/CDC and quenched the fluorescence of CDs efficiently. This "off" process was used to detect Au(III) with the selectivity among 21 metal ions and the limitation was 0.48 μM (S/N=3). Au(III) could be removed from the complex by biothiol in the solution, which restored the fluorescence of CDC to achieve the "on" process. This process was selective for biothiols (especially for glutathione) among saccharides, dopamine and amino acids and the limit of detection was 2.02 μM (S/N=3). Due to the dependence of the fluorescence restoration on the concentration of glutathione, Au(III)/CDC was applied as the fluorescence sensor for detection of glutathione in the solution and cellular cytosol. By referring to the fluorescence change in the solution, the intracellular glutathione with/without oxygen stress was evaluated. As compared with the commercial assay, our Au(III)/CDC based assay was simple, facile and low cost, which would be useful to measure intracellular glutathione at different cellular states.
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Affiliation(s)
- Jiangjiang Gu
- State Key Laboratory of Coordination Chemistry, Department of Polymer Science & Engineering, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing 210093, PR China
| | - Donghua Hu
- Department of Polymer Science & Engineering, Nanjing University, Nanjing 210093, PR China
| | - Weina Wang
- State Key Laboratory of Coordination Chemistry, Department of Polymer Science & Engineering, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing 210093, PR China
| | - Qiuhong Zhang
- State Key Laboratory of Coordination Chemistry, Department of Polymer Science & Engineering, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing 210093, PR China
| | - Zhen Meng
- State Key Laboratory of Coordination Chemistry, Department of Polymer Science & Engineering, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing 210093, PR China
| | - Xudong Jia
- State Key Laboratory of Coordination Chemistry, Department of Polymer Science & Engineering, Nanjing National Laboratory of Microstructures, Nanjing University, Nanjing 210093, PR China; Department of Polymer Science & Engineering, Nanjing University, Nanjing 210093, PR China; Huaian High-Tech Research Institute of Nanjing University, Huaian 223005, PR China.
| | - Kai Xi
- Department of Polymer Science & Engineering, Nanjing University, Nanjing 210093, PR China; Huaian High-Tech Research Institute of Nanjing University, Huaian 223005, PR China.
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24
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Yang Y, Guan X. Rapid and thiol-specific high-throughput assay for simultaneous relative quantification of total thiols, protein thiols, and nonprotein thiols in cells. Anal Chem 2014; 87:649-55. [PMID: 25423115 PMCID: PMC4287829 DOI: 10.1021/ac503411p] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
![]()
Thiol groups in biological molecules
play a significant role in
various physiological functions and pathological conditions. Thiols
are divided into two major groups: protein thiols and nonprotein thiols.
Numerous methods have been reported for thiol assays. Most of these
methods have been developed for glutathione, the principal nonprotein
thiol, despite the fact that cellular protein thiols are more abundant
than glutathione. Further, these methods usually involve a process
of biological sample preparation followed by a separation method,
and they are time-consuming. We reported previously a series of thiol-specific
fluorogenic benzofurazan sulfides. These nonfluorescent benzofurazan
sulfides react rapidly and specifically with a thiol to form a strong
fluorescent thiol adduct. The rapid reaction, thiol-specific and fluorogenic
nature of the sulfides successfully yielded an application of one
of the sulfides for relative quantitation of total thiols in live
cells through fluorescence microscopy. In this work, we employed the
same compound to develop the first high-throughput method for simultaneous
monitoring of protein thiols, nonprotein thiols, and total thiols
in cells in a 96-well plate on a fluorescence microplate reader at
λex = 430 nm and λem = 520 nm, respectively.
The method is rapid and sensitive, and has been validated by an HPLC
thiol assay method. The method can detect thiols with cell concentrations
as low as 500 cells/well. We also demonstrated that the method can
readily monitor changes in cellular thiol levels. Although the method
cannot provide an absolute quantification for thiols because fluorescence
intensity of different thiol adducts varies, it provides an accurate
measurement of relative quantification, relative to the control. The
method will be a valuable tool in thiol-related biomedical/pharmaceutical
research.
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Affiliation(s)
- Yang Yang
- Department of Pharmaceutical Sciences, College of Pharmacy South Dakota State University , Brookings, South Dakota 57007, United States
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25
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Zhai L, Liang J, Guo X, Zhao Y, Wu C. Extraordinary Modulation of Disulfide Redox-Responsiveness by Cooperativity of Twin-Disulfide Bonds. Chemistry 2014; 20:17507-14. [DOI: 10.1002/chem.201404909] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2014] [Indexed: 11/10/2022]
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26
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Liu CP, Wu TH, Liu CY, Lin SY. Live-cell imaging of biothiols via thiol/disulfide exchange to trigger the photoinduced electron transfer of gold-nanodot sensor. Anal Chim Acta 2014; 849:57-63. [PMID: 25300218 DOI: 10.1016/j.aca.2014.08.022] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Revised: 08/08/2014] [Accepted: 08/11/2014] [Indexed: 12/01/2022]
Abstract
Biothiols have been reported to involve in intracellular redox-homeostasis against oxidative stress. In this study, a highly selective and sensitive fluorescent probe for sensing biothiols is explored by using an ultrasmall gold nanodot (AuND), the dendrimer-entrapped Au8-cluster. This strategy relies upon a thiol/disulfide exchange to trigger the fluorescence change through a photoinduced electron transfer (PET) process between the Au8-cluster (as an electron donor) and 2-pyridinethiol (2-PyT) (as an electron acceptor) for sensing biothiols. When 2-PyT is released via the cleavage of disulfide bonds by biothiols, the PET process from the Au8-cluster to 2-PyT is initiated, resulting in fluorescence quenching. The fluorescence intensity was found to decrease linearly with glutathione (GSH) concentration (0-1500μM) at physiological relevant levels and the limit of detection for GSH was 15.4μM. Compared to most nanoparticle-based fluorescent probes that are limited to detect low molecular weight thiols (LMWTs; i.e., GSH and cysteine), the ultrasmall Au8-cluster-based probe exhibited less steric hindrance and can be directly applied in selectively and sensitively detecting both LMWTs and high molecular weight thiols (HMWTs; i.e., protein thiols). Based on such sensing platform, the surface-functionalized Au8-cluster has significant promise for use as an efficient nanoprobe for intracellular fluorescence imaging of biothiols including protein thiols in living cells whereas other nanoparticle-based fluorescent probes cannot.
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Affiliation(s)
- Ching-Ping Liu
- Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, 35 Keyan Road, Zhunan, Miaoli 35053, Taiwan
| | - Te-Haw Wu
- Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, 35 Keyan Road, Zhunan, Miaoli 35053, Taiwan
| | - Chia-Yeh Liu
- Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, 35 Keyan Road, Zhunan, Miaoli 35053, Taiwan
| | - Shu-Yi Lin
- Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, 35 Keyan Road, Zhunan, Miaoli 35053, Taiwan.
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27
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Phillips DJ, Gibson MI. Redox-sensitive materials for drug delivery: targeting the correct intracellular environment, tuning release rates, and appropriate predictive systems. Antioxid Redox Signal 2014; 21:786-803. [PMID: 24219144 DOI: 10.1089/ars.2013.5728] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
SIGNIFICANCE The development of responsive drug delivery systems (DDS) holds great promise as a tool for improving the pharmacokinetic properties of drug compounds. Redox-sensitive systems are particularly attractive given the rich variety of redox gradients present in vivo. These gradients, where the circulation is generally considered oxidizing and the cellular environment is substantially more reducing, provide attractive options for targeted, specific cargo delivery. RECENT ADVANCES Experimental evidence suggests that a "one size fits all" redox gradient does not exist. Rather, there are subtle differences in redox potential within a cell, while the chemical nature of reducing agents in these microenvironments varies. Recent works have demonstrated an ability to modulate the degradation rate of redox-susceptible groups and, hence, provide new tools to engineer precision-targeted DDS. CRITICAL ISSUES Modern synthetic and macromolecular chemistry provides access to a wide range of redox-susceptible architectures. However, in order to utilize these in real applications, the actual chemical nature of the redox-susceptible group, the sub-cellular location being targeted, and the redox microenvironment being encountered should be considered in detail. This is critical to avoid the over-simplification possible when using non-biological reducing agents, which may provide inaccurate kinetic information, and to ensure these materials can be advanced beyond simple "on/off" systems. Furthermore, a strong case can be made for the use of biorelevant reducing agents such as glutathione when demonstrating a materials redox response. FUTURE DIRECTIONS A further understanding of the complexities of the extra- and intracellular microenvironments would greatly assist with the design and application of DDS.
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Affiliation(s)
- Daniel J Phillips
- Department of Chemistry, University of Warwick , Coventry, United Kingdom
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28
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Jirawutthiwongchai J, Draeger G, Chirachanchai S. Rapid hybridization of chitosan-gold-antibodies via metal-free click in water-based systems: a model approach for naked-eye detectable antigen sensors. Macromol Rapid Commun 2014; 35:1204-10. [PMID: 24729187 DOI: 10.1002/marc.201400092] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2014] [Revised: 03/17/2014] [Indexed: 11/09/2022]
Abstract
A surface plasmon resonance (SPR) expression after hybridization of chitosan-gold nanoparticle-antibody (CS-AuNPs-Ab) based on: i) metal-free click chemistry, and, ii) in water system as an approach for a rapid antigen sensing, is proposed. The chitosan-hydroxybenzyl triazole complex enables us to carry out the conjugation of mPEG and trifluoromethylated oxanorbornadiene (OND) in water. CS-mPEG-OND further allows metal-free click to hybridize chitosan (CS) with azido-modified gold nanoparticles (azido-AuNPs) in aqueous solution at room temperature. The CS-mPEG-OND conjugated with LipL32 antibody (Ab) not only effectively binds with LipL32 antigen (Ag) but also performs the cycloaddition with azido-AuNPs to display a change in color within 2 min. The phenomenon leads to a simple and efficient naked-eye antigen detection technique.
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29
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Apyari VV, Arkhipova VV, Dmitrienko SG, Zolotov YA. Using gold nanoparticles in spectrophotometry. JOURNAL OF ANALYTICAL CHEMISTRY 2013. [DOI: 10.1134/s1061934814010031] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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30
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Magnetic Fe₃O₄-Based Sandwich-Type Biosensor Using Modified Gold Nanoparticles as Colorimetric Probes for the Detection of Dopamine. MATERIALS 2013; 6:5690-5699. [PMID: 28788417 PMCID: PMC5452739 DOI: 10.3390/ma6125690] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Revised: 11/27/2013] [Accepted: 12/02/2013] [Indexed: 01/08/2023]
Abstract
In this work, we designed a visual biosensor for dopamine (DA) detection using magnetic Fe3O4 particles and dithiobis(sulfosuccinimidylpropionate)-modified gold nanoparticles (DTSSP-AuNPs) as the recognition elements. Specifically, DA molecules were assembled onto the surface of DTSSP-AuNPs via the amine coupling reaction between the amino group of DA and activated carboxyl group of DTSSP. Accordingly, DA-anchored DTSSP-AuNPs were captured by Fe3O4 through the interaction of catechol and iron. In a magnetic field, the formed Fe3O4-DA-DTSSP-AuNPs conjugates were easily removed from the solution, leading to fading of the AuNPs suspension and decrease of the UV/Vis signal. As a result, a detection limit of 10 nM for DA was achieved. The theoretical simplicity and high selectivity demonstrated that the sandwich-type strategy based on Fe3O4 and AuNPs would lead to many colorimetric detection applications in clinical study by rationally designing the surface chemistry of AuNPs and Fe3O4.
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31
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Liu P, Tang W, Zhang H. Unusual solution phase transition trend of poly(N-isopropylacrylamide-co-bis(N-hydroxyisopropyl pyrrolidone) 2-vinylterephthalate). POLYMER 2013. [DOI: 10.1016/j.polymer.2013.06.053] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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32
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Jung JH, Jung SH, Lee JH, Choi MY. NTA-Functionalized Gold Nanoparticles for Visual Detection of Uranyl Ion. B KOREAN CHEM SOC 2013. [DOI: 10.5012/bkcs.2013.34.7.2183] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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33
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Huang R, Wang X, Wang D, Liu F, Mei B, Tang A, Jiang J, Liang G. Multifunctional Fluorescent Probe for Sequential Detections of Glutathione and Caspase-3 in Vitro and in Cells. Anal Chem 2013; 85:6203-7. [DOI: 10.1021/ac4014012] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Affiliation(s)
- Rui Huang
- CAS Key Laboratory of Soft Matter
Chemistry, Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui
230026, China
| | - Xijun Wang
- Department
of Chemical Physics, University of Science and Technology of China, 96 Jinzhai
Road, Hefei, Anhui 230026, China
| | - Dingli Wang
- CAS Key Laboratory of Soft Matter
Chemistry, Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui
230026, China
| | - Fang Liu
- CAS Key Laboratory of Soft Matter
Chemistry, Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui
230026, China
| | - Bin Mei
- CAS Key Laboratory of Soft Matter
Chemistry, Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui
230026, China
| | - Anming Tang
- CAS Key Laboratory of Soft Matter
Chemistry, Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui
230026, China
| | - Jun Jiang
- Department
of Chemical Physics, University of Science and Technology of China, 96 Jinzhai
Road, Hefei, Anhui 230026, China
| | - Gaolin Liang
- CAS Key Laboratory of Soft Matter
Chemistry, Department of Chemistry, University of Science and Technology of China, 96 Jinzhai Road, Hefei, Anhui
230026, China
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34
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Zhu X, Hondroulis E, Liu W, Li CZ. Biosensing approaches for rapid genotoxicity and cytotoxicity assays upon nanomaterial exposure. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2013; 9:1821-30. [PMID: 23417999 DOI: 10.1002/smll.201201593] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2012] [Revised: 08/28/2012] [Indexed: 05/21/2023]
Abstract
The increased utilization of nanomaterials could affect human health and the environment due to increased exposure. Several mechanisms regarding the negative effects of nanomaterials have been proposed, one of the most discussed being oxidative stress. Many studies have shown that some metal oxide nanoparticles can enhance reactive oxygen species generation, inducing oxidative stress, DNA damage, and unregulated cell signaling, and eventually leading to changes in cell motility, apoptosis, and even carcinogenesis. 8-Hydroxy-2'-deoxyguanosine (8-OHdG) is one of the predominant forms of oxidative DNA damage, and has therefore been widely used as a biomarker for oxidative stress and carcinogenesis. Ther are two major objectives to this study. Firstly, the development of a novel lateral flow immunoassay (LFIA) is presented to measure the concentration of 8-OHdG in cells and thus reveal the nanotoxicity on the genomic level. The feasibility of this new method is validated by comparison with two other established methods: Alamar Blue assay and a recently developed electrical impedance sensing (EIS) system on the level of cell proliferation/viability. Secondly, the toxicological effects of three metallic nanoparticles (CuO, CdO, and TiO2 ) are investigated and compared using these three methods with completely different mechanisms. The results show that there is a high variation among different nanoparticles concerning their ability to cause toxic effects. CuO nanoparticles are the most potent regarding cytotoxicity and DNA damage. CdO shows a fallen cell viability as well as DNA damage, however, to a lesser extent than CuO nanoparticles. TiO2 particles only cause very limited cytotoxicity, and there is no obvious increase in 8-OHdG levels. In conclusion, LFIA as well as the EIS system are useful methods for quantitative or qualitative nanotoxicity assessments with high sensitivity, specificity, speed of performance, and simplicity.
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Affiliation(s)
- Xuena Zhu
- Nanobioengineering/Bioelectronics Lab, Department of Biomedical Engineering, Florida International University, 10555 West Flagler Street, Miami, FL 33174, USA
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Hayashida O, Ichimura K, Sato D, Yasunaga T. Synthesis, guest-binding, and reduction-responsive degradation properties of water-soluble cyclophanes having disulfide moieties. J Org Chem 2013; 78:5463-9. [PMID: 23679225 DOI: 10.1021/jo400591w] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Water-soluble cationic cyclophane having diphenyl disulfide moieties (1a) was synthesized as a reduction-responsive degradable host. The stoichiometry for the complex of 1a with anionic fluorescence guests, such as 4,4'-bis(1-anilinonaphthalene-8-sulfonate) (Bis-ANS) and 4-(1-pyrene)-butanoic acid (PBA), was confirmed to be 1:1 host:guest by a Job plot. The binding constants (K) of 1a toward Bis-ANS and PBA were evaluated to be 6.7 × 10(3) and 4.5 × 10(4) M(-1), respectively, as confirmed by fluorescence spectroscopy. Reduction of disulfide bonds of 1a by dithiothreitol gave its reduced form having poor guest-binding affinity that led to release of the entrapped guest molecules to the bulk aqueous phase. Meanwhile, anionic cyclophane 1b, which was derived from 1a by a reaction with succinic anhydride, binds cationic anticancer drugs, such as daunorubicin hydrochloride (DNR) and doxorubicin hydrochloride (DOX), with a K of 2.1 × 10(3) and 7.5 × 10(2) M(-1), respectively. A similar reduction-responsive guest release feature was observed when DNR and DOX were employed as a guest for complexation with 1b.
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Affiliation(s)
- Osamu Hayashida
- Department of Chemistry, Faculty of Science, Fukuoka University , 8-19-1 Nanakuma, Fukuoka 814-0180, Japan.
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Lee MH, Yang Z, Lim CW, Lee YH, Dongbang S, Kang C, Kim JS. Disulfide-Cleavage-Triggered Chemosensors and Their Biological Applications. Chem Rev 2013; 113:5071-109. [DOI: 10.1021/cr300358b] [Citation(s) in RCA: 602] [Impact Index Per Article: 54.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- Min Hee Lee
- Department of Chemistry, Korea University, Seoul 136-701, Korea
| | - Zhigang Yang
- Department of Chemistry, Korea University, Seoul 136-701, Korea
| | - Choon Woo Lim
- East−West Medical Science, Kyung Hee University, Yongin 446-701, Korea
| | - Yun Hak Lee
- Department of Chemistry, Korea University, Seoul 136-701, Korea
| | - Sun Dongbang
- Department of Chemistry, Korea University, Seoul 136-701, Korea
| | - Chulhun Kang
- East−West Medical Science, Kyung Hee University, Yongin 446-701, Korea
| | - Jong Seung Kim
- Department of Chemistry, Korea University, Seoul 136-701, Korea
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Colorimetric assay of matrix metalloproteinase activity based on metal-induced self-assembly of carboxy gold nanoparticles. Biosens Bioelectron 2013; 41:833-9. [DOI: 10.1016/j.bios.2012.10.025] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2012] [Revised: 10/06/2012] [Accepted: 10/08/2012] [Indexed: 12/27/2022]
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38
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Zinc oxide nanoparticle induced autophagic cell death and mitochondrial damage via reactive oxygen species generation. Toxicol In Vitro 2013; 27:1187-95. [PMID: 23458966 DOI: 10.1016/j.tiv.2013.02.010] [Citation(s) in RCA: 186] [Impact Index Per Article: 16.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2012] [Revised: 12/20/2012] [Accepted: 02/12/2013] [Indexed: 01/07/2023]
Abstract
Zinc oxide nanoparticles (ZnO-np) are used in an increasing number of industrial products such as paint, coating and cosmetics, and in other biological applications. There have been many suggestions of a ZnO-np toxicity paradigm but the underlying molecular mechanisms about the toxicity of ZnO-np remain unclear. This study was done to determine the potential toxicity of ZnO-np and to assess the toxicity mechanism in normal skin cells. Synthesized ZnO-np generated reactive oxygen species (ROS), as determined by electron spin resonance. After uptake into cells, ZnO-np induced ROS in a concentration- and time-dependent manner. To demonstrate ZnO-np toxicity mechanism related to ROS, we detected abnormal autophagic vacuoles accumulation and mitochondria dysfunction after ZnO-np treatment. Furthermore mitochondria membrane potential and adenosine-5'-triphosphate (ATP) production are decreased for culture with ZnO-np. We conclude that ZnO-np leads to cell death through autophagic vacuole accumulation and mitochondria damage in normal skin cells via ROS induction. Accordingly, ZnO-np may cause toxicity and the results highlight and need for careful regulation of ZnO-np production and use.
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Yuan Y, Zhang J, Wang M, Mei B, Guan Y, Liang G. Detection of glutathione in vitro and in cells by the controlled self-assembly of nanorings. Anal Chem 2013; 85:1280-4. [PMID: 23298193 DOI: 10.1021/ac303183v] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Taking advantage of a reduction-controlled biocompatible condensation reaction and self-assembly, we have developed a new method for the determination of glutathione (GSH) concentration in vitro and in HepG2 human liver cancer cells. Upon reduction by GSH under physiological conditions (pH 7.4 in buffer), the small molecule CBT-Cys(SEt) condenses and self-assembles into nanorings, increasing the UV absorbance at 380 nm (with significant linear correlation in the 0-87 μM GSH range and a limit of detection of 1 μM). This method is also selective to GSH rather than cysteine in biological samples. Through the use of added internal standards, we successfully determined the concentration of GSH in HepG2 cells to be 14.96 μM (2.99 fmol/cell). To better understand the mechanism of nanoring self-assembly, the condensation product of CBT-Cys(SEt) formed using different concentrations of GSH and different reaction times were characterized by transmission electron microscopy (TEM).
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Park SY, Kwon D, Mok H, Chung BH. Simple and rapid detection of l-Dopa decarboxylase activity using gold nanoparticles. Analyst 2013; 138:3146-9. [DOI: 10.1039/c3an00009e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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41
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Hun X, Sun W, Zhu H, Du F, Liu F, Xu Y, He Y. Design of electrochemical detection of thiols based on the cleavage of the disulfide bond coupled with thionine modified gold nanoparticle-assisted amplification. Chem Commun (Camb) 2013; 49:9603-5. [DOI: 10.1039/c3cc44487b] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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42
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Tang J, Kong B, Wang Y, Xu M, Wang Y, Wu H, Zheng G. Photoelectrochemical detection of glutathione by IrO2-hemin-TiO2 nanowire arrays. NANO LETTERS 2013; 13:5350-4. [PMID: 24073599 DOI: 10.1021/nl4028507] [Citation(s) in RCA: 121] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
We have developed sensitive detection of glutathione using the IrO2-hemin-TiO2 nanowire arrays. Single-crystalline TiO2 nanowires are synthesized by a hydrothermal reaction, followed by surface functionalization of ~3 nm thick hemin and ~1-2 nm diameter IrO2 nanoparticles. The IrO2-hemin-TiO2 nanowire arrays offer much enhanced photocurrent with ∼100% increase compared to the pristine TiO2 nanowires and allow for label-free, real-time, sensitive photoelectrochemical detection of glutathione. The sensitivity achieved is ~10 nM in buffer, comparable to or better than most of the existing glutathione detection methods. Furthermore, cell extracts containing glutathione are robustly detected, with ~8000 cells/mL for HeLa cells and ~5000 cells/mL for human embryonic kidney 293T cells. This nanowire PEC sensor assay exhibits excellent selectivity and stability, suggesting a potential detection platform for analyzing the glutathione level in biosamples.
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Affiliation(s)
- Jing Tang
- Laboratory of Advanced Materials, Department of Chemistry, Fudan University , Shanghai, 200433, People's Republic of China
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43
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Hu B, Cao X, Zhang P. Selective colorimetric detection of glutathione based on quasi-stable gold nanoparticles assembly. NEW J CHEM 2013. [DOI: 10.1039/c3nj00978e] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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44
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Hayashida O, Ichimura K. Synthesis and Characterization of Reduction-responsive Cyclophane Dimer Based on Disulfide Linkage. CHEM LETT 2012. [DOI: 10.1246/cl.2012.1650] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Osamu Hayashida
- Department of Chemistry, Faculty of Science, Fukuoka University
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Abstract
Thiols are important molecules in the environment and in biological processes. Cysteine (Cys), homocysteine (Hcy), glutathione (GSH) and hydrogen sulfide (H2S) play critical roles in a variety of physiological and pathological processes. The selective detection of thiols using reaction-based probes and sensors is very important in basic research and in disease diagnosis. This review focuses on the design of fluorescent and colorimetric probes and sensors for thiol detection. Thiol detection methods include probes and labeling agents based on nucleophilic addition and substitution, Michael addition, disulfide bond or Se-N bond cleavage, metal-sulfur interactions and more. Probes for H2S are based on nucleophilic cyclization, reduction and metal sulfide formation. Thiol probe and chemosensor design strategies and mechanism of action are discussed in this review.
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46
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Xiao Q, Gao H, Lu C, Yuan Q. Gold nanoparticle-based optical probes for sensing aminothiols. Trends Analyt Chem 2012. [DOI: 10.1016/j.trac.2012.07.017] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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47
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Li Y, Yang Y, Guan X. Benzofurazan sulfides for thiol imaging and quantification in live cells through fluorescence microscopy. Anal Chem 2012; 84:6877-83. [PMID: 22794193 DOI: 10.1021/ac301306s] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Thiol groups play a significant role in various cellular functions. Cellular thiol concentrations can be affected by various physiological or pathological factors. A fluorescence imaging agent that can effectively and specifically image thiols in live cells through fluorescence microscopy is desirable for live cell thiol monitoring. Benzofurazan sulfides 1a-1e were synthesized and found to be thiol specific fluorogenic agents except 1d. They are not fluorescent but form strong fluorescent thiol adducts after reacting with thiols through a sulfide-thiol exchange reaction. On the other hand, they exhibit no reaction with other biologically relevant nucleophilic functional groups such as -NH(2), -OH, or -COOH revealing the specificity for the detection of thiols. Sulfide 1a was selected to confirm its ability to image cellular thiols through fluorescence microscopy. The compound was demonstrated to effectively image and quantify thiol changes in live cells through fluorescence microscopy using 430 and 520 nm as the excitation and emission wavelengths, respectively. The quantification results of total thiol in live cells obtained from fluorescence microscopy were validated by an high-pressure liquid chromatography/ultraviolet (HPLC/UV) total thiol assay method. The reagents and method will be of a great value to thiol redox-related research.
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Affiliation(s)
- Yinghong Li
- Department of Pharmaceutical Sciences, College of Pharmacy, South Dakota State University, Brookings, South Dakota 57007, USA
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48
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Liu P, Xie H, Tang H, Zhong G, Zhang H. Unusual effect of molecular weight and concentration on thermoresponsive behaviors of well-defined water-soluble semirigid polymers. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/pola.26158] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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49
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Zhang J, Yang C, Wang X, Yang X. Colorimetric recognition and sensing of thiocyanate with a gold nanoparticle probe and its application to the determination of thiocyanate in human urine samples. Anal Bioanal Chem 2012; 403:1971-81. [DOI: 10.1007/s00216-012-6002-y] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2012] [Revised: 03/17/2012] [Accepted: 03/30/2012] [Indexed: 10/28/2022]
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50
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Zhang J, Yang C, Wang X, Yang X. Colorimetric recognition and sensing of nitrite with unmodified gold nanoparticles based on a specific diazo reaction with phenylenediamine. Analyst 2012; 137:3286-92. [DOI: 10.1039/c2an35204d] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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