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Article ; Online: A colorimetric aptasensor for detecting ochratoxin A based on label-free aptamer and gold nanozyme.

Tang, Jidong / Tian, Bing / Tao, Xiaoqi

Analytical sciences : the international journal of the Japan Society for Analytical Chemistry

2023 Volume 39, Issue 10, Page(s) 1623–1626

Abstract: In this study, the aptamer of ochratoxin A (OTA) increased the negative charge density on the surface of gold nanoparticles (AuNPs) and promoted the release of hydroxyl radicals and ... ...

Abstract	In this study, the aptamer of ochratoxin A (OTA) increased the negative charge density on the surface of gold nanoparticles (AuNPs) and promoted the release of hydroxyl radicals and Au
MeSH term(s)	Gold ; Metal Nanoparticles ; Aptamers, Nucleotide ; Colorimetry ; Biosensing Techniques ; Limit of Detection
Chemical Substances	Gold (7440-57-5) ; ochratoxin A (1779SX6LUY) ; Aptamers, Nucleotide
Language	English
Publishing date	2023-08-11
Publishing country	Switzerland
Document type	Journal Article
ZDB-ID	1483376-1
ISSN	1348-2246 ; 1348-2246
ISSN (online)	1348-2246
ISSN	1348-2246
DOI	10.1007/s44211-023-00404-7
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Article: Iron oxide nanoparticles oxidize transformed RAW 264.7 macrophages into foam cells: Impact of pulmonary surfactant component dipalmitoylphosphatidylcholine

Li, Haidong / Tao, Xiaoqi / Song, Erqun / Song, Yang

Chemosphere. 2022 Aug., v. 300

2022

Abstract: Iron oxide nanoparticles (IONPs) are one of the most important components in airborne particulate matter that originally generated from traffic emission, iron ore mining, coal combustion and melting of engine fragments. Once IONPs entered respiratory ... ...

Abstract	Iron oxide nanoparticles (IONPs) are one of the most important components in airborne particulate matter that originally generated from traffic emission, iron ore mining, coal combustion and melting of engine fragments. Once IONPs entered respiratory tract and deposit in the alveoli, they may interact with pulmonary surfactant (PS) that distributed in the alveolar lining. Thereafter, it is necessary to investigate the interaction of inhaled IONPs and PS, which helps the understanding of health risk of respiratory health induced by IONPs. Using dipalmitoyl phosphatidylcholine (DPPC), the major components of PS, as a lipid model, we explored the interaction of DPPC with typical IONPs, Fe₃O₄ NPs and amino-functionalized analogue (Fe₃O₄–NH₂ NPs). DPPC was readily adsorbed on the surface of both IONPs. Although DPPC corona depressed the cellular uptake of IONPs, IONPs@DPPC complexes caused higher cytotoxicity toward RAW 264.7 macrophages, compared to pristine IONPs. Mechanistic studies have shown that IONPs react with intracellular hydrogen peroxide, which promotes the Fenton reaction, to generate hydroxyl radicals. Iron ions could oxidize lipids to form lipid peroxides, and lipid hydroperoxides will decompose to generate hydroxyl radicals, which further promote cellular oxidative stress, lipid accumulation, foam cell formation, and the release of inflammatory factors. These findings demonstrated the phenomenon of coronal component oxidation, which contributed to IONPs-induced cytotoxicity. This study offered a brand-new toxicological mechanism of IONPs at the molecular level, which is helpful for further understanding the adverse effects of IONPs.
Keywords	coal ; combustion ; cytotoxicity ; foam cells ; foams ; hydrogen peroxide ; iron oxides ; lipid peroxides ; models ; oxidative stress ; particulates ; phosphatidylcholines ; respiratory system ; risk ; surfactants ; toxicology ; traffic
Language	English
Dates of publication	2022-08
Publishing place	Elsevier Ltd
Document type	Article
ZDB-ID	120089-6
ISSN	1879-1298 ; 0045-6535 ; 0366-7111
ISSN (online)	1879-1298
ISSN	0045-6535 ; 0366-7111
DOI	10.1016/j.chemosphere.2022.134617
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Article ; Online: Iron oxide nanoparticles oxidize transformed RAW 264.7 macrophages into foam cells: Impact of pulmonary surfactant component dipalmitoylphosphatidylcholine.

Li, Haidong / Tao, Xiaoqi / Song, Erqun / Song, Yang

Chemosphere

2022 Volume 300, Page(s) 134617

Abstract	Iron oxide nanoparticles (IONPs) are one of the most important components in airborne particulate matter that originally generated from traffic emission, iron ore mining, coal combustion and melting of engine fragments. Once IONPs entered respiratory tract and deposit in the alveoli, they may interact with pulmonary surfactant (PS) that distributed in the alveolar lining. Thereafter, it is necessary to investigate the interaction of inhaled IONPs and PS, which helps the understanding of health risk of respiratory health induced by IONPs. Using dipalmitoyl phosphatidylcholine (DPPC), the major components of PS, as a lipid model, we explored the interaction of DPPC with typical IONPs, Fe
MeSH term(s)	1,2-Dipalmitoylphosphatidylcholine ; Foam Cells ; Iron ; Macrophages ; Magnetic Iron Oxide Nanoparticles ; Nanoparticles ; Pulmonary Surfactants/pharmacology
Chemical Substances	Pulmonary Surfactants ; 1,2-Dipalmitoylphosphatidylcholine (2644-64-6) ; Iron (E1UOL152H7)
Language	English
Publishing date	2022-04-14
Publishing country	England
Document type	Journal Article
ZDB-ID	120089-6
ISSN	1879-1298 ; 0045-6535 ; 0366-7111
ISSN (online)	1879-1298
ISSN	0045-6535 ; 0366-7111
DOI	10.1016/j.chemosphere.2022.134617
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Article ; Online: High-performance colorimetric immunoassay for determination of chloramphenicol using metal-organic framework-based hybrid composites with increased peroxidase activity.

Wang, Xin / Lu, Zhisong / Sun, Wei / Ye, Sudan / Tao, Xiaoqi

Mikrochimica acta

2022 Volume 189, Issue 12, Page(s) 484

Abstract: Metal-organic frameworks (MOFs) as carriers for high-capacity loading of HRP-IgG and gold nanoparticles are introduced, to prepare MOF hybrids with enhanced peroxidase activity. The prepared MOF hybrids were employed to establish an indirect competitive ... ...

Abstract	Metal-organic frameworks (MOFs) as carriers for high-capacity loading of HRP-IgG and gold nanoparticles are introduced, to prepare MOF hybrids with enhanced peroxidase activity. The prepared MOF hybrids were employed to establish an indirect competitive colorimetric immunoassay for chloramphenicol (CAP) detection, in which the limit of detection for CAP is 0.006 μg·L
MeSH term(s)	Peroxidase ; Metal-Organic Frameworks ; Colorimetry ; Chloramphenicol ; Gold ; Metal Nanoparticles ; Peroxidases ; Immunoassay ; Coloring Agents
Chemical Substances	Peroxidase (EC 1.11.1.7) ; Metal-Organic Frameworks ; Chloramphenicol (66974FR9Q1) ; Gold (7440-57-5) ; Peroxidases (EC 1.11.1.-) ; Coloring Agents
Language	English
Publishing date	2022-11-30
Publishing country	Austria
Document type	Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	89-9
ISSN	1436-5073 ; 0026-3672
ISSN (online)	1436-5073
ISSN	0026-3672
DOI	10.1007/s00604-022-05586-x
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Article ; Online: Controllable and complete conversion of agarose into oligosaccharides and monosaccharides by microwave-assisted hydrothermal and enzymatic hydrolysis and antibacterial activity of agaro-oligosaccharides.

Shen, Ji / Dan, Meiling / Li, Yanping / Tao, Xiaoqi / Zhao, Guohua / Wang, Damao

International journal of biological macromolecules

2023 Volume 251, Page(s) 126319

Abstract: Hydrolysis of agar or agarose can yield two types of oligosaccharides: agaro-oligosaccharides (AOS) and neoagaro-oligosaccharides (NAOS). These oligosaccharides have various biological activities and promising applications in the future food industry and ...

Abstract	Hydrolysis of agar or agarose can yield two types of oligosaccharides: agaro-oligosaccharides (AOS) and neoagaro-oligosaccharides (NAOS). These oligosaccharides have various biological activities and promising applications in the future food industry and pharmaceuticals. In this study, we prepared AOS from agarose by microwave-assisted hydrothermal hydrolysis and then used a commercial β-galactosidase to treat AOS for producing NAOS. A complete conversion from agarose to AOS or NAOS can be achieved by microwave hydrothermal treatment and one-step enzyme reaction, and the production process was completely green. In addition, we combined β-galactosidase and α-neoagarobiose hydrolase from Saccharophagus degradans 2-40 (SdNABH) to treat AOS, and AOS was completely converted into monosaccharides. Then the results of the inhibitory activity of AOS on the growth of Streptococcus mutans showed that AOS might be a good potential sugar substitute for dental caries prevention. This study provides an efficient approach for the production of multiple mixed degrees of polymerization (DP) of pure AOS and NAOS without requiring acid catalyst and agarases while simplifying the production processes and reducing costs.
Language	English
Publishing date	2023-08-14
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	282732-3
ISSN	1879-0003 ; 0141-8130
ISSN (online)	1879-0003
ISSN	0141-8130
DOI	10.1016/j.ijbiomac.2023.126319
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Article ; Online: Preparation, characterization and evaluation of capsaicin-loaded indica rice starch nanoparticles

Tao, Xiaoqi / Zhan, Lei / Huang, Yanxia / Li, Pan / Liu, Baona / Chen, Pei

Food Chemistry. 2022 Aug., v. 386 p.132692-

2022

Abstract: Capsaicin (CAP) is an alkaloid with multiple physiological effects, but its application is difficult. In this research, indica rice starch nanoparticles (IRSNPs) based nanocarrier was used to load CAP to obtain capsaicin-loaded indica rice starch ... ...

Abstract	Capsaicin (CAP) is an alkaloid with multiple physiological effects, but its application is difficult. In this research, indica rice starch nanoparticles (IRSNPs) based nanocarrier was used to load CAP to obtain capsaicin-loaded indica rice starch nanoparticles (CAP-IRSNPs). The microstructure, characteristics and in vitro release behaviors of CAP-IRSNPs were analyzed. CAP-IRSNPs presented average particle sizes of 617.84 ± 6.38 nm, encapsulation efficiency of 70.05 ± 1.78% and loading capacity of 13.41 ± 0.18%. Fourier-transform infrared spectroscopy confirmed that CAP-IRSNPs might be formed by hydrogen-bonding action. Differential scanning calorimetry and X-ray diffraction showed that IRSNPs influenced the crystallization and melting temperatures of CAP. In in vitro release study, CAP-IRSNPs exhibited a sustained release. The CAP concentration, CAP diffusion from matrix and matrix erosion might be the potentially possible mechanisms for capsaicin release from CAP-IRSNPs. These new results concluded that IRSNPs may be a promising nanocarrier for CAP or other hydrophobic bioactive ingredients.
Keywords	Fourier transform infrared spectroscopy ; X-ray diffraction ; calorimetry ; capsaicin ; crystallization ; encapsulation ; food chemistry ; hydrogen bonding ; hydrophobicity ; microstructure ; nanocarriers ; nanoparticles ; rice starch ; Starch ; Starch nanoparticles ; Indica rice ; Adsorption ; Sustained release
Language	English
Dates of publication	2022-08
Publishing place	Elsevier Ltd
Document type	Article ; Online
ZDB-ID	243123-3
ISSN	1873-7072 ; 0308-8146
ISSN (online)	1873-7072
ISSN	0308-8146
DOI	10.1016/j.foodchem.2022.132692
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Article: A quadruple-label time-resolved fluorescence immunochromatographic assay for simultaneous quantitative determination of three mycotoxins in grains

Chang, Xiaoxi / Liu, Hebing / Tao, Xiaoqi / Zhang, Yaqing

Analytical methods. 2020 Jan. 23, v. 12, no. 3

2020

Abstract: A multiplex quadruple-label time-resolved fluorescence immunochromatographic assay (QL-TRFICA) for simultaneous quantitative detection of aflatoxin B1 (AFB1), zearalenone (ZEN) and ochratoxin A (OTA) in grains was established in this paper. This assay ... ...

Abstract	A multiplex quadruple-label time-resolved fluorescence immunochromatographic assay (QL-TRFICA) for simultaneous quantitative detection of aflatoxin B1 (AFB1), zearalenone (ZEN) and ochratoxin A (OTA) in grains was established in this paper. This assay was developed based on quadruple-label immunoprobes, one of which was a chicken IgY-specific antibody coupled with time-resolved fluorescent nanobeads (TRFN) for the test C line signal while the other three were specific to AFB1, ZEN and OTA monoclonal antibodies coupled with TRFN for the test T line signal. Quantitative relationships between the concentrations of the three mycotoxins and T/C ratios were established to determine the analyte concentration through a portable multi-channel fluorescence reader. The limits of detection (LODs) for AFB1, ZEN and OTA were 0.04 μg kg−1, 0.20 μg kg−1 and 0.10 μg kg−1 in 6 grains (corn, soybean, sorghum, wheat, rice and oats), respectively. Recoveries ranged from 71.60% to 119.98% at fortified concentrations of LOD, 2LOD and 4LOD, with a coefficient of variation <15%. Analysis of field grain samples by QL-TRFICA was in accordance with that of LC-MS/MS. Therefore, this proposed multiplex QL-TRFICA was a promising method for on-site screening of multiple mycotoxins in grains.
Keywords	aflatoxin B1 ; chickens ; corn ; detection limit ; fluorescence ; immunoaffinity chromatography ; mass spectrometry ; monoclonal antibodies ; nanoparticles ; oats ; ochratoxin A ; quantitative analysis ; rice ; screening ; soybeans ; wheat ; zearalenone
Language	English
Dates of publication	2020-0123
Size	p. 247-254.
Publishing place	The Royal Society of Chemistry
Document type	Article
ZDB-ID	2515210-5
ISSN	1759-9679 ; 1759-9660
ISSN (online)	1759-9679
ISSN	1759-9660
DOI	10.1039/c9ay02309g
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Article: Conjugation of antibodies and aptamers on nanozymes for developing biosensors

Tao, Xiaoqi / Wang, Xin / Liu, Biwu / Liu, Juewen

Biosensors & bioelectronics. 2020 Nov. 15, v. 168

2020

Abstract: Nanozymes are engineered nanomaterials with enzyme-like activities. Over the past decade, impressive progresses on nanozymes in biosensing have been made due to their unique advantages of high stability, low cost, and easy modification compared to ... ...

Abstract	Nanozymes are engineered nanomaterials with enzyme-like activities. Over the past decade, impressive progresses on nanozymes in biosensing have been made due to their unique advantages of high stability, low cost, and easy modification compared to natural enzymes. For many biosensors, it is critical to conjugate nanozymes to affinity ligands such as antibodies and aptamers. Since different nanomaterials have different surface properties, conjugation methods need to be compatible with these properties. In addition, the effect of biomolecules on nanozyme activity needs to be considered. In this review, we first categorized nanozyme-based biosensors into four parts, respectively describing noncovalent and covalent modifications with antibodies and aptamers. Meanwhile, recent advances in antibody and aptamer labeled nanozyme biosensors are summarized, and the methods of their conjugation are further illustrated. Finally, conclusions and future perspectives for the development and application of nanozyme bioconjugates are discussed.
Keywords	antibodies ; biosensors ; enzymes ; ligands ; nanomaterials ; oligonucleotides
Language	English
Dates of publication	2020-1115
Publishing place	Elsevier B.V.
Document type	Article
ZDB-ID	1011023-9
ISSN	1873-4235 ; 0956-5663
ISSN (online)	1873-4235
ISSN	0956-5663
DOI	10.1016/j.bios.2020.112537
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Article ; Online: Comparative Study of Time-Resolved Fluorescent Nanobeads, Quantum Dot Nanobeads and Quantum Dots as Labels in Fluorescence Immunochromatography for Detection of Aflatoxin B

Wang, Xin / Wu, Xuan / Lu, Zhisong / Tao, Xiaoqi

Biomolecules

2020 Volume 10, Issue 4

Abstract: Label selection is an essential procedure for improving the sensitivity of fluorescence immunochromatography assays (FICAs). Under optimum conditions, time-resolved fluorescent nanobeads (TRFN), quantum dots nanobeads (QB) and quantum dots (QD)-based ... ...

Abstract	Label selection is an essential procedure for improving the sensitivity of fluorescence immunochromatography assays (FICAs). Under optimum conditions, time-resolved fluorescent nanobeads (TRFN), quantum dots nanobeads (QB) and quantum dots (QD)-based immunochromatography assays (TRFN-FICA, QB-FICA and QD-FICA) were systematically and comprehensively compared for the quantitative detection of aflatoxin B
MeSH term(s)	Aflatoxin B1/analysis ; Calibration ; Chromatography, Affinity/methods ; Chromatography, Liquid ; Fluorescence ; Fluorescent Dyes/chemistry ; Nanoparticles/chemistry ; Nanoparticles/ultrastructure ; Quantum Dots/chemistry ; Reproducibility of Results ; Seeds/chemistry ; Tandem Mass Spectrometry ; Time Factors
Chemical Substances	Fluorescent Dyes ; Aflatoxin B1 (9N2N2Y55MH)
Language	English
Publishing date	2020-04-09
Publishing country	Switzerland
Document type	Comparative Study ; Journal Article ; Research Support, Non-U.S. Gov't
ZDB-ID	2701262-1
ISSN	2218-273X ; 2218-273X
ISSN (online)	2218-273X
ISSN	2218-273X
DOI	10.3390/biom10040575
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Article ; Online: Nanomaterial-based fluorescent biosensors for veterinary drug detection in foods.

Tao, Xiaoqi / Peng, Yuanyuan / Liu, Juewen

Journal of food and drug analysis

2020 Volume 28, Issue 4, Page(s) 575–594

Abstract: Veterinary drugs have been widely used in the food industry. Their residues in food products need to be tightly regulated to ensure food safety. In particular, some veterinary drugs are still used illegally, although they have already been banned. ... ...

Abstract	Veterinary drugs have been widely used in the food industry. Their residues in food products need to be tightly regulated to ensure food safety. In particular, some veterinary drugs are still used illegally, although they have already been banned. Nanomaterials are playing an increasingly important role in analytical chemistry due to their unique properties. Compared to traditional organic dyes and colloidal gold nanoparticle labels, fluorescent nanomaterials appear particularly attractive for the detection of veterinary drug residues. This review summarizes recent advancements of fluorescent biosensors using nanomaterials for the detection of veterinary drug residues in foods. The useful properties of each type of fluorescent nanomaterial are first discussed such as large Stokes shifts, long emission lifetime, and high quantum yields, which are useful for detection in food-related sample matrix. The following target recognition molecules are then reviewed individually including antibodies, aptamers, molecularly imprinted polymers, and metal ion coordination based ligands. Representative bioconjugation and assay methods are discussed for each recognition mechanism. Finally, a few future research directions are outlined in the last section of this review.
Language	English
Publishing date	2020-12-15
Publishing country	China (Republic : 1949- )
Document type	Journal Article ; Review
ISSN	2224-6614
ISSN (online)	2224-6614
DOI	10.38212/2224-6614.1267
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