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Xuan Z, Shen W, Liu H, Ni B, Lian Z, Li L, Chen J, Guo B, Wang S, Ye J. One-pot green synthesis of ZIF-8/IgG composite for the precise orientation and protection of antibody and its application in purification and detection of aflatoxins in peanut oil. Food Chem 2024; 449:139272. [PMID: 38604030 DOI: 10.1016/j.foodchem.2024.139272] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2023] [Revised: 02/29/2024] [Accepted: 04/04/2024] [Indexed: 04/13/2024]
Abstract
This study presents a novel approach toward the one-pot green synthesis of ZIF-8/IgG composite, focusing on its precise orientation and protection of the anti-aflatoxins antibody. The antibody orientation is achieved through the specific binding of IgG to the Fc region of the antibody, while the antibody protection is accomplished by the structural change restriction of ZIF-8 framework to the antibody. Consequently, the antibody exhibits enhanced target capability and significantly improved tolerance to organic solvents. The ZIF-8/IgG/anti-AFT was employed for the purification and detection of AFTs by coupling with UPLC. Under optimized conditions, the recoveries of spiked AFTs in peanut oils are between 86.1% and 106.4%, with relative standard deviations (RSDs) ranging from 0.8% to 8.8%. The linearity range is 0.5-20.0 ng for AFB1 and AFG1, 0.125-5.0 ng for AFB2 and AFG2, the limit of detection is 0.1 ng for AFB1 and AFG1, 0.03 ng for AFB2 and AFG2.
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Affiliation(s)
- Zhihong Xuan
- Academy of National Food and Strategic Reserves Administration, No.11 Baiwanzhuang Street, Xicheng District, Beijing 100037, China
| | - Wenjie Shen
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai, People's Republic of China
| | - Hongmei Liu
- Academy of National Food and Strategic Reserves Administration, No.11 Baiwanzhuang Street, Xicheng District, Beijing 100037, China
| | - Baoxia Ni
- Academy of National Food and Strategic Reserves Administration, No.11 Baiwanzhuang Street, Xicheng District, Beijing 100037, China
| | - Ziye Lian
- Beijing City University, No.6 Queen's Store Village, Haidian District, Beijing 100094, China
| | - Li Li
- Academy of National Food and Strategic Reserves Administration, No.11 Baiwanzhuang Street, Xicheng District, Beijing 100037, China
| | - Jinnan Chen
- Academy of National Food and Strategic Reserves Administration, No.11 Baiwanzhuang Street, Xicheng District, Beijing 100037, China
| | - Baoyuan Guo
- Academy of National Food and Strategic Reserves Administration, No.11 Baiwanzhuang Street, Xicheng District, Beijing 100037, China
| | - Songxue Wang
- Academy of National Food and Strategic Reserves Administration, No.11 Baiwanzhuang Street, Xicheng District, Beijing 100037, China
| | - Jin Ye
- Academy of National Food and Strategic Reserves Administration, No.11 Baiwanzhuang Street, Xicheng District, Beijing 100037, China; College of Information Science and Engineering, Henan University of Technology, Zhengzhou 450001, China.
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2
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Ni B, Ye J, Xuan Z, Li L, Wen X, Li Z, Liu H, Wang S. Automatic Pretreatment of Dispersive Liquid Liquid Microextraction Based on Immunomagnetic Beads Coupled with UPLC-FLD for the Determination of Zearalenone in Corn Oils. Toxins (Basel) 2023; 15:toxins15050337. [PMID: 37235371 DOI: 10.3390/toxins15050337] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 05/09/2023] [Accepted: 05/11/2023] [Indexed: 05/28/2023] Open
Abstract
Sample pretreatment is a vital step in the detection of mycotoxins, and traditional pretreatment methods are time-consuming, labor-intensive and generate much organic waste liquid. In this work, an automatic, high-throughput and environmentally friendly pretreatment method is proposed. Immunomagnetic beads technology and dispersive liquid-liquid microextraction technology are combined, and the zearalenone in corn oils is directly purified and concentrated under the solubilization effects of surfactant. The proposed pretreatment method allows for the batch pretreatment of samples without pre-extraction using organic reagents, and almost no organic waste liquid is produced. Coupled with UPLC-FLD, an effective and accurate quantitative detection method for zearalenone is established. The recovery of spiked zearalenone in corn oils at different concentrations ranges from 85.7 to 89.0%, and the relative standard deviation is below 2.9%. The proposed pretreatment method overcomes the shortcomings of traditional pretreatment methods and has broad application prospects.
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Affiliation(s)
- Baoxia Ni
- Academy of National Food and Strategic Reserves Administration, No. 11 Baiwanzhuang Street, Beijing 100037, China
| | - Jin Ye
- Academy of National Food and Strategic Reserves Administration, No. 11 Baiwanzhuang Street, Beijing 100037, China
| | - Zhihong Xuan
- Academy of National Food and Strategic Reserves Administration, No. 11 Baiwanzhuang Street, Beijing 100037, China
| | - Li Li
- Academy of National Food and Strategic Reserves Administration, No. 11 Baiwanzhuang Street, Beijing 100037, China
| | - Xiangrui Wen
- Academy of National Food and Strategic Reserves Administration, No. 11 Baiwanzhuang Street, Beijing 100037, China
- College of Food Science and Engineering, Central South University of Forestry and Technology, Changsha 410004, China
| | - Zongwang Li
- Academy of National Food and Strategic Reserves Administration, No. 11 Baiwanzhuang Street, Beijing 100037, China
- School of Health Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China
| | - Hongmei Liu
- Academy of National Food and Strategic Reserves Administration, No. 11 Baiwanzhuang Street, Beijing 100037, China
| | - Songxue Wang
- Academy of National Food and Strategic Reserves Administration, No. 11 Baiwanzhuang Street, Beijing 100037, China
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Chen J, Ye J, Li L, Wu Y, Liu H, Xuan Z, Chen M, Wang S. One-step automatic sample pretreatment for rapid, simple, sensitive, and efficient determination of aflatoxin M1 in milk by immunomagnetic beads coupled to liquid chromatography-tandem mass spectrometry. Food Control 2022. [DOI: 10.1016/j.foodcont.2022.108927] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Ye J, Zheng M, Ma H, Xuan Z, Tian W, Liu H, Wang S, Zhang Y. Development and Validation of an Automated Magneto-Controlled Pretreatment for Chromatography-Free Detection of Aflatoxin B1 in Cereals and Oils through Atomic Absorption Spectroscopy. Toxins (Basel) 2022; 14:toxins14070454. [PMID: 35878192 PMCID: PMC9319898 DOI: 10.3390/toxins14070454] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Revised: 06/28/2022] [Accepted: 06/29/2022] [Indexed: 12/18/2022] Open
Abstract
A chromatography-free detection of aflatoxin B1 (AFB1) in cereals and oils through atomic absorption spectroscopy (AAS) has been developed using quantum dots and immunomagnetic beads. A magneto-controlled pretreatment platform for automatic purification, labeling, and digestion was constructed, and AFB1 detection through AAS was enabled. Under optimal conditions, this immunoassay exhibited high sensitivity for AFB1 detection, with limits of detection as low as 0.04 μg/kg and a linear dynamic range of 2.5–240 μg/kg. The recoveries for four different food matrices ranged from 92.6% to 108.7%, with intra- and inter-day standard deviations of 0.7–6.3% and 0.6–6.9%, respectively. The method was successfully applied to the detection of AFB1 in husked rice, maize, and polished rice samples, and the detection results were not significantly different from those of liquid chromatography-tandem mass spectrometry. The proposed method realized the detection of mycotoxins through AAS for the first time. It provides a new route for AFB1 detection, expands the application scope of AAS, and provides a reference for the simultaneous determination of multiple poisonous compounds (such as mycotoxins and heavy metals).
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Affiliation(s)
- Jin Ye
- Key Laboratory of Grain Information Processing and Control, Henan University of Technology, Ministry of Education, Zhengzhou 450001, China;
- Henan Key Laboratory of Grain Photoelectric Detection and Control, Henan University of Technology, Zhengzhou 450001, China
- College of Information Science and Engineering, Henan University of Technology, Zhengzhou 450001, China
- Academy of National Food and Strategic Reserves Administration, Beijing 102600, China; (M.Z.); (Z.X.); (W.T.); (H.L.); (S.W.)
| | - Mengyao Zheng
- Academy of National Food and Strategic Reserves Administration, Beijing 102600, China; (M.Z.); (Z.X.); (W.T.); (H.L.); (S.W.)
- College of Food Science and Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Haihua Ma
- Key Laboratory of Grain Information Processing and Control, Henan University of Technology, Ministry of Education, Zhengzhou 450001, China;
- Henan Key Laboratory of Grain Photoelectric Detection and Control, Henan University of Technology, Zhengzhou 450001, China
- College of Information Science and Engineering, Henan University of Technology, Zhengzhou 450001, China
- Correspondence: (H.M.); (Y.Z.)
| | - Zhihong Xuan
- Academy of National Food and Strategic Reserves Administration, Beijing 102600, China; (M.Z.); (Z.X.); (W.T.); (H.L.); (S.W.)
| | - Wei Tian
- Academy of National Food and Strategic Reserves Administration, Beijing 102600, China; (M.Z.); (Z.X.); (W.T.); (H.L.); (S.W.)
| | - Hongmei Liu
- Academy of National Food and Strategic Reserves Administration, Beijing 102600, China; (M.Z.); (Z.X.); (W.T.); (H.L.); (S.W.)
| | - Songxue Wang
- Academy of National Food and Strategic Reserves Administration, Beijing 102600, China; (M.Z.); (Z.X.); (W.T.); (H.L.); (S.W.)
- College of Food Science and Engineering, Henan University of Technology, Zhengzhou 450001, China
| | - Yuan Zhang
- Key Laboratory of Grain Information Processing and Control, Henan University of Technology, Ministry of Education, Zhengzhou 450001, China;
- Henan Key Laboratory of Grain Photoelectric Detection and Control, Henan University of Technology, Zhengzhou 450001, China
- College of Information Science and Engineering, Henan University of Technology, Zhengzhou 450001, China
- Correspondence: (H.M.); (Y.Z.)
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Xuan Z, Wu Y, Liu H, Li L, Ye J, Wang S. Copper Oxide Nanoparticle-Based Immunosensor for Zearalenone Analysis by Combining Automated Sample Pre-Processing and High-Throughput Terminal Detection. Sensors (Basel) 2021; 21:s21196538. [PMID: 34640857 PMCID: PMC8512712 DOI: 10.3390/s21196538] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 09/24/2021] [Accepted: 09/27/2021] [Indexed: 12/17/2022]
Abstract
A rapid and high-throughput fluorescence detection method for zearalenone (ZEN) based on a CuO nanoparticle (NP)-assisted signal amplification immunosensor was developed using an automated sample pretreatment and signal conversion system. CuO NPs with high stability and biocompatibility were used as carriers to immobilize anti-ZEN antibodies. The obtained CuO NP-anti-ZEN can maintain the ability to recognize target toxins and act as both a signal source and carrier to achieve signal conversion using automated equipment. In this process, target toxin detection is indirectly transformed to Cu2+ detection because of the large number of Cu2+ ions released from CuO NPs under acidic conditions. Finally, a simple and high-throughput fluorescence assay based on a fluorescent tripeptide molecule was employed to detect Cu2+, using a multifunctional microporous plate detector. A good linear relationship was observed between the fluorescence signal and the logarithm of ZEN concentration in the range of 16.0–1600.0 μg/kg. Additionally, excellent accuracy with a high recovery yield of 99.2–104.9% was obtained, which was concordant with the results obtained from LC-MS/MS of naturally contaminated samples. The CuO NP-based assay is a powerful and efficient screening tool for ZEN detection and can easily be modified to detect other mycotoxins.
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Affiliation(s)
| | | | | | | | - Jin Ye
- Correspondence: (J.Y.); (S.W.); Tel.: +86-010-5645-2662 (J.Y.); +86-010-5645-2668 (S.W.)
| | - Songxue Wang
- Correspondence: (J.Y.); (S.W.); Tel.: +86-010-5645-2662 (J.Y.); +86-010-5645-2668 (S.W.)
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Wu Y, Ye J, Xuan Z, Li L, Wang H, Wang S, Liu H, Wang S. Development and validation of a rapid and efficient method for simultaneous determination of mycotoxins in coix seed using one-step extraction and UHPLC-HRMS. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2020; 38:148-159. [PMID: 33166220 DOI: 10.1080/19440049.2020.1833089] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Coix seed is an important food and traditional Chinese medicine in China and other Asian countries. Notably, coix seed is currently being used as a traditional medicine for the treatment of COVID-19 in China. However, coix seeds are generally contaminated by mycotoxins, and this risk cannot be ignored. In this paper, we developed a method that involves direct extraction and UHPLC-HRMS analysis for the simultaneous detection of 24 mycotoxins in coix seeds. UHPLC-HRMS instrument and data acquisition parameters, and the sample pretreatment were optimised. One-step extraction showed several advantages compared to the three commercial solid-phase extraction clean-up methods, including ease of use, reduced time of sample preparation, low cost, good recovery, and acceptable matrix effect. The method validation results indicate that all mycotoxins have good linearity and sensitivity. Recoveries were between 74.2-101.1%, and RSD ranged from 0.1-5.8%. The LOQs for 24 mycotoxins were in the range of 0.5-100 µg/kg. To survey the contamination levels of these mycotoxins in commercial coix seeds, more than 70 samples were collected from Chinese markets and were analysed using the newly developed method. Zearalenone (positive ratio: 98.7%, range:1.1-1562 µg/kg), deoxynivalenol (positive ratio: 87%, range: 8.4-382.5 µg/kg), nivalenol (positive ratio: 85.7%, range: 26.8-828.2 µg/kg), fumonisin B1 (positive ratio: 84.4%, range:2.5-314.5 µg/kg), fumonisin B2 (positive ratio: 75.3%, range:1.6-72.8 µg/kg), fumonisin B3 (positive ratio: 48%, range:1.0-203.6 µg/kg), aflatoxin B1 (positive ratio: 29.9%, range: 0.39-14.7 µg/kg), sterigmatocystin (positive ratio: 29.9%, range: 1.4-51.6 µg/kg), and tenuazonic acid (positive ratio: 19.5%, range 36.1-105.7 µg/kg) were the most frequent mycotoxin contaminants. These results highlight the importance of routine monitoring and control of mycotoxins in coix seeds.
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Affiliation(s)
- Yu Wu
- Academy of National Food and Strategic Reserves Administration, Institute of Grain and Oil Quality and Safety , Beijing, China
| | - Jin Ye
- Academy of National Food and Strategic Reserves Administration, Institute of Grain and Oil Quality and Safety , Beijing, China
| | - Zhihong Xuan
- Academy of National Food and Strategic Reserves Administration, Institute of Grain and Oil Quality and Safety , Beijing, China
| | - Li Li
- Academy of National Food and Strategic Reserves Administration, Institute of Grain and Oil Quality and Safety , Beijing, China
| | - Haibo Wang
- Guangxi-ASEAN Food Inspection and Testing Center , Nanning, China
| | - Songshan Wang
- Academy of National Food and Strategic Reserves Administration, Institute of Grain and Oil Quality and Safety , Beijing, China
| | - Hongmei Liu
- Academy of National Food and Strategic Reserves Administration, Institute of Grain and Oil Quality and Safety , Beijing, China
| | - Songxue Wang
- Academy of National Food and Strategic Reserves Administration, Institute of Grain and Oil Quality and Safety , Beijing, China
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7
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Xuan Z, Liu H, Ye J, Li L, Tian W, Wang S. Reliable and disposable quantum dot-based electrochemical immunosensor for aflatoxin B 1 simplified analysis with automated magneto-controlled pretreatment system. Anal Bioanal Chem 2020; 412:7615-7625. [PMID: 32856110 DOI: 10.1007/s00216-020-02897-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2020] [Revised: 08/05/2020] [Accepted: 08/18/2020] [Indexed: 01/11/2023]
Abstract
An integrated aflatoxin B1 (AFB1) detection platform with quantum dot (QD)-based electrochemical immunosensor and an automated magneto-controlled pretreatment system was successfully developed. The automated pretreatment system adopts the immunoaffinity magnetic beads (IMB) as the capture probe of AFB1 and QD-labeled AFB1 complete antigen (AFB1-BSA-QDs) as the signal probe. AFB1-BSA-QDs can be easily converted into corresponding metallic cations through acidic treatment, which can be detected electrochemically via anode stripping voltammetry (ASV). Moreover, a disposable screen-printed electrode (SPE) without requiring any further modification is used in the novel electrochemical immunosensor' making routine testing feasible. Under optimal conditions, the detectable concentration range of AFB1 was 0.08-800 μg/kg. The metal ion signal associated linearly with the logarithm of AFB1 concentration within the range of 5-240 μg/kg, with a detection limit of 0.05 μg/kg. The spiked recoveries of three different concentrations in four different matrixes ranged from 83.9 to 118.0%, and inter-day relative standard deviations were below 10%. Furthermore, the methodology was validated by analyzing naturally contaminated samples, and results of the novel immunosensor were in good agreement with those of LC-MS/MS, demonstrating the potentiality of the developed method for the monitor of AFB1 in cereals and oils.
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Affiliation(s)
- Zhihong Xuan
- Academy of National Food and Strategic Reserves Administration, No.11 Baiwanzhuang Str, Xicheng District, Beijing, 100037, China
| | - Hongmei Liu
- Academy of National Food and Strategic Reserves Administration, No.11 Baiwanzhuang Str, Xicheng District, Beijing, 100037, China
| | - Jin Ye
- Academy of National Food and Strategic Reserves Administration, No.11 Baiwanzhuang Str, Xicheng District, Beijing, 100037, China.
| | - Li Li
- Academy of National Food and Strategic Reserves Administration, No.11 Baiwanzhuang Str, Xicheng District, Beijing, 100037, China
| | - Wei Tian
- Academy of National Food and Strategic Reserves Administration, No.11 Baiwanzhuang Str, Xicheng District, Beijing, 100037, China
| | - Songxue Wang
- Academy of National Food and Strategic Reserves Administration, No.11 Baiwanzhuang Str, Xicheng District, Beijing, 100037, China.
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Ye J, Xuan Z, Zhang B, Wu Y, Li L, Wang S, Xie G, Wang S. Automated analysis of ochratoxin A in cereals and oil by immunoaffinity magnetic beads coupled to UPLC-FLD. Food Control 2019. [DOI: 10.1016/j.foodcont.2018.11.006] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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9
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Niu C, Bao Y, Zhuang C, Li S, Wang T, Zhang X, Ma Y, Xuan Z, Gu L, Lan N, Xie Q. Effectiveness of short-term training with a synergy-based FES paradigm on motor function recovery post-stroke. Ann Phys Rehabil Med 2018. [DOI: 10.1016/j.rehab.2018.05.072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Xiong Y, Li M, Liu H, Xuan Z, Yang J, Liu D. Janus PEGylated gold nanoparticles: a robust colorimetric probe for sensing nitrite ions in complex samples. Nanoscale 2017; 9:1811-1815. [PMID: 28102403 DOI: 10.1039/c6nr07879f] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
We presented a Janus PEGylated AuNP probe where PEGs and recognition ligands (e.g., 4-aminobenzenethiol, 4-ABT) were asymmetrically functionalized on an AuNP. With this design, the probes showed high colloidal stability, signal robustness, specificity, and sufficient sensitivity in the determination of NO2- in various complex samples.
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Affiliation(s)
- Yanmei Xiong
- State Key Laboratory of Medicinal Chemical Biology, Research Center for Analytical Sciences, and Tianjin Key Laboratory of Molecular Recognition and Biosensing, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Mingmin Li
- State Key Laboratory of Medicinal Chemical Biology, Research Center for Analytical Sciences, and Tianjin Key Laboratory of Molecular Recognition and Biosensing, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Huiqiao Liu
- State Key Laboratory of Medicinal Chemical Biology, Research Center for Analytical Sciences, and Tianjin Key Laboratory of Molecular Recognition and Biosensing, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Zhihong Xuan
- State Key Laboratory of Medicinal Chemical Biology, Research Center for Analytical Sciences, and Tianjin Key Laboratory of Molecular Recognition and Biosensing, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Jie Yang
- State Key Laboratory of Medicinal Chemical Biology, Research Center for Analytical Sciences, and Tianjin Key Laboratory of Molecular Recognition and Biosensing, College of Chemistry, Nankai University, Tianjin 300071, China.
| | - Dingbin Liu
- State Key Laboratory of Medicinal Chemical Biology, Research Center for Analytical Sciences, and Tianjin Key Laboratory of Molecular Recognition and Biosensing, College of Chemistry, Nankai University, Tianjin 300071, China. and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China
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Abstract
Herein, we demonstrate a plasmonic ELISA based on the alkaline phosphatase (ALP)-mediated growth of silver nanoparticles (AgNPs) for the sensitive, rapid, and naked-eye detection of cancer biomarkers in clinical serum samples. This approach was used to measure the low-abundance alpha fetal protein (AFP) in clinical sera, which demonstrates its great capability in the differentiation of cancers and evaluation of therapeutic responses. Impressively, the readout of the plasmonic assay depends on the rapid formation of Ag colloidal solutions with various degrees of yellow color, which can be distinguished by the naked eye, without the need for sophisticated platforms. The limit of detection of the plasmonic ELISA for alpha fetal protein (AFP) can be as low as 0.23 ng mL-1, which is approximately 10 folds lower than that of conventional ELISA. This plasmonic ELISA opens a new avenue for the early detection of cancers and monitoring of cancer reoccurrence especially in resource-poor regions where convenient diagnostic tools are highly desirable.
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Affiliation(s)
- Zhihong Xuan
- College of Chemistry, Research Center for Analytical Sciences, State Key Laboratory of Medicinal Chemical Biology, and Tianjin Key Laboratory of Molecular Recognition and Biosensing, Nankai University, Tianjin 300071, China.
| | - Mingmin Li
- College of Chemistry, Research Center for Analytical Sciences, State Key Laboratory of Medicinal Chemical Biology, and Tianjin Key Laboratory of Molecular Recognition and Biosensing, Nankai University, Tianjin 300071, China.
| | - Pengfei Rong
- Department of Radiology, The Third Xiangya Hospital, Central South University, Changsha, Hunan 410013, China.
| | - Wei Wang
- Department of Radiology, The Third Xiangya Hospital, Central South University, Changsha, Hunan 410013, China.
| | - Yijun Li
- College of Chemistry, Research Center for Analytical Sciences, State Key Laboratory of Medicinal Chemical Biology, and Tianjin Key Laboratory of Molecular Recognition and Biosensing, Nankai University, Tianjin 300071, China.
| | - Dingbin Liu
- College of Chemistry, Research Center for Analytical Sciences, State Key Laboratory of Medicinal Chemical Biology, and Tianjin Key Laboratory of Molecular Recognition and Biosensing, Nankai University, Tianjin 300071, China. and Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin 300071, China
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12
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Ellegood J, Anagnostou E, Babineau BA, Crawley JN, Lin L, Genestine M, DiCicco-Bloom E, Lai JKY, Foster JA, Peñagarikano O, Geschwind DH, Pacey LK, Hampson DR, Laliberté CL, Mills AA, Tam E, Osborne LR, Kouser M, Espinosa-Becerra F, Xuan Z, Powell CM, Raznahan A, Robins DM, Nakai N, Nakatani J, Takumi T, van Eede MC, Kerr TM, Muller C, Blakely RD, Veenstra-VanderWeele J, Henkelman RM, Lerch JP. 3D visualization of the regional differences. Mol Psychiatry 2015; 20:1. [PMID: 25648202 PMCID: PMC5131793 DOI: 10.1038/mp.2014.168] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- J Ellegood
- Mouse Imaging Centre, Hospital for Sick Children, Toronto, Ontario, Canada
| | - E Anagnostou
- Holland Bloorview Kids Rehabilitation Hospital, Toronto, Ontario, Canada
| | - BA Babineau
- National Institute of Mental Health, Bethesda, MD, USA
| | - JN Crawley
- National Institute of Mental Health, Bethesda, MD, USA,MIND Institute, University of California Davis School of Medicine, Sacramento, CA, USA
| | - L Lin
- UMDNJ - Robert Wood Johnson Medical School, Piscataway, NJ, USA
| | - M Genestine
- UMDNJ - Robert Wood Johnson Medical School, Piscataway, NJ, USA
| | - E DiCicco-Bloom
- UMDNJ - Robert Wood Johnson Medical School, Piscataway, NJ, USA
| | - JKY Lai
- The Brain-Body Institute, McMaster University, Hamilton, Ontario, Canada
| | - JA Foster
- The Brain-Body Institute, McMaster University, Hamilton, Ontario, Canada
| | - O Peñagarikano
- Semel Institute for Neuroscience and Human Behavior, David Geffen School of Medicine, UCLA, Los Angeles, CA, USA
| | - DH Geschwind
- Semel Institute for Neuroscience and Human Behavior, David Geffen School of Medicine, UCLA, Los Angeles, CA, USA
| | - LK Pacey
- Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, Ontario, Canada
| | - DR Hampson
- Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, Ontario, Canada
| | - CL Laliberté
- Mouse Imaging Centre, Hospital for Sick Children, Toronto, Ontario, Canada
| | - AA Mills
- Cold Spring Harbor Laboratory, Cold Spring Harbor, NY, USA
| | - E Tam
- Departments of Medicine and Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
| | - LR Osborne
- Departments of Medicine and Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
| | - M Kouser
- University of Texas Southwestern Medical Center, Dallas, TX, USA
| | | | - Z Xuan
- University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - CM Powell
- University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - A Raznahan
- National Institutes of Health, Bethesda, MD, USA
| | - DM Robins
- Department of Human Genetics, University of Michigan Medical School, Ann Arbor, MI, USA
| | - N Nakai
- RIKEN Brain Science Institute, Wako, Japan
| | - J Nakatani
- RIKEN Brain Science Institute, Wako, Japan
| | - T Takumi
- RIKEN Brain Science Institute, Wako, Japan
| | - MC van Eede
- Mouse Imaging Centre, Hospital for Sick Children, Toronto, Ontario, Canada
| | - TM Kerr
- Vanderbilt Kennedy Center, Vanderbilt Brain Institute, Nashville, TN, USA
| | - C Muller
- Vanderbilt Kennedy Center, Vanderbilt Brain Institute, Nashville, TN, USA
| | - RD Blakely
- Vanderbilt Kennedy Center, Vanderbilt Brain Institute, Nashville, TN, USA
| | | | - RM Henkelman
- Mouse Imaging Centre, Hospital for Sick Children, Toronto, Ontario, Canada,Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada
| | - JP Lerch
- Mouse Imaging Centre, Hospital for Sick Children, Toronto, Ontario, Canada,Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada
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13
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Abstract
Previous molecular phylogeny algorithms mainly rely onmulti-sequence alignments of cautiously selected characteristic sequences,thus not directly appropriate for whole genome phylogeny where eventssuch as rearrangements make full-length alignments impossible. Weintroduce here the concept of Complete Information Set (CIS) and itsmeasurement implementation as evolution distance without reference tosizes. As method proof-test, the 16s rRNA sequences of 22 completelysequenced Bacteria and Archaea species are used to reconstruct aphylogenetic tree, which is generally consistent with the commonlyaccepted one. Based on whole genome, our further efforts yield a highlyrobust whole genome phylogenetic tree, supporting separate monophyleticcluster of species with similar phenotype as well as the early evolution ofthermophilic Bacteria and late diverging of Eukarya. The purpose of thiswork is not to contradict or confirm previous phylogeny standards butrather to bring a brand-new algorithm and tool to the phylogeny researchcommunity. The software to estimate the sequence distance and materialsused in this study are available upon request to corresponding author.
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Affiliation(s)
- W Li
- Laboratory of Bioinformatics, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101 China
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14
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Albert FW, Hodges E, Jensen JD, Besnier F, Xuan Z, Rooks M, Bhattacharjee A, Brizuela L, Good JM, Green RE, Burbano HA, Plyusnina IZ, Trut L, Andersson L, Schöneberg T, Carlborg O, Hannon GJ, Pääbo S. Targeted resequencing of a genomic region influencing tameness and aggression reveals multiple signals of positive selection. Heredity (Edinb) 2011; 107:205-14. [PMID: 21304545 DOI: 10.1038/hdy.2011.4] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
The identification of the causative genetic variants in quantitative trait loci (QTL) influencing phenotypic traits is challenging, especially in crosses between outbred strains. We have previously identified several QTL influencing tameness and aggression in a cross between two lines of wild-derived, outbred rats (Rattus norvegicus) selected for their behavior towards humans. Here, we use targeted sequence capture and massively parallel sequencing of all genes in the strongest QTL in the founder animals of the cross. We identify many novel sequence variants, several of which are potentially functionally relevant. The QTL contains several regions where either the tame or the aggressive founders contain no sequence variation, and two regions where alternative haplotypes are fixed between the founders. A re-analysis of the QTL signal showed that the causative site is likely to be fixed among the tame founder animals, but that several causative alleles may segregate among the aggressive founder animals. Using a formal test for the detection of positive selection, we find 10 putative positively selected regions, some of which are close to genes known to influence behavior. Together, these results show that the QTL is probably not caused by a single selected site, but may instead represent the joint effects of several sites that were targets of polygenic selection.
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Affiliation(s)
- F W Albert
- Department of Evolutionary Genetics, Max Planck Institute for Evolutionary Anthropology, Leipzig, Germany.
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15
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Tao W, Zefei J, Xuan Z, Xiaobing L, Shaohua Z, Ge S, Min Z, Shikai W, Santai S. HER2 status testing by immunohistochemical and fFluorescence in situ hybridization in China. J Clin Oncol 2009. [DOI: 10.1200/jco.2009.27.15_suppl.e22233] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
e22233 Background: HER2 gene overexpression is associated with aggressive breast cancer and poor clinical prognosis. Humanized anti-HER2 monoclonal antibody trastuzumab, which is targeted HER2 protein has showed to improve overall survival in patients with HER2-positive breast cancer in both the metastatic and adjuvant settings. There are some differences in HER2 positive rate among difference reports in China. This study tested HER2 status by immunohistochemistry(IHC) and fluorescence in situ hybridization (FISH) and compared HER2 testing at central and regional laboratories in China. Methods: Assessment of HER2 status was performed by FISH using the HercepTeast kit at central laboratory and by IHC using commercial available anti-HER2 probe in formalin-fixed and paraffin-embedded tissue section of 280 breast cancer samples. IHC HER2 testing was performed on 149 samples in the central laboratory. IHC HER2 testing was performed on 80 samples at both central laboratory and regional laboratory. Results: 280 samples were tested 373 times testing by IHC and FISH. The results were showed in table 1 . 80 samples was tested by IHC at central and regional laboratory and testing results of 36.4% samples were accordant (K=0.038). 94.1% IHC3+ at central laboratory were HER2 FISH positive and 83.3% IHC 3+ at regional laboratory were HER2 FISH positive. 86.7% IHC 2+ at central laboratory were HER2 FISH positive and 62.7% IHC 2+ at regional laboratory were HER2 FISH positive. 17 samples were observed HER2 FISH positive in the 27 IHC 0/1+ tested at regional laboratoty. So good correlation was obsearved between FISH HER2 status and IHC results from central laboratory but not from regional laboratory. Conclusions: This study emphasized the important of accurate HER2 testing. HER2 FISH test should be performed for the IHC 2+ samples. Even HER2 FISH test maybe performed for IHC 0/1 sample according to clinical characteristics in China in order to make the patients have targeted therapy chance. [Table: see text] No significant financial relationships to disclose.
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Affiliation(s)
- W. Tao
- Cancer Center of Hospital Affiliated to Military Medical Science, Beijing, China; Cancer Center of Hospital Affiliated Military Medi, Beijing, China; Peking Union Medical College Hospital, Beijing, China
| | - J. Zefei
- Cancer Center of Hospital Affiliated to Military Medical Science, Beijing, China; Cancer Center of Hospital Affiliated Military Medi, Beijing, China; Peking Union Medical College Hospital, Beijing, China
| | - Z. Xuan
- Cancer Center of Hospital Affiliated to Military Medical Science, Beijing, China; Cancer Center of Hospital Affiliated Military Medi, Beijing, China; Peking Union Medical College Hospital, Beijing, China
| | - L. Xiaobing
- Cancer Center of Hospital Affiliated to Military Medical Science, Beijing, China; Cancer Center of Hospital Affiliated Military Medi, Beijing, China; Peking Union Medical College Hospital, Beijing, China
| | - Z. Shaohua
- Cancer Center of Hospital Affiliated to Military Medical Science, Beijing, China; Cancer Center of Hospital Affiliated Military Medi, Beijing, China; Peking Union Medical College Hospital, Beijing, China
| | - S. Ge
- Cancer Center of Hospital Affiliated to Military Medical Science, Beijing, China; Cancer Center of Hospital Affiliated Military Medi, Beijing, China; Peking Union Medical College Hospital, Beijing, China
| | - Z. Min
- Cancer Center of Hospital Affiliated to Military Medical Science, Beijing, China; Cancer Center of Hospital Affiliated Military Medi, Beijing, China; Peking Union Medical College Hospital, Beijing, China
| | - W. Shikai
- Cancer Center of Hospital Affiliated to Military Medical Science, Beijing, China; Cancer Center of Hospital Affiliated Military Medi, Beijing, China; Peking Union Medical College Hospital, Beijing, China
| | - S. Santai
- Cancer Center of Hospital Affiliated to Military Medical Science, Beijing, China; Cancer Center of Hospital Affiliated Military Medi, Beijing, China; Peking Union Medical College Hospital, Beijing, China
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16
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Abstract
Transcriptional factors (TFs) and many of their target genes are involved in gene regulation at the level of transcription. To decipher gene regulatory networks (GRNs) we require a comprehensive and accurate knowledge of transcriptional regulatory elements. TRED (http://rulai.cshl.edu/TRED) was designed as a resource for gene regulation and function studies. It collects mammalian cis- and trans-regulatory elements together with experimental evidence. All the regulatory elements were mapped on to the assembled genomes. In this new release, we included a total of 36 TF families involved in cancer. Accordingly, the number of target promoters and genes for TF families has increased dramatically. There are 11,660 target genes (7479 in human, 2691 in mouse and 1490 in rat) and 14,908 target promoters (10,225 in human, 2985 in mouse and 1698 in rat). Additionally, we constructed GRNs for each TF family by connecting the TF-target gene pairs. Such interaction data between TFs and their target genes will assist detailed functional studies and help to obtain a panoramic view of the GRNs for cancer research.
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Affiliation(s)
| | | | | | - M. Q. Zhang
- To whom correspondence should be addressed. Tel: +1 516 367 8393; Fax: +1 516 367 8461;
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17
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Lo WS, Lau CF, Xuan Z, Chan CF, Feng GY, He L, Cao ZC, Liu H, Luan QM, Xue H. Association of SNPs and haplotypes in GABAA receptor beta2 gene with schizophrenia. Mol Psychiatry 2004; 9:603-8. [PMID: 14699426 DOI: 10.1038/sj.mp.4001461] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Disturbances in GABAergic system have been observed in schizophrenics. In the present study, population association analysis was performed on 19 SNPs in the alpha(1), beta(2), gamma(2), epsilon and pi subunit genes of GABA(A) receptor. Five SNPs in GABRB2, namely B2I7G1584T, rs1816071, rs194072, rs252944 and rs187269, were found to be significantly associated, and their haplotypes in linkage disequilibrium, with schizophrenia. This represents the first report on any disease association of SNPs in the human GABA(A) receptor genes, and focuses attention on the GABAergic hypothesis of schizophrenia etiology.
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Affiliation(s)
- W-S Lo
- Department of Biochemistry and Applied Genomics Laboratory, The Hong Kong University of Science & Technology, Hong Kong, China
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18
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Abstract
A modified surgical method for penis lengthening was, for the first time, set up in this laboratory. The procedure involves covering the dissected corpus cavernosum with either a scrotal flap or a skin graft after releasing the superficial ligament and even some deep suspensory ligament. The advantage of the scrotal flap is emphasized to cover the wound, and a V-Y suture was made to avoid the traction. The results, both in appearance and increased length, were satisfactory in 52 cases. Among the 52 patients, 39 suffered from congenital short penis and 13 from traumatic injuries. The significance and the blood supply of the penis are discussed.
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Affiliation(s)
- L Shirong
- Department of Plastic and Aesthetic Surgery, Southwestern Hospital, Third Military Medical University, Chongqing, China.
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19
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Abstract
To improve the MCXO performance and simplify its structure, a new MCXO design method has been developed. Through deleting pulses of clock signal of a microcomputer and shifting its phase, the frequency-temperature stability of MCXO can be made satisfactory, and the DDS chip, which is often used in high performance MCXO, can be eliminated. Several different MCXOs have been made with this method and different performance specifications can be obtained. According to the simplicity, in a wide temperature range from -40 to +80 degrees C, the frequency-temperature stability of the MCXOs can be from +/-3x10(-8) to +/-2x10(-7).
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Affiliation(s)
- W Zhou
- Dept. of Meas. and Instrum., Xidian Univ., Xi'an
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20
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Miao Z, Liu S, Xuan Z, Zhao Q, Liu R. [Color television microscope with an automatic stage]. Zhongguo Yi Liao Qi Xie Za Zhi 1997; 21:276-278. [PMID: 11189276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
To mount a group of stepper motors on a television microscope automates the instrument in coarse focussing and equi-spaced moving a specimen. A microprocessor 8031 application system is used to control the stepper motors. For enhancing the properties and reliability of the system, we select RIF 530, a field effect transistor for the power amplifier of the motor. Combination PC with the instrument becomes basic hardware of a universal microscopic image processing system.
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