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Xu Z, Liu X, Zong C, Zhang Q, Gai H. Homogeneous immunoassay utilizing fluorescence resonance energy transfer from quantum dots to tyramide dyes deposited on full immunocomplexes. Analyst 2023; 148:4877-4884. [PMID: 37642356 DOI: 10.1039/d3an01174g] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/31/2023]
Abstract
There is an urgent need for homogeneous immunoassays that offer sufficient sensitivity for routine clinical practice. In this study, we have developed a highly sensitive, fluorescence resonance energy transfer (FRET)-based homogeneous immunoassay. Unlike previous FRET-based homogeneous immunoassays, where acceptors were attached to antibody molecules located far from the donor, we employed acceptors to label the entire sandwich-structured immunocomplex, including two antibodies and one antigen. As a result, the FRET signal was amplified by a factor of 10, owing to the reduced distance between the donor and acceptors. We validated our method by quantifying carcinoembryonic antigen (CEA) and α-fetoprotein (AFP) in PBS buffer and blank plasma. The limits of detection (LOD) for CEA and AFP in both PBS buffer and blank plasma were comparable, reaching sub-femtomolar levels. Furthermore, we successfully quantified CEA and AFP in three human plasma samples, thereby confirming the reliability of our method for clinical applications.
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Affiliation(s)
- Zihan Xu
- School of Chemistry and Materials Science, Jiangsu Normal University, Shanghai Road 101, Xuzhou, Jiangsu, China.
| | - Xiaojun Liu
- School of Chemistry and Materials Science, Jiangsu Normal University, Shanghai Road 101, Xuzhou, Jiangsu, China.
| | - Chenghua Zong
- School of Chemistry and Materials Science, Jiangsu Normal University, Shanghai Road 101, Xuzhou, Jiangsu, China.
| | - Qingquan Zhang
- School of Chemistry and Materials Science, Jiangsu Normal University, Shanghai Road 101, Xuzhou, Jiangsu, China.
| | - Hongwei Gai
- School of Chemistry and Materials Science, Jiangsu Normal University, Shanghai Road 101, Xuzhou, Jiangsu, China.
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2
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Ge M, Zhao W, Han Y, Gai H, Zong C. Corrigendum: Contactless and robust dielectric microspheres-assisted surface-enhanced Raman scattering sensitivity improvement for anthrax biomarker detection. Front Chem 2023; 11:1161985. [PMID: 36970410 PMCID: PMC10034367 DOI: 10.3389/fchem.2023.1161985] [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] [Received: 02/09/2023] [Accepted: 02/27/2023] [Indexed: 03/11/2023] Open
Abstract
[This corrects the article DOI: 10.3389/fchem.2022.1057241.].
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3
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Yu WK, Wang YC, Li YP, Gao Y, Zong C, Xu YM, Li YS. [The correlation between plasma heat shock proteins 90α levels and white matter hyperintensity in patients with cerebral small vessel disease]. Zhonghua Yi Xue Za Zhi 2022; 102:2602-2606. [PMID: 36058685 DOI: 10.3760/cma.j.cn112137-20211215-02795] [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: 06/15/2023]
Abstract
Objective: To investigate the relationship between plasma heat shock proteins 90α(Hsp90α) levels and the white matter hyperintensity(WMH) in patients with cerebral small vessel disease(SVD). Methods: Patients admitted to the Department of Neurology, the First Affiliated Hospital of Zhengzhou University from March to August 2021 and diagnosed with WMH by magnetic resonance examination (MRI) were selected as the case group, matched with physical examination patients who visited the Department of Medical Examination during the same period and showed no WMH on MRI and no history of neurological diseases as the control group, and the level of plasma Hsp90α was quantitatively detected by enzyme-linked immunosorbent assay. Mann-Whitney U test was used to compare whether there was a difference in plasma Hsp90α levels between the control group and the case group.Multivariate logistic regression analysis was used to explore the related factors of WMH in patients with SVD. Results: Of the 183 subjects, the control group (n=73) consisted of 28 males and 45 females, aged (54±10) years, while the case group (n=110) consisted of 71 males and 39 females, aged (64±10) years old. Plasma Hsp90α level was higher in the case group than that of the control group [53.33(35.33, 70.09) ng/ml vs 35.02(18.51, 54.95) ng/ml, P<0.001]. After adjusting for confounding factors by multivariate analysis, the results showed that plasma Hsp90α levels greater than 58.34 ng/ml was associated with WMH (P=0.002, OR=5.931, 95%CI:1.955-17.995). Conclusion: Higher level of plasma Hsp90α is associated with WMH in patients with SVD.
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Affiliation(s)
- W K Yu
- Department of Neurology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, China
| | - Y C Wang
- Department of Neurology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, China
| | - Y P Li
- Department of Neurology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, China
| | - Y Gao
- Department of Neurology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, China
| | - C Zong
- Department of Neurology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, China
| | - Y M Xu
- Department of Neurology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, China
| | - Y S Li
- Department of Neurology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou 450000, China
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4
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Ge M, Zhao W, Han Y, Gai H, Zong C. Contactless and robust dielectric microspheres-assisted surface-enhanced Raman scattering sensitivity improvement for anthrax biomarker detection. Front Chem 2022; 10:1057241. [PMID: 36458159 PMCID: PMC9705956 DOI: 10.3389/fchem.2022.1057241] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Accepted: 10/27/2022] [Indexed: 11/16/2022] Open
Abstract
This report presents a contactless and robust dielectric microspheres (DMs)-assisted surface enhanced Raman scattering (SERS) enhancement method to improve SERS detection sensitivity detection sensitivity. DMs that could focus and collect light were embedded within the polydimethylsiloxane (PDMS) film to avoid direct contact with the analytical solution and improve detection reliability. The as prepared DMs embedded PDMS DMs PD MS film was integrated with a microfluidic technique to enhance the SERS signal of a liquid substrate. Detection in microfluidic systems can reduce reagent consumption, shorten assay time, and avoid evaporation of the colloid substrate solution. The robustness and potential influencing factors of DMs PDMS film assisted SERS enhancement (DERS) were evaluated using 4-aminothiophenol (4-ATP) as the Raman probe. The sensing performance of the proposed method toward dipicolinic acid (DPA) was evaluated, and an evident signal intensification was obtained. Remarkably, the DMs PDMS film can also be implemented on solid substrates. A proof-of-concept experiment was performed by covering the DMs PDMS film directly over an AgNPs@Si solid substrate wherein a 5.7-fold sensitivity improvement was achieved.
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Wu J, Zong C, Shao T, Liang Y, McCann JC, Dong Z, Li J, Zhang J, Liu Q. Clarifying the relationships among bacteria, lipid-related enzymes, main polyunsaturated fatty acids and fat-soluble vitamins in alfalfa (Medicago sativa L.) silage using various sugar supplementations. Anim Feed Sci Technol 2021. [DOI: 10.1016/j.anifeedsci.2020.114799] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Chen Y, Zong C, Jia J, Liu Y, Zhang Z, Cai B, Tian L. A study on the protective effect of molecular hydrogen on osteoradionecrosis of the jaw in rats. Int J Oral Maxillofac Surg 2020; 49:1648-1654. [PMID: 32451233 DOI: 10.1016/j.ijom.2020.04.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2019] [Revised: 03/04/2020] [Accepted: 04/20/2020] [Indexed: 12/11/2022]
Abstract
The aim of this study was to investigate the protective effect of hydrogen in a rat model of osteoradionecrosis of the jaw (ORNJ). The rats and bone marrow-derived mesenchymal stem cells (BMSCs) were pre-treated with hydrogen before receiving irradiation (7Gy per fraction, five fractions in total once a day for rats, 4Gy for BMSCs). Reactive oxygen species (ROS) and cell differentiation were measured in the BMSCs. Also, the radioprotective effect of hydrogen for ORNJ in Sprague-Dawley rats was examined by gross clinical manifestations, micro-computed tomography, and histology. Hydrogen significantly reduced the production of ROS in BMSCs after irradiation. The cell viability was significantly decreased after irradiation (P= 0.001), but pre-treatment with hydrogen before irradiation increased the cell viability (P= 0.025). Hydrogen considerably increased the cellular differentiation potential of the irradiated cells. Comparing with the rats underwent irradiaton only, those rats treated by hydrogen-rich saline significantly appeared improved occlusion, salivation, alopecia, oral ulcer, and less bone necrosis. Myofibroblasts accumulated overwhelmingly in the fibrosis medulla and around the sequestrum after irradiation, and this was decreased in the group pre-treated with hydrogen. Hydrogen may represent a strategy for the prevention and treatment of ORNJ. Its high efficacy and low toxicity suggest possible therapeutic application.
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Affiliation(s)
- Y Chen
- State Key Laboratory of Military Stomatology and National Clinical Research Centre for Oral Diseases, and Department of Oral and Maxillofacial Surgery, School of Stomatology, the Fourth Military Medical University, Xi'an, China; State Key Laboratory of Military Stomatology and National Clinical Research Centre for Oral Diseases, School of Stomatology, the Fourth Military Medical University, Xi'an, China
| | - C Zong
- State Key Laboratory of Military Stomatology and National Clinical Research Centre for Oral Diseases, and Department of Oral and Maxillofacial Surgery, School of Stomatology, the Fourth Military Medical University, Xi'an, China; State Key Laboratory of Military Stomatology and National Clinical Research Centre for Oral Diseases, School of Stomatology, the Fourth Military Medical University, Xi'an, China
| | - J Jia
- State Key Laboratory of Military Stomatology and National Clinical Research Centre for Oral Diseases, School of Stomatology, the Fourth Military Medical University, Xi'an, China
| | - Y Liu
- State Key Laboratory of Military Stomatology and National Clinical Research Centre for Oral Diseases, and Department of Oral and Maxillofacial Surgery, School of Stomatology, the Fourth Military Medical University, Xi'an, China
| | - Z Zhang
- State Key Laboratory of Military Stomatology and National Clinical Research Centre for Oral Diseases, School of Stomatology, the Fourth Military Medical University, Xi'an, China
| | - B Cai
- State Key Laboratory of Military Stomatology and National Clinical Research Centre for Oral Diseases, and Department of Oral and Maxillofacial Surgery, School of Stomatology, the Fourth Military Medical University, Xi'an, China; State Key Laboratory of Military Stomatology and National Clinical Research Centre for Oral Diseases, School of Stomatology, the Fourth Military Medical University, Xi'an, China
| | - L Tian
- State Key Laboratory of Military Stomatology and National Clinical Research Centre for Oral Diseases, and Department of Oral and Maxillofacial Surgery, School of Stomatology, the Fourth Military Medical University, Xi'an, China.
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7
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Abstract
An arsenic-binding aptamer named Ars-3 was reported in 2009, and it has been used for detection of As(III) in more than two dozen papers. In this work, we performed extensive binding assays using isothermal titration calorimetry, various DNA-staining dyes, and gold nanoparticles. By carefully comparing Ars-3 and a few random control DNA sequences, no specific binding of As(III) was observed in each case. Therefore, we conclude that Ars-3 cannot bind As(III). Possible reasons for some of the previously reported binding and detection were speculated to be related to the adsorption of As(III) onto gold surfaces, which were used in many related sensor designs, and As(III)/Au interactions were not considered before. The selection data in the original paper were then analyzed in terms of sequence alignment, secondary structure prediction, and dissociation constant measurement. These steps need rigorous testing before confirming specific binding of newly selected aptamers. This study calls for attention to the gap between aptamer selection and biosensor design, and the gap needs to be filled by careful binding assays to further the growth of the aptamer field.
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Affiliation(s)
- Chenghua Zong
- Department of Chemistry and Materials Science, Jiangsu Key Laboratory of Green Synthesis for Functional Materials , Jiangsu Normal University , Xuzhou , Jiangsu 221116 , P.R. China.,Department of Chemistry, Waterloo Institute for Nanotechnology , University of Waterloo , Waterloo , Ontario N2L 3G1 , Canada
| | - Juewen Liu
- Department of Chemistry, Waterloo Institute for Nanotechnology , University of Waterloo , Waterloo , Ontario N2L 3G1 , Canada
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8
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Abstract
Gold nanoparticles (AuNPs) have been extensively used for detecting arsenite, As(III). Many methods rely on a DNA aptamer that claimed to bind specifically to inorganic arsenic. In these cases, the focus was on arsenic binding to the aptamer, while the potential interactions between As(III) and the AuNP surface were ignored. Herein, a set of spectroscopic and isothermal titration calorimetry (ITC) experiments were conducted to measure the adsorption of As(III) by AuNPs and its competition with DNA adsorption. With 10 mM As(III), 18% of adsorbed DNA was displaced from AuNPs, while preadsorption of only 20 μM As(III) inhibited DNA adsorption by around 50%. The affinity of As(III) on AuNPs is comparable to Br- and guanosine. ITC and Raman spectroscopy both indicated that only As(III) can be adsorbed, while As(V) had no measurable interactions with the AuNPs. Based on this understanding, a random DNA sequence was used and a similar colorimetric response in the presence of As(III) was observed. This study confirmed the affinity between As(III) and the gold surface. The As(III)/gold interaction is strong enough to affect DNA adsorption, and care should be taken to interpret the observations based on the color change of AuNPs for the detection of As(III).
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Affiliation(s)
- Chenghua Zong
- Department of Chemistry and Materials Science, Jiangsu Key Laboratory of Green Synthesis for Functional Materials , Jiangsu Normal University , Xuzhou , Jiangsu 221116 , P. R. China
- Department of Chemistry, Waterloo Institute for Nanotechnology , University of Waterloo , Waterloo , Ontario N2L 3G1 , Canada
| | - Zijie Zhang
- Department of Chemistry, Waterloo Institute for Nanotechnology , University of Waterloo , Waterloo , Ontario N2L 3G1 , Canada
| | - Biwu Liu
- Department of Chemistry, Waterloo Institute for Nanotechnology , University of Waterloo , Waterloo , Ontario N2L 3G1 , Canada
| | - Juewen Liu
- Department of Chemistry, Waterloo Institute for Nanotechnology , University of Waterloo , Waterloo , Ontario N2L 3G1 , Canada
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Zong C, Ge M, Pan H, Wang J, Nie X, Zhang Q, Zhao W, Liu X, Yu Y. In situ synthesis of low-cost and large-scale flexible metal nanoparticle–polymer composite films as highly sensitive SERS substrates for surface trace analysis. RSC Adv 2019; 9:2857-2864. [PMID: 35520535 PMCID: PMC9059991 DOI: 10.1039/c8ra08818g] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Accepted: 01/02/2019] [Indexed: 11/22/2022] Open
Abstract
Surface-enhanced Raman spectroscopy (SERS) has been one of the most promising analytical tools. Despite many efforts in the design of SERS substrates, it remains a great challenge for creating a general flexible substrate that could in situ detect analytes on diverse objects. Herein, we report our attempt to address this issue by developing a facile and versatile method capable of generating silver/gold nanoparticles in situ on the surface of a cellulose acetate (CA) polymer in a simple, cheap, practical, and capping agent-free way. The as-prepared substrates exhibit excellent sensitivity, which enabled detection of Rhodamine 6G at concentrations as low as 10−12 M. Taking advantage of the excellent flexibility and optical transparency of the CA matrix, the highly SERS-active substrate was applied for in situ identification and detection of pesticide residues on fruits. The results indicated that tetramethylthiuram disulfide (TMTD) and thiabendazole (TBZ) can be clearly identified at concentrations as low as 18.05 ng cm−2 and 15.1 ng cm−2, respectively, which were much lower than the maximum permitted residue doses with respect to food safety. Facile and large-scale synthesis of flexible metal nanoparticle–polymer composite films as highly sensitive SERS substrates for in situ food inspection.![]()
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Affiliation(s)
- Chenghua Zong
- School of Chemistry and Materials Science
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Mengyi Ge
- School of Chemistry and Materials Science
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Hong Pan
- School of Chemistry and Materials Science
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Jing Wang
- School of Chemistry and Materials Science
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Xinming Nie
- School of Physics and Electronic Engineering
- Jiangsu Normal University
- Xuzhou
- China
| | - Qingquan Zhang
- School of Chemistry and Materials Science
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Wenfeng Zhao
- School of Chemistry and Materials Science
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Xiaojun Liu
- School of Chemistry and Materials Science
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Yang Yu
- School of Chemistry and Materials Science
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
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Liu X, Huang C, Zong C, Liang A, Wu Z, Zhang Y, Zhang Q, Zhao W, Gai H. A Single-Molecule Homogeneous Immunoassay by Counting Spatially "Overlapping" Two-Color Quantum Dots with Wide-Field Fluorescence Microscopy. ACS Sens 2018; 3:2644-2650. [PMID: 30426743 DOI: 10.1021/acssensors.8b01092] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [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: 01/22/2023]
Abstract
We developed a single-molecule homogeneous immunoassay by counting spatially "overlapping" two-color quantum dots (QD) under a wide-field fluorescence microscope. QD 655 with red fluorescence and QD 565 with green fluorescence were modified with capture and detection antibodies, respectively. A capture antibody-modified QD 655 and a detection antibody-modified QD 565 were conjugated by a corresponding antigen molecule to form a "sandwich" immunocomplex. The conjugated QD 655 could not be distinguished from the conjugated QD 565 by fluorescent microscopy because the distance between them was smaller than the resolution of an optical microscope (approximately 200 nm). The immunocomplex color became yellow because of the spatial "overlap" of the red and green fluorescence. The number of the yellow spots was equal to the number of immunocomplex molecules, while the concentration of the antigen was related to the ratio of the yellow dots to the red dots. The successful quantification of two model proteins in the human plasma, namely, alpha-fetoprotein and carcinoembryonic antigen, demonstrated the accuracy and reliability of our approach.
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Affiliation(s)
- Xiaojun Liu
- School of Chemistry and Materials Science, Jiangsu Key Laboratory of Green Synthesis for Functional Materials, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
| | - Conghui Huang
- School of Chemistry and Materials Science, Jiangsu Key Laboratory of Green Synthesis for Functional Materials, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
| | - Chenghua Zong
- School of Chemistry and Materials Science, Jiangsu Key Laboratory of Green Synthesis for Functional Materials, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
| | - Aiye Liang
- Department of Physical Sciences, Charleston Southern University, Charleston, South Carolina 29406, United States
| | - Zhangjian Wu
- School of Chemistry and Materials Science, Jiangsu Key Laboratory of Green Synthesis for Functional Materials, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
| | - Yusu Zhang
- School of Chemistry and Materials Science, Jiangsu Key Laboratory of Green Synthesis for Functional Materials, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
| | - Qingquan Zhang
- School of Chemistry and Materials Science, Jiangsu Key Laboratory of Green Synthesis for Functional Materials, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
| | - Wenfeng Zhao
- School of Chemistry and Materials Science, Jiangsu Key Laboratory of Green Synthesis for Functional Materials, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
| | - Hongwei Gai
- School of Chemistry and Materials Science, Jiangsu Key Laboratory of Green Synthesis for Functional Materials, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
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Zong C, Li B, Wang J, Liu X, Zhao W, Zhang Q, Nie X, Yu Y. Visual and colorimetric determination of H2O2 and glucose based on citrate-promoted H2O2 sculpturing of silver nanoparticles. Mikrochim Acta 2018; 185:199. [DOI: 10.1007/s00604-018-2737-2] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2017] [Accepted: 02/16/2018] [Indexed: 11/25/2022]
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12
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Yang L, Zha Y, Feng J, Dong H, Zong C, Lei X, Liang N, Wang X, Gao G, Bai X. Treatment of a Pediatric Case of Severe Hemorrhagic Cystitis: Case Report and Review of Literature. Transplant Proc 2017; 49:2365-2367. [PMID: 29198679 DOI: 10.1016/j.transproceed.2017.10.014] [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] [Received: 06/17/2017] [Accepted: 10/04/2017] [Indexed: 11/16/2022]
Abstract
Hemorrhagic cystitis is one of the complications of allogeneic hematopoietic stem cell transplantation. Treatment of hemorrhagic cystitis is difficult, especially in pediatric patients. A pediatric case of severe hemorrhagic cystitis after hematopoietic stem cell transplantation was treated in our hospital with arterial embolization combined with corticosteroid therapy because the conventional therapy was invalid for him. After the treatment, hemorrhagic cystitis was cured. During follow-up, the patient was in stable condition, with normal urine, blood cells returned to normal, bone marrow was in complete remission state, and disease-free survival for more than 8 months. Selective bladder arterial embolism followed by corticosteroid therapy successfully treated the patient.
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Affiliation(s)
- L Yang
- Department of Hematology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shanxi, China
| | - Y Zha
- Department of Hematology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shanxi, China
| | - J Feng
- Department of Hematology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shanxi, China
| | - H Dong
- Department of Hematology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shanxi, China
| | - C Zong
- Department of Hematology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shanxi, China
| | - X Lei
- Department of Hematology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shanxi, China
| | - N Liang
- Department of Hematology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shanxi, China
| | - X Wang
- Department of Hematology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shanxi, China
| | - G Gao
- Department of Hematology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shanxi, China
| | - X Bai
- Department of Hematology, Xijing Hospital, Fourth Military Medical University, Xi'an, Shanxi, China.
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13
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Li H, Xue Y, Xu M, Zhao W, Zong C, Liu X, Zhang Q. Viscosity based droplet size controlling in negative pressure driven droplets generator for large-scale particle synthesis. Electrophoresis 2017; 38:1736-1742. [DOI: 10.1002/elps.201700023] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Revised: 04/12/2017] [Accepted: 04/13/2017] [Indexed: 01/17/2023]
Affiliation(s)
- Hanlin Li
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials; School of Chemistry and Chemical Engineering; Jiangsu Normal University; Xuzhou Jiangsu P. R. China
| | - Yijun Xue
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials; School of Chemistry and Chemical Engineering; Jiangsu Normal University; Xuzhou Jiangsu P. R. China
| | - Meng Xu
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials; School of Chemistry and Chemical Engineering; Jiangsu Normal University; Xuzhou Jiangsu P. R. China
| | - Wenfeng Zhao
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials; School of Chemistry and Chemical Engineering; Jiangsu Normal University; Xuzhou Jiangsu P. R. China
| | - Chenghua Zong
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials; School of Chemistry and Chemical Engineering; Jiangsu Normal University; Xuzhou Jiangsu P. R. China
| | - Xiaojun Liu
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials; School of Chemistry and Chemical Engineering; Jiangsu Normal University; Xuzhou Jiangsu P. R. China
| | - Qingquan Zhang
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials; School of Chemistry and Chemical Engineering; Jiangsu Normal University; Xuzhou Jiangsu P. R. China
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14
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Abstract
Developing highly sensitive and highly selective assays for monitoring heparin levels in blood is required during and after surgery. In previous studies, electrostatic interactions are exploited to recognize heparin and changes in light signal intensity are used to sense heparin. In the present study, we developed a quantum dot (QD) aggregation-based detection strategy to quantify heparin. When cationic micelles and fluorescence QDs modified with anti-thrombin III (AT III) are added into heparin sample solution, the AT III-QDs, which specifically bind with heparin, aggregate around the micelles. The aggregated QDs are recorded by spectral imaging fluorescence microscopy and differentiated from single QDs based on the asynchronous process of blue shift and photobleaching. The ratio of aggregated QD spots to all counted QD spots is linearly related to the amount of heparin in the range of 4.65 × 10 -4 U/mL to 0.023 U/mL. The limit of detection is 9.3 × 10 -5 U/mL (∼0.1 nM), and the recovery of the spiked heparin at 0.00465 U/mL (∼5 nM) in 0.1% human plasma is acceptable.
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Affiliation(s)
- Suli Dong
- Jiangsu
Key Laboratory of Green Synthesis for Functional Materials, School
of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
| | - Xiaojun Liu
- Jiangsu
Key Laboratory of Green Synthesis for Functional Materials, School
of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
| | - Qingquan Zhang
- Jiangsu
Key Laboratory of Green Synthesis for Functional Materials, School
of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
| | - Wenfeng Zhao
- Jiangsu
Key Laboratory of Green Synthesis for Functional Materials, School
of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
| | - Chenghua Zong
- Jiangsu
Key Laboratory of Green Synthesis for Functional Materials, School
of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
| | - Aiye Liang
- Department
of Physical Sciences, Charleston Southern University, Charleston, South Carolina 29406, United States
| | - Hongwei Gai
- Jiangsu
Key Laboratory of Green Synthesis for Functional Materials, School
of Chemistry and Materials Science, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
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15
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Zong C, Wang M, Li B, Liu X, Zhao W, Zhang Q, Liang A, Yu Y. Sensing of hydrogen peroxide and glucose in human serum via quenching fluorescence of biomolecule-stabilized Au nanoclusters assisted by the Fenton reaction. RSC Adv 2017. [DOI: 10.1039/c7ra01498h] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Sensitive detection of H2O2 and glucose were realized by Fenton reaction assistant oxidation of Au NCs.
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Affiliation(s)
- Chenghua Zong
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- School of Chemistry and Material Science
- Jiangsu Normal University
- Xuzhou
- China
| | - Min Wang
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- School of Chemistry and Material Science
- Jiangsu Normal University
- Xuzhou
- China
| | - Bo Li
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- School of Chemistry and Material Science
- Jiangsu Normal University
- Xuzhou
- China
| | - Xiaojun Liu
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- School of Chemistry and Material Science
- Jiangsu Normal University
- Xuzhou
- China
| | - Wenfeng Zhao
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- School of Chemistry and Material Science
- Jiangsu Normal University
- Xuzhou
- China
| | - Qingquan Zhang
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- School of Chemistry and Material Science
- Jiangsu Normal University
- Xuzhou
- China
| | - Aiye Liang
- Department of Physical Sciences
- Charleston Southern University
- Charleston
- USA
| | - Yang Yu
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- School of Chemistry and Material Science
- Jiangsu Normal University
- Xuzhou
- China
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16
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Zhang Q, Xu M, Liu X, Zhao W, Zong C, Yu Y, Wang Q, Gai H. Fabrication of Janus droplets by evaporation driven liquid-liquid phase separation. Chem Commun (Camb) 2016; 52:5015-8. [PMID: 26983706 DOI: 10.1039/c6cc00249h] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
We present a universal and scalable method to fabricate Janus droplets based on evaporation driven liquid-liquid phase separation. In this work, the morphologies and chemical properties of separate parts of the Janus droplets can be flexibly regulated, and more complex Janus droplets (such as core-shell Janus droplets, ternary Janus droplets, and multiple Janus droplets) can be constructed easily.
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Affiliation(s)
- Qingquan Zhang
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials, School of Chemistry and Chemical Engineering, Jiangsu Normal University, Xuzhou, Jiangsu 221116, P. R. China.
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17
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Liu X, Wu Z, Zhang Q, Zhao W, Zong C, Gai H. Single Gold Nanoparticle-Based Colorimetric Detection of Picomolar Mercury Ion with Dark-Field Microscopy. Anal Chem 2016; 88:2119-24. [DOI: 10.1021/acs.analchem.5b03653] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Xiaojun Liu
- Jiangsu Key Laboratory of
Green Synthesis for Functional Materials, School of Chemistry and
Chemical Engineering, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
| | - Zhangjian Wu
- Jiangsu Key Laboratory of
Green Synthesis for Functional Materials, School of Chemistry and
Chemical Engineering, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
| | - Qingquan Zhang
- Jiangsu Key Laboratory of
Green Synthesis for Functional Materials, School of Chemistry and
Chemical Engineering, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
| | - Wenfeng Zhao
- Jiangsu Key Laboratory of
Green Synthesis for Functional Materials, School of Chemistry and
Chemical Engineering, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
| | - Chenghua Zong
- Jiangsu Key Laboratory of
Green Synthesis for Functional Materials, School of Chemistry and
Chemical Engineering, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
| | - Hongwei Gai
- Jiangsu Key Laboratory of
Green Synthesis for Functional Materials, School of Chemistry and
Chemical Engineering, Jiangsu Normal University, Xuzhou, Jiangsu 221116, China
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18
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Abstract
We present an evaporation-driven miniaturized liquid fuel cell with high power density and high portability simultaneously.
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Affiliation(s)
- Qingquan Zhang
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- School of Chemistry and Chemical Engineering
- Jiangsu Normal University
- Xuzhou
- China
| | - Hanlin Li
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- School of Chemistry and Chemical Engineering
- Jiangsu Normal University
- Xuzhou
- China
| | - Xiaojun Liu
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- School of Chemistry and Chemical Engineering
- Jiangsu Normal University
- Xuzhou
- China
| | - Wenfeng Zhao
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- School of Chemistry and Chemical Engineering
- Jiangsu Normal University
- Xuzhou
- China
| | - Chenghua Zong
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- School of Chemistry and Chemical Engineering
- Jiangsu Normal University
- Xuzhou
- China
| | - Hongwei Gai
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- School of Chemistry and Chemical Engineering
- Jiangsu Normal University
- Xuzhou
- China
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19
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Shi X, Dong S, Li M, Liu X, Zhang Q, Zhao W, Zong C, Zhang Y, Gai H. Counting quantum dot aggregates for the detection of biotinylated proteins. Chem Commun (Camb) 2015; 51:2353-6. [DOI: 10.1039/c4cc02918f] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The method of quantifying the degree of aggregation of QDs in solution is realized by spectral imaging of the aggregate.
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Affiliation(s)
- Xingbo Shi
- College of Food Science and Technology
- Hunan Agricultural University Changsha
- Hunan
- P. R. China
| | - Suli Dong
- School of Chemistry and Chemical Engineering
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Minmin Li
- School of Chemistry and Chemical Engineering
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Xiaojun Liu
- School of Chemistry and Chemical Engineering
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Qingquan Zhang
- School of Chemistry and Chemical Engineering
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Wenfeng Zhao
- School of Chemistry and Chemical Engineering
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Chenghua Zong
- School of Chemistry and Chemical Engineering
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
| | - Yewang Zhang
- School of Pharmacy
- Jiangsu University
- Zhenjiang
- P. R. China
| | - Hongwei Gai
- School of Chemistry and Chemical Engineering
- Jiangsu Key Laboratory of Green Synthesis for Functional Materials
- Jiangsu Normal University
- Xuzhou
- P. R. China
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20
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Zong C, Zheng LR, He W, Ren X, Jiang C, Lu L. In Situ Formation of Phosphorescent Molecular Gold(I) Cluster in a Macroporous Polymer Film to Achieve Colorimetric Cyanide Sensing. Anal Chem 2014; 86:1687-92. [DOI: 10.1021/ac403480q] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Affiliation(s)
- Chenghua Zong
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, P.R. China
| | - Li Rong Zheng
- Beijing Synchrotron Radiation Facility, Institute of High Energy Physics, Chinese Academy of Science, Shijingshan District, Beijing 100049, P.R. China
| | - Wenhui He
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, P.R. China
| | - Xiaoyan Ren
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, P.R. China
| | - Chunhuan Jiang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, P.R. China
| | - Lehui Lu
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, P.R. China
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21
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Sun H, He W, Zong C, Lu L. Template-free synthesis of renewable macroporous carbon via yeast cells for high-performance supercapacitor electrode materials. ACS Appl Mater Interfaces 2013; 5:2261-2268. [PMID: 23452310 DOI: 10.1021/am400206r] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The urgent need for sustainable development has forced material scientists to explore novel materials for next-generation energy storage devices through a green and facile strategy. In this context, yeast, which is a large group of single cell fungi widely distributed in nature environments, will be an ideal candidate for developing effective electrode materials with fascinating structures for high-performance supercapacitors. With this in mind, herein, we present the first example of creating three-dimensional (3D) interpenetrating macroporous carbon materials via a template-free method, using the green, renewable, and widespread yeast cells as the precursors. Remarkably, when the as-prepared materials are used as the electrode materials for supercapacitors, they exhibit outstanding performance with high specific capacitance of 330 F g(-1) at a current density of 1 A g(-1), and good stability, even after 1000 charge/discharge cycles. The approach developed in this work provides a new view of making full use of sustainable resources endowed by nature, opening the avenue to designing and producing robust materials with great promising applications in high-performance energy-storage devices.
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Affiliation(s)
- Hongmei Sun
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, People's Republic of China
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22
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Liu X, Zong C, Ai K, He W, Lu L. Engineering natural materials as surface-enhanced Raman spectroscopy substrates for in situ molecular sensing. ACS Appl Mater Interfaces 2012; 4:6599-6608. [PMID: 23170894 DOI: 10.1021/am302376q] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Surface-enhanced Raman spectroscopy (SERS) is a powerful analytical tool. However, its applications for in situ detection of target molecules presented on diverse material surfaces have been hindered by difficulties in rapid fabricating SERS-active substrates on the surfaces of these materials through a simple, low-cost, and portable approach. Here, we demonstrate our attempt to address this issue by developing a facile and versatile method capable of in situ generating silver nanoparticle film (SNF) on the surfaces of both artificial and natural materials in a simple, cheap, practical, and disposable manner. Taking advantage of the high SERS enhancement ability of the prepared SNF, the proposed strategy can be used for in situ inspecting herbicide and pesticide residues on vegetables, as well as the abuse of antiseptic in aquaculture industry. Therefore, it opens new avenues for advancing the application prospects of SERS technique in the fields of food safety, drug security, as well as environment monitoring.
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Affiliation(s)
- Xiaojuan Liu
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun 130022, PR China
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23
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Pasqui V, Saint-Bauzel L, Zong C, Clady X, Decq P, Piette F, Michel-Pellegrino V, El Helou A, Carré M, Durand A, Hoang Q, Guiochet J, Rumeau P, Dupourque V, Caquas J. Projet MIRAS : robot d’assistance à la déambulation avec interaction multimodale. Ing Rech Biomed 2012. [DOI: 10.1016/j.irbm.2012.01.017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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24
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25
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Zong C, Liu X, Sun H, Zhang G, Lu L. A new type of nanoscale coordination particles: toward modification-free detection of hydrogen sulfide gas. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm32802j] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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27
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Zhang G, Liu Y, Yuan Q, Zong C, Liu J, Lu L. Dual modal in vivo imaging using upconversion luminescence and enhanced computed tomography properties. Nanoscale 2011; 3:4365-4371. [PMID: 21904751 DOI: 10.1039/c1nr10736d] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In vivo upconversion luminescence (UCL) imaging, exhibiting favorable characteristics such as high photostability, no blinking, sharp emission lines, and long lifetimes, is recognized as the excellent and significant photoluminescence imaging for the future. To develop the imaging system with high visual sensitivity and tissue penetration, the functional molecules with X-ray computed tomography (CT) contrast were grafted onto upconversion nanoparticles to obtain β-NaYF(4):18% Yb(3+),2%Er(3+)@SiO(2)-I/PEG (UCNPs@SiO(2)-I/PEG) nanoprobes. These nanoprobes are water-soluble, have low cytotoxicity, and possess excellent UCL and remarkable CT contrast. Of particular note is that, besides the element iodine, rare earth elements (Y, Yb, and Er) present in the nanoprobes also show CT contrast. Moreover, no background autofluorescence signal is found in in vivo UCL images. We believe that these nanoprobes with dual modal in vivo imaging of UCL and CT can serve as a promising platform for clinical diagnosis or biomedical studies.
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Affiliation(s)
- Guo Zhang
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, P. R. China
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28
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Abstract
An effective dual-emission fluorescent silica nanoparticle-based probe has been constructed for rapid and ultrasensitive detection of Cu(2+). In this nanoprobe, a dye-doped silica core served as a reference signal, thus providing a built-in correction for environmental effects. A response dye was covalently grafted on the surface of the silica nanoparticles through a chelating reagent for Cu(2+). The fluorescence of the response dye could be selectively quenched in the presence of Cu(2+), accompanied by a visual orange-to-green color switch of the nanoprobe. The nanoprobe provided an effective platform for reliable detection of Cu(2+) with a detection limit as low as 10 nM, which is nearly 2 × 10(3) times lower than the maximum level (∼20 μM) of Cu(2+) in drinking water permitted by the U.S. Environmental Protection Agency (EPA). The high sensitivity was attributed to the strong chelation of Cu(2+) with polyethyleneimine (PEI) and a signal amplification effect. The nanoprobe constructed by this method was very stable, enabling the rapid detection of Cu(2+) in real water samples. Good linear correlations were obtained over the concentration range from 1 × 10(-7) to 8 × 10(-7) (R(2) = 0.99) with recoveries of 103.8-99.14% and 95.5-95.14% for industrial wastewater and lake water, respectively. Additionally, the long-wavelength emission of the response dye can avoid the interference of the autofluorescence of the biosystems, which facilitated their applications in monitoring Cu(2+) in cells. Furthermore, the nanoprobe showed a good reversibility; the fluorescence can be switched "off" and "on" by an addition of Cu(2+) and EDTA, respectively.
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Affiliation(s)
- Chenghua Zong
- State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, 5625 Renmin Street, Changchun, 130022, People's Republic of China
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29
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Georgescu MM, Kirsch KH, Shishido T, Zong C, Hanafusa H. Biological effects of c-Mer receptor tyrosine kinase in hematopoietic cells depend on the Grb2 binding site in the receptor and activation of NF-kappaB. Mol Cell Biol 1999; 19:1171-81. [PMID: 9891051 PMCID: PMC116046 DOI: 10.1128/mcb.19.2.1171] [Citation(s) in RCA: 70] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The c-Mer receptor tyrosine kinase (RTK) is most closely related to chicken c-Eyk and belongs to the Axl RTK subfamily. Although not detected in normal lymphocytes, c-Mer is expressed in B- and T-cell leukemia cell lines, suggesting an association with lymphoid malignancies. To gain an understanding of the role of this receptor in lymphoid cells, we expressed in murine interleukin-3 (IL-3)-dependent Ba/F3 pro-B-lymphocyte cells a constitutively active receptor, CDMer, formed from the CD8 extracellular domain and the c-Mer intracellular domain. Cells transfected with a plasmid encoding the CDMer receptor became IL-3 independent. When tyrosine (Y)-to-phenylalanine (F) mutations were introduced into c-Mer, only the Y867 change significantly reduced the IL-3-independent cell proliferation. The Y867 residue in the CDMer receptor mediated the binding of Grb2, which recruited the p85 phosphatidylinositol 3-kinase (PI 3-kinase). Despite the difference in promotion of proliferation, both the CDMer and mutant F867 receptors activated Erk in transfected cells. On the other hand, we found that both transcriptional activation of NF-kappaB and activation of PI 3-kinase were significantly suppressed with the F867 mutant receptor, suggesting that the activation of antiapoptotic pathways is the major mechanism for the observed phenotypic difference. Consistent with this notion, apoptosis induced by IL-3 withdrawal was strongly prevented by CDMer but not by the F867 mutant receptor.
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Affiliation(s)
- M M Georgescu
- Laboratory of Molecular Oncology, The Rockefeller University, New York, New York 10021, USA
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30
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Nagata K, Ohashi K, Nakano T, Arita H, Zong C, Hanafusa H, Mizuno K. Identification of the product of growth arrest-specific gene 6 as a common ligand for Axl, Sky, and Mer receptor tyrosine kinases. J Biol Chem 1996; 271:30022-7. [PMID: 8939948 DOI: 10.1074/jbc.271.47.30022] [Citation(s) in RCA: 373] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Axl, Sky, and Mer, members of an Axl/Sky receptor tyrosine kinase subfamily, are typified by the cell adhesion molecule-related extracellular domain. The product of growth arrest-specific gene 6 (Gas6), structurally homologous to the anticoagulant protein S, was recently identified as the ligand for Axl and Sky, but the ligand for Mer remained unknown. We have now obtained evidence that Gas6 can also function as a ligand for Mer. Co-precipitation analysis, using soluble receptors of Axl, Sky, and Mer (Axl-Fc, Sky-Fc, and Mer-Fc) composed of the extracellular domain of receptors fused to the Fc domain of immunoglobulin G1, clearly showed that Gas6, but not protein S, specifically bound to Axl-Fc, Sky-Fc, and Mer-Fc fusion proteins. Quantitative kinetic analyses using a BIAcore biosensor instrument revealed dissociation constants (Kd) of the binding of rat Gas6 to Axl-Fc, Sky-Fc, and Mer-Fc are 0.4, 2.7, and 29 nM, respectively. We also found that Gas6 stimulated tyrosine phosphorylation of Axl, Sky, and Mer receptors ectopically expressed in Chinese hamster ovary cells. Taken together, these findings suggest that Gas6 is a common ligand for Axl, Sky, and Mer, all known members of an Axl/Sky receptor subfamily.
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Affiliation(s)
- K Nagata
- Department of Biology, Faculty of Science, Kyushu University, Fukuoka 812-81, Japan
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31
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Zong C, Yan R, August A, Darnell JE, Hanafusa H. Unique signal transduction of Eyk: constitutive stimulation of the JAK-STAT pathway by an oncogenic receptor-type tyrosine kinase. EMBO J 1996. [DOI: 10.1002/j.1460-2075.1996.tb00829.x] [Citation(s) in RCA: 60] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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32
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Zong C, Yan R, August A, Darnell JE, Hanafusa H. Unique signal transduction of Eyk: constitutive stimulation of the JAK-STAT pathway by an oncogenic receptor-type tyrosine kinase. EMBO J 1996; 15:4515-25. [PMID: 8887543 PMCID: PMC452181] [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] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
The proto-oncogene c-eyk, the cellular counterpart of a transforming oncogene, v-eyk, encodes a receptor protein tyrosine kinase with a distinctive extracellular region. We now demonstrate that c-Eyk can be constitutively activated through dimerization, and that the active Eyk displays a unique signaling pattern. When the kinase domain of c-Eyk was fused to the extracellular and transmembrane domains of CD8, the resulting chimera showed elevated kinase activity and caused cellular transformation. We found that the activated Eyk kinases, both v- and c-Eyk, constitutively stimulate the JAK-STAT pathway, while exerting little effect on other signaling routes such as the Ras-MAP kinase and the JNK pathways. The activated Eyk kinases specifically stimulate tyrosine phosphorylation of STAT1, STAT3 and JAK1. These downstream molecules also co-immunoprecipitate with the constitutively dimerized form of Eyk. The Eyk kinase activity is required for STAT1 stimulation. We found that the activation of STAT1 but not STAT3 correlates well with cellular transformation. In constitutively stimulating the JAK-STAT pathway, particularly STAT1, Eyk is unique in its downstream signaling and may be dependent on this pathway for cellular transformation.
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Affiliation(s)
- C Zong
- Laboratory of Molecular Oncology, The Rockefeller University, New York, NY 10021-6399, USA
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33
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Abstract
Monoclonal antibodies were raised against a specific human sperm protein and designated as the YWK-II mAb. The partial cDNA encoding the protein was isolated from a rat testis lambda gt11 expression library and the amino acid sequence of the protein was deduced. The cytoplasmic-transmembrane domains of the deduced protein had high homology with the A4 amyloid precursor protein of Alzheimer's disease. To evaluate the stage of spermatogenesis when the gene was expressed, single-stranded 35S-labeled RNA probes were prepared from the cDNA. By an in situ hybridization technique the mRNA for the antigen was detected in germ cells at all stages of spermatogenesis. The finding that the gene is expressed in spermatogonia suggests possible involvement in the initiation of germ cell differentiation or in the detachment of spermatogonia from the basement membrane.
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Affiliation(s)
- Y C Yan
- Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Beijing
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34
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Wang LF, Miao SY, Yan YC, Li YH, Zong C, Koide SS. Expression of a sperm protein gene during spermatogenesis in mammalian testis: an in situ hybridization study. Mol Reprod Dev 1990; 26:1-5. [PMID: 1693279 DOI: 10.1002/mrd.1080260102] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
In previous work a specific membrane protein with an estimated Mr of 20.1 kDa was purified from rabbit sperm tails and designated as rSMP-B protein. Antibodies were raised against rSMP-B protein and used to isolate and identify the cDNA coding the rSMP-B protein from a rat testis lambda gt11 expression library. The nucleotide sequence of the cDNA was determined in a previous study. Single-stranded 35S-labeled RNA probes were prepared. With the techniques of in situ hybridization, rSMP-B mRNA was detected in spermatids of rat and rabbit testis. The present results support our previous observation that immunization of male rabbits with the rSMP-B protein results in the arrest of spermatogenesis at the spermatid stage. Overall, rSMP-B protein appears to be involved in spermiogenesis, and the synthesis of the mRNA encoding the protein occurs in germ cells during the postmeiotic haploid phase of spermatogenesis.
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Affiliation(s)
- L F Wang
- Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Beijing
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