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Wang YT, Wu SM, Luo GQ, Xiao ST, Pu FF, Wang LY, Chang GG, Tian G, Yang XY. Dual Pd-Acid Sites Confined in a Hierarchical Core-Shell Structure for Hydrogenation of Nitrobenzene. Chem Asian J 2023; 18:e202300689. [PMID: 37704571 DOI: 10.1002/asia.202300689] [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: 08/07/2023] [Revised: 09/06/2023] [Accepted: 09/11/2023] [Indexed: 09/15/2023]
Abstract
A core-shell structured Pd@TS-1@meso-SiO2 catalyst with confined Pd nanometals has been fabricated by one-pot synthesis, impregnation method and sol-gel method. With the promotion of acid sites and protection of mesoporous silica shell, Pd@TS-1@meso-SiO2 shows higher activity than commercial comparison and higher stability than sample without mesoporous silica shell in the hydrogenation of nitrobenzene. The schematic illustration of the synergy effect is also proposed.
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Affiliation(s)
- Yi-Tian Wang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & International School of Materials Science and Engineering & School of Materials Science and Engineering & Shenzhen research institute of Wuhan University of Technology, School of Chemistry Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, 430071, P. R. China
| | - Si-Ming Wu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & International School of Materials Science and Engineering & School of Materials Science and Engineering & Shenzhen research institute of Wuhan University of Technology, School of Chemistry Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, 430071, P. R. China
| | - Guo-Qiang Luo
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & International School of Materials Science and Engineering & School of Materials Science and Engineering & Shenzhen research institute of Wuhan University of Technology, School of Chemistry Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, 430071, P. R. China
| | - Shi-Tian Xiao
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & International School of Materials Science and Engineering & School of Materials Science and Engineering & Shenzhen research institute of Wuhan University of Technology, School of Chemistry Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, 430071, P. R. China
| | - Fu-Fei Pu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & International School of Materials Science and Engineering & School of Materials Science and Engineering & Shenzhen research institute of Wuhan University of Technology, School of Chemistry Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, 430071, P. R. China
| | - Li-Ying Wang
- Department State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan, 430071, P. R. China
| | - Gang-Gang Chang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & International School of Materials Science and Engineering & School of Materials Science and Engineering & Shenzhen research institute of Wuhan University of Technology, School of Chemistry Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, 430071, P. R. China
| | - Ge Tian
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & International School of Materials Science and Engineering & School of Materials Science and Engineering & Shenzhen research institute of Wuhan University of Technology, School of Chemistry Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, 430071, P. R. China
| | - Xiao-Yu Yang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & International School of Materials Science and Engineering & School of Materials Science and Engineering & Shenzhen research institute of Wuhan University of Technology, School of Chemistry Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan, 430071, P. R. China
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2
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Zhou X, Wu SM, Schmuki P. Spontaneous Dewetting of Au-Thin Layers on Oxide- and Fluorine-Terminated Single Crystalline Anatase and Efficient Use in Photocatalytic H 2 Production. Small 2023; 19:e2303306. [PMID: 37357164 DOI: 10.1002/smll.202303306] [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] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 05/26/2023] [Indexed: 06/27/2023]
Abstract
In the present work, the spontaneous dewetting of thin Au layers on single crystalline anatase nanosheets into narrow-disperse Au nanoparticles is investigated. Patterns of the Au particles can be formed on the main facets of anatase that provide a high co-catalytic activity for photocatalytic generation of H2 . Dewetting is distinctly influenced by the respective facets (001) and (101), the deposit thickness, and secondary thermal dewetting, but most strongly by the surface termination of the nanosheets. Fluoride termination not only leads to an enhanced Au-phobic behavior but strongly affects the co-catalytic activity for photocatalytic generation of H2 . While fluoride termination with or without Au decoration is detrimental for hole transfer, the interplay of the Au co-catalyst and surface fluoride yields highly beneficial effect for electron transfer. This results in a three-times higher photocatalytic H2 production for the F-terminated surface. The findings suggest that dewetting of Au on surface fluorinated TiO2 is an effective way to modulate surface dewetting and achieve a strongly enhanced photocatalytic activity.
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Affiliation(s)
- Xin Zhou
- Department of Materials Science WW4-LKO, University of Erlangen-Nuremberg, Martensstrasse 7, 91058, Erlangen, Germany
| | - Si-Ming Wu
- Department of Materials Science WW4-LKO, University of Erlangen-Nuremberg, Martensstrasse 7, 91058, Erlangen, Germany
| | - Patrik Schmuki
- Department of Materials Science WW4-LKO, University of Erlangen-Nuremberg, Martensstrasse 7, 91058, Erlangen, Germany
- Regional Centre of Advanced Technologies and Materials, Palacký University Olomouc, Šlechtitelů 241/27, Olomouc, 77900, Czech Republic
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3
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Xiao ST, Wu SM, Wu L, Dong Y, Liu JW, Wang LY, Chen XY, Wang YT, Tian G, Chang GG, Shalom M, Fornasiero P, Yang XY. Confined Heterojunction in Hollow-Structured TiO 2 and Its Directed Effect in Photodriven Seawater Splitting. ACS Nano 2023; 17:18217-18226. [PMID: 37668497 DOI: 10.1021/acsnano.3c05174] [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] [Subscribe] [Scholar Register] [Indexed: 09/06/2023]
Abstract
The high salinity of seawater often strongly affects the activity and stability of photocatalysts utilized for photodriven seawater splitting. The current investigation is focused on the photocatalyst H-TiO2/Cu2O, comprised of hydroxyl-enriched hollow mesoporous TiO2 microspheres containing incorporated Cu2O nanoparticles. The design of H-TiO2/Cu2O is based on the hypothesis that the respective hollow and mesoporous structure and hydrophilic surfaces of TiO2 microspheres would stabilize Cu2O nanoparticles in seawater and provide efficient and selective proton adsorption. H-TiO2/Cu2O shows hydrogen production performances of 45.7 mmol/(g·h) in simulated seawater and 17.9 mmol/(g·h) in natural seawater, respectively. An apparent quantum yield (AQY) in hydrogen production of 18.8% in water (and 14.9% in natural seawater) was obtained at 365 nm. Moreover, H-TiO2/Cu2O displays high stability and can maintain more than 90% hydrogen evolution activity in natural seawater for 30 h. A direct mass- and energy- transfer mechanism is proposed to clarify the superior performance of H-TiO2/Cu2O in seawater splitting.
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Affiliation(s)
- Shi-Tian Xiao
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & School of Chemistry, Chemical Engineering and Life Sciences & Shenzhen Research Institute & Laoshan Laboratory, Wuhan University of Technology, Wuhan 430070, China
| | - Si-Ming Wu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & School of Chemistry, Chemical Engineering and Life Sciences & Shenzhen Research Institute & Laoshan Laboratory, Wuhan University of Technology, Wuhan 430070, China
| | - Lu Wu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & School of Chemistry, Chemical Engineering and Life Sciences & Shenzhen Research Institute & Laoshan Laboratory, Wuhan University of Technology, Wuhan 430070, China
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Yu Dong
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & School of Chemistry, Chemical Engineering and Life Sciences & Shenzhen Research Institute & Laoshan Laboratory, Wuhan University of Technology, Wuhan 430070, China
| | - Jia-Wen Liu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & School of Chemistry, Chemical Engineering and Life Sciences & Shenzhen Research Institute & Laoshan Laboratory, Wuhan University of Technology, Wuhan 430070, China
| | - Li-Ying Wang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China
| | - Xin-Yi Chen
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & School of Chemistry, Chemical Engineering and Life Sciences & Shenzhen Research Institute & Laoshan Laboratory, Wuhan University of Technology, Wuhan 430070, China
| | - Yi-Tian Wang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & School of Chemistry, Chemical Engineering and Life Sciences & Shenzhen Research Institute & Laoshan Laboratory, Wuhan University of Technology, Wuhan 430070, China
| | - Ge Tian
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & School of Chemistry, Chemical Engineering and Life Sciences & Shenzhen Research Institute & Laoshan Laboratory, Wuhan University of Technology, Wuhan 430070, China
| | - Gang-Gang Chang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & School of Chemistry, Chemical Engineering and Life Sciences & Shenzhen Research Institute & Laoshan Laboratory, Wuhan University of Technology, Wuhan 430070, China
| | - Menny Shalom
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Paolo Fornasiero
- Department of Chemical and Pharmaceutical Sciences, University of Trieste and ICCOM-CNR and INSTM Trieste Research Units, Via L. Giorgieri 1, 34127 Trieste, Italy
| | - Xiao-Yu Yang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & School of Chemistry, Chemical Engineering and Life Sciences & Shenzhen Research Institute & Laoshan Laboratory, Wuhan University of Technology, Wuhan 430070, China
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4
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Wu SM, Antonietti M, Yang XY. Visualization of charge carriers in photocatalysts. Natl Sci Rev 2023; 10:nwad188. [PMID: 37936831 PMCID: PMC10627106 DOI: 10.1093/nsr/nwad188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 06/21/2023] [Accepted: 06/28/2023] [Indexed: 11/09/2023] Open
Abstract
Surface photovoltage techniques combined with time-resolved spectroscopy methods provide an effective way to visualize the charge transfer dynamics in photocatalytic reactions.
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Affiliation(s)
- Si-Ming Wu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing and Laoshan Laboratory, Wuhan University of Technology, China
| | - Markus Antonietti
- Department of Colloid Chemistry, Max Planck Institute of Colloids and Interfaces, Germany
| | - Xiao-Yu Yang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing and Laoshan Laboratory, Wuhan University of Technology, China
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5
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Yuan Y, Wu FJ, Xiao ST, Wang YT, Yin ZW, Van Tendeloo G, Chang GG, Tian G, Hu ZY, Wu SM, Yang XY. Hierarchical zeolites containing embedded Cd 0.2Zn 0.8S as a photocatalyst for hydrogen production from seawater. Chem Commun (Camb) 2023. [PMID: 37227003 DOI: 10.1039/d3cc01409f] [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: 05/26/2023]
Abstract
Uncovering an efficient and stable photocatalytic system for seawater splitting is a highly desirable but challenging goal. Herein, Cd0.2Zn0.8S@Silicalite-1 (CZS@S-1) composites, in which CZS is embedded in the hierarchical zeolite S-1, were prepared and show remarkably high activity, stability and salt resistance in seawater.
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Affiliation(s)
- Yue Yuan
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & Nanostructure Research Centre & Chemical Engineering and Life Science School of Chemistry & Shenzhen Research Institute, Wuhan University of Technology, Wuhan, 430070, China.
| | - Feng-Juan Wu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & Nanostructure Research Centre & Chemical Engineering and Life Science School of Chemistry & Shenzhen Research Institute, Wuhan University of Technology, Wuhan, 430070, China.
| | - Shi-Tian Xiao
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & Nanostructure Research Centre & Chemical Engineering and Life Science School of Chemistry & Shenzhen Research Institute, Wuhan University of Technology, Wuhan, 430070, China.
| | - Yi-Tian Wang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & Nanostructure Research Centre & Chemical Engineering and Life Science School of Chemistry & Shenzhen Research Institute, Wuhan University of Technology, Wuhan, 430070, China.
| | - Zhi-Wen Yin
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & Nanostructure Research Centre & Chemical Engineering and Life Science School of Chemistry & Shenzhen Research Institute, Wuhan University of Technology, Wuhan, 430070, China.
| | - Gustaaf Van Tendeloo
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & Nanostructure Research Centre & Chemical Engineering and Life Science School of Chemistry & Shenzhen Research Institute, Wuhan University of Technology, Wuhan, 430070, China.
- Electron Microscopy for Materials Science, University of Antwerp, Antwerpen B-2020, Belgium
| | - Gang-Gang Chang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & Nanostructure Research Centre & Chemical Engineering and Life Science School of Chemistry & Shenzhen Research Institute, Wuhan University of Technology, Wuhan, 430070, China.
| | - Ge Tian
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & Nanostructure Research Centre & Chemical Engineering and Life Science School of Chemistry & Shenzhen Research Institute, Wuhan University of Technology, Wuhan, 430070, China.
| | - Zhi-Yi Hu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & Nanostructure Research Centre & Chemical Engineering and Life Science School of Chemistry & Shenzhen Research Institute, Wuhan University of Technology, Wuhan, 430070, China.
| | - Si-Ming Wu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & Nanostructure Research Centre & Chemical Engineering and Life Science School of Chemistry & Shenzhen Research Institute, Wuhan University of Technology, Wuhan, 430070, China.
| | - Xiao-Yu Yang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & Nanostructure Research Centre & Chemical Engineering and Life Science School of Chemistry & Shenzhen Research Institute, Wuhan University of Technology, Wuhan, 430070, China.
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6
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Xiao ST, Yin R, Wu L, Wu SM, Tian G, Shalom M, Wang LY, Wang YT, Pu FF, Barad HN, Wang F, Yang XY. Hierarchically Porous Few-Layer Carbon Nitride and Its High H + Selectivity for Efficient Photocatalytic Seawater Splitting. Nano Lett 2023; 23:4390-4398. [PMID: 37154763 DOI: 10.1021/acs.nanolett.3c00661] [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] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Photocatalysts for seawater splitting are severely restricted because of the presence of multiple types of ions in seawater that cause corrosion and deactivation. As a result, new materials that promote adsorption of H+ and hinder competing adsorption of metal cations should enhance utilization of photogenerated electrons on the catalyst surface for efficient H2 production. One strategy to design advanced photocatalysts involves introduction of hierarchical porous structures that enable fast mass transfer and creation of defect sites that promote selective hydrogen ion adsorption. Herein, we used a facile calcination method to fabricate the macro-mesoporous C3N4 derivative, VN-HCN, that contains multiple nitrogen vacancies. We demonstrated that VN-HCN has enhanced corrosion resistance and elevated photocatalytic H2 production performance in seawater. Experimental results and theoretical calculations reveal that enhanced mass and carrier transfer and selective adsorption of hydrogen ions are key features of VN-HCN that lead to its high seawater splitting activity.
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Affiliation(s)
- Shi-Tian Xiao
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & State Key Laboratory of Silicate Materials for Architectures & Shenzhen Research Institute, Wuhan University of Technology, Wuhan 430070, China
| | - Rui Yin
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & State Key Laboratory of Silicate Materials for Architectures & Shenzhen Research Institute, Wuhan University of Technology, Wuhan 430070, China
| | - Lu Wu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & State Key Laboratory of Silicate Materials for Architectures & Shenzhen Research Institute, Wuhan University of Technology, Wuhan 430070, China
- Key Laboratory for the Synthesis and Application of Organic Functional Molecules, Ministry of Education, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Si-Ming Wu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & State Key Laboratory of Silicate Materials for Architectures & Shenzhen Research Institute, Wuhan University of Technology, Wuhan 430070, China
| | - Ge Tian
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & State Key Laboratory of Silicate Materials for Architectures & Shenzhen Research Institute, Wuhan University of Technology, Wuhan 430070, China
| | - Menny Shalom
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Li-Ying Wang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China
| | - Yi-Tian Wang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & State Key Laboratory of Silicate Materials for Architectures & Shenzhen Research Institute, Wuhan University of Technology, Wuhan 430070, China
| | - Fu-Fei Pu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & State Key Laboratory of Silicate Materials for Architectures & Shenzhen Research Institute, Wuhan University of Technology, Wuhan 430070, China
| | - Hannah-Noa Barad
- Department of Chemistry, Institute of Nanotechnology & Advanced Materials, Bar Ilan University, Ramat Gan 5290002, Israel
| | - Fazhou Wang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & State Key Laboratory of Silicate Materials for Architectures & Shenzhen Research Institute, Wuhan University of Technology, Wuhan 430070, China
| | - Xiao-Yu Yang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & State Key Laboratory of Silicate Materials for Architectures & Shenzhen Research Institute, Wuhan University of Technology, Wuhan 430070, China
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7
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Seilheimer RL, McClard CK, Sabharwal J, Wu SM. Modulation of narrow-field amacrine cells on light-evoked spike responses and receptive fields of retinal ganglion cells. Vision Res 2023; 205:108186. [PMID: 36764009 DOI: 10.1016/j.visres.2023.108186] [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: 11/21/2022] [Revised: 01/21/2023] [Accepted: 01/23/2023] [Indexed: 02/10/2023]
Abstract
By using multi-electrode array (MEA) recording technique in conjunction with white-noise checkerboard stimuli and reverse correlation methods, we studied modulatory actions of glycinergic narrow-field amacrine cells (NFACs) on spatiotemporal profiles of five functional groups of ganglion cells (GCs) in dark-adapted mouse retinas. We found that application of 2 µM strychnine significantly altered light-evoked spike rates of three groups of GCs. It also decreased receptive field center radii of all five groups of GC by a mean value of 11%, and shifted the GC receptive field (RF) centers of all GCs and the mean shift distances for the sustained GCs are significantly longer than the transient GCs. On the other hand, strychnine did not affect temporal profiles of the GC center responses, as it did not alter the time-to-peak or the biphasic index of the spike triggered average (STA) functions of GC RF centers. Strychnine also exerts limited actions on RF surrounds of most GCs, except that it moderately weakens the antagonistic surround of sustained OFF GCs and strengthens the antagonistic surround of the ON/OFF GCs, possibly through serial connections between NFACs and GABAergic wide-field amacrine cells (WFACs). Using the Sum of Separable Subfilter (SoSS) model and singular value decomposition method, we decomposed GCs' STAs into five space-time separable subfilters, studied the observation rates of each subfilter in the five functional groups of GCs and determined NFAC-dependent and -independent synaptic circuitries that mediate center and surround responses of various groups of mouse retina retinal ganglion cells.
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Affiliation(s)
- R L Seilheimer
- Cullen Eye Institute, Baylor College of Medicine, Houston, TX 77030, United States
| | - C K McClard
- Cullen Eye Institute, Baylor College of Medicine, Houston, TX 77030, United States
| | - J Sabharwal
- Cullen Eye Institute, Baylor College of Medicine, Houston, TX 77030, United States
| | - S M Wu
- Cullen Eye Institute, Baylor College of Medicine, Houston, TX 77030, United States.
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8
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Wang LX, Li YP, Wu SM, Zhang JR, Kong L, Lu B, Liu FW, Li ZY. [Research progress on the role of adipose-derived stem cell exosomes in skin scar formation]. Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi 2023; 39:295-300. [PMID: 37805729 DOI: 10.3760/cma.j.cn501225-20220308-00057] [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] [Subscribe] [Scholar Register] [Indexed: 10/09/2023]
Abstract
The adipose-derived stem cell exosomes are subcellular structures of adipose stem cells. They are nano-sized membrane vesicles that can transport various cell components and act on target cells by paracrine, and they play an important role in the exchanges of substance and information between cells. Scar healing is the commonest way of healing after skin tissue injury. Pathological scar can not only cause movement dysfunction, but also lead to deformity, which affects the appearance of patients and brings life and mental pressure to the patients. In recent years, many researches have shown that the adipose-derived stem cell exosomes contain a variety of bioactive molecules, which play an important role in reducing scar formation and scar-free wound healing, by affecting the proliferation and migration of fibroblasts and the composition of extracellular matrix. This article reviewed the recent literature on the roles and mechanisms of adipose-derived stem cell exosomes in scar formation, and prospected the future application and development of adipose-derived stem cell exosomes in scar treatment.
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Affiliation(s)
- L X Wang
- Basic Medical Science Academy of Air Force Medical University, Xi'an 710032, China
| | - Y P Li
- Department of Oral and Maxillofacial Surgery, the Third Affiliated Hospital of Air Force Medical University, State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Clinical Research Center for Oral Diseases, Xi'an 710032, China
| | - S M Wu
- Department of Oral and Maxillofacial Surgery, the Third Affiliated Hospital of Air Force Medical University, State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Clinical Research Center for Oral Diseases, Xi'an 710032, China
| | - J R Zhang
- Department of Oral and Maxillofacial Surgery, the Third Affiliated Hospital of Air Force Medical University, State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Clinical Research Center for Oral Diseases, Xi'an 710032, China
| | - L Kong
- Department of Oral and Maxillofacial Surgery, the Third Affiliated Hospital of Air Force Medical University, State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Clinical Research Center for Oral Diseases, Xi'an 710032, China
| | - B Lu
- Department of Oral and Maxillofacial Surgery, the Third Affiliated Hospital of Air Force Medical University, State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Clinical Research Center for Oral Diseases, Xi'an 710032, China
| | - F W Liu
- Department of Oral and Maxillofacial Surgery, the Third Affiliated Hospital of Air Force Medical University, State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Clinical Research Center for Oral Diseases, Xi'an 710032, China
| | - Z Y Li
- Department of Oral and Maxillofacial Surgery, the Third Affiliated Hospital of Air Force Medical University, State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Clinical Research Center for Oral Diseases, Xi'an 710032, China
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9
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Wu SM, Hwang I, Osuagwu B, Will J, Wu Z, Sarma BB, Pu FF, Wang LY, Badura Z, Zoppellaro G, Spiecker E, Schmuki P. Fluorine Aided Stabilization of Pt Single Atoms on TiO 2 Nanosheets and Strongly Enhanced Photocatalytic H 2 Evolution. ACS Catal 2022. [DOI: 10.1021/acscatal.2c04481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Si-Ming Wu
- Department of Materials Science WW4-LKO, University of Erlangen-Nuremberg, Martensstraße 7, 91058 Erlangen, Germany
| | - Imgon Hwang
- Department of Materials Science WW4-LKO, University of Erlangen-Nuremberg, Martensstraße 7, 91058 Erlangen, Germany
| | - Benedict Osuagwu
- Department of Materials Science WW4-LKO, University of Erlangen-Nuremberg, Martensstraße 7, 91058 Erlangen, Germany
| | - Johannes Will
- Institute of Micro- and Nanostructure Research & Center for Nanoanalysis and Electron Microscopy (CENEM), University of Erlangen-Nuremberg, IZNF, Cauerstraße 3, 91058 Erlangen, Germany
| | - Zhenni Wu
- Department of Materials Science WW4-LKO, University of Erlangen-Nuremberg, Martensstraße 7, 91058 Erlangen, Germany
| | - Bidyut Bikash Sarma
- Institute of Catalysis Research and Technology (IKFT) and Institute for Chemical Technology and Polymer Chemistry (ITCP), Karlsruhe Institute of Technology (KIT), Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Fu-Fei Pu
- School of Materials Science and Engineering, Wuhan University of Technology, Wuhan, 430070, China
| | - Li-Ying Wang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan, 430071, China
| | - Zdenek Badura
- Regional Centre of Advanced Technologies and Materials, Šlechtitelů 27, Olomouc 78371, Czech Republic
| | - Giorgio Zoppellaro
- Regional Centre of Advanced Technologies and Materials, Šlechtitelů 27, Olomouc 78371, Czech Republic
| | - Erdmann Spiecker
- Institute of Micro- and Nanostructure Research & Center for Nanoanalysis and Electron Microscopy (CENEM), University of Erlangen-Nuremberg, IZNF, Cauerstraße 3, 91058 Erlangen, Germany
| | - Patrik Schmuki
- Department of Materials Science WW4-LKO, University of Erlangen-Nuremberg, Martensstraße 7, 91058 Erlangen, Germany
- Regional Centre of Advanced Technologies and Materials, Šlechtitelů 27, Olomouc 78371, Czech Republic
- Department of Chemistry, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21569, Saudi Arabia
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10
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Fang F, Wang Y, Shen LW, Tian G, Cahen D, Xiao YX, Chen JB, Wu SM, He L, Ozoemena KI, Symes MD, Yang XY. Interfacial Carbon Makes Nano-Particulate RuO 2 an Efficient, Stable, pH-Universal Catalyst for Splitting of Seawater. Small 2022; 18:e2203778. [PMID: 36103609 DOI: 10.1002/smll.202203778] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/18/2022] [Revised: 08/21/2022] [Indexed: 06/15/2023]
Abstract
An electrocatalyst composed of RuO2 surrounded by interfacial carbon, is synthesized through controllable oxidization-calcination. This electrocatalyst provides efficient charge transfer, numerous active sites, and promising activity for pH-universal electrocatalytic overall seawater splitting. An electrolyzer with this catalyst gives current densities of 10 mA cm-2 at a record low cell voltage of 1.52 V, and shows excellent durability at current densities of 10 mA cm-2 for up to 100 h. Based on the results, a mechanism for the catalytic activity of the composite is proposed. Finally, a solar-driven system is assembled and used for overall seawater splitting, showing 95% Faraday efficiency.
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Affiliation(s)
- Fang Fang
- State Key Laboratory of Advanced Technology for Materials Synthesis andProcessing & School of Materials Science and Engineering & International School of Materials Science and Engineering & Shenzhen Research Institute & Joint Laboratory for Marine Advanced Materials in Pilot National Laboratory for Marine Science and Technology (Qingdao), Wuhan University of Technology, Wuhan, 430070, China
| | - Yong Wang
- State Key Laboratory of Advanced Technology for Materials Synthesis andProcessing & School of Materials Science and Engineering & International School of Materials Science and Engineering & Shenzhen Research Institute & Joint Laboratory for Marine Advanced Materials in Pilot National Laboratory for Marine Science and Technology (Qingdao), Wuhan University of Technology, Wuhan, 430070, China
| | - Le-Wei Shen
- State Key Laboratory of Advanced Technology for Materials Synthesis andProcessing & School of Materials Science and Engineering & International School of Materials Science and Engineering & Shenzhen Research Institute & Joint Laboratory for Marine Advanced Materials in Pilot National Laboratory for Marine Science and Technology (Qingdao), Wuhan University of Technology, Wuhan, 430070, China
| | - Ge Tian
- State Key Laboratory of Advanced Technology for Materials Synthesis andProcessing & School of Materials Science and Engineering & International School of Materials Science and Engineering & Shenzhen Research Institute & Joint Laboratory for Marine Advanced Materials in Pilot National Laboratory for Marine Science and Technology (Qingdao), Wuhan University of Technology, Wuhan, 430070, China
| | - David Cahen
- Department of Chemistry, and Bar-Ilan Inst. for Nanotechnol. & Adv. Mater. (BINA), Bar-Ilan University, Ramat Gan, 5290002, Israel
- Weizmann Inst. of Science, Rehovot, 76100, Israel
| | - Yu-Xuan Xiao
- State Key Laboratory of Advanced Technology for Materials Synthesis andProcessing & School of Materials Science and Engineering & International School of Materials Science and Engineering & Shenzhen Research Institute & Joint Laboratory for Marine Advanced Materials in Pilot National Laboratory for Marine Science and Technology (Qingdao), Wuhan University of Technology, Wuhan, 430070, China
| | - Jiang-Bo Chen
- State Key Laboratory of Advanced Technology for Materials Synthesis andProcessing & School of Materials Science and Engineering & International School of Materials Science and Engineering & Shenzhen Research Institute & Joint Laboratory for Marine Advanced Materials in Pilot National Laboratory for Marine Science and Technology (Qingdao), Wuhan University of Technology, Wuhan, 430070, China
| | - Si-Ming Wu
- State Key Laboratory of Advanced Technology for Materials Synthesis andProcessing & School of Materials Science and Engineering & International School of Materials Science and Engineering & Shenzhen Research Institute & Joint Laboratory for Marine Advanced Materials in Pilot National Laboratory for Marine Science and Technology (Qingdao), Wuhan University of Technology, Wuhan, 430070, China
| | - Liang He
- State Key Laboratory of Advanced Technology for Materials Synthesis andProcessing & School of Materials Science and Engineering & International School of Materials Science and Engineering & Shenzhen Research Institute & Joint Laboratory for Marine Advanced Materials in Pilot National Laboratory for Marine Science and Technology (Qingdao), Wuhan University of Technology, Wuhan, 430070, China
| | - Kenneth I Ozoemena
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Private Bag 3, Johannesburg, 2050, South Africa
| | - Mark D Symes
- WestCHEM, School of Chemistry, University of Glasgow, University Avenue, Glasgow, G12 8QQ, UK
| | - Xiao-Yu Yang
- State Key Laboratory of Advanced Technology for Materials Synthesis andProcessing & School of Materials Science and Engineering & International School of Materials Science and Engineering & Shenzhen Research Institute & Joint Laboratory for Marine Advanced Materials in Pilot National Laboratory for Marine Science and Technology (Qingdao), Wuhan University of Technology, Wuhan, 430070, China
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11
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Wu SM, Wang YT, Xiao ST, Wang LY, Tian G, Chen JB, Liu JW, Shalom M, Yang XY. A spatial homojunction of titanium vacancies decorated with oxygen vacancies in TiO 2 and its directed charge transfer. Nanoscale 2022; 14:13373-13377. [PMID: 36069354 DOI: 10.1039/d2nr03877c] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
The n-p homojunction design in semiconductors could enable directed charge transfer, which is promising but rarely reported. Herein, TiO2 with a spatial n-p homojunction has been designed by decorating TiO2 nanosheets with Ti vacancies around nanostructured TiO2 with O vacancies. 2D 1H TQ-SQ MAS NMR, EPR and XPS show the junction of titanium vacancies and oxygen vacancies at the interface. This spatial homojunction contributes to a significant enhancement in photoelectrochemical and photocatalytic performance, especially photocatalytic seawater splitting. Density functional theory calculations of the charge density reveal the directional n-p charge transfer path at the interface, which is proposed at the atomic-/nanoscale to clarify the generation of rational junctions. The spatial n-p homojunction provides a facile strategy for the design of high-performance semiconductors.
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Affiliation(s)
- Si-Ming Wu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & Shenzhen Research Institute & Joint Laboratory for Marine Advanced Materials in National Laboratory for Marine Science and Technology (Qingdao), Wuhan University of Technology, Wuhan, 430070, China.
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.
| | - Yi-Tian Wang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & Shenzhen Research Institute & Joint Laboratory for Marine Advanced Materials in National Laboratory for Marine Science and Technology (Qingdao), Wuhan University of Technology, Wuhan, 430070, China.
| | - Shi-Tian Xiao
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & Shenzhen Research Institute & Joint Laboratory for Marine Advanced Materials in National Laboratory for Marine Science and Technology (Qingdao), Wuhan University of Technology, Wuhan, 430070, China.
| | - Li-Ying Wang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan, 430071, China
| | - Ge Tian
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & Shenzhen Research Institute & Joint Laboratory for Marine Advanced Materials in National Laboratory for Marine Science and Technology (Qingdao), Wuhan University of Technology, Wuhan, 430070, China.
| | - Jiang-Bo Chen
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & Shenzhen Research Institute & Joint Laboratory for Marine Advanced Materials in National Laboratory for Marine Science and Technology (Qingdao), Wuhan University of Technology, Wuhan, 430070, China.
| | - Jia-Wen Liu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & Shenzhen Research Institute & Joint Laboratory for Marine Advanced Materials in National Laboratory for Marine Science and Technology (Qingdao), Wuhan University of Technology, Wuhan, 430070, China.
| | - Menny Shalom
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Xiao-Yu Yang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of Materials Science and Engineering & Shenzhen Research Institute & Joint Laboratory for Marine Advanced Materials in National Laboratory for Marine Science and Technology (Qingdao), Wuhan University of Technology, Wuhan, 430070, China.
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA.
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12
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Li ST, Lin Y, Ou BX, Liu DE, Li QW, Nong YJ, Wu SM, Qiu ZX, Huang Z. [Effects of comprehensive treatment of infected wounds in patients with iatrogenic Cushing 's syndrome]. Zhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi 2022; 38:512-519. [PMID: 35764576 DOI: 10.3760/cma.j.cn501225-20220329-00106] [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] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Objective: To investigate the characteristics and comprehensive treatment of infected wounds in patients with iatrogenic Cushing's syndrome. Methods: A retrospective observational study was conducted. From May 2012 to December 2021, the data of 19 patients with iatrogenic Cushing's syndrome discharged from the Department of Burns and Plastic Surgery of the First Affiliated Hospital of Guangxi Medical University were collected, including 8 males and 11 females, aged 28-71 (56±11) years, with 12 cases of infected acute wounds and 7 cases of infected chronic wounds. The lesions were located in the limbs, perianal, and sacrococcygeal regions, with original infection ranging from 9 cm×5 cm to 85 cm×45 cm. After admission, the patients were performed with multidisciplinary assisted diagnosis and treatment, and the wounds were treated with debridement and vacuum sealing drainage, according to the size, severity of infection, suture tension, and bone and tendon tissue exposure of wounds, direct suture or autologous skin and/or artificial dermis and/or autologous tissue flap transplantation was selected for wound repair. The levels of cortisol and adrenocorticotropic hormone (ACTH) of patients at 8:00, 16:00, and 24:00 within 24 h after admission were counted. After admission, the number of operations, wound repair methods, and wound and skin/flap donor site healing of patients were recorded. During follow-up, the wounds were observed for recurrent infection. Results: The cortisol levels of 16 patients at 8:00, 16:00, and 24:00 within 24 h after admission were (130±54), (80±16), and (109±39) nmol/L, respectively, and ACTH levels were (7.2±2.8), (4.1±1.8), and (6.0±3.0) pg/mL, respectively; and the other 3 patients had no such statistical results. After admission, the number of surgical operation for patients was 3.4±0.9. The following methods were used for wound repair, including direct suturing in 4 cases and autologous skin and/or artificial dermis grafting in 9 cases, of which 2 cases underwent stage Ⅱ autologous skin grafting after artificial dermis grafting in stage Ⅰ, and 6 cases had pedicled retrograde island flap+autologous skin grafting. The wound healing was observed, showing that all directly sutured wounds healed well; the wounds in 6 cases of autologous skin and/or artificial dermis grafting healed well, and the wounds in 3 cases also healed well after the secondary skin grafting; the flaps in 4 cases survived well with the wounds in 2 cases with distal perforators flap arteries circumfluence obstacle of posterior leg healed after stage Ⅱ debridement and autologous skin grafting. The healing status of skin/flap donor sites was followed showing that the donor sites of medium-thickness skin grafts in the thigh of 4 cases were well healed after transplanted with autologous split-thickness grafts from scalp; the donor sites of medium-thickness skin grafts in 3 cases did not undergo split-thickness skin grafting, of which 2 cases had poor healing but healed well after secondary skin grafting 2 weeks after surgery; the donor sites of split-thickness skin grafts in the head of 2 patients healed well; and all donor sites of flaps healed well after autologous skin grafting. During follow-up of more than half a year, 3 gout patients were hospitalized again for surgical treatment due to gout stone rupture, 4 patients were hospitalized again for surgical treatment due to infection, and no recurrent infection was found in the rest of patients. Conclusions: The infected wounds in patients with iatrogenic Cushing's syndrome have poor ability to regenerate and are prone to repeated infection. Local wound treatment together with multidisciplinary comprehensive treatment should be performed to control infection and close wounds in a timely manner, so as to maximize the benefits of patients.
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Affiliation(s)
- S T Li
- Department of Burns and Plastic Surgery, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
| | - Y Lin
- Department of Burns and Plastic Surgery, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
| | - B X Ou
- Department of Burns and Plastic Surgery, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
| | - D E Liu
- Department of Burns and Plastic Surgery, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
| | - Q W Li
- Department of Burns and Plastic Surgery, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
| | - Y J Nong
- Department of Burns and Plastic Surgery, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
| | - S M Wu
- Department of Burns and Plastic Surgery, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
| | - Z X Qiu
- Department of Burns and Plastic Surgery, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
| | - Zhenxing Huang
- Department of Endocrinology, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
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13
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Wu SM, Wang YT, Xiao ST, Zhang YX, Tian G, Chen JB, Zhao XF, Janiak C, Shalom M, Bahnemann DW, Wang LY, Yang XY. Design and synthesis of TiO 2/C nanosheets with a directional cascade carrier transfer. Chem Sci 2022; 13:7126-7131. [PMID: 35799830 PMCID: PMC9214889 DOI: 10.1039/d2sc01872a] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [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: 03/31/2022] [Accepted: 05/09/2022] [Indexed: 11/21/2022] Open
Abstract
Directional charge transfer in TiO2 nanosheets is achieved by design of TiO2 lattice-Ti vacancy-interlayered sp2 carbon at the interface.
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Affiliation(s)
- Si-Ming Wu
- State Key Laboratory of Advanced Technology for Materials Synthesis, Processing & Shenzhen Research Institute & Joint Laboratory for Marine Advanced Materials in Pilot National Laboratory for Marine Science and Technology (Qingdao), Wuhan University of Technology, Wuhan, 430070, China
- School of Chemical Engineering and Technology, Sun Yat-sen University (Zhuhai), Zhuhai, 519000, China
| | - Yi-Tian Wang
- State Key Laboratory of Advanced Technology for Materials Synthesis, Processing & Shenzhen Research Institute & Joint Laboratory for Marine Advanced Materials in Pilot National Laboratory for Marine Science and Technology (Qingdao), Wuhan University of Technology, Wuhan, 430070, China
| | - Shi-Tian Xiao
- State Key Laboratory of Advanced Technology for Materials Synthesis, Processing & Shenzhen Research Institute & Joint Laboratory for Marine Advanced Materials in Pilot National Laboratory for Marine Science and Technology (Qingdao), Wuhan University of Technology, Wuhan, 430070, China
| | - Yan-Xiang Zhang
- State Key Laboratory of Advanced Technology for Materials Synthesis, Processing & Shenzhen Research Institute & Joint Laboratory for Marine Advanced Materials in Pilot National Laboratory for Marine Science and Technology (Qingdao), Wuhan University of Technology, Wuhan, 430070, China
| | - Ge Tian
- State Key Laboratory of Advanced Technology for Materials Synthesis, Processing & Shenzhen Research Institute & Joint Laboratory for Marine Advanced Materials in Pilot National Laboratory for Marine Science and Technology (Qingdao), Wuhan University of Technology, Wuhan, 430070, China
| | - Jiang-Bo Chen
- State Key Laboratory of Advanced Technology for Materials Synthesis, Processing & Shenzhen Research Institute & Joint Laboratory for Marine Advanced Materials in Pilot National Laboratory for Marine Science and Technology (Qingdao), Wuhan University of Technology, Wuhan, 430070, China
| | - Xiao-Fang Zhao
- State Key Laboratory of Advanced Technology for Materials Synthesis, Processing & Shenzhen Research Institute & Joint Laboratory for Marine Advanced Materials in Pilot National Laboratory for Marine Science and Technology (Qingdao), Wuhan University of Technology, Wuhan, 430070, China
| | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, Düsseldorf, Germany
| | - Menny Shalom
- Department of Chemistry and Ilse Katz Institute for Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Detlef W. Bahnemann
- Institut für Technische Chemie, Leibniz Universität Hannover, Callinstrasse 3, Hannover, D-30167, Germany
- Laboratory “Photoactive Nanocomposite Materials” (Director), Saint-Petersburg State University, Ulyanovskaya str. 1, Peterhof, Saint-Petersburg 198504, Russia
| | - Li-Ying Wang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, National Center for Magnetic Resonance in Wuhan, Wuhan Institute of Physics and Mathematics, Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan, 430071, China
| | - Xiao-Yu Yang
- State Key Laboratory of Advanced Technology for Materials Synthesis, Processing & Shenzhen Research Institute & Joint Laboratory for Marine Advanced Materials in Pilot National Laboratory for Marine Science and Technology (Qingdao), Wuhan University of Technology, Wuhan, 430070, China
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
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14
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Zhang YX, Wu SM, Tian G, Zhao XF, Wang LY, Yin YX, Wu L, Li QN, Zhang YX, Wu JS, Janiak C, Ozoemena KI, Shalom M, Yang XY. Titanium Vacancies in TiO 2 Nanofibers Enable Highly Efficient Photodriven Seawater Splitting. Chemistry 2021; 27:14142. [PMID: 34590741 DOI: 10.1002/chem.202103410] [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: 11/08/2022]
Abstract
Invited for the cover of this issue are Xiao-Yu Yang and co-workers at Wuhan University of Technology, Heinrich-Heine-Universität Düsseldorf, University of the Witwatersrand, and Ben-Gurion University of the Negev. The image depicts Ti vacancies in TiO2 as powerful drivers of photo- and photo-electrocatalytic seawater splitting for hydrogen production. Read the full text of the article at 10.1002/chem.202101817.
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Affiliation(s)
- Yan-Xiang Zhang
- State Key Laboratory of Advanced Technology for, Materials Synthesis and Processing &, School of Materials Science and Engineering &, NRC (Nanostructure Research Centre), Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Si-Ming Wu
- School of Chemical Engineering and Technology, Sun Yat-sen University (Zhuhai), Zhuhai, 519000, P. R. China.,School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA
| | - Ge Tian
- State Key Laboratory of Advanced Technology for, Materials Synthesis and Processing &, School of Materials Science and Engineering &, NRC (Nanostructure Research Centre), Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Xiao-Fang Zhao
- State Key Laboratory of Advanced Technology for, Materials Synthesis and Processing &, School of Materials Science and Engineering &, NRC (Nanostructure Research Centre), Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Li-Ying Wang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan, 430071, P. R. China
| | - Yi-Xia Yin
- State Key Laboratory of Advanced Technology for, Materials Synthesis and Processing &, School of Materials Science and Engineering &, NRC (Nanostructure Research Centre), Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Lu Wu
- Hubei Collaborative Innovation Center for, Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, P. R. China
| | - Qian-Ni Li
- Hubei Collaborative Innovation Center for, Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, P. R. China
| | - Yue-Xing Zhang
- Hubei Collaborative Innovation Center for, Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, P. R. China
| | - Jin-Song Wu
- State Key Laboratory of Advanced Technology for, Materials Synthesis and Processing &, School of Materials Science and Engineering &, NRC (Nanostructure Research Centre), Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, Düsseldorf, 40204, Germany
| | - Kenneth I Ozoemena
- Molecular Sciences Institute, School of Chemistry, University of the Witwatersrand, Johannesburg, 2050, South Africa
| | - Menny Shalom
- Department of Chemistry and Ilse Katz Institute for, Nanoscale Science and Technology, Ben-Gurion University of the Negev, Beer-Sheva, 8410501, Israel
| | - Xiao-Yu Yang
- State Key Laboratory of Advanced Technology for, Materials Synthesis and Processing &, School of Materials Science and Engineering &, NRC (Nanostructure Research Centre), Wuhan University of Technology, Wuhan, 430070, P. R. China.,School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA
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15
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Maas R, Lee S, Harakalova M, Goodyer WR, Doevendans PFM, Van Der Velden J, Asselbergs FW, Sluijter JPG, Wu SM, Buikema JB. Massive expansion of human induced pluripotent stem cells resulting in efficient biobanking and functional 3D tissue analysis of genetic cardiomyopathies. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.3191] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Introduction
Over the past decade, various protocols were established to ensure efficient differentiation of hiPSC into cardiomyocytes (CMs). A major limitation, however, remained the batch-to-batch variability of hiPSC-CM efficiency and cell number. Here, we suggest an approach in which concomitant GSK-3β inhibition and removal of cell-cell contact inhibition, resulted in a massive proliferative response of hiPSC-CMs1–3. This efficient method allows expansion and passaging of functional hiPSC-CMs, that routinely can be cryopreserved and subsequently used as a stable cell source for the downstream applications, such 3D in vitro models for the disease modelling of dilated cardiomyopathy (DCM). We focussed on the deletion of arginine 14 in the PLN gene (R14del), which is associated with severe heart failure in DCM patients, associated with arrhythmias, cardiac fibrosis and premature death.
Methods
Subsequent expansion of hiPSC-CM cultures is generally modest (<10 fold). Here, we describe a cost-effective strategy for massive expansion (up to 250-fold) of high-purity hiPSC-CMs relying on two aspects; 1) inhibition of cell-cell contact via low-density seeding and serial passaging in culture flask-format, 2)small molecular glycogen synthase kinase-3β inhibition with CHIR99021 (CHIR). Patient-specific hiPSC-CMs harbouring a PLNR14del mutation were generated and used for EHT formation and functional follow-up.
Results
We observed that proliferating hiPSC-CMs, especially within the first 2 passages, can routinely be cryopreserved and subsequently further expanded or utilized in downstream applications. Moreover, using this strategy, it is possible to produce ultimately >1 billion CMs within 3–5 weeks starting with one differentiation batch of day 11 hiPSC-CMs, without the need for cell sorting or selection. Expanded hiPSC-CMs retain their capacity to mature and allows fibrin-based engineered heart tissues (EHTs) formation. Previously expanded CMs from PLNR14del patient-specific hiPSC were used to generate EHT and displayed a reduced force phenotype (0.137±0.012 mN) vs healthy control (0.229±0.030 mN) and isogenic control (0.224±0.008 mN) in previously expanded CMs.
Conclusion
We provpresent a novel strategy for the massive expansion of functional hiPSC-CMs with concomitant GSK-3β inhibition and low cell density culture that ultimately generates up to a 250-fold increase in hiPSC-CM numbers. Expansion healthy control hiPSC-CMs does not limit the subsequent maturation process, and moreover cells remain fully functional such as required for downstream tissue engineering approaches. Therefore, CM expansion forms a well-controlled platform for upscaling hiPSC-CM production for functional 3-dimensionale PLN cardiac disease models, large drug screenings and multiple translational/regenerative applications.
Funding Acknowledgement
Type of funding sources: Foundation. Main funding source(s): PLN Foundation
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Affiliation(s)
- R Maas
- University Medical Center Utrecht, Utrecht, Netherlands (The)
| | - S Lee
- School of Medicine, Stanford, United States of America
| | - M Harakalova
- University Medical Center Utrecht, Utrecht, Netherlands (The)
| | - W R Goodyer
- School of Medicine, Stanford, United States of America
| | | | - J Van Der Velden
- Amsterdam UMC - Location VUmc, Physiology, Amsterdam, Netherlands (The)
| | - F W Asselbergs
- University Medical Center Utrecht, Utrecht, Netherlands (The)
| | - J P G Sluijter
- University Medical Center Utrecht, Utrecht, Netherlands (The)
| | - S M Wu
- School of Medicine, Stanford, United States of America
| | - J B Buikema
- University Medical Center Utrecht, Utrecht, Netherlands (The)
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16
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Zhang YX, Wu SM, Tian G, Zhao XF, Wang LY, Yin YX, Wu L, Li QN, Zhang YX, Wu JS, Janiak C, Ozoemena KI, Shalom M, Yang XY. Titanium Vacancies in TiO2 Nanofibers Enable Highly Efficient Photo-Driven Seawater Splitting. Chemistry 2021; 27:14202-14208. [PMID: 34379853 DOI: 10.1002/chem.202101817] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2021] [Indexed: 11/09/2022]
Abstract
Photo-driven seawater splitting is considered as one of the most promising techniques for sustainable hydrogen production. However, the high salinity of seawater would deactivate catalysts and consumes the photogenerated carriers. Metal vacancies in metal oxide semiconductors are critical to directed electron transfer and high salinity resistance, thus desirable but remains a challenge. We demonstrate a facile controllable calcination approach to synthesize TiO 2 nanofibers with rich Ti-vacancies with excellent photo/electro performances and long-time stability in photo-driven seawater splitting, including photocatalysis and photoelectrocatalysis. Experimental measurements and theoretical calculations reveal the formation of titanium vacancies, as well as its unidirectional electron trap and superior H + adsorption ability for efficient charge transfer and corrosion resistance of seawater. Therefore, the characteristics and mechanism have been proposed at an atomic-/nanoscale to clarify the generation of titanium vacancies and the corresponding interfacial electron transfer.
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Affiliation(s)
- Yan-Xiang Zhang
- Wuhan University of Technology, School of Materials and Science and Engineering, 122, Luoshi Road, 430070, Wuhan, CHINA
| | - Si-Ming Wu
- Sun Yat-Sen University, School of Chemical Engineering and Technology, 519000, Zhuhai, CHINA
| | - Ge Tian
- Wuhan University of Technology, School of Materials Science and Engineering, 122, Luoshi Road, 430070, Wuhan, CHINA
| | - Xiao-Fang Zhao
- Wuhan University of Technology, School of Materials and Science Engineering, 430070, Wuhan, CHINA
| | - Li-Ying Wang
- Chinese Academy of Sciences Wuhan Institute of Physics and Mathematics, State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, 430071, Wuhan, CHINA
| | - Yi-Xia Yin
- Wuhan University of Technology, School of Materials and Science Engineering, 122, Luoshi Road, 430070, Wuhan, CHINA
| | - Lu Wu
- Hubei University, College of Chemistry and Chemical Engineering, 430062, Wuhan, CHINA
| | - Qian-Ni Li
- Hubei University, College of Chemistry and Chemical Engineering, 430062, Wuhan, CHINA
| | - Yue-Xing Zhang
- Hubei University, College of Chemistry and Chemical Engineering, 430062, Wuhan, CHINA
| | - Jin-Song Wu
- Wuhan University of Technology, Nanostructure Research Centre, 430070, Wuhan, CHINA
| | - Christoph Janiak
- Heinrich-Heine-Universitat Dusseldorf, Institut for Anorganische Chemie and Strukturchemie, 40204, Düsseldorf, GERMANY
| | - Kenneth I Ozoemena
- University of the Witwatersrand, School of Chemistry, 2050, Johannesburg, SOUTH AFRICA
| | - Menny Shalom
- Ben-Gurion University of the Negev, Department of Chemistry and IIse Katz Institute, 8410501, Beer-Sheva, ISRAEL
| | - Xiao-Yu Yang
- Wuhan University of Technology, State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, 122, Luoshi Road, 445000, Wuhan, CHINA
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17
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Hu J, Lu Y, Liu XL, Janiak C, Geng W, Wu SM, Zhao XF, Wang LY, Tian G, Zhang Y, Su BL, Yang XY. Photoinduced Terminal Fluorine and Ti
3+
in TiOF
2
/TiO
2
Heterostructure for Enhanced Charge Transfer. CCS Chem 2020. [DOI: 10.31635/ccschem.020.202000305] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Affiliation(s)
- Jie Hu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070
- School of Materials Science and Engineering, Chongqing Jiaotong University, Chongqing 400074
| | - Yi Lu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070
- School of Chemical Engineering and Technology, School of Materials, Sun Yat-sen University,Zhuhai 519000
| | - Xiao-Long Liu
- School of Chemical Engineering and Technology, School of Materials, Sun Yat-sen University,Zhuhai 519000
| | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, Düsseldorf 40204
| | - Wei Geng
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070
- School of Chemical Engineering and Technology, School of Materials, Sun Yat-sen University,Zhuhai 519000
| | - Si-Ming Wu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070
| | - Xiao-Fang Zhao
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070
| | - Li-Ying Wang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071
| | - Ge Tian
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138
| | - Yuexing Zhang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062
| | - Bao-Lian Su
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070
- Laboratory of Inorganic Materials Chemistry (CMI), University of Namur, Namur B-5000,
| | - Xiao-Yu Yang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138
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18
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Lu Y, Liu XL, He L, Zhang YX, Hu ZY, Tian G, Cheng X, Wu SM, Li YZ, Yang XH, Wang LY, Liu JW, Janiak C, Chang GG, Li WH, Van Tendeloo G, Yang XY, Su BL. Spatial Heterojunction in Nanostructured TiO 2 and Its Cascade Effect for Efficient Photocatalysis. Nano Lett 2020; 20:3122-3129. [PMID: 32343586 DOI: 10.1021/acs.nanolett.9b05121] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
A highly efficient photoenergy conversion is strongly dependent on the cumulative cascade efficiency of the photogenerated carriers. Spatial heterojunctions are critical to directed charge transfer and, thus, attractive but still a challenge. Here, a spatially ternary titanium-defected TiO2@carbon quantum dots@reduced graphene oxide (denoted as VTi@CQDs@rGO) in one system is shown to demonstrate a cascade effect of charges and significant performances regarding the photocurrent, the apparent quantum yield, and photocatalysis such as H2 production from water splitting and CO2 reduction. A key aspect in the construction is the technologically irrational junction of Ti-vacancies and nanocarbons for the spatially inside-out heterojunction. The new "spatial heterojunctions" concept, characteristics, mechanism, and extension are proposed at an atomic-/nanoscale to clarify the generation of rational heterojunctions as well as the cascade electron transfer.
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Affiliation(s)
- Yi Lu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of materials science and engineering & School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) & School of Chemical Engineering and Technology, School of Materials, Sun Yat-sen University, Zhuhai 519000, China
| | - Xiao-Long Liu
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) & School of Chemical Engineering and Technology, School of Materials, Sun Yat-sen University, Zhuhai 519000, China
| | - Li He
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of materials science and engineering & School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China
| | - Yue-Xing Zhang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry-of-Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan 430062, China
| | - Zhi-Yi Hu
- Nanostructure Research Centre, Wuhan University of Technology, Wuhan 430070, China
- Electron Microscopy for Materials Science, University of Antwerp, Antwerpen B-2020, Belgium
| | - Ge Tian
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of materials science and engineering & School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China
| | - Xiu Cheng
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of materials science and engineering & School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China
| | - Si-Ming Wu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of materials science and engineering & School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) & School of Chemical Engineering and Technology, School of Materials, Sun Yat-sen University, Zhuhai 519000, China
| | - Yuan-Zhou Li
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of materials science and engineering & School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China
| | - Xiao-Hang Yang
- College of Chemistry, Jilin University, Changchun, 130023, China
| | - Li-Ying Wang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan 430071, China
| | - Jia-Wen Liu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of materials science and engineering & School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China
| | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, Düsseldorf 40204, Germany
| | - Gang-Gang Chang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of materials science and engineering & School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China
| | - Wei-Hua Li
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) & School of Chemical Engineering and Technology, School of Materials, Sun Yat-sen University, Zhuhai 519000, China
| | - Gustaaf Van Tendeloo
- Nanostructure Research Centre, Wuhan University of Technology, Wuhan 430070, China
- Electron Microscopy for Materials Science, University of Antwerp, Antwerpen B-2020, Belgium
| | - Xiao-Yu Yang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of materials science and engineering & School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) & School of Chemical Engineering and Technology, School of Materials, Sun Yat-sen University, Zhuhai 519000, China
- School of Engineering and Applied Sciences, Harvard University, Cambridge 02138, Massachusetts, United States
| | - Bao-Lian Su
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing & School of materials science and engineering & School of Chemistry, Chemical Engineering and Life Science, Wuhan University of Technology, Wuhan 430070, China
- Laboratory of Inorganic Materials Chemistry, University of Namur, Namur B-5000, Belgium
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19
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Wu J, Chang GG, Peng YQ, Ma XC, Ke SC, Wu SM, Xiao YX, Tian G, Xia T, Yang XY. Spatial acid–base–Pd triple-sites of a hierarchical core–shell structure for three-step tandem reaction. Chem Commun (Camb) 2020; 56:6297-6300. [DOI: 10.1039/d0cc01701a] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [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
We present a hierarchical single catalyst with spatial acid–base–Pd triple-sites showing high catalytic activity and stability for the three-step D–K–H tandem reaction.
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Affiliation(s)
- Jian Wu
- School of Chemistry
- Chemical Engineering and Life Science and State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Materials Science & Engineering
- Wuhan University of Technology
- Wuhan
- China
| | - Gang-Gang Chang
- School of Chemistry
- Chemical Engineering and Life Science and State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Materials Science & Engineering
- Wuhan University of Technology
- Wuhan
- China
| | - You-Qing Peng
- School of Chemistry
- Chemical Engineering and Life Science and State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Materials Science & Engineering
- Wuhan University of Technology
- Wuhan
- China
| | - Xiao-Chen Ma
- School of Chemistry
- Chemical Engineering and Life Science and State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Materials Science & Engineering
- Wuhan University of Technology
- Wuhan
- China
| | - Shan-Chao Ke
- School of Chemistry
- Chemical Engineering and Life Science and State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Materials Science & Engineering
- Wuhan University of Technology
- Wuhan
- China
| | - Si-Ming Wu
- School of Chemistry
- Chemical Engineering and Life Science and State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Materials Science & Engineering
- Wuhan University of Technology
- Wuhan
- China
| | - Yu-Xuan Xiao
- School of Chemistry
- Chemical Engineering and Life Science and State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Materials Science & Engineering
- Wuhan University of Technology
- Wuhan
- China
| | - Ge Tian
- School of Chemistry
- Chemical Engineering and Life Science and State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Materials Science & Engineering
- Wuhan University of Technology
- Wuhan
- China
| | - Tao Xia
- School of Chemistry
- Chemical Engineering and Life Science and State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Materials Science & Engineering
- Wuhan University of Technology
- Wuhan
- China
| | - Xiao-Yu Yang
- School of Chemistry
- Chemical Engineering and Life Science and State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Materials Science & Engineering
- Wuhan University of Technology
- Wuhan
- China
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20
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Seilheimer RL, Sabharwal J, Wu SM. Genetic dissection of rod and cone pathways mediating light responses and receptive fields of ganglion cells in the mouse retina. Vision Res 2019; 167:15-23. [PMID: 31887538 DOI: 10.1016/j.visres.2019.12.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [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: 11/12/2019] [Revised: 12/14/2019] [Accepted: 12/14/2019] [Indexed: 10/25/2022]
Abstract
Retinal ganglion cells (GCs) are important visual neurons which carry complex spatiotemporal information from the retina to higher visual centers in the brain. By taking advantage of pathway-specific knockout/mutant mice and multi-electrode array (MEA) recording techniques, we analyze contributions of rod and cone pathways to responsiveness, kinetics and receptive field profiles of GCs under scotopic and photopic conditions. Our data suggest: (1) Scotopic responses of some GCs require all three rod pathways, some require only the secondary and tertiary rod pathways, and others require only the tertiary rod pathway. (2) There are more responsive GCs in photopic conditions than responsive GCs in scotopic conditions. (3) Gap junctions slow down GCs' scotopic light responses and increase GCs' ratio of antagonistic to center inputs. (4) Cone pathways do not affect the kinetics but alter the ratio of antagonistic to center inputs of scotopic GC responses, and they speed up GCs photopic responses and alter the ratio of GCs' antagonistic to center synaptic inputs and receptive field profiles. (5) Rod bipolar cells shorten response latency of ON GCs and increase the ratio of GCs' antagonistic to center synaptic inputs. (6) Light adaptation speeds up GCs' temporal processing and tunes GC photopic responses to higher frequencies, and the tertiary rod pathway plays a significant role in adaptation-induced TTP changes in some GCs. (7) GC RF center sizes are partially mediated by AIIACs and GC-GC coupling. (8) Connexin36 gap junctions and cone pathways alter synaptic circuits underlying antagonistic surround inputs to GCs in photopic conditions.
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Affiliation(s)
- R L Seilheimer
- Cullen Eye Institute, Baylor College of Medicine, Houston, TX 77030, United States
| | - J Sabharwal
- Cullen Eye Institute, Baylor College of Medicine, Houston, TX 77030, United States
| | - S M Wu
- Cullen Eye Institute, Baylor College of Medicine, Houston, TX 77030, United States.
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21
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Liu H, Geng W, Jin CJ, Wu SM, Lu Y, Hu J, Yu HZ, Chang GG, Zhao T, Wan Y, Luo ZQ, Tian G, Yang XY. Corrigendum to “Silica coating with well-defined micro-nano hierarchy for universal and stable surface superhydrophobicity” [Chem. Phys. Lett. 730 (2019) 594–599]. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.136715] [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: 10/25/2022]
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22
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Liu H, Geng W, Jin CJ, Wu SM, Lu Y, Hu J, Yu HZ, Chang GG, Zhao T, Wan Y, Luo ZQ, Tian G, Yang XY. Silica coating with well-defined micro-nano hierarchy for universal and stable surface superhydrophobicity. Chem Phys Lett 2019. [DOI: 10.1016/j.cplett.2019.06.001] [Citation(s) in RCA: 5] [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: 11/26/2022]
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23
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Yu HZ, Wang Y, Ying J, Wu SM, Lu Y, Hu J, Hu JS, Shen L, Xiao YX, Geng W, Chang GG, Janiak C, Li WH, Yang XY. Hydrogen Evolution Enhancement over a Cobalt-Based Schottky Interface. ACS Appl Mater Interfaces 2019; 11:27641-27647. [PMID: 31252487 DOI: 10.1021/acsami.9b03368] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
A proof-of-concept strategy for significant enhancement of hydrogen evolution reaction (HER) performance of transition metals via construction of a metal/semiconductor Schottky junction is presented. The decoration of low-cost commercial TiO2 nanoparticles on the surface of microscale Co dendrites causes a significant charge transfer across the Co/TiO2 Schottky interface and enhances the local electron density at the Co surface, confirmed by X-ray photoelectron spectroscopy results and density functional theory calculations. The Co/TiO2 Schottky catalyst displays superior HER activity with a turnover frequency of 0.052 s-1 and an exchange current density of 79 μA cm-2, which are about 4.3 and 4.0 times greater than that of pristine Co, respectively. Moreover, the Co/TiO2 Schottky catalyst displays excellent electrochemical durability for long-term operation in both alkaline solution and high saline solution. Theoretical calculations suggest that the Schottky junction plays an important role to optimize hydrogen adsorption free energy (ΔGH*) by tuning the electronic structure, which enhances the performance for HER of the Co/TiO2 Schottky catalyst. This study of modulating the electronic structure of the catalysts via the Schottky junction could provide valuable insights for designing and synthesizing low-cost, high-performance electrocatalysts.
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Affiliation(s)
| | | | - Jie Ying
- School of Chemical Engineering and Technology , Sun Yat-sen University , Zhuhai 519082 , China
- Institut für Anorganische Chemie und Strukturchemie , Heinrich-Heine-Universität Düsseldorf , 40204 Düsseldorf , Germany
| | | | | | | | - Ji-Song Hu
- School of Science , Hubei University of Technology , Wuhan 430068 , China
| | | | | | | | | | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie , Heinrich-Heine-Universität Düsseldorf , 40204 Düsseldorf , Germany
| | - Wei-Hua Li
- School of Chemical Engineering and Technology , Sun Yat-sen University , Zhuhai 519082 , China
| | - Xiao-Yu Yang
- School of Engineering and Applied Sciences , Harvard University , Cambridge , Massachusetts 02138 , United States
- Southern Laboratory of Ocean Science and Engineering (Guangdong, Zhuhai) , Zhuhai 519000 , China
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24
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Cai DC, Pan C, Yu WH, Dang SS, Li J, Wu SM, Jiang N, Wang MR, Zhang ZH, Lin F, Xin SJ, Yang YF, Shen BS, Ren H. [Clinical effect and safety of 144-week treatment with entecavir capsules in treatment-naïve HBeAg-positive patients with chronic hepatitis B]. Zhonghua Gan Zang Bing Za Zhi 2019; 25:597-600. [PMID: 29056009 DOI: 10.3760/cma.j.issn.1007-3418.2017.08.008] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the clinical effect and safety of entecavir capsules in the treatment of treatment-naïve HBeAg-positive patients with chronic hepatitis B (CHB). Methods: A total of 158 HBeAg-positive CHB patients were given oral entecavir capsules at a dose of 0.5 mg/time once a day for 144 weeks. Clinical outcome and safety were evaluated at baseline and at 24, 48, 72, 96, 120, and 144 weeks of treatment respectively. The Fisher's exact test was used for the analysis of categorical data. Results: After 144 weeks of treatment, 90.91% of all patients achieved virologic response (< 69 IU/ml), the normalization rate of alanine aminotransferase was 88.18%, the clearance rate of HBeAg was 33.33%, and the seroconversion rate of HBeAg was 24.07%. Of all patients, 2 dropped out due to adverse events and 5 experienced serious adverse reactions. Conclusion: Entecavir capsules can inhibit viral replication and have good safety in treatment-naïve HBeAg-positive CHB patients.
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Affiliation(s)
- D C Cai
- The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
| | - C Pan
- Mengchao Hepatobiliary Hospital of Fujian Medical University, Fuzhou 350000, China
| | - W H Yu
- The Eighth People's Hospital of Guangzhou, Guangzhou 510060, China
| | - S S Dang
- The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710004, China
| | - J Li
- The Second People's Hospital of Tianjin, Tianjin 300192, China
| | - S M Wu
- Shanghai Public Health Clinical Center, Shanghai 201508, China
| | - N Jiang
- Sichuan Provincial People's Hospital, Chengdu 610772, China
| | - M R Wang
- No.81 Hospital of PLA, Nanjing 210002, China
| | - Z H Zhang
- Jinan Infectious Disease Hospital, Jinan 250021, China
| | - F Lin
- Hainan General Hospital, Haikou 570311, China
| | - S J Xin
- No.302 Hospital of PLA, Beijing 100039, China
| | - Y F Yang
- The Second Hospital of Nanjing, Nanjing 210003, China
| | - B S Shen
- The First Affiliated Hospital of Xinxiang Medical University, Xinxiang 453100, China
| | - H Ren
- The Second Affiliated Hospital of Chongqing Medical University, Chongqing 400010, China
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25
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26
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Xiao S, Lu Y, Li X, Xiao BY, Wu L, Song JP, Xiao YX, Wu SM, Hu J, Wang Y, Chang GG, Tian G, Lenaerts S, Janiak C, Yang XY, Su BL. Hierarchically Dual-Mesoporous TiO2
Microspheres for Enhanced Photocatalytic Properties and Lithium Storage. Chemistry 2018; 24:13246-13252. [DOI: 10.1002/chem.201801933] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 06/16/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Sa Xiao
- State Key Laboratory Advanced Technology for Materials Synthesis and Processing, and School of Materials Science & Engineering; Wuhan University of Technology; 122, Luoshi Road 430070 Wuhan China
| | - Yi Lu
- State Key Laboratory Advanced Technology for Materials Synthesis and Processing, and School of Materials Science & Engineering; Wuhan University of Technology; 122, Luoshi Road 430070 Wuhan China
| | - Xin Li
- State Key Laboratory Advanced Technology for Materials Synthesis and Processing, and School of Materials Science & Engineering; Wuhan University of Technology; 122, Luoshi Road 430070 Wuhan China
| | - Bing-Yu Xiao
- State Key Laboratory Advanced Technology for Materials Synthesis and Processing, and School of Materials Science & Engineering; Wuhan University of Technology; 122, Luoshi Road 430070 Wuhan China
| | - Liang Wu
- State Key Laboratory Advanced Technology for Materials Synthesis and Processing, and School of Materials Science & Engineering; Wuhan University of Technology; 122, Luoshi Road 430070 Wuhan China
| | - Jian-Ping Song
- State Key Laboratory Advanced Technology for Materials Synthesis and Processing, and School of Materials Science & Engineering; Wuhan University of Technology; 122, Luoshi Road 430070 Wuhan China
| | - Yu-Xuan Xiao
- State Key Laboratory Advanced Technology for Materials Synthesis and Processing, and School of Materials Science & Engineering; Wuhan University of Technology; 122, Luoshi Road 430070 Wuhan China
| | - Si-Ming Wu
- State Key Laboratory Advanced Technology for Materials Synthesis and Processing, and School of Materials Science & Engineering; Wuhan University of Technology; 122, Luoshi Road 430070 Wuhan China
| | - Jie Hu
- State Key Laboratory Advanced Technology for Materials Synthesis and Processing, and School of Materials Science & Engineering; Wuhan University of Technology; 122, Luoshi Road 430070 Wuhan China
| | - Yong Wang
- State Key Laboratory Advanced Technology for Materials Synthesis and Processing, and School of Materials Science & Engineering; Wuhan University of Technology; 122, Luoshi Road 430070 Wuhan China
| | - Gang-Gang Chang
- School of Chemistry, Chemical Engineering and Life Science; Wuhan University of Technology; 122, Luoshi Road 430070 Wuhan China
| | - Ge Tian
- State Key Laboratory Advanced Technology for Materials Synthesis and Processing, and School of Materials Science & Engineering; Wuhan University of Technology; 122, Luoshi Road 430070 Wuhan China
| | - Silvia Lenaerts
- Research Group of Sustainable Energy and Air Purification (DuEL); Department of Bioscience Engineering; University of Antwerp; Antwerp Belgium
| | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie; Heinrich-Heine-Universität Düsseldorf; 40204 Düsseldorf Germany
| | - Xiao-Yu Yang
- State Key Laboratory Advanced Technology for Materials Synthesis and Processing, and School of Materials Science & Engineering; Wuhan University of Technology; 122, Luoshi Road 430070 Wuhan China
- School of Engineering and Applied Sciences; Harvard University; Cambridge Massachusetts 02138 USA
| | - Bao-Lian Su
- State Key Laboratory Advanced Technology for Materials Synthesis and Processing, and School of Materials Science & Engineering; Wuhan University of Technology; 122, Luoshi Road 430070 Wuhan China
- Laboratory of Inorganic Materials Chemistry (CMI); University of Namur; 61, rue de Bruxelles 5000 Namur Belgium
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27
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Wu SM, Liu XL, Lian XL, Tian G, Janiak C, Zhang YX, Lu Y, Yu HZ, Hu J, Wei H, Zhao H, Chang GG, Van Tendeloo G, Wang LY, Yang XY, Su BL. Homojunction of Oxygen and Titanium Vacancies and its Interfacial n-p Effect. Adv Mater 2018; 30:e1802173. [PMID: 29947064 DOI: 10.1002/adma.201802173] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2018] [Revised: 05/12/2018] [Indexed: 06/08/2023]
Abstract
The homojunction of oxygen/metal vacancies and its interfacial n-p effect on the physiochemical properties are rarely reported. Interfacial n-p homojunctions of TiO2 are fabricated by directly decorating interfacial p-type titanium-defected TiO2 around n-type oxygen-defected TiO2 nanocrystals in amorphous-anatase homogeneous nanostructures. Experimental measurements and theoretical calculations on the cell lattice parameters show that the homojunction of oxygen and titanium vacancies changes the charge density of TiO2 ; a strong EPR signal caused by oxygen vacancies and an unreported strong titanium vacancies signal of 2D 1 H TQ-SQ MAS NMR are present. Amorphous-anatase TiO2 shows significant performance regarding the photogeneration current, photocatalysis, and energy storage, owing to interfacial n-type to p-type conductivity with high charge mobility and less structural confinement of amorphous clusters. A new "homojunction of oxygen and titanium vacancies" concept, characteristics, and mechanism are proposed at an atomic-/nanoscale to clarify the generation of oxygen vacancies and titanium vacancies as well as the interface electron transfer.
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Affiliation(s)
- Si-Ming Wu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122, Luoshi Road, Wuhan, 430070, China
| | - Xiao-Long Liu
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan, 430071, China
| | - Xi-Liang Lian
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122, Luoshi Road, Wuhan, 430070, China
| | - Ge Tian
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122, Luoshi Road, Wuhan, 430070, China
| | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie, Heinrich-Heine-Universität Düsseldorf, 40204, Düsseldorf, Germany
| | - Yue-Xing Zhang
- Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials, Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional Molecules, College of Chemistry and Chemical Engineering, Hubei University, Wuhan, 430062, China
| | - Yi Lu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122, Luoshi Road, Wuhan, 430070, China
| | - Hao-Zheng Yu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122, Luoshi Road, Wuhan, 430070, China
| | - Jie Hu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122, Luoshi Road, Wuhan, 430070, China
| | - Hao Wei
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122, Luoshi Road, Wuhan, 430070, China
| | - Heng Zhao
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122, Luoshi Road, Wuhan, 430070, China
| | - Gang-Gang Chang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122, Luoshi Road, Wuhan, 430070, China
| | - Gustaaf Van Tendeloo
- EMAT (Electron Microscopy for Materials Science), University of Antwerp, Groenenborgerlaan 171, B-2020, Antwerpen, Belgium
| | - Li-Ying Wang
- State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, The Chinese Academy of Sciences, Wuhan, 430071, China
| | - Xiao-Yu Yang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122, Luoshi Road, Wuhan, 430070, China
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA, 02138, USA
| | - Bao-Lian Su
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, 122, Luoshi Road, Wuhan, 430070, China
- Laboratory of Inorganic Materials Chemistry (CMI), University of Namur, 61, rue de Bruxelles, B-5000, Namur, Belgium
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28
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Affiliation(s)
- Darrel W Stafford
- Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - S M Wu
- Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - Thomas B Stanley
- Department of Biology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
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Dong Y, Chen SY, Lu Y, Xiao YX, Hu J, Wu SM, Deng Z, Tian G, Chang GG, Li J, Lenaerts S, Janiak C, Yang XY, Su BL. Hierarchical MoS2
@TiO2
Heterojunctions for Enhanced Photocatalytic Performance and Electrocatalytic Hydrogen Evolution. Chem Asian J 2018; 13:1609-1615. [DOI: 10.1002/asia.201800359] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2018] [Revised: 04/01/2018] [Indexed: 11/11/2022]
Affiliation(s)
- Yu Dong
- State Key Laboratory Advanced Technology for Materials Synthesis and Processing and School of Materials Science and Engineering; Wuhan University of Technology; 122 Luoshi Road Wuhan 430070 China
| | - Sheng-You Chen
- State Key Laboratory Advanced Technology for Materials Synthesis and Processing and School of Materials Science and Engineering; Wuhan University of Technology; 122 Luoshi Road Wuhan 430070 China
| | - Yi Lu
- State Key Laboratory Advanced Technology for Materials Synthesis and Processing and School of Materials Science and Engineering; Wuhan University of Technology; 122 Luoshi Road Wuhan 430070 China
| | - Yu-Xuan Xiao
- State Key Laboratory Advanced Technology for Materials Synthesis and Processing and School of Materials Science and Engineering; Wuhan University of Technology; 122 Luoshi Road Wuhan 430070 China
| | - Jie Hu
- State Key Laboratory Advanced Technology for Materials Synthesis and Processing and School of Materials Science and Engineering; Wuhan University of Technology; 122 Luoshi Road Wuhan 430070 China
| | - Si-Ming Wu
- State Key Laboratory Advanced Technology for Materials Synthesis and Processing and School of Materials Science and Engineering; Wuhan University of Technology; 122 Luoshi Road Wuhan 430070 China
| | - Zhao Deng
- State Key Laboratory Advanced Technology for Materials Synthesis and Processing and School of Materials Science and Engineering; Wuhan University of Technology; 122 Luoshi Road Wuhan 430070 China
| | - Ge Tian
- State Key Laboratory Advanced Technology for Materials Synthesis and Processing and School of Materials Science and Engineering; Wuhan University of Technology; 122 Luoshi Road Wuhan 430070 China
| | - Gang-Gang Chang
- State Key Laboratory Advanced Technology for Materials Synthesis and Processing and School of Materials Science and Engineering; Wuhan University of Technology; 122 Luoshi Road Wuhan 430070 China
| | - Jing Li
- The State Key Laboratory of Solid Lubrication; Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences; Lanzhou 730000 China
| | - Silvia Lenaerts
- Research Group of Sustainable Energy and Air Purification (DuEL), Department of Bioscience Engineering; University of Antwerp; Antwerp Belgium
| | - Christoph Janiak
- Institut für Anorganische Chemie und Strukturchemie; Heinrich-Heine-Universität Düsseldorf; 40204 Düsseldorf Germany
| | - Xiao-Yu Yang
- State Key Laboratory Advanced Technology for Materials Synthesis and Processing and School of Materials Science and Engineering; Wuhan University of Technology; 122 Luoshi Road Wuhan 430070 China
| | - Bao-Lian Su
- State Key Laboratory Advanced Technology for Materials Synthesis and Processing and School of Materials Science and Engineering; Wuhan University of Technology; 122 Luoshi Road Wuhan 430070 China
- Laboratory of Inorganic Materials Chemistry (CMI); University of Namur; 61 rue de Bruxelles 5000 Namur Belgium
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30
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Dong L, Shi YK, Xu JP, Zhang EY, Liu JC, Li YX, Ni YM, Yang Q, Han T, Fu B, Chen J, Ren L, Wei SL, Chen H, Liu KX, Yu FX, Liu JS, Xiao MD, Wu SM, Zhang KL, Huang HL, Jiang SL, Qiao CH, Wang CS, Xu ZY, Zhou XM, Wang DJ, Ni LX, Xiao YB, Jiang SL, Zhang GM, Liang GY, Yang SY, Bo P, Zhong QJ, Zhang JB, Zhang X, Zhu YB, Teng X, Zhu P, Huang F, Xiao YM, Cao GQ, Tian H, Xia LM, Lu FL, Liu YQ, Liu DX, Xu H, Yuan Y, Li M, Chang C, Wu XC, Xu Z, Guo P, Bai YJ, Xue WB, Jiang XY, Na ZH, Zeng QY, Cai H, Wang YL, Xiong R, Jin S, Zheng XM, Wu D. [The multicenter study on the registration and follow-up of low anticoagulation therapy for the heart valve operation in China]. Zhonghua Yi Xue Za Zhi 2017; 96:1489-94. [PMID: 27266493 DOI: 10.3760/cma.j.issn.0376-2491.2016.19.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
OBJECTIVE To investigate the optimal anticoagulation methods and monitoring strategy for Chinese patients undergoing heart valve replacement, which is potentially quite different from western populations. METHODS In this multicenter prospective cohort study, the anticoagulation and monitoring strategy data was acquired from 25 773 in-hospital patients in 35 medical centers and 20 519 patients in outpatient clinic in 11 medical centers from January 1st, 2011 to December 31th, 2015. RESULTS As for in-hospital patients, mean age of study population was (48.6±11.2) years old; main etiology of valve pathology was rheumatic (87.5%) origin among study cohort; 94.8% of study population received mechanical valve implantation; international normalized ratio (INR) monitoring (in all the study centers) and low-intensity anticoagulation strategy (31 hospitals chose target INR range of 1.5-2.5, and actual values of INR among 89.2% of 100 069 in-hospital monitoring samples were 1.5-2.5), with mean actual INR values of 1.84±0.53, and warfarin dosage of (2.82±0.93) mg/d were widely adopted among the study centers; strategies of in-hospital warfarin administration were similar in all the study centers; complication rates of low-intensity anticoagulation strategy were low in severe hemorrhage (0.02%), thrombosis (0.05%), and thromboembolism (0.05%) events, without anticoagulation-related death.As for 18 974 outpatient clinic patients, the follow-up rate was 92.47%, with a total of 30 012 patient-years (Pty). Anticoagulation-related morbidity and mortality rates were 0.67% and 0.15% Pty; major hemorrhage morbidity and mortality rates were 0.25% and 0.13% Pty; thromboembolism morbidity and mortality rates were 0.45% and 0.03% Pty.The mean dosage of warfarin daily dosage was (2.85±1.23) mg/d and INR value was 1.82±0.57.No significant regional difference in the intensity of anticoagulation therapy was noted during the study. CONCLUSIONS INR can be used as a normalized indicator for intensity of anticoagulation therapy in China.The optimal anticoagulation intensity with INR range from 1.5 to 2.5 is safe and effective for Chinese patients with heart valve replacement, and there is no significant regional difference in the intensity of anticoagulation therapy.
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Affiliation(s)
- L Dong
- Department of Cardiovascular Surgery, West China Hospital, Sichuan University, Chengdu 610041, China
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Hou JL, Gao ZL, Xie Q, Zhang JM, Sheng JF, Cheng J, Chen CW, Mao Q, Zhao W, Ren H, Tan DM, Niu JQ, Chen SJ, Pan C, Tang H, Wang H, Mao YM, Jia JD, Ning Q, Xu M, Wu SM, Li J, Zhang XX, Ji Y, Dong J, Li J. Tenofovir disoproxil fumarate vs adefovir dipivoxil in Chinese patients with chronic hepatitis B after 48 weeks: a randomized controlled trial. J Viral Hepat 2015; 22:85-93. [PMID: 25243325 DOI: 10.1111/jvh.12313] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Tenofovir disoproxil fumarate (TDF) has demonstrated long-term efficacy and a high barrier to resistance in multiple chronic hepatitis B (CHB) populations outside of China. This study aimed to evaluate the efficacy and safety of TDF compared with adefovir dipivoxil (ADV) in Chinese patients with CHB during 48 weeks of treatment (ClinicalTrial.gov number, NCT01300234). A Phase 3, multicentred, randomized, double-blind, controlled trial compared the efficacy and safety of TDF with ADV in Chinese patients with CHB. The primary endpoint was the proportion of patients with HBV DNA <400 copies/mL in each treatment group at Week 48, using an unpooled Z-test for superiority. Secondary endpoints included viral suppression, serologic response, histological improvement, normalization of alanine aminotransferase (ALT) levels and the emergence of resistance mutations. A total of 509 patients, 202 hepatitis B e antigen (HBeAg)-positive and 307 HBeAg-negative, with HBV DNA ≥10(5) copies/mL received either TDF 300 mg od or ADV 10 mg od. At Week 48, TDF demonstrated superior viral suppression compared with ADV in both HBeAg-positive (76.7% vs 18.2%, P < 0.0001) and HBeAg-negative (96.8% vs 71.2%, P < 0.0001) patients. The majority of patients in both treatment arms achieved ALT normalization (>85%). No resistance to TDF was observed. The frequency of adverse events was comparable between treatment arms (TDF 3.9% vs ADV 4.8%). In this double-blind, randomized, clinical trial, TDF demonstrated superiority over ADV with respect to viral suppression in Chinese patients with CHB at 48 weeks of treatment and without the development of resistance.
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Affiliation(s)
- J L Hou
- Department of Infectious Diseases and Hepatology Unit, Nanfang Hospital, Guangzhou, China
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Wang H, Ji YY, Yao GB, Ma XY, Xie Q, Pang HY, Wu SM, Li J, Chen CW, Xu XW, Gu EL. Two years efficiency of lamivudine and adefovir dipivoxil combined therapy in chronic hepatitis B patients. Eur Rev Med Pharmacol Sci 2013; 17:636-643. [PMID: 23543447] [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: 06/02/2023]
Abstract
BACKGROUND Lamivudine (LAM) and adefovir (ADV) are widely used in most Asian countries, though monotherapy is associated with the occurrence of resistance. AIM To evaluate the efficiency of LAM and ADV combined treatment of chronic hepatitis B patients with compensated cirrhosis. PATIENTS AND METHODS 206 eligible Chinese patients were randomly assigned in a 1:1 ratio to receive either LAM or ADV for the first 24 weeks. According to virologic response at 24 weeks, the patients either continued to monotherapy or switched to combined therapy for 48 weeks. After 48 weeks, all patients received LAM and ADV combined therapy for 96 weeks. RESULTS Serum HBV DNA levels significantly decreased in patients with ADV or LAM monotherapy and continuously reduced after the combined therapy. Serum ALT normalized rate were 88.24% and 81.37% at week 48, and 95.74% and 87.36% at week 96 in ADV and LAM group respectively, comparing to 60.78% and 56.73% in ADV and LAM groups at baseline. The accumulated virological breakthrough rate at week 48 and 96 was significantly higher in LAM group. CONCLUSIONS Both combination strategies were resulted in the long term virological, biochemical improvement in Chinese chronic hepatitis B patients with compensated cirrhosis.
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Affiliation(s)
- H Wang
- Division of Gastroenterology and Hepatology, Jing'an District Central Hospital, Shanghai, China.
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Abstract
We report the creation of a multiferroic field effect device with a BiFeO(3) (BFO) (antiferromagnetic-ferroelectric) gate dielectric and a La(0.7)Sr(0.3)MnO(3) (LSMO) (ferromagnetic) conducting channel that exhibits direct, bipolar electrical control of exchange bias. We show that exchange bias is reversibly switched between two stable states with opposite exchange bias polarities upon ferroelectric poling of the BFO. No field cooling, temperature cycling, or additional applied magnetic or electric field beyond the initial BFO polarization is needed for this bipolar modulation effect. Based on these results and the current understanding of exchange bias, we propose a model to explain the control of exchange bias. In this model the coupled antiferromagnetic-ferroelectric order in BFO along with the modulation of interfacial exchange interactions due to ionic displacement of Fe(3+) in BFO relative to Mn(3+/4+) in LSMO cause bipolar modulation.
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Affiliation(s)
- S M Wu
- Department of Physics, University of California, Berkeley, California 94720, USA.
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Wu SM, Cybart SA, Yu P, Rossell MD, Zhang JX, Ramesh R, Dynes RC. Reversible electric control of exchange bias in a multiferroic field-effect device. Nat Mater 2010; 9:756-61. [PMID: 20657590 DOI: 10.1038/nmat2803] [Citation(s) in RCA: 175] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/15/2009] [Accepted: 06/14/2010] [Indexed: 05/12/2023]
Abstract
Electric-field control of magnetization has many potential applications in magnetic memory storage, sensors and spintronics. One approach to obtain this control is through multiferroic materials. Instead of using direct coupling between ferroelectric and ferromagnetic order parameters in a single-phase multiferroic material, which only shows a weak magnetoelectric effect, a unique method using indirect coupling through an intermediate antiferromagnetic order parameter can be used. In this article, we demonstrate electrical control of exchange bias using a field-effect device employing multiferroic (ferroelectric/antiferromagnetic) BiFeO(3) as the dielectric and ferromagnetic La(0.7)Sr(0.3)MnO(3) as the conducting channel; we can reversibly switch between two distinct exchange-bias states by switching the ferroelectric polarization of BiFeO(3). This is an important step towards controlling magnetization with electric fields, which may enable a new class of electrically controllable spintronic devices and provide a new basis for producing electrically controllable spin-polarized currents.
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Affiliation(s)
- S M Wu
- Materials Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA.
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35
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Zhu RR, Qin LL, Wang M, Wu SM, Wang SL, Zhang R, Liu ZX, Sun XY, Yao SD. Preparation, characterization, and anti-tumor property of podophyllotoxin-loaded solid lipid nanoparticles. Nanotechnology 2009; 20:055702. [PMID: 19417361 DOI: 10.1088/0957-4484/20/5/055702] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
In an effort to develop an alternative formulation of podophyllotoxin suitable for drug release and delivery, podophyllotoxin-loaded solid lipid nanoparticles (PPT-SLNs) were constructed, characterized and examined for in vitro cytotoxicity and tumor inhibition. The SLNs were prepared by using a solvent emulsification-evaporation method, and their size was around 50 nm. TEM detection showed that the SLNs were homogeneous and spherical in shape, and differential scanning calorimetry (DSC) measurement revealed a new conformation of PPT-SLNs. An in vitro drug release study showed that PPT was released from the SLNs in a slow but time-dependent manner. Furthermore, the treatment of 293T and HeLa cells with PPT-SLNs demonstrated that PPT-SLNs were less toxic to normal cells and more effective in anti-tumor potency compared with unconjugated PPT. A colony forming efficiency assay showed an effective long-term cancer growth suppression of PPT-SLNs; in addition, they can also enhance the apoptotic and cellular uptake processes on tumor cells compared with PPT. These results collectively demonstrated that this SLN formulation has a potential application as an alternative delivery system for anti-tumor drugs.
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Affiliation(s)
- R R Zhu
- School of Life Science and Technology, Tongji University, Shanghai, People's Republic of China
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Chen CM, Ho YH, Wu SM, Chang GL, Lin CH. A new method for CE-EC determination of mercaptopurine (MP) in a PMMA biochip with on-chip gold nano-electrode ensemble (GNEE) working and decouple electrodes. J Nanosci Nanotechnol 2009; 9:718-722. [PMID: 19441378 DOI: 10.1166/jnn.2009.c010] [Citation(s) in RCA: 7] [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] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
This paper presents a new method for CE-EC determination of Mercaptopurine (MP), one of the most important medicines for inflammatory bowel disease (IBD) and acute lymphoblastic leukemia (ALL) treatment, in a PMMA-based microfluidic chip. A simple and reliable process for preparing the template of gold nanoelectrode ensemble (GNEE) and fabricating the integrated microfluidic chip is reported in the present study. The use of GNEE electrodes for both electric current decoupling and signal sensing in the proposed CE-EC chip not only enhances the signal response but also decreases the background noise during detection. Results show that a good detection limit of 100 nM for detecting mercaptopurine is achieved with the proposed method. In addition, the measured results also shows a good linear response between the detected CE-EC signals and the concentration of MP within the range of 100 nM-10 mM (R2 = 0.989). The proposed microchip device provides a novel and fast detection method for mercaptopurine analysis.
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Affiliation(s)
- C M Chen
- Institute of Biomedical Engineering, National Cheng Kung University Tainan, 701, Taiwan
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Wu SM, Lin HC, Yang WL. The effects of maternal Cd on the metallothionein expression in tilapia (Oreochromis mossambicus) embryos and larvae. Aquat Toxicol 2008; 87:296-302. [PMID: 18406477 DOI: 10.1016/j.aquatox.2008.02.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/09/2008] [Revised: 02/20/2008] [Accepted: 02/20/2008] [Indexed: 05/26/2023]
Abstract
The purpose of this study was to identify the factor(s) which would enhance the Cd resistance as assessed by the metallothionein (MT) expression in tilapia larvae. Larvae were collected from parents that were pretreated respectively with Cd or saline. At the end of the 12-week experiment, the hepatic MT and Cd contents in the breeding female fish were recorded. Our results indicated that a significant relationship between Cd and MT contents can be found in the offspring from the parent fish treated with Cd. However, the higher Cd resistance, Cd contents, and MT expression were limited to those larvae from parent fish bred within 4 weeks of the injection. By week 12, the Cd-treated fish still contained high levels of MT in their hepatic tissues. However, the MT and Cd contents in the larvae from these adult fish were not significantly different from those from the controls. In summary, we suggest that the higher Cd resistance of larvae from the egg stage was a result of the Cd contamination of the parent female, as evidenced by an increase in MT expression induced in tilapia embryos and larvae.
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Affiliation(s)
- S M Wu
- Department of Aquatic Biosciences, National Chiayi University, Chiayi 600, Taiwan.
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Cao J, Liao XL, Wu SM, Zhao P, Zhao LJ, Wu WB, Qi ZT. Selection of a phage-displayed peptide recognized by monoclonal antibody directed blocking the site of hepatitis C virus E2 for human CD81. J Microbiol Methods 2007; 68:601-4. [PMID: 17178166 DOI: 10.1016/j.mimet.2006.11.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2006] [Revised: 11/14/2006] [Accepted: 11/17/2006] [Indexed: 11/24/2022]
Abstract
The human CD81 (hCD81) molecule has been identified as a putative receptor for hepatitis C virus (HCV). HCV envelope glycoprotein 2 (E2) most likely plays a pivotal role in binding to host cells by interacting with the hCD81 molecule. In this study, a phage-displayed peptide library was used to select small peptides with anti-hCD81 monoclonal antibody JS-81. The output/input ratio of phages increased about 91 fold after the third round of selection. Eight of the 30 phage clones selected from the phage library showed specific binding to the anti-hCD81 by enzyme linked immunosorbent assay (ELISA). Competitive inhibition test further demonstrated that HCV E2 could significantly inhibit the binding of a positive phage clone to anti-hCD81 JS-81. Exogenous small peptide ATWVCGPCT contained by the positive phage clones showed aligned with the hCD81 sequence from 153-161 by sequence analyses. These results suggest that the selected ATWVCGPCT is a novel hCD81-like small peptide, which can block the binding site of HCV E2 for hCD81. It may be of further application on development of antiviral agents targeting the stage of HCV entry.
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Affiliation(s)
- J Cao
- Department of Microbiology, State Key Laboratory of Medical Immunology, Second Military Medical University, Shanghai 200433, China.
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Wu SM, Ho YC, Shih MJ. Effects of Ca2+ or Na+ on metallothionein expression in tilapia larvae (Oreochromis mossambicus) exposed to cadmium or copper. Arch Environ Contam Toxicol 2007; 52:229-34. [PMID: 17165107 DOI: 10.1007/s00244-006-0112-5] [Citation(s) in RCA: 3] [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] [Subscribe] [Scholar Register] [Received: 06/01/2006] [Accepted: 08/24/2006] [Indexed: 05/13/2023]
Abstract
The objectives of this study were to try to determine the reasons of the external Ca(2+) and Na(+) enhancement of Cd(2+) and Cu(2+) resistance in fish. Tilapia larvae at 3 days posthatch were exposed to (A) 0 (control), 40 microg/L Cd(2+), 40 microg/L Cd(2+) + 2 mM Ca(2+) (Cd/hyper-Ca), and 2 mM Ca(2+) or (B) 0 (control), 75 microg/L Cu(2+), 75 microg/L Cu(2+) + 0.52 mM Na(+) (Cu/hyper-Na), and 0.52 mM Na(+). After 48 hours, results indicated that (1) Cd/hyper-Ca and Cu/hyper-Na treatments showed decreased growth inhibition induced by the metals; (2) metal accumulation in Cd/hyper-Ca-treated larvae was lower compared with those exposed only to Cd; and (3) metallothionein (MT) expression was significantly higher in Cu/hyper-Na-treated larvae than in the group treated with Cu only. Taking all of this into account, either supplementary Ca(2+) or Na(+) in ambient water may help fish to maintain Ca(2+) or Na(+) homeostasis, which could decrease metal accumulation and its detrimental effects. Consequently, the fish increase MT expression and retard the growth inhibition caused by metals.
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Affiliation(s)
- S M Wu
- Department of Aquatic Biosciences, National Chiayi University, 300 University Road, Chiayi 600, Taiwan.
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40
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Wu SM, Deng AN. Effect of cadmium on hematological functions in tilapia (Oreochromis mossambicus). Bull Environ Contam Toxicol 2006; 76:891-8. [PMID: 16786462 DOI: 10.1007/s00128-006-1002-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/30/2005] [Accepted: 03/08/2006] [Indexed: 05/10/2023]
Affiliation(s)
- S M Wu
- Department of Aquatic Biosciences, National Chiayi University, Taiwan
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41
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Wu SM, Jong KJ, Lee YJ. Relationships among metallothionein, cadmium accumulation, and cadmium tolerance in three species of fish. Bull Environ Contam Toxicol 2006; 76:595-600. [PMID: 16688540 DOI: 10.1007/s00128-006-0961-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2005] [Accepted: 02/14/2006] [Indexed: 05/09/2023]
Affiliation(s)
- S M Wu
- Department of Aquatic Biosciences, National Chiayi University, 300 University Road, Chiayi, Taiwan
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42
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Wong WM, Xiao SD, Hu PJ, Wang WH, Gu Q, Huang JQ, Xia HHX, Wu SM, Li CJ, Chen MH, Cui Y, Lai KC, Hu WHC, Chan CK, Lam SK, Wong BCY. Standard treatment for Helicobacter pylori infection is suboptimal in non-ulcer dyspepsia compared with duodenal ulcer in Chinese. Aliment Pharmacol Ther 2005; 21:73-81. [PMID: 15644048 DOI: 10.1111/j.1365-2036.2004.02283.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.8] [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: 02/05/2023]
Abstract
BACKGROUND Recent studies suggest that the Helicobacter pylori eradication rate in patients with non-ulcer dyspepsia is lower when compared to patients with peptic ulcer diseases. AIM The aim of this study was to study the efficacy of triple therapy for H. pylori infection in patients with duodenal ulcer vs. patients with non-ulcer dyspepsia. METHODS A total of 582 Chinese patients with proven H. pylori infection were recruited to receive: omeprazole 20 mg, amoxicillin 1000 mg and clarithromycin 500 mg all given twice daily for 7 days (OCA regime). Endoscopy with rapid urease test, histology and culture were performed before treatment. Post-treatment H. pylori status was determined by (13)C-urea breath test. Metronidazole, clarithromycin and amoxicillin resistance was defined as minimum inhibitory concentration (MIC) of >8 microg/mL, >1 microg/mL and >1 microg/mL, respectively. RESULTS A significantly higher (intention-to-treat/per-protocol) eradication rate was found in patients with duodenal ulcer than those with non-ulcer dyspepsia (91/94% vs. 84/88% respectively, P = 0.011 and P = 0.016). Clarithromycin resistance rate was higher in patients with non-ulcer dyspepsia than those with duodenal ulcer (14% vs. 6%, P = 0.015). Clarithromycin resistance (40% vs. 5%, P < 0.001, OR 12, 95% CI: 5.7-24.3) and the diagnosis of non-ulcer dyspepsia (91% vs. 84%, P = 0.011, OR 2.0, 95% CI: 1.2-3.3) significantly affected the success of H. pylori eradication. CONCLUSION Clarithromycin resistance accounts for the significantly lower and suboptimal H. pylori eradication rate of OCA regimen in Chinese patients with non-ulcer dyspepsia compared to those with duodenal ulcer.
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Affiliation(s)
- W M Wong
- Department of Medicine, University of Hong Kong, Queen Mary Hospital, Hong Kong
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McKeever WF, Cerone LJ, Suter PJ, Wu SM. Family size, miscarriage-proneness, and handedness: tests of hypotheses of the developmental instability theory of handedness. Laterality 2004; 5:111-20. [PMID: 15513136 DOI: 10.1080/713754367] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The handedness theory of Yeo and Gangestad (1993) posits that moderate right-handedness is the modal manifestation of genetic handedness and that ''developmental instability'' produces deviations from modal handedness. It is also suggested (1) that sinistral parents may produce fewer offspring than do dextral parents; and (2) that sinistral mothers may be more prone to miscarriages than are dextral mothers. In line with these hypotheses, Gangestad et al. (1996) reported that a human leukocyte antigen (B8) was related to both left-handedness and to reduced offspring number in their study. They also found that left-handedness was related to the human leukocyte antigen DR3, and Yeo and Gangestad (1998) noted that this antigen has been found by Christiansen et al. (1996) to be associated with an increased risk of spontaneous abortion in women. We assessed the first hypothesis through a study of the family sizes of 2083 families with two right-handed parents and 502 families having one or more left-handed parents; we assessed the second hypothesis from miscarriage history data supplied by 300 dextral and 52 sinistral mothers. Results supported the developmental instability theory with respect to the hypothesis regarding family size, but not with respect to the hypothesis regarding miscarriage-proneness.
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Affiliation(s)
- W F McKeever
- Department of Psychology, University of Toledo, OH 43606, USA
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Abstract
BACKGROUND Despite substantial growth in the use of complementary medicine, no comprehensive national study has been undertaken of the naturopathic and Western herbal medicine component of the healthcare workforce in Australia. This study aimed to examine the nature of these practices and this currently unregulated workforce in Australia. METHODS A comprehensive survey questionnaire was developed in consultation with the profession and distributed nationally to all members of the naturopathic and Western herbal medicine workforce. RESULTS The practices of herbal medicine and naturopathy make up a sizeable component of the Australian healthcare sector, with approximately 1.9 million consultations annually and an estimated turnover of $AUD 85 million in consultations (excluding the cost of medicines). A large proportion of patients are referred to practitioners by word of mouth. Up to one third of practitioners work in multidisciplinary clinics with other registered sectors of the healthcare community. The number of adverse events associated with herbal medicines, nutritional substances and homoeopathic medicines recorded in Australia is substantial and the types of events reported are not trivial. Data suggest that practitioners will experience one adverse event every 11 months of full-time practice, with 2.3 adverse events for every 1000 consultations (excluding mild gastrointestinal effects). CONCLUSION These data confirm the considerable degree of utilisation of naturopathic and Western herbal medicine practitioners by the Australian public. However, there is a need to examine whether statutory regulation of practitioners of naturopathy and Western herbal medicine is required to better protect the public.
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Affiliation(s)
- A Bensoussan
- The Centre for Complementary Medicine Research, University of Western Sydney, Locked Bag 1797, Penrith South DC, NSW 1797, Australia.
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Wu SM, Jong KJ, Kuo SY. Effects of copper sulfate on ion balance and growth in tilapia larvae (Oreochromis mossambicus). Arch Environ Contam Toxicol 2003; 45:357-363. [PMID: 14674589 DOI: 10.1007/s00244-003-0122-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Newly hatched tilapia larvae were exposed to sublethal concentrations of Cu2+ (0, 30, 50, and 100 microg/L) and lethal concentrations of Cu2+ (200 and 400 microg/L) for 24-96 h. The interaction of the exposure dose and time was related to the Cu2+ accumulation rate, which showed a higher accumulation rate with sublethal concentrations of Cu2+ within 24 h compared to the other treatments. Furthermore, Cu2+ contents in the whole body of larvae significantly increased following Cu2+ exposure times up to 96 h. Cu2+ in the medium produced a dose-response effect on Na+ and K+ contents in larvae after 96 h of exposure time. Changes in Ca2+ contents statistically significantly decreased and were shown to be dose-responsive for larval exposure times exceeding 72 h. Changes of Ca2+ contents were more sensitive than those of Na+ and K+ with Cu2+ treatment of early larvae. Notably Na+ and K+ contents showed significant increases of 17-23% in larvae exposed to low concentrations of Cu2+ (30-50 microg/L) for 24-72 h as compared to control larvae. Cu2+ caused no significant effect on body Cl- content or osmolality except at 100 microg/L Cu2+ for 24 h in tilapia larvae as compared to the control. However, there was a restoration phenomenon in larvae exposed to 100 microg/L Cu2+ for longer than 72 h. The water content of larvae exposed to Cu2+ for 96 h significantly decreased. The yolk absorption rate of tilapia larvae was significantly suppressed when they were exposed to Cu2+ medium containing 30, 50, 100, 200, or 400 Cu2+ microg/L from 72 h post transfer. These results obviously show that larvae are sensitive to Cu2+ during early development.
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Affiliation(s)
- S M Wu
- Department of Aquatic Biosciences, National Chiayi University, 300 University Road, Chiayi 600, Taiwan, ROC.
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Wu SM, Ren QG, Zhou MO, Peng Q, Chen JY. Protoporphyrin IX production and its photodynamic effects on glioma cells, neuroblastoma cells and normal cerebellar granule cells in vitro with 5-aminolevulinic acid and its hexylester. Cancer Lett 2003; 200:123-31. [PMID: 14568165 DOI: 10.1016/s0304-3835(03)00271-4] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.7] [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: 11/27/2022]
Abstract
5-Aminolevulinic acid (ALA) has shown promising in photodynamic detection and therapy of brain tumor. However, the knowledge on selective accumulation of ALA-induced protoporphyrin IX (PpIX) in brain tumor tissue is still fragment. In the present study, the rat C6 glioma cells, human SK-N-SH neuroblastoma cells, and rat normal cerebellar granule cells (RCG) were used to investigate the PpIX production and photocytotoxicity in vitro. The C6 cells and SK-N-SH cells showed a similar kinetics of PpIX accumulation after exposure to ALA or ALA hexyl ester (ALA-H), with an initial increase up to 6-8 h and then saturated. In the case of RCG cells, the PpIX accumulation slowly increased until 12 h studied. However the cellular PpIX content was more than 10 times higher in the C6 and SK-N-SH cells than that in the normal RCG cells. The intracellular localization of PpIX measured by cofocal laser scanning microscopy was in same pattern in the C6 glioma cells and RCG normal cells with a diffuse cytoplasm distribution. The sensitivity of the C6 cells and SK-N-SH cells to ALA or ALA-H PDT was similar. It appears that ALA-H could achieve similar or slightly better results than ALA with respect to PpIX production and photoinactivation of cells, although a 10 times lower concentration of ALA-H was used.
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Affiliation(s)
- S M Wu
- Department of Physics, Fudan University, Shanghai 200433, China
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47
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Abstract
The human CD81 (hCD81) molecule has been identified as a putative receptor for hepatitis C virus (HCV). In this study, eukaryotic expression vector pCDM8-hCD81 containing hCD81 cDNA and pSV2neo helper plasmid was used to cotransfect with lipofectamine into murine fibroblast cell line NIH/3T3 to establish an hCD81-expressing cell line. Resistant cell clones were obtained 20 days after the selection with neomycin (600 micro/ml) and then cultured as monoclones. The expression of the transfected hCD81 gene in the cells was verified by RT-PCR and flow cytometry analyses. One of the selected cell clones showed obvious expression of hCD81 and was named NIH/3T3-hCD81. Competitive inhibition tests indicated that the binding of monoclonal anti-hCD81 (JS-81) to NIH/3T3-hCD81 cells was inhibited by recombinant HCV E2 protein, suggesting that the expressed hCD81 molecules on NIH/3T3-hCD81 cells maintain natural conformation of binding to HCV E2. The transfected NIH/3T3-hCD81 cells should be of great potential value in studies on HCV attachment and onset of infection.
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Affiliation(s)
- J Cao
- Department of Microbiology, Second Military Medical University, Shanghai 200433, China
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Wu SM, Shau YW, Chong FC, Hsieh FJ. Non-invasive assessment of arterial distension waveforms using gradient-based hough transform and power Doppler ultrasound imaging. Med Biol Eng Comput 2001; 39:627-32. [PMID: 11804167 DOI: 10.1007/bf02345433] [Citation(s) in RCA: 11] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The peripheral arterial vessel often appears as an elliptic shape under the constraints of the surrounding tissues. In this study, the gradient-based Hough transform was used to detect the central location of the ellipse and the lumen area of the arterial vessel non-invasively using power Doppler imaging. Sequential ultrasound images were used to construct arterial distension waveforms in both the major- and minor-axis directions for a few cardiac cycles. The common carotid arteries (CCAs) for nine healthy male volunteers (mean age 24 years), in the sitting position, were investigated in vivo. The CCAs (n = 9) had a mean diameter of 5.83mm, and the pulsatile diameter distension was 13.7+/-1.9%. The brachial artery and dorsalis pedis artery for five healthy male volunteers (mean age 26 years), in the supine position, had mean diameters of 4.03mm and 2.83mm and distensions of 16.7+/-4.6% and 15.5+/-5.4%, respectively. The movement of the arterial centre location during the cardiac cycle reflected the asymmetry of the reaction forces produced by the surrounding soft tissues. The present method can obtain the response of vessel distension to pulse pressure, as well as the constrained conditions of the arteries.
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Affiliation(s)
- S M Wu
- College of Electrical Engineering, Biomedical Engineering, National Taiwan University, Taipei
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Sandrini F, Farmakidis C, Kirschner LS, Wu SM, Tullio-Pelet A, Lyonnet S, Metzger DL, Bourdony CJ, Tiosano D, Chan WY, Stratakis CA. Spectrum of mutations of the AAAS gene in Allgrove syndrome: lack of mutations in six kindreds with isolated resistance to corticotropin. J Clin Endocrinol Metab 2001; 86:5433-7. [PMID: 11701718 DOI: 10.1210/jcem.86.11.8037] [Citation(s) in RCA: 39] [Impact Index Per Article: 1.7] [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: 02/10/2023]
Abstract
Familial glucocorticoid deficiency due to corticotropin (ACTH) resistance consists of two distinct genetic syndromes that are both inherited as autosomal recessive traits: isolated ACTH resistance (iACTHR), which may be caused by inactivating mutations of the ACTH receptor (the MC2R gene) or mutations in an as yet unknown gene(s), and Allgrove syndrome (AS). The latter is also known as triple-A syndrome (MIM 231550). In three large cohorts of AS kindreds, the disease has been mapped to chromosome 12; most recently, mutations in the AAAS gene on 12q13 were found in these AS families. AAAS codes for the WD-repeat containing ALADIN (for alacrima-achalasia-adrenal insufficiency-neurologic disorder) protein. We investigated families with iACTHR (n = 4) and AS (n = 6) and a Bedouin family with ACTHR and a known defect of the TSH receptor. Four AS families were of mixed extraction from Puerto Rico (PR); most of the remaining six families were Caucasian families from North America (NA). Sequencing analysis found no MC2R genetic defects in any of the kindreds. No iACTHR kindreds, but all of AS families, had AAAS mutations. The previously reported IVS14+1G-->A splice donor mutation was found in all PR families, apparently due to a founder effect; one NA kindred was heterozygous for this mutation. In the latter family, long-range PCR failed to identify a deletion or other rearrangements of the AAAS gene. No other heterozygote or transmitting parent had any phenotype that could be considered part of AS. The IVS14+1G-->A mutation results in a premature termination of the predicted protein; although it was present in all PR families (in the homozygote state in three of them), there was substantial clinical variation between them. One PR family also carried a novel splice donor mutation of the AAAS gene in exon 11, IVS11+1G-->A; the proband was a compound heterozygote. A novel point mutation, 43C-->A(Gln15Lys), in exon 1 of the AAAS gene was identified in the homozygote state in a Canadian AS kindred with a milder AS phenotype. The predicted amino acid substitution in this family is located in a sequence that may participate in the preservation of stability of ALADIN beta-strands, whereas the splicing mutation in exon 11 may interfere with the formation of WD repeats in this molecule. We conclude that 1) AAAS does not appear to be frequently mutated in families with iACTHR; 2) AAAS is mutated in AS families from PR (that had previously been mapped to 12q13) and NA; and, 3) there is significant clinical variability between patients with the same AAAS defect.
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Affiliation(s)
- F Sandrini
- Unit on Genetics and Endocrinology, Developmental Endocrinology Branch, National Institute of Child Health and Human Development, National Institutes of Health, Bethesda, Maryland 20892, USA
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50
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Abstract
Glutamate and kainate-induced currents of primate ganglion cells were studied using the whole-cell patch-clamp technique in a retinal slice preparation. Antagonists and allosteric modulators of desensitization selective for either alpha-amino-3-hydroxy-5-methyl-4-isoazoleprionic acid (AMPA)- or kainate-preferring receptors were used to determine the contributions of each type of receptor to excitatory responses. With synaptic transmission and NMDA receptors blocked, the AMPA-preferring receptor antagonist GYKI 52466 (30 microM-100 microM) reversibly blocked most of the glutamate-induced current in ganglion cells. GYKI 52466 also blocked the response in ganglion cells to focally applied kainate, suggesting that the current response to kainate arises from activation of AMPA-preferring receptors, and not kainate-preferring receptors. Both cyclothiazide (10 microM-100 microM) and the novel drug 4-[2-(phenylsulfonylamino)ethylthio]-2,6-difluoro-phenoxyacetamide (PEPA, 20 microM-100 microM), which selectively enhance responses mediated by AMPA-preferring receptors, enhanced glutamate-induced responses of ganglion cells. Since these drugs preferentially inhibit desensitization of the flip and flop splice variants, respectively, of AMPA-preferring receptors, it is likely that both splice variants are present on these ganglion cells. Concanavalin A, which selectively suppresses the desensitization of kainate-preferring receptors, had no effect on the glutamate-induced responses of ganglion cells. We conclude that the non-NMDA component of the excitatory, glutamatergic input to primate ganglion cells is mediated largely by AMPA-preferring receptors, with little, if any, kainate-preferring receptor-mediated response.
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Affiliation(s)
- R A Jacoby
- Department of Opthalmology, Cullen Eye Institute, Baylor College of Medicine, Houston, TX 77030, USA.
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