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Fu B, Guan Y, Yuan W, Geng J, Hao Z, Ruan Z, Sun S, Zhang Y, Xiong W, Gao L, Chen Y, Ji W, Lu J, Cai J. Modulation of supramolecular structure by stepwise removal of tert-butyl groups from tetraazaperopyrene derivatives on Ag(111). J Chem Phys 2024; 160:134308. [PMID: 38568943 DOI: 10.1063/5.0196443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2024] [Accepted: 03/04/2024] [Indexed: 04/05/2024] Open
Abstract
Tert-butyl functional groups can modulate the self-assembly behavior of organic molecules on surfaces. However, the precise construction of supramolecular architectures through their controlled thermal removal remains a challenge. Herein, we precisely controlled the removal amount of tert-butyl groups in tetraazaperopyrene derivatives by stepwise annealing on Ag(111). The evolution of 4tBu-TAPP supramolecular self-assembly from the grid-like structure composed of 3tBu-TAPP through the honeycomb network formed by 2tBu-TAPP to the one-dimensional chain co-assembled by tBu-TAPP and TAPP was successfully realized. This series of supramolecular nanostructures were directly visualized by high resolution scanning tunneling microscopy. Tip manipulation and density functional theory calculations show that the formation of honeycomb network structure can be attributed to the van der Waals interactions, N-Ag-N coordination bonds, and weak C-H⋯N hydrogen bonds. Further addition of two tert-butyl groups (6tBu-TAPP) leads to a completely different assembly evolution, due to the fact that the additional tert-butyl groups affect the molecular adsorption behavior and ultimately induce desorption. This work can possibly be exploited in constructing stable and long-range ordered nanostructures in surface-assisted systems, which can also promote the development of nanostructures in functional molecular devices.
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Affiliation(s)
- Boyu Fu
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, No. 68 Wenchang Road, Kunming 650093, China
| | - Yurou Guan
- Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-Nano Devices, Department of Physics, Renmin University of China, Beijing 100872, People's Republic of China
- Key Laboratory of Quantum State Construction and Manipulation (Ministry of Education), Renmin University of China, Beijing 100872, China
| | - Wei Yuan
- College of Chemistry, Jilin University, No. 2699 Qianjin Street, Jilin 130012, China
| | - Jianqun Geng
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, No. 68 Wenchang Road, Kunming 650093, China
| | - Zhenliang Hao
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, No. 68 Wenchang Road, Kunming 650093, China
| | - Zilin Ruan
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, No. 68 Wenchang Road, Kunming 650093, China
| | - Shijie Sun
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, No. 68 Wenchang Road, Kunming 650093, China
| | - Yong Zhang
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, No. 68 Wenchang Road, Kunming 650093, China
| | - Wei Xiong
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, No. 68 Wenchang Road, Kunming 650093, China
| | - Lei Gao
- Faculty of Science, Kunming University of Science and Technology, No. 727 Jingming South Road, Kunming 650500, China
| | - Yulan Chen
- College of Chemistry, Jilin University, No. 2699 Qianjin Street, Jilin 130012, China
| | - Wei Ji
- Beijing Key Laboratory of Optoelectronic Functional Materials & Micro-Nano Devices, Department of Physics, Renmin University of China, Beijing 100872, People's Republic of China
- Key Laboratory of Quantum State Construction and Manipulation (Ministry of Education), Renmin University of China, Beijing 100872, China
| | - Jianchen Lu
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, No. 68 Wenchang Road, Kunming 650093, China
| | - Jinming Cai
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, No. 68 Wenchang Road, Kunming 650093, China
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Ruan Z, Schramm J, Bauer JB, Naumann T, Bettinger HF, Tonner-Zech R, Gottfried JM. Synthesis of Tridecacene by Multistep Single-Molecule Manipulation. J Am Chem Soc 2024; 146:3700-3709. [PMID: 38216144 PMCID: PMC10870776 DOI: 10.1021/jacs.3c09392] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2023] [Revised: 12/23/2023] [Accepted: 12/27/2023] [Indexed: 01/14/2024]
Abstract
Acenes represent a unique class of polycyclic aromatic hydrocarbons that have fascinated chemists and physicists due to their exceptional potential for use in organic electronics. While recent advances in on-surface synthesis have resulted in higher acenes up to dodecacene, a comprehensive understanding of their fundamental properties necessitates their expansion toward even longer homologues. Here, we demonstrate the on-surface synthesis of tridecacene via atom-manipulation-induced conformational preparation and dissociation of a trietheno-bridged precursor on a Au(111) surface. The generated tridecacene has been investigated by scanning tunneling microscopy and spectroscopy (STM/STS), combined with first-principles calculations. We observe that the STS transport gap (1.09 eV) shrinks again following the gap reopening of dodecacene (1.4 eV). Spin-polarized density functional theory calculations confirm an antiferromagnetic open-shell ground-state electronic configuration for tridecacene in the gas phase. Interestingly, tridecacene's open-shell character is significantly reduced upon interaction with the Au(111) surface despite being only physisorbed. The interaction with the surface leads to a lowering of the magnetization of tridecacene, a reduced gap between the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO), compared to the gas phase, and a reduced relative energy to the nonmagnetic state, making it nearly isoenergetic. These observations show qualitatively that the influence of the Au(111) substrate on the properties of long acenes is significant, which is important for interpreting the measured STS transport gaps. Our work contributes to a fundamental understanding of the electronic properties of long acenes, confirming a nonmonotonous length-dependent HOMO-LUMO gap, and to the development of multistep tip-assisted synthesis of elusive compounds.
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Affiliation(s)
- Zilin Ruan
- Fachbereich
Chemie, Philipps-Universität Marburg, Hans-Meerwein-Str. 4, 35032 Marburg, Germany
| | - Jakob Schramm
- Universität
Leipzig, Fakultät für Chemie und Mineralogie, Wilhelm-Ostwald-Institut für Physikalische
und Theoretische Chemie, Linnéstraße 2, 04103 Leipzig, Germany
| | - John B. Bauer
- Institut
für Organische Chemie, Universität
Tübingen, Auf
der Morgenstelle 18, 72076 Tübingen, Germany
| | - Tim Naumann
- Fachbereich
Chemie, Philipps-Universität Marburg, Hans-Meerwein-Str. 4, 35032 Marburg, Germany
| | - Holger F. Bettinger
- Institut
für Organische Chemie, Universität
Tübingen, Auf
der Morgenstelle 18, 72076 Tübingen, Germany
| | - Ralf Tonner-Zech
- Universität
Leipzig, Fakultät für Chemie und Mineralogie, Wilhelm-Ostwald-Institut für Physikalische
und Theoretische Chemie, Linnéstraße 2, 04103 Leipzig, Germany
| | - J. Michael Gottfried
- Fachbereich
Chemie, Philipps-Universität Marburg, Hans-Meerwein-Str. 4, 35032 Marburg, Germany
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3
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Zhang Y, Lu J, Zhou H, Zhang G, Ruan Z, Zhang Y, Zhang H, Sun S, Niu G, Fu B, Yang B, Chen L, Gao L, Cai J. Highly Regioselective Cyclodehydrogenation of Diphenylporphyrin on Metal Surfaces. ACS Nano 2023; 17:13575-13583. [PMID: 37417802 DOI: 10.1021/acsnano.3c02204] [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: 07/08/2023]
Abstract
Exploring the effect of porphin tautomerism on the regioselectivity of its derivatives is a big challenge, which is significant for the development and application of porphyrin drugs. In this work, we demonstrate the regioselectivity of 2H-diphenylporphyrin (H2-DPP) in the planarization reaction on Au(111) and Ag(111) substrates. H2-DPP monomer forms two configurations (anti- and syn-) via a dehydrogenation coupling, between which the yield of the anti-configuration exceeds 90%. Using high-resolution scanning tunneling microscopy, we visualize the reaction processes from the H2-DPP monomer to the final two planar products. Combined with DFT calculations of the potential reaction pathway and comparative experiments on Au(111) and Ag(111) substrates. Using M-DPP (M = Cu and Fe), we confirm that the regioselectivity of H2-DPP is derived from the reaction energy barrier during the cyclodehydrogenation reaction of different tautomers. This work reveals the regioselectivity mechanism of H2-DPP on the atomic scale, which holds great significance for understanding the chemical conversion process of organic macrocyclic molecules.
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Affiliation(s)
- Yong Zhang
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
| | - Jianchen Lu
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
| | - Hangjing Zhou
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
| | - Guang Zhang
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Science, Tianjin University, Tianjin 300072, China
| | - Zilin Ruan
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
| | - Yi Zhang
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
| | - Hui Zhang
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
| | - Shijie Sun
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
| | - Geifei Niu
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
| | - Boyu Fu
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
| | - Bing Yang
- CAS Key Laboratory of Science and Technology on Applied Catalysis, Dalian Institute of Chemical Physics, the Chinese Academy of Sciences, Dalian 116023, China
| | - Long Chen
- Department of Chemistry, Tianjin Key Laboratory of Molecular Optoelectronic Science, Tianjin University, Tianjin 300072, China
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
| | - Lei Gao
- Faculty of Science, Kunming University of Science and Technology, Kunming 650500, China
| | - Jinming Cai
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
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Niu G, Geng J, Wang X, Yang X, Xiong W, Zhang H, Ruan Z, Zhang Y, Gao L, Lu J, Cai J. Adsorption configurations and electronic properties of self-assembled C60 and C70 molecules on a semiconductor CuSe monolayer with periodic nanopores. Nanotechnology 2023. [PMID: 37343548 DOI: 10.1088/1361-6528/ace05b] [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: 06/23/2023]
Abstract
Two-dimensional (2D) supramolecular self-assembly architectures are being considered as one of the most significant and challenging topics in nanotechnology and modern organic chemistry. The study of these processes on surfaces is a vital approach to achieve a higher degree of control in the design of supramolecular architecture. Herein, we report the 2D self-assembly monolayer architectures based on C60 and C70 molecules on a semiconductor CuSe monolayer with periodic nanopores, which is indispensable for providing ideas for the surface template chemistry. With the aid of low-temperature scanning tunneling microscopy/ spectroscopy (LT-STM/STS) and density-functional theory (DFT) calculation methods, we systematically investigate the adsorption configurations and electronic properties of C60 and C70 on the CuSe monolayer with periodic nanopores. Our results show that the both C60 and C70 molecules above the nanopores will fall into the nanopores, while on the CuSe surface will show well-defined self-assembly with various adsorption configurations. Besides, through STS measurement, the lowest unoccupied molecular orbitals (LUMOs) and characteristic peaks of fullerene molecules will be slightly different due to different adsorption configurations. This work helps to study the adsorption behavior of the fullerene family on kinds of semiconductor substrates, and also provides vigorous support for the development of fullerene electrical devices in the future.
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Affiliation(s)
- Gefei Niu
- Kunming University of Science and Technology, Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China, Kunming, 650093, CHINA
| | - Jianqun Geng
- Kunming University of Science and Technology, Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China, Kunming, 650093, CHINA
| | - Xingyue Wang
- Kunming University of Science and Technology, Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China, Kunming, 650093, CHINA
| | - Xiaotian Yang
- Kunming University of Science and Technology, Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China, Kunming, 650093, CHINA
| | - Wei Xiong
- Kunming University of Science and Technology, Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China, Kunming, 650093, CHINA
| | - Hui Zhang
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China, Kunming, Yunnan, 650093, CHINA
| | - Zilin Ruan
- Kunming University of Science and Technology, Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China, Kunming, 650093, CHINA
| | - Yong Zhang
- Kunming University of Science and Technology, Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China, Kunming, 650093, CHINA
| | - Lei Gao
- Kunming University of Science and Technology, Faculty of Science, Kunming University of Science and Technology, No. 727 Jingming South Road, Kunming 650500, China, Kunming, 650093, CHINA
| | - Jianchen Lu
- Kunming University of Science and Technology, Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China, Kunming, 650093, CHINA
| | - Jinming Cai
- Kunming University of Science and Technology, Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China, Kunming, 650093, CHINA
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Zhang Y, Lu J, Li B, Chen W, Xiong W, Ruan Z, Zhang H, Sun S, Chen L, Gao L, Cai J. On-surface synthesis and characterization of nitrogen-doped covalent-organic frameworks on Ag(111) substrate. J Chem Phys 2022; 157:031103. [DOI: 10.1063/5.0099995] [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: 11/14/2022] Open
Abstract
Atomically precise fabrication of covalent-organic frameworks with well-defined heteroatom-dopant sites and further understanding of their electronic properties at the atomic level remain a challenge. Herein, we demonstrate the bottom-up synthesis of well-organized covalent-organic frameworks doped by nitrogen atoms on an Ag(111) substrate. Using high-resolution scanning tunneling microscopy and non-contact atomic force microscopy, the atomic structures of the intermediate metal–organic frameworks and the final covalent-organic frameworks are clearly identified. Scanning tunneling spectroscopy characterization reveals that the electronic bandgap of the as-formed N-doped covalent-organic framework is 2.45 eV, in qualitative agreement with the theoretical calculations. The calculated band structure together with the projected density of states analysis clearly unveils that the incorporation of nitrogen atoms into the covalent-organic framework backbone will remarkably tune the bandgap owing to the fact that the foreign nitrogen atom has one more electron than the carbon atom. Such covalent-organic frameworks may offer an atomic-scale understanding of the local electronic structure of heteroatom-doped covalent-organic frameworks and hold great promise for all relevant wide bandgap semiconductor technologies, for example, electronics, photonics, high-power and high-frequency devices, and solar energy conversion.
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Affiliation(s)
- Yong Zhang
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, No. 68 Wenchang Road, Kunming 650093, China
| | - Jianchen Lu
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, No. 68 Wenchang Road, Kunming 650093, China
| | - Baijin Li
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, No. 68 Wenchang Road, Kunming 650093, China
| | - Weiben Chen
- College of Physics and Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
| | - Wei Xiong
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, No. 68 Wenchang Road, Kunming 650093, China
| | - Zilin Ruan
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, No. 68 Wenchang Road, Kunming 650093, China
| | - Hui Zhang
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, No. 68 Wenchang Road, Kunming 650093, China
| | - Shijie Sun
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, No. 68 Wenchang Road, Kunming 650093, China
| | - Long Chen
- State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, Changchun 130012, China
| | - Lei Gao
- Faculty of Science, Kunming University of Science and Technology, No. 727 Jingming South Road, Kunming 650500, China
| | - Jinming Cai
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, No. 68 Wenchang Road, Kunming 650093, China
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Zhang Y, Lu J, Li Y, Li B, Ruan Z, Zhang H, Hao Z, Sun S, Xiong W, Gao L, Chen L, Cai J. On‐Surface Synthesis of a Nitrogen‐Doped Graphene Nanoribbon with Multiple Substitutional Sites. Angew Chem Int Ed Engl 2022; 61:e202204736. [DOI: 10.1002/anie.202204736] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Indexed: 11/07/2022]
Affiliation(s)
- Yong Zhang
- Faculty of Materials Science and Engineering Kunming University of Science and Technology Kunming 650093 China
| | - Jianchen Lu
- Faculty of Materials Science and Engineering Kunming University of Science and Technology Kunming 650093 China
| | - Yang Li
- State Key Laboratory of Supramolecular Structure and Materials College of Chemistry Jilin University Changchun 130012 China
| | - Baijin Li
- Faculty of Materials Science and Engineering Kunming University of Science and Technology Kunming 650093 China
| | - Zilin Ruan
- Faculty of Materials Science and Engineering Kunming University of Science and Technology Kunming 650093 China
| | - Hui Zhang
- Faculty of Materials Science and Engineering Kunming University of Science and Technology Kunming 650093 China
| | - Zhenliang Hao
- Faculty of Materials Science and Engineering Kunming University of Science and Technology Kunming 650093 China
| | - Shijie Sun
- Faculty of Materials Science and Engineering Kunming University of Science and Technology Kunming 650093 China
| | - Wei Xiong
- Faculty of Materials Science and Engineering Kunming University of Science and Technology Kunming 650093 China
| | - Lei Gao
- Faculty of Science Kunming University of Science and Technology Kunming 650500 China
| | - Long Chen
- State Key Laboratory of Supramolecular Structure and Materials College of Chemistry Jilin University Changchun 130012 China
| | - Jinming Cai
- Faculty of Materials Science and Engineering Kunming University of Science and Technology Kunming 650093 China
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7
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Zhang Y, Lu J, Li Y, Li B, Ruan Z, Zhang H, Hao Z, Sun S, Xiong W, Gao L, Chen L, Cai J. On‐surface Synthesis of Nitrogen‐doped Graphene Nanoribbon with Multiple Substitutional Sites. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202204736] [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: 11/06/2022]
Affiliation(s)
- Yong Zhang
- Kunming University of Science and Technology Faculty of Materials Science and Engineering CHINA
| | - Jianchen Lu
- Kunming University of Science and Technology Faculty of Materials Science and Engineering CHINA
| | - Yang Li
- Jilin University College of Chemistry CHINA
| | - Baijin Li
- Kunming University of Science and Technology Faculty of Materials Science and Engineering CHINA
| | - Zilin Ruan
- Kunming University of Science and Technology Faculty of Materials Science and Engineering CHINA
| | - Hui Zhang
- Kunming University of Science and Technology Faculty of Materials Science and Engineering CHINA
| | - Zhenliang Hao
- Kunming University of Science and Technology Faculty of Materials Science and Engineering CHINA
| | - Shijie Sun
- Kunming University of Science and Technology Faculty of Materials Science and Engineering CHINA
| | - Wei Xiong
- Kunming University of Science and Technology - Xinying Campus Faculty of Materials Science and Engineering CHINA
| | - Lei Gao
- Kunming University of Science and Technology Faculty of Materials Science and Engineering CHINA
| | - Long Chen
- Jilin University College of Chemistry No.2699 Qianjin Street 130012 Changchun CHINA
| | - Jinming Cai
- Kunming University of Science and Technology Faculty of Materials Science and Engineering CHINA
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Sun S, Li B, Fu B, Ruan Z, Zhang H, Xiong W, Zhang Y, Niu G, Lu J, Zuo X, Gao L, Cai J. Chiral structures of 6,12-dibromochrysene on Au(111) and Cu(111) surfaces. CHINESE CHEM LETT 2022. [DOI: 10.1016/j.cclet.2021.12.082] [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: 11/24/2022]
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Lu J, Da B, Xiong W, Du R, Hao Z, Ruan Z, Zhang Y, Sun S, Gao L, Cai J. Identification and electronic characterization of four cyclodehydrogenation products of H 2TPP molecules on Au(111). Phys Chem Chem Phys 2021; 23:11784-11788. [PMID: 33982699 DOI: 10.1039/d1cp01040a] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
C-H bond activation and dehydrogenative coupling reactions have always been significant approaches to construct microscopic nanostructures on surfaces. By using scanning tunneling microscopy/spectroscopy (STM/STS) and non-contact atomic force microscopy (nc-AFM) combined with density functional theory (DFT), we systematically characterized the atomically precise topographies and electronic properties of H2TPP cyclodehydrogenation products on Au(111). Through surface-assisted thermal excitation, four types of cyclodehydrogenation products were obtained and clearly resolved in the nc-AFM images. The electronic characterization depicts the predominant resonances and their spatial distributions of the four products.
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Affiliation(s)
- Jianchen Lu
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China.
| | - Binbin Da
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China.
| | - Wei Xiong
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China.
| | - Renjun Du
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China.
| | - Zhenliang Hao
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China.
| | - Zilin Ruan
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China.
| | - Yong Zhang
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China.
| | - Shijie Sun
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China.
| | - Lei Gao
- Faculty of Science, Kunming University of Science and Technology, Kunming, Yunnan 650093, China
| | - Jinming Cai
- Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650093, China.
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10
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Xuan X, Zhou J, Tian Z, Lin Y, Song J, Ruan Z, Ni B, Zhao H, Yang W. ILC3 cells promote the proliferation and invasion of pancreatic cancer cells through IL-22/AKT signaling. Clin Transl Oncol 2020; 22:563-575. [PMID: 31203574 DOI: 10.1007/s12094-019-02160-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2019] [Accepted: 06/08/2019] [Indexed: 12/17/2022]
Abstract
PURPOSE Type 3 innate lymphocytes (ILC3s) are reported to be involved in lung cancer, possibly by producing interleukin-22 (IL-22). However, whether ILC3s and their secreted IL-22 molecules contribute to the pathogenesis of pancreatic cancer (PC) remains unclear. To this end, in this study, we investigated the effects and possible mechanisms of ILC3s on PC pathogenesis. METHOD The IL-22 and IL-2i2R levels and the ILC3s' frequency in cancer tissues from PC patients and in peripheral blood from PC patients and healthy controls were analyzed by flow cytometry, immunochemistry, or immunofluorescence. The effects of IL-22-induced AKT signaling on the proliferation, invasion, and migration of PC cells were examined by co-culturing PC cell lines with ILC3s isolated from PC tissues, with or without the addition of neutralizing IL-22 antibody, IL-22R antibody or AKT inhibitor. RESULTS Our results showed that IL-22 and ILC3s were significantly upregulated in the PBMCs and cancer tissues of PC patients, and the IL-22R level was increased in PC cells. The increased frequency of ILC3s was positively correlated with the clinical features of PC patients. Co-culture experiments indicated that ILC3s promoted the proliferation, invasion, and migration of PC cell lines by secreting IL-22 to activate AKT signaling because IL-22/IL-22R or AKT blockage markedly counteracted such effects on PC cells. CONCLUSION Our data demonstrated that ILC3s may promote PC pathogenesis through IL-22/IL-22R-AKT signaling, suggesting a potential intervention target for PC treatment in the future.
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Affiliation(s)
- X Xuan
- Department of Pathophysiology, College of High Altitude Military Medicine, Third Military Medical University, Chongqing, 400038, China
- Department of Kidney, Southwest Hospital, Army Medical University (Third Military Medical University), 30 Gaotanyan Street, District Shapingba, Chongqing, 400038, China
| | - J Zhou
- Institute of Immunology, PLA, Third Military Medical University, Chongqing, 400038, China
| | - Z Tian
- Institute of Immunology, PLA, Third Military Medical University, Chongqing, 400038, China
| | - Y Lin
- Bellevue Christian High School, 1601 98th Ave NE, Bellevue, WA, 98004, USA
| | - J Song
- Department of Microbial Pathogenesis and Immunology, Texas A&M University Health Science Center, College Station, TX, 77843, USA
| | - Z Ruan
- Department of Oncology and Southwest Cancer Center, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, 400038, China
| | - B Ni
- Department of Pathophysiology, College of High Altitude Military Medicine, Third Military Medical University, Chongqing, 400038, China.
| | - H Zhao
- Department of Kidney, Southwest Hospital, Army Medical University (Third Military Medical University), 30 Gaotanyan Street, District Shapingba, Chongqing, 400038, China.
| | - W Yang
- Department of Dermatology, The 181th Hospital of PLA, No. 1 Xinqiaoyuan Road, Guilin, 541002, Guangxi Zhuang Autonomous Region, China.
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Hao Z, Song L, Yan C, Zhang H, Ruan Z, Sun S, Lu J, Cai J. On-surface synthesis of one-type pore single-crystal porous covalent organic frameworks. Chem Commun (Camb) 2019; 55:10800-10803. [PMID: 31432834 DOI: 10.1039/c9cc04561a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Employing a 1,3,5-tris(4-bromophenyl)benzene precursor as a building block, we successfully fabricate large-scale, non-multihole and single-layer pCOFs on the Ag(111) surface in a controllable manner via the on-surface reaction. We reveal that two main factors, the heating rate and growth temperature, have a strong impact on the size and quality of the pCOFs by STM. Furthermore, the band gap of the pCOFs has been further measured to be approximately 3.01 eV.
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Affiliation(s)
- Zhenliang Hao
- Kunming University of Science and Technology, Faculty of Materials Science and Engineering, Kunming, Yunnan 650000, P. R. China.
| | - Lingling Song
- Kunming University of Science and Technology, Faculty of Materials Science and Engineering, Kunming, Yunnan 650000, P. R. China.
| | - Cuixia Yan
- Kunming University of Science and Technology, Faculty of Materials Science and Engineering, Kunming, Yunnan 650000, P. R. China.
| | - Hui Zhang
- Kunming University of Science and Technology, Faculty of Materials Science and Engineering, Kunming, Yunnan 650000, P. R. China.
| | - Zilin Ruan
- Kunming University of Science and Technology, Faculty of Materials Science and Engineering, Kunming, Yunnan 650000, P. R. China.
| | - Shijie Sun
- Kunming University of Science and Technology, Faculty of Materials Science and Engineering, Kunming, Yunnan 650000, P. R. China.
| | - Jianchen Lu
- Kunming University of Science and Technology, Faculty of Materials Science and Engineering, Kunming, Yunnan 650000, P. R. China.
| | - Jinming Cai
- Kunming University of Science and Technology, Faculty of Materials Science and Engineering, Kunming, Yunnan 650000, P. R. China.
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12
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Ruan Z, Zhu Y, Lin Z, Long H, Zhao R, Sun B, Cheng L, Zhao S. Association between rs12742784 polymorphism and hip fracture, bone mineral density, and EPHB2 mRNA expression levels in elderly Chinese women. Climacteric 2019; 23:93-98. [PMID: 31352841 DOI: 10.1080/13697137.2019.1640195] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
Objective: This study aimed to determine the association between rs12742784 polymorphism in the non-coding area and hip fracture, bone mineral density (BMD), and EPHB2 mRNA expression levels in elderly Chinese women.Methods: We investigated 250 Chinese women (mean age: 63.5 ± 8.3 years) including 123 hip fracture patients and 127 non-fracture controls. All participants underwent clinical examination to meet the inclusion criteria. Lumbar and hip BMD were detected by dual-energy X-ray absorptiometry. rs12742784 polymorphism was determined by restriction fragment length polymorphism and EPHB2 mRNA expression levels were measured by real-time polymerase chain reaction.Results: Distribution of rs12742784 genotypes agreed with Hardy-Weinberg equilibrium. The frequency of the CT + TT genotype was significantly associated with decreased risk of hip fracture (adjusted odds ratio = 0.57, p < 0.01) after adjusting for age and body mass index, and with increased BMD and EPHB2 mRNA expression levels. The T allele of the rs12742784 single nucleotide polymorphism (SNP) was a protective factor for hip fracture (adjusted odds ratio = 0.56, p < 0.01).Conclusion: rs12742784 polymorphism was associated with EPHB2 mRNA expression levels, BMD, and hip fracture in Chinese women. The T allele of the rs12742784 SNP was a protective factor for osteoporosis and hip fracture.
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Affiliation(s)
- Z Ruan
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, P.R. China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, P.R. China
| | - Y Zhu
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, P.R. China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, P.R. China
| | - Z Lin
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, P.R. China
| | - H Long
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, P.R. China
| | - R Zhao
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, P.R. China
| | - B Sun
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, P.R. China
| | - L Cheng
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, P.R. China
| | - S Zhao
- Department of Orthopedics, Xiangya Hospital, Central South University, Changsha, P.R. China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, P.R. China
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13
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Ruan Z, Sun Q, Jia H, Huang C, Zhou W, Xie X, Zhang J. Emergence of a ST2570 Klebsiella pneumoniae isolate carrying mcr-1 and blaCTX-M-14 recovered from a bloodstream infection in China. Clin Microbiol Infect 2019; 25:916-918. [DOI: 10.1016/j.cmi.2019.02.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2018] [Revised: 01/07/2019] [Accepted: 02/05/2019] [Indexed: 11/26/2022]
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14
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Huang HH, Liu FB, Ruan Z, Zheng J, Su YJ, Wang J. Tetramethylpyrazine (TMPZ) triggers S-phase arrest and mitochondria-dependent apoptosis in lung cancer cells. Neoplasma 2019; 65:367-375. [PMID: 29788725 DOI: 10.4149/neo_2018_170112n26] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 07/19/2017] [Indexed: 01/18/2023]
Abstract
Tetramethylpyrazine (TMPZ) is one of the active compounds extracted from the traditional Chinese herb Chuanxiong. Several studies have shown its anti-cancer properties. However, its functions in lung cancer and the underlying cellular mechanisms are relatively unknown. Our present study aimed to investigate the effects of TMPZ on A549 and 95D cells. The MTT assay showed that TMPZ decreased cell viability in a dose- and time-dependent manner. The results of the colony formation assay indicated that TMPZ strongly suppressed colony formation ability in A549 and 95D cells. Flow cytometric analysis revealed that TMPZ induced S phase arrest in lung cancer cells. In addition, TMPZ induced apoptosis, as shown by the results of propidium iodide/Annexin V double-staining. Furthermore, TMPZ decreased mitochondrial membrane potential (∆Ψm) in a dose-dependent manner. Finally, western blot analysis of TMPZ-treated cells revealed the activation of Caspase-3 and the increase of the ratio of Bax/Bcl-2. These results demonstrated that TMPZ could suppress carcinogenesis of lung cancer cells through blocking cell cycle and inducing mitochondria-dependent apoptosis by regulating Caspase-3 and Bax/Bcl-2, suggesting that TMPZ may be a promising drug to treat lung cancer.
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Affiliation(s)
- H H Huang
- Department of Thoracic Surgery, The First People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai, China
| | - F B Liu
- Department of Thoracic Surgery, The First People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai, China
| | - Z Ruan
- Department of Thoracic Surgery, The First People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai, China
| | - J Zheng
- Department of Thoracic Surgery, The First People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai, China
| | - Y J Su
- Department of Thoracic Surgery, The First People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai, China
| | - J Wang
- Department of Thoracic Surgery, The First People's Hospital Affiliated to Shanghai Jiao Tong University, Shanghai, China
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15
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Zhu HB, Su CJ, Tang HF, Ruan Z, Liu DH, Wang H, Qian YL. [Rapid determination of volatile organic compounds in workplace air by protable gas chromatography-mass spectrometer]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2018; 35:777-780. [PMID: 29294558 DOI: 10.3760/cma.j.issn.1001-9391.2017.10.019] [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 establish a method for rapid determination of 47 volatile organic compounds in the air of workplace using portable gas chromatography-mass spectrometer(GC-MS). Methods: The mixed standard gas with different concentration levels was made by using the static gas distribution method with the high purity nitrogen as dilution gas. The samples were injected into the GC-MS by a hand-held probe. Retention time and characteristic ion were used for qualitative analysis,and the internal standard method was usd for quantitation. Results: The 47 poisonous substances were separated and determined well. The linear range of this method was 0.2-16.0 mg/m(3),and the relative standard deviation of 45 volatile ovganic compounds was 3.8%-15.8%. The average recovery was 79.3%-119.0%. Conclusion: The method is simple,accurate,sensitive,has good separation effect,short analysis period, can be used for qualitative and quantitative analysis of volatile organic compounds in the workplace, and also supports the rapid identification and detection of occupational hazards.
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Affiliation(s)
- H B Zhu
- Zhejiang Academy of Medical Sciences, Hangzhou 310013, China
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16
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Hao Z, Ruan Z, Yang X, Cai Y, Lu J, Cai J. Research Progress of On-surface Chemical Reaction for Organics in Ultra-High Vacuum. Acta Chim Sinica 2018. [DOI: 10.6023/a18040164] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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17
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Ruan Z, Zhao X, Qin X, Luo C, Liu X, Deng Y, Zhu P, Li Z, Huang B, Shi D, Lu F. DNA methylation and expression of imprinted genes are associated with the viability of different sexual cloned buffaloes. Reprod Domest Anim 2017; 53:203-212. [PMID: 29076549 DOI: 10.1111/rda.13093] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [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: 06/01/2017] [Accepted: 09/07/2017] [Indexed: 01/09/2023]
Abstract
The DNA methylation of imprinted genes is an important way to regulate epigenetic reprogramming of donor cells in somatic cell nuclear transfer (SCNT). However, the effects of sexual distinction on the DNA methylation of imprinted genes in cloned animals have seldom been reported. In this study, we analysed the DNA methylation status of three imprinted genes (Xist, IGF2 and H19) from liveborn cloned buffaloes (L group, three female and three male), stillborn cloned buffaloes (S group, three female and three male) and natural reproduction buffaloes (N group, three female and three male), using bisulphite sequencing polymerase chain reaction (BS-PCR). The expression levels of these imprinted genes were also investigated by quantitative real-time PCR (QRT-PCR). The DNA methylation levels of H19 were not significantly different among the groups. However, the Xist in female and IGF2 in male of the S group were found to be significantly hypomethylated in comparison with the same sexual buffaloes in L group and N group (p < .05). Furthermore, the expression levels of Xist, IGF2 and H19 in the stillborn female cloned buffaloes of S group were significantly higher than that of the female buffaloes in the L group and N group (p < .05). The expression levels of IGF2 and H19 in the stillborn male cloned buffaloes in the S group were significantly higher than that of the male buffaloes in the L group and N group (p < .05). These results indicate that Xist may be associated with the viability of female cloned buffaloes, and IGF2 may also be related to the viability of male cloned buffaloes.
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Affiliation(s)
- Z Ruan
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China.,Guangxi High Education Laboratory for Animal Reproduction and Biotechnology, Guangxi University, Nanning, Guangxi, China
| | - X Zhao
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China.,Guangxi High Education Laboratory for Animal Reproduction and Biotechnology, Guangxi University, Nanning, Guangxi, China
| | - X Qin
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China.,Guangxi High Education Laboratory for Animal Reproduction and Biotechnology, Guangxi University, Nanning, Guangxi, China
| | - C Luo
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China.,Guangxi High Education Laboratory for Animal Reproduction and Biotechnology, Guangxi University, Nanning, Guangxi, China
| | - X Liu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China.,Guangxi High Education Laboratory for Animal Reproduction and Biotechnology, Guangxi University, Nanning, Guangxi, China
| | - Y Deng
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China.,Guangxi High Education Laboratory for Animal Reproduction and Biotechnology, Guangxi University, Nanning, Guangxi, China
| | - P Zhu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China.,Guangxi High Education Laboratory for Animal Reproduction and Biotechnology, Guangxi University, Nanning, Guangxi, China
| | - Z Li
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China.,Guangxi High Education Laboratory for Animal Reproduction and Biotechnology, Guangxi University, Nanning, Guangxi, China
| | - B Huang
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China.,Guangxi High Education Laboratory for Animal Reproduction and Biotechnology, Guangxi University, Nanning, Guangxi, China
| | - D Shi
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China.,Guangxi High Education Laboratory for Animal Reproduction and Biotechnology, Guangxi University, Nanning, Guangxi, China
| | - F Lu
- State Key Laboratory for Conservation and Utilization of Subtropical Agro-bioresources, Guangxi University, Nanning, Guangxi, China.,Guangxi High Education Laboratory for Animal Reproduction and Biotechnology, Guangxi University, Nanning, Guangxi, China
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18
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Ruan Z, Tang HF, Wang H. [Quality control methods of gas chromatography⁃ion trap mass determine for the 2, 5⁃hexanedione in normal population urinary]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2017; 35:319-320. [PMID: 28614944 DOI: 10.3760/cma.j.issn.1001-9391.2017.04.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
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19
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Ruan Z, Tang HF, Zhu HB. [Determination in the air of workplace dimethyl succinate and dimethyl glutarate and dimethyl adipate by gas chromatography]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2016; 34:941-944. [PMID: 28241689 DOI: 10.3760/cma.j.issn.1001-9391.2016.12.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
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20
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Zhou Y, Ruan Z, Li XL, Mi SM, Jiang M, Liu WH, Yang HS, Wu X, Jiang GL, Yin YL. Eucommia ulmoides Oliver leaf polyphenol supplementation improves meat quality and regulates myofiber type in finishing pigs1. J Anim Sci 2016. [DOI: 10.2527/jas.2015-9551] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Y. Zhou
- Key Laboratory of Food Science and Technology, College of Food Science, Nanchang University, Nanchang, Jiangxi 330047, China
| | - Z. Ruan
- Key Laboratory of Food Science and Technology, College of Food Science, Nanchang University, Nanchang, Jiangxi 330047, China
| | - X. L. Li
- Key Laboratory of Food Science and Technology, College of Food Science, Nanchang University, Nanchang, Jiangxi 330047, China
| | - S. M. Mi
- Key Laboratory of Food Science and Technology, College of Food Science, Nanchang University, Nanchang, Jiangxi 330047, China
| | - M. Jiang
- Key Laboratory of Food Science and Technology, College of Food Science, Nanchang University, Nanchang, Jiangxi 330047, China
| | - W. H. Liu
- Key Laboratory of Food Science and Technology, College of Food Science, Nanchang University, Nanchang, Jiangxi 330047, China
| | - H. S. Yang
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan 410125, China
- School of Life Science, Hunan Normal University, Hunan, China
| | - X. Wu
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan 410125, China
| | - G. L. Jiang
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan 410125, China
| | - Y. L. Yin
- Key Laboratory of Food Science and Technology, College of Food Science, Nanchang University, Nanchang, Jiangxi 330047, China
- Key Laboratory of Agro-ecological Processes in Subtropical Region, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha, Hunan 410125, China
- Academician Workstation for Xingjia Bio-Engineering Co., Ltd, Changsha 410129, China
- Guangdong Hinapharm Group Academician Workstation for Biological Feed and Feed Additives and Animal Intestinal Health, Guangzhou 511400, China
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21
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Li XL, Jiang M, Ruan Z, Mi SM, Wu X, Yao K, Xiong X, Zhou Y, Yin YL. Tryptophan increases intestinal permeability and decreases intestinal tight junction protein expression in weanling piglets1. J Anim Sci 2016. [DOI: 10.2527/jas.2015-9465] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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22
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Qian YL, Ruan Z, Xu CM. [An inhalation poison caused by thermal degradation products of fluorine polymer]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2016; 34:377-378. [PMID: 27514425 DOI: 10.3760/cma.j.issn.1001-9391.2016.05.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
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23
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Ge F, Lin H, Liu Y, Li M, Guo R, Ruan Z, Chang T. Dual antiplatelet therapy after stroke or transient ischaemic attack - how long to treat? The duration of aspirin plus clopidogrel in stroke or transient ischaemic attack: a systematic review and meta-analysis. Eur J Neurol 2016; 23:1051-7. [PMID: 27021849 DOI: 10.1111/ene.12982] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Accepted: 01/18/2016] [Indexed: 11/27/2022]
Affiliation(s)
- F. Ge
- Department of Neurology; Tangdu Hospital; Fourth Military Medical University; Shaanxi Province China
| | - H. Lin
- Department of Neurology; Tangdu Hospital; Fourth Military Medical University; Shaanxi Province China
| | - Y. Liu
- Department of Neurology; Tangdu Hospital; Fourth Military Medical University; Shaanxi Province China
| | - M. Li
- Department of Neurology; Tangdu Hospital; Fourth Military Medical University; Shaanxi Province China
| | - R. Guo
- Department of Neurology; Tangdu Hospital; Fourth Military Medical University; Shaanxi Province China
| | - Z. Ruan
- Department of Neurology; Tangdu Hospital; Fourth Military Medical University; Shaanxi Province China
| | - T. Chang
- Department of Neurology; Tangdu Hospital; Fourth Military Medical University; Shaanxi Province China
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Chen J, Jiang B, Lou H, Xu Y, Shao R, Ruan Z. Dose Proportionality and Pharmacokinetics of Eplerenone in Healthy Chinese Subjects. Drug Res (Stuttg) 2015; 66:154-9. [PMID: 26262771 DOI: 10.1055/s-0035-1559623] [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: 10/23/2022]
Abstract
BACKGROUND Eplerenone (CAS 107724-20-9) is the first highly selective aldosterone receptor blocker and is used worldwide for treatment of hypertension and heart failure. OBJECTIVE The objective of this study was to investigate the eplerenone pharmacokinetics in healthy Chinese subjects and assess the dose proportionality over the therapeutic dose range. METHODS A single-dose, randomized, 6-sequence, 3-treatment, 3-period crossover, open label study was conducted in 12 healthy Chinese subjects, who received 3 doses of eplerenone in random order (25, 50, 100 mg). The power model was used to evaluate the dose proportionality of eplerenone. The pharmacokinetic study of multiple-dose of eplerenone was also conducted. RESULTS After single-dose oral administration, the mean C max value increased from 489 to 1 641 ng/mL, and the mean AUC 0-t value increased from 3 030 to 10 893 ng/mL·h with an increase in dose from 25 to 100 mg, respectively. The mean value for terminal T 1/2 was approximate 3 h with no significant differences among different dose groups. Though dose proportionality of eplerenone was inconclusive in Chinese subjects over the dose range of 25-100 mg, the maximal proportionality dose range (ρ1) was 2.06 based on power model. Steady state could achieve within at least 4 days and no accumulation was observed after multiple-dose of eplerenone. CONCLUSION Dose proportionality was inconclusive in over the dose range of 25-100 mg; however, linear pharmacokinetics could be considered when dose ratio is no more than 2.06.
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Affiliation(s)
- J Chen
- Center of Clinical Pharmacology, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - B Jiang
- Center of Clinical Pharmacology, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - H Lou
- Center of Clinical Pharmacology, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Y Xu
- Center of Clinical Pharmacology, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - R Shao
- Center of Clinical Pharmacology, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Z Ruan
- Center of Clinical Pharmacology, the Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
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Ruan Z, Zeng RG, Ming Y, Zhang M, Da B, Mao SF, Ding ZJ. Quantum-trajectory Monte Carlo method for study of electron–crystal interaction in STEM. Phys Chem Chem Phys 2015; 17:17628-37. [DOI: 10.1039/c5cp02300a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [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
A quantum trajectory Monte Carlo method is developed to simulate electron scattering and secondary electron cascade process in crystalline specimen.
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Affiliation(s)
- Z. Ruan
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics
- University of Science and Technology of China
- Hefei
- P. R. China
| | - R. G. Zeng
- Science and Technology on Surface Physics and Chemistry Laboratory
- Mianyang
- P. R. China
| | - Y. Ming
- School of Physics and Material Science
- Anhui University
- Hefei
- P. R. China
| | - M. Zhang
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics
- University of Science and Technology of China
- Hefei
- P. R. China
| | - B. Da
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics
- University of Science and Technology of China
- Hefei
- P. R. China
| | - S. F. Mao
- School of Nuclear Science and Technology
- University of Science and Technology of China
- Hefei
- P. R. China
| | - Z. J. Ding
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics
- University of Science and Technology of China
- Hefei
- P. R. China
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Lu F, Li Z, Ruan Z, Liu X, Du S, Ruan Q, Deng Y, Jiang J, Shi D. 123 EFFECTS OF TAURO URSODEOXYCHOLIC ACID ON DEVELOPMENT OF BOVINE EMBRYOS FROM IN VITRO FERTILIZATION. Reprod Fertil Dev 2015. [DOI: 10.1071/rdv27n1ab123] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Endoplasmic reticulum stress (ERS) is a novel apoptotic pathway and plays an important role for embryonic development. Tauro ursodeoxycholic acid (TUDCA) is a specific chemical chaperone that can inhibit ERS. In this study, we investigated the effects of TUDCA on the development and mRNA expression of ERS-related genes in bovine embryos from IVF in order to improve the efficiency of embryo in vitro culture. Bovine oocytes collected from ovaries at slaughter were cultured in the maturation medium (TCM-199 + 26.2 mmol L–1 NaHCO3 + 5 mmol L–1 HEPES + 5% fetal bovine serum) for 24 h and fertilized in vitro with bovine sperm. After fertilization, the embryos were respectively placed into the medium (TCM-199 + 3% fetal bovine serum) containing different concentrations of TUDCA (0, 100, 250, 500, 1000 μmol L–1) and cultured in the 5% CO2 at 38.5°C. Blastocyst development was evaluated after 7 days of culture, and then the total cell number and apoptosis index of blastocysts were detected with TUNEL. In addition, X-box binding protein 1 (XBP-1) of embryos at 2-cell, 4-cell, morula, and blastocyst stages was detected with RT-PCR, and the change of the mRNA expression of ERS-related (Grp78, Ire1, Chop) and apoptosis-related (Bax, Bcl-2) genes in blastocyst collected at 7 days of culture were analysed by QRT-PCR. A total of 1336 oocytes were used in this study, and each experimental group comprised 6 replicates. The results revealed that the splicing of XBP-1 was present during the development of bovine embryos, and especially obvious at the 4-cell, morula, and blastocyst stages. When embryos were cultured in medium with different concentrations of TUDCA, compared with the control group (0 μmol L–1), more embryos developed to blastocyst stage with 500 μmol L–1 TUDCA (31.86 ± 7.32% v. 21.11 ± 8.05%; P < 0.05), but the cleavage rate was not significantly different among groups (P > 0.05). The result for TUNEL found that when adding 500 μmol L–1 TUDCA to culture, the bovine embryos significantly improved the total cell number of blastocysts (110. ± 15.21 v. 102.3 ± 8.62; P < 0.05), and the apoptosis index of blastocysts was markedly decreased (3.71 ± 0.91 v. 5.36 ± 1.92; P < 0.05) relative to the control group. Moreover, the result of QRT-PCR analysis showed that treating embryos with 500 μmol L–1 TUDCA significantly reduced the mRNA expression level of Ire1 and Chop genes (P < 0.05) and up-regulated the expression of anti-apoptotic Bcl-2 gene (P < 0.05), while down-regulated the expression of pro-apoptotic Bax gene (P < 0.05). Furthermore, XBP-1 splicing in blastocysts also abated after embryos were treated with 500 μmol L–1 TUDCA. In conclusion, ERS occurs in bovine embryos during in vitro culture, but treating embryos with 500 μmol L–1 TUDCA may reduce ERS to facilitate embryonic development.
This work was funded by the China High Technology Development Program (2011AA100607), China Natural Science Foundation (31072033), and Guangxi Science Foundation (2011GXNSFA018084, 2012GXNSFFA060004).
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Ruan Z, Zhang M, Zeng RG, Ming Y, Da B, Mao SF, Ding ZJ. Simulation study of the atomic resolution secondary electron imaging. SURF INTERFACE ANAL 2014. [DOI: 10.1002/sia.5565] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Z. Ruan
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics; University of Science and Technology of China; Hefei Anhui 230026 PR China
| | - M. Zhang
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics; University of Science and Technology of China; Hefei Anhui 230026 PR China
| | - R. G. Zeng
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics; University of Science and Technology of China; Hefei Anhui 230026 PR China
| | - Y. Ming
- School of Physics and Material Science; Anhui University; Hefei Anhui 230601 PR China
| | - B. Da
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics; University of Science and Technology of China; Hefei Anhui 230026 PR China
| | - S. F. Mao
- School of Nuclear Science and Technology; University of Science and Technology of China; Hefei Anhui 230026 PR China
| | - Z. J. Ding
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics; University of Science and Technology of China; Hefei Anhui 230026 PR China
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Ji S, Chen Y, Ruan Z, Fu Y, Ji J, Fu Y, Wang H, Yu Y. Prevalence of carbapenem-hydrolyzing class D β-lactamase genes in Acinetobacter spp. isolates in China. Eur J Clin Microbiol Infect Dis 2013; 33:989-97. [PMID: 24374815 DOI: 10.1007/s10096-013-2037-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2013] [Accepted: 12/12/2013] [Indexed: 10/25/2022]
Abstract
In order to assess the prevalence of carbapenem-hydrolyzing class D β-lactamase genes in Acinetobacter spp. isolates in China, we conducted a polymerase chain reaction (PCR)-based surveillance of OXA-type β-lactamase gene clusters for a total of 2,880 Acinetobacter spp. isolates collected from 23 Chinese provinces. All isolates were tested for susceptibility to 12 antimicrobial agents and showed high rates of resistance to all these agents except minocycline. We also found that the vast majority of carbapenem-resistant Acinetobacter spp. were OXA-23-like-producing isolates, predominantly Acinetobacter baumannii isolates. Besides, bla OXA-58-like and bla OXA-24-like genes were detected in 32 and 11 isolates, respectively, involving many provinces throughout China. Furthermore, these two carbapenem-resistance determinants were located on transferable plasmids in most cases, indicating an emerging threat for both OXA-58-like- and OXA-24-like-producing Acinetobacter spp. isolates in China. Interestingly, a novel homologue of the bla OXA-143 gene was identified in a susceptible Acinetobacter pittii isolate. Overall, these observations suggest that the bla OXA-23-harboring A. baumannii isolates are the most frequent carbapenem-resistant Acinetobacter spp. in China, and the bla OXA-24-like and bla OXA-58-like genes have emerged as potential threats of hospital outbreaks of multidrug-resistant Acinetobacter spp.
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Affiliation(s)
- S Ji
- Department of Infectious Diseases, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, China
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Zhang J, Kong Y, Feng Y, Huang J, Song T, Ruan Z, Song J, Jiang Y, Yu Y, Xie X. Development of a multilocus sequence typing scheme for Ureaplasma. Eur J Clin Microbiol Infect Dis 2013; 33:537-44. [PMID: 24072679 DOI: 10.1007/s10096-013-1981-y] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2013] [Accepted: 09/08/2013] [Indexed: 11/28/2022]
Abstract
Ureaplasma is a commensal of the human urogenital tract but is always associated with invasive diseases such as non-gonococcal urethritis and infertility adverse pregnancy outcomes. To better understand the molecular epidemiology and population structure of Ureaplasma, a multilocus sequence typing (MLST) scheme based on four housekeeping genes (ftsH, rpL22, valS, thrS) was developed and validated using 283 isolates, including 14 serovars of reference strains and 269 strains obtained from clinical patients. A total of 99 sequence types (STs) were revealed: the 14 type strains of the Ureaplasma serovars were assigned to 12 STs, and 87 novel and special STs appeared among the clinical isolates. ST1 and ST22 were the predominant STs, which contained 68 and 70 isolates, respectively. Two clonal lineages (CC1 and CC2) were shown by eBURST analysis, and linkage disequilibrium was revealed through a standardized index of association (I A (S)). The neighbor-joining tree results of 14 Ureaplasma serovars showed two genetically significantly distant clusters, which was highly congruent with the species taxonomy of ureaplasmas [Ureaplasma parvum (UPA) and Ureaplasma urealyticum (UUR)]. Analysis of the biotypes of 269 clinical isolates revealed that all the isolates of CC1 were UPA and those of CC2 were UUR. Additionally, CC2 was found more often in symptomatic patients with vaginitis, tubal obstruction, and cervicitis. In conclusion, this MLST scheme is adequate for investigations of molecular epidemiology and population structure with highly discriminating capacity.
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Affiliation(s)
- J Zhang
- Clinical Laboratory, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, 310016, China
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Chai X, Lin Q, Ruan Z, Zheng J, Zhou J, Zhang J. The clinical application of absorbable intramedullary nail and claw plate on treating multiple rib fractures. MINERVA CHIR 2013; 68:415-420. [PMID: 23764613] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
AIM The absorption intramedullary nail and claw plate indications and efficacy were investigated in the treatment of a life-threatening multiple rib fractures. METHODS A retrospective analysis of 248 surgically treated rib fracture patients was performed who admitted to our hospital from March 2007 to December 2012. Intramedullary nailing was performed in 28 cases, a claw-type bone plate was fixed in 141 cases, and a combination of both was fixed in 79 cases. RESULTS All internal fixation patients were clinically cured except 1 patient died 14 days after a massive pulmonary embolism. The patients with flail chest and floating chest wall causing respiratory and circulatory disorders were promptly corrected. Routine follow-up was from 1 to 2 years, displaced fractures were in 2 cases, and there were 11 cases of internal fixation and extraction. CONCLUSION Internal fixation is a simple and reliable method for the treatment of multiple rib fractures. Both internal fixation materials have their pros and cons but the claw bone plate is more robust. The actual selection of appropriate treatment options helps to improve the treatment efficacy.
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Affiliation(s)
- X Chai
- Department of Thoracic Surgery, Shanghai First People's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China -
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Lin ZF, Shen XY, Lu FZ, Ruan Z, Huang HL, Zhen J. Reveals new lung adenocarcinoma cancer genes based on gene expression. Eur Rev Med Pharmacol Sci 2012; 16:1249-1256. [PMID: 23047510] [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: 06/01/2023]
Abstract
BACKGROUND Lung adenocarcinoma (LAC) is the most common type of lung cancer, accounting for 30-35% of all cases. AIM In this study we aim to predict potential genes and confirm pathways which are associated with LAC. MATERIALS AND METHODS By using the meta-analysis method, GSE10072 and GSE 2514 datasets were merged to find potential genes and pathways which are associated with LAC. RESULTS Our analysis indicated identified differentially expressed genes enriched in multicellular organismal metabolic process, gland development, and urogenital system development. Further, we predicted genes including EGF-like domain might be the potential target genes for further study, such as NGX6, MUC17, and Nel. In addition, a number of genes that associated with axon guidance, focal adhesion, and complement and coagulation cascades pathway might be also involved in LAC in a direct or indirectly manner. CONCLUSIONS Our analysis indicated identified differentially expressed genes enriched in multicellular organismal metabolic process, gland development, and urogenital system development We anticipate numerous advances in LAC research in the coming years based on our meta-analysis.
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Affiliation(s)
- Z-F Lin
- Department of Thoracic Surgery, Shanghai Jiaotong University, Shanghai, China.
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Wu X, Yin Y, Liu Y, Liu X, Liu Z, Li T, Huang R, Ruan Z, Deng Z. Effect of dietary arginine and N-carbamoylglutamate supplementation on reproduction and gene expression of eNOS, VEGFA and PlGF1 in placenta in late pregnancy of sows. Anim Reprod Sci 2012; 132:187-92. [DOI: 10.1016/j.anireprosci.2012.05.002] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2011] [Revised: 04/26/2012] [Accepted: 05/04/2012] [Indexed: 10/28/2022]
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Jiang B, Chen J, Ruan Z, Lou H, Yu L. Quantification of Azithromycin in Human Plasma by Liquid Chromatography Tandem Mass Spectrometry: Application to a Bioequivalence Study. ACTA ACUST UNITED AC 2012; 62:230-5. [PMID: 22344571 DOI: 10.1055/s-0031-1301343] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Affiliation(s)
- B. Jiang
- Division of Clinical Pharmacology, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - J. Chen
- Division of Clinical Pharmacology, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Z. Ruan
- Division of Clinical Pharmacology, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - H. Lou
- Division of Clinical Pharmacology, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - L. Yu
- Division of Clinical Pharmacology, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
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Chen J, Jiang B, Lou H, Yu L, Ruan Z. Bioequivalence Studies of 2 Oral Cefaclor Capsule Formulations in Chinese Healthy Subjects. ACTA ACUST UNITED AC 2012; 62:134-7. [PMID: 22286978 DOI: 10.1055/s-0031-1298012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- J. Chen
- Division of Clinical of Pharmacology, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, P. R. China
| | - B. Jiang
- Division of Clinical of Pharmacology, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, P. R. China
| | - H. Lou
- Division of Clinical of Pharmacology, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, P. R. China
| | - L. Yu
- Division of Clinical of Pharmacology, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, P. R. China
| | - Z. Ruan
- Division of Clinical of Pharmacology, 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, P. R. China
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Abstract
A simple and sensitive HPLC method was developed to determine cefdinir (CAS 91832-40-5) in human plasma. The method was validated by investigating the accuracy and precision for intra- and inter-day runs in a linear concentration from 0.05-2.0 µg/ml. The object of this study was to compare the bioavailability of cefdinir capsule (reference) and cefdinir granule (test) containing 100 mg of cefdinir. A randomized, open-label, single-dose, 2-way crossover bioequivalence study in 20 healthy, Chinese, male subjects was conducted. A 1-week wash-out period was applied. Blood samples were collected before and with 10 h after drug administration. The formulations were compared using the following pharmacokinetic parameters: AUC0-t, AUC0-∞ and C max. The 90% confidence interval (CI) of the ratios of log-transformed AUC0-t and AUC0-∞ were used to assess bioequivalence between the 2 formulations using the equivalence interval of 80 and 125%. The results showed that the 90% CI of the ratios of AUC0-t, AUC0-∞ and C max were 102.5% (94.7-111.0%), 103.4% (94.8-112.7%) and 106.4% (97.0-116.7%), respectively, which indicated 2 formulations of cefidinir are bioequivalent. Both treatments showed similar tolerability and safety.
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Affiliation(s)
- J Chen
- School of Medicine, Zhejiang University, Hangzhou, People's Republic of China
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Ruan Z, Zhou Y, Wang S, Zhang J, Wang Y, Xu W. Clinical Use of Lymphangiography for Intractable Spontaneous Chylothorax. Thorac Cardiovasc Surg 2011; 59:430-5. [DOI: 10.1055/s-0030-1271031] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Abstract
Aflatoxins are a group of toxic and carcinogenic fungal metabolites. They are commonly found in cereals, nuts and animal feeds and create a significant threat to the food industry and animal production. Several strategies have been developed to avoid or reduce harmful effects of aflatoxins since the 1960s. However, prevention of aflatoxin contamination pre/post harvest or during storage has not been satisfactory and control strategies such as physical removing and chemical inactivating used in food commodities have their deficiencies, which limit their large scale application. It is expected that progress in the control of aflatoxin contamination will depend on the introduction of technologies for specific, efficient and environmentally sound detoxification. The utilisation of biological detoxification agents, such as microorganisms and/or their enzymatic products to detoxify aflatoxins in contaminated food and feed can be a choice of such technology. To date, many of the microbial strategies have only showed reduced concentration of aflatoxins and the structure and toxicity of the detoxified products are unclear. More attention should be paid to the detoxification reactions, the structure of biotransformed products and the enzymes responsible for the detoxification. In this article, microbial strategies for aflatoxin control such as microbial binding and microbial biotransformation are reviewed.
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Affiliation(s)
- S. Guan
- State Key Laboratory of Food Science and Technology and College of Life Science and Food Engineering, Nanchang University, Nanchang 330031, China P.R
- Institute of Subtropical Agriculture, the Chinese Academy of Sciences, Research Center for Healthy Breeding of Livestock and Poultry, Hunan Engineering and Research Center of Animal and Poultry Science and Key Laboratory for Agro-Ecological Processes in Subtropical Region, 410125 Hunan, Changsha, China P.R
- Guelph Food Research Center, Agriculture and Agri-Food Canada, 93 Stone Rd W, Guelph N1G 5C9, Canada
| | - T. Zhou
- Guelph Food Research Center, Agriculture and Agri-Food Canada, 93 Stone Rd W, Guelph N1G 5C9, Canada
| | - Y. Yin
- State Key Laboratory of Food Science and Technology and College of Life Science and Food Engineering, Nanchang University, Nanchang 330031, China P.R
- Institute of Subtropical Agriculture, the Chinese Academy of Sciences, Research Center for Healthy Breeding of Livestock and Poultry, Hunan Engineering and Research Center of Animal and Poultry Science and Key Laboratory for Agro-Ecological Processes in Subtropical Region, 410125 Hunan, Changsha, China P.R
| | - M. Xie
- State Key Laboratory of Food Science and Technology and College of Life Science and Food Engineering, Nanchang University, Nanchang 330031, China P.R
| | - Z. Ruan
- State Key Laboratory of Food Science and Technology and College of Life Science and Food Engineering, Nanchang University, Nanchang 330031, China P.R
| | - J. Young
- Guelph Food Research Center, Agriculture and Agri-Food Canada, 93 Stone Rd W, Guelph N1G 5C9, Canada
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Wang S, Ruan Z, Liu F, Huang H, Zheng J, Song K. A rare case of circumferential intramural dissection of the thoracic esophagus. Thorac Cardiovasc Surg 2010; 58:494-5. [PMID: 21110276 DOI: 10.1055/s-0030-1250242] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Esophageal intramural dissection is a rare disease, and whole thoracic esophageal intramural dissection is extremely rare. We report a case of circumferential intramural dissection of the thoracic esophagus, which occurred between the submucosal layer and the muscularis propria layer, with inflammation in the false lumen mimicking esophageal mediastinal fistula in the endoscopic view. The diagnosis was finally confirmed at operation and cured by thoracic esophagectomy.
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Affiliation(s)
- S Wang
- Department of Thoracic Surgery, The First Affiliated People's Hospital, Shanghai Jiao Tong University, Shanghai, China
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Wang S, Ruan Z, Liu F, Huang H, Song K. Pulmonary sequestration: angioarchitecture evaluated by three-dimensional computed tomography angiography. Thorac Cardiovasc Surg 2010; 58:354-6. [PMID: 20824589 DOI: 10.1055/s-0030-1250024] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Pulmonary sequestration represents an anomaly of nonfunctioning tracheobronchial branching with retention of the embryonic systemic arterial supply. We report a case of intralobar pulmonary sequestration, in which the abnormal supplying artery and especially the abnormal draining vein were demonstrated by three-dimensional computed tomography angiography and were confirmed and treated using a video-assisted thoracoscopic procedure.
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Affiliation(s)
- S Wang
- Department of Thoracic Surgery, The First Affiliated People's Hospital, Shanghai Jiao Tong University, Shanghai, China
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Deng J, Wu X, Bin S, Li TJ, Huang R, Liu Z, Liu Y, Ruan Z, Deng Z, Hou Y, Yin YL. Dietary amylose and amylopectin ratio and resistant starch content affects plasma glucose, lactic acid, hormone levels and protein synthesis in splanchnic tissues. J Anim Physiol Anim Nutr (Berl) 2010; 94:220-6. [DOI: 10.1111/j.1439-0396.2008.00902.x] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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McConell GK, Ng GPY, Phillips M, Ruan Z, Macaulay SL, Wadley GD. Central role of nitric oxide synthase in AICAR and caffeine-induced mitochondrial biogenesis in L6 myocytes. J Appl Physiol (1985) 2009; 108:589-95. [PMID: 20044477 DOI: 10.1152/japplphysiol.00377.2009] [Citation(s) in RCA: 57] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
5-Aminoimidazole-4-carboxamide-ribonucleoside (AICAR) and caffeine, which activate AMP-activated protein kinase (AMPK) and cause sarcoplasmic reticulum calcium release, respectively, have been shown to increase mitochondrial biogenesis in L6 myotubes. Nitric oxide (NO) donors also increase mitochondrial biogenesis. Since neuronal and endothelial NO synthase (NOS) are calcium dependent and are also phosphorylated by AMPK, we hypothesized that NOS inhibition would attenuate the activation of mitochondrial biogenesis in response to AICAR and caffeine. L6 myotubes either were not treated (control) or were exposed acutely or for 5 h/day over 5 days to 100 microM of N(G)-nitro-L-arginine methyl ester (L-NAME, NOS inhibitor), 100 microM S-nitroso-N-acetyl-penicillamine (SNAP) (NO donor) +/- 100 microM L-NAME, 2 mM AICAR +/- 100 microM L-NAME, or 5 mM caffeine +/- 100 microM L-NAME (n = 12/treatment). Acute AICAR administration increased (P < 0.05) phospho- (P-)AMPK, but also increased P-CaMK, with resultant chronic increases in peroxisome proliferator-activated receptor-gamma coactivator-1 alpha (PGC-1 alpha), cytochrome-c oxidase (COX)-1, and COX-4 protein expression compared with control cells. NOS inhibition, which had no effect on AICAR-stimulated P-AMPK, surprisingly increased P-CaMK and attenuated the AICAR-induced increases in COX-1 and COX-4 protein. Caffeine administration, which increased P-CaMK without affecting P-AMPK, increased COX-1, COX-4, PGC-1 alpha, and citrate synthase activity. NOS inhibition, surprisingly, greatly attenuated the effect of caffeine on P-CaMK and attenuated the increases in COX-1 and COX-4 protein. SNAP increased all markers of mitochondrial biogenesis, and it also increased P-AMPK and P-CaMK. In conclusion, AICAR and caffeine increase mitochondrial biogenesis in L6 myotubes, at least in part, via interactions with NOS.
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Affiliation(s)
- G K McConell
- Department of Physiology, The University of Melbourne, Parkville, Victoria 3010, Australia.
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Fang J, Yan F, Kong X, Ruan Z, Liu Z, Huang R, Li T, Geng M, Yang F, Zhang Y, Li P, Gong J, Wu G, Fan M, Liu Y, Hou Y, Yin Y. Dietary supplementation with Acanthopanax senticosus extract enhances gut health in weanling piglets. Livest Sci 2009. [DOI: 10.1016/j.livsci.2008.11.020] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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43
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Kong XF, Yin YL, He QH, Yin FG, Liu HJ, Li TJ, Huang RL, Geng MM, Ruan Z, Deng ZY, Xie MY, Wu G. Dietary supplementation with Chinese herbal powder enhances ileal digestibilities and serum concentrations of amino acids in young pigs. Amino Acids 2008; 37:573-82. [DOI: 10.1007/s00726-008-0176-9] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2008] [Accepted: 08/18/2008] [Indexed: 01/05/2023]
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44
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Yin YL, Tang ZR, Sun ZH, Liu ZQ, Li TJ, Huang RL, Ruan Z, Deng ZY, Gao B, Chen LX, Wu GY, Kim SW. Effect of Galacto-mannan-oligosaccharides or Chitosan Supplementation on Cytoimmunity and Humoral Immunity in Early-weaned Piglets. Asian Australas J Anim Sci 2008. [DOI: 10.5713/ajas.2008.70408] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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45
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Wu X, Ruan Z, Zhang YG, Hou YQ, Yin YL, Li TJ, Huang RL, Chu WY, Kong XF, Gao B, Chen LX. True Digestibility of Phosphorus in Different Resources of Feed Ingredients in Growing Pigs. Asian Australas J Anim Sci 2008. [DOI: 10.5713/ajas.2008.70143] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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46
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Ruan Z, Zhang YG, Yin YL, Li TJ, Huang RL, Kim SW, Wu GY, Deng ZY. Dietary Requirement of True Digestible Phosphorus and Total Calcium for Growing Pigs. Asian Australas J Anim Sci 2007. [DOI: 10.5713/ajas.2007.1236] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Deng D, Huang R, Li T, Wu G, Xie M, Tang Z, Kang P, Zhang Y, Fan M, Kong X, Ruan Z, Xiong H, Deng Z, Yin YL. Nitrogen balance in barrows fed low-protein diets supplemented with essential amino acids. Livest Sci 2007. [DOI: 10.1016/j.livsci.2007.01.122] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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48
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Kong X, Wu G, Liao Y, Hou Z, Liu H, Yin F, Li T, Huang R, Zhang Y, Deng D, Kang P, Wang R, Tang Z, Yang C, Deng Z, Xiong H, Chu WY, Ruan Z, Xie M, Yin Y. Effects of Chinese herbal ultra-fine powder as a dietary additive on growth performance, serum metabolites and intestinal health in early-weaned piglets. Livest Sci 2007. [DOI: 10.1016/j.livsci.2007.01.079] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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49
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Zhou Q, Ruan Z, Yuan H, Jiang B, Xu D. RP-HPLC analysis of flucloxacillin in human plasma: validation and application to a bioequivalence study. Pharmazie 2007; 62:101-4. [PMID: 17341027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
A RP-HPLC method with rapid sample processing was developed for quantitation of flucloxacillin in human plasma using dicloxacillin as the internal standard. The plasma sample (100 microL) was acidified with glacial acetic acid, and deproteinized by precipitation with acetonitrile. The supernatant was directly injected into the HPLC system. Separation was achieved on an Alltima C18 column (250 mmx4.6 mm I.D., 5 microm), with a mixture of 10 mmol x L(-1) KH2PO4-acetonitrile (64.5:35.5, v/v) as mobile phase. The assay was successfully applied to a randomized, two-period cross-over bioequivalence study in 20 healthy Chinese volunteers following a single oral dose of 250 mg flucloxacillin capsules. A non-compartmental method was used for pharmacokinetic analysis. Compared with data in the literature, flucloxacillin was eliminated more slowly in Chinese than in Caucasians. Cmax, AUC(0-t) and AUC(0-infinity) were tested for bioequivalence after log-transformation of data. No significant difference was found. Tmax was analyzed by Wilcoxon's test and no significant difference was obtained (P > 0.05). Based on these statistical inferences, the two formulations were judged to be bioequivalent and, thus, can be prescribed interchangeably.
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Affiliation(s)
- Q Zhou
- Division of Clinical Pharmacology, the 2nd Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang Province, China
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Chen Y, Yang C, Xie Z, Zou L, Ruan Z, Zhang X, Tang Y, Fei L, Jia Z, Wu Y. Expression of the novel co-stimulatory molecule B7-H4 by renal tubular epithelial cells. Kidney Int 2006; 70:2092-9. [PMID: 17051145 DOI: 10.1038/sj.ki.5001867] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Crosstalk between T cells and renal tubular epithelial cells (TECs) in the pathogenesis of tubular lesions, the most important sign of progressive renal diseases, has not been clarified. Previous work has shown that TECs harbor co-stimulatory signals that promote T-cell activation, which induces tubular lesions. Nevertheless, the expression and functional role of B7-H4, a recently identified co-stimulatory ligand of the B7 superfamily, in pathologic human kidneys is unclear. We investigated the expression of B7-H4 on cryostat renal biopsies from patients with idiopathic membranous nephropathy (n=20), immunoglobulin A nephropathy (n=19), lupus nephritis (n=16), and acute renal allograft rejection (n=15) using immunohistochemistry. In addition, we also analyzed TEC-associated B7-H4 in the regulation of T-cell activation. Immunohistological staining revealed that B7-H4 antigen is restricted to tubular epithelium and that the protein is prominent in sections with severe tubular lesions, although no correlation was observed between tubular B7-H4 expression and levels of serum creatinine, serum urea nitrogen concentration, and 24-h proteinuria in each type of nephropathy. In vitro, mixed lymphocyte reactions revealed that TEC-related B7-H4 promotes cytokine (interleukin-2 and interferon-gamma) production and proliferation of co-cultured T cells. Interestingly, the secretion of interleukin-2 by C10 T cell hybridomas also increased when C10 cells were co-cultured with the B7-H4-transgenic murine TEC line, 3M-1-secreting tubular epithelial cells (MCT) in the presence of the antigen hen egg lysozyme. Our results clearly show that TEC-associated B7-H4 induces T-cell activation and we propose that B7-H4 is a potential activator that promotes tubular lesion.
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Affiliation(s)
- Y Chen
- Laboratory of Immunoregulation, Institute of Immunology, PLA, The Third Military Medical University, Chongqing, PR China
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