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Bian B, Zhang B, Wong C, Dou L, Pan X, Wang H, Guo S, Zhang H, Zhang L. Recent Advances in Habenula Imaging Technology: A Comprehensive Review. J Magn Reson Imaging 2024; 59:737-746. [PMID: 37254969 DOI: 10.1002/jmri.28830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 05/13/2023] [Accepted: 05/16/2023] [Indexed: 06/01/2023] Open
Abstract
The habenula (Hb) is involved in many natural human behaviors, and the relevance of its alterations in size and neural activity to several psychiatric disorders and addictive behaviors has been presumed and investigated in recent years using magnetic resonance imaging (MRI). Although the Hb is small, an increasing number of studies have overcome the difficulties in MRI. Conventional structural-based imaging also has great defects in observing the Hb contrast with adjacent structures. In addition, more and more attention should be paid to the Hb's functional, structural, and quantitative imaging studies. Several advanced MRI methods have recently been employed in clinical studies to explore the Hb and its involvement in psychiatric diseases. This review summarizes the anatomy and function of the human Hb; moreover, it focuses on exploring the human Hb with noninvasive MRI approaches, highlighting strategies to overcome the poor contrast with adjacent structures and the need for multiparametric MRI to develop imaging markers for diagnosis and treatment follow-up. LEVEL OF EVIDENCE: 3 TECHNICAL EFFICACY STAGE: 2.
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Affiliation(s)
- BingYang Bian
- Department of Radiology, The First Hospital of Jilin University, Jilin Provincial Key Laboratory of Medical Imaging and Big Data, Radiology and Technology Innovation Center of Jilin Province, Jilin Provincial International Joint Research Center of Medical Artificial Intelligence, Changchun, Jilin, 130021, People's Republic of China
| | - Bei Zhang
- Department of Radiology, The First Hospital of Jilin University, Jilin Provincial Key Laboratory of Medical Imaging and Big Data, Radiology and Technology Innovation Center of Jilin Province, Jilin Provincial International Joint Research Center of Medical Artificial Intelligence, Changchun, Jilin, 130021, People's Republic of China
| | - ChinTing Wong
- Department of Nuclear Medicine, The First Hospital of Jilin University, Changchun, Jilin, 130021, People's Republic of China
| | - Le Dou
- Department of Radiology, The First Hospital of Jilin University, Jilin Provincial Key Laboratory of Medical Imaging and Big Data, Radiology and Technology Innovation Center of Jilin Province, Jilin Provincial International Joint Research Center of Medical Artificial Intelligence, Changchun, Jilin, 130021, People's Republic of China
| | - XingChen Pan
- Department of Radiology, The First Hospital of Jilin University, Jilin Provincial Key Laboratory of Medical Imaging and Big Data, Radiology and Technology Innovation Center of Jilin Province, Jilin Provincial International Joint Research Center of Medical Artificial Intelligence, Changchun, Jilin, 130021, People's Republic of China
| | - HongChao Wang
- Department of Radiology, The First Hospital of Jilin University, Jilin Provincial Key Laboratory of Medical Imaging and Big Data, Radiology and Technology Innovation Center of Jilin Province, Jilin Provincial International Joint Research Center of Medical Artificial Intelligence, Changchun, Jilin, 130021, People's Republic of China
| | - ShiYu Guo
- Department of Radiology, The First Hospital of Jilin University, Jilin Provincial Key Laboratory of Medical Imaging and Big Data, Radiology and Technology Innovation Center of Jilin Province, Jilin Provincial International Joint Research Center of Medical Artificial Intelligence, Changchun, Jilin, 130021, People's Republic of China
| | - HuiMao Zhang
- Department of Radiology, The First Hospital of Jilin University, Jilin Provincial Key Laboratory of Medical Imaging and Big Data, Radiology and Technology Innovation Center of Jilin Province, Jilin Provincial International Joint Research Center of Medical Artificial Intelligence, Changchun, Jilin, 130021, People's Republic of China
| | - Lei Zhang
- Department of Radiology, The First Hospital of Jilin University, Jilin Provincial Key Laboratory of Medical Imaging and Big Data, Radiology and Technology Innovation Center of Jilin Province, Jilin Provincial International Joint Research Center of Medical Artificial Intelligence, Changchun, Jilin, 130021, People's Republic of China
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Song TT, Mei YK, Liu Y, Wang XY, Guo SY, Ji DW, Wan B, Yuan W, Chen QA. Construction of Bridged Benzazepines via Photo-Induced Dearomatization. Angew Chem Int Ed Engl 2024; 63:e202314304. [PMID: 38009446 DOI: 10.1002/anie.202314304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2023] [Revised: 11/24/2023] [Accepted: 11/24/2023] [Indexed: 11/28/2023]
Abstract
Bridged benzazepine scaffolds, possessing unique structural and physicochemical activities, are widespread in various natural products and drugs. The construction of these skeletons often requires elaborate synthetic effort with low efficiency. Herein, we develop a simple and divergent approach for constructing various bridged benzazepines by a photocatalytic intermolecular dearomatization of naphthalene derivatives with readily available α-amino acids. The bridged motif is created via a cascade sequence involving photocatalytic 1,4-hydroaminoalkylation, alkene isomerization and cyclization. Interestingly, the diastereoselectivity can be regulated through different reaction modes in the cyclization step. Moreover, aminohydroxylation and its further bromination have also been demonstrated to access highly functionalized bridged benzazepines. Preliminary mechanistic studies have been performed to get insights into the mechanism. This method provides a divergent synthetic approach for construction of highly functionalized bridged benzazepines, which have been otherwise difficult to access.
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Affiliation(s)
- Ting-Ting Song
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
| | - Yong-Kang Mei
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Yan Liu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiao-Yu Wang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Shi-Yu Guo
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
| | - Ding-Wei Ji
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
| | - Boshun Wan
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
| | - Weiming Yuan
- Key Laboratory of Material Chemistry for Energy Conversion and Storage, Ministry of Education, Hubei Key Laboratory of Bioinorganic Chemistry and Materia Medica, School of Chemistry and Chemical Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China
| | - Qing-An Chen
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
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Hou WT, Shen CR, Peng J, Jiang LW, Guo SY, Qiu XR, Zhang Y, Shen H, Jiang YY, An MM. Mechanism of Action for an All-in-One Monoclonal Antibody Against Staphylococcus aureus Infection. J Infect Dis 2023; 228:1789-1799. [PMID: 37335928 DOI: 10.1093/infdis/jiad215] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 05/22/2023] [Accepted: 06/16/2023] [Indexed: 06/21/2023] Open
Abstract
Staphylococcus aureus is a major human pathogen associated with high mortality rates. The extensive use of antibiotics is associated with the rise of drug resistance, and exotoxins are not targeted by antibiotics. Therefore, monoclonal antibody (mAb) therapy has emerged as a promising solution to solve the clinical problems caused by refractory S aureus. Recent research suggests that the synergistic effects of several cytotoxins, including bicomponent toxins, are critical to the pathogenesis of S aureus. By comparing the amino acid sequences, researchers found that α-toxin and bicomponent toxins have high homology. Therefore, we aimed to screen an antibody, designated an all-in-one mAb, that could neutralize α-toxin and bicomponent toxins through hybridoma fusion. We found that this mAb has a significant pharmacodynamic effect within in vivo mouse models and in vitro experiments.
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Affiliation(s)
- Wei-Tong Hou
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Chen-Rui Shen
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Ji Peng
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Li-Wen Jiang
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Shi-Yu Guo
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Xi-Ran Qiu
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Yu Zhang
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Hui Shen
- Department of Clinical Laboratory Medicine, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Yuan-Ying Jiang
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Mao-Mao An
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
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Fang MR, Yan XZ, Ni JL, Gu YG, Meng L, Yuan LC, Cai HY, Wang LR, Qin JW, Cai Q, Zhang Y, Guo SY. Study of pharyngeal airway morphology with CBCT: Benefits of four premolar extraction orthodontic treatments. Niger J Clin Pract 2022; 25:1955-1962. [PMID: 36537450 DOI: 10.4103/njcp.njcp_1815_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
BACKGROUND AND AIM Four premolars extractions are routine procedures for correction of malocclusion, but will inevitably lead to a reduction of tongue space, whether this will weaken the pharyngeal airway remains a controversy. PATIENTS AND METHODS Cone-beam computed tomography (CBCT) radiographs of 80 patients who completed four premolar extraction orthodontic treatments were collected and divided into three anteroposterior skeletal groups according to the ANB (angle subspinale to nasion to supramentale) value. Linear, angular, cross-sectional area, and volumetric dimensions of the pharyngeal airway were measured using Dolphin Imaging 11.9 software. One-way analysis of variance and Pearson's correlation coefficient test were performed to assess the intergroup comparisons. Treatment changes were evaluated with two-sample t-tests. RESULTS In intergroup comparisons, vertical linear and cross-sectional area differences were identified in S-Go/N-Me, VD1, VD1/N-Me, VD2/N-Me, AA, OAA and OMINI (p<0.05), while other measurements showed no significant differences. Angle2, the tilting degree of the pharyngeal airway, showed a positive correlation with ANB (p<0.05). As for the treatment changes, a significant increase was found in the pharyngeal airway in the Class I group (OUA p<0.05, VD1 p<0.001, VD2 p<0.05) and Class II group (VD1 p<0.001. VD2, p<0.05), and inversely, a significant decrease was found in the pharyngeal airway in the Class III group (OAA p<0.05, OMINI p<0.05, OUA p<0.05). No volumetric difference was identified. Interestingly, regarding the preoperative pharyngeal airway size, values trended to the mean value significantly. CONCLUSION Four premolar extraction orthodontic treatments did not affect the pharyngeal airway volume except for the vertical liner and cross-sectional area dimensions. The trend of the gold standard suggested a positive influence of four premolar extraction orthodontic treatments.
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Affiliation(s)
- M R Fang
- Jiangsu Key Laboratory of Oral Diseases; Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University; Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, China
| | - X Z Yan
- Jiangsu Key Laboratory of Oral Diseases; Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University; Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, China
| | - J L Ni
- Jiangsu Key Laboratory of Oral Diseases; Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University; Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, China
| | - Y G Gu
- Department of Stomatology, Affiliated Hospital of Lian Yungang, Xuzhou Medical University, Lianyungang, China
| | - L Meng
- Jiangsu Key Laboratory of Oral Diseases; Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University; Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, China
| | - L C Yuan
- Jiangsu Key Laboratory of Oral Diseases; Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University; Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, China
| | - H Y Cai
- Jiangsu Key Laboratory of Oral Diseases; Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, China
| | - L R Wang
- Jiangsu Key Laboratory of Oral Diseases; Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, China
| | - J W Qin
- Jiangsu Key Laboratory of Oral Diseases; Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University; Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, China
| | - Q Cai
- Department of Stomatology, Changhai Hospital, Navy Medical University, Shanghai, China
| | - Y Zhang
- Jiangsu Key Laboratory of Oral Diseases; Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University; Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, China
| | - S Y Guo
- Jiangsu Key Laboratory of Oral Diseases; Department of Orthodontics, Affiliated Hospital of Stomatology, Nanjing Medical University; Jiangsu Province Engineering Research Center of Stomatological Translational Medicine, Nanjing, China
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Yang F, He GC, Sun SH, Song TT, Min XT, Ji DW, Guo SY, Chen QA. Selective C-S Bond Constructions Using Inorganic Sulfurs via Photoinduced Electron Donor-Acceptor Activation. J Org Chem 2022; 87:14241-14249. [PMID: 36219805 DOI: 10.1021/acs.joc.2c01750] [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: 11/30/2022]
Abstract
By complementing traditional transition metal catalysis, photoinduced catalysis has emerged as a versatile and sustainable way to achieve carbon-heteroatom bond formation. This work discloses a visible-light-induced reaction for the formation of a C-S bond from aryl halides and inorganic sulfuration agents via electron donor-acceptor (EDA) complex photocatalysis. Divergent formations of organic sulfide and disulfide have been demonstrated under mild conditions. Preliminary mechanistic studies suggest that visible-light-induced intracomplex charge transfer within the monosulfide-anion-containing EDA complex permits the C-S bond construction reactivity.
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Affiliation(s)
- Fan Yang
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
| | - Gu-Cheng He
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
| | - Shao-Han Sun
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
| | - Ting-Ting Song
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
| | - Xiang-Ting Min
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
| | - Ding-Wei Ji
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
| | - Shi-Yu Guo
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China
| | - Qing-An Chen
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, China.,University of Chinese Academy of Sciences, Beijing 100049, China
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Liu Y, Huang Z, Guo SY, Tian Y. [Research progress in the regulation and application prospects of exosomes on atherosclerotic diseases]. Zhonghua Xin Xue Guan Bing Za Zhi 2022; 50:610-614. [PMID: 35705473 DOI: 10.3760/cma.j.cn112148-20220419-00288] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Affiliation(s)
- Y Liu
- Department of Cardiology, First Affiliated Hospital, Harbin Medical University,Harbin 150001, China
| | - Z Huang
- Department of Cardiology, First Affiliated Hospital, Harbin Medical University,Harbin 150001, China
| | - S Y Guo
- Department of Cardiology, First Affiliated Hospital, Harbin Medical University,Harbin 150001, China
| | - Y Tian
- Department of Cardiology, First Affiliated Hospital, Harbin Medical University,Harbin 150001, China
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Jin Z, Dong YT, Liu S, Liu J, Qiu XR, Zhang Y, Zong H, Hou WT, Guo SY, Sun YF, Chen SM, Dong HQ, Li YY, An MM, Shen H. Potential of Polyethyleneimine as an Adjuvant To Prepare Long-Term and Potent Antifungal Nanovaccine. Front Immunol 2022; 13:843684. [PMID: 35651617 PMCID: PMC9149211 DOI: 10.3389/fimmu.2022.843684] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2021] [Accepted: 04/11/2022] [Indexed: 11/13/2022] Open
Abstract
Background Candida albicans infections are particularly prevalent in immunocompromised patients. Even with appropriate treatment with current antifungal drugs, the mortality rate of invasive candidiasis remains high. Many positive results have been achieved in the current vaccine development. There are also issues such as the vaccine's protective effect is not persistent. Considering the functionality and cost of the vaccine, it is important to develop safe and efficient new vaccines with long-term effects. In this paper, an antifungal nanovaccine with Polyethyleneimine (PEI) as adjuvant was constructed, which could elicit more effective and long-term immunity via stimulating B cells to differentiate into long-lived plasma cells. Materials and Methods Hsp90-CTD is an important target for protective antibodies during disseminated candidiasis. Hsp90-CTD was used as the antigen, then introduced SDS to "charge" the protein and added PEI to form the nanovaccine. Dynamic light scattering and transmission electron microscope were conducted to identify the size distribution, zeta potential, and morphology of nanovaccine. The antibody titers in mice immunized with the nanovaccine were measured by ELISA. The activation and maturation of long-lived plasma cells in bone marrow by nanovaccine were also investigated via flow cytometry. Finally, the kidney of mice infected with Candida albicans was stained with H&E and PAS to evaluate the protective effect of antibody in serum produced by immunized mice. Results Nanoparticles (NP) formed by Hsp90-CTD and PEI are small, uniform, and stable. NP had an average size of 116.2 nm with a PDI of 0.13. After immunizing mice with the nanovaccine, it was found that the nano-group produced antibodies faster and for a longer time. After 12 months of immunization, mice still had high and low levels of antibodies in their bodies. Results showed that the nanovaccine could promote the differentiation of B cells into long-lived plasma cells and maintain the long-term existence of antibodies in vivo. After immunization, the antibodies in mice could protect the mice infected by C. albicans. Conclusion As an adjuvant, PEI can promote the differentiation of B cells into long-lived plasma cells to maintain long-term antibodies in vivo. This strategy can be adapted for the future design of vaccines.
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Affiliation(s)
- Zhao Jin
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Yi-Ting Dong
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Shuang Liu
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Jie Liu
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Xi-Ran Qiu
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Yu Zhang
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Hui Zong
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Wei-Tong Hou
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Shi-Yu Guo
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Yu-Fang Sun
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Si-Min Chen
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Hai-Qing Dong
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Yong-Yong Li
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Mao-Mao An
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Hui Shen
- Department of Clinical Laboratory Medicine, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
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Affiliation(s)
- Yong-Kang Mei
- Chinese Academy of Sciences Dalian Institute of Chemical Physics CHINA
| | - Xiang-Ting Min
- Chinese Academy of Sciences Dalian Institute of Chemical Physics CHINA
| | - Shi-Yu Guo
- Chinese Academy of Sciences Dalian Institute of Chemical Physics CHINA
| | - Chang-Hui Liu
- Chinese Academy of Sciences Dalian Institute of Chemical Physics CHINA
| | - Xiang-Xin Zhang
- Chinese Academy of Sciences Dalian Institute of Chemical Physics CHINA
| | - Ding-Wei Ji
- Chinese Academy of Sciences Dalian Institute of Chemical Physics CHINA
| | - Boshun Wan
- Chinese Academy of Sciences Dalian Institute of Chemical Physics CHINA
| | - Qing-An Chen
- Chinese Academy of Sciences Dalian Institute of Chemical Physics 457 Zhongshan Road 116023 Dalian CHINA
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Zhang Y, Liu YC, Chen SM, Zong H, Hou WT, Qiu XR, Guo SY, Sun YF, Jiang YY, An MM, Shen H. Evaluation of the in vitro Activity and in vivo Efficacy of Anidulafungin-Loaded Human Serum Albumin Nanoparticles Against Candida albicans. Front Microbiol 2022; 12:788442. [PMID: 34970244 PMCID: PMC8712755 DOI: 10.3389/fmicb.2021.788442] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Accepted: 11/24/2021] [Indexed: 01/03/2023] Open
Abstract
Recent decades have seen a significant increase in invasive fungal infections, resulting in unacceptably high mortality rates. Anidulafungin (AN) is the newest echinocandin and appears to have several advantages over existing antifungals. However, its poor water solubility and burdensome route of administration (i.e., repeated, long-term intravenous infusions) have limited its practical use. The objective of this study was to develop anidulafungin-loaded Human Serum Albumin (HSA) nanoparticles (NP) so as to increase both its solubility and antifungal efficacy. HSA was reduced using SDS and DTT, allowing liberation of free thiols to form the intermolecular disulfide network and nanoassembly. Reduced HSA was then added to MES buffer (0.1 M, pH 4.8) and magnetically stirred at 350 rpm and 25°C with AN (m/m 50:1) for 2 h to form nanoparticles (AN NP). We next performed routine antifungal susceptibility testing of Candida strains (n = 31) using Clinical and Laboratory Standards Institute (CLSI) methodologies. Finally, the in vivo efficacy of both AN and AN NP was investigated in a murine model of invasive infection by one of the most common fungal species—C. albicans. The results indicated that our carrier formulations successfully improved the water solubility of AN and encapsulated AN, with the latter having a particle size of 29 ± 1.5 nm with Polymer dispersity index (PDI) equaling 0.173 ± 0.039. In vitro AN NP testing revealed a stronger effect against Candida species (n = 31), with Minimum Inhibitory Concentration (MIC) values 4- to 32-fold lower than AN alone. In mice infected with Candida and having invasive candidiasis, we found that AN NP prolonged survival time (P < 0.005) and reduced fungal burden in kidneys compared to equivalent concentrations of free drug (P < 0.0001). In conclusion, the anidulafungin nanoparticles developed here have the potential to improve drug administration and therapeutic outcomes for individuals suffering from fungal diseases.
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Affiliation(s)
- Yu Zhang
- Department of Pharmacology, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Yan-Chao Liu
- Department of Pharmacology, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, China.,Department of Clinical Pharmacy, Shanghai General Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Si-Min Chen
- Department of Pharmacology, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Hui Zong
- Department of Pharmacology, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Wei-Tong Hou
- Department of Pharmacology, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Xi-Ran Qiu
- Department of Pharmacology, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Shi-Yu Guo
- Department of Pharmacology, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Yu-Fang Sun
- Department of Pharmacology, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Yuan-Ying Jiang
- Department of Pharmacology, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Mao-Mao An
- Department of Pharmacology, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, China
| | - Hui Shen
- Department of Clinical Laboratory Medicine, Shanghai Tenth People's Hospital, School of Medicine, Tongji University, Shanghai, China
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Duan MY, Zhu H, Wang H, Guo SY, Li H, Jiang LL, Li XT, Xie G, Ren BZ. Effects of water deficiency on preference and performance of an insect herbivore Ostrinia furnacalis. Bull Entomol Res 2021; 111:595-604. [PMID: 33998414 DOI: 10.1017/s0007485321000407] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
With further climate change still expected, it is predicted to increase the frequency with plants will be water stressed, which subsequently influences phytophagous insects, particularly Lepidoptera with limited mobility of larvae. Previous studies have indicated that oviposition preference and offspring performance of Lepidoptera insects are sensitive to drought separately. However, the integration of their two properties is not always seen. Here, we evaluated changes in oviposition selection and offspring fitness of a Lepidoptera insect under three water-stressed treatments using a model agroecosystem consisting of maize Zea mays, and Asian corn borer Ostrinia furnacalis. Results found that female O. furnacalis preferred to laying their eggs on well-watered maize, and then their offspring tended to survive better, attained bigger larvae mass, and developed more pupae and adults on the preferred maize. Oviposition selection of O. furnacalis positively correlated with height and leaf traits of maize, and offspring fitness positively related with water content and phytochemical traits of hosts. Overall, these results suggest that oviposition choice performed by O. furnacalis reflects the maximization of offspring fitness, supporting preference-performance hypothesis. This finding further highlights that the importance of simultaneous evaluation of performance and performance for water driving forces should be involved, in order to accurately predict population size of O. furnacalis under altered precipitation pattern.
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Affiliation(s)
- M Y Duan
- School of Life Sciences/Key Laboratory of Vegetation Ecology, Ministry of Education, Northeast Normal University, Changchun, China
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun, China
| | - H Zhu
- School of Life Sciences/Key Laboratory of Vegetation Ecology, Ministry of Education, Northeast Normal University, Changchun, China
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun, China
| | - H Wang
- School of Life Sciences/Key Laboratory of Vegetation Ecology, Ministry of Education, Northeast Normal University, Changchun, China
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun, China
| | - S Y Guo
- School of Life Sciences/Key Laboratory of Vegetation Ecology, Ministry of Education, Northeast Normal University, Changchun, China
| | - H Li
- School of Life Sciences/Key Laboratory of Vegetation Ecology, Ministry of Education, Northeast Normal University, Changchun, China
| | - L L Jiang
- School of Life Sciences/Key Laboratory of Vegetation Ecology, Ministry of Education, Northeast Normal University, Changchun, China
| | - X T Li
- School of Life Sciences/Key Laboratory of Vegetation Ecology, Ministry of Education, Northeast Normal University, Changchun, China
| | - G Xie
- School of Life Sciences/Key Laboratory of Vegetation Ecology, Ministry of Education, Northeast Normal University, Changchun, China
| | - B Z Ren
- School of Life Sciences/Key Laboratory of Vegetation Ecology, Ministry of Education, Northeast Normal University, Changchun, China
- Jilin Provincial Key Laboratory of Animal Resource Conservation and Utilization, Northeast Normal University, Changchun, China
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11
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Guan YQ, Min XT, He GC, Ji DW, Guo SY, Hu YC, Chen QA. The serendipitous effect of KF in Ritter reaction: Photo-induced amino-alkylation of alkenes. iScience 2021; 24:102969. [PMID: 34466792 PMCID: PMC8383004 DOI: 10.1016/j.isci.2021.102969] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 07/28/2021] [Accepted: 08/06/2021] [Indexed: 12/04/2022] Open
Abstract
Ritter reaction has been recognized as an elegant strategy to construct the C−N bond. Its key feature is forming the carbocation for nucleophilic attack by nitriles. Herein, we report a complementary visible-light-induced three-component Ritter reaction of alkenes, nitriles, and α-bromo nitriles/esters, thereby providing mild and rapid access to various γ-amino nitriles/acids. Mechanistic studies indicated that traceless fluoride relay, transforming KF into imidoyl fluoride intermediate, is critical for the efficient reaction switch from atom transfer radical addition (ATRA) to the Ritter reaction. This approach to amino-alkylation of alkenes is chemoselective and operationally simple. Using light irradiation to promote amino-alkylation of alkenes Using KF to facilitate three-component Ritter reaction Access functionalized amides under mild conditions
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Affiliation(s)
- Yu-Qing Guan
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Xiang-Ting Min
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Gu-Cheng He
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.,University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ding-Wei Ji
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Shi-Yu Guo
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Yan-Cheng Hu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China
| | - Qing-An Chen
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.,University of Chinese Academy of Sciences, Beijing 100049, China
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12
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Ge J, Zhao TT, Wan CY, Xia JY, Guo SY, Yu MX, Chen J, Wang Y, Xu KL, Li ZY. [Comparison of single infusion of anti-BCMA versus combined infusion of anti-CD19 chimeric antigen receptor T cells for immune reconstruction in relapsed/refractory multiple myeloma]. Zhonghua Xue Ye Xue Za Zhi 2021; 42:733-738. [PMID: 34753227 PMCID: PMC8607032 DOI: 10.3760/cma.j.issn.0253-2727.2021.09.004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: We observed and compared the differences in immune reconstruction between single-infusion anti-B-cell maturation antigen (BCMA) , chimeric antigen receptor T cells (CAR-T) , and combined infusion of anti-CD19 CAR-T cells in the treatment of recurrent/refractory multiple myeloma (RRMM) . Methods: Sixty-one patients with RRMM who underwent CAR-T cell therapy in our hospital from June 2017 to December 2020 were selected. Among them, 26 patients received anti-BCMA target, and 35 patients received anti-BCMA combined with anti-CD19 target. Using flow cytometry, we determined T cell subsets (CD3(+), CD4(+), CD8(+), CD4(+)/CD8(+)) , B cells (CD19(+)) , and NK cells (CD16(+) CD56(+)) at different time points before and after CAR-T treatment, and detected immunoglobulin IgG, IgA and IgM levels by immunoturbidimetry. We compared the reconstruction rules of lymphocyte subsets and immunoglobulins in the two groups. Results: CD8(+) T lymphocytes recovered most rapidly after the infusion of CAR-T cells, returning to pre-infusion levels at 3 months and 1 month after infusion, respectively[BCMA: 695 (357, 1264) /μl vs 424 (280, 646) /μl; BCMA+CD19: 546 (279, 1672) /μl vs 314 (214, 466) /μl]. NK cells returned to normal levels at 3 months after infusion in both groups[BCMA: 171 (120, 244) /μl, BCMA+CD19: 153 (101, 218) /μl (Normal reference range 150-1100/μl) ]; however, the NK cells were not maintained at stable levels in the BCMA CAR-T cells group. The recovery of CD4(+) T lymphocytes in both groups was slow and remained persistently low within 12 months after infusion, and no recovery was observed in most patients. The reversal of the ratio of CD4(+)/CD8(+) lasted for more than a year. The levels of CD19(+) B cells in both groups returned to baseline 3 months after infusion[BCMA: 62 (10, 72) /μl vs 57 (24, 78) /μl; BCMA+CD19: 40 (4, 94) /μl vs 29 (14, 46) /μl]. IgG returned to the pre-infusion level 12 months after infusion in the group with anti-BCMA cells alone, but not in the group with combined infusion of CD19 CAR T cells[7.82 (6.03, 9.64) g/L vs 6.92 (4.62, 12.76) g/L]. IgA returned to pre-infusion levels at 9 and 12 months after infusion, respectively[BCMA: 0.46 (0.07, 0.51) g/L vs 0.22 (0.12, 4.01) g/L; BCMA+CD19: 0.46 (0.22, 0.98) g/L vs 0.27 (0.10, 0.53) g/L]. IgM in both groups returned to pre-infusion levels 6 months after infusion[BCMA: 0.43 (0.06, 0.60) g/L vs 0.20 (0.13, 0.37) g/L; BCMA+CD19: 0.53 (0.10, 0.80) g/L vs 0.16 (0.11, 0.28) g/L]. There was no significant difference in the indexes of lymphocyte subpopulation reconstruction and immunoglobulin recovery between the two groups at each time point. Conclusion: This study showed that in patients with RRMM treated with CAR-T cells, the appropriate target antigen can be selected without considering the difference of immune reconstruction between anti-BCMA CAR-T and combined anti-CD19 CAR-T therapy.
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Affiliation(s)
- J Ge
- Department of Hematology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China
| | - T T Zhao
- Department of Hematology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China
| | - C Y Wan
- Department of Hematology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China
| | - J Y Xia
- Department of Hematology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China
| | - S Y Guo
- Department of Hematology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China
| | - M X Yu
- Department of Hematology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China
| | - J Chen
- Department of Hematology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China
| | - Y Wang
- Department of Hematology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China
| | - K L Xu
- Department of Hematology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China
| | - Z Y Li
- Department of Hematology, the Affiliated Hospital of Xuzhou Medical University, Xuzhou 221002, China
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13
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Wang JW, Yuan YF, Zhang D, Zhu M, Mo CL, Guo SY. Constructing metal-organic framework-derived Mn 2O 3multishelled hollow nanospheres for high-performance cathode of aqueous zinc-ion batteries. Nanotechnology 2021; 32:435401. [PMID: 34280901 DOI: 10.1088/1361-6528/ac15cb] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Accepted: 07/18/2021] [Indexed: 06/13/2023]
Abstract
Herein, we successfully synthesize Mn2O3multishelled hollow nanospheres through simply oxidizing Mn-based metal-organic framework microspheres. The number of the shells reaches 4. Many cavities and nanograins are hidden underneath the shell. The multishelled hollow structure brings about a wide hierarchical mesopore size range, large pore volume (0.26 cm3g-1) and high specific surface area (117.6 m2g-1). The superior zinc-ion storage performance may be achieved. The reversible capacity reaches 453 mAh g-1at current density of 0.1 A g-1. After 500 cycles at 1 A g-1, the discharge capacity of 152.8 mAh g-1is still delivered. The discharge capacity at 1.5 A g-1stabilizes at 107 mAh g-1. The zinc storage process is further studied through kinetics analyses. It is found that in the zinc storage process, ion diffusion process and capacitive process occur simultaneously, and the capacitive process is dominant. The excellent electrochemical performance is mainly attributed to the multishelled hollow nanosphere structure of Mn2O3. This structure promotes contact of electrode materials/electrolyte, offers more active sites, facilitates infiltration of electrolyte, buffer volume change of Mn2O3, improving electrochemical activity, reaction kinetics and cycling performance of Mn2O3. Overall, Mn2O3multishelled hollow nanosphere is an excellent cathode material for aqueous zinc-ion batteries.
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Affiliation(s)
- J W Wang
- College of Machinery and Automation, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China
| | - Y F Yuan
- College of Machinery and Automation, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China
| | - D Zhang
- Hang Zhou City of Quality and Technical Supervision and Testing Institute, Hangzhou 310019, People's Republic of China
| | - M Zhu
- College of Machinery and Automation, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China
| | - C L Mo
- College of Machinery and Automation, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China
| | - S Y Guo
- College of Machinery and Automation, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China
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14
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Chen L, Yuan YF, Du PF, Yin SM, Zhu M, Guo SY. Intimately coupled Mn 3O 4nanocrystalline@3D honeycomb hierarchical porous network scaffold carbon for high-performance cathode of aqueous zinc-ion batteries. Nanotechnology 2021; 32:405403. [PMID: 34225259 DOI: 10.1088/1361-6528/ac1131] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 07/05/2021] [Indexed: 06/13/2023]
Abstract
Herein, 3D honeycomb hierarchical porous network scaffold carbon is synthesized by a unique PVP-SiO2-boiling method with the boiling bubbles as soft template and SiO2nanospheres as hard template. Then MnO2nanosheets intimately grow on the carbon matrix and are further decomposed to Mn3O4nanocrystalline with size of 7-9 nm. The obtained Mn3O4nanocrystalline@3D honeycomb hierarchical porous network scaffold carbon has abundant mesopores and large specific surface area (92 m2g-1). When used as a cathode material for zinc-ion batteries, the synthesized composites exhibit high reversible capacity (546.2 mAh g-1at 0.5 A g-1), remarkable cycling stability (discharge capacity of 97.8 mAh g-1at 3 A g-1after 600 cycles) and superior rate capability (15.7 mAh g-1at 10 A g-1). The kinetics analyses indicate zinc storage mechanism includes diffusion process and capacitive process of Zn2+and H+ions, and the capacitive storage is dominant. The outstanding zinc storage performance benefits from the structural advantages. The unique carbon matrix improves electronic conductivity of Mn3O4, facilitates penetration of electrolyte, and well supports Mn3O4nanocrystalline. The small size and large specific surface area of Mn3O4nanocrystalline induce significant capacitive storage effect.
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Affiliation(s)
- L Chen
- College of Machinery and Automation, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China
| | - Y F Yuan
- College of Machinery and Automation, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China
| | - P F Du
- College of Textile Science and Engineering, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China
| | - S M Yin
- College of Machinery and Automation, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China
| | - M Zhu
- College of Machinery and Automation, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China
| | - S Y Guo
- College of Machinery and Automation, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China
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15
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Li YL, Dang H, Guo SY, Cao CL, Lü S, Xu J, Li SZ. [National surveillance of Oncomelania hupensis in China, 2015-2019]. Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi 2021; 33:127-132. [PMID: 34008358 DOI: 10.16250/j.32.1374.2020349] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVE To analyze the monitoring data of Oncomelania hupensis in the national schistosomiasis surveillance sites of China from 2015 to 2019, so as to understand the changes of Oncomelania snail status in the schistosomiasis-endemic areas of China and to provide the scientific evidence for Oncomelania snail control. METHODS According to the requirements of National Scheme for Schistosomiasis Surveillance in China (2014 Edition), national schistosomiasis surveillance sites were assigned in all schistosomiasis-endemic counties (cities, districts) and the potential endemic counties (cities, districts) in the Three Gorges Reservoir areas, and Oncomelania snail status was monitored according to different epidemic types. In endemic areas, Oncomelania snail survey was performed by means of systematic sampling and environmental sampling, and the occurrence of frames with Oncomelania snails and the prevalence of Schistosoma japonicum infections in Oncomelania snails were calculated, while in potential endemic areas, the risk of imported Oncomelania snails and Oncomelania snails in floating debris were monitored. RESULTS Oncomelania snail survey was performed covering an area of 116 834.16 hm2 in the national schistosomiasis surveillance of China from 2015 to 2019, with 35 007.62 hm2 Oncomelania snail habitats identified. A total of 6 908 292 frames were surveyed during the 5-year period, and there were 364 555 frames detected with Oncomelania snails, with a 5.28% mean occurrence of frames with Oncomelania snails. Among 997 508 living Oncomelania snails captured, no S. japonicum infections were detected, and loop-mediated isothermal amplification (LAMP) assay detected 18 positive mixed Oncomelania snail samples. During the period from 2015 to 2019, 147.20 hm2 emerging Oncomelania snail habitats were identified, with an overall tendency towards a rise seen in the proportion of emerging Oncomelania snail habitats in plain regions with waterway networks (0.12% to 92.00%), a tendency towards a rise followed by decline seen in marshland and lake regions (0 to 96.72%), and a large fluctuation in hilly regions (0 to 88.49%). A total of 831.10 hm2 re-emerging Oncomelania snail habitats were found in the national schistosomiasis surveillance sites of China from 2015 to 2019, with an overall tendency towards a rise seen in the proportion of re-emerging Oncomelania snail habitats in marshland and lake regions (16.05% to 79.66%), an overall tendency towards a decline seen in hilly regions (19.25% to 81.00%), and a minor fluctuation in plain regions with waterway networks (1.10% to 10.14%). During the 5-year period from 2015 to 2019, a total of 48 656 kg floating debris were captured in 4 surveillance sites in the Three Gorges Reservoir areas, and 2 204 snails were found, with no Oncomelania snails identified. CONCLUSIONS The areas of Oncomelania snail habitats tended to be stable in the national schistosomiasis surveillance sites of China during the period from 2015 to 2019, however, there was a gradual rise in the area of Oncomelania snail habitats year by year, and LAMP assay identified positive Oncomelania snail samples, suggesting Oncomelania snail control is far from optimistic in China.
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Affiliation(s)
- Y L Li
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research); NHC Key Laboratory of Parasite and Vector Biology; WHO Collaborating Centre for Tropical Diseases; National Center for International Research on Tropical Diseases, Shanghai 200025, China
| | - H Dang
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research); NHC Key Laboratory of Parasite and Vector Biology; WHO Collaborating Centre for Tropical Diseases; National Center for International Research on Tropical Diseases, Shanghai 200025, China
| | - S Y Guo
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research); NHC Key Laboratory of Parasite and Vector Biology; WHO Collaborating Centre for Tropical Diseases; National Center for International Research on Tropical Diseases, Shanghai 200025, China
| | - C L Cao
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research); NHC Key Laboratory of Parasite and Vector Biology; WHO Collaborating Centre for Tropical Diseases; National Center for International Research on Tropical Diseases, Shanghai 200025, China
| | - S Lü
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research); NHC Key Laboratory of Parasite and Vector Biology; WHO Collaborating Centre for Tropical Diseases; National Center for International Research on Tropical Diseases, Shanghai 200025, China
| | - J Xu
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research); NHC Key Laboratory of Parasite and Vector Biology; WHO Collaborating Centre for Tropical Diseases; National Center for International Research on Tropical Diseases, Shanghai 200025, China
| | - S Z Li
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research); NHC Key Laboratory of Parasite and Vector Biology; WHO Collaborating Centre for Tropical Diseases; National Center for International Research on Tropical Diseases, Shanghai 200025, China
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16
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Chen SM, Zou Z, Guo SY, Hou WT, Qiu XR, Zhang Y, Song LJ, Hu XY, Jiang YY, Shen H, An MM. Preventing Candida albicans from subverting host plasminogen for invasive infection treatment. Emerg Microbes Infect 2020; 9:2417-2432. [PMID: 33115324 PMCID: PMC7646593 DOI: 10.1080/22221751.2020.1840927] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Candida albicans is a common fungal pathogen in humans that colonizes the skin and mucosal surfaces of the majority healthy individuals. How C. albicans disseminates into the bloodstream and causes life-threatening systemic infections in immunocompromised patients remains unclear. Plasminogen system activation can degrade a variety of structural proteins in vivo and is involved in several homeostatic processes. Here, for the first time, we characterized that C. albicans could capture and “subvert” host plasminogen to invade host epithelial cell surface barriers through cell-wall localized Eno1 protein. We found that the “subverted” plasminogen system plays an important role in development of invasive infection caused by C. albicans in mice. Base on this finding, we discovered a mouse monoclonal antibody (mAb) 12D9 targeting C. albicans Eno1, with high affinity to the 254FYKDGKYDL262 motif in α-helices 6, β-sheet 6 (H6S6) loop and direct blocking activity for C. albicans capture host plasminogen. mAb 12D9 could prevent C. albicans from invading human epithelial and endothelial cells, and displayed antifungal activity and synergistic effect with anidulafungin or fluconazole in proof-of-concept in vivo studies, suggesting that blocking the function of cell surface Eno1 was effective for controlling invasive infection caused by Candida spp. In summary, our study provides the evidence of C. albicans invading host by “subverting” plasminogen system, suggesting a potential novel treatment strategy for invasive fungal infections.
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Affiliation(s)
- Si-Min Chen
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, People's Republic of China
| | - Zui Zou
- Department of Anesthesiology, Changzheng Hospital, Second Military Medical University, Shanghai, People's Republic of China
| | - Shi-Yu Guo
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, People's Republic of China
| | - Wei-Tong Hou
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, People's Republic of China
| | - Xi-Ran Qiu
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, People's Republic of China
| | - Yu Zhang
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, People's Republic of China
| | - Li-Jun Song
- Department of Anesthesiology, Changzheng Hospital, Second Military Medical University, Shanghai, People's Republic of China
| | - Xin-Yu Hu
- Department of Anesthesiology, Changzheng Hospital, Second Military Medical University, Shanghai, People's Republic of China
| | - Yuan-Ying Jiang
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, People's Republic of China
| | - Hui Shen
- Department of Laboratory Diagnosis, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, People's Republic of China
| | - Mao-Mao An
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, People's Republic of China
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17
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Han XM, Huang F, Jiao ML, Liu HR, Zhao ZH, Zhan HQ, Guo SY. Antidepressant Activity of Euparin: Involvement of Monoaminergic Neurotransmitters and SAT1/NMDAR2B/BDNF Signal Pathway. Biol Pharm Bull 2020; 43:1490-1500. [PMID: 32788507 DOI: 10.1248/bpb.b20-00093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Depression is the most significant risk factor for suicide, yet the causes are complex and disease mechanism remains unclear. The incidence and disability rate of depression are very high and the efficacy of some traditional antidepressants is not completely satisfactory. Recently, some studies have found that benzofurans have anti-oxidation and anti-monoamine oxidase properties, which are related to depression. Euparin is a monomer compound of benzofuran, previous work by our team found that it improves the behavior of depressed mice. However, additional antidepressant effects and mechanisms of Euparin have not been reported. In this study, the Chronic Unpredictable Mild Stress (CUMS) model of mice was used to further investigate the effect and mechanism of Euparin on depression. Results showed that Euparin (8, 16 and 32 mg/kg) reduced depression-like behavior in mice compared with the model group. Meanwhile, all doses of Euparin were found to increase the contents of monoamine neurotransmitter and decrease monoamine oxidase and reactive oxygen species (ROS) levels in brain of depression mice. Additionally, Euparin restored CUMS-induced decrease of Spermidine/Spermine N1-Acetyltransferase 1 (SAT1), N-methyl-D-aspartate receptor subtype 2B (NMDAR2B) and brain derived neurotrophic factor (BDNF) expression. These findings demonstrate that Euparin has antidepressant properties, and its mechanism involves the SAT1/NMDAR2B/BDNF signaling pathway.
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Affiliation(s)
- Xu-Meng Han
- Department of Pharmacology, College of Pharmacy, Xinxiang Medical University
| | - Feng Huang
- Department of Pharmacology, College of Pharmacy, Xinxiang Medical University
| | - Ming-Li Jiao
- Department of Pharmacology, College of Pharmacy, Xinxiang Medical University
| | - Hui-Ru Liu
- Department of Pharmacology, College of Pharmacy, Xinxiang Medical University
| | - Zheng-Hang Zhao
- Department of Pharmacology, School of Basic Medicine Sciences, Xi'an Jiaotong University Health Science Center
| | - He-Qin Zhan
- Department of Pharmacology, College of Pharmacy, Xinxiang Medical University
| | - Shi-Yu Guo
- Department of Pharmacology, College of Pharmacy, Xinxiang Medical University
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18
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Shen H, Yu Y, Chen SM, Sun JJ, Fang W, Guo SY, Hou WT, Qiu XR, Zhang Y, Chen YL, Wang YD, Hu XY, Lu L, Jiang YY, Zou Z, An MM. Dectin-1 Facilitates IL-18 Production for the Generation of Protective Antibodies Against Candida albicans. Front Microbiol 2020; 11:1648. [PMID: 32765468 PMCID: PMC7378971 DOI: 10.3389/fmicb.2020.01648] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2020] [Accepted: 06/25/2020] [Indexed: 02/05/2023] Open
Abstract
Invasive candidiasis (IC) is one of the leading causes of death among immunocompromised patients. Because of limited effective therapy treatment options, prevention of IC through vaccine is an appealing strategy. However, how to induce the generation of direct candidacidal antibodies in host remains unclear. Gpi7 mutant C. albicans is an avirulent strain that exposes cell wall β-(1,3)-glucans. Here, we found that vaccination with the gpi7 mutant strain could protect mice against invasive candidiasis caused by C. albicans and non-albicans Candida spp. The protective effects induced by gpi7 mutant relied on long-lived plasma cells (LLPCs) secreting protective antibodies against C. albicans. Clinically, we verified a similar profile of IgG antibodies in the serum samples from patients recovering from IC to those from gpi7 mutant-vaccinated mice. Mechanistically, we found cell wall β-(1,3)-glucan of gpi7 mutant facilitated Dectin-1 receptor dependent nuclear translocation of non-canonical NF-κB subunit RelB in macrophages and subsequent IL-18 secretion, which primed protective antibodies generation in vivo. Together, our study demonstrate that Dectin-1 engagement could trigger RelB activation to prime IL-18 expression and established a new paradigm for consideration of the link between Dectin-1 mediated innate immune response and adaptive humoral immunity, suggesting a previously unknown active vaccination strategy against Candida spp. infection.
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Affiliation(s)
- Hui Shen
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China.,Department of Laboratory Diagnosis, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Yuetian Yu
- Department of Rheumatology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Department of Critical Care Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Si-Min Chen
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Juan-Juan Sun
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Wei Fang
- Department of Anesthesiology, Changzheng Hospital, Second Military Medical University, Shanghai, China
| | - Shi-Yu Guo
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Wei-Tong Hou
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Xi-Ran Qiu
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Yu Zhang
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Yuan-Li Chen
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Yi-Da Wang
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Xin-Yu Hu
- Department of Anesthesiology, Changzheng Hospital, Second Military Medical University, Shanghai, China
| | - Liangjing Lu
- Department of Rheumatology, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Yuan-Ying Jiang
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
| | - Zui Zou
- Department of Anesthesiology, Changzheng Hospital, Second Military Medical University, Shanghai, China
| | - Mao-Mao An
- Department of Pharmacology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
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Zheng YQ, Yuan YF, Tong ZW, Yin H, Yin SM, Guo SY. Watermelon-like TiO 2 nanoparticle (P25)@microporous amorphous carbon sphere with excellent rate capability and cycling performance for lithium-ion batteries. Nanotechnology 2020; 31:215407. [PMID: 32032007 DOI: 10.1088/1361-6528/ab73be] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
To overcome the inferior rate capability and cycling performance of TiO2 nanomaterials as an anode material of lithium-ion batteries, we encapsulate TiO2 nanoparticles (P25) in carbon spheres through a facile pyrrole polymerization and carbonization. Material characterization demonstrates TiO2 nanoparticles are uniformly embedded in microporous amorphous carbon spheres, forming a watermelon-like structure. P25@C exhibits excellent high rate capability with average discharge capacity of 496, 416, 297, 240, 180, 99, 49 and 25 mAh g-1 at current rate of 0.5C, 1C, 5C, 10C, 20C, 50C, 100C and 200C, which shows superior long-term cycling performance with discharge capacity of 106.9 mAh g-1 at 20C after 5000 cycles. The capacity loss rate is only 0.008% per cycle. The outstanding lithium storage performance is ascribed to the watermelon-like composite structure, which remarkably improves electronic conductivity and structure stability of TiO2 nanoparticles. More importantly, the agglomeration of TiO2 nanoparticles is eliminated, and the entire surface of every TiO2 nanoparticle participates in the electrochemical reaction, which brings about an intense capacitive Li storage effect and leads to the high specific capacity and excellent rate capability of P25@C. This is confirmed through qualitative and quantitative analysis of the contributions from surface capacitive storage and bulk intercalation storage to the total capacity of the composite.
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Affiliation(s)
- Y Q Zheng
- College of Machinery and Automation, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China
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Wang L, Yuan YF, Chen Q, Zheng YQ, Yin SM, Guo SY. Construction of Co 3O 4 three-dimensional mesoporous framework structures from zeolitic imidazolate framework-67 with enhanced lithium storage properties. Nanotechnology 2019; 30:435402. [PMID: 31300617 DOI: 10.1088/1361-6528/ab31ec] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
High-porosity mesoporous framework structures are attractive for electrochemical energy storage and other applications. Herein we demonstrate a novel synthesis strategy to make zeolitic imidazolate framework-67 oxidize to a Co3O4 three-dimensional mesoporous framework structure. This strategy relies on the oxygen-limitation effect of the closed nanocage and the affinity effect of polyvinylpyrrolidone towards zeolitic imidazolate framework-67. Several TiO2 nanospheres, as the unique structure junctions, are uniformly embedded within the Co3O4 framework to enhance the framework strength. The TiO2/hydrous titania polyhedron nanocage, as the protecting shell, further encapsulates the Co3O4 framework, forming a perfect capsule-type hybrid. As anode materials for lithium-ion batteries, TiO2@Co3O4 framework capsules show superior lithium storage performance with high reversible capacity, stable cycling life and good rate capability. A reversible capacity of 1042 mAh g-1 can be delivered after 200 cycles at a current density of 300 mA g-1. The average discharge capacity over 200 cycles reaches 926 mAh g-1. This demonstrates the superiority of this material structure and its great potential as an anode for high-performance lithium-ion batteries. This work indicates a new strategy to take advantage of metal-organic frameworks to synthesize their mesoporous framework derivatives.
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Affiliation(s)
- L Wang
- College of Machinery and Automation, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China
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Wang L, Yuan YF, Zhang XT, Chen Q, Guo SY. Co 3O 4 hollow nanospheres/carbon-assembled mesoporous polyhedron with internal bubbles encapsulating TiO 2 nanosphere for high-performance lithium ion batteries. Nanotechnology 2019; 30:355401. [PMID: 31067517 DOI: 10.1088/1361-6528/ab2002] [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] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Co3O4 hollow nanospheres 15 nm in the diameter were assembled to the mesoporous polyhedron together with carbon. Within the Co3O4 polyhedrons, the bubbles 300-500 nm in diameter were uniformly generated. Every bubble further encapsulated one TiO2 nanosphere, forming a unique sphere-bubble structure. The specific surface area and the pore volume were calculated to be 97.85 and 0.31 cm3 g-1. When evaluated as anode material for lithium ion batteries, the as-prepared material exhibited superior lithium storage properties with high specific capacity, excellent cycling stability and good rate capability. After 400 cycles, the discharge capacity of 609 mAh g-1 was still delivered at current density of 335 mA g-1. Even at a high current density of 2000 mA g-1, the reversible capacity reached 296 mAh g-1. The outstanding electrochemical performance was attributed to the unique hybrid structure, which avoids nanomaterial aggregation, promotes ion diffusion and electron transfer, accommodates volume change of Co3O4 during (de)lithiation process, enhances structure strength, cycling stability and space utilization ratio of the hollow material.
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Affiliation(s)
- L Wang
- College of Machinery and Automation, Zhejiang Sci-Tech University, Hangzhou 310018, People's Republic of China
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Guo SY, Zhang Y, Liu B. [Meniere' s disease and allergy]. Lin Chung Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2019; 33:470-473. [PMID: 31163563 DOI: 10.13201/j.issn.1001-1781.2019.05.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 09/28/2018] [Indexed: 11/12/2022]
Abstract
Meniere' s disease is a clinical syndrome that consists of episodes of spontaneous vertigo usually associated with unilateral fluctuating sensorineural hearing loss, tinnitus, and aural fullness. The pathogenesis remains unknown, and the underlying pathophysiologic state in Meniere' s disease is endolymphatic hydrops. Allergy is thought to be one of the etiologic factors. The present study examined whether subjects with Meniere' s disease have pathological immune reaction related to type Ⅰ allergy.
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Wang L, Ren MM, Jian YL, Meng BX, Ma FL, Wang WJ, Guo SY. [Experimental studies on the repair and restitution of cartilage by cartilage acellular extracellular matrix and adipose tissue-derived stem cells]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2019; 54:133-138. [PMID: 30776866 DOI: 10.3760/cma.j.issn.1673-0860.2019.02.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the effects of the repair and restitution of ear-shaped cartilage by adipose tissue-derived stem cells(ADSC) and cartilage acellular extracellular matrix. Methods: ADSC were extracted by digesting with collagenase type II from the adipose tissue from 32 patients with adiposity whose fats were drawn, and were cultured and subcultured in vitro. The natural biological scaffolds were prepared by acellular method using porcine ear cartilage, and then the second generation ADSC(5.0×10(7)/ml) were inoculated on the preformed natural bio-scaffold scaffold by culturing in vitro for 3 days to form a cell scaffold complex. 32 New Zealand white rabbits were randomly divided into the experimental groups, the control group A, the control group B and the control group C. All New Zealand white rabbits were modeled by ear cartilage defects. The cell scaffolds composite was implanted into the experimental group of the ear cartilage defects of rabbits, the ADSC were implanted into the control group A, the cartilage acellular extracellular matrix scaffold was implanted into the control group B and the control group C was modeled only by ear cartilage defects. After 16 weeks, the animals were sacrificed and the repair effect was observed by gross appearance and histological examinations including HE, Toluidine blue staining, Safranin O and typeⅡ collagen staining. Its were quantitatively analyzed by positive staining results of type Ⅱ collagen. Ear cartilage tissue elasticity was detected. SPSS 17.0 software was used to analyze the data. Results: The cartilage defects in the experimental group were repaired well by general shape observation and those in the control group was filled in with granulation tissue. There were significant differences between the experimental group and the control group in the wet weight(P<0.05). HE staining showed that cartilage cavities formed in articular cartilage defects, and only the fibrous tissue was filled with the ear cartilage defect in the control groups. In the repair area, Toluidine blue staining, Safranin O and type Ⅱ collagen staining were positive in the experimental group, and negative in the control groups. There was no significant difference between the experimental group and the normal ear cartilage in the ear cartilage elastic constant detection(P>0.05). Conclusions: The mechanics and histology of rabbit ear neonatal cartilage constructed by ADSC combined with cartilage acellular matrix are close to normal ear cartilage. Cartilage acellular matrix material combined with adipose-derived stem cells has good repair and reconstruction ability for ear cartilage defects, which possesses potential clinical application value.
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Affiliation(s)
- L Wang
- Department of Plastic Surgery, the Second Affiliated Hospital of Zhengzhou University, Zhengzhou 450014, China
| | - M M Ren
- Department of Plastic Surgery, the Second Affiliated Hospital of Zhengzhou University, Zhengzhou 450014, China
| | - Y L Jian
- Department of Plastic Surgery, the Second Affiliated Hospital of Zhengzhou University, Zhengzhou 450014, China
| | - B X Meng
- Department of Plastic Surgery, the Second Affiliated Hospital of Zhengzhou University, Zhengzhou 450014, China
| | - F L Ma
- Department of Plastic Surgery, the Second Affiliated Hospital of Zhengzhou University, Zhengzhou 450014, China
| | - W J Wang
- Department of Pharmacy, the Second Affiliated Hospital of Zhengzhou University, Zhengzhou 450014, China
| | - S Y Guo
- Department of Ophthalmology, the Second Affiliated Hospital of Zhengzhou University, Zhengzhou 450014, China
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Abstract
Inner ear disease is characterized by tinnitus, deafness and vertigo. The pathogenesis remains unknown. In the past, it is considered to be related to vascular disease such as thrombus and hemadostenosis.However, more and more researches indicate that it may be associated with multiple factors mediated by allergy. This paper reviews some possible pathogenesis of Meniere disease, including type Ⅰ allergy, autoimmunity, circulating immune complex and immune genetic.
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Affiliation(s)
- S Y Guo
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing Institute of Otorhinolaryngology, Key Laboratory of Otolaryngology Head and Neck Surgery (Capital Medical University), Ministry of Education , Beijing 100730, China
| | - Y Zhang
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing Institute of Otorhinolaryngology, Key Laboratory of Otolaryngology Head and Neck Surgery (Capital Medical University), Ministry of Education , Beijing 100730, China
| | - B Liu
- Department of Otorhinolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing Institute of Otorhinolaryngology, Key Laboratory of Otolaryngology Head and Neck Surgery (Capital Medical University), Ministry of Education , Beijing 100730, China
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Tina RR, Shan XR, Wang Y, Guo SY, Mao B, Wang W, Wu HY, Zhao TH. Response of antioxidant system to drought stress and re-watering in Alfalfa during branching. ACTA ACUST UNITED AC 2017. [DOI: 10.1088/1755-1315/94/1/012129] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Li X, Li FL, Lu Y, Zhu YM, Guo SY, Li YJ, Jiang CY. [Clinical study on locking plate for the treatment of non-osteoporotic complex proximal humeral fractures]. Beijing Da Xue Xue Bao Yi Xue Ban 2017; 49:855-860. [PMID: 29045969] [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: 06/07/2023]
Abstract
OBJECTIVE To describe long-term results of locking plate used for the treatment of non-osteoporotic fresh three- and four-part proximal humeral fractures with at least 2 years follow-up. METHODS The functional outcomes and the complications of non-osteoporotic three- and four-part fresh proximal humeral fractures treated with locking plate were assessed retrospectively. The active range of motion, the Constant score, the University of California at Los Angeles (UCLA) shoulder score, the visual analogue score (VAS) were employed to evaluate the postoperative shoulder function, and the radiographic images were taken to evaluate the neck-shaft angle of the proximal humeral and postoperative implant-related complications. RESULTS From January 2007 to October 2014, 107 consecutive fresh three- and four-part non-osteoporotic fresh proximal humeral fractures were treated with a locking plate in our department. Among them, 67 patients completed at least 2 years follow-up. The average follow-up time was (43.9±23.3) months (range: 24-108 months). The mean Constant score was 87.1±11.7 (range: 51-100), the mean UCLA score was 30.5±3.9 (range: 18-35), the mean VAS score was 1±2 (range: 0-7). The mean active forward flexion was 159.0°±19.3° (range: 80°-180°), the mean external rotation was 36.8°±19.5°(0°-80°) and the mean internal rotation was T11 level (T2-LS level). There were 11 patients who suffered from complications. Screw perforations were observed in 5 (7.5%) patients, avascular necrosis of the humeral head was observed in 9 (13.4%) patients and traumatic osteoarthritis was observed in 5 (7.5%) patients. Six patients showed two or more complications. There was no significant difference in outcomes when comparing the patients with three- part fractures (31 patients) with those with four-part fractures (36 patients). The rates of complications and avascular necrosis were significantly higher in the four-part fracture group than in the three-part fracture group. CONCLUSION The locking plate is an effective method in treating three- and four-part non-osteoporotic fresh proximal humeral fractures. Strict surgical indication and precise surgical skill are the key points for successful treating non-osteoporotic fresh proximal humeral fractures. There is a higher rate of complications and avascular necrosis of the humeral head in the four-part fractures than in the three-part fractures.
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Affiliation(s)
- X Li
- Department of Sports Medicine,Beijing Jishuitan Hospital, Beijing 100035, China
| | - F L Li
- Department of Sports Medicine,Beijing Jishuitan Hospital, Beijing 100035, China
| | - Y Lu
- Department of Sports Medicine,Beijing Jishuitan Hospital, Beijing 100035, China
| | - Y M Zhu
- Department of Sports Medicine,Beijing Jishuitan Hospital, Beijing 100035, China
| | - S Y Guo
- Department of Sports Medicine,Beijing Jishuitan Hospital, Beijing 100035, China
| | - Y J Li
- Department of Sports Medicine,Beijing Jishuitan Hospital, Beijing 100035, China
| | - C Y Jiang
- Department of Sports Medicine,Beijing Jishuitan Hospital, Beijing 100035, China
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Guo SY, Ding LY, Luo HB, Jiang XY. A Big-Data-based platform of workers' behavior: Observations from the field. Accid Anal Prev 2016; 93:299-309. [PMID: 26614050 DOI: 10.1016/j.aap.2015.09.024] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2015] [Revised: 09/25/2015] [Accepted: 09/29/2015] [Indexed: 05/27/2023]
Abstract
Behavior-Based Safety (BBS) has been used in construction to observe, analyze and modify workers' behavior. However, studies have identified that BBS has several limitations, which have hindered its effective implementation. To mitigate the negative impact of BBS, this paper uses a case study approach to develop a Big-Data-based platform to classify, collect and store data about workers' unsafe behavior that is derived from a metro construction project. In developing the platform, three processes were undertaken: (1) a behavioral risk knowledge base was established; (2) images reflecting workers' unsafe behavior were collected from intelligent video surveillance and mobile application; and (3) images with semantic information were stored via a Hadoop Distributed File System (HDFS). The platform was implemented during the construction of the metro-system and it is demonstrated that it can effectively analyze semantic information contained in images, automatically extract workers' unsafe behavior and quickly retrieve on HDFS as well. The research presented in this paper can enable construction organizations with the ability to visualize unsafe acts in real-time and further identify patterns of behavior that can jeopardize safety outcomes.
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Affiliation(s)
- S Y Guo
- School of Civil Engineering and Mechanics and Institute of Construction Management, Huazhong University of Science and Technology, Wuhan, China.
| | - L Y Ding
- School of Civil Engineering and Mechanics and Institute of Construction Management, Huazhong University of Science and Technology, Wuhan, China
| | - H B Luo
- School of Civil Engineering and Mechanics and Institute of Construction Management, Huazhong University of Science and Technology, Wuhan, China
| | - X Y Jiang
- School of Civil Engineering and Mechanics and Institute of Construction Management, Huazhong University of Science and Technology, Wuhan, China
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Jiao HW, Jia XX, Zhao TJ, Rong H, Zhang JN, Cheng Y, Zhu HP, Xu KL, Guo SY, Shi QY, Zhang H, Wang FY, Chen CF, Du L. Up-regulation of TDAG51 is a dependent factor of LPS-induced RAW264.7 macrophages proliferation and cell cycle progression. Immunopharmacol Immunotoxicol 2016; 38:124-30. [PMID: 26873343 DOI: 10.3109/08923973.2016.1138968] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [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: 11/13/2022]
Abstract
CONTEXT As a component of the outer membrane in Gram-negative bacteria, lipopolysaccharide (LPS)-induced proliferation and cell cycle progression of monocytes/macrophages. It has been suggested that the proapoptotic T-cell death-associated gene 51 (TDAG51) might be associated with cell proliferation and cell cycle progression; however, its role in the interaction between LPS and macrophages remains unclear. OBJECTIVE We attempted to elucidate the role(s) of TDAG51 played in the interaction between LPS and macrophages. MATERIALS AND METHODS We investigated TDAG51 expression in RAW264.7 cells stimulated with LPS and examined the effects of RNA interference-mediated TDAG51 down-regulation. We used CCK-8 assay and flow cytometry analysis to evaluate the interaction between TDAG51 and LPS-induced proliferation and cell cycle progression in RAW264.7 cells. RESULTS Our findings indicate that TDAG51 is up-regulated in LPS-stimulated RAW264.7 cells, the TDAG51 siRNA effectively reduced TDAG51 protein up-regulation following LPS stimulation in RAW264.7 cells, the significant changes of the proliferation and cell cycle progression of RAW264.7 cells in TDAG51 Knockdown RAW264.7 cells treated with LPS were observed. CONCLUSION These findings suggested that TDAG51 up-regulation is a dependent event during LPS-mediated proliferation and cell cycle progression, and which increase our understanding of the interaction mechanism between LPS and macrophages.
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Affiliation(s)
- Han-Wei Jiao
- a College of Agriculture, Hainan University, Hainan Key Lab of Tropical Animal Reproduction & Breeding and Epidemic Disease Research, Animal Genetic Engineering Key Lab of Haikou , Haidian Island , Haikou , People's Republic of China and
| | - Xiao-Xiao Jia
- a College of Agriculture, Hainan University, Hainan Key Lab of Tropical Animal Reproduction & Breeding and Epidemic Disease Research, Animal Genetic Engineering Key Lab of Haikou , Haidian Island , Haikou , People's Republic of China and
| | - Tian-Jing Zhao
- a College of Agriculture, Hainan University, Hainan Key Lab of Tropical Animal Reproduction & Breeding and Epidemic Disease Research, Animal Genetic Engineering Key Lab of Haikou , Haidian Island , Haikou , People's Republic of China and
| | - Hui Rong
- a College of Agriculture, Hainan University, Hainan Key Lab of Tropical Animal Reproduction & Breeding and Epidemic Disease Research, Animal Genetic Engineering Key Lab of Haikou , Haidian Island , Haikou , People's Republic of China and
| | - Jia-Ning Zhang
- a College of Agriculture, Hainan University, Hainan Key Lab of Tropical Animal Reproduction & Breeding and Epidemic Disease Research, Animal Genetic Engineering Key Lab of Haikou , Haidian Island , Haikou , People's Republic of China and
| | - Ying Cheng
- a College of Agriculture, Hainan University, Hainan Key Lab of Tropical Animal Reproduction & Breeding and Epidemic Disease Research, Animal Genetic Engineering Key Lab of Haikou , Haidian Island , Haikou , People's Republic of China and
| | - Hua-Pei Zhu
- a College of Agriculture, Hainan University, Hainan Key Lab of Tropical Animal Reproduction & Breeding and Epidemic Disease Research, Animal Genetic Engineering Key Lab of Haikou , Haidian Island , Haikou , People's Republic of China and
| | - Kai-Lian Xu
- a College of Agriculture, Hainan University, Hainan Key Lab of Tropical Animal Reproduction & Breeding and Epidemic Disease Research, Animal Genetic Engineering Key Lab of Haikou , Haidian Island , Haikou , People's Republic of China and
| | - Shi-Yu Guo
- a College of Agriculture, Hainan University, Hainan Key Lab of Tropical Animal Reproduction & Breeding and Epidemic Disease Research, Animal Genetic Engineering Key Lab of Haikou , Haidian Island , Haikou , People's Republic of China and
| | - Qiao-Yun Shi
- a College of Agriculture, Hainan University, Hainan Key Lab of Tropical Animal Reproduction & Breeding and Epidemic Disease Research, Animal Genetic Engineering Key Lab of Haikou , Haidian Island , Haikou , People's Republic of China and
| | - Hui Zhang
- b College of Animal Science and Technology, Shihezi University , North 4th Road, Shihezi , People's Republic of China
| | - Feng-Yang Wang
- a College of Agriculture, Hainan University, Hainan Key Lab of Tropical Animal Reproduction & Breeding and Epidemic Disease Research, Animal Genetic Engineering Key Lab of Haikou , Haidian Island , Haikou , People's Republic of China and
| | - Chuang-Fu Chen
- b College of Animal Science and Technology, Shihezi University , North 4th Road, Shihezi , People's Republic of China
| | - Li Du
- a College of Agriculture, Hainan University, Hainan Key Lab of Tropical Animal Reproduction & Breeding and Epidemic Disease Research, Animal Genetic Engineering Key Lab of Haikou , Haidian Island , Haikou , People's Republic of China and
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Li GQ, Zhang Y, Liu D, Qian YY, Zhang H, Guo SY, Sunagawa M, Hisamitsu T, Liu YQ. PI3 kinase/Akt/HIF-1α pathway is associated with hypoxia-induced epithelial-mesenchymal transition in fibroblast-like synoviocytes of rheumatoid arthritis. Mol Cell Biochem 2012; 372:221-31. [PMID: 23001847 DOI: 10.1007/s11010-012-1463-z] [Citation(s) in RCA: 76] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2012] [Accepted: 09/14/2012] [Indexed: 12/11/2022]
Abstract
Migration and invasion of fibroblast-like synoviocytes (FLSs) are critical in the pathogenesis of rheumatoid arthritis (RA). Hypoxic conditions are present in RA joints, and hypoxia has been extensively studied in angiogenesis and inflammation. However, its effect on the migration and invasion of RA-FLSs remains unknown. In this study, we observed that RA-FLSs exposed to hypoxic conditions experienced epithelial-mesenchymal transition (EMT), with increased cell migration and invasion. We demonstrated that hypoxia-induced EMT was accompanied by increased hypoxia-inducible factor (HIF)-1α expression and activation of Akt. After knockdown or inhibition of HIF-1α in hypoxia by small interfering RNA or genistein (Gen) treatment, the EMT transformation and invasion ability of FLSs were regained. HIF-1α could be blocked by phosphatidylinositol 3-kinase (PI3K) inhibitor, LY294002, indicating that HIF-1α activation was regulated by the PI3K/Akt pathway. Administration of LY294002 (20 mg/kg, intra-peritoneally) twice weekly and Gen (25 mg/kg, by gavage) daily for 3 weeks from day 20 after primary immunization in a collagen-induced arthritis rat model, markedly alleviated the clinical signs, radiology progression, synovial hyperplasia, and inflammatory cells infiltration of joints. Thus, results of this study suggest that activation of the PI3K/Akt/HIF-1α pathway plays a pivotal role in mediating hypoxia-induced EMT transformation and invasion of RA-FLSs under hypoxia.
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Affiliation(s)
- Guo-Qing Li
- Department of Rheumatology, Clinical Medical College, Yangzhou University, Yangzhou 225001, Jiangsu, China
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Sakaue S, Sunagawa M, Tanigawa H, Saito Y, Guo SY, Okada M, Nakamura A, Arai K, Hisamitsu T. [A single administration of morphine suppresses the reduction of the systemic immune activity caused by acute inflammatory pain in rats]. Masui 2011; 60:336-342. [PMID: 21485104] [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: 05/30/2023]
Abstract
BACKGROUND Pain accompanying various diseases as well as invasion and postoperative pain reduce immune activities, and affect the prognosis of diseases and recovery after surgery (metastasis and relapse). While, some anesthetics and synthetic narcotics used to reduce pain are reported to suppress immune activities depending on the kind of medication and the dosing strategy. However, it is not clear how the single use of narcotics affects the immune activity at the acute stage of severe inflammatory pain. This study is undertaken to examine the effect of a single administration of morphine on the splenic NK cell activity in the acute inflammatory pain model rats. METHODS Rats received a 50 microl s.c. injection of 4% formaldehyde into the plantar surface of the right hindpaw. The spleen was removed 2 hours later and the splenic NK-cell activity was measured by 51Cr release assay. RESULTS Acute pain significantly reduced the splenic NK cell activity, but the single administration of morphine suppressed its reduction. CONCLUSIONS It was indicated that the single administration of morphine could suppress the reduction of the systemic immune activity caused by acute inflammatory pain.
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Affiliation(s)
- Satoshi Sakaue
- Department of Physiology, School of Medicine, Showa University, Tokyo 142-8555
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31
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Sa ZY, Guo SY, Shan LD, Gong S, Gao H, Hisamitsu T, Jiang XH. [Nitric oxide promotes the differentiation of neural stem cells in vitro derived from the subventricular zone of neonatal rats]. Zhongguo Ying Yong Sheng Li Xue Za Zhi 2010; 26:359-364. [PMID: 21038692] [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: 05/30/2023]
Abstract
OBJECTIVE To observe the effect of nitric oxide (NO) on the differentiation of neural stem cells (NSCs) derived from subventricular zone (SVZ) of neonatal rats in vitro. METHODS Conventional method was used to isolate and culture the NSCs from SVZ. Diethylenetriamine/NO(DETA/NO) was used as NO donor and Nitro-L-arginine methylester (L-NAME) was used as inhibitor of nitric oxide synthase (NOS). The immunofluorescence was used to identify the expression of nestin (a marker of NSCs), beta-III-tubulin (Tuj-1, a marker of neurons), glial fibrillary acidic protein (GFAP, a marker of astrocytes) and nNOS. The concentration of NO in medium was measured by Greiss assay. RESULTS Cultured neurospheres were nestin-, BrdU- and nNOS-positive. After treatment with 40 micromol/L, 50 micromol/L and 60 micromol/L of DETA/NO for 5 days, the concentration of NO released was increased significantly (P < 0.01) as compared with that of the control group. The percentage of both differentiated neurons and astrocytes was increased significantly (P < 0.01 and P < 0.05) as compared with that of the control group. After treatment with 100 micromol/L, 150 micromol/L and 200 micromol/L of L-NAME for 5 days, the concentration of NO released was decreased as compared with that of the control group (P < 0.05). The percentage of both differentiated neurons and astrocytes were decreased as compared with that of the control group (P < 0.05). CONCLUSION NO could directly promote the differentiation of NSCs derived from rat subventricular zone in vitro.
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Affiliation(s)
- Zhe-Yan Sa
- Department of Neurobiology and Medical Psychology, Laboratory of Aging and Nervous Diseases, Medical College, Suzhou University, Suzhou 215123, China
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Gao YZ, Guo SY, Yin QZ, Hisamitsu T, Jiang XH. An individual variation study of electroacupuncture analgesia in rats using microarray. Am J Chin Med 2008; 35:767-78. [PMID: 17963317 DOI: 10.1142/s0192415x07005259] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The aim of the present study is to probe candidate genes which were involved in the electroacupuncture (EA) analgesia and to understand the molecular basis of the individual difference of EA analgesia in rats. We compared hypothalamus transcriptional profiles of responders with those of non-responders after 1 Hz EA treatment at ST36 acupoint for 1 hour by using oligonucleotide microarray. Responders and non-responders were determined by tail flick latency (TFL). A real-time quantitative RT-PCR was applied to validate the differential expressed genes. Our study provided a global hypothalamus transcriptional profile of EA analgesia in rats. We found that 63 and 3 genes were up- and down-regulated in the responder group, respectively. Half of the differentially expressed genes were classified into 9 functional groups which were ion transport, sensory perception, synaptogenesis and synaptic transmission, signal transduction, inflammatory response, apoptosis, transcription, protein amino acid phosphorylation and G-protein signaling. Glutamatergic receptors, ghrelin precursor, melanocortin 4 receptor (MC4-R) and neuroligin 1 were found to be up-regulated in the responder group which may become new targets for nociceptive study and deserve further investigation for developing new acupuncture therapy and intervention of pain modulation.
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Affiliation(s)
- Yu-Zhen Gao
- Department of Neurobiology, School of Medicine, Soochow University, Suzhou 215123, China
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Yu FP, Yuan DR, Kong LM, Duan XL, Guo SY, Wang XQ, Zhao X. Fluorescence properties of Dy(3+) doped La(3)Ga(5.5)Nb(0.5)O(14) nanocrystals. Nanotechnology 2008; 19:045705. [PMID: 21817522 DOI: 10.1088/0957-4484/19/04/045705] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The effects of Dy(3+) doping concentration and calcinations on the fluorescence properties of La(3)Ga(5.5)Nb(0.5)O(14) (Dy:LGN) nanocrystals were examined for the first time. High quality Dy:LGN nanocrystals were synthesized by the sol-gel method. The room temperature fluorescence spectra were measured; they showed a yellow emission, which can be attributed to the (4)F(9/2)-(6)H(13/2) transition. The relationship between the relative emission intensity and the doping concentration of the specimens, sintered at different temperatures, is consistent with a Gaussian distribution according a fitted and modified formula. The optimum value of the Dy(3+) doping concentration in LGN nanocrystals is in the range 2.0-2.5%. Moreover, in LGN bulk crystal for laser use, the optimum value, calculated through the obtained formula, is presumed in the range 1.5-2.0%. The fluorescent lifetime of a 2.0% Dy:LGN nanocrystal is quite short, only about 8.5 ns.
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Affiliation(s)
- F P Yu
- State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Jinan 250100, People's Republic of China
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Gao YZ, Guo SY, Yin QZ, Cui XQ, Hisamitsu T, Jiang XH. Possible involvement of integrin signaling pathway in the process of recovery from restraint stress in rats. Neurosci Bull 2008; 23:229-35. [PMID: 17687398 PMCID: PMC5550586 DOI: 10.1007/s12264-007-0034-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [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: 01/01/2023] Open
Abstract
OBJECTIVE To search novel genes or pathways involved in the recovery process after restraint stress in rats. METHODS We compared the hypothalamus transcriptional profiles of two different recovery patterns (fast recovery vs slow recovery) from restraint stress in rats using oligonucleotide microarray, the recovery pattern was determined by the decrement of plasma adrenocorticotropic-hormone (ACTH) and corticosterone levels during one hour recovery period after stress. A real-time quantitative RT-PCR was applied to validate the differential expressed genes. RESULTS Analysis of the microarray data showed that most of genes were not differentially expressed between fast recovery group and slow recovery group. Among the differentially expressed genes we found that talin, together with serine/threonine protein phosphatase PP1-beta catalytic subunit (PP-1B) and integrin alpha-6 precursor (VLA-6) genes, were at least 1.5 fold up-regulated in the fast recovery group, while junctional adhesion molecule 1 (F11r) was 1.5 fold down-regulated in the fast recovery group. CONCLUSION The results implied that integrin signaling pathway may be involved in the recovery from restraint stress in rats. The present study provided a global overview of hypothalamus transcriptional profiles during the process of recovery from the restraint stress in rats. The integrin signaling pathway seems to be involved in the recovery process, which deserves further study to clarify the integrin-mediated recovery mechanism after restraint stress.
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Affiliation(s)
- Yu-Zhen Gao
- Department of Neurobiology, Soochow University, Suzhou, 215123 China
- Laboratory of Aging and Nervous Diseases, School of Medicine, Soochow University, Suzhou, 215123 China
- Department of Physiology, School of Medicine, Showa University, Tokyo, 142 Japan
| | - Shi-Yu Guo
- Department of Neurobiology, Soochow University, Suzhou, 215123 China
- Laboratory of Aging and Nervous Diseases, School of Medicine, Soochow University, Suzhou, 215123 China
- Department of Physiology, School of Medicine, Showa University, Tokyo, 142 Japan
| | - Qi-Zhang Yin
- Department of Neurobiology, Soochow University, Suzhou, 215123 China
- Laboratory of Aging and Nervous Diseases, School of Medicine, Soochow University, Suzhou, 215123 China
| | - Xiang-Qin Cui
- Department of Biostatistics, University of Alabama at Birmingham, Alabama, 35294-0022 USA
| | - Tadashi Hisamitsu
- Department of Physiology, School of Medicine, Showa University, Tokyo, 142 Japan
| | - Xing-Hong Jiang
- Department of Neurobiology, Soochow University, Suzhou, 215123 China
- Laboratory of Aging and Nervous Diseases, School of Medicine, Soochow University, Suzhou, 215123 China
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Wang BL, Li XX, Zheng F, Liu R, Quan JX, Jia HW, Liang H, Deng T, Guo SY, Guo G, Zhang JY, Qiu MC. [Construction of T-vectors for the direct, unidirectional cloning and analysis of PCR-amplified promoters]. Mol Biol (Mosk) 2007; 41:719-724. [PMID: 17936994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
The amplification and cloning of promoters are regularly employed procedures to study the mechanism of gene regulation. In the present study we developed a method to construct T-vectors used for the direct and unidirectional cloning and analysis of promoters. These so-called T-vectors pEGFP-T and pGL3-T were derived from their parent promoterless vectors pEGFP-1 and pGL3-basic, respectively. To construct the T-vectors, an AhdI recognition site within the Ampr gene in pGL3-basic was silent mutated using overlap extension PCR. Then, a specially designed AhdI cassette was cloned into the respective parent vectors. The procedures of the T-vector construction involved a strategy to minimize the background of nonrecombinant transformants and to eliminate reverse orientation of the PCR products into the T-vectors. The cloning efficiencies of the two T-vectors were both above 85% when tested with a PCR product amplified from a sequence that was pre-confirmed to be able to initiate transcription, and moreover, the constructs harbored the inserts in a desired orientation at a >90% rate. In transient transfection assays, we demonstrated these T-vectors are functional. Thus, the present study provides an easy method to construct a series of T-vectors used for promoter characterization.
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Xu WP, Shan LD, Gong S, Chen L, Zhang YJ, Yin QZ, Hisamitsu T, Jiang XH, Guo SY. Forced running enhances neurogenesis in the hippocampal dentate gyrus of adult rats and improves learning ability. Sheng Li Xue Bao 2006; 58:415-20. [PMID: 17041724] [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: 05/12/2023]
Abstract
To investigate the effect of forced running in motor-driven wheel on neurogenesis in the hippocampal dentate gyrus (DG) of adult rats, 5-bromo-2-deoxyuridine (BrdU), a thymidine analog was applied to mark cell proliferation. Neuroepthelial stem cell protein (nestin) expression was used to identify neural stem/precursor cells. The BrdU- and nestin-positive cells were examined by immunohistochemical technique. The ability of learning was evaluated by Y-maze test to explore the functional role of the newborn cells in the DG after forced running. It was found that the number of BrdU- and nestin-positive cells in the DG in running groups was significantly increased compared to that in the control group (P<0.05). The effect of forced running on neurogenesis was intensity-dependent. In addition, an improvement of learning ability in Y-maze test was observed after forced running. These findings suggest that forced running in motor-driven wheel could enhance neurogenesis in the hippocampal DG of adult rats and improve learning ability.
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Affiliation(s)
- Wei-Ping Xu
- Department of Neurobiology, School of Medicine, Soochow University, Suzhou 215123, China
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Wang BL, Dai CL, Quan JX, Zhu ZF, Zheng F, Zhang HX, Guo SY, Guo G, Zhang JY, Qiu MC. Parathyroid hormone regulates osterix and Runx2 mRNA expression predominantly through protein kinase A signaling in osteoblast-like cells. J Endocrinol Invest 2006; 29:101-8. [PMID: 16610234 DOI: 10.1007/bf03344081] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Runt-related transcription factor 2 (Runx2) and osterix are osteoblast-specific transcription factors essential for the development of osteoblastic cells and bone formation. PTH given intermittently has anabolic effects on bone; however, the exact role remains to be understood completely. The purpose of this study was both to investigate whether PTH regulates Runx2 as well as osterix expression and to identify the signaling used. Using RT-PCR, we confirmed that PTH (1-34) regulated Runx2 and osterix mRNA expression, in rat osteoblast-like cell line UMR 106, in a dose- and time-dependent manner. PTH in low concentrations stimulated both Runx2 and osterix mRNA expression while that in high concentrations did not. Forskolin, an adenylate cyclase activator, also enhanced Runx2 and osterix transcription, and the stimulatory effects of PTH and forskolin were blocked by the pre-treatment of the cells with H-89, a protein kinase A (PKA) inhibitor. In contrast, the protein kinase C (PKC) activator phorbol 12-myristate 13-acetate (PMA) had no effect on Runx2 transcription, but induced an increase in osterix mRNA level at the concentration of 500 nM at 12 h after treatment. Moreover, pre-treatment of the cells with calphostin C, a PKC-specific inhibitor, reduced the increase in osterix transcripts enhanced by PTH and PMA 12 h after treatment. However, these inhibitory effects were not sustained for longer terms. These observations demonstrate that PTH stimulates Runx2 and osterix expression in vitro, at least in part, at transcriptional level. Induction of Runx2 mRNA is mediated through the activation of cAMP/PKA signal transduction. In the case of osterix, although the increase in mRNA level is predominantly mediated via cAMP/PKA signaling, PKC activation might also be involved in this process.
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Affiliation(s)
- B L Wang
- Institute of Endocrinology, Tianjin Medical University, Qi xiang Tai Road #22, 300070 Tianjin, PR China.
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Chen L, Gong S, Shan LD, Xu WP, Zhang YJ, Guo SY, Hisamitsu T, Yin QZ, Jiang XH. Effects of exercise on neurogenesis in the dentate gyrus and ability of learning and memory after hippocampus lesion in adult rats. Neurosci Bull 2006; 22:1-6. [PMID: 17684532] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023] Open
Abstract
Objective To explore the effects of exercise on dentate gyrus (DG) neurogenesis and the ability of learning and memory in hippocampus-lesioned adult rats. Methods Hippocampus lesion was produced by intrahippocampal microinjection of kainic acid (KA). Bromodeoxyuridine (BrdU) was used to label dividing cells. Y maze test was used to evaluate the ability of learning and memory. Exercise was conducted in the form of forced running in a motor-driven running wheel. The speed of wheel revolution was regulated at 3 kinds of intensity: lightly running, moderately running, or heavily running. Results Hippocampus lesion could increase the number of BrdU-labeled DG cells, moderately running after lesion could further enhance the number of BrdU-labeled cells and decrease the error number (EN) in Y maze test, while neither lightly running, nor heavily running had such effects. There was a negative correlation between the number of DG BrdU-labeled cells and the EN in the Y maze test after running. Conclusion Moderate exercise could enhance the DG neurogenesis and ameliorate the ability of learning and memory in hippocampus-lesioned rats.
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Affiliation(s)
- Lin Chen
- Department of Neurobiology, School of Medicine, Soochow University, Suzhou 215123; Department of Physiology, School of Preclinic Medicine, Nanjing University of Traditional Chinese Medicine, Nanjing 210046, China; Department of Physiology, School of Medicine, Showa University, Tokyo 142-8555, Japan; E-mail: ;
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Zhu Q, Guo SY, Gong S, Yin QZ, Hisamitsu T, Jiang XH. Losartan blocks the excitatory effect of peripheral hypertonic stimulation on vasopressinergic neurons in hypothalamic paraventricular nucleus in rats: electrophysiological and immunocytochemical evidence. Neurosci Lett 2005; 380:12-6. [PMID: 15854742 DOI: 10.1016/j.neulet.2005.01.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2004] [Revised: 12/25/2004] [Accepted: 01/05/2005] [Indexed: 11/26/2022]
Abstract
The effect of peripheral hypertonic stimulation on the neurons of hypothalamic paraventricular nucleus (PVN) was investigated in the present study with both electrophysiological and immunocytochemical methods. The discharge frequency of the neurons with phasic activity in PVN could be increased by intraperitoneal (i.p.) injection of hypertonic saline (HS, 1.5M NaCl) (from 2.8 +/- 0.5 Hz to 5.4 +/- 0.9 Hz, P<0.001). The Fos expression in PVN could be enhanced (from 21.2 +/- 12.9 to 217.3 +/- 38.5 Fos-positive neurons, P<0.001) by i.p. HS and the majority of AVP-positive neurons expressing Fos (91.7 +/- 3.6%) was in magnocellular subdivision of PVN. After intracerebroventricular (i.c.v.) injection of losartan, angiotensin II type 1 (AT1) receptor antagonist (5 microg/microl), the excitatory effect of peripheral hypertonic stimulation on PVN neurons with phasic activity was inhibited significantly, and the number of the neurons co-expressing Fos and AVP in PVN decreased significantly (P<0.001) as well. The result demonstrated that the vasopressinergic neurons in PVN could be excited by peripheral hypertonic stimulation, and this excitation might be mediated by angiotensin II fibers projecting from subfornical organ to PVN.
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Affiliation(s)
- Qi Zhu
- Department of Neurobiology, School of Medicine, Soochow University, 48 Renmin Road, Suzhou 215007, PR China
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Ma LS, Pan BR, Li WZ, Guo SY. Improved citation status of World Journal Gastroenterology in 2004: Analysis of all reference citations by WJG and citations of WJG articles by other SCI journals during 1998-2004. World J Gastroenterol 2005; 11:1-6. [PMID: 15609387 PMCID: PMC4205365 DOI: 10.3748/wjg.v11.i1.1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM To determine the citation status in 2004 and the citation trend of WJG by analyzing all articles cited by WJG and all WJG articles cited by SCI journals during 1998-2004. METHODS The total number of published articles and reference citations in WJG, authors' self-citations, WJG's self-citations, citations of WJG articles by SCI journals and inappropriate citations in WJG during 1998-2004 were statistically analyzed. Data on self-citations of the articles published between 1998 and August 2004 (Issues 1-16) were from ISI SCI-E, and data on self-citations of articles published after August 2004 (Issues 17-24) were from the WJG Editorial Office. Data on citations of WJG articles by other journals between 1998 and August 2004 were from ISI SCI-E. RESULTS Annual number of published articles: WJG published 179, 144, 211, 174, 236, 634 and 830 articles, respectively, in 1998, 1999, 2000, 2001, 2002, 2003 and 2004. The number in 2004 increased by 594, compared to that in 2002, giving an increased rate of 251.7%. Annual references cited by WJG were 2 123, 2 125, 6 244, 8 883, 11 442, 23 218 and 25 971, respectively, in 1998-2004. The average number was 31.3 per WJG article in 2004, which was less than that (48.5) in 2002, giving a reduction rate of 35.5%. Authors of WJG cited 125, 126, 343, 210, 354, 310 and 470 of their own published articles, respectively, in 1998-2004. The average number of authors' self-citations was 0.57 per WJG article in 2004, which was decreased by 0.93 or 62.0%, compared with that in 2002. Annual numbers of journal's self-citations: Authors of WJG articles cited 5, 7, 373, 733, 1474, 1947 and 1412 of WJG articles, respectively, in 1998-2004. The average number of journal's self-citations was 1.70 per WJG article in 2004, which decreased by 4.55 or 72.8%. No WJG article was cited in 1998 by other SCI journals. However, the number of citations steadily increased afterwards, with 16, 18, 39, 85, 372 and 580, respectively, in 1999-2004. The average number of citations by other SCI journals was 0.11, 0.09, 0.22, 0.36, 0.59 and 1.06 per WJG article, respectively, 1999-2004 (January-August). There was an increase by 582%, when comparing the citation numbers between 2004 and 2002. Annual WJG self-citation rates and citation rates of WJG articles by other SCI journals: WJG self-citation rates were 30.43%, 95.40%, 95.07%, 94.55%, 83.96% and 67.47%, respectively, in 1999-2004 (January-August). Compared with 2002, the self-citation rate in 2004 decreased by 26.87%. The citation rates of WJG articles by other SCI journals were 69.57%, 4.60%, 4.93%, 5.45%, 16.04%, and 32.53%, respectively, in 1999-2004 (January-August). Compared with 2002, the citation rate in 2004 decreased by 26.87%. There were 8, 19, 218, 274, 461, 698 and 574 inappropriate citations, respectively, in 1998-2004. The average inappropriate citation in 2004 was 0.69 per article, which represents a decrease of 1.26, compared with that in 2002. Inappropriate citations were mostly those with the differences between the two sides of the hyphens of 5-9, and the proportions of inappropriate citations within the three subsections of the differences between the two sides of the hyphens (5-9, 10-19, and >=20) were approximately 7:2:1. In addition, inappropriate citations mostly occurred with frequencies of 1-3 in the articles, and the proportion of inappropriate citations within the two frequency subsections (1-3 and >3) have been approximately 4:1 since 1999. CONCLUSIONS In 2004, the average number of reference citations, authors' self-citations and journal's self-citations were 31.3, 0.57 and 1.70 per article, respectively, which represents a decrease in the numbers by 35.5%. 62.0%, and 72.8% respectively compared to the corresponding numbers in 2002. WJG self-citation rate was 67.47% in 2004 (January-August), which was a decrease by 26.87%, compared with 2002. The citation rate of WJG articles by other SCI journals was 32.53% in 2004 (January-August), an increase of 26.87%, compared to 2002. There were 574 inappropriate citations in 2004, with an average of 0.69 per article, which represents a decrease of 1.26, compared with that in 2002. These figures demonstrate that the overall citation status of WJG is improving.
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Jiang XH, Guo SY, Xu S, Yin QZ, Ohshita Y, Naitoh M, Horibe Y, Hisamitsu T. Sympathetic nervous system mediates cold stress-induced suppression of natural killer cytotoxicity in rats. Neurosci Lett 2004; 358:1-4. [PMID: 15016420 DOI: 10.1016/j.neulet.2003.11.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2003] [Revised: 11/02/2003] [Accepted: 11/04/2003] [Indexed: 10/26/2022]
Abstract
The aim of the present study is to investigate the mechanisms of suppression of splenic natural killer (NK) cytotoxicity caused by cold stress, using 6-hydroxydopamine (6-OHDA) as chemical sympathectomy. The NK activity was measured by (51)chromium release assay. Central sympathectomy with intracerebroventricular injection of 6-OHDA significantly reduced the elevation of the plasma corticosterone level, the expression of Fos in hypothalamic paraventricular nucleus and in locus coeruleus, as well as the suppression of NK activity induced by cold stress at 4 degrees C for 4 h. Peripheral sympathectomy with intraperitoneal (i.p.) injection of 6-OHDA and blockade of beta-adrenergic receptor with i.p. injection of propranolol also reversed the cold stress-induced suppression of NK cytotoxicity, but without significant effect on Fos expression in the brain. The results suggest that the activation of the hypothalamic-pituitary-adrenal axis induced by cold stress might be mediated, at least partially, by the central noradrenergic system, and that the cold stress-induced suppression of NK cytotoxicity might be mediated by the activation of the peripheral sympathetic nerve.
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Affiliation(s)
- Xing-Hong Jiang
- Department of Physiology, School of Medicine, Showa University, Tokyo, Japan
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Jiang XH, Guo SY, Xu S, Yin QZ, Ohshita Y, Naitoh M, Horibe Y, Hisamitsu T. Sympathetic nervous system mediates cold stress-induced suppression of natural killer cytotoxicity in rats. Neurosci Lett 2004; 357:1-4. [PMID: 15036599 DOI: 10.1016/j.neulet.2003.11.075] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2003] [Revised: 11/02/2003] [Accepted: 11/04/2003] [Indexed: 10/26/2022]
Abstract
The aim of the present study is to investigate the mechanisms of suppression of splenic natural killer (NK) cytotoxicity caused by cold stress, using 6-hydroxydopamine (6-OHDA) as chemical sympathectomy. The NK activity was measured by (51)chromium release assay. Central sympathectomy with intracerebroventricular (i.c.v.) injection of 6-OHDA reduced significantly the elevation of plasma corticosterone level, the expression of Fos in hypothalamic paraventricular nucleus and in locus coeruleus, as well as the suppression of NK activity induced by cold stress at 4 degrees C for 4 h. Peripheral sympathectomy with intraperitoneal (i.p.) injection of 6-OHDA and blockade of beta-adrenergic receptor with i.p. injection of propranolol also reversed the cold stress-induced suppression of NK cytotoxicity, but without significant effect on Fos expression in brain. The results suggest that the activation of hypothalamic-pituitary-adrenal axis induced by cold stress might be mediated, at least partially, by central noradrenergic system, and that the cold stress-induced suppression of NK cytotoxicity might be mediated by the activation of peripheral sympathetic nerve.
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Affiliation(s)
- Xing-Hong Jiang
- Laboratory of Neurobiology, School of Medicine, Soochow University, Suzhou 215007, P.R. China
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Zhang HR, Guo SY, Li L, Cai MY, Jin WJ, Liu CS. [Study on the interaction between sparfloxacin and serum albumins by fluorescence]. Guang Pu Xue Yu Guang Pu Fen Xi 2001; 21:829-832. [PMID: 12958907] [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: 05/24/2023]
Abstract
The binding reaction between sparfloxacion (SPFX) and bovine serum albumin (BSA) or chicken egg albumin (CEA) in aqueous was studied using fluorescence and absorption spectra. Their binding constants are KCEA = 8.29 x 10(6) and KBSA = 4.41 x 10(7), and the binding sites are nCEA = 0.558, nBSA = 0.793 respectively. The action distances (RCEA = 1.99 nm, RBSA = 2.09 nm) and energy transfer efficiencies (ECEA = 0.766, EBSA = 0.714) between donor-acceptor and SPFX were obtained by Förster's nonradiative energy transfer mechanism. The experiment demonstrated that the higher the temperature is, the lower the slopes of quenching curves of BSA and CEA are in presence of different amounts of SPFX. It is confirmed that the combination for SPFX with BSA or CEA is a single static quenching process, their interaction may be interpreted with energy transfer mechanism. Through binding reaction of the two albumins with SPFX, the biological effects and action mechanism of SPFX with albumins in vivo were discussed.
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Affiliation(s)
- H R Zhang
- Light Industry and Chemical Engineering Research Institute, South China University of Technology, Guangzhou 510640, China
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Li ZH, Shan LD, Jiang XH, Guo SY, Yu GD, Hisamitsu T, Yin QZ. Analgesic effect of endomorphin-1. Acta Pharmacol Sin 2001; 22:976-80. [PMID: 11749786] [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: 02/23/2023] Open
Abstract
AIM To study the analgesic effect of endomorphin-1 (EM-1). METHODS The experiment was performed in rats and mice to study the analgesic effect of intraperitoneal (ip) injection of EM-1 with tail stimulation-vocalization test, writhing test, adjuvant arthritis, and neuropathic pain model and to compare it with the analgesic effects produced by intracerebroventricular (icv) and intrathecal (it) administrations. RESULTS 1) EM-1 raised the pain threshold dose-dependently in tail stimulation-vocalization test in rats and inhibited the writhing responses induced by ip acetic acid in mice. EM-1 also decreased the hyperalgesia in both adjuvant arthritis and neuropathic pain model. 2) The analgesic effect induced by central (icv and it) administration of EM-1 was faster and more powerful than that induced by peripheral (ip) administration. 3) The analgesic effect of EM-1 was reversed by naloxone (opioid receptor antagonist), as well as by cyprodime (mu-opioid receptor selective antagonist). Repeated administrations of EM-1 induced tolerance. CONCLUSION EM-1 had a definite analgesic effect and the analgesic effect of EM-1 was mediated by central mu-opioid receptor.
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Affiliation(s)
- Z H Li
- Department of Physiology, School of Medicine, Showa University, Tokyo 142, Japan
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Sunagawa M, Okada M, Guo SY, Hisamitsu T. [Effectiveness of Saiko-Keishi-To (TJ-10, a Kampo herbal medicine) for trigeminal neuralgia in rats]. Masui 2001; 50:486-90. [PMID: 11424461] [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: 02/20/2023]
Abstract
It is known that Saiko-Keishi-To (TJ-10), a Kampo herbal medicine used for the treatment of epilepsy, shows a satisfactory curative effect even in the patients suffering from trigeminal neuralgia. To verify the effectiveness of TJ-10, Wistar rats with chronic neuralgia of the mandibular nerve were prepared and TJ-10 was administered to them for 4 weeks following the manifestation of pain in the mandibular region. The result reveals that the rise in the pain threshold in the mandibular region is more significant in the rats administered TJ-10 than in those in the control group. However, in the tail flick test, no significant change was observed in the pain threshold. These findings suggest that TJ-10 is effective for controlling the manifestation of pain in ligatured nerves, by local effect, not by general analgesic effect.
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Affiliation(s)
- M Sunagawa
- Department of Physiology, School of Medicine, Showa University, Tokyo 142-8555
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Yu GD, Liu YL, Jiang XH, Guo SY, Zhang HQ, Yin QZ, Hisamitsu T. The inhibitory effect of serotonin on the spontaneous discharge of suprachiasmatic neurons in hypothalamic slice is mediated by 5-HT(7) receptor. Brain Res Bull 2001; 54:395-8. [PMID: 11306191 DOI: 10.1016/s0361-9230(00)00462-7] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The effects of serotonin (5-HT) receptor agonists and antagonists on the spontaneous discharge of suprachiasmatic nucleus (SCN) neurons were investigated using rat hypothalamic slice. It was found that: (1) the SCN neurons showed a persistent rhythm in the spontaneous discharge rate, which was higher during the light phase than during the dark phase; (2) the effects of 5-HT on SCN neurons was inhibitory in nature and the sensitivity of SCN neurons to 5-HT during the light phase was lower than that during the dark phase; (3) both 5-HT and 5-HT(1/7) receptor agonist, (+/-)-8-hydroxy-2-(DL-N-propylamino) tetralin hydrobromide, could inhibit the spontaneous discharge of SCN neurons. This inhibitory effect could be blocked by 5-HT(2/7) receptor antagonist ritanserin and putative 5-HT(7) receptor antagonists clozapine, but neither by selective 5-HT(2) receptor antagonist ketanserin, nor by 5-HT(1) receptor antagonist pindolol. It was suggested that the inhibitory effect of 5-HT on the spontaneous discharge of SCN neurons in rat hypothalamic slice is mediated by 5-HT(7) receptor subtype.
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Affiliation(s)
- G D Yu
- Laboratory of Neurobiology, School of Medicine, Soochow University, Suzhou, People's Republic of China
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Huo HR, Tan YQ, Zhou AX, Li XQ, Guo SY, Sun YR, Jiang TL. [Effect and mechanism of active fraction A guizhi decoction on dual-directional thermoregulation: effect on heat shock protein in hypothalamus of rats]. Zhongguo Zhong Yao Za Zhi 2000; 25:619-21. [PMID: 12516454] [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: 02/28/2023]
Abstract
OBJECTIVE To investigate the effect of active fraction A in Guizhi Decoction (Fr.A) on dual-directional thermoregulation and its mechanism of influencing heat shock protein (HSP) in hypothalamus. METHOD Using Western blot method to measure HSP of hypothalamus in febrile and hypothermal rats. RESULTS Regulating the body temperature in dual-direction, Fr.A could antagonize the decrease of HSP contents of hypothalamus in hypothermal rats induced by aminopyrine, and abate the HSP content in febrile rats induced by yeast. CONCLUSION Fr.A adjusts the body temperature through regulating the contents of HSP of hypothalamus in febrile and hypothermal rats.
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Affiliation(s)
- H R Huo
- Institute of Chinese Materia Medica, China Academy of Traditional Chinese Medicine, Beijing 100700, China
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48
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Wu QX, Mueller GM, Lutzoni FM, Huang YQ, Guo SY. Phylogenetic and biogeographic relationships of eastern Asian and eastern North American disjunct Suillus species (fungi) as inferred from nuclear ribosomal RNA ITS sequences. Mol Phylogenet Evol 2000; 17:37-47. [PMID: 11020303 DOI: 10.1006/mpev.2000.0812] [Citation(s) in RCA: 78] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Species of Suillus produce fleshy, pored mushrooms. They are important symbiotic (ectomycorrhizal) partners of many coniferous trees. The genus includes several putative eastern Asian and eastern North American disjunct species, i.e., the S. americanus-S. sibiricus and S. decipiens-S. spraguei complexes. Phylogenetic relationships among the groups were determined to further understand the biogeographic pattern. Analyses were based on 40 sequences of the ITS region of the nuclear ribosomal RNA tandem repeats, representing 18 distinct species/populations. Our phylogenetic analyses suggested that: (1) Chinese and United States' (U.S.) S. spraguei plus S. decipiens form a strongly supported monophyletic group, with North American S. decipiens and Chinese S. spraguei being sister taxa; (2) S. americanus, Asian and U.S. S. sibiricus, plus S. umbonatus form a clade supported by a high bootstrap value; and (3) little ITS sequence divergence exists within the latter group compared to the S. decipiens-S. spraguei clade. Phylogenetic patterns revealed by this study imply a close phylogenetic relationship between eastern Asian and eastern North American disjunct population/species of Suillus. These fungi display relatively high host fidelity (at least to the host subgenus level), suggesting potential coevolutionary/comigratory trends.
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Affiliation(s)
- Q X Wu
- Department of Botany, Field Museum of Natural History, 1400 S. Lake Shore Drive, Chicago, Illinois 60605-2496, USA
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49
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Zou L, Guo SY, Davis LC. Using electrophoresis to observe the interaction of nitrogenase with ions. Electrophoresis 2000; 21:2932-9. [PMID: 11001306 DOI: 10.1002/1522-2683(20000801)21:14<2932::aid-elps2932>3.0.co;2-i] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The two protein components of nitrogenase from Klebsiella pneumoniae were shown to interact with metal ions and ADP, altering their electrophoretic mobility in polyacrylamide gel electrophoresis. Both Mg+2 and Mn+2 caused reduced mobility of Fe protein relative to other proteins. The effect was about 50% complete at concentrations around 0.2 mM. Other ions including Fe+2, Ni+2 and Co+2 had no observable effect at levels up to 1 _mM. Both Cd+2 and Zn+2 appeared to interact with the protein; Cd+2 at 0.5 mM dramatically destabilized the protein. The effects of more than a dozen different mutations of the Fe protein on Mg+2 interaction were examined. All mutated proteins appeared to interact with Mg+2 similarly to wild-type. Using relative mobility differences of charge-changed mutants it was estimated that two to three Mg+2 interact with each Fe protein monomer. The MoFe protein also showed interaction with metal ions but the alteration of mobility was much smaller than for the Fe protein because it is larger and less acidic, so that it runs much more slowly than the Fe protein in standard gels. The interaction of ADP with Fe protein was examined in the presence of Mg+2. Increasing ADP partially reversed the mobility decrease observed on Mg+2 binding, and produced a more diffuse protein band indicative of a reaction zone of interconverting conformers. No alteration of MoFe protein mobility was observed with ADP added during electrophoresis.
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Affiliation(s)
- L Zou
- Department of Biochemistry, Kansas State University, Manhatten 66506, USA
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50
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Sunagawa M, Okada M, Guo SY, Hisamitsu T. [Splenic natural killer cell activity is suppressed by ligation of unilateral mental nerve in rats]. Masui 2000; 49:250-4. [PMID: 10752316] [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: 02/16/2023]
Abstract
It has been reported that surgical procedures and postoperative pain suppress immune activities of the patient. But it is not clear if chronic pain in a small area affects immune activities. We prepared rats with chronic neuralgia of the mental branch originating from the mandibular nerve (a division of the trigeminal nerve) and examined the change of splenic NK-cell activity. Surgical procedures to prepare rat models for the study were as follows: one mental nerve was exposed and ligated at the mental foramen in order to create hypersensitivity in the ipsilateral innervated area. Splenic NK-cell activity 3 weeks after the surgery was reduced significantly in the operation group than that of the sham-operation group and the non-operated control group. The result suggests that the immune functions are remarkably affected by chronic pain evoked in a limited area such as the area innervated by the mental nerve.
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Affiliation(s)
- M Sunagawa
- Department of Physiology, School of Medicine, Showa University, Tokyo
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