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Li X, Zhou JX, Qu YD, Kuang X. Correction to: Cyclooxygenase-2 Inhibitor Parecoxib Reduces LPS-Induced Activation of BV2 Microglia Cells. Bull Exp Biol Med 2023; 176:303. [PMID: 38189874 DOI: 10.1007/s10517-024-06012-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2024]
Affiliation(s)
- X Li
- Department of Anesthesiology, the People's Hospital of Longhua Shenzhen, Affiliated Longhua People's Hospital, Southern Medicine University, Shenzhen, China.
| | - J X Zhou
- Shenzhen Second People's Hospital, Shenzhen, China
| | - Y D Qu
- Department of Anesthesiology, the People's Hospital of Longhua Shenzhen, Affiliated Longhua People's Hospital, Southern Medicine University, Shenzhen, China
| | - X Kuang
- Department of Anesthesiology, the People's Hospital of Longhua Shenzhen, Affiliated Longhua People's Hospital, Southern Medicine University, Shenzhen, China
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Shen J, Zhang J, Mo L, Li Y, Li Y, Li C, Kuang X, Tao Z, Qu Z, Wu L, Chen J, Liu S, Zeng L, He Z, Chen Z, Deng Y, Zhang T, Li B, Dai L, Ma Y. Large-scale phage cultivation for commensal human gut bacteria. Cell Host Microbe 2023; 31:665-677.e7. [PMID: 37054680 DOI: 10.1016/j.chom.2023.03.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 01/26/2023] [Accepted: 03/08/2023] [Indexed: 04/15/2023]
Abstract
Phages are highly abundant in the human gut, yet most of them remain uncultured. Here, we present a gut phage isolate collection (GPIC) containing 209 phages for 42 commensal human gut bacterial species. Genome analysis of the phages identified 34 undescribed genera. We discovered 22 phages from the Salasmaviridae family that have small genomes (∼10-20 kbp) and infect Gram-positive bacteria. Two phages from a candidate family, Paboviridae, with high prevalence in the human gut were also identified. Infection assays showed that Bacteroides and Parabacteroides phages are specific to a bacterial species, and strains of the same species also exhibit substantial variations in phage susceptibility. A cocktail of 8 phages with a broad host range for Bacteroides fragilis strains effectively reduced their abundance in complex host-derived communities in vitro. Our study expands the diversity of cultured human gut bacterial phages and provides a valuable resource for human microbiome engineering.
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Affiliation(s)
- Juntao Shen
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Jieqiong Zhang
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Luofei Mo
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yanchen Li
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Yake Li
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Cun Li
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Xiaoxian Kuang
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Zining Tao
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Zepeng Qu
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Lu Wu
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Junyu Chen
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Shiying Liu
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Linfang Zeng
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Zexi He
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Zuohong Chen
- Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
| | - Yu Deng
- Environmental Microbiome Engineering and Biotechnology Laboratory, Department of Civil Engineering, The University of Hong Kong, Hong Kong, China
| | - Tong Zhang
- Environmental Microbiome Engineering and Biotechnology Laboratory, Department of Civil Engineering, The University of Hong Kong, Hong Kong, China
| | - Bing Li
- Guangdong Provincial Engineering Research Center for Urban Water Recycling and Environmental Safety, Tsinghua Shenzhen International Graduate School, Tsinghua University, Shenzhen, China
| | - Lei Dai
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Yingfei Ma
- CAS Key Laboratory of Quantitative Engineering Biology, Shenzhen Institute of Synthetic Biology, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China; University of Chinese Academy of Sciences, Beijing 100049, China.
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Zhang MY, Bao M, Shi DY, Shi HX, Liu XL, Xu N, Duan MH, Zhuang JL, Du X, Qin L, Hui WH, Liang R, Wang MF, Chen Y, Li DY, Yang W, Tang GS, Zhang WH, Kuang X, Su W, Han YQ, Chen LM, Xu JH, Liu ZG, Huang J, Zhao CT, Tong HY, Hu JD, Chen CY, Chen XQ, Xiao ZJ, Jiang Q. [Clinical and genetic characteristics of young patients with myeloproliferative neoplasms]. Zhonghua Xue Ye Xue Za Zhi 2023; 44:193-201. [PMID: 37356980 PMCID: PMC10119718 DOI: 10.3760/cma.j.issn.0253-2727.2023.03.004] [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] [Subscribe] [Scholar Register] [Indexed: 06/27/2023]
Abstract
Objectives: To investigate the clinical and genetic features of young Chinese patients with myeloproliferative neoplasms (MPN). Methods: In this cross-sectional study, anonymous questionnaires were distributed to patients with MPN patients nationwide. The respondents were divided into 3 groups based on their age at diagnosis: young (≤40 years) , middle-aged (41-60 years) , and elderly (>60 years) . We compared the clinical and genetic characteristics of three groups of MPN patients. Results: 1727 assessable questionnaires were collected. There were 453 (26.2%) young respondents with MPNs, including 274 with essential thrombocythemia (ET) , 80 with polycythemia vera (PV) , and 99 with myelofibrosis. Among the young group, 178 (39.3%) were male, and the median age was 31 (18-40) years. In comparison to middle-aged and elderly respondents, young respondents with MPN were more likely to present with a higher proportion of unmarried status (all P<0.001) , a higher education level (all P<0.001) , less comorbidity (ies) , fewer medications (all P<0.001) , and low-risk stratification (all P<0.001) . Younger respondents experienced headache (ET, P<0.001; PV, P=0.007; MF, P=0.001) at diagnosis, had splenomegaly at diagnosis (PV, P<0.001) , and survey (ET, P=0.052; PV, P=0.063) . Younger respondents had fewer thrombotic events at diagnosis (ET, P<0.001; PV, P=0.011) and during the survey (ET, P<0.001; PV, P=0.003) . JAK2 mutations were found in fewer young people (ET, P<0.001; PV, P<0.001; MF, P=0.013) ; however, CALR mutations were found in more young people (ET, P<0.001; MF, P=0.015) . Furthermore, mutations in non-driver genes (ET, P=0.042; PV, P=0.043; MF, P=0.004) and high-molecular risk mutations (ET, P=0.024; PV, P=0.023; MF, P=0.001) were found in fewer young respondents. Conclusion: Compared with middle-aged and elderly patients, young patients with MPN had unique clinical and genetic characteristics.
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Affiliation(s)
- M Y Zhang
- Peking University People's Hospital, Beijing 100044, China
| | - M Bao
- Peking University People's Hospital, Beijing 100044, China
| | - D Y Shi
- Peking University People's Hospital, Beijing 100044, China
| | - H X Shi
- Peking University People's Hospital, Beijing 100044, China
| | - X L Liu
- Nanfang Hospital, Southern Medical University, Guangzhou 510080, China
| | - N Xu
- Nanfang Hospital, Southern Medical University, Guangzhou 510080, China
| | - M H Duan
- Peking Union Medical College Hospital, CAMS & PUMC, Beijing 100730, China
| | - J L Zhuang
- Peking Union Medical College Hospital, CAMS & PUMC, Beijing 100730, China
| | - X Du
- Department of Hematology, Shenzhen Second People's Hospital (First Affiliated Hospital of Shenzhen University), Shenzhen 518035, China
| | - L Qin
- The First Affiliated Hospital and College of Clinical Medicine of Henan University of Science and Technology, Zhenzhou 471003, China
| | - W H Hui
- Xuanwu Hospital, Capital Medical University, Beijing 100053, China
| | - R Liang
- Xi Jing Hospital, The Fourth Military Medical University, Xi'an 710032, China
| | - M F Wang
- Second Hospital of Shanxi Medical University, Taiyuan 030001, China
| | - Y Chen
- Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, China
| | - D Y Li
- Dongzhimen Hospital, Beijing University of Chinese Medicine, Beijing 100700, China
| | - W Yang
- Shengjing Hospital Affiliated to China Medical University, Shenyang 110020, China
| | - G S Tang
- Nanfang Hospital, Southern Medical University, Guangzhou 510080, China
| | - W H Zhang
- First Hospital of Shanxi Medical University, Taiyuan 300012, China
| | - X Kuang
- Kaifeng Central Hospital, Kaifeng 475000, China
| | - W Su
- Dongfang Hospital, Beijing University of Chinese Medicine, Beijing 100078, China
| | - Y Q Han
- The Affiliated Hospital of Inner Mongolia Medical University, Hohhot 010050, China
| | - L M Chen
- The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China
| | - J H Xu
- Department of Hematology, the First Hospital of Qiqihar, Qiqihar 161005, China
| | - Z G Liu
- Shengjing Hospital Affiliated to China Medical University, Shenyang 110020, China
| | - J Huang
- The Fourth Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou 322000, China
| | - C T Zhao
- The Affiliated Hospital of Qingdao University, Qingdao 266003, China
| | - H Y Tong
- The First Affiliated Hospital of College of Medicine, Zhejiang University, Hangzhou 310003, China
| | - J D Hu
- Fujian Medical University Union Hospital, Fuzhou 350001, China
| | - C Y Chen
- Shandong University Qilu Hospital, Jinan 250012, China
| | - X Q Chen
- Northwest University School of Medicine, Xi'an 710069, China
| | - Z J Xiao
- Institute of Hematology and Blood Diseases Hospital, CAMS & PUMC, National Clinical Research Center for Blood Diseases, The State Key Laboratory of Experimental Hematology, Tianjin 300020, China
| | - Q Jiang
- Peking University People's Hospital, Beijing 100044, China
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Li X, Zhou JX, Qu YD, Kuang X. Сyclooxygenase-2 Inhibitor Parecoxib Reduces LPS-Induced Activation of BV2 Microglia Cells. Bull Exp Biol Med 2022; 174:210-215. [PMID: 36600038 DOI: 10.1007/s10517-023-05675-8] [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: 03/11/2022] [Indexed: 01/06/2023]
Abstract
We studied the inhibitory effect of cyclooxygenase-2 inhibitor parecoxib on LPS-induced activation of BV2 microglia cells. The optimal dose of parecoxib (80 μmol/liter) was evaluated by the Cell Counting Kit-8. The cells were divided into the following groups: control (intact cells without treatment); LPS (treatment with 1 μg/ml LPS for 6 h), and experimental (pretreatment with 80 μmol/liter parecoxib for 24 h followed by incubation with 1 μg/ml LPS for 6 h). Cell morphology and proliferation and the expression of NLRP3, caspase-1, pro-caspase-1, and IL-1β were assessed. LPS induced significant morphological changes and decreased proliferation of primary BV2 cells in comparison with the control. These changes were prevented by parecoxib pretreatment. LPS significantly increased NLRP3 inflammatory vesicle activation and expression of NLRP3, caspase-1, pro-caspase-1, and IL-1β in comparison with the control group; pretreatment with parecoxib prevented all these changes. Our results suggest that pretreatment with parecoxib inhibited LPS-induced activation of BV2 microglial cells and probably inhibited NLRP3 inflammasome activation.
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Affiliation(s)
- X Li
- Department of Anesthesiology, the People's Hospital of Longhua Shenzhen, Affiliated Longhua People's Hospital, Southern Medicine University, Shenzhen, China.
| | - J X Zhou
- Shenzhen Second People's Hospital, Shenzhen, China
| | - Y D Qu
- Department of Anesthesiology, the People's Hospital of Longhua Shenzhen, Affiliated Longhua People's Hospital, Southern Medicine University, Shenzhen, China
| | - X Kuang
- Department of Anesthesiology, the People's Hospital of Longhua Shenzhen, Affiliated Longhua People's Hospital, Southern Medicine University, Shenzhen, China
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Kuang X, Su H, Li W, Lin L, Lin W, Luo L. Effects of microbial community structure and its co-occurrence on the dynamic changes of physicochemical properties and free amino acids in the Cantonese soy sauce fermentation process. Food Res Int 2022; 156:111347. [PMID: 35650976 DOI: 10.1016/j.foodres.2022.111347] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 05/01/2022] [Accepted: 05/03/2022] [Indexed: 01/19/2023]
Abstract
The soy sauce produced by Cantonese fermentation has a unique flavor, among which brine fermentation plays an important role. In this fermentation process, 61 volatile compounds, including 19 esters, 10 aldehydes, 9 alcohols, 5 phenols, and 18 others, were identified by headspace solid-phase microextraction-gas chromatography-mass spectrometry. Seventeen kinds of free amino acids were detected by high-performance liquid chromatography. Results showed that Touyou, which comprised 1.5 g/100 g total nitrogen, 1.0 g/100 mL amino acid nitrogen, 3.66 g/100 g reducing sugar, 1.44 g/100 mL total acid, 17.04 g/100 mL salt content, and 27.3% umami free amino acids, had excellent quality. High-throughput sequencing was used to identify microorganisms. The top 3 of bacteria were Weissella, Staphylococcus, and Lactobacillus, and the top 3 fungi were Aspergillus, Zygosaccharomyces, and Candida. The co-occurrence network analysis of microorganisms showed that the top-ranked microorganisms were Plectosphaerella, Aureobasidium, unidentified_Mortierellales_sp, Glutinomyces, Faecalibacterium, and Cladophialophora. Then, eight microorganisms (VIP[pred] > 1) were obtained by two-way orthogonal partial least squares model, namely, Staphylococcus, Candida, Weissella, Aspergillus, Zygosaccharomyces, Lactobacillus, Monilinia, and Clavispora. Correlation analysis showed that these microorganisms were strongly related to flavor metabolites. This study explored the dynamics of traditional Cantonese fermentation, which has positive implications for optimizing this traditional fermentation process.
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Affiliation(s)
- Xiaoxian Kuang
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, PR China; Guangdong Key Laboratory of Fermentation and Enzyme Engineering, South China University of Technology, Guangzhou 510006, PR China
| | - Hantao Su
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, PR China; Guangdong Key Laboratory of Fermentation and Enzyme Engineering, South China University of Technology, Guangzhou 510006, PR China
| | - Weixin Li
- Guangdong Heshan Donggu Flavoring Food Co. Ltd, Heshan 529700, PR China
| | - Lizhao Lin
- Guangdong Heshan Donggu Flavoring Food Co. Ltd, Heshan 529700, PR China
| | - Weifeng Lin
- School of Food Science and Engineering, South China University of Technology, Guangzhou 510640, PR China
| | - Lixin Luo
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, PR China; Guangdong Key Laboratory of Fermentation and Enzyme Engineering, South China University of Technology, Guangzhou 510006, PR China.
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Yan J, Sun D, Kuang X, Liang M, Luo L. Quantitative proteomic analysis reveals the metabolic characteristics and adaptive mechanism of Cupriavidus oxalaticus T2 in the process of simultaneous nitrogen and phenol removal. J Proteomics 2022; 251:104426. [PMID: 34781029 DOI: 10.1016/j.jprot.2021.104426] [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: 06/30/2021] [Revised: 10/07/2021] [Accepted: 11/06/2021] [Indexed: 11/20/2022]
Abstract
Phenol and ammonia in wastewater pose a serious threat to ecosystems and human health. However, the currently limited studies on single bacterium simultaneously removing phenol and nitrogen pollution have not fully elucidated the relevant metabolic mechanisms. The differences in proteomic profile after supplementing with phenol and ammonia for 6 and 24 h, respectively, were evaluated to explore the metabolic characteristics and adaptive mechanism of Cupriavidus oxalaticus T2 during the simultaneous removal process of phenol and nitrogen. Results revealed that a new potential phenol para-degradation pathway appeared in T2. Phenol induced changes in nitrogen metabolism, resulting in increased denitrification and decreased synthesis of glutamate from ammonia at 6 h. In addition, phenol exposure enhanced the expression of cytochrome oxidases with high oxygen affinity and increased ATP synthesis. The increase in chemotaxis and flagellar assembly was conducive to the uptake and utilization of phenol. The synthesis of lipoic acid and biotin was also promoted to resist phenol toxicity. Moreover, phenol triggered cellular stress response, thereby leading to the upregulation of anti-stress proteins, such as universal stress protein, iron‑sulfur cluster protein, and chaperones. This study contributes to revealing the metabolic characteristics and adaptive mechanism of T2 during simultaneous nitrogen and phenol removal. SIGNIFICANCE: Phenol and ammonia often co-exist in wastewater, causing serious environmental problems. The information on the metabolic mechanism of simultaneously removing these two pollutants by bacteria is insufficient at present. Moreover, phenol is toxic to microbial and causes cells damage. Therefore, exploring the response mechanism of bacteria to phenol stress is conducive to understand their tolerance mechanism to aromatic compounds. In this study, the metabolic characteristics and adaptive mechanism of C. oxalaticus T2 during the simultaneous removal of phenol and nitrogen process were evaluated by comparing the proteome profiles at different stages. The results revealed the degradation pathways of phenol and nitrogen by strain T2. A variety of phenol response mechanisms were determined, including enhanced energy production, improved cell motility, increased the synthesis of lipoic acid and biotin, and combined action of multiple anti-stress proteins. This study is potentially useful to future phenol and nitrogen co-pollution bioremediation strategies and provides insight into the phenolic compound resistance mechanism in bacteria.
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Affiliation(s)
- Junwei Yan
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Fermentation and Enzyme Engineering, South China University of Technology, Guangzhou 510006, PR China
| | - Dongdong Sun
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Fermentation and Enzyme Engineering, South China University of Technology, Guangzhou 510006, PR China
| | - Xiaoxian Kuang
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Fermentation and Enzyme Engineering, South China University of Technology, Guangzhou 510006, PR China
| | - Minghua Liang
- School of Food Science and Engineering, South China University of Technology, 381 Wushan Road, Guangzhou, Guangdong 510640, PR China
| | - Lixin Luo
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou 510006, PR China; Guangdong Provincial Key Laboratory of Fermentation and Enzyme Engineering, South China University of Technology, Guangzhou 510006, PR China.
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Luo X, Lin J, Yan J, Kuang X, Su H, Lin W, Luo L. Characterization of DinJ-YafQ toxin-antitoxin module in Tetragenococcus halophilus: activity, interplay, and evolution. Appl Microbiol Biotechnol 2021; 105:3659-3672. [PMID: 33877415 DOI: 10.1007/s00253-021-11297-9] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2021] [Revised: 04/05/2021] [Accepted: 04/12/2021] [Indexed: 11/26/2022]
Abstract
Tetragenococcus halophilus is a moderately halophilic lactic acid bacterium widely used in high-salt food fermentation because of its coping ability under various stress conditions. Bacterial toxin-antitoxin (TA) modules are widely distributed and play important roles in stress response, but those specific for genus Tetragenococcus have never been explored. Here, a bona fide TA module named DinJ1-YafQ1tha was characterized in T. halophilus. The toxin protein YafQ1tha acts as a ribonuclease, and its overexpression severely inhibits Escherichia coli growth. These toxic effects can be eliminated by introducing DinJ1tha, indicating that YafQ1tha activity is blocked by the formed DinJ1-YafQ1tha complex. In vivo and in vitro assays showed that DinJ1tha alone or DinJ1-YafQ1tha complex can repress the transcription of dinJ1-yafQ1tha operon by binding directly to the promoter sequence. In addition, dinJ1-yafQ1tha is involved in plasmid maintenance and stress response, and its transcriptional level is regulated by various stresses. These findings reveal the possible roles of DinJ1-YafQ1tha system in the stress adaptation processes of T. halophilus during fermentation. A single antitoxin DinJ2tha without a cognate toxin protein was also found. Its sequence shows low similarity to that of DinJ1tha, indicating that this antitoxin may have evolved from a different ancestor. Moreover, DinJ2tha can cross-interact with noncognate toxin YafQ1tha and cross-regulate with dinJ1-yafQ1tha operon. In summary, DinJ-YafQtha characterization may be helpful in investigating the key roles of TA systems in T. halophilus and serves as a foundation for further research. KEY POINTS: • dinJ1-yafQ1tha is the first functional TA module characterized in T. halophilus and upregulated significantly upon osmotic and acidic stress. • DinJ2tha can exhibit physical and transcriptional interplay with DinJ1-YafQ1tha. • dinJ2tha may be acquired from bacteria in distant affiliation and inserted into the T. halophilus genome through horizontal gene transfer.
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Affiliation(s)
- Xiaotong Luo
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006, People's Republic of China
- Guangdong Provincial Key Laboratory of Fermentation and Enzyme Engineering, South China University of Technology, Guangzhou, 510006, People's Republic of China
| | - Jieting Lin
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006, People's Republic of China
- Guangdong Provincial Key Laboratory of Fermentation and Enzyme Engineering, South China University of Technology, Guangzhou, 510006, People's Republic of China
| | - Junwei Yan
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006, People's Republic of China
- Guangdong Provincial Key Laboratory of Fermentation and Enzyme Engineering, South China University of Technology, Guangzhou, 510006, People's Republic of China
| | - Xiaoxian Kuang
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006, People's Republic of China
- Guangdong Provincial Key Laboratory of Fermentation and Enzyme Engineering, South China University of Technology, Guangzhou, 510006, People's Republic of China
| | - Hantao Su
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006, People's Republic of China
- Guangdong Provincial Key Laboratory of Fermentation and Enzyme Engineering, South China University of Technology, Guangzhou, 510006, People's Republic of China
| | - Weifeng Lin
- School of Food Science and Engineering, South China University of Technology, Guangzhou, 510006, People's Republic of China
| | - Lixin Luo
- School of Biology and Biological Engineering, South China University of Technology, Guangzhou, 510006, People's Republic of China.
- Guangdong Provincial Key Laboratory of Fermentation and Enzyme Engineering, South China University of Technology, Guangzhou, 510006, People's Republic of China.
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Zhou X, Kuang X, Long C, Liu W, Tang Y, Liu L, Liu H, He J, Huang Z, Fan Y, Zhang Q, Shen H. Curcumin Inhibits Proliferation and Epithelial-Mesenchymal Transition of Retinal Pigment Epithelial Cells Via Multiple Pathways. Curr Mol Med 2018; 17:312-319. [PMID: 29110611 DOI: 10.2174/1566524017666171106115655] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2017] [Revised: 10/14/2017] [Accepted: 10/30/2017] [Indexed: 11/22/2022]
Abstract
BACKGROUND Proliferative vitreoretinopathy (PVR) is a disease caused by dedifferentiation, translocation and proliferation of several types of local cells. These cells form fibrocellular membranes resulting in detachment of retinal and vision loss. PVR occurs in 8%-10% of patients undergoing primary retinal detachment (RD) surgery and becomes a major obstacle for successful RD repair. Retinal pigment epithelial (RPE) cells are among the major cells which consist of fibrocellular membranes. Reproliferation and Epithelial-mesenchymal transition (EMT) are the primary pathological alteration of RPE cells in PVR. METHODS RPE cells were treated with curcumin at different concentrations for 24, 48 and 72 hours. The viable cells were detected by MTT assay. The apoptosis of RPE was stained by Multicaspase/7-AAD and detected using flow cytometry. Cell cycle analysis was quantified by PI staining. The mRNA levels were detected by real-time PCR. The protein levels were detected by western blot. RESULTS We found a compound curcumin significantly inhibited proliferation and EMT of RPE cells in vitro. Further study showed curcumin induced cell cycle arrest by activating G2 checkpoint through p53 pathway. Meanwhile, we found that curcumin suppressed the AKT, MAPK and TGF-β pathways in RPE cells which may also affect proliferation and EMT. Our research identified curcumin a potential novel agent for the PVR prevention and treatment. Curcumin induces cell cycle arrest by activating G2 checkpoint. CONCLUSION Our results in this study also provide the insights to broaden the application of curcumin in research and probably clinics.
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Affiliation(s)
- X Zhou
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, 54 Xianlie Road, Guangzhou 510060, China
| | - X Kuang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, 54 Xianlie Road, Guangzhou 510060, China.,Biobank of Eye, State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, 54 Xianlie Road, Guangzhou 510060, China
| | - C Long
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, 54 Xianlie Road, Guangzhou 510060, China
| | - W Liu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, 54 Xianlie Road, Guangzhou 510060, China
| | - Y Tang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, 54 Xianlie Road, Guangzhou 510060, China
| | - L Liu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, 54 Xianlie Road, Guangzhou 510060, China
| | - H Liu
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, 54 Xianlie Road, Guangzhou 510060, China
| | - J He
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, 54 Xianlie Road, Guangzhou 510060, China
| | - Z Huang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, 54 Xianlie Road, Guangzhou 510060, China
| | - Y Fan
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, 54 Xianlie Road, Guangzhou 510060, China
| | - Q Zhang
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, 54 Xianlie Road, Guangzhou 510060, China
| | - H Shen
- State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, 54 Xianlie Road, Guangzhou 510060, China.,Biobank of Eye, State Key Laboratory of Ophthalmology, Zhongshan Ophthalmic Center, Sun Yat-sen University, 54 Xianlie Road, Guangzhou 510060, China
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9
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Kuang X, Jiang H, Hu X, Shao Z, Lin Y. Abstract P6-01-16: The phosphorylation-specific association of STMN1 with GRP78 promotes breast cancer metastasis. Cancer Res 2017. [DOI: 10.1158/1538-7445.sabcs16-p6-01-16] [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: 11/16/2022]
Abstract
Abstract
This abstract was not presented at the symposium.
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Affiliation(s)
- X Kuang
- The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China; Key Laboratory of Breast Cancer in Shanghai, Fudan University Shanghai Cancer Center, Shanghai, China
| | - H Jiang
- The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China; Key Laboratory of Breast Cancer in Shanghai, Fudan University Shanghai Cancer Center, Shanghai, China
| | - X Hu
- The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China; Key Laboratory of Breast Cancer in Shanghai, Fudan University Shanghai Cancer Center, Shanghai, China
| | - Z Shao
- The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China; Key Laboratory of Breast Cancer in Shanghai, Fudan University Shanghai Cancer Center, Shanghai, China
| | - Y Lin
- The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, China; Key Laboratory of Breast Cancer in Shanghai, Fudan University Shanghai Cancer Center, Shanghai, China
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10
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Carter J, Huang Q, Hsu J, Kuang X, Amdur R, Ahmadzia H. 28: Rates of hiv, malaria and tb affecting pregnancies in the unites states, 1998-2011. Am J Obstet Gynecol 2016. [DOI: 10.1016/j.ajog.2016.09.055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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11
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Xie Y, Xu M, Wang C, Xiao J, Xiao Y, Jiang C, You X, Zhao F, Zeng T, Liu S, Kuang X, Wu Y. Diagnostic value of recombinant Tp0821 protein in serodiagnosis for syphilis. Lett Appl Microbiol 2016; 62:336-43. [PMID: 26853900 DOI: 10.1111/lam.12554] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Revised: 01/31/2016] [Accepted: 02/01/2016] [Indexed: 12/15/2022]
Abstract
UNLABELLED Syphilis is a multistage sexually transmitted disease that remains a serious public health concern worldwide. The coexistence of Treponema pallidum with other closely related members of spirochaeta, such as Leptospira spp. and Borrelia burgdorferi, has complicated the serodiagnosis due to cross-reactive antigens. In this study, recombinant Tp0821 protein was expressed in Escherichia coli and purified by metal affinity chromatography. Then enzyme-linked immunosorbent assays (ELISAs) based on Tp0821 for the detection of specific antibodies were established. The relative positive rates of the IgM ELISA and the IgG ELISA were found to be 91·0 and 98·3%, respectively, when screening 578 syphilis specimens. The specificities were 94·3 and 100%, respectively, when cross-checking with serum samples obtained from 30 patients with Lyme disease, five patients with leptospirosis, and 52 uninfected controls. In addition, relative positive rates and specificities of Tp0821 for human sera were all 100% in Western blotting. When compared to the syphilis diagnostic tests commonly used in clinical settings, we found that the results of Tp0821-based ELISAs correlated well with the results of the treponemal tests, specifically the T. pallidum particle agglutination (TP-PA) test and the chemiluminescent immunoassay (CIA). Thus, these findings identify Tp0821 as a novel serodiagnostic candidate for syphilis. SIGNIFICANCE AND IMPACT OF THE STUDY In this study, we expressed and purified the Treponema pallidum protein Tp0821 and developed Tp0821-based enzyme-linked immunosorbent assays (ELISAs) for the detection of specific antibodies. The serodiagnostic performance of the recombinant protein was then evaluated. When compared to the results of syphilis diagnostic tests commonly used in clinical settings, we found that the reactivities of syphilitic sera with the recombinant antigen correlated well with the results of the treponemal tests, specifically the T. pallidum particle agglutination (TP-PA) test and the chemiluminescent immunoassay (CIA). Thus, the recombinant protein shows promise as a new diagnostic antigen in the ELISAs.
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Affiliation(s)
- Y Xie
- Institution of Pathogenic Biology, Medical College, University of South China, Hengyang, Hunan, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan, China.,Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, Hunan, China
| | - M Xu
- Institution of Pathogenic Biology, Medical College, University of South China, Hengyang, Hunan, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan, China.,Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, Hunan, China
| | - C Wang
- Institution of Pathogenic Biology, Medical College, University of South China, Hengyang, Hunan, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan, China.,Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, Hunan, China
| | - J Xiao
- Clinical Laboratory Department, Hunan Provincial People's Hospital, Changsha, Hunan, China
| | - Y Xiao
- Institution of Pathogenic Biology, Medical College, University of South China, Hengyang, Hunan, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan, China.,Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, Hunan, China.,Clinical Laboratory Department, The Second Affiliated Hospital of University of South China, Hengyang, Hunan, China
| | - C Jiang
- Institution of Pathogenic Biology, Medical College, University of South China, Hengyang, Hunan, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan, China.,Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, Hunan, China
| | - X You
- Institution of Pathogenic Biology, Medical College, University of South China, Hengyang, Hunan, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan, China.,Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, Hunan, China
| | - F Zhao
- Institution of Pathogenic Biology, Medical College, University of South China, Hengyang, Hunan, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan, China.,Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, Hunan, China
| | - T Zeng
- Institution of Pathogenic Biology, Medical College, University of South China, Hengyang, Hunan, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan, China.,Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, Hunan, China
| | - S Liu
- Clinical Laboratory Department, The First Affiliated Hospital of University of South China, Hengyang, Hunan, China
| | - X Kuang
- Institution of Pathogenic Biology, Medical College, University of South China, Hengyang, Hunan, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan, China.,Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, Hunan, China
| | - Y Wu
- Institution of Pathogenic Biology, Medical College, University of South China, Hengyang, Hunan, China.,Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, University of South China, Hengyang, Hunan, China.,Hunan Provincial Key Laboratory for Special Pathogens Prevention and Control, University of South China, Hengyang, Hunan, China
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12
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Hao H, Liu J, Kuang X, Dai M, Cheng G, Wang X, Peng D, Huang L, Ahmad I, Ren N, Liu Z, Wang Y, Yuan Z. Identification of Campylobacter jejuni and determination of point mutations associated with macrolide resistance using a multiplex TaqMan MGB real-time PCR. J Appl Microbiol 2015; 118:1418-25. [PMID: 25766481 DOI: 10.1111/jam.12793] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2014] [Revised: 03/03/2015] [Accepted: 03/06/2015] [Indexed: 11/27/2022]
Abstract
AIMS The aim of the study was to develop a multiplex real-time PCR method to identify Campylobacter jejuni containing mutations commonly associated with macrolide resistance. METHODS AND RESULTS A multiplex fluorescence real-time PCR assay was developed based on TaqMan minor groove binder (MGB) probes. The VS1-MGB probe was designed based on the VS1 gene and was used to identify Camp. jejuni. The 23S rDNA-MGB probe was designed to distinguish macrolide resistance mutations in 23S rDNA, while 57D-MGB and 74D-MGB were designed to detect resistance mutations in ribosomal protein L4. The specificity and accuracy of our method were identical to the conventional biochemical tests, mapA PCR, minimum inhibitory concentration (MIC) determination and DNA sequencing. The linear detection limit of the method was 0·03 ng genomic DNA and three colony formation unit (CFU) per reaction. In 6 of 18 cases, the nature of Erythromycin resistance could be correctly determined from natural isolates; absence of the tested mutations was demonstrated in the remaining four resistant isolates. CONCLUSIONS A multiplex TaqMan MGB real-time PCR assay with high specificity and accuracy was developed to simultaneously identify Camp. jejuni and detect the gene mutations associated with macrolide resistance. SIGNIFICANCE AND IMPACT OF THE STUDY This multiplex method can potentially simplify the identification of Camp. jejuni and determine macrolide resistance due to mutations in 23S rDNA or ribosomal protein L4. This method has a potential for application in different research areas and molecular surveillance.
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Affiliation(s)
- H Hao
- National Reference Laboratory of Veterinary Drug Residues (HZAU) and MAO Key Laboratory for Detection of Veterinary Drug Residues, Huazhong Agricultural University, Wuhan, Hubei, China.,MOA Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University, Wuhan, Hubei, China
| | - J Liu
- National Reference Laboratory of Veterinary Drug Residues (HZAU) and MAO Key Laboratory for Detection of Veterinary Drug Residues, Huazhong Agricultural University, Wuhan, Hubei, China
| | - X Kuang
- National Reference Laboratory of Veterinary Drug Residues (HZAU) and MAO Key Laboratory for Detection of Veterinary Drug Residues, Huazhong Agricultural University, Wuhan, Hubei, China
| | - M Dai
- National Reference Laboratory of Veterinary Drug Residues (HZAU) and MAO Key Laboratory for Detection of Veterinary Drug Residues, Huazhong Agricultural University, Wuhan, Hubei, China
| | - G Cheng
- MOA Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University, Wuhan, Hubei, China
| | - X Wang
- MOA Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University, Wuhan, Hubei, China
| | - D Peng
- MOA Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University, Wuhan, Hubei, China
| | - L Huang
- MOA Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University, Wuhan, Hubei, China
| | - I Ahmad
- MOA Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University, Wuhan, Hubei, China
| | - N Ren
- National Reference Laboratory of Veterinary Drug Residues (HZAU) and MAO Key Laboratory for Detection of Veterinary Drug Residues, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Z Liu
- MOA Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Y Wang
- MOA Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University, Wuhan, Hubei, China
| | - Z Yuan
- National Reference Laboratory of Veterinary Drug Residues (HZAU) and MAO Key Laboratory for Detection of Veterinary Drug Residues, Huazhong Agricultural University, Wuhan, Hubei, China.,MOA Laboratory for Risk Assessment of Quality and Safety of Livestock and Poultry Products, Huazhong Agricultural University, Wuhan, Hubei, China
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13
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Kuang X, Zhang Z, Liu Y, Zheng Y, Hu X, Shao Z. P284 Stathmin-based signature is associated with survival outcomes of breast cancer patients. Breast 2015. [DOI: 10.1016/s0960-9776(15)70316-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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14
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Gui Y, Li H, Zhao M, Yang Q, Kuang X. Effect of intermittent normobaric hyperoxia for treatment of neuropathic pain in Chinese patients with spinal cord injury. Spinal Cord 2014; 53:238-242. [PMID: 25288038 DOI: 10.1038/sc.2014.161] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2014] [Revised: 08/06/2014] [Accepted: 08/27/2014] [Indexed: 12/24/2022]
Abstract
STUDY DESIGN Prospective, randomized and controlled study. OBJECTIVES The aim of the study was to investigate the effect of intermittent normobaric hyperoxia (InHO) for treatment of neuropathic pain in patients with spinal cord injury (SCI). SETTING The First Affiliated Hospital of Nanhua University, Hengyang, Hunan Province, China. METHODS Patients with SCI from Hunan Province were recruited from the First Affiliated Hospital of Nanhua University. History, duration, localization and characteristics of pain were recorded. Visual analog scale (VAS), the Patient Global Impression of Change (PGIC) and Short Form-36 walk-wheel (SF-36ww) was used to investigate the effect of InHO. Patients were randomly assigned to study and control groups. In study group, patients were exposed to pure oxygen via non-rebreathing reservoir mask, which increased the provided oxygen at a rate of 7 l min-1 for 1 or 4 h daily in 2 weeks. While in control group, patients breathed air via non-rebreathing reservoir mask at the same rate. RESULTS A total of 62 SCI patients with neuropathic pain were included in the study. The mean age of the patients was 36.85±10.71 years. Out of 62 patients, 21 were tetraplegic and 41 were paraplegic. Overall, 14 patients had complete SCI while 48 patients had incomplete injuries. Three groups were similar with respect to age, gender, duration, smoker or not, level and severity of injury. In the 4 h per day InHO groups, a statistically significant reduction of the VAS values was observed (P<0.05). Significant difference was also found in SF-36ww pain scores and PGIC (P<0.05). However, such an effect was not evident in the control group. CONCLUSION This study revealed that in treatment of neuropathic pain of SCI patients, InHO may be effective. PERSPECTIVE This article presents InHO may effectively complement pharmacological treatment in patients with SCI and neuropathic pain.
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Affiliation(s)
- Y Gui
- Department of Anesthesiology, The First Affiliated Hospital of Nanhua University, Hengyang, China
| | - H Li
- Department of Anesthesiology, The First Affiliated Hospital of Nanhua University, Hengyang, China
| | - M Zhao
- Department of Anesthesiology, The First Affiliated Hospital of Nanhua University, Hengyang, China
| | - Q Yang
- Department of Anesthesiology, The First Affiliated Hospital of Nanhua University, Hengyang, China
| | - X Kuang
- Department of Anesthesiology, The First Affiliated Hospital of Nanhua University, Hengyang, China
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15
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Rucci M, Victor J, Kuang X. Encoding space in time: a model of human contrast sensitivity in the presence of fixational eye movements. J Vis 2014. [DOI: 10.1167/14.10.393] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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16
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Sansalone J, Kuang X, Ying G, Ranieri V. Filtration and clogging of permeable pavement loaded by urban drainage. Water Res 2012; 46:6763-6774. [PMID: 22123518 DOI: 10.1016/j.watres.2011.10.018] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2011] [Revised: 10/01/2011] [Accepted: 10/14/2011] [Indexed: 05/31/2023]
Abstract
Permeable pavement, as a sustainable infrastructure material can promote hydrologic restoration, particulate matter (PM) and solute control. However, filtration and commensurate clogging are two aspects of continued interest and discussion. This study quantifies filtration and clogging of cementitious permeable pavement (CPP) for loadings from 50 to 200 mg/L of hetero-disperse sandy-silt PM. The CPP mix design provides a hetero-disperse pore size distribution (PSD)(pore), effective porosity (φ(e)) of 24% and median pore size of 658 μm with a standard deviation of 457 μm. The PM mass separation across the entire particle size distribution (PSD)(PM) exceeds 80%; with complete separation for PM greater than 300 μm and 50% separation for suspended PM. Turbidity is reduced (42-95%), and effluent is below 10 NTU in the first quartile of a loading period. Permeable pavement illustrates reductions in initial (clean-bed) hydraulic conductivity (k(0)) with loading time. For all PM loadings, k(0) (3.1 × 10(-1) mm/s) was reduced to 10(-4) mm/s for runoff loading durations from 100 to 250 h, respectively. Temporal hydraulic conductivity (k) follows exponential profiles. Maintenance by vacuuming and sonication illustrate that 96-99% of k(0) is recovered. Permeable pavement constitutive properties integrated with measured PM loads and a year of continuous rainfall-runoff simulation illustrate k reduction with historical loadings. Study results measure and model filtration and hydraulic conductivity phenomena as well as maintenance requirements of permeable pavement directly loaded by urban drainage.
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Affiliation(s)
- J Sansalone
- Univ. of Florida, Engineering School of Sustainable Infrastructure and Environment, Gainesville, FL 32611, USA.
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17
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Kuang X, Victor J, Rucci M. Fixational eye movements predict the discrepancy between behavioral and neurophysiological measurements of contrast sensitivity. J Vis 2012. [DOI: 10.1167/12.9.83] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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18
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Rucci M, Poletti M, Victor J, Kuang X. Contributions of fixational eye movements to the early encoding of visual information. J Vis 2012. [DOI: 10.1167/12.9.1123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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19
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Kuang X, Casile A, Rucci M. Predicting the responses of retinal ganglion cells during fixational eye movements. J Vis 2011. [DOI: 10.1167/11.11.559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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21
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Lungu G, Kuang X, Stoica G, Wong PKY. Monosodium luminol upregulates the expression of Bcl-2 and VEGF in retrovirus-infected mice through downregulation of corresponding miRNAs. Acta Virol 2010; 54:27-32. [PMID: 20201611 DOI: 10.4149/av_2010_01_27] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The retrovirus ts1 is a mutant of Moloney murine leukemia virus (MoMuLV) that causes neurodegeneration (ND) in susceptible mice. Our previous studies showed that the antioxidant drug monosodium luminol (GVT) prevented the development of ND in ts1-infected mice. In this study, we analyzed effect of GVT on the expression of B-cell lymphoma-2 protein (Bcl-2) and vascular endothelial growth factor (VEGF) in central nervous system (CNS) tissues of these animals. Our data showed that GVT treatment of ts1-infected mice significantly increased their expression of Bcl-2 and VEGF in brainstem compared with ts1-infected untreated mice. We also studied the expression of specific microRNAs (miRNAs) such as miRNA-15 and -16 (targeting Bcl-2), and miRNA-20 (targeting VEGF). We found that the expression of miRNAs inversely correlated with the upregulation of their target proteins in ts1-infected untreated as well as in GVT-treated-ts1-infected mice. The data showed that GVT treatment prevented ts1-induced ND at least in part by upregulating Bcl-2 and VEGF expression, what likely occurred as a consequence of downregulation of their corresponding miRNAs.
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Affiliation(s)
- G Lungu
- Department of Veterinary Pathobiology, Texas A&M University, College Station, TX 77843, USA.
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Cui Y, Devillier P, Kuang X, Wang H, Zhu L, Xu Z, Xia Z, Zemoura L, Advenier C, Chen H. Tiotropium reduction of lung inflammation in a model of chronic gastro-oesophageal reflux. Eur Respir J 2009; 35:1370-6. [DOI: 10.1183/09031936.00139909] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Li S, Luo X, Lu L, Liu B, Kuang X, Shao G, Yu S. Effect of Intravenously Injected Manganese on the Gene Expression of Manganese-Containing Superoxide Dismutase in Broilers. Poult Sci 2008; 87:2259-65. [DOI: 10.3382/ps.2007-00525] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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24
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Li S, Deng X, Jiang F, Zhao Y, Xiao W, Kuang X, Sun X. Design and Synthesis of Novel Diaryl Heterocyclic Derivatives as Selective Cyclooxygenase-2. LETT DRUG DES DISCOV 2008. [DOI: 10.2174/157018008783928517] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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25
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Luo XG, Li SF, Lu L, Liu B, Kuang X, Shao GZ, Yu SX. Gene Expression of Manganese-Containing Superoxide Dismutase as a Biomarker of Manganese Bioavailability for Manganese Sources in Broilers. Poult Sci 2007; 86:888-94. [PMID: 17435022 DOI: 10.1093/ps/86.5.888] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [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: 01/23/2023] Open
Abstract
The goal of this study was to determine whether Mn-containing superoxide dismutase (MnSOD) gene expression in heart tissue would reflect differences among bioavailabilities of Mn sources earlier than other indices. Broilers were divided into 5 groups and fed a Mn-unsupplemented basal diet (control) or the basal diet supplemented with 120 mg of Mn/kg as Mn sulfate or Mn methionine E (Mn Met E), Mn amino acid B (Mn AA B), or Mn amino acid C (Mn AA C) with weak, moderate, or strong chelation strength, respectively. Heart MnSOD mRNA levels were analyzed using quantitative reverse transcription-PCR at 7, 14, or 21 d. The results showed that heart MnSOD mRNA level increased as dietary Mn level increased at any age. At 7 d, chicks fed the diet supplemented with Mn AA B had higher MnSOD mRNA levels than those fed the diet supplemented with Mn sulfate and Mn Met E, and the same tendency was observed at 14 or 21 d. The results suggest that MnSOD gene expression, which is regulated by dietary Mn at transcriptional level, could reflect differences among bio-availabilities of organic Mn sources as early as 7 d. Therefore, the estimation of relative bioavailabilities of Mn sources based on heart MnSOD mRNA level could require a shorter experimental period and a smaller number of animals, and thus less cost.
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Affiliation(s)
- X G Luo
- Mineral Nutrition Research Division, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100094, PR China.
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Kuang X, Yao Y, Du JR, Liu YX, Wang CY, Qian ZM. Neuroprotective role of Z-ligustilide against forebrain ischemic injury in ICR mice. Brain Res 2006; 1102:145-53. [PMID: 16806112 DOI: 10.1016/j.brainres.2006.04.110] [Citation(s) in RCA: 122] [Impact Index Per Article: 6.8] [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: 03/04/2006] [Revised: 04/24/2006] [Accepted: 04/27/2006] [Indexed: 11/17/2022]
Abstract
Radix Angelica sinensis, known as Danggui in Chinese, has been used to treat cardiovascular and cerebrovascular diseases in Traditional Chinese Medicine for a long time. Modern phytochemical studies showed that Z-ligustilide (LIG) is the main lipophilic component of Danggui. In this study, we examined whether LIG could protect ischemia/reperfusion-induced brain injury by minimizing oxidative stress and anti-apoptosis. Transient forebrain cerebral ischemia (FCI) was induced by the bilateral common carotid arteries occlusion for 30 min. LIG was intraperitoneally injected to ICR mice at the beginning of reperfusion. As determined via 2,3,5-triphenyl tetrazolium chloride (TTC) staining at 24 h following ischemia, the infarction volume in the FCI mice treated without LIG (22.1 +/- 2.6%) was significantly higher than that in the FCI mice treated with 5 mg/kg (11.8 +/- 5.2%) and 20 mg/kg (2.60 +/- 1.5%) LIG (P < 0.05 or P < 0.01). LIG treatment significantly decreased the level of malondialdehyde (MDA) and increased the activities of the antioxidant enzyme glutathione peroxidase (GSH-PX) and superoxide dismutase (SOD) in the ischemic brain tissues (P < 0.05 or P < 0.01 vs. FCI group). In addition, LIG provided a great increase in Bcl-2 expression as well as a significant decrease in Bax and caspase-3 immunoreactivities in the ischemic cortex. The findings demonstrated that LIG could significantly protect the brain from damage induced by transient forebrain cerebral ischemia. The antioxidant and anti-apoptotic properties of LIG may contribute to the neuroprotective potential of LIG in cerebral ischemic damage.
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Affiliation(s)
- X Kuang
- Department of Pharmacology, Sichuan University College of Pharmacy, Chengdu, P R China
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Kuang X, Allix MMB, Claridge JB, Niu HJ, Rosseinsky MJ, Ibberson RM, Iddles DM. Crystal structure, microwave dielectric properties and AC conductivity of B-cation deficient hexagonal perovskites La5MxTi4–xO15 (x = 0.5, 1; M = Zn, Mg, Ga, Al). ACTA ACUST UNITED AC 2006. [DOI: 10.1039/b513696b] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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28
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Li S, Luo X, Lu L, Crenshaw T, Bu Y, Liu B, Kuang X, Shao G, Yu S. Bioavailability of organic manganese sources in broilers fed high dietary calcium. Anim Feed Sci Technol 2005. [DOI: 10.1016/j.anifeedsci.2005.04.052] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Li S, Luo X, Liu B, Crenshaw TD, Kuang X, Shao G, Yu S. Use of chemical characteristics to predict the relative bioavailability of supplemental organic manganese sources for broilers1. J Anim Sci 2004; 82:2352-63. [PMID: 15318735 DOI: 10.2527/2004.8282352x] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Twelve organic Mn sources and MnSO4 were evaluated by polarographic analysis and via solubility in buffers (pH 5 and 2) and deionized water. Fractions from solubility tests were evaluated by gel filtration chromatography for structural integrity. Organic Mn sources included five Mn methionine complexes (Mn Met A to Mn Met E), two Mn proteinates (Mn Pro A and Mn Pro B), and five Mn amino acids (Mn AA A to Mn AA E). Sources varied considerably in chemical characteristics. Chelation strength (Qf) ranged from weak (1.9 Qf-values) to strong complexes (115.4 Qf-values). No complexed Mn was found in filtrates at pH 2.0 or 5.0. A 42-d bioassay was used to estimate relative bioavailability of Mn sources for chicks fed diets supplemented with 60, 120, or 180 mg Mn/kg. Bone Mn, heart Mn, heart manganese-superoxide dismutase activity (MnSOD), and heart MnSOD mRNA increased (P < 0.001) as dietary Mn increased. Only heart MnSOD mRNA tended (P < 0.10) to differ among dietary Mn sources. For bioassays of Mn, the MnSOD mRNA level in heart was more sensitive than the MnSOD activity in heart or other indices. Relative to MnSO4 (assigned 100%), slope ratios of MnSOD mRNA levels in heart gave bioavailabilities of 99, 132, and 113% for Mn Met E, Mn AA B, and Mn AA C sources with weak, moderate, and strong chelation strength, respectively. The bioavailability of Mn was more closely related to chelation strength as measured by polarography than to chemical traits assessed by solubility or structural integrity.
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Affiliation(s)
- S Li
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, China
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Li H, Zhang X, Kuang X, Wang J, Wang D, Li L, Yan S. A Scanning Electron Microscopy Study on the Morphologies of Isotactic Polypropylene Induced by Its Own Fibers. Macromolecules 2004. [DOI: 10.1021/ma035932c] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- H. Li
- State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, P. R. China
| | - X. Zhang
- State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, P. R. China
| | - X. Kuang
- State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, P. R. China
| | - J. Wang
- State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, P. R. China
| | - D. Wang
- State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, P. R. China
| | - L. Li
- State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, P. R. China
| | - S. Yan
- State Key Laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, Beijing 100080, P. R. China
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31
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Zhang B, Jin S, Kuang X, Yao W, Xia G, Jiang M. [Effects of Rg1 on calcium channel of guinea pig ventricular myocytes]. Zhongguo Zhong Yao Za Zhi 1999; 24:624-6, 640. [PMID: 12205963] [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: 02/26/2023]
Abstract
OBJECTIVE To evaluate the effect of Rg1 (purified saponin of Panax notoginseng) on L-Ca2+ channel of guinea pig ventricular myocytes. METHOD The whole-cell patch clamp recording technique. RESULT When the holding potential was kept at -40 mV, and the cell was depolarized to +40 mV for 150 ms at a frequency of 0.5 Hz.Rg1 10 mumol.L-1 and 30 mumol.L-1 could not reduce Bay K 8644 and nifedipine-sensitive L-type Ca2+ inward current (P > 0.05, n = 5). CONCLUSION Rg1 should not be a Ca2+ channel antagonist.
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Affiliation(s)
- B Zhang
- ICU, Hospital of Chinese Traditional Medicine of Guangdong Province, Fu Shan 528000
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32
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Kuang X, Liu D, Bao D. [Effect of enoxacin on pharmacokinetics of theophylline in rats]. Hua Xi Yi Ke Da Xue Xue Bao 1999; 30:334-6. [PMID: 12212302] [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: 02/26/2023]
Abstract
In order to obtain an experimental evidence for Enoxacin(ENX) to be correctly used in clinical treatment, we studied the effect of ENX on the pharmacokinetic parameters of theophylline(TP). A single oral dose of TP 20 mg/kg was given to rats and ENX(300 mg/kg, 450 mg/kg) was co-administered orally three times to those rats. The plasma concentrations of TP were determined by HPLC after TP was administered 1, 2, 3, 5, 7, 12 and 24 hrs. The results showed that TP was eliminated by one compartment model. TP plasma concentrations and AUC were significantly increased. T1/2 beta of TP was prolonged. The total clearance of TP was decreased when compared with the control. This interaction was dose-dependent. It was concluded that the interaction between ENX and TP existed. Concomitant use of ENX with TP should be avoided.
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Affiliation(s)
- X Kuang
- Department of Pharmacology, School of Basic Medical Sciences, WCUMS, Chengdu 610041
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33
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Kuang X, Liao Y, Chao Y, Wang H. [Determination of normal temperature properties of refractory die material compatible with slip casting core of sintered titanium powder]. Hua Xi Kou Qiang Yi Xue Za Zhi 1999; 17:159-62. [PMID: 12539715] [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 The refractory die is the precondition for developing slip casting core of sintered powder. This study is to determine the normal temperature properties of the refractory die material compatible with slip casting core. METHODS to mix the die material at five different ratios (8/1, 7.5/1, 7/1, 6.5/1, and 6/1) and measure their solidification time with self-manufactured Vicker's needle; to prepare five cylindrical specimens (phi 10 x 15 mm) in different drying time for determining their compressive strength, and then to let another five specimens fire at 1000 degrees C four times for measuring the residual compressive strength at room temperature. RESULTS The setting time was 16.25 minutes (7.5/1), and the lower the powder-liquid ratio, the longer the setting time. The normal compressive strength was 25.32 MPa (drying 24 hours), while the longer the drying time, the higher the compressive strength achieved (P < 0.01). The residual compressive strength was 24 MPa. CONCLUSION The normal temperature properties of the refractory die material meet the demand of slip casting core of sintered powder.
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Affiliation(s)
- X Kuang
- College of Stomatology, West China University of Medical Sciences
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34
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Zhou Z, Hu Y, Kuang X, Wu H, Xue S. [Effects of occupational exposure to formamidines on cardiovascular functions]. Zhonghua Yu Fang Yi Xue Za Zhi 1999; 33:140-2. [PMID: 11864469] [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: 02/23/2023]
Abstract
OBJECTIVE To understand the possible effects of occupational exposure to formamidines on human cardiovascular function, this study was carried out. METHODS Sixteen farmers spraying chlordimeform, 14 packers packaging chlordimeform and 23 packers packaging mono-formamidine were followed-up pre- and post-exposure. Their urinary excretion of formamidine or its metabolite, as well as air concentrations of formamidine at their work places and their skin contamination with it were measured to estimate the exposure level. Furthermore, 24-hour urinary level of vanillinmandelic acid (VMA) was analyzed among mono-formamidine packers. RESULTS Their whole body skin contaminated with 3.240 and 2.142 g/cm(2) of chlordimeform in the sprayers and packers, respectively. Their hand skin contaminated with mono-formamidine at 6.59 g/cm(2) in the packers. It indicated that the major route of exposure to formamidine was skin contamination. Urinary levels of formamidines or their metabolites increased significantly after exposure, reaching 6.194 and 3.378 micromol/L for the sprayers and packers exposed to chlordimeform, respectively, and 2.760 - 3.427 micromol/L for mono-formamidine in the packers. Their heart rates slowed down, P-R and Q-T intervals prolonged and blood pressure reduced after exposure, as compared with those before exposure. Consistency of the results in several studies demonstrated that formamidines could induce changes in the indices for cardiovascular functions under the relatively low exposure levels at present. Decrease of urinary VMA from 0.068 micromol/L pre-exposure to 0.040 - 0.055 micromol/L post-exposure suggested that catecholamine could play a role in these effects. CONCLUSION Formamidines has certain effects on human cardiovascular function. It is suggested that attention be paid to the changes in cardiovascular functions of those exposed in their health surveillance.
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Affiliation(s)
- Z Zhou
- Department of Occupational Health, Shanghai Medical University, Shanghai 200032
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35
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Kuang X, Liao Y, Chao Y, Meng Y. [Determination of high temperature compressive strength and refractory degree of die material compatible with slip casting core of sintered titanium powder]. Hua Xi Kou Qiang Yi Xue Za Zhi 1999; 17:163-5. [PMID: 12539716] [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 The refractory die is the precondition for developing slip casting core of sintered powder. This study is to determine the high temperature properties of the refractory die material compatible with slip casting core. METHODS To prepare three cylindrical specimens (phi 10 x 15 mm) and determine their compressive strength at 1000 degrees C: to make four specimens in flat-topped cone for determining the practical refractory degree by decreasing the pressing temperatures in a sequence of 1420, 1400, 1350 and 1100 degrees C. RESULTS The compressive strength of this material was 17.8 MPa at 1000 degrees C. Its practical refractory degree was higher than 1100 degrees C. CONCLUSION The high temperature properties of the refractory die material that we developed meet the demand of slip casting core of sintered powder.
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Affiliation(s)
- X Kuang
- College of Stomatology, West China University of Medical Sciences
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36
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Chao Y, Kuang X, Liao Y, Wang H. [Determination of major expansion properties of refractory die material compatible with slip casting core of sintered titanium powder]. Hua Xi Kou Qiang Yi Xue Za Zhi 1999; 17:72-4. [PMID: 12539330] [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 determinate major expansion properties of refractory die material. METHODS The setting expansion ratio of refractory die material for slip casting core of sintered titanium powder at room temperature was performed, as well as thermal expansion ratio from room temperature to 800 degrees C. RESULTS The maximum setting expansion ratio in 2 hours reached 0.3407%; The final setting expansion ratio in 24 hours was 0.3117%; The mean thermal expansion coefficient was mainly in range of 8 x 10(-6)-11 x 10(-6)/degree C; The expansion property seemed very stable after sintering repeatedly and the small shrinkage after sintering could be compensated with the die spacer and setting expansion. CONCLUSION The expansion properties of the refractory die material that we synthesized can fulfil the application requirements of slip casting core of sintered titanium powder.
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Affiliation(s)
- Y Chao
- College of Stomatology, West China University of Medical Sciences
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37
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Meng X, Yamakawa K, Zou K, Wang X, Kuang X, Lu C, Wang C, Karasawa T, Nakamura S. Isolation and characterisation of neurotoxigenic Clostridium butyricum from soil in China. J Med Microbiol 1999; 48:133-137. [PMID: 9989640 DOI: 10.1099/00222615-48-2-133] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Soil specimens collected from a site around the home of patients with food-borne type E. botulism probably caused by neurotoxigenic Clostridium butyricum in Guanyun, Jiangsu province, China, were examined for the presence of neurotoxigenic C. butyricum. Five lakeside sites of Weishan lake, in an area near to the sites where the type E. botulism outbreaks caused by neurotoxigenic C. butyricum occurred were also surveyed. Type E toxin-producing C. butyricum was isolated from soil from four sites including the site in Guanyun. Polymerase chain reaction assay demonstrated the presence of the type E toxin gene in all the toxigenic isolates. The biochemical properties of the isolates from the Guanyun soil and the lakeside soil were identical except for inulin fermentation and starch hydrolysis properties. These results indicate that neurotoxigenic C. butyricum has its principal habitat in soil.
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Affiliation(s)
| | - K Yamakawa
- Department of Bacteriology, School of Medicine, Kanazawa University, Kanazawa 920-8640, Japan
| | | | | | | | | | | | - T Karasawa
- Department of Bacteriology, School of Medicine, Kanazawa University, Kanazawa 920-8640, Japan
| | - S Nakamura
- Department of Bacteriology, School of Medicine, Kanazawa University, Kanazawa 920-8640, Japan
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38
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Xu P, Carotenuto G, Nicolais L, Zheng Z, Kuang X. Preparation and characterization of new electrocardiogram electrodes. J Mater Sci Mater Med 1999; 10:65-68. [PMID: 15347926 DOI: 10.1023/a:1008965718192] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
A new generation of electrocardiogram (ECG) electrodes have been fabricated and superficially modified by a special controlled precorrosion process. The electrodes have been characterized by scanning electron microscopy (SEM), resistance-capacitance measurements (RCM) and simulated defibrillation recovery (SDR). The resulting surface of the Sn alloys was rough, and, consequently, a large active surface area was available. As a result, a higher electrocardiogram electrode performance, including low alternating current (a.c.) impedance, excellent time stability and improved SDR, was achieved. Such new design can surely find important future applications in clinical diagnosis.
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Affiliation(s)
- P Xu
- Department of Chemistry, Zhejiang University, Hangzhou, People's Republic of China
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39
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Liang X, Wang H, Chao Y, Kuang X. [The influence of porcelain thickness and non-uniformity on porcelain cracks in implant-supported metal-porcelain fixed bridge]. Hua Xi Yi Ke Da Xue Xue Bao 1997; 28:357-60. [PMID: 10683945] [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: 02/15/2023]
Abstract
This experiment studied the influence of porcelain thickness and non-uniformity on porcelain crack in implant-supported metal-porcelain fixed bridge. The result indicated that porcelain crack began to appear when the body porcelain powder was 3-5 mm in thickness; more cracks took place when the powder thickness increased by 1 mm to 2 mm on the axial surface in the axial direction; cracks became serious when the thickness suddenly changed to zero; and connectors were liable to cracks. Therefore, in designing and fabrication, one should avoid and sudden change in the shapes of the connector and the porcelain on it, any sudden change in the thickness of porcelain and a thickness of porcelain powder not less than 3.5 mm. Other-wise, it is neccessary to use internal crown between metal base and abutment to meet the demands.
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Affiliation(s)
- X Liang
- Department of Prosthodontics, School of Stomatology, Chengdu
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40
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Meng X, Karasawa T, Zou K, Kuang X, Wang X, Lu C, Wang C, Yamakawa K, Nakamura S. Characterization of a neurotoxigenic Clostridium butyricum strain isolated from the food implicated in an outbreak of food-borne type E botulism. J Clin Microbiol 1997; 35:2160-2. [PMID: 9230405 PMCID: PMC229926 DOI: 10.1128/jcm.35.8.2160-2162.1997] [Citation(s) in RCA: 63] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Neurotoxigenic Clostridium butyricum was isolated from the food implicated in an outbreak of clinically diagnosed type E botulism in China. PCR assay showed that the isolate (LCL 155) contained the type E botulinum toxin gene. This appears to be the first report of neurotoxigenic C. butyricum causing food-borne botulism.
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Affiliation(s)
- X Meng
- Department of Anaerobic Bacteriology, Lanzhou Institute of Biological Products, Ministry of Public Health of China
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41
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Chen K, Fang J, Kuang X, Mo Q. [Effects of the fruit of Rubus chingii Hu on hypothalamus-pituitary-sex gland axis in rats]. Zhongguo Zhong Yao Za Zhi 1996; 21:560-2 inside back cover. [PMID: 9772650] [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: 02/09/2023]
Abstract
The aqueous extract of the fruit of Rubus chingii (RCH) can decrease the contents of LH, FSH and E2, and increase the content of LHRH secreted by thymus gland as well as the level of testosterone in blood.
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Affiliation(s)
- K Chen
- Shanghai University of Traditional Chinese Medicine
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42
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Kuang X, Su Y, Guo H. [Study on combined acupunctural and general anesthesia in pneumonectomy]. Zhongguo Zhong Xi Yi Jie He Za Zhi 1996; 16:84-6. [PMID: 8762420] [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: 02/02/2023]
Abstract
Combined acupunctural and general anesthesia in pneumonectomy were studied. The result showed that general anesthesia complemented with electro-acupuncture at He Gu (LI 4) and San Yang Luo(SJ 8) reduced amount of Fentanyl 38-85 micrograms/h compared with general anesthesia alone. There were no statistical difference in blood pressure and heart rate during the operation in every group, all of the SPO2 were in normal range. It was considered that acupuncture in combination with general anesthesia could reduce dosage of anesthetics and the inhibition of physiological function. It is a practical and acceptable anesthetic method by the surgeon and patient.
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Affiliation(s)
- X Kuang
- Beijing Tuberoulosis and Thoracic Tumor Institute
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