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Abstract
BACKGROUND AND OBJECTIVES Myocardial ischemia-reperfusion injury (MIRI) threatens global health and lowers people's sense of happiness. Till now, the mechanism of MIRI has not been well-understood. Therefore, this study was designed to explore the role of UBIAD1 in MIRI as well as its detailed reaction mechanism. METHODS The mRNA and protein expressions of UBIAD1 before or after transfection were measured using RT-qPCR and western blot. Western blot was also adopted to measure the expressions of signaling pathway-, mitochondrial damage- and apoptosis-related proteins. Moreover, mitochondrial membrane potential and ATP level were verified by JC-1 immunofluorescence and ATP kits, respectively. With the application of CCK-8, LDH and CK-MB assays, the cell viability, LDH and CK-MB levels were evaluated, respectively. In addition, the cell apoptosis was detected using TUNEL. Finally, the expressions of ROS, SOD, MDA and CAT were measured using DCFH-DA, SOD, MDA and CAT assays, respectively. RESULTS In the present study, we found that UBIAD1 was downregulated in hypoxia-reoxygenation (H/R) -induced H9C2 cells and its upregulation could activate SIRT1/PGC1α signaling pathway. It was also found that UBIAD1 regulated mitochondrial membrane potential and ATP level via activating SIRT1/PGC1α signaling pathway. In addition, the injury of H/R-induced H9C2 cells could be relieved by UBIAD1 through the activation of SIRT1/PGC1α signaling pathway. Moreover, UBIAD1 exhibited inhibitory effects on apoptosis and oxidative stress of H/R-induced H9C2 cells through activating SIRT1/PGC1α signaling pathway. CONCLUSION To sum up, UBIAD1 could alleviate apoptosis, oxidative stress and H9C2 cell injury by activating SIRT1/PGC1α, which laid experimental foundation for the clinical treatment of MIRI.
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Affiliation(s)
- Da-Bin Pan
- Department of Cardiology, Yijishan Hospital Wannan Medical College, Anhui Province, China
| | - Meng-Xiang Ren
- Graduate School of Wannan Medical College, Anhui Province, China
| | - Wen-Long Ding
- Department of Cardiology, Xuancheng People's Hospital, Anhui Province, China
| | - Da-Yong Zha
- Department of Cardiology, Wuhu Second People's Hospital, Wuhu City, Anhui Province, China
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Hou YN, Ding WL, Jiang XX, Hu JL, Tan ZZ, Zhao KH. New Far-Red and Near-Infrared Fluorescent Phycobiliproteins with Excellent Brightness and Photostability. Chembiochem 2022; 23:e202200267. [PMID: 35811374 DOI: 10.1002/cbic.202200267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Revised: 07/10/2022] [Indexed: 11/11/2022]
Abstract
Far-red and near-infrared fluorescent proteins can be used as fluorescence biomarkers in the region of maximal transmission of most tissues and facilitate multiplexing. Recently, we reported the generation and properties of far-red and near-infrared fluorescent phycobiliproteins, termed BeiDou Fluorescent Proteins (BDFPs), which can covalently bind the more readily accessible biliverdin. Far-red BDFPs maximally fluoresce at ∼670 nm, while near-infrared BDFPs fluoresce at ∼710 nm. In this work, we molecularly evolved BDFPs as follows: (a) mutations L58Q, S68R and M81K of BDFPs, which can maximally enhance the effective brightness in vivo by 350 %; (b) minimization and monomerization of far-red BDFPs 2.1, 2.2, 2.3, and near-infrared BDFPs 2.4, 2.5 and 2.6. These newly developed BDFPs are remarkably brighter than the formerly reported far-red and near-infrared fluorescent proteins. Their advantages are demonstrated by biolabeling in mammalian cells using super-resolution microscopy.
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Affiliation(s)
- Ya-Nan Hou
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, P. R. China
| | - Wen-Long Ding
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, P. R. China
| | - Xiang-Xiang Jiang
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, P. R. China
| | - Ji-Ling Hu
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, P. R. China
| | - Zi-Zhu Tan
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, P. R. China
| | - Kai-Hong Zhao
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, P. R. China
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Song C, Yu YF, Ding WL, Yu JY, Song L, Feng YN, Zhang ZJ. Quantification of the Masseter Muscle Hardness of Stroke Patients Using the MyotonPRO Apparatus: Intra- and Inter-Rater Reliability and Its Correlation with Masticatory Performance. Med Sci Monit 2021; 27:e928109. [PMID: 33515446 PMCID: PMC7856838 DOI: 10.12659/msm.928109] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
BACKGROUND Chewing dysfunction is one of the most common serious complications after a stroke. It may be influenced by the hardness of the masseter muscle and masticatory performance; however, the association between these 2 factors is not explicit. Thus, it is meaningful to explore the functional status of the masseter muscle among stroke patients. The main objectives of this study were to examine the intra- and inter-rater reliability of the MyotonPRO apparatus in measuring masseter muscle hardness in stroke patients and to investigate the correlation between the bilateral masseter muscle hardness and masticatory performance in these patients. MATERIAL AND METHODS A total of 20 stroke patients participated in our study. The hardness of the masseter muscle was measured by 2 physiotherapists using the MyotonPRO apparatus. Overall, each patient masticated 2 pieces of red-blue bicolor chewing gum for 20 chewing cycles each. The chewing pieces were analyzed using ViewGum software for masticatory performance. RESULTS The intra- and inter-rater reliability of the MyotonPRO apparatus for measuring bilateral masseter hardness of stroke patients was excellent. The correlation analysis showed that the hardness index of the masseter muscle on the affected side was moderately correlated with the masticatory performance of the same side. CONCLUSIONS The MyotonPRO device can be used for measuring the masseter muscle hardness of stroke patients, with excellent reliability. This study established the construct validity between the stiffness of the masseter muscle and masticatory performance.
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Affiliation(s)
- Chao Song
- Department of Rehabilitation Therapy, Zhengzhou Central Hospital Affiliated to Zhengzhou University, Zhengzhou, Henan, China (mainland)
| | - Yi-Fu Yu
- Department of Rehabilitation Therapy, Zhengzhou Central Hospital Affiliated to Zhengzhou University, Zhengzhou, Henan, China (mainland)
| | - Wen-Long Ding
- Department of Rehabilitation Therapy, Zhengzhou Central Hospital Affiliated to Zhengzhou University, Zhengzhou, Henan, China (mainland)
| | - Jian-Yong Yu
- Department of Rehabilitation Medicine, Huiji District People's Hospital, Zhengzhou, Henan, China (mainland)
| | - Li Song
- Department of Rehabilitation Therapy, Zhengzhou Central Hospital Affiliated to Zhengzhou University, Zhengzhou, Henan, China (mainland)
| | - Ya-Nan Feng
- Rehabilitation Therapy Center, Luoyang Orthopedics Hospital of Henan Province, Orthopedic Hospital of Henan Province, Luoyang, Henan, China (mainland)
| | - Zhi-Jie Zhang
- Rehabilitation Therapy Center, Luoyang Orthopedics Hospital of Henan Province, Orthopedic Hospital of Henan Province, Luoyang, Henan, China (mainland)
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Li J, Wang LH, Xiang FG, Ding WL, Xi LJ, Wang MQ, Xiao ZJ, Liu JG. Pseudomonas phragmitis sp. nov., isolated from petroleum polluted river sediment. Int J Syst Evol Microbiol 2020; 70:364-372. [PMID: 31661054 DOI: 10.1099/ijsem.0.003763] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A Gram-stain-negative, rod-shaped bacterium, motile by means of a single polar flagellum, designated S-6-2T, was isolated from petroleum polluted river sediment in Huangdao, Shandong Province, PR China. The 16S rRNA gene sequence analysis revealed that S-6-2T represented a member of the genus Pseudomonas, sharing the highest sequence similarities with Pseudomonas parafulva (97.5 %) and Pseudomonas fulva (97.5 %). Phylogenetic analysis based on 16S rRNA gene, concatenated 16S rRNA, gyrB, rpoB and rpoD genes and genome core-genes indicated that S-6-2T was affiliated with the members of the Pseudomonas pertucinogena group. The average nucleotide identity (ANI) and genome-to-genome distance between the whole genome sequences of S-6-2T and closely related species of the genus Pseudomonas within the P. pertucinogena group were less than 77.94 % and 20.5 %, respectively. Differences in phenotypic characteristics were also found between S-6-2T and the closely related species. The major cellular fatty acids (>10 %) were summed feature 8 (C18 : 1ω7c/ C18 : 1ω6c), C16 : 0, C17 : 0cyclo and C12 : 0. The predominant respiratory quinone was ubiquinone 9. The major polar lipids were diphosphatidylglycerol (DPG), phosphatidylglycerol (PG), phosphatidylethanolamine (PE), one unidentified lipid (L1), two unidentified phospholipids (PL1 and PL2) and an aminophospholipid (APL). The DNA G+C content of the genome of S-6-2T was 60.1 mol%. On the basis of the evidence from the polyphasic taxonomic study, strain S-6-2T can be classified as representative of a novel species of the genus Pseudomonas, for which the name Pseudomonas phragmitis sp. nov. is proposed. The type strain is S-6-2T (=CGMCC 1.15798T=KCTC 52539T).
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Affiliation(s)
- Jing Li
- State Key Laboratory of Heavy Oil Processing & Center for Bioengineering and Biotechnology, College of Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, PR China
| | - Lin-Hui Wang
- State Key Laboratory of Heavy Oil Processing & Center for Bioengineering and Biotechnology, College of Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, PR China
| | - Fan-Gqin Xiang
- State Key Laboratory of Heavy Oil Processing & Center for Bioengineering and Biotechnology, College of Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, PR China
| | - Wen-Long Ding
- State Key Laboratory of Heavy Oil Processing & Center for Bioengineering and Biotechnology, College of Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, PR China
| | - Li-Jun Xi
- State Key Laboratory of Heavy Oil Processing & Center for Bioengineering and Biotechnology, College of Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, PR China
| | - Ming-Qing Wang
- Shandong Peanut Research Institute, Qingdao 266100, PR China.,State Key Laboratory of Heavy Oil Processing & Center for Bioengineering and Biotechnology, College of Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, PR China
| | - Zi-Jun Xiao
- State Key Laboratory of Heavy Oil Processing & Center for Bioengineering and Biotechnology, College of Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, PR China
| | - Jian-Guo Liu
- State Key Laboratory of Heavy Oil Processing & Center for Bioengineering and Biotechnology, College of Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, PR China
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Hou YN, Ding WL, Hu JL, Jiang XX, Tan ZZ, Zhao KH. Very Bright Phycoerythrobilin Chromophore for Fluorescence Biolabeling. Chembiochem 2019; 20:2777-2783. [PMID: 31145526 DOI: 10.1002/cbic.201900273] [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] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2019] [Indexed: 11/07/2022]
Abstract
Biliproteins have extended the spectral range of fluorescent proteins into the far-red (FR) and near-infrared (NIR) regions. These FR and NIR fluorescent proteins are suitable for the bioimaging of mammalian tissues and are indispensable for multiplex labeling. Their application, however, presents considerable challenges in increasing their brightness, while maintaining emission in FR regions and oligomerization of monomers. Two fluorescent biliprotein triads, termed BDFP1.2/1.6:3.3:1.2/1.6, are reported. In mammalian cells, these triads not only have extremely high brightness in the FR region, but also have monomeric oligomerization. The BDFP1.2 and BDFP1.6 domains covalently bind to biliverdin, which is accessible in most cells. The BDFP3.3 domain noncovalently binds phycoerythrobilin that is added externally. A new method of replacing phycoerythrobilin with proteolytically digested BDFP3.3 facilitates this labeling. BDFP3.3 has a very high fluorescence quantum yield of 66 %, with maximal absorbance at λ=608 nm and fluorescence at λ=619 nm. In BDFP1.2/1.6:3.3:1.2/1.6, the excitation energy that is absorbed in the red region by phycoerythrobilin in the BDFP3.3 domain is transferred to biliverdin in the two BDFP1.2 or BDFP1.6 domains and fluoresces at λ≈670 nm. The combination of BDFP3.3 and BDFP1.2/1.6:3.3:1.2/1.6 can realize dual-color labeling. Labeling various proteins by fusion to these new fluorescent biliproteins is demonstrated in prokaryotic and mammalian cells.
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Affiliation(s)
- Ya-Nan Hou
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, P. R. China
| | - Wen-Long Ding
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, P. R. China
| | - Ji-Ling Hu
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, P. R. China
| | - Xiang-Xiang Jiang
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, P. R. China
| | - Zi-Zhu Tan
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, P. R. China
| | - Kai-Hong Zhao
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, P. R. China
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Li XD, Tan ZZ, Ding WL, Hou YN, Kong CD, Zhao BQ, Zhao KH. Design of small monomeric and highly bright near-infrared fluorescent proteins. Biochimica et Biophysica Acta (BBA) - Molecular Cell Research 2019; 1866:1608-1617. [DOI: 10.1016/j.bbamcr.2019.06.018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2019] [Revised: 06/21/2019] [Accepted: 06/30/2019] [Indexed: 11/16/2022]
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Zhao BQ, Ding WL, Tan ZZ, Tang QY, Zhao KH. A Large Stokes Shift Fluorescent Protein Constructed from the Fusion of Red Fluorescent mCherry and Far-Red Fluorescent BDFP1.6. Chembiochem 2019; 20:1167-1173. [PMID: 30609201 DOI: 10.1002/cbic.201800695] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2018] [Indexed: 01/17/2023]
Abstract
Phycobiliproteins are constituents of phycobilisomes that can harvest orange, red, and far-red light for photosynthesis in cyanobacteria and red algae. Phycobiliproteins in the phycobilisome cores, such as allophycocyanins, absorb far-red light to funnel energy to the reaction centers. Therefore, allophycocyanin subunits have been engineered as far-red fluorescent proteins, such as BDFP1.6. However, most current fluorescent probes have small Stokes shifts, which limit their applications in multicolor bioimaging. mCherry is an excellent fluorescent protein that has maximal emittance in the red spectral range and a high fluorescence quantum yield, and thus, can be used as a donor for energy transfer to a far-red acceptor, such as BDFP1.6, by FRET. In this study, mCherry was fused with BDFP1.6, which resulted in a highly bright far-red fluorescent protein, BDFP2.0, with a large Stokes shift (≈79 nm). The excitation energy was absorbed maximally at 587 nm by mCherry and transferred to BDFP1.6 efficiently; thus emitting strong far-red fluorescence maximally at 666 nm. The effective brightness of BDFP2.0 in mammalian cells was 4.2-fold higher than that of iRFP670, which has been reported as the brightest far-red fluorescent protein. The large Stokes shift of BDFP2.0 facilitates multicolor bioimaging. Therefore, BDFP2.0 not only biolabels mammalian cells, including human cells, but also biolabels various intracellular components in dual-color imaging.
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Affiliation(s)
- Bao-Qing Zhao
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, P.R. China
| | - Wen-Long Ding
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, P.R. China
| | - Zi-Zhu Tan
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, P.R. China
| | - Qi-Ying Tang
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, P.R. China
| | - Kai-Hong Zhao
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan, 430070, P.R. China
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Abstract
OBJECTIVE To help patients with disabilities of the arm and shoulder recover the accuracy and stability of movements, a novel and simple virtual rehabilitation and evaluation system called the Kine-VRES system was developed using Microsoft Kinect. METHODS First, several movements and virtual tasks were designed to increase the coordination, control and speed of the arm movements. The movements of the patients were then captured using the Kinect sensor, and kinematics-based interaction and real-time feedback were integrated into the system to enhance the motivation and self-confidence of the patient. Finally, a quantitative evaluation method of upper limb movements was provided using the recorded kinematics during hand-to-hand movement. RESULTS A preliminary study of this rehabilitation system indicates that the shoulder movements of two participants with ataxia became smoother after three weeks of training (one hour per day). CONCLUSION This case study demonstrated the effectiveness of the designed system, which could be promising for the rehabilitation of patients with upper limb disorders.
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Affiliation(s)
- W L Ding
- Laboratory of Pattern Recognition and Intelligent Systems, Key Laboratory of Industrial Computer Control Engineering of Hebei Province, Department of Automation, Institute of Electrical Engineering, Yanshan University, Qinghuangdao, Hebei, China
| | - Y Z Zheng
- Laboratory of Pattern Recognition and Intelligent Systems, Key Laboratory of Industrial Computer Control Engineering of Hebei Province, Department of Automation, Institute of Electrical Engineering, Yanshan University, Qinghuangdao, Hebei, China
| | - Y P Su
- Qinhuangdao First People's Hospital, Qinhuangdao, Hebei, China
| | - X L Li
- National Key Laboratory of Cognitive Neuroscience and Learning, Beijing Normal University, Beijing, China
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Hou YN, Ding WL, Jiang SP, Miao D, Tan ZZ, Hu JL, Scheer H, Zhao KH. Bright near-infrared fluorescence bio-labeling with a biliprotein triad. Biochim Biophys Acta Mol Cell Res 2018; 1866:277-284. [PMID: 30471307 DOI: 10.1016/j.bbamcr.2018.11.008] [Citation(s) in RCA: 8] [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] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Revised: 10/22/2018] [Accepted: 11/16/2018] [Indexed: 10/27/2022]
Abstract
Biliproteins have extended the spectral range of fluorescent proteins into the near-infrared region (NIR, 700-770 nm) of maximal transmission of most tissues and are also favorable for multiplex labeling. Their application, however, presents considerable challenges to increase their stability under physiological conditions and, in particular, to increase their brightness while maintaining the emission in near-infrared regions: their fluorescence yield generally decreases with increasing wavelengths, and their effective brightness depends strongly on the environmental conditions. We report a fluorescent biliprotein triad, termed BDFP1.1:3.1:1.1, that combines a large red-shift (722 nm) with high brightness in mammalian cells and high stability under changing environmental conditions. It is fused from derivatives of the phycobilisome core subunits, ApcE2 and ApcF2. These two subunits are induced by far-red light (FR, 650-700 nm) in FR acclimated cyanobacteria. Two BDFP1.1 domains engineered from ApcF2 covalently bind biliverdin that is accessible in most cells. The soluble BDFP3 domain, engineered from ApcE2, binds phytochromobilin non-covalently, generating BDFP3.1. This phytochromobilin chromophore was added externally; it is readily generated by an improved synthesis in E. coli and subsequent extraction. Excitation energy absorbed in the FR by covalently bound biliverdins in the two BDFP1.1 domains is transferred via fluorescence resonance energy transfer to the non-covalently bound phytochromobilin in the BDFP3.1 domain fluorescing in the NIR around 720 nm. Labeling of a variety of proteins by fusion to the biliprotein triad is demonstrated in prokaryotic and mammalian cells, including human cell lines.
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Affiliation(s)
- Ya-Nan Hou
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Wen-Long Ding
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Su-Ping Jiang
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Dan Miao
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Zi-Zhu Tan
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Ji-Ling Hu
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, PR China
| | - Hugo Scheer
- Department Biologie I, Universität München, Menzinger Str. 67, D-80638 München, Germany
| | - Kai-Hong Zhao
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, PR China.
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Ding WL, Hou YN, Tan ZZ, Jiang SP, Miao D, Losi A, Gärtner W, Scheer H, Zhao KH. Far-red acclimating cyanobacterium as versatile source for bright fluorescent biomarkers. Biochimica et Biophysica Acta (BBA) - Molecular Cell Research 2018; 1865:1649-1656. [DOI: 10.1016/j.bbamcr.2018.08.015] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Revised: 08/19/2018] [Accepted: 08/23/2018] [Indexed: 01/27/2023]
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Ding WL, Miao D, Hou YN, Jiang SP, Zhao BQ, Zhou M, Scheer H, Zhao KH. Small monomeric and highly stable near-infrared fluorescent markers derived from the thermophilic phycobiliprotein, ApcF2. Biochimica et Biophysica Acta (BBA) - Molecular Cell Research 2017; 1864:1877-1886. [DOI: 10.1016/j.bbamcr.2017.08.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Revised: 07/13/2017] [Accepted: 08/02/2017] [Indexed: 01/05/2023]
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Xu QZ, Tang QY, Han JX, Ding WL, Zhao BQ, Zhou M, Gärtner W, Scheer H, Zhao KH. Chromophorylation (in Escherichia coli) of allophycocyanin B subunits from far-red light acclimated Chroococcidiopsis thermalis sp. PCC7203. Photochem Photobiol Sci 2017; 16:1153-1161. [PMID: 28594045 DOI: 10.1039/c7pp00066a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Cyanobacterial phycobilisomes funnel the harvested light energy to the reaction centers via two terminal emitters, allophycocyanin B and the core-membrane linker. ApcD is the α-subunit of allophycocyanin B responsible for its red-shifted absorbance (λmax 665 nm). Far-red photo-acclimated cyanobacteria contain certain allophycocyanins that show even further red-shifted absorbances (λmax > 700 nm). We studied the chromophorylation of the three far-red induced ApcD subunits ApcD2, ApcD3 and ApcD4 from Chroococcidiopsis thermalis sp. PCC7203 during the expression in E. coli. The complex behavior emphasizes that a variety of factors contribute to the spectral red-shift. Only ApcD2 bound phycocyanobilin covalently at the canonical position C81, while ApcD3 and ApcD4 gave only traces of stable products. The product of ApcD2 was, however, heterogeneous. The major fraction had a broad absorption around 560 nm and double-peaked fluorescence at 615 and 670 nm. A minor fraction was similar to the product of conventional ApcD, with maximal absorbance around 610 nm and fluorescence around 640 nm. The heterogeneity was lost in C65 and C132 variants; in these variants only the conventional product was formed. With ApcD4, a red-shifted product carrying non-covalently bound phycocyanobilin could be detected in the supernatant after cell lysis. While this chromophore was lost during purification, it could be stabilized by co-assembly with a far-red light-induced β-subunit, ApcB3.
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Affiliation(s)
- Qian-Zhao Xu
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, P.R. China.
| | - Qi-Ying Tang
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, P.R. China.
| | - Jia-Xin Han
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, P.R. China.
| | - Wen-Long Ding
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, P.R. China.
| | - Bao-Qing Zhao
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, P.R. China.
| | - Ming Zhou
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, P.R. China.
| | - Wolfgang Gärtner
- Max-Planck-Institute for Chemical Energy Conversion, Stiftstrasse 34-36, D-45470 Mülheim, Germany
| | - Hugo Scheer
- Department Biologie I, Universität München, D-80638 München, Germany
| | - Kai-Hong Zhao
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, P.R. China.
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Lu L, Zhao BQ, Miao D, Ding WL, Zhou M, Scheer H, Zhao KH. A Simple Preparation Method for Phytochromobilin. Photochem Photobiol 2017; 93:675-680. [DOI: 10.1111/php.12710] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Accepted: 11/16/2016] [Indexed: 12/23/2022]
Affiliation(s)
- Lu Lu
- State Key Laboratory of Agricultural Microbiology; Huazhong Agricultural University; Wuhan China
| | - Bao-Qing Zhao
- State Key Laboratory of Agricultural Microbiology; Huazhong Agricultural University; Wuhan China
| | - Dan Miao
- State Key Laboratory of Agricultural Microbiology; Huazhong Agricultural University; Wuhan China
| | - Wen-Long Ding
- State Key Laboratory of Agricultural Microbiology; Huazhong Agricultural University; Wuhan China
| | - Ming Zhou
- State Key Laboratory of Agricultural Microbiology; Huazhong Agricultural University; Wuhan China
| | - Hugo Scheer
- Department Biologie I; Universität München; München Germany
| | - Kai-Hong Zhao
- State Key Laboratory of Agricultural Microbiology; Huazhong Agricultural University; Wuhan China
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Miao D, Ding WL, Zhao BQ, Lu L, Xu QZ, Scheer H, Zhao KH. Adapting photosynthesis to the near-infrared: non-covalent binding of phycocyanobilin provides an extreme spectral red-shift to phycobilisome core-membrane linker from Synechococcus sp. PCC7335. Biochimica et Biophysica Acta (BBA) - Bioenergetics 2016; 1857:688-94. [DOI: 10.1016/j.bbabio.2016.03.033] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2016] [Revised: 03/10/2016] [Accepted: 03/31/2016] [Indexed: 12/11/2022]
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15
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Pei JP, Jiang LF, Ji XW, Xiao W, Deng XZ, Zhou ZX, Zhu DY, Ding WL, Zhang JH, Wang CJ, Jing K. The relevance of Tim-3 polymorphisms and F protein to the outcomes of HCV infection. Eur J Clin Microbiol Infect Dis 2016; 35:1377-86. [PMID: 27230511 DOI: 10.1007/s10096-016-2676-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2016] [Accepted: 05/09/2016] [Indexed: 12/31/2022]
Abstract
Hepatitis C virus (HCV) is one of the major causes of liver inflammation. The aim of this study was to investigate the associations of T-cell immunoglobulin and mucin domain-3 (Tim-3) polymorphisms and the alternate reading frame protein (F protein) with the outcomes of HCV infection. Three single-nucleotide polymorphisms (SNPs; rs10053538, rs12186731, and rs13170556) of Tim-3 were genotyped in this study, which included 203 healthy controls, 558 hepatitis C anti-F-positive patients, and 163 hepatitis C anti-F-negative patients. The results revealed that the rs12186731 CT and rs13170556 TC and CC genotypes were significantly less frequent in the anti-F-positive patients [odds ratio (OR) = 0.54, 95 % confidence interval (CI) = 0.35-0.83, p = 0.005; OR = 0.26, 95 % CI = 0.18-0.39, p < 0.001; and OR = 0.19, 95 % CI = 0.10-0.35, p < 0.001, respectively), and the rs13170556 TC genotype was more frequent in the chronic HCV (CHC) patients (OR = 1.70, 95 % CI = 1.20-2.40, p = 0.002). The combined analysis of the rs12186731 CT and rs13170556 TC/CC genotypes revealed a locus-dosage protective effect in the anti-F-positive patients (OR = 0.22, 95 % CI = 0.14-0.33, p trend < 0.001). Stratified analyses revealed that the frequencies of the rs12186731 (CT + TT) genotypes were significantly lower in the older (OR = 0.31, 95 % CI = 0.15-0.65, p = 0.002) and female (OR = 0.30, 95 % CI = 0.17-0.52, p < 0.001) subgroups, and rs13170556 (TC + CC) genotypes exhibited the same effect in all subgroups (all p < 0.001) in the anti-F antibody generations. Moreover, the rs13170556 (TC + CC) genotypes were significantly more frequent in the younger (OR = 1.86, 95 % CI = 1.18-2.94, p = 0.007) and female (OR = 2.38, 95 % CI = 1.48-3.83, p < 0.001) subgroups of CHC patients. These findings suggest that the rs12186731 CT and rs13170556 TC/CC genotypes of Tim-3 provide potential protective effects with the F protein in the outcomes of HCV infection and that these effects are related to sex and age.
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Affiliation(s)
- J P Pei
- Department of Biochemistry and Molecular Biology, School of Basic Medicine, Nanjing Medical University, Nanjing, 210029, China
| | - L F Jiang
- Department of Infectious Diseases, The First Affiliated Hospital with Nanjing Medical University, Nanjing, 210002, China
| | - X W Ji
- Department of Biochemistry and Molecular Biology, School of Basic Medicine, Nanjing Medical University, Nanjing, 210029, China
| | - W Xiao
- School of Life Science and Technology, China Pharmaceutical University, Nanjing, 210009, China.
| | - X Z Deng
- Department of Biochemistry and Molecular Biology, School of Basic Medicine, Nanjing Medical University, Nanjing, 210029, China. .,Huadong Research Institute for Medicine and Biotechnics, No. 293, Zhongshan East Road, Nanjing, 210002, China.
| | - Z X Zhou
- Department of Clinical Laboratory, Nanjing Second Hospital, Nanjing, China
| | - D Y Zhu
- Department of Infectious Diseases at Luoyang Central Hospital Affiliated to Zhengzhou University, Luoyang, 471000, China
| | - W L Ding
- Department of Clinical Laboratory, Yixing People's Hospital, Yixing, 214200, China
| | - J H Zhang
- Huadong Research Institute for Medicine and Biotechnics, No. 293, Zhongshan East Road, Nanjing, 210002, China
| | - C J Wang
- Huadong Research Institute for Medicine and Biotechnics, No. 293, Zhongshan East Road, Nanjing, 210002, China
| | - K Jing
- Faculty of Chemical Engineering, Huaiyin Institute of Technology, Meicheng Road East, Huai'an, 223003, China
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16
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Zhu DY, Jiang LF, Deng XZ, Xiao W, Pei JP, Li BJ, Wang CJ, Zhang JH, Zhang Q, Zhou ZX, Ding WL, Xu XD, Yue M. TBX21 polymorphisms are associated with virus persistence in hepatitis C virus infection patients from a high-risk Chinese population. Eur J Clin Microbiol Infect Dis 2015; 34:1309-18. [PMID: 25759111 DOI: 10.1007/s10096-015-2337-6] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2014] [Accepted: 01/22/2015] [Indexed: 01/29/2023]
Abstract
Hepatitis C virus (HCV) infection is a major cause of chronic liver disease and the varied outcomes of the infection depend on both viral and host factors. We have demonstrated that the HCV alternate reading frame protein (F protein) is related to Th1/Th2 bias which is involved in virus persistence in chronic hepatitis C (CHC) patients. The purpose of this study was to test the hypothesis that genetic variants of TBX21 (T cell specific T-box transcription factor) were associated with the outcomes of HCV infection and F protein generation. Three single nucleotide polymorphisms (SNPs) (rs17250932, rs2074190, rs4794067) in the TBX21 gene were genotyped in a case-control study in a cohort of a high-risk group, including 354 healthy controls and 747 CHC patients (190 anti-F protein antibody seronegative patients and 557 anti-F protein antibody seropositive patients). Results showed that the rs4794067 C allele in the TBX21 promoter was significantly more common in CHC patients (OR = 1.335, 95% CI = 1.058-1.684, P = 0.015), exceptionally in anti-F protein seropositive patients (OR = 1.547, 95% CI = 1.140-2.101, P = 0.005), compared with healthy controls. And the risk effect was also significantly high in patients with HCV 1b genotype and mild fibrosis (P = 0.021, P = 0.010, respectively). Compared with the most frequent haplotype TAT, haplotype analysis showed that the distribution of TAC was significantly different between the chronic HCV carrier group and the healthy group, and so was the anti-F antibody seronegativity group and the anti-F antibody seronegativity group (all P < 0.001). Our results suggested that TBX21 variants may be involved in the etiology of this disease.
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Affiliation(s)
- D Y Zhu
- Department of Biochemistry and Molecular Biology, School of Basic Medicine, Nanjing Medical University, No. 293, Zhongshan East Road, Nanjing, 210002, China
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Peng PP, Dong LL, Sun YF, Zeng XL, Ding WL, Scheer H, Yang X, Zhao KH. The structure of allophycocyanin B fromSynechocystisPCC 6803 reveals the structural basis for the extreme redshift of the terminal emitter in phycobilisomes. ACTA ACUST UNITED AC 2014; 70:2558-69. [DOI: 10.1107/s1399004714015776] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Accepted: 07/06/2014] [Indexed: 11/10/2022]
Abstract
Allophycocyanin B (AP-B) is one of the two terminal emitters in phycobilisomes, the unique light-harvesting complexes of cyanobacteria and red algae. Its low excitation-energy level and the correspondingly redshifted absorption and fluorescence emission play an important role in funnelling excitation energy from the hundreds of chromophores of the extramembraneous phycobilisome to the reaction centres within the photosynthetic membrane. In the absence of crystal structures of these low-abundance terminal emitters, the molecular basis for the extreme redshift and directional energy transfer is largely unknown. Here, the crystal structure of trimeric AP-B [(ApcD/ApcB)3] fromSynechocystissp. PCC 6803 at 1.75 Å resolution is reported. In the crystal lattice, eight trimers of AP-B form a porous, spherical, 48-subunit assembly of 193 Å in diameter with an internal cavity of 1.1 × 106 Å3. While the overall structure of trimeric AP-B is similar to those reported for many other phycobiliprotein trimers, the chromophore pocket of the α-subunit, ApcD, has more bulky residues that tightly pack the phycocyanobilin (PCB). Ring D of the chromophores is further stabilized by close interactions with ApcB from the adjacent monomer. The combined contributions from both subunits render the conjugated rings B, C and D of the PCB in ApcD almost perfectly coplanar. Together with mutagenesis data, it is proposed that the enhanced planarity effectively extends the conjugation system of PCB and leads to the redshifted absorption (λmax= 669 nm) and fluorescence emission (679 nm) of the ApcD chromophore in AP-B, thereby enabling highly efficient energy transfer from the phycobilisome core to the reaction centres.
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Zhou W, Ding WL, Zeng XL, Dong LL, Zhao B, Zhou M, Scheer H, Zhao KH, Yang X. Structure and mechanism of the phycobiliprotein lyase CpcT. J Biol Chem 2014; 289:26677-26689. [PMID: 25074932 PMCID: PMC4175310 DOI: 10.1074/jbc.m114.586743] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [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: 06/03/2014] [Revised: 07/24/2014] [Indexed: 12/15/2022] Open
Abstract
Pigmentation of light-harvesting phycobiliproteins of cyanobacteria requires covalent attachment of open-chain tetrapyrroles, bilins, to the apoproteins. Thioether formation via addition of a cysteine residue to the 3-ethylidene substituent of bilins is mediated by lyases. T-type lyases are responsible for attachment to Cys-155 of phycobiliprotein β-subunits. We present crystal structures of CpcT (All5339) from Nostoc (Anabaena) sp. PCC 7120 and its complex with phycocyanobilin at 1.95 and 2.50 Å resolution, respectively. CpcT forms a dimer and adopts a calyx-shaped β-barrel fold. Although the overall structure of CpcT is largely retained upon chromophore binding, arginine residues at the opening of the binding pocket undergo major rotameric rearrangements anchoring the propionate groups of phycocyanobilin. Based on the structure and mutational analysis, a reaction mechanism is proposed that accounts for chromophore stabilization and regio- and stereospecificity of the addition reaction. At the dimer interface, a loop extending from one subunit partially shields the opening of the phycocyanobilin binding pocket in the other subunit. Deletion of the loop or disruptions of the dimer interface significantly reduce CpcT lyase activity, suggesting functional relevance of the dimer. Dimerization is further enhanced by chromophore binding. The chromophore is largely buried in the dimer, but in the monomer, the 3-ethylidene group is accessible for the apophycobiliprotein, preferentially from the chromophore α-side. Asp-163 and Tyr-65 at the β- and α-face near the E-configured ethylidene group, respectively, support the acid-catalyzed nucleophilic Michael addition of cysteine 155 of the apoprotein to an N-acylimmonium intermediate proposed by Grubmayr and Wagner (Grubmayr, K., and Wagner, U. G. (1988) Monatsh. Chem. 119, 965-983).
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Affiliation(s)
- Wei Zhou
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
| | - Wen-Long Ding
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
| | - Xiao-Li Zeng
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
| | - Liang-Liang Dong
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
| | - Bin Zhao
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
| | - Ming Zhou
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China
| | - Hugo Scheer
- Department of Biologie I, Universität München, Menzinger Str. 67, D-80638 München, Germany
| | - Kai-Hong Zhao
- State Key Laboratory of Agricultural Microbiology, Huazhong Agricultural University, Wuhan 430070, China,.
| | - Xiaojing Yang
- Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, Illinois 60637, and; Department of Chemistry, University of Illinois at Chicago, Chicago, Illinois 60607.
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Ablikim M, Achasov MN, Alberto D, Ambrose DJ, An FF, An Q, An ZH, Bai JZ, Ferroli RB, Ban Y, Becker J, Berger N, Bertani MB, Bian JM, Boger E, Bondarenko O, Boyko I, Briere RA, Bytev V, Cai X, Calcaterra AC, Cao GF, Chang JF, Chelkov G, Chen G, Chen HS, Chen HX, Chen JC, Chen ML, Chen SJ, Chen Y, Chen YB, Cheng HP, Chu YP, Cronin-Hennessy D, Dai HL, Dai JP, Dedovich D, Deng ZY, Denysenko I, Destefanis M, Ding WL, Ding Y, Dong LY, Dong MY, Du SX, Fang J, Fang SS, Feng CQ, Fu CD, Fu JL, Gao Y, Geng C, Goetzen K, Gong WX, Greco M, Gu MH, Gu YT, Guan YH, Guo AQ, Guo LB, Guo YP, Han YL, Hao XQ, Harris FA, He KL, He M, He ZY, Heng YK, Hou ZL, Hu HM, Hu JF, Hu T, Huang B, Huang GM, Huang JS, Huang XT, Huang YP, Hussain T, Ji CS, Ji Q, Ji XB, Ji XL, Jia LK, Jiang LL, Jiang XS, Jiao JB, Jiao Z, Jin DP, Jin S, Jing FF, Kalantar-Nayestanaki N, Kavatsyuk M, Kuehn W, Lai W, Lange JS, Leung JKC, Li CH, Li C, Li C, Li DM, Li F, Li G, Li HB, Li JC, Li K, Li L, Li NB, Li QJ, Li SL, Li WD, Li WG, Li XL, Li XN, Li XQ, Li XR, Li ZB, Liang H, Liang YF, Liang YT, Liao GR, Liao XT, Liu BJ, Liu CL, Liu CX, Liu CY, Liu FH, Liu F, Liu F, Liu H, Liu HB, Liu HH, Liu HM, Liu HW, Liu JP, Liu K, Liu K, Liu KY, Liu Q, Liu SB, Liu X, Liu XH, Liu YB, Liu Y, Liu ZA, Liu Z, Liu Z, Loehner H, Lu GR, Lu HJ, Lu JG, Lu QW, Lu XR, Lu YP, Luo CL, Luo MX, Luo T, Luo XL, Lv M, Ma CL, Ma FC, Ma HL, Ma QM, Ma S, Ma T, Ma XY, Maggiora M, Malik QA, Mao H, Mao YJ, Mao ZP, Messchendorp JG, Min J, Min TJ, Mitchell RE, Mo XH, Muchnoi NY, Nefedov Y, Nikolaev IB, Ning Z, Olsen SL, Ouyang Q, Pacetti SP, Park JW, Pelizaeus M, Peters K, Ping JL, Ping RG, Poling R, Pun CSJ, Qi M, Qian S, Qiao CF, Qin XS, Qiu JF, Rashid KH, Rong G, Ruan XD, Sarantsev A, Schulze J, Shao M, Shen CP, Shen XY, Sheng HY, Shepherd MR, Song XY, Spataro S, Spruck B, Sun DH, Sun GX, Sun JF, Sun SS, Sun XD, Sun YJ, Sun YZ, Sun ZJ, Sun ZT, Tang CJ, Tang X, Thorndike EH, Tian HL, Toth D, Varner GS, Wang B, Wang BQ, Wang K, Wang LL, Wang LL, Wang LS, Wang M, Wang P, Wang PL, Wang Q, Wang QJ, Wang SG, Wang XF, Wang XL, Wang YD, Wang YF, Wang YQ, Wang Z, Wang ZG, Wang ZY, Wei DH, Wen QG, Wen SP, Wiedner U, Wu LH, Wu N, Wu W, Wu Z, Xiao ZJ, Xie YG, Xiu QL, Xu GF, Xu GM, Xu H, Xu QJ, Xu XP, Xu Y, Xu ZR, Xue Z, Yan L, Yan WB, Yan YH, Yang HX, Yang T, Yang Y, Yang YX, Ye H, Ye M, Ye MH, Yu BX, Yu CX, Yu SP, Yuan CZ, Yuan WL, Yuan Y, Zafar AA, Zallo AZ, Zeng Y, Zhang BX, Zhang BY, Zhang CC, Zhang DH, Zhang HH, Zhang HY, Zhang J, Zhang JQ, Zhang JW, Zhang JY, Zhang JZ, Zhang L, Zhang SH, Zhang TR, Zhang XJ, Zhang XY, Zhang Y, Zhang YH, Zhang YS, Zhang ZP, Zhang ZY, Zhao G, Zhao HS, Zhao J, Zhao L, Zhao L, Zhao MG, Zhao Q, Zhao SJ, Zhao TC, Zhao XH, Zhao YB, Zhao ZG, Zhemchugov A, Zheng B, Zheng JP, Zheng YH, Zheng ZP, Zhong B, Zhong J, Zhou L, Zhou XK, Zhou XR, Zhu C, Zhu K, Zhu KJ, Zhu SH, Zhu XL, Zhu XW, Zhu YS, Zhu ZA, Zhuang J, Zou BS, Zou JH, Zuo JX. Measurements of the mass and width of the η(c) using the decay ψ(3686)→γη(c). Phys Rev Lett 2012; 108:222002. [PMID: 23003588 DOI: 10.1103/physrevlett.108.222002] [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] [Subscribe] [Scholar Register] [Received: 11/02/2011] [Indexed: 06/01/2023]
Abstract
The mass and width of the lowest-lying S-wave spin singlet charmonium state, the η(c), are measured using a data sample of 1.06×10(8) ψ(3686) decays collected with the BESIII detector at the BEPCII storage ring. We use a model that incorporates full interference between the signal reaction, ψ(3686)→γη(c), and a nonresonant radiative background to describe the line shape of the η(c) successfully. We measure the η(c) mass to be 2984.3±0.6±0.6 MeV/c(2) and the total width to be 32.0±1.2±1.0 MeV, where the first errors are statistical and the second are systematic.
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Affiliation(s)
- M Ablikim
- Institute of High Energy Physics, Beijing 100049, People's Republic of China
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Zhu H, Yu WJ, Le Y, Wang WJ, Li F, Gui T, Wang YM, Shi WD, Ding WL, Fan XQ. High glucose levels increase the expression of neurotrophic factors associated with p-p42/p44 MAPK in Schwann cells in vitro. Mol Med Rep 2012; 6:179-84. [PMID: 22552324 DOI: 10.3892/mmr.2012.896] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2012] [Accepted: 04/12/2012] [Indexed: 11/05/2022] Open
Abstract
Diabetic peripheral neuropathy (DPN) is one of the most common complications of diabetes mellitus. One contributing factor to DPN is altered neurotrophism due to changes in the synthesis and expression of neurotrophins. Schwann cells (SCs) are the myelin-forming cells of the peripheral nervous system that promote nerve regeneration through the expression and secretion of neurotrophic factors (NTFs). Therefore, in this study, using SCs cultured in the presence of high levels of glucose for 24 h, with and without the p42/p44 mitogen-activated protein kinase (MAPK) inhibitor, PD98059, we investigated the effect of high glucose levels on SCs over a short period of time. The cultured cells were evaluated using 3(4,5-dimethylthiazol-2-yl)2,5-diphenyltetrazolium bromide (MTT) assay, Hoechst staining, immunocytochemistry, reverse transcriptase-polymerase chain reaction and western blot analysis. High glucose levels did not promote morphological abnormalities or decrease the viability of SCs. However, high glucose levels enhanced the expression of nerve growth factor (NGF) and brain-derived neurotrophic factor (BDNF) and induced the activation of p42/p44 MAPK in cultured SCs in a dose-dependent manner. Additionally, the phosphorylation of p42/p44 MAPK may be associated with the expression of NTFs by SCs exposed to high glucose conditions; the excessive activation of p42/p44 MAPK inhibited the expression of NTFs. These observations demonstrate that exposure to high glucose levels lead to acutely elevated levels of NGF and BDNF in SCs over a short period of time, which may be involved in the p42/p44 MAPK pathway.
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Affiliation(s)
- Hao Zhu
- Department of Anatomy, Shanghai Jiao Tong University School of Medicine, Shanghai, PR China
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Zhu H, Chen MF, Yu WJ, Wang WJ, Li F, Liu WC, Wo Y, Xia R, Ding WL. Time-dependent changes in BDNF expression of pentylenetetrazole-induced hippocampal astrocytes in vitro. Brain Res 2011; 1439:1-6. [PMID: 22265706 DOI: 10.1016/j.brainres.2011.12.035] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2011] [Revised: 12/13/2011] [Accepted: 12/16/2011] [Indexed: 12/23/2022]
Abstract
Pentylenetetrazole (PTZ), a γ-aminobutyric acid (GABA(A)) receptor antagonist, has been used extensively to induce seizures in animal models of epilepsy. The aim of the present study was to investigate the effects of PTZ on hippocampal astrocytes. Cells were incubated with 10, 20, or 40 mM PTZ for 24h and viability and apoptosis were examined using an MTT assay and Hoechst staining. The high concentration of PTZ (20 and 40 mM) resulted in a significant decrease in viability (MTT: 83.6 ± 7.8% and 69.3 ± 4.2%, respectively) (P<0.01), whereas the lower concentration of PTZ (10mM) did not induce cell apoptosis or reduce viability. When cells were treated with 10mM PTZ for 0, 0.5, 2, 4, 8, 12, or 24h, the level of brain-derived neurotrophic factor (BDNF), both protein and mRNA, was significantly reduced at 2 to 12h of culture (P<0.01), with maximal reduction detected at 8h; expression was restored to near control levels after 24h. Collectively, our results suggest that astrocytes may participate in epilepsy through a marked, but transient decrease in BDNF expression.
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Affiliation(s)
- Hao Zhu
- Department of Anatomy, Institutes of Medical Sciences, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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Zhu H, Li F, Yu WJ, WANG WJ, Li L, Wan LD, Le Y, Ding WL. Effect of Hypoxia/Reoxygenation on Cell Viability and Expression and Secretion of Neurotrophic Factors (NTFs) in Primary Cultured Schwann Cells. Anat Rec (Hoboken) 2010; 293:865-70. [DOI: 10.1002/ar.21105] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Hu JJ, Gu HY, Ding WL, Yuan SJ, Zhong MF, Liu L. Correlation between nNOS Expression and Erectile Dysfunction in Experimental Diabetes Mellitus Rats of Different Ages. Neuroembryology Aging 2009. [DOI: 10.1159/000214864] [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: 11/19/2022]
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He J, Ding WL, Li F, Xia R, Wang WJ, Zhu H. Panaxydol treatment enhances the biological properties of Schwann cells in vitro. Chem Biol Interact 2009; 177:34-9. [DOI: 10.1016/j.cbi.2008.08.012] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2008] [Revised: 08/21/2008] [Accepted: 08/21/2008] [Indexed: 11/15/2022]
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Lin MB, Jin ZM, Yin L, Ding WL, Chen WG, Ni JS, Zhu ZG. [Understanding the planes of total mesorectal excision through surgical anatomy of pelvic fascia]. Zhonghua Wei Chang Wai Ke Za Zhi 2008; 11:308-311. [PMID: 18636348] [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: 05/26/2023]
Abstract
OBJECTIVE To study the relationship of mesorectum with fasciae and nerves in the pelvic cavity and to specify the proper planes of dissection in total mesorectal excision. METHODS Twenty-four pelvises (12 males and 12 females) harvested from cadavers were studied by dissection. RESULTS There were three planes surrounding the rectum as the visceral fascia, vesicohypogastric fascia and parietal fascia. The pelvic plexus and its branches situated between the visceral fascia and the vesicohypogastric fascia. Pelvic splanchnic nerves and hypogastric nerves were observed between the visceral fascia and the parietal fascia. CONCLUSIONS The posterior plane of total mesorectal excision lies between the visceral fascia and the parietal fascia. The lateral dissection should be conducted in a plane between the visceral fascia and the vesicohypogastric fascia. The proper planes for posterior and lateral resection can be identified by the hypogastric nerve and the pelvic plexus respectively.
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Affiliation(s)
- Mou-Bin Lin
- Department of General Surgery, Ruijin Hospital, School of Medicine, Shanghai Jiaotong University, Shanghai, China
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Shen WL, Zhong MF, Ding WL, Wang J, Zheng L, Zhu P, Wang BS, Higashino H, Chen H. Elevated catalase and heme oxygenase-1 may contribute to improved postischaemic cardiac function in long-term type 1 diabetes. Clin Exp Pharmacol Physiol 2008; 35:820-6. [PMID: 18430061 DOI: 10.1111/j.1440-1681.2008.04937.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
1. Although increased oxidative stress has been shown repeatedly to be implicated in diabetes, the cardiovascular anti-oxidant state and heart response to ischaemia in long-term Type 1 diabetes remain largely unknown. The present study was designed to observe heart tolerance to ischaemia-reperfusion and endogenous anti-oxidants in the cardiovascular system in long-term hyperglycaemic rats. 2. Hearts from Sprague-Dawley rats surviving up to 6 months with streptozocin-induced severe hyperglycaemia (blood glucose > 20 mmol/L) were isolated and subjected to global ischaemia and reperfusion. Cardiac function, electrocardiogram and anti-oxidants in the myocardium and aorta were examined. In addition, the morphology of the myocardial mitochondria and the in vitro function of aortic vessels were assessed. 3. Hearts from diabetic rats demonstrated lower baseline heart function but had higher postischaemic coronary flow and left ventricular developed pressure compared with their respective controls (P < 0.05). In addition, hearts from diabetic animals had fewer arrhythmias (P < 0.01) and lower left ventricular end-diastolic pressure during reperfusion (P < 0.05). Higher catalase and heme oxygenase-1 content was found in the aorta and myocardium from diabetic rats (P < 0.01). In aortas from diabetic animals, acetylcholine-induced vasodilatation was enhanced and was approximately 15% after inhibition of nitric oxide synthase, compared with 0% in controls. The 15% relaxation was abrogated by heme oxygenase blockade. Mitochondria from the myocardium of diabetic rats showed significant increases in both size and number (P < 0.05). 4. Hearts of long-term Type 1 diabetic rats demonstrated improved recovery of postischaemic cardiac function and reduced reperfusion arrhythmia. Hyperglycaemia may enhance cardiovascular anti-oxidant capacity and mitochondrial neogenesis, which renders the heart resistant to ischaemia and oxidative injury.
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Affiliation(s)
- Wei-Li Shen
- Department of Pharmacology, Shanghai Jiao Tong University School of Medicine, Shanghai, China
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Liu WC, Ding WL, Gu HY, Chen MF, Hu JJ. Lipopolysaccharide-induced cerebral inflammatory damage and the therapeutic effect of platelet activating factor receptor antagonist. Neurosci Bull 2008; 23:271-6. [PMID: 17952135 DOI: 10.1007/s12264-007-0040-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
OBJECTIVE To investigate lipopolysaccharide (LPS) induced acute cerebral inflammatory damage and the therapeutic effect of ginkgolide B (BN52021). METHODS Thirty Sprague-Dawley rats were randomly divided into 3 groups (n = 10 for each group): Control group, Model group and Treatment group (treated with BN52021). LPS were injected into the fourth ventricle of rat to make a neuroinflammatory murine model. Morris water maze was used to detect the learning and memory ability of rats; changes of synapse number and subcellular ultrastructures were observed under a transmission electron microscope; OX-42 positive microglia in the brain was detected by immunohistochemical method. RESULTS The average escape latency in the Treatment group were significantly shortened than that in the Model group; and the percentage of swimming distance traveled in platform quadrant accounting for total distance increased markedly. The rough endoplasmic reticulum and polyribosomes in the Treatment group were more than that in the Model group, but the number of synapses seemed to have no obvious change. The number of OX-42 positive microglia in the Treatment group decreased markedly than that in the Model group, and the grey density of OX-42-positive cells increased significantly. CONCLUSION LPS can induce inflammatory damages to the brain, but the damage could be antagonized by BN52021. Platelet activating factor receptor antagonist may offer an effective therapy for neurodegeneration diseases.
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Affiliation(s)
- Wen-Chao Liu
- Department of Anatomy, Medical College of Shanghai Jiaotong University, Shanghai 200025, China
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28
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Ding WL, Chen J, Zhang LP, Chen Z, Ding JB, Sun ZG. [Effect of storage methods on breaking seed dormancy of Trollius chinensis Bge]. Zhongguo Zhong Yao Za Zhi 2000; 25:266-9. [PMID: 12512446] [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 Exploring the best seed storage method for Trollius chinensis. METHOD Different temperatures were applied to the seed storage in wet sand and dry sand, and the embryo-endosperm ratio and germination rate were inspected. RESULT The dormancy of T. chinensis seeds could only be broken in lower temperatures. The newly collected seeds set out to germinate after 75 days of storage at 5-6 degrees C when the embryo-endosperm ratio reached 47%, and the time of seed germination varied with the length of storage time before low-temperature treatment. CONCLUSION The best storage method for the seed of T. chinensis is keeping it in dry for 6-8 months with an additional 1 month of low-temperature treatment to follow.
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Affiliation(s)
- W L Ding
- Institute of Medicinal Plants, CAMS and Peking Union Medical College, Beijing 100094, China
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Chen J, Ding WL, Zhang LP, Chen Z. [Investigation on growth and development of Tussilago farfara L. in Beijing]. Zhongguo Zhong Yao Za Zhi 2000; 25:84-6. [PMID: 12212077] [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 provide a scientific basis for the introduction and harvest of T. farfara in Beijing. METHOD Random sampling in late growing period. RESULT T. farfara reached the peak of vegetation growth in early September and concurrently began its reproductive growth. During this period its bud and rhizome began to form and develop and kept growing until the period of freezing weather. CONCLUSION There are two optimum the times for reaping T. farara bud: one is around the fifteenth day before the period of freezing weather, and the other is around the tenth day after the thawing season in the next year.
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Affiliation(s)
- J Chen
- Institute of Medicinal Plants, Chinese Academy of Medical Sciences, Peking Union Medical College, Beijing 100094, China
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