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Wei XL, Du WC, Wang R, Zhou JY, Yu H, Lu Y, Wang LC, Huang CY. [Epidemic characteristics and trend analysis of major injuries deaths among children and adolescents in Jiangsu Province from 2012 to 2021]. Zhonghua Liu Xing Bing Xue Za Zhi 2024; 45:536-541. [PMID: 38678349 DOI: 10.3760/cma.j.cn112338-20230912-00150] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 04/29/2024]
Abstract
Objective: To understand the situation and epidemic characteristics of injury deaths among children aged 5 to 24 years in Jiangsu Province from 2012 to 2021 and the trend of annual changes. Methods: The main injury mortality data of children and adolescents was collected, and the crude and standardized mortality rates of road traffic accidents, drowning, suicide, and accidental falls among children and adolescents over a decade and the annual average percentage of change (AAPC) were calculated. The main injury mortality characteristics and trends of children and adolescents of different age groups and genders were analyzed. Results: The total number of injury deaths among 5 to 24 adolescents in Jiangsu Province was 16 052, with a standardized mortality rate of 9.58/100 000. There was no significant trend in the overall standardized mortality rate of injuries (AAPC=-3.450%, P=0.055). The standardized mortality rate of road traffic injuries among children and adolescents showed a decreasing trend over the past decade, with statistical significance (AAPC=-9.406%, P<0.001). The standardized suicide mortality rate showed an upward trend over the past decade, with statistical significance (AAPC=9.000%, P=0.001). The overall injury mortality rate showed an upward trend with age. Suicide rates in males and females were on the rise and both have statistical significance (AAPC=9.420% and AAPC=9.607%, both P<0.05). The standardized mortality rates of female traffic accidents, drowning, and male traffic accidents showed a decreasing trend and were statistically significant (AAPC for female traffic accidents=-7.364%, AAPC for female drowning=-5.352%, and AAPC for male traffic accidents=-10.242%, all P<0.05). The standardized mortality rate of urban and rural traffic accidents showed a decreasing trend and was statistically significant(AAPC=-7.899% and AAPC=-9.421%, both P<0.001). The standardized suicide mortality rate showed an upward trend and statistical significance (AAPC=11.009% and AAPC=7.528%, both P<0.05). Conclusions: The overall injury situation of children and adolescents in Jiangsu Province improved in the past decade from 2012 to 2021, but the suicide mortality rate was on the rise. It is necessary to focus on the mental health issues of this age group and to strengthen the prevention and control of suicide among children and adolescents, in Jiangsu.
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Affiliation(s)
- X L Wei
- Suzhou Center for Disease Control and Prevention, Suzhou 215004, China
| | - W C Du
- Department of Non-communicable Chronic Disease Control, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - R Wang
- School of Public Health, Southeast University, Nanjing 210009, China
| | - J Y Zhou
- Department of Non-communicable Chronic Disease Control, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - H Yu
- Department of Non-communicable Chronic Disease Control, Jiangsu Provincial Center for Disease Control and Prevention, Nanjing 210009, China
| | - Y Lu
- Suzhou Center for Disease Control and Prevention, Suzhou 215004, China
| | - L C Wang
- Suzhou Center for Disease Control and Prevention, Suzhou 215004, China
| | - C Y Huang
- Suzhou Center for Disease Control and Prevention, Suzhou 215004, China
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Wu HC, Shiu LL, Wang SW, Huang CY, Lee TH, Sung PJ, Kuo YH. Anti-Lymphangiogenic Terpenoids from the Heartwood of Taiwan Juniper, Juniperus chinensis var. tsukusiensis. Plants (Basel) 2023; 12:3828. [PMID: 38005725 PMCID: PMC10674874 DOI: 10.3390/plants12223828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 11/08/2023] [Accepted: 11/09/2023] [Indexed: 11/26/2023]
Abstract
To look in-depth into the phytochemical and pharmacological properties of Taiwan juniper, this study investigated the chemical profiles and anti-lymphangiogenic activity of Juniperus chinensis var. tsukusiensis. In this study, four new sesquiterpenes, 12-acetoxywiddrol (1), cedrol-13-al (2), α-corocalen-15-oic acid (3), 1,3,5-bisaoltrien-10-hydroperoxy-11-ol (4), one new diterpene, 1β,2β-epoxy-9α-hydroxy-8(14),11-totaradiene-3,13-dione (5), and thirty-three known terpenoids were successfully isolated from the heartwood of J. chinensis var. tsukusiensis. The structures of all isolates were determined through the analysis of physical data (including appearance, UV, IR, and optical rotation) and spectroscopic data (including 1D, 2D NMR, and HRESIMS). Thirty-four compounds were evaluated for their anti-lymphangiogenic effects in human lymphatic endothelial cells (LECs). Among them, totarolone (6) displayed the most potent anti-lymphangiogenic activity by suppressing cell growth (IC50 = 6 ± 1 µM) of LECs. Moreover, 3β-hydroxytotarol (7), 7-oxototarol (8), and 1-oxo-3β-hydroxytotarol (9) showed moderate growth-inhibitory effects on LECs with IC50 values of 29 ± 1, 28 ± 1, and 45 ± 2 µM, respectively. Totarolone (6) also induced a significant concentration-dependent inhibition of LEC tube formation (IC50 = 9.3 ± 2.5 µM) without cytotoxicity. The structure-activity relationship discussion of aromatic totarane-type diterpenes against lymphangiogenesis of LECs is also included in this study. Altogether, our findings unveiled the promising potential of J. chinensis var. tsukusiensis in developing therapeutics targeting tumor lymphangiogenesis.
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Affiliation(s)
- Ho-Cheng Wu
- Graduate Institute of Pharmacognosy, College of Pharmacy, Taipei Medical University, Taipei 110, Taiwan;
- Ph.D. Program in Clinical Drug Development of Herbal Medicine, College of Pharmacy, Taipei Medical University, Taipei 110, Taiwan
- School of Pharmacy, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 807, Taiwan
- Traditional Herbal Medicine Research Center, Taipei Medical University Hospital, Taipei 110, Taiwan
| | - Lung-Lin Shiu
- Department of Chemistry, National Taiwan University, Taipei 106, Taiwan;
| | - Shih-Wei Wang
- Institute of Biomedical Sciences, MacKay Medical College, New Taipei City 252, Taiwan; (S.-W.W.); (C.-Y.H.)
- Department of Medicine, MacKay Medical College, New Taipei City 252, Taiwan
- Graduate Institute of Natural Products, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 807, Taiwan
| | - Chia-Ying Huang
- Institute of Biomedical Sciences, MacKay Medical College, New Taipei City 252, Taiwan; (S.-W.W.); (C.-Y.H.)
- Department of Chinese Medicine, MacKay Memorial Hospital, Taipei 104, Taiwan
| | - Tzong-Huei Lee
- Institute of Fisheries Science, National Taiwan University, Taipei 106, Taiwan;
| | - Ping-Jyun Sung
- National Museum of Marine Biology and Aquarium, Pingtung 944, Taiwan;
- Department of Marine Biotechnology and Resources, National Sun Yat-sen University, Kaohsiung 804, Taiwan
| | - Yueh-Hsiung Kuo
- Department of Chinese Pharmaceutical Sciences and Chinese Medicine Resources, China Medical University, Taichung 404, Taiwan
- Chinese Medicine Research Center, China Medical University, Taichung 404, Taiwan
- Department of Biotechnology, Asia University, Taichung 413, Taiwan
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Zhang JJ, Guo HY, Shang CL, Liu L, Huang CY, Wu ZX, Li Y, Wu Y, Li HJ, Liang HM, Xu B. [Investigation of familial tendency of endometriosis]. Zhonghua Fu Chan Ke Za Zhi 2023; 58:501-507. [PMID: 37474323 DOI: 10.3760/cma.j.cn112141-20221222-00768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 07/22/2023]
Abstract
Objective: To investigate the familial heritability of endometriosis and to compare the clinical characteristics of patients with or without a family history of endometriosis. Methods: From January 2020 to June 2022, 850 patients with endometriosis confirmed by laparotomy or laparoscopy in Peking University Third Hospital were included in this study. Clinical data were collected, family history was followed up, and the differences of clinical indicators between patients with and without family history of endometriosis were compared. Results: A total of 850 patients were enrolled, with an average age of (33.8±7.0) years old, 315 (37.1%, 315/850) patients in stage Ⅲ and 496 (58.4%, 496/850) patients in stage Ⅳ. There were 100 patients with family history of endometriosis, accounting for 11.8% (100/850). Most of the 113 relatives involved were mothers, daughters and sisters (76.1%, 86/113), 81.5% (22/27) of the second and third degree relatives were maternal relatives. The median ages of patients with and without family history of endometriosis were 30 and 33 years old respectively at the time of diagnosis. The unmarried rate of patients with family history was higher [42.0% (42/100) vs 26.3% (197/750)]. The percentage of dysmenorrhea patients with family history was higher [89.0% (89/100) vs 55.5% (416/750)]. The medians of dysmenorrhea score in patients with and without family history were 6 and 2, and the median durations of dysmenorrhea were 10 and 1 years. There were significant differences in age, marital status, percentage of dysmenorrhea, dysmenorrhea score and duration (all P<0.001). The median levels of serum cancer antigen (CA) 125 in patients with family history and patients without family history at the time of diagnosis were 57.5 and 46.9 kU/L respectively, with a statistically significant difference (P<0.05). However, there were no significant differences between the two groups in nationality, bady mass index, menarche age, menstrual cycle, menstrual period, menstrual volume, serum CA19-9 level, cyst location and size, stage, history of adverse pregnancy and childbirth, infertility, adenomyosis and deep infiltrating endometriosis (all P>0.05). By comparing the specific conditions of dysmenorrhea patients with and without family history of endometriosis, there were no significant differences between the two groups in terms of the age of onset of dysmenorrhea, duration of dysmenorrhea, primary and secondary dysmenorrhea, and progressive aggravation of dysmenorrhea (all P>0.05). The difference in the degree of dysmenorrhea in dysmenorrhea patients with family history of endometriosis was significant (P<0.001). Conclusions: The incidence of endometriosis has a familial tendency, and most of the involved relatives are the first degree relatives. Compared with patients without family history of endometriosis, endometriosis patients with family history are diagnosed at an earlier age, with higher percentage of dysmenorrhea, had more severe dysmenorrhea and higher serum CA125 level.
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Affiliation(s)
- J J Zhang
- Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
| | - H Y Guo
- Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
| | - C L Shang
- Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
| | - L Liu
- Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
| | - C Y Huang
- Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
| | - Z X Wu
- Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
| | - Y Li
- Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
| | - Y Wu
- Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
| | - H J Li
- Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
| | - H M Liang
- Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
| | - B Xu
- Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing 100191, China
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Smithers L, Degtjarik O, Weichert D, Huang CY, Boland C, Bowen K, Oluwole A, Lutomski C, Robinson CV, Scanlan EM, Wang M, Olieric V, Shalev-Benami M, Caffrey M. Structure snapshots reveal the mechanism of a bacterial membrane lipoprotein N-acyltransferase. Sci Adv 2023; 9:eadf5799. [PMID: 37390210 PMCID: PMC10313180 DOI: 10.1126/sciadv.adf5799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Accepted: 05/26/2023] [Indexed: 07/02/2023]
Abstract
Bacterial lipoproteins (BLPs) decorate the surface of membranes in the cell envelope. They function in membrane assembly and stability, as enzymes, and in transport. The final enzyme in the BLP synthesis pathway is the apolipoprotein N-acyltransferase, Lnt, which is proposed to act by a ping-pong mechanism. Here, we use x-ray crystallography and cryo-electron microscopy to chart the structural changes undergone during the progress of the enzyme through the reaction. We identify a single active site that has evolved to bind, individually and sequentially, substrates that satisfy structural and chemical criteria to position reactive parts next to the catalytic triad for reaction. This study validates the ping-pong mechanism, explains the molecular bases for Lnt's substrate promiscuity, and should facilitate the design of antibiotics with minimal off-target effects.
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Affiliation(s)
- Luke Smithers
- School of Medicine and School of Biochemistry and Immunology, Trinity College Dublin, Dublin D02 R590, Ireland
| | - Oksana Degtjarik
- Department of Chemical and Structural Biology, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Dietmar Weichert
- School of Medicine and School of Biochemistry and Immunology, Trinity College Dublin, Dublin D02 R590, Ireland
| | - Chia-Ying Huang
- Swiss Light Source, Paul Scherrer Institute, CH-5232 Villigen, Switzerland
| | - Coilín Boland
- School of Medicine and School of Biochemistry and Immunology, Trinity College Dublin, Dublin D02 R590, Ireland
| | - Katherine Bowen
- School of Chemistry, Trinity College Dublin, Dublin D02 R590, Ireland
| | - Abraham Oluwole
- Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
| | - Corinne Lutomski
- Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
| | - Carol V. Robinson
- Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QU, UK
| | - Eoin M. Scanlan
- School of Chemistry, Trinity College Dublin, Dublin D02 R590, Ireland
| | - Meitian Wang
- Swiss Light Source, Paul Scherrer Institute, CH-5232 Villigen, Switzerland
| | - Vincent Olieric
- Swiss Light Source, Paul Scherrer Institute, CH-5232 Villigen, Switzerland
| | - Moran Shalev-Benami
- Department of Chemical and Structural Biology, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Martin Caffrey
- School of Medicine and School of Biochemistry and Immunology, Trinity College Dublin, Dublin D02 R590, Ireland
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Nguyen HTV, Chen X, Parada C, Luo AC, Shih O, Jeng US, Huang CY, Shih YL, Ma C. Structure of the heterotrimeric membrane protein complex FtsB-FtsL-FtsQ of the bacterial divisome. Nat Commun 2023; 14:1903. [PMID: 37019934 PMCID: PMC10076392 DOI: 10.1038/s41467-023-37543-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Accepted: 03/21/2023] [Indexed: 04/07/2023] Open
Abstract
The synthesis of the cell-wall peptidoglycan during bacterial cell division is mediated by a multiprotein machine, called the divisome. The essential membrane protein complex of FtsB, FtsL and FtsQ (FtsBLQ) is at the heart of the divisome assembly cascade in Escherichia coli. This complex regulates the transglycosylation and transpeptidation activities of the FtsW-FtsI complex and PBP1b via coordination with FtsN, the trigger for the onset of constriction. Yet the underlying mechanism of FtsBLQ-mediated regulation is largely unknown. Here, we report the full-length structure of the heterotrimeric FtsBLQ complex, which reveals a V-shaped architecture in a tilted orientation. Such a conformation could be strengthened by the transmembrane and the coiled-coil domains of the FtsBL heterodimer, as well as an extended β-sheet of the C-terminal interaction site involving all three proteins. This trimeric structure may also facilitate interactions with other divisome proteins in an allosteric manner. These results lead us to propose a structure-based model that delineates the mechanism of the regulation of peptidoglycan synthases by the FtsBLQ complex.
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Affiliation(s)
- Hong Thuy Vy Nguyen
- Genomics Research Center, Academia Sinica, Taipei, 115, Taiwan
- Chemical Biology and Molecular Biophysics program, Taiwan International Graduate Program, Academia Sinica, Taipei, 115, Taiwan
- Institute of Biochemical Sciences, National Taiwan University, Taipei, 10617, Taiwan
| | - Xiaorui Chen
- Genomics Research Center, Academia Sinica, Taipei, 115, Taiwan
| | - Claudia Parada
- Institute of Biological Chemistry, Academia Sinica, Taipei, 115, Taiwan
| | - An-Chi Luo
- Institute of Biochemical Sciences, National Taiwan University, Taipei, 10617, Taiwan
- Institute of Biological Chemistry, Academia Sinica, Taipei, 115, Taiwan
| | - Orion Shih
- National Synchrotron Radiation Research Center, Hsinchu, 30076, Taiwan
| | - U-Ser Jeng
- National Synchrotron Radiation Research Center, Hsinchu, 30076, Taiwan
- Department of Chemical Engineering, National Tsing Hua University, Hsinchu, 30044, Taiwan
| | - Chia-Ying Huang
- Paul Scherrer Institute, Forschungsstrasse 111, Villigen-PSI, 5232, Switzerland
| | - Yu-Ling Shih
- Institute of Biochemical Sciences, National Taiwan University, Taipei, 10617, Taiwan.
- Institute of Biological Chemistry, Academia Sinica, Taipei, 115, Taiwan.
| | - Che Ma
- Genomics Research Center, Academia Sinica, Taipei, 115, Taiwan.
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Wang H, Mörman C, Sternke-Hoffmann R, Huang CY, Prota A, Ma P, Luo J. Cu 2+ ions modulate the interaction between α-synuclein and lipid membranes. J Inorg Biochem 2022; 236:111945. [PMID: 35952593 DOI: 10.1016/j.jinorgbio.2022.111945] [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: 04/08/2022] [Revised: 07/20/2022] [Accepted: 07/22/2022] [Indexed: 12/15/2022]
Abstract
α-synuclein protein aggregates are the major constituent of Lewy bodies, which is a main pathogenic hallmark of Parkinson's disease. Both lipid membranes and Cu2+ ions can bind to α-synuclein and modulate its aggregation propensity and toxicity. However, the synergistic effect of copper ions and lipid membranes on α-synuclein remains to be explored. Here, we investigate how Cu2+ and α-synuclein simultaneously influence the lipidic structure of lipidic cubic phase(LCP) matrix by using small-angle X-ray scattering. α-Syn proteins destabilize the cubic-Pn3m phase of LCP that can be further recovered after the addition of Cu2 ions even at a low stoichiometric ratio. By using circular dichroism and nuclear magnetic resonance, we also study how lipid membranes and Cu2+ ions impact the secondary structures of α-synuclein at an atomic level. Although the secondary structure of α-synuclein with lipid membranes is not significantly changed to a large extent in the presence of Cu2+ ions, lipid membranes promote the interaction between α-synuclein C-terminus and Cu2+ ions. The modulation of Cu2+ ions and lipid membranes on α-synuclein dynamics and structure may play an important role in the molecular pathogenesis of Parkinson's disease.
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Affiliation(s)
- Hongzhi Wang
- Department of Biology and Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - Cecilia Mörman
- Department of Biology and Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland; Department of Biosciences and Nutrition, Karolinska Institutet, 141 52 Huddinge, Sweden
| | | | - Chia-Ying Huang
- Swiss Light Source at Paul Scherrer Institut, Forschungstrasse 111, Villigen-PSI, Villigen 5232, Switzerland
| | - Andrea Prota
- Department of Biology and Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - Pikyee Ma
- Department of Biology and Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - Jinghui Luo
- Department of Biology and Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland.
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Huang CY, Aumonier S, Engilberge S, Eris D, Smith KML, Leonarski F, Wojdyla JA, Beale JH, Buntschu D, Pauluhn A, Sharpe ME, Metz A, Olieric V, Wang M. Probing ligand binding of endothiapepsin by `temperature-resolved' macromolecular crystallography. Acta Crystallogr D Struct Biol 2022; 78:964-974. [PMID: 35916221 PMCID: PMC9344481 DOI: 10.1107/s205979832200612x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 06/09/2022] [Indexed: 12/03/2022] Open
Abstract
A room-temperature X-ray crystallographic method using temperature as a trigger to record movie-like structural snapshots has been developed and applied to study ligand binding and protein plasticity. Continuous developments in cryogenic X-ray crystallography have provided most of our knowledge of 3D protein structures, which has recently been further augmented by revolutionary advances in cryoEM. However, a single structural conformation identified at cryogenic temperatures may introduce a fictitious structure as a result of cryogenic cooling artefacts, limiting the overview of inherent protein physiological dynamics, which play a critical role in the biological functions of proteins. Here, a room-temperature X-ray crystallographic method using temperature as a trigger to record movie-like structural snapshots has been developed. The method has been used to show how TL00150, a 175.15 Da fragment, undergoes binding-mode changes in endothiapepsin. A surprising fragment-binding discrepancy was observed between the cryo-cooled and physiological temperature structures, and multiple binding poses and their interplay with DMSO were captured. The observations here open up new promising prospects for structure determination and interpretation at physiological temperatures with implications for structure-based drug discovery.
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Chen YF, Zheng ZX, Huang CY, Guo BC, Tsou CH, Liang HC. Continuous wave dual-wavelength Nd:YVO 4 laser at 1342 and 1525 nm for generating a 714-nm emission. Opt Lett 2022; 47:3792-3795. [PMID: 35913316 DOI: 10.1364/ol.466231] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Accepted: 07/07/2022] [Indexed: 06/15/2023]
Abstract
Continuous wave dual-wavelength lasers at 1342 and 1525 nm are developed by using separate Nd:YVO4 and YVO4 crystals to form compactly coupled cavities for fundamental and Raman waves, respectively. The design of the coupled cavity not only reduces the thermal lensing effect in the Nd:YVO4 crystal, but also improves the stimulated Raman scattering (SRS) efficiency in the undoped YVO4 crystal. In addition, the Raman crystal is coated to form a highly reflective mirror to minimize cavity losses. By using a plano-concave cavity with a pump power of 40 W, the output powers of the fundamental and Raman waves are 470 mW and 310 mW, respectively. Changed to a concave cavity, the output powers of fundamental and Raman waves are 220 mW and 510 mW, respectively. Basis on the dual-wavelength operation, the maximum output power at 714 nm can reach 2.0 W via the sum frequency generation. A light source at 714 nm can be used for laser spectroscopy of atomic and ionic radium isotopes.
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Huang CY, Aumonier S, Engilberge S, Eris D, Smith K, Leonarski F, Wojdyla J, Beale J, Buntschu D, Pauluhn A, Sharpe M, Olieric V, Wang M. Probing ligand binding of endothiapepsin by 'temperature-resolved' macromolecular crystallography. Acta Crystallogr A Found Adv 2022. [DOI: 10.1107/s2053273322099454] [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: 11/11/2022] Open
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Chen S, Luo YC, Huang CY, Liang JY, Feng YH, Xu JX, Wu Z. [Application of Broadrick occlusal plane analyzer in the functional and esthetic rehabilitation of a patient with severe dental erosion]. Zhonghua Kou Qiang Yi Xue Za Zhi 2022; 57:749-752. [PMID: 35790516 DOI: 10.3760/cma.j.cn112144-20220107-00006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Affiliation(s)
- S Chen
- Department of Prosthodontics, Stomatology Hospital of Guangzhou Medical University & Guangzhou Institute of Oral Disease & Key Laboratory of Oral Medicine, Guangzhou 510140, China
| | - Y C Luo
- Department of Prosthodontics, Stomatology Hospital of Guangzhou Medical University & Guangzhou Institute of Oral Disease & Key Laboratory of Oral Medicine, Guangzhou 510140, China
| | - C Y Huang
- Department of Prosthodontics, Stomatology Hospital of Guangzhou Medical University & Guangzhou Institute of Oral Disease & Key Laboratory of Oral Medicine, Guangzhou 510140, China
| | - J Y Liang
- Department of Prosthodontics, Stomatology Hospital of Guangzhou Medical University & Guangzhou Institute of Oral Disease & Key Laboratory of Oral Medicine, Guangzhou 510140, China
| | - Y H Feng
- Department of Prosthodontics, Stomatology Hospital of Guangzhou Medical University & Guangzhou Institute of Oral Disease & Key Laboratory of Oral Medicine, Guangzhou 510140, China
| | - J X Xu
- Department of Prosthodontics, Stomatology Hospital of Guangzhou Medical University & Guangzhou Institute of Oral Disease & Key Laboratory of Oral Medicine, Guangzhou 510140, China
| | - Z Wu
- Department of Prosthodontics, Stomatology Hospital of Guangzhou Medical University & Guangzhou Institute of Oral Disease & Key Laboratory of Oral Medicine, Guangzhou 510140, China
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Peng SY, Huang CY, Zhu LM, Wu WY, Liu Y, Tan ZX, Ouyang H, Song H. [Clinical application of bipolar tweezers-clamp for hepatic parenchymal transection]. Zhonghua Wai Ke Za Zhi 2022; 60:449-453. [PMID: 35359086 DOI: 10.3760/cma.j.cn112139-20210629-00280] [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: 02/05/2023]
Abstract
Objective: To investigate the clinical value of the bipolar tweezers-clamp for the hepatic parenchymal transection in the resection of hepatocellular carcinoma. Methods: From January 2020 to January 2021,63 patients with the hepatocellular carcinoma for hepatectomy at Department of Hepatopancreatobiliary Surgery,Yuebei People's Hospital Affiliated to Shantou University Medical College were analyzed retrospectively.According to the different instruments used in the hepatic parenchymal transection,the patients were divided into bipolar tweezers-clamp group and ultrasonic scalpel group.There were 32 patients in bipolar tweezers-clamp group,with age of (55.5±10.5)years(range:37 to 78 years),including 22 males and 10 females,tumor size was (6.0±3.4)cm(range:2.4 to 13.4 cm). There were 6 patients with portal vein tumor thrombus and 5 patients with portal hypertension. There were 31 patients in ultrasonic scalpel group,with aged(57.8±10.1)years(range:37 to 79 years),including 27males and 4 females,tumor size was(7.9±5.1)cm(range: 2.4 to 21.3 cm),3 patients with portal vein tumor thrombus and 2 patients with portal hypertension. The preoperative baseline data,operation time,blood loss,postoperative liver function and the complications were compared between two groups using t test,χ2 test and Fisher exact probabilityrespectively. Results: The operation was successfully completed in both groups.Compared with the ultrasonic scalpel group,the operation time was significantly shorter((219.3±76.4)minutes vs.(294.0±100.8)minutes,t=-3.322,P=0.002),the blood loss was less((250(475)ml vs. 500(1 050)ml,t=-2.307,P=0.026),the concentrate red blood cells transfusion volume was less(0.92(0.88)U vs. 2.32(4.00)U,Z=-1.987,P=0.047) in the bipolar tweezers-clamp group.The postoperative serum ALB level was higher in the bipolar tweezers-clamp group than that in the ultrasonic scalpel group((33.5±6.1)g/L vs. (29.5±4.2)g/L,t=3.226,P=0.020) on postoperative day 1;((35.7±4.5)g/L vs.(30.1±3.2)g/L,t=5.575,P<0.01) on postoperative day 3;((33.2±3.7)g/L vs. (31.0±4.4)g/L,t=3.020,P=0.004) on postoperative day 7. There was no significant difference in serum ALT,TBIL and PT level between the two groups(all P>0.05).No postoperative bile leakage occurred in both groups.The postoperative complications occurred in 8 cases(25.0%)in the bipolar tweezers-clamp group,including liver failure in one,and in 11 cases(35.5%)in the ultrasonic scalpel group,including liver failure in two(P>0.05). Conclusion: The bipolar tweezers-clamp is a safe and reliable method for the hepatic parenchymal transaction,which is quick and less bleeding during the hepatic resection.
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Affiliation(s)
- S Y Peng
- Department of General Surgery,the Second Affiliate Hospital,Zhejiang University Medical School,Hangzhou 310009,China
| | - C Y Huang
- Department of Hepatobiliary Surgery,Yuebei People's Hospital Affiliated to Shantou University Medical College,Shaoguan 512026,China
| | - L M Zhu
- Department of Hepatobiliary Surgery,Yuebei People's Hospital Affiliated to Shantou University Medical College,Shaoguan 512026,China
| | - W Y Wu
- Department of Hepatobiliary Surgery,Yuebei People's Hospital Affiliated to Shantou University Medical College,Shaoguan 512026,China
| | - Y Liu
- Department of Hepatobiliary Surgery,Yuebei People's Hospital Affiliated to Shantou University Medical College,Shaoguan 512026,China
| | - Z X Tan
- Department of Hepatobiliary Surgery,Yuebei People's Hospital Affiliated to Shantou University Medical College,Shaoguan 512026,China
| | - H Ouyang
- Department of Hepatobiliary Surgery,Yuebei People's Hospital Affiliated to Shantou University Medical College,Shaoguan 512026,China
| | - Hao Song
- Department of Hepatobiliary Surgery,Yuebei People's Hospital Affiliated to Shantou University Medical College,Shaoguan 512026,China
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Huang CY, Liu YM, Liu H, Xu B, Yan HP, Zhang HP, Liao HY, Zhang XD, Zhao J, Li WJ, Duan ZP. [Study of clinical characteristics in patients with gp210 antibody-positive primary biliary cholangitis]. Zhonghua Gan Zang Bing Za Zhi 2022; 30:419-425. [PMID: 35545568 DOI: 10.3760/cma.j.cn501113-20210501-00216] [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] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To analyze the clinical characteristics and prognostic value of liver function in a large samples of patients with anti-glycoprotein 210 (gp210 antibody) positive primary biliary cholangitis (PBC). Methods: A retrospective study was performed on 931 PBC cases in Beijing You'an Hospital affiliated to Capital Medical University from 2010 to 2019. According to the detection of gp210 antibody, 318 cases were divided into gp210 antibody positive group (positive group) and 613 cases were divided into gp210 antibody negative group (negative group). The differences in demographic, medical history, clinical indicators, B-ultrasound and pathological indicators as well as the histopathological basis were compared between the two groups. SPSS 16.0 software was used for statistical analysis. Measurement data were analyzed by t-test or rank sum test, and enumeration data by χ2 test. Multivariate analysis was used for logistic test, and and survival analysis was used for prognosis. Results: The positive and the negative groups were compared. The ratio of male to female was significantly higher in positive than negative group (1:5.35 vs. 1:9.73, P<0.05), and the difference was statistically significant. The proportion of hormone use in history of past diagnosed and treated was higher in positive than negative group (12.9% vs. 3.47%, P<0.05), and the difference was statistically significant. The detection of biochemical indexes such as alanine aminotransferase (ALT), aspartate aminotransferase (AST), total bilirubin (TBIL), alkaline phosphatase (ALP), glutamyl transpeptidase (GGT) were higher in positive than the negative group (51.1 U/L vs. 41.1 U/L, 62.6 U/L vs. 49.6 U/L, 24.1 μmol/L vs. 17.9 μmol/L, 228.3 U/L vs. 169.6 U/L, 203.9 U/L vs. 147.6 U/L), (P<0.05), and the differences were statistically significant. Antinuclear antibody (ANA)-positive rate, high titer ratio and immunoglobulin G (IgG) levels were higher in positive than negative group (95.2% vs. 81.6%, 69.7% vs. 48.8%, 17.2 g/L vs. 16.2 g/L), (P<0.05), and the differences were statistically significant. The incidence of liver failure was higher in positive than negative group (P<0.05). CK7 and inflammation score were higher in positive group than negative group in liver histopathological observations (0.83±0.53 vs. 0.28±0.47; 1.06±0.39 vs. 0.54±0.65), (P<0.05), and the differences were statistically significant. Conclusion: The illness condition of patients with gp210 antibody positive PBC is more severe than patients with gp210 antibody negative PBC, and the incidence of liver failure is significantly increased. Cholangiocytes may be the histopathological basis of the clinical characteristics of gp210 antibody positive PBC patients.
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Affiliation(s)
- C Y Huang
- Department of Liver Disease Center, Beijing You'an Hospital Affiliated to Capital Medical University, Beijing 100069, China
| | - Y M Liu
- Department of Liver Disease Center, Beijing You'an Hospital Affiliated to Capital Medical University, Beijing 100069, China
| | - H Liu
- Department of Pathology, Beijing You'an Hospital Affiliated to Capital Medical University, Beijing 100069, China
| | - B Xu
- Department of Liver Disease Center, Beijing You'an Hospital Affiliated to Capital Medical University, Beijing 100069, China
| | - H P Yan
- Department of Liver Disease Center, Beijing You'an Hospital Affiliated to Capital Medical University, Beijing 100069, China Capital Medical University Department of Laboratory Medicine, Affiliated Beijing You'an Hospital, Beijing 100069, China
| | - H P Zhang
- Capital Medical University Department of Laboratory Medicine, Affiliated Beijing You'an Hospital, Beijing 100069, China
| | - H Y Liao
- Department of Liver Disease Center, Beijing You'an Hospital Affiliated to Capital Medical University, Beijing 100069, China
| | - X D Zhang
- Department of Liver Disease Center, Beijing You'an Hospital Affiliated to Capital Medical University, Beijing 100069, China
| | - J Zhao
- Department of Liver Disease Center, Beijing You'an Hospital Affiliated to Capital Medical University, Beijing 100069, China
| | - W J Li
- Department of Liver Disease Center, Beijing You'an Hospital Affiliated to Capital Medical University, Beijing 100069, China
| | - Z P Duan
- Department of Critical Hepatology, Beijing You'an Hospital Affiliated to Capital Medical University, Beijing 100069, China
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Kaminski JW, Vera L, Stegmann DP, Vering J, Eris D, Smith KML, Huang CY, Meier N, Steuber J, Wang M, Fritz G, Wojdyla JA, Sharpe ME. Fast fragment- and compound-screening pipeline at the Swiss Light Source. Acta Crystallogr D Struct Biol 2022; 78:328-336. [PMID: 35234147 PMCID: PMC8900825 DOI: 10.1107/s2059798322000705] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/03/2021] [Accepted: 01/19/2022] [Indexed: 11/10/2022]
Abstract
Over the last two decades, fragment-based drug discovery (FBDD) has emerged as an effective and efficient method to identify new chemical scaffolds for the development of lead compounds. X-ray crystallography can be used in FBDD as a tool to validate and develop fragments identified as binders by other methods. However, it is also often used with great success as a primary screening technique. In recent years, technological advances at macromolecular crystallography beamlines in terms of instrumentation, beam intensity and robotics have enabled the development of dedicated platforms at synchrotron sources for FBDD using X-ray crystallography. Here, the development of the Fast Fragment and Compound Screening (FFCS) platform, an integrated next-generation pipeline for crystal soaking, handling and data collection which allows crystallography-based screening of protein crystals against hundreds of fragments and compounds, at the Swiss Light Source is reported.
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14
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Zhang HP, Yan HP, Lou JL, Huang CY, Ma YX, Li LJ, Han Y, Liu YM. [Characteristics of clinical and laboratory indexes in patients with liver disease with positive anti-liver cytosol antibody]. Zhonghua Gan Zang Bing Za Zhi 2021; 29:1182-1187. [PMID: 35045634 DOI: 10.3760/cma.j.cn501113-20210106-00009] [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] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Objective: To analyze the characteristics of clinical and laboratory indexes in patients with liver disease with positive anti-liver cytosol antibody type 1 (anti-LC1), in order to provide references for clinical and differential diagnosis. Methods: The clinical data of 23 832 inpatients and outpatients with positive anti-LC1 autoantibodies detected in routine autoantibody test from January 2010 to January 2020 were retrospectively analyzed, and their clinical and laboratory indexes were compared. Western blotting was used to detect anti-LC1, anti-soluble liver antigen antibody (anti-SLA), anti-glycoprotein 210 antibodies and anti-nucleosome 100 antibodies. Indirect immunofluorescence assay was used to detect anti-nuclear antibody (ANA), anti-mitochondrial antibody, anti-Smooth muscle antibody (ASMA), anti-liver and kidney microsomal antibody (anti-LKM) and other autoantibodies. Normally distributed measurement data between the two groups were compared by independent-sample t-test, and the multiple groups comparison were compared by one-way analysis of variance. Non-normally distributed measurement data were compared by non-parametric rank sum test. Results: 38 anti-LC1 positive patients were detected in 23832 autoantibody tests. The age of initial diagnosis ranged from 11.0 to 84.0 (50.6 ± 16.0) years. There were 8 males (21.1%) and 30 females (78.9%). A total of 31 cases (81.6%) were positive for anti-LC1 and ANA, and the dominant karyotype was speckled pattern, accounting for 54.8%. Five cases (13.2%) were positive for ASMA, and no simultaneous positive with anti-LKM or anti-SLA. Among the 38 anti-LC1 positive patients, 9 were diagnosed with autoimmune hepatitis (AIH), 6 with possible AIH, 6 with primary biliary cholangitis (PBC), 8 with hepatitis B, 2 with hepatitis C, 1 with alcoholic liver disease, 2 with non-alcoholic fatty liver disease, 1 with drug-induced liver injury, 1 with hepatolenticular degeneration, and 2 with tumor. Confirmed and probable AIH cases accounted for 39.5% (15/38) of anti-LC1 positive cases. Among anti-LC1 positive patients, 47.4% (18/38) had entered the stage of liver cirrhosis. AIH group globulin level was higher than HBV group (P = 0.006) and other disease groups (P = 0.001). AIH group IgG level was higher than PBC group (P = 0.027), HBV group (P = 0.009) and other disease groups (P = 0.004). the of the PBC group IgM level was higher than AIH group (P = 0.003), HBV group (P = 0.003) and other disease groups (P = 0.006). Conclusion: Anti-LC1 is not only detected in AIH, but also observed in patients with primary biliary cholangitis, hepatitis B and C, alcoholic and non-alcoholic liver disease, drug-induced liver injury, hereditary metabolic liver disease and tumor. In addition, it is mainly female gender dominance and nearly half of ANA-positive young, middle-aged and elderly patients develop liver cirrhosis. For the diagnosis of type 2 autoimmune hepatitis, whether anti-LC1 is a specific antibody needs further research, but if AIH is highly suspected, this antibody can be used as a substitute.
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Affiliation(s)
- H P Zhang
- Center of Clinical Laboratory, Beijing You'an Hospital, Capital Medical University, Beijing 100069, China
| | - H P Yan
- Center of Clinical Laboratory, Beijing You'an Hospital, Capital Medical University, Beijing 100069, China
| | - J L Lou
- Center of Clinical Laboratory, Beijing You'an Hospital, Capital Medical University, Beijing 100069, China
| | - C Y Huang
- Second Department of Liver Disease Center, Beijing You'an Hospital, Capital Medical University, Beijing 100069, China
| | - Y X Ma
- Center of Clinical Laboratory, Beijing You'an Hospital, Capital Medical University, Beijing 100069, China
| | - L J Li
- Center of Clinical Laboratory, Beijing You'an Hospital, Capital Medical University, Beijing 100069, China
| | - Y Han
- Second Department of Liver Disease Center, Beijing You'an Hospital, Capital Medical University, Beijing 100069, China
| | - Y M Liu
- Second Department of Liver Disease Center, Beijing You'an Hospital, Capital Medical University, Beijing 100069, China
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Xu Q, Sun N, Xiao Q, Huang CY, Xu M, Zhang W, Li L, Wang Q, Olieric V, Wang W, He J, Sun B. The crystal structure of MreC provides insights into polymer formation. FEBS Open Bio 2021; 12:340-348. [PMID: 34510818 PMCID: PMC8804602 DOI: 10.1002/2211-5463.13296] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2021] [Revised: 09/01/2021] [Accepted: 09/10/2021] [Indexed: 11/06/2022] Open
Abstract
MreC is a scaffold protein required for cell shape determination through interactions with proteins related to cell wall synthesis. Here, we determined the crystal structure of the major periplasmic part of MreC from Escherichia coli at 2.1 Å resolution. The periplasmic part of MreC contains a coiled coil domain and two six-stranded barrel domains. The coiled coil domain is essential for dimer formation, and the two monomers are prone to relative motion that is related to the small interface of β-barrel domains. In addition, MreC forms an antiparallel filament-like structure along the coiled coil direction, which is different to the helical array structure in Pseudomonas aeruginosa. Our structure deepens our understanding of polymer formation of MreC.
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Affiliation(s)
- Qin Xu
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China.,University of Chinese Academy of Sciences, Beijing, 100049, China.,Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201204, China
| | - Ning Sun
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China.,Department of Microbiology, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Qingjie Xiao
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201204, China
| | - Chia-Ying Huang
- Swiss Light Source, Paul Scherrer Institute, Villigen-PSI, Switzerland
| | - Mengxue Xu
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China.,Department of Microbiology, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Weizhe Zhang
- Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201204, China
| | - Lina Li
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China.,Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201204, China
| | - Qisheng Wang
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China.,Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201204, China
| | - Vincent Olieric
- Swiss Light Source, Paul Scherrer Institute, Villigen-PSI, Switzerland
| | - Weiwu Wang
- Department of Microbiology, College of Life Sciences, Nanjing Agricultural University, Nanjing, 210095, China
| | - Jianhua He
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China
| | - Bo Sun
- Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai, 201800, China.,Shanghai Advanced Research Institute, Chinese Academy of Sciences, Shanghai, 201204, China
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Yang B, Tang KK, Geng H, Lam WW, Wong YS, Huang CY, Chiu TL, Kong CW, Cheung CW, Cheung KY, Yu SK. Comparison of modeling accuracy between Radixact ®and CyberKnife ®Synchrony ®respiratory tracking system. Biomed Phys Eng Express 2021; 7. [PMID: 34416743 DOI: 10.1088/2057-1976/ac1fa5] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 08/20/2021] [Indexed: 11/12/2022]
Abstract
Synchrony Respiratory Tracking system adapted from CyberKnife has been introduced in Radixact to compensate the tumor motion caused by respiration. This study aims to compare the modeling accuracy of the Synchrony system between Radixact and CyberKnife. Two Synchrony plans based on fiducial phantoms were created for CyberKnife and Radixact, respectively. Different respiratory motion traces were used to drive a motion platform to move along the superoinferior and left-right direction. The cycle time and the amplitude of target/surrogate motion of one selected motion trace were scaled to investigate the dependence of modeling accuracy on the motion characteristic. The predicted target position, the correlation error, potential difference (Radixact only) and standard error (CyberKnife only) were extracted from raw data or log files of the two systems. The modeling accuracy was evaluated by calculating the root-mean-square (RMS) error between the predicted target positions and the input motion trace. A threshold T95 within which 95% of the potential difference or the standard error lay was defined and evaluated. Except for the motion trace with a small amplitude and a good (linear) correlation between target and surrogate motion, Radixact showed smaller RMS errors than CyberKnife. The RMS error of both systems increased with the motion amplitude and showed a decreasing trend with the increasing cycle time. No correlation was found between the RMS error and the amplitude of surrogate motion. T95 could be a good estimator of modeling accuracy for CyberKnife rather than Radixact. The correlation error defined in Radixact were largely affected by the number of fiducial markers and the setup error. In general, the modeling accuracy of the Radixact Synchrony system is better than that of the CyberKnife Synchrony system under unfavorable conditions.
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Affiliation(s)
- B Yang
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - K K Tang
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - H Geng
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - W W Lam
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - Y S Wong
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - C Y Huang
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - T L Chiu
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - C W Kong
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - C W Cheung
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - K Y Cheung
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - S K Yu
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
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Martiel I, Beale JH, Karpik A, Huang CY, Vera L, Olieric N, Wranik M, Tsai CJ, Mühle J, Aurelius O, John J, Högbom M, Wang M, Marsh M, Padeste C. Versatile microporous polymer-based supports for serial macromolecular crystallography. Acta Crystallogr D Struct Biol 2021; 77:1153-1167. [PMID: 34473086 PMCID: PMC8411977 DOI: 10.1107/s2059798321007324] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Accepted: 07/15/2021] [Indexed: 11/10/2022] Open
Abstract
Serial data collection has emerged as a major tool for data collection at state-of-the-art light sources, such as microfocus beamlines at synchrotrons and X-ray free-electron lasers. Challenging targets, characterized by small crystal sizes, weak diffraction and stringent dose limits, benefit most from these methods. Here, the use of a thin support made of a polymer-based membrane for performing serial data collection or screening experiments is demonstrated. It is shown that these supports are suitable for a wide range of protein crystals suspended in liquids. The supports have also proved to be applicable to challenging cases such as membrane proteins growing in the sponge phase. The sample-deposition method is simple and robust, as well as flexible and adaptable to a variety of cases. It results in an optimally thin specimen providing low background while maintaining minute amounts of mother liquor around the crystals. The 2 × 2 mm area enables the deposition of up to several microlitres of liquid. Imaging and visualization of the crystals are straightforward on the highly transparent membrane. Thanks to their affordable fabrication, these supports have the potential to become an attractive option for serial experiments at synchrotrons and free-electron lasers.
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Affiliation(s)
- Isabelle Martiel
- Paul Scherrer Institute, Forschungsstrasse 111, 5232 Villigen, Switzerland
| | - John H. Beale
- Paul Scherrer Institute, Forschungsstrasse 111, 5232 Villigen, Switzerland
| | - Agnieszka Karpik
- Paul Scherrer Institute, Forschungsstrasse 111, 5232 Villigen, Switzerland
- Institute of Polymer Nanotechnology (INKA), FHNW University of Applied Sciences and Arts Northwestern Switzerland, 5210 Windisch, Switzerland
| | - Chia-Ying Huang
- Paul Scherrer Institute, Forschungsstrasse 111, 5232 Villigen, Switzerland
| | - Laura Vera
- Paul Scherrer Institute, Forschungsstrasse 111, 5232 Villigen, Switzerland
| | - Natacha Olieric
- Paul Scherrer Institute, Forschungsstrasse 111, 5232 Villigen, Switzerland
| | - Maximilian Wranik
- Paul Scherrer Institute, Forschungsstrasse 111, 5232 Villigen, Switzerland
| | - Ching-Ju Tsai
- Paul Scherrer Institute, Forschungsstrasse 111, 5232 Villigen, Switzerland
| | - Jonas Mühle
- Paul Scherrer Institute, Forschungsstrasse 111, 5232 Villigen, Switzerland
| | - Oskar Aurelius
- Department of Biochemistry and Biophysics, Stockholm University, 106 91 Stockholm, Sweden
- MAX IV Laboratory, Lund University, Fotongatan 2, 224 84 Lund, Sweden
| | - Juliane John
- Department of Biochemistry and Biophysics, Stockholm University, 106 91 Stockholm, Sweden
| | - Martin Högbom
- Department of Biochemistry and Biophysics, Stockholm University, 106 91 Stockholm, Sweden
| | - Meitian Wang
- Paul Scherrer Institute, Forschungsstrasse 111, 5232 Villigen, Switzerland
| | - May Marsh
- Paul Scherrer Institute, Forschungsstrasse 111, 5232 Villigen, Switzerland
| | - Celestino Padeste
- Paul Scherrer Institute, Forschungsstrasse 111, 5232 Villigen, Switzerland
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McAuley KE, Huang CY, Kaminski J, Meier NA, Panepucci E, Sharpe ME, Smith KML, Vera LFSA, Wojdyla JA. Automated data collection on the Swiss Light Source macromolecular crystallography beamlines. Acta Crystallogr A Found Adv 2021. [DOI: 10.1107/s0108767321095362] [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: 11/11/2022] Open
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19
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Engilberge S, Lemaire O, Mueller MC, Leonarski F, Huang CY, Tomizaki T, Matsugaki N, Royant A, Olieric V, Wang M, Wagner T. The crystallomics pipeline, a shotgun approach on native proteomes to (re)discover the unsuspected. Acta Crystallogr A Found Adv 2021. [DOI: 10.1107/s0108767321093867] [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: 11/11/2022] Open
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20
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Olatunji S, Bowen K, Huang CY, Weichert D, Singh W, Tikhonova IG, Scanlan EM, Olieric V, Caffrey M. Structural basis of the membrane intramolecular transacylase reaction responsible for lyso-form lipoprotein synthesis. Nat Commun 2021; 12:4254. [PMID: 34253723 PMCID: PMC8275575 DOI: 10.1038/s41467-021-24475-0] [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] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 06/08/2021] [Indexed: 11/08/2022] Open
Abstract
Lipoproteins serve diverse functions in the bacterial cell and some are essential for survival. Some lipoproteins are adjuvants eliciting responses from the innate immune system of the host. The growing list of membrane enzymes responsible for lipoprotein synthesis includes the recently discovered lipoprotein intramolecular transacylase, Lit. Lit creates a lipoprotein that is less immunogenic, possibly enabling the bacteria to gain a foothold in the host by stealth. Here, we report the crystal structure of the Lit enzyme from Bacillus cereus and describe its mechanism of action. Lit consists of four transmembrane helices with an extracellular cap. Conserved residues map to the cap-membrane interface. They include two catalytic histidines that function to effect unimolecular transacylation. The reaction involves acyl transfer from the sn-2 position of the glyceryl moiety to the amino group on the N-terminal cysteine of the substrate via an 8-membered ring intermediate. Transacylation takes place in a confined aromatic residue-rich environment that likely evolved to bring distant moieties on the substrate into proximity and proper orientation for catalysis.
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Affiliation(s)
- Samir Olatunji
- Membrane Structural and Functional Biology Group, School of Medicine and School of Biochemistry and Immunology, Trinity College Dublin, Dublin, Ireland
| | - Katherine Bowen
- School of Chemistry, Trinity College Dublin, Dublin, Ireland
| | - Chia-Ying Huang
- Swiss Light Source, Paul Scherrer Institute, Villigen, Switzerland
| | - Dietmar Weichert
- Membrane Structural and Functional Biology Group, School of Medicine and School of Biochemistry and Immunology, Trinity College Dublin, Dublin, Ireland
| | - Warispreet Singh
- School of Pharmacy, Queen's University Belfast, Belfast, United Kingdom
- Faculty of Health and Life Sciences, Northumbria University, Newcastle upon Tyne, United Kingdom
- Hub for Biotechnology in Build Environment, Newcastle upon Tyne, United Kingdom
| | - Irina G Tikhonova
- School of Pharmacy, Queen's University Belfast, Belfast, United Kingdom
| | - Eoin M Scanlan
- School of Chemistry, Trinity College Dublin, Dublin, Ireland
| | - Vincent Olieric
- Swiss Light Source, Paul Scherrer Institute, Villigen, Switzerland
| | - Martin Caffrey
- Membrane Structural and Functional Biology Group, School of Medicine and School of Biochemistry and Immunology, Trinity College Dublin, Dublin, Ireland.
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Chiang CJ, Chao YP, Ali A, Day CH, Ho TJ, Wang PN, Lin SC, Padma VV, Kuo WW, Huang CY. Probiotic Escherichia coli Nissle inhibits IL-6 and MAPK-mediated cardiac hypertrophy during STZ-induced diabetes in rats. Benef Microbes 2021; 12:283-293. [PMID: 34030609 DOI: 10.3920/bm2020.0094] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Escherichia coli Nissle (EcN), a probiotic bacterium protects against several disorders. Multiple reports have studied the pathways involved in cardiac hypertrophy. However, the effects of probiotic EcN against diabetes-induced cardiac hypertrophy remain to be understood. We administered five weeks old Wistar male (271±19.4 g body weight) streptozotocin-induced diabetic rats with 109 cfu of EcN via oral gavage every day for 24 days followed by subjecting the rats to echocardiography to analyse the cardiac parameters. Overexpressed interleukin (IL)-6 induced the MEK5/ERK5, JAK2/STAT3, and MAPK signalling cascades in streptozotocin-induced diabetic rats. Further, the upregulation of calcineurin, NFATc3, and p-GATA4 led to the elevation of hypertrophy markers, such as atrial and B-type natriuretic peptides. In contrast, diabetic rats supplemented with probiotic EcN exhibited significant downregulated IL-6. Moreover, the MEK5/ERK5 and JAK2/STAT3 cascades involved during eccentric hypertrophy and MAPK signalling, including phosphorylated MEK, ERK, JNK, and p-38, were significantly attenuated in diabetic rats after supplementation of EcN. Western blotting and immunofluorescence revealed the significant downregulation of NFATc3 and downstream mediators, thereby resulting in the impairment of cardiac hypertrophy. Taken together, the findings demonstrate that supplementing probiotic EcN has the potential to show cardioprotective effects by inhibiting diabetes-induced cardiomyopathies.
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Affiliation(s)
- C J Chiang
- Department of Medical Laboratory Science and Biotechnology, China Medical University, 91 Hsueh-Shih Rd., Taichung 40402, Taiwan
| | - Y P Chao
- Department of Chemical Engineering, Feng Chia University, No. 100 Wenhwa Rd., Seatwen, Taichung 40724, Taiwan
| | - A Ali
- Department of Biological Science and Technology, China Medical University, 91 Hsueh-Shih Rd., Taichung 40402, Taiwan
| | - C H Day
- Department of Nursing, MeiHo University, 23, Pingguang Rd., Neipu, Pingtung 912, Taiwan
| | - T J Ho
- Department of Chinese Medicine, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Tzu Chi University, 707 Section 3 Chung-Yang Road, Hualien 97002, Taiwan.,Integration Center of Traditional Chinese and Modern Medicine, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien 97002, Taiwan.,School of Post-Baccalaureate Chinese Medicine, College of Medicine, Tzu Chi University, 701 Jhongyang Road Section 3, Hualien 97004, Taiwan
| | - P N Wang
- Department of Chemical Engineering, Feng Chia University, No. 100 Wenhwa Rd., Seatwen, Taichung 40724, Taiwan
| | - S C Lin
- Department of Medical Laboratory Science and Biotechnology, China Medical University, 91 Hsueh-Shih Rd., Taichung 40402, Taiwan
| | - V V Padma
- Department of Biotechnology, Bharathiar University, Coimbatore, India
| | - W W Kuo
- Department of Biological Science and Technology, China Medical University, 91 Hsueh-Shih Rd., Taichung 40402, Taiwan.,Ph.D. Program for Biotechnology Industry, China Medical University, Taichung 406, Taiwan
| | - C Y Huang
- Cardiovascular and Mitochondrial Related Disease Research Center, Hualien Tzu Chi Hospital, Buddhist Tzu Chi Medical Foundation, Hualien 97002, Taiwan.,Graduate Institute of Biomedical Sciences, China Medical University, Taichung 404, Taiwan.,Department of Medical Research, China Medical University Hospital, China Medical University, 91 Hsueh-Shih Rd., Taichung 40402, Taiwan.,Department of Biotechnology, Asia University, 500 Liufeng Rd., Wufeng, 41354 Taichung, Taiwan.,Center of General Education, Buddhist Tzu Chi Medical Foundation, Tzu Chi University of Science and Technology, Hualien 970, Taiwan
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22
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Li H, Huang CY, Govorunova EG, Sineshchekov OA, Yi A, Rothschild KJ, Wang M, Zheng L, Spudich JL. The crystal structure of bromide-bound GtACR1 reveals a pre-activated state in the transmembrane anion tunnel. eLife 2021; 10:65903. [PMID: 33998458 PMCID: PMC8172240 DOI: 10.7554/elife.65903] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Accepted: 05/16/2021] [Indexed: 12/16/2022] Open
Abstract
The crystal structure of the light-gated anion channel GtACR1 reported in our previous Research Article (Li et al., 2019) revealed a continuous tunnel traversing the protein from extracellular to intracellular pores. We proposed the tunnel as the conductance channel closed by three constrictions: C1 in the extracellular half, mid-membrane C2 containing the photoactive site, and C3 on the cytoplasmic side. Reported here, the crystal structure of bromide-bound GtACR1 reveals structural changes that relax the C1 and C3 constrictions, including a novel salt-bridge switch mechanism involving C1 and the photoactive site. These findings indicate that substrate binding induces a transition from an inactivated state to a pre-activated state in the dark that facilitates channel opening by reducing free energy in the tunnel constrictions. The results provide direct evidence that the tunnel is the closed form of the channel of GtACR1 and shed light on the light-gated channel activation mechanism.
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Affiliation(s)
- Hai Li
- Department of Biochemistry and Molecular Biology, Center for Membrane Biology, University of Texas Health Science Center - McGovern Medical School, Houston, United States
| | - Chia-Ying Huang
- Swiss Light Source, Paul Scherrer Institute, Villigen, Switzerland
| | - Elena G Govorunova
- Department of Biochemistry and Molecular Biology, Center for Membrane Biology, University of Texas Health Science Center - McGovern Medical School, Houston, United States
| | - Oleg A Sineshchekov
- Department of Biochemistry and Molecular Biology, Center for Membrane Biology, University of Texas Health Science Center - McGovern Medical School, Houston, United States
| | - Adrian Yi
- Molecular Biophysics Laboratory, Photonics Center and Department of Physics, Boston University, Boston, United States
| | - Kenneth J Rothschild
- Molecular Biophysics Laboratory, Photonics Center and Department of Physics, Boston University, Boston, United States
| | - Meitian Wang
- Swiss Light Source, Paul Scherrer Institute, Villigen, Switzerland
| | - Lei Zheng
- Department of Biochemistry and Molecular Biology, Center for Membrane Biology, University of Texas Health Science Center - McGovern Medical School, Houston, United States
| | - John L Spudich
- Department of Biochemistry and Molecular Biology, Center for Membrane Biology, University of Texas Health Science Center - McGovern Medical School, Houston, United States
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23
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Yang B, Wong YS, Lam WW, Geng H, Huang CY, Tang KK, Law WK, Ho CC, Nam PH, Cheung KY, Yu SK. Initial clinical experience of patient-specific QA of treatment delivery in online adaptive radiotherapy using a 1.5 T MR-Linac. Biomed Phys Eng Express 2021; 7. [PMID: 33882471 DOI: 10.1088/2057-1976/abfa80] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 04/21/2021] [Indexed: 11/11/2022]
Abstract
Purpose. This study aims to evaluate the performance of a commercial 1.5 T MR-Linac by analyzing its patient-specific quality assurance (QA) data collected during one full year of clinical operation.Methods and Materials. The patient-specific QA system consisted of offline delivery QA (DQA) and online calculation-based QA. Offline DQA was based on ArcCHECK-MR combined with an ionization chamber. Online QA was performed using RadCalc that calculated and compared the point dose calculation with the treatment planning system (TPS). A total of 24 patients with 189 treatment fractions were enrolled in this study. Gamma analysis was performed and the threshold that encompassed 95% of QA results (T95) was reported. The plan complexity metric was calculated for each plan and compared with the dose measurements to determine whether any correlation existed.Results. All point dose measurements were within 5% deviation. The mean gamma passing rates of the group data were found to be 96.8 ± 4.0% and 99.6 ± 0.7% with criteria of 2%/2mm and 3%/3mm, respectively. T95 of 87.4% and 98.2% was reported for the overall group with the two passing criteria, respectively. No statistically significant difference was found between adaptive treatments with adapt-to-position (ATP) and adapt-to-shape (ATS), whilst the category of pelvis data showed a better passing rate than other sites. Online QA gave a mean deviation of 0.2 ± 2.2%. The plan complexity metric was positively correlated with the mean dose difference whilst the complexity of the ATS cohort had larger variations than the ATP cohort.Conclusions. A patient-specific QA system based on ArcCHECK-MR, solid phantom and ionization chamber has been well established and implemented for validation of treatment delivery of a 1.5 T MR-Linac. Our QA data obtained over one year confirms that good agreement between TPS calculation and treatment delivery was achieved.
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Affiliation(s)
- B Yang
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - Y S Wong
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - W W Lam
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - H Geng
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - C Y Huang
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - K K Tang
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - W K Law
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - C C Ho
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - P H Nam
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - K Y Cheung
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
| | - S K Yu
- Medical Physics and Research Department, Hong Kong Sanatorium & Hospital, 2 Village Road, Happy Valley, Hong Kong
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24
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Huang CY, Li MY, Liu W, Li XX, Xu Y, Li JY, Yao QQ, Wang LM. Performance of prognostic nomogram in predicting long-term survival outcomes for osteosarcoma. J BIOL REG HOMEOS AG 2020; 34:1819-1824. [PMID: 33146004 DOI: 10.23812/20-105-l] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- C Y Huang
- Department of Orthopaedic Surgery, Nanjing First Hospital, Nanjing Medical University, China
| | - M Y Li
- Department of Cancer Recovery, Taikang Hospital, China
| | - W Liu
- Department of Orthopaedic Surgery, Affiliated Jiangsu Province Hospital of Nanjing Medical University, China
| | - X X Li
- Department of Orthopaedic Surgery, Nanjing First Hospital, Nanjing Medical University, China
| | - Y Xu
- Department of Orthopaedic Surgery, Nanjing First Hospital, Nanjing Medical University, China
| | - J Y Li
- Department of Orthopaedic Surgery, Nanjing First Hospital, Nanjing Medical University, China
| | - Q Q Yao
- Department of Orthopaedic Surgery, Nanjing First Hospital, Nanjing Medical University, China
| | - L M Wang
- Department of Orthopaedic Surgery, Nanjing First Hospital, Nanjing Medical University, China
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25
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Martiel I, Huang CY, Villanueva-Perez P, Panepucci E, Basu S, Caffrey M, Pedrini B, Bunk O, Stampanoni M, Wang M. Low-dose in situ prelocation of protein microcrystals by 2D X-ray phase-contrast imaging for serial crystallography. IUCrJ 2020; 7:1131-1141. [PMID: 33209324 PMCID: PMC7642777 DOI: 10.1107/s2052252520013238] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 10/01/2020] [Indexed: 06/11/2023]
Abstract
Serial protein crystallography has emerged as a powerful method of data collection on small crystals from challenging targets, such as membrane proteins. Multiple microcrystals need to be located on large and often flat mounts while exposing them to an X-ray dose that is as low as possible. A crystal-prelocation method is demonstrated here using low-dose 2D full-field propagation-based X-ray phase-contrast imaging at the X-ray imaging beamline TOMCAT at the Swiss Light Source (SLS). This imaging step provides microcrystal coordinates for automated serial data collection at a microfocus macromolecular crystallography beamline on samples with an essentially flat geometry. This prelocation method was applied to microcrystals of a soluble protein and a membrane protein, grown in a commonly used double-sandwich in situ crystallization plate. The inner sandwiches of thin plastic film enclosing the microcrystals in lipid cubic phase were flash cooled and imaged at TOMCAT. Based on the obtained crystal coordinates, both still and rotation wedge serial data were collected automatically at the SLS PXI beamline, yielding in both cases a high indexing rate. This workflow can be easily implemented at many synchrotron facilities using existing equipment, or potentially integrated as an online technique in the next-generation macromolecular crystallography beamline, and thus benefit a number of dose-sensitive challenging protein targets.
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Affiliation(s)
- Isabelle Martiel
- Paul Scherrer Institute, Forschungsstrasse 111, Villigen, 5232, Switzerland
| | - Chia-Ying Huang
- Paul Scherrer Institute, Forschungsstrasse 111, Villigen, 5232, Switzerland
| | - Pablo Villanueva-Perez
- Paul Scherrer Institute, Forschungsstrasse 111, Villigen, 5232, Switzerland
- Synchrotron Radiation Research and NanoLund, Lund University, Box 118, Lund, 221 00, Sweden
| | - Ezequiel Panepucci
- Paul Scherrer Institute, Forschungsstrasse 111, Villigen, 5232, Switzerland
| | - Shibom Basu
- Paul Scherrer Institute, Forschungsstrasse 111, Villigen, 5232, Switzerland
- EMBL Grenoble, 71 avenue des Martyrs, Grenoble, 38042, France
| | - Martin Caffrey
- School of Medicine and School of Biochemistry and Immunology, Trinity College, Dublin 2, D02 R590, Ireland
| | - Bill Pedrini
- Paul Scherrer Institute, Forschungsstrasse 111, Villigen, 5232, Switzerland
| | - Oliver Bunk
- Paul Scherrer Institute, Forschungsstrasse 111, Villigen, 5232, Switzerland
| | - Marco Stampanoni
- Paul Scherrer Institute, Forschungsstrasse 111, Villigen, 5232, Switzerland
- Institute of Biomedical Engineering, University and ETH Zurich, Zurich, 8092, Switzerland
| | - Meitian Wang
- Paul Scherrer Institute, Forschungsstrasse 111, Villigen, 5232, Switzerland
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26
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Iyaswamy A, Krishnamoorthi SK, Liu YW, Song JX, Kammala AK, Sreenivasmurthy SG, Malampati S, Tong BCK, Selvarasu K, Cheung KH, Lu JH, Tan JQ, Huang CY, Durairajan SSK, Li M. Yuan-Hu Zhi Tong Prescription Mitigates Tau Pathology and Alleviates Memory Deficiency in the Preclinical Models of Alzheimer's Disease. Front Pharmacol 2020; 11:584770. [PMID: 33192524 PMCID: PMC7663173 DOI: 10.3389/fphar.2020.584770] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Accepted: 09/25/2020] [Indexed: 12/26/2022] Open
Abstract
Alzheimer's disease (AD) is characterized by memory dysfunction, Aβ plaques together with phosphorylated tau-associated neurofibrillary tangles. Unfortunately, the present existing drugs for AD only offer mild symptomatic cure and have more side effects. As such, developments of effective, nontoxic drugs are immediately required for AD therapy. Present study demonstrates a novel role of Chinese medicine prescription Yuan-Hu Zhi Tong (YZT) in treating AD, and it has substantiated the in vivo effectiveness of YZT in two different transgenic mice models of AD, namely P301S tau and 3XTg-AD mice. Oral treatment of YZT significantly ameliorates motor dysfunction as well as promotes the clearance of aggregated tau in P301S tau mice. YZT improves the cognitive function and reduces the insoluble tau aggregates in 3XTg-AD mice model. Furthermore, YZT decreases the insoluble AT8 positive neuron load in both P301S tau and 3XTg-AD mice. Using microarray and the "Connectivity Map" analysis, we determined the YZT-induced changes in expression of signaling molecules and revealed the potential mechanism of action of YZT. YZT might regulate ubiquitin proteasomal system for the degradation of tau aggregates. The research results show that YZT is a potential drug candidate for the therapy of tau pathogenesis and memory decline in AD.
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Affiliation(s)
- A Iyaswamy
- Mr. & Mrs. Ko Chi-Ming Centre for Parkinson's Disease Research, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, China
| | - S K Krishnamoorthi
- Mr. & Mrs. Ko Chi-Ming Centre for Parkinson's Disease Research, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, China
| | - Y W Liu
- Institute of Biopharmaceutical Sciences, National Yang Ming University, Taipei, Taiwan
| | - J X Song
- Mr. & Mrs. Ko Chi-Ming Centre for Parkinson's Disease Research, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, China.,Medical College of Acupuncture-Moxibustion and Rehabilitation, Guangzhou University of Chinese Medicine, Guangzhou, China
| | - A K Kammala
- Mr. & Mrs. Ko Chi-Ming Centre for Parkinson's Disease Research, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, China
| | - S G Sreenivasmurthy
- Mr. & Mrs. Ko Chi-Ming Centre for Parkinson's Disease Research, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, China
| | - S Malampati
- Mr. & Mrs. Ko Chi-Ming Centre for Parkinson's Disease Research, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, China
| | - B C K Tong
- Mr. & Mrs. Ko Chi-Ming Centre for Parkinson's Disease Research, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, China
| | - K Selvarasu
- Division of Mycobiology and Neurodegenerative Disease Research, Department of Microbiology, School of Life Sciences, Central University of Tamil Nadu, Tiruvarur, India
| | - K H Cheung
- Mr. & Mrs. Ko Chi-Ming Centre for Parkinson's Disease Research, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, China
| | - J H Lu
- State Key Lab of Quality Research in Chinese Medicine, University of Macau, Macao SAR, China
| | - J Q Tan
- Center for Medical Genetics, School of Life Sciences, Central South University, Changsha, China
| | - C Y Huang
- Institute of Biopharmaceutical Sciences, National Yang Ming University, Taipei, Taiwan
| | - S S K Durairajan
- Mr. & Mrs. Ko Chi-Ming Centre for Parkinson's Disease Research, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, China.,Division of Mycobiology and Neurodegenerative Disease Research, Department of Microbiology, School of Life Sciences, Central University of Tamil Nadu, Tiruvarur, India
| | - M Li
- Mr. & Mrs. Ko Chi-Ming Centre for Parkinson's Disease Research, School of Chinese Medicine, Hong Kong Baptist University, Hong Kong SAR, China
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27
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Huang CY, Meier N, Caffrey M, Wang M, Olieric V. 3D-printed holders for in meso in situ fixed-target serial X-ray crystallography. J Appl Crystallogr 2020; 53:854-859. [PMID: 32684901 PMCID: PMC7312129 DOI: 10.1107/s1600576720002897] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2019] [Accepted: 03/01/2020] [Indexed: 11/10/2022] Open
Abstract
The in meso in situ serial X-ray crystallography method was developed to ease the handling of small fragile crystals of membrane proteins and for rapid data collection on hundreds of microcrystals directly in the growth medium without the need for crystal harvesting. To facilitate mounting of these in situ samples on a goniometer at cryogenic or at room temperatures, two new 3D-printed holders have been developed. They provide for cubic and sponge phase sample stability in the X-ray beam and are compatible with sample-changing robots. The holders can accommodate a variety of window material types, as well as bespoke samples for diffraction screening and data collection at conventional macromolecular crystallography beamlines. They can be used for convenient post-crystallization treatments such as ligand and heavy-atom soaking. The design, assembly and application of the holders for in situ serial crystallography are described. Files for making the holders using a 3D printer are included as supporting information.
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Affiliation(s)
- Chia-Ying Huang
- Paul Scherrer Institute, Forschungsstrasse 111, Villigen-PSI, 5232, Switzerland
| | - Nathalie Meier
- Paul Scherrer Institute, Forschungsstrasse 111, Villigen-PSI, 5232, Switzerland
| | - Martin Caffrey
- Membrane Structural and Functional Biology Group, Trinity Biomedical Sciences Institute, Trinity College, Dublin 2, D02 R590, Ireland
| | - Meitian Wang
- Paul Scherrer Institute, Forschungsstrasse 111, Villigen-PSI, 5232, Switzerland
| | - Vincent Olieric
- Paul Scherrer Institute, Forschungsstrasse 111, Villigen-PSI, 5232, Switzerland
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28
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Jaeger K, Bruenle S, Weinert T, Guba W, Muehle J, Miyazaki T, Weber M, Furrer A, Haenggi N, Tetaz T, Huang CY, Mattle D, Vonach JM, Gast A, Kuglstatter A, Rudolph MG, Nogly P, Benz J, Dawson RJP, Standfuss J. Structural Basis for Allosteric Ligand Recognition in the Human CC Chemokine Receptor 7. Cell 2020; 178:1222-1230.e10. [PMID: 31442409 PMCID: PMC6709783 DOI: 10.1016/j.cell.2019.07.028] [Citation(s) in RCA: 72] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 06/19/2019] [Accepted: 07/12/2019] [Indexed: 11/15/2022]
Abstract
The CC chemokine receptor 7 (CCR7) balances immunity and tolerance by homeostatic trafficking of immune cells. In cancer, CCR7-mediated trafficking leads to lymph node metastasis, suggesting the receptor as a promising therapeutic target. Here, we present the crystal structure of human CCR7 fused to the protein Sialidase NanA by using data up to 2.1 Å resolution. The structure shows the ligand Cmp2105 bound to an intracellular allosteric binding pocket. A sulfonamide group, characteristic for various chemokine receptor ligands, binds to a patch of conserved residues in the Gi protein binding region between transmembrane helix 7 and helix 8. We demonstrate how structural data can be used in combination with a compound repository and automated thermal stability screening to identify and modulate allosteric chemokine receptor antagonists. We detect both novel (CS-1 and CS-2) and clinically relevant (CXCR1-CXCR2 phase-II antagonist Navarixin) CCR7 modulators with implications for multi-target strategies against cancer.
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Affiliation(s)
- Kathrin Jaeger
- Laboratory of Biomolecular Research, Department of Biology and Chemistry, Paul Scherrer Institute, Villigen PSI
| | - Steffen Bruenle
- Laboratory of Biomolecular Research, Department of Biology and Chemistry, Paul Scherrer Institute, Villigen PSI
| | - Tobias Weinert
- Laboratory of Biomolecular Research, Department of Biology and Chemistry, Paul Scherrer Institute, Villigen PSI
| | - Wolfgang Guba
- Roche Pharma Research and Early Development, Therapeutic Modalities, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, 4070 Basel, Switzerland
| | - Jonas Muehle
- Laboratory of Biomolecular Research, Department of Biology and Chemistry, Paul Scherrer Institute, Villigen PSI; Roche Pharma Research and Early Development, Therapeutic Modalities, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, 4070 Basel, Switzerland
| | - Takuya Miyazaki
- Roche Pharma Research and Early Development, Therapeutic Modalities, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, 4070 Basel, Switzerland; Chugai Pharmaceutical Co., Ltd., Research Division, Kamakura Research Labs, Kamakura, Kanagawa, Japan
| | - Martin Weber
- Roche Pharma Research and Early Development, Therapeutic Modalities, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, 4070 Basel, Switzerland
| | - Antonia Furrer
- Laboratory of Biomolecular Research, Department of Biology and Chemistry, Paul Scherrer Institute, Villigen PSI
| | - Noemi Haenggi
- Roche Pharma Research and Early Development, Therapeutic Modalities, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, 4070 Basel, Switzerland
| | - Tim Tetaz
- Roche Pharma Research and Early Development, Therapeutic Modalities, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, 4070 Basel, Switzerland
| | - Chia-Ying Huang
- Macromolecular Crystallography, Swiss Light Source, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland
| | - Daniel Mattle
- Laboratory of Biomolecular Research, Department of Biology and Chemistry, Paul Scherrer Institute, Villigen PSI; Roche Pharma Research and Early Development, Therapeutic Modalities, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, 4070 Basel, Switzerland
| | - Jean-Marie Vonach
- Roche Pharma Research and Early Development, Therapeutic Modalities, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, 4070 Basel, Switzerland
| | - Alain Gast
- Roche Pharma Research and Early Development, Therapeutic Modalities, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, 4070 Basel, Switzerland
| | - Andreas Kuglstatter
- Roche Pharma Research and Early Development, Therapeutic Modalities, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, 4070 Basel, Switzerland
| | - Markus G Rudolph
- Roche Pharma Research and Early Development, Therapeutic Modalities, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, 4070 Basel, Switzerland
| | - Przemyslaw Nogly
- Laboratory of Biomolecular Research, Department of Biology and Chemistry, Paul Scherrer Institute, Villigen PSI
| | - Joerg Benz
- Roche Pharma Research and Early Development, Therapeutic Modalities, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, 4070 Basel, Switzerland
| | - Roger J P Dawson
- Roche Pharma Research and Early Development, Therapeutic Modalities, Roche Innovation Center Basel, F. Hoffmann-La Roche Ltd, 4070 Basel, Switzerland.
| | - Joerg Standfuss
- Laboratory of Biomolecular Research, Department of Biology and Chemistry, Paul Scherrer Institute, Villigen PSI.
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29
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Crack JC, Amara P, Volbeda A, Mouesca JM, Rohac R, Pellicer Martinez MT, Huang CY, Gigarel O, Rinaldi C, Le Brun NE, Fontecilla-Camps JC. Electron and Proton Transfers Modulate DNA Binding by the Transcription Regulator RsrR. J Am Chem Soc 2020; 142:5104-5116. [PMID: 32078310 DOI: 10.1021/jacs.9b12250] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The [Fe2S2]-RsrR gene transcription regulator senses the redox status in bacteria by modulating DNA binding, while its cluster cycles between +1 and +2 states-only the latter binds DNA. We have previously shown that RsrR can undergo remarkable conformational changes involving a 100° rotation of tryptophan 9 between exposed (Out) and buried (In) states. Here, we have used the chemical modification of Trp9, site-directed mutagenesis, and crystallographic and computational chemical studies to show that (i) the Out and In states correspond to oxidized and reduced RsrR, respectively, (ii) His33 is protonated in the In state due to a change in its pKa caused by cluster reduction, and (iii) Trp9 rotation is conditioned by the response of its dipole moment to environmental electrostatic changes. Our findings illustrate a novel function of protonation resulting from electron transfer.
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Affiliation(s)
- Jason C Crack
- Centre for Molecular and Structural Biochemistry, School of Chemistry, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, U.K
| | - Patricia Amara
- Université Grenoble Alpes, CEA, CNRS, Institut de Biologie Structurale, Metalloproteins Unit, F-38044 Grenoble, France
| | - Anne Volbeda
- Université Grenoble Alpes, CEA, CNRS, Institut de Biologie Structurale, Metalloproteins Unit, F-38044 Grenoble, France
| | - Jean-Marie Mouesca
- Université Grenoble Alpes, CEA, CNRS, IRIG-DIESE-SyMMES-CAMPE, 38000 Grenoble, France
| | - Roman Rohac
- Université Grenoble Alpes, CEA, CNRS, Institut de Biologie Structurale, Metalloproteins Unit, F-38044 Grenoble, France
| | - Ma Teresa Pellicer Martinez
- Centre for Molecular and Structural Biochemistry, School of Chemistry, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, U.K
| | - Chia-Ying Huang
- Macromolecular Crystallography, Swiss Light Source, Paul Scherrer Institute, 5232 Villigen, PSI, Switzerland
| | - Océane Gigarel
- Université Grenoble Alpes, CEA, CNRS, Institut de Biologie Structurale, Metalloproteins Unit, F-38044 Grenoble, France
| | - Clara Rinaldi
- Université Grenoble Alpes, CEA, CNRS, Institut de Biologie Structurale, Metalloproteins Unit, F-38044 Grenoble, France
| | - Nick E Le Brun
- Centre for Molecular and Structural Biochemistry, School of Chemistry, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, U.K
| | - Juan C Fontecilla-Camps
- Université Grenoble Alpes, CEA, CNRS, Institut de Biologie Structurale, Metalloproteins Unit, F-38044 Grenoble, France
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30
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Huang CY, Li JX, Chen SF, Chen JC, Lu Y, Huang QL, Wang LC, Hua YJ, Hu YH. [Years of potential life lost due to premature death of cardiovascular diseases among residents in Suzhou from 1987 to 2017]. Zhonghua Yu Fang Yi Xue Za Zhi 2020; 54:104-107. [PMID: 31914577 DOI: 10.3760/cma.j.issn.0253-9624.2020.01.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
From 1987 to 2017, cardiovascular disease (CVD) had been ranking the first cause of death in Suzhou, and the mortality rate showed an upward trend annual percentage changes (APC=0.62%, P=0.001), while the standardized mortality rate showed a downward trend (APC=-2.65%, P<0.001). The probability of premature death of CVD declined consistently from 7.06% in 1987 to 2.00% in 2017 (APC=-4.45%, P<0.001). When the life expectancy was set at 70, the potential years of life lost rate (PYLLR) decreased from 6.35‰ in 1987 to 3.30‰ in 2017, and the standardized PYLLR decreased from 7.30‰ to 2.68‰. When the life expectancy was set at 75, the PYLLR decreased from 10.12‰ to 5.19‰, and the standardized PYLLR decreased from 11.44‰ to 3.88‰. With the increase of years, all PYLLR and standardized PYLLR showed a significantly downward trend (APC=-2.51%--3.89%, P<0.001).
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Affiliation(s)
- C Y Huang
- Department of Chronic Disease Prevention and Control, Center for Disease Prevention and Control, Suzhou 215004, China
| | - J X Li
- Department of Epidemiology, Fuwai Hospital, National Center for Cardiovascular Diseases/ Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - S F Chen
- Department of Epidemiology, Fuwai Hospital, National Center for Cardiovascular Diseases/ Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - J C Chen
- Department of Epidemiology, Fuwai Hospital, National Center for Cardiovascular Diseases/ Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100037, China
| | - Y Lu
- Department of Chronic Disease Prevention and Control, Center for Disease Prevention and Control, Suzhou 215004, China
| | - Q L Huang
- Department of Chronic Disease Prevention and Control, Center for Disease Prevention and Control, Suzhou 215004, China
| | - L C Wang
- Department of Chronic Disease Prevention and Control, Center for Disease Prevention and Control, Suzhou 215004, China
| | - Y J Hua
- Department of Chronic Disease Prevention and Control, Center for Disease Prevention and Control, Suzhou 215004, China
| | - Y H Hu
- Department of Chronic Disease Prevention and Control, Center for Disease Prevention and Control, Suzhou 215004, China
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31
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Olatunji S, Yu X, Bailey J, Huang CY, Zapotoczna M, Bowen K, Remškar M, Müller R, Scanlan EM, Geoghegan JA, Olieric V, Caffrey M. Structures of lipoprotein signal peptidase II from Staphylococcus aureus complexed with antibiotics globomycin and myxovirescin. Nat Commun 2020; 11:140. [PMID: 31919415 PMCID: PMC6952399 DOI: 10.1038/s41467-019-13724-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Accepted: 11/20/2019] [Indexed: 01/22/2023] Open
Abstract
Antimicrobial resistance is a major global threat that calls for new antibiotics. Globomycin and myxovirescin are two natural antibiotics that target the lipoprotein-processing enzyme, LspA, thereby compromising the integrity of the bacterial cell envelope. As part of a project aimed at understanding their mechanism of action and for drug development, we provide high-resolution crystal structures of the enzyme from the human pathogen methicillin-resistant Staphylococcus aureus (MRSA) complexed with globomycin and with myxovirescin. Our results reveal an instance of convergent evolution. The two antibiotics possess different molecular structures. Yet, they appear to inhibit identically as non-cleavable tetrahedral intermediate analogs. Remarkably, the two antibiotics superpose along nineteen contiguous atoms that interact similarly with LspA. This 19-atom motif recapitulates a part of the substrate lipoprotein in its proposed binding mode. Incorporating this motif into a scaffold with suitable pharmacokinetic properties should enable the development of effective antibiotics with built-in resistance hardiness. The enzyme LspA from the human pathogen Staphylococcus aureus (MRSA) contributes to the integrity and function of the bacterial cell envelope. Here, authors provide crystal structures of LspA in complex with two natural antibiotics, which have profoundly different structures but inhibit LspA in an identical way.
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Affiliation(s)
- Samir Olatunji
- Membrane Structural and Functional Biology Group, School of Medicine and School of Biochemistry and Immunology, Trinity College Dublin, Dublin, D02 R590, Ireland
| | - Xiaoxiao Yu
- Membrane Structural and Functional Biology Group, School of Medicine and School of Biochemistry and Immunology, Trinity College Dublin, Dublin, D02 R590, Ireland
| | - Jonathan Bailey
- Membrane Structural and Functional Biology Group, School of Medicine and School of Biochemistry and Immunology, Trinity College Dublin, Dublin, D02 R590, Ireland
| | - Chia-Ying Huang
- Swiss Light Source, Paul Scherrer Institute, CH-5232, Villigen, Switzerland
| | - Marta Zapotoczna
- Moyne Institute of Preventive Medicine, Department of Microbiology, School of Genetics and Microbiology, Trinity College Dublin, Dublin, D02, Ireland
| | - Katherine Bowen
- School of Chemistry, Trinity College Dublin, Dublin, D02 R590, Ireland
| | - Maja Remškar
- Department Microbial Natural Products, Helmholtz-Institute for Pharmaceutical Research Saarland, Helmholtz Centre for Infection Research and Department of Pharmacy, Saarland University Campus E8 1, D-66123, Saarbrücken, Germany
| | - Rolf Müller
- Department Microbial Natural Products, Helmholtz-Institute for Pharmaceutical Research Saarland, Helmholtz Centre for Infection Research and Department of Pharmacy, Saarland University Campus E8 1, D-66123, Saarbrücken, Germany
| | - Eoin M Scanlan
- School of Chemistry, Trinity College Dublin, Dublin, D02 R590, Ireland
| | - Joan A Geoghegan
- Moyne Institute of Preventive Medicine, Department of Microbiology, School of Genetics and Microbiology, Trinity College Dublin, Dublin, D02, Ireland
| | - Vincent Olieric
- Swiss Light Source, Paul Scherrer Institute, CH-5232, Villigen, Switzerland
| | - Martin Caffrey
- Membrane Structural and Functional Biology Group, School of Medicine and School of Biochemistry and Immunology, Trinity College Dublin, Dublin, D02 R590, Ireland.
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Huang CY, Olieric V, Caffrey M, Wang M. In Meso In Situ Serial X-Ray Crystallography (IMISX): A Protocol for Membrane Protein Structure Determination at the Swiss Light Source. Methods Mol Biol 2020; 2127:293-319. [PMID: 32112330 DOI: 10.1007/978-1-0716-0373-4_20] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
The lipid cubic phases (LCP) have enabled the determination of many important high-resolution structures of membrane proteins such as G-protein-coupled receptors, photosensitive proteins, enzymes, channels, and transporters. However, harvesting the crystals from the glass or plastic plates in which crystals grow is challenging. The in meso in situ serial X-ray crystallography (IMISX) method uses thin plastic windowed plates that minimize LCP crystal manipulation. The method, which is compatible with high-throughput in situ measurements, allows systematic diffraction screening and rapid data collection from hundreds of microcrystals in in meso crystallization wells without direct crystal harvesting. In this chapter, we describe an IMISX protocol for in situ serial X-ray data collection of LCP-grown crystals at both cryogenic and room temperatures which includes the crystallization setup, sample delivery, automated serial diffraction data collection, and experimental phasing. We also detail how the IMISX method was applied successfully for the structure determination of two novel targets-the undecaprenyl-pyrophosphate phosphatase BacA and the chemokine G-protein-coupled receptor CCR2A.
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Affiliation(s)
- Chia-Ying Huang
- Swiss Light Source, Paul Scherrer Institut, Forschungsstrasse 111, Villigen-PSI, 5232, Switzerland.
| | - Vincent Olieric
- Swiss Light Source, Paul Scherrer Institut, Forschungsstrasse 111, Villigen-PSI, 5232, Switzerland
| | - Martin Caffrey
- Membrane Structural and Functional Biology (MS&FB) Group, School of Medicine and School of Biochemistry and Immunology, Trinity College Dublin, Dublin 2, Ireland
| | - Meitian Wang
- Swiss Light Source, Paul Scherrer Institut, Forschungsstrasse 111, Villigen-PSI, 5232, Switzerland
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Huang CY, Wu CK, Lin LY. P2602Inhaled iloprost improves echocardiographic myocardial performance during exercise in heart failure with preserved ejection fraction. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.0926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Introduction
The pathophysiology of HFpEF is complicated and treatments that improve outcomes in HFrEF have no substantial benefits in HFpEF. Impairments in LV global longitudinal strain (GLS) and LV diastolic function parameters have been regarded as novel echocardiographic markers to predict cardiovascular events in HFpEF. Preliminary trials indicate that iloprost, an inhaled prostacyclin analougue, improves exercise hemodynamics in both patients with pulmonary artery hypertension and pulmonary hypertension associated with HFpEF.
Purpose
We aim to investigate the impact of inhaled iloprost on LV global longitudinal strain, LV diastolic function and RV function during exercise in HFpEF population.
Methods
34 patients diagnosed with HFpEF were included with exclusion of severe pulmonary, coronary artery, valvular heart and pericardial diseases. Subjects were randomized 1:1 to inhalation of iloprost or placebo. Transthoracic echocardiography was performed at rest and after 6-minute supine bicycle exercise at 20-Watt workload. We utilized tissue speckle tracking by QLAB software to derive LV GLS and global strain rate during LV isovolumetric relaxation period (SRIVR). E/e', E/SRIVR, tricuspid regurgitation pressure gradient (TRPG), tissue Doppler imaging of RV lateral tricuspid annulus and tricuspid annular plane systolic excursion (TAPSE) were measured to evaluate changes of myocardial performance.
Results
LV GLS during exercise significantly enhanced after iloprost use. E/SRIVR, a novel predictor of LV filling pressure, was significantly decreased. E/e' was also lower in iloprost group by trend. Improvements in RV function and degree of pulmonary hypertension during exercise with iloprost were observed in this study.
Echocardiographic myocardial function endpoints during 20-Watt excercise between iloprost and placebo groups Iloprost (N=17) Placebo (N=17) P value LV global longitudinal strain, % −4.96±1.20 −0.75±3.00 <0.001 E/SRIVR, cm 206.41±113.55 454.13±262.98 0.005 E/e' mean 10.77±2.39 14.41±12.14 0.235 TAPSE, cm 2.62±0.62 2.37±0.56 0.221 TRPG, mmHg 28.37±12.47 44.25±9.29 <0.001 TDI lateral tricuspid annulus, cm/s 16.41±4.61 14.77±2.92 0.222
Effects of iloprost at rest and exercise
Conclusions
Our study is the first to demonstrate that, in patients with HFpEF, inhaled iloprost favorably enhances LV GLS reserves, decreases LV diastolic filling load, reduces pulmonary hypertension and thereby improves RV function during exercise.
Acknowledgement/Funding
This work was supported in part by the National Science Council of the Republic of China, Taiwan (NSC107-2314-B-002-265-MY3)
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Affiliation(s)
- C Y Huang
- Kinmen Hospital, Ministry of Health and Welfare, Division of Cardiology, Department of Internal Medicine, Kinmen, Taiwan
| | - C K Wu
- National Taiwan University, Division of Cardiology, Department of Internal Medicine, Taipei, Taiwan
| | - L Y Lin
- National Taiwan University, Division of Cardiology, Department of Internal Medicine, Taipei, Taiwan
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Martiel I, Pradervand C, Panepucci E, Zamofing T, Nass K, Marsh M, Vera L, Huang CY, Olieric V, Buntschu D, Gobbo A, Kaelin R, Thominet V, Leonarski F, Hora J, Glettig W, Lemke H, Mozzanica A, Redford S, Schmitt B, Bunk O, Abela R, Wang M, Pedrini B. SwissMX: a new versatile instrument for fixed-target femtosecond macromolecular crystallography at SwissFEL. Acta Crystallogr A Found Adv 2019. [DOI: 10.1107/s2053273319095342] [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: 11/10/2022] Open
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35
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Olieric V, Leonarski F, Matsugaki N, Redford S, Mozzanica A, Tomizaki T, Huang CY, Hikita M, Yamada Y, Senda T, Wang M. Fast native-SAD phasing at 3.75 keV with the JUNGFRAU detector. Acta Crystallogr A Found Adv 2019. [DOI: 10.1107/s0108767319097423] [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: 11/10/2022] Open
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36
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Lin H, Ji YH, Chen XL, Zhu SW, Sun J, Huang CY, Jiao YJ. [Sero-prevalence of Babesia infection among voluntary blood donors in Jiangsu Province]. Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi 2019; 31:516-518. [PMID: 31713382 DOI: 10.16250/j.32.1374.2017209] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
OBJECTIVE To evaluate the sero-positivity of Babesia infection in voluntary blood donors in Jiangsu region, so as to provide the evidence for transfusion safety. METHODS A total of 950 blood samples were collected from voluntary blood donors in Jiangsu Provincial Blood Center from February to May, 2017, and detected by double antigen sandwich ELISA targeting peptides derived from B. microti-secreted antigen 1 (BmSA1). The positive samples were confirmed by microscopy and nested-PCR to determine parasitemia. The prevalence of anti-BmSA1 was analyzed between/among different genders, ages and occupations of the blood donors. RESULTS Of the 950 blood screened samples, 5 were positive for anti-BmSA1, and the sero-prevalence of Babesia infection was 0.53%. The 5 samples were all negative by microscopy and nested-PCR. There were no gender- (χ2 = 0.01, P =0.92) or age-specific differences (χ2 = 0.11, P = 0.95) in the sero-prevalence of Babesia infection; however, there was an occupation-specific difference detected in the sero-prevalence of Babesia infection (χ2 = 11.93, P < 0.05). CONCLUSIONS Babesia infection is detected in voluntary blood donors in Jiangsu region, which should be paid much attention.
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Affiliation(s)
- H Lin
- Jiangsu Provincial Blood Center, Nanjing 210042, China
| | - Y H Ji
- Jiangsu Provincial Center for Diseases Control and Prevention, China
| | - X L Chen
- Jiangsu Provincial Blood Center, Nanjing 210042, China
| | - S W Zhu
- Jiangsu Provincial Blood Center, Nanjing 210042, China
| | - J Sun
- Jiangsu Provincial Blood Center, Nanjing 210042, China
| | - C Y Huang
- Jiangsu Provincial Blood Center, Nanjing 210042, China
| | - Y J Jiao
- Jiangsu Provincial Center for Diseases Control and Prevention, China
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37
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Peng SY, Wang XA, Huang CY, Li JT, Hong DF, Liu YB, Cai XJ. [The new classifications of biliary tract diseases based on actual anatomy]. Zhonghua Wai Ke Za Zhi 2019; 57:412-417. [PMID: 31142064 DOI: 10.3760/cma.j.issn.0529-5815.2019.06.004] [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] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
In order to facilitate the treatment strategies for biliary tract injury, hilar cholangiocarcinoma, bile duct tumor thrombus, cholangiocellular carcinoma and bile duct cystic dilatation, many classifications have been made, even more than 10 types for one disease. Each type is represented by numbers or English alphabet, which are not only confusing but also difficult to remember. The Academician Mengchao Wu divided the liver into five sections and four segments base on its anatomy, this classification is very direct and visual, thus had been using till now. In order to overcome those complicated problems, it is considered to develop a new classification based on actual anatomic location similar to that for liver cancer, which is easy to remember and to directly determine the treatment strategy. All kinds of classifications have their own characteristics and advantages and disadvantages. This practical classifications avoid the complexity and may be useful for clinicians.
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Affiliation(s)
- S Y Peng
- Department of General Surgery, the Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou 310009, China
| | - X A Wang
- Department of General Surgery, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200092, China
| | - C Y Huang
- Department of General Surgery, Yuebei People's Hospital Affiliated to Shantou University Medical College, Shaoguan 512025, Guangdong Province, China
| | - J T Li
- Department of General Surgery, the Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou 310009, China
| | - D F Hong
- Department of General Surgery, Sir Run Run Show Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
| | - Y B Liu
- Department of General Surgery, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200092, China
| | - X J Cai
- Department of General Surgery, Sir Run Run Show Hospital, Zhejiang University School of Medicine, Hangzhou 310009, China
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Sarraf SY, Trappen R, Kumari S, Bhandari G, Mottaghi N, Huang CY, Cabrera GB, Bristow AD, Holcomb MB. Application of wavelet analysis on transient reflectivity in ultra-thin films. Opt Express 2019; 27:14684-14694. [PMID: 31163913 DOI: 10.1364/oe.27.014684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/29/2019] [Accepted: 04/27/2019] [Indexed: 06/09/2023]
Abstract
Applications of wavelet analysis in ultra-thin film transient reflectivity (TR) measurements have been investigated. Advantages of utilizing different localized wavelet bases, in position and time, have been addressed on the residual TR signals. Morse wavelets have been used to obtain information from the abrupt oscillatory modes in the signal, which are not distinguishable with conventional methods such as Fourier transforms. These abrupt oscillatory modes are caused by the surface, interface, or any short-lived oscillatory modes which are suppressed in the TR signal in ultra-thin films. It is demonstrated that by choosing different Morse wavelets, information regarding different oscillatory modes in the TR signal of a heterostructure thin film is achievable. Moreover, by performing wavelet analysis on multiferroic heterostructures, oscillatory modes with very close energy ranges are easily distinguishable. For illustration, residuals of the TR signals have been obtained by a pump-probe setup in reflectivity mode on La0.7Sr0.3MnO3/SrTiO3 and BaTiO3/La0.7Sr0.3MnO3/SrTiO3 samples, where sufficient signal to noise ratios have been achieved by taking multiple scans. The residual signals have been analyzed with Morse wavelets, and multiple oscillatory modes with close energy ranges have been observed and distinguished. This approach can isolate the location of various oscillatory modes at the surface, interface and in the bulk of the heterostructure sample.
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Basu S, Olieric V, Leonarski F, Matsugaki N, Kawano Y, Takashi T, Huang CY, Yamada Y, Vera L, Olieric N, Basquin J, Wojdyla JA, Bunk O, Diederichs K, Yamamoto M, Wang M. Long-wavelength native-SAD phasing: opportunities and challenges. IUCrJ 2019; 6:373-386. [PMID: 31098019 PMCID: PMC6503925 DOI: 10.1107/s2052252519002756] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 02/22/2019] [Indexed: 05/04/2023]
Abstract
Native single-wavelength anomalous dispersion (SAD) is an attractive experimental phasing technique as it exploits weak anomalous signals from intrinsic light scatterers (Z < 20). The anomalous signal of sulfur in particular, is enhanced at long wavelengths, however the absorption of diffracted X-rays owing to the crystal, the sample support and air affects the recorded intensities. Thereby, the optimal measurable anomalous signals primarily depend on the counterplay of the absorption and the anomalous scattering factor at a given X-ray wavelength. Here, the benefit of using a wavelength of 2.7 over 1.9 Å is demonstrated for native-SAD phasing on a 266 kDa multiprotein-ligand tubulin complex (T2R-TTL) and is applied in the structure determination of an 86 kDa helicase Sen1 protein at beamline BL-1A of the KEK Photon Factory, Japan. Furthermore, X-ray absorption at long wavelengths was controlled by shaping a lysozyme crystal into spheres of defined thicknesses using a deep-UV laser, and a systematic comparison between wavelengths of 2.7 and 3.3 Å is reported for native SAD. The potential of laser-shaping technology and other challenges for an optimized native-SAD experiment at wavelengths >3 Å are discussed.
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Affiliation(s)
- Shibom Basu
- Swiss Light Source, Paul Scherrer Institut, Villigen PSI, 5232, Switzerland
| | - Vincent Olieric
- Swiss Light Source, Paul Scherrer Institut, Villigen PSI, 5232, Switzerland
| | - Filip Leonarski
- Swiss Light Source, Paul Scherrer Institut, Villigen PSI, 5232, Switzerland
| | - Naohiro Matsugaki
- Structural Biology Research Center, Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba, 305-0801, Japan
| | - Yoshiaki Kawano
- Advanced Photon Technology Division, RIKEN SPring-8 Center, Hyogo 679-5148, Japan
| | - Tomizaki Takashi
- Swiss Light Source, Paul Scherrer Institut, Villigen PSI, 5232, Switzerland
| | - Chia-Ying Huang
- Swiss Light Source, Paul Scherrer Institut, Villigen PSI, 5232, Switzerland
| | - Yusuke Yamada
- Structural Biology Research Center, Photon Factory, Institute of Materials Structure Science, High Energy Accelerator Research Organization, Tsukuba, 305-0801, Japan
| | - Laura Vera
- Swiss Light Source, Paul Scherrer Institut, Villigen PSI, 5232, Switzerland
| | - Natacha Olieric
- Laboratory of Biomolecular Research, Department of Biology and Chemistry, Paul Scherrer Institut, Villigen, PSI 5232, Switzerland
| | - Jerome Basquin
- Department of Biochemistry, Max Planck Institute of Biochemistry, Munich, Germany
| | - Justyna A. Wojdyla
- Swiss Light Source, Paul Scherrer Institut, Villigen PSI, 5232, Switzerland
| | - Oliver Bunk
- Swiss Light Source, Paul Scherrer Institut, Villigen PSI, 5232, Switzerland
| | - Kay Diederichs
- Department of Biology, University of Konstanz, Konstanz, 78457, Germany
| | - Masaki Yamamoto
- Advanced Photon Technology Division, RIKEN SPring-8 Center, Hyogo 679-5148, Japan
| | - Meitian Wang
- Swiss Light Source, Paul Scherrer Institut, Villigen PSI, 5232, Switzerland
- Correspondence e-mail:
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Shi F, Zhang MY, Ma JY, Huang CY, Gao JH, Gu SZ. Medicolegal Identification of Medical Malpractices in Orthopaedic Surgery. Fa Yi Xue Za Zhi 2019; 35:52-57. [PMID: 30896120 DOI: 10.12116/j.issn.1004-5619.2019.01.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Indexed: 11/30/2022]
Abstract
OBJECTIVES To analyze the characteristics of medical malpractices in orthopaedic surgeries, to explore principles and methods in medical legal identification, and to provide basic data for uniform medicolegal standard for the future medical identification. METHODS A retrospective analysis was conducted on 100 cases of medical malpractices in orthopaedic surgery, among the 364 cases archived in Medicolegal Expertise Center of Xi'an Jiaotong University during 2002-2015. RESULTS In the 100 cases of orthopedic medical malpractices, with 104 hospitals involved in, 95 cases were judged with medical errors and the other 9 cases with no error. The top 3 reasons for errors were (1) inadequate observation or estimation of diseases (27.9%), (2) intraoperative improper operation (17.3%), and (3) delayed or missed diagnosis and treatment (12.5%). The consequences of medical malpractices were mostly disability (61%), followed by prolonged diseases (31%) and death (8%). With regard to the causal relationship between medical errors and consequences, 95 cases (91.4%) were with causality and the other 9 cases (8.6%) with no causality. Specifically, 56 cases (53.9%) were with medical errors as the secondary causes accounting for 25% causative potency, and 20 cases (19.2%) were with medical errors as the major causes accounting for 75% causative potency. CONCLUSIONS It is pivotally important for determining the causative potency of medical errors to analyse the causes of damages in orthopaedic surgery and to distinguish subjective factors from objective ones of medical errors.
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Affiliation(s)
- F Shi
- College of Forensic Medicine, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China.,Medicolegal Expertise Center of Xi'an Jiaotong University, Xi'an 710061, China.,Beijing Source of Judicial Identification Center of Scientific Evidence, Beijing 100062, China
| | - M Y Zhang
- College of Forensic Medicine, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China.,Medicolegal Expertise Center of Xi'an Jiaotong University, Xi'an 710061, China
| | - J Y Ma
- Department of Forensic Medicine, Xuzhou Medical University, Xuzhou 221004, Jiangsu Province, China
| | - C Y Huang
- College of Forensic Medicine, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China.,Medicolegal Expertise Center of Xi'an Jiaotong University, Xi'an 710061, China
| | - J H Gao
- College of Forensic Medicine, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China.,Medicolegal Expertise Center of Xi'an Jiaotong University, Xi'an 710061, China
| | - S Z Gu
- College of Forensic Medicine, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China.,Medicolegal Expertise Center of Xi'an Jiaotong University, Xi'an 710061, China
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Apel AK, Cheng RK, Tautermann CS, Brauchle M, Huang CY, Pautsch A, Hennig M, Nar H, Schnapp G. Crystal Structure of CC Chemokine Receptor 2A in Complex with an Orthosteric Antagonist Provides Insights for the Design of Selective Antagonists. Structure 2019; 27:427-438.e5. [DOI: 10.1016/j.str.2018.10.027] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 08/08/2018] [Accepted: 10/25/2018] [Indexed: 12/23/2022]
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Li H, Huang CY, Govorunova EG, Schafer CT, Sineshchekov OA, Wang M, Zheng L, Spudich JL. Crystal structure of a natural light-gated anion channelrhodopsin. eLife 2019; 8:41741. [PMID: 30614787 PMCID: PMC6336409 DOI: 10.7554/elife.41741] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 01/04/2019] [Indexed: 12/28/2022] Open
Abstract
The anion channelrhodopsin GtACR1 from the alga Guillardia theta is a potent neuron-inhibiting optogenetics tool. Presented here, its X-ray structure at 2.9 Å reveals a tunnel traversing the protein from its extracellular surface to a large cytoplasmic cavity. The tunnel is lined primarily by small polar and aliphatic residues essential for anion conductance. A disulfide-immobilized extracellular cap facilitates channel closing and the ion path is blocked mid-membrane by its photoactive retinylidene chromophore and further by a cytoplasmic side constriction. The structure also reveals a novel photoactive site configuration that maintains the retinylidene Schiff base protonated when the channel is open. These findings suggest a new channelrhodopsin mechanism, in which the Schiff base not only controls gating, but also serves as a direct mediator for anion flux.
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Affiliation(s)
- Hai Li
- Department of Biochemistry and Molecular Biology, Center for Membrane Biology, University of Texas Health Science Center - McGovern Medical School, Houston, United States
| | - Chia-Ying Huang
- Swiss Light Source, Paul Scherrer Institute, Villigen, Switzerland
| | - Elena G Govorunova
- Department of Biochemistry and Molecular Biology, Center for Membrane Biology, University of Texas Health Science Center - McGovern Medical School, Houston, United States
| | - Christopher T Schafer
- Department of Biochemistry and Molecular Biology, Center for Membrane Biology, University of Texas Health Science Center - McGovern Medical School, Houston, United States
| | - Oleg A Sineshchekov
- Department of Biochemistry and Molecular Biology, Center for Membrane Biology, University of Texas Health Science Center - McGovern Medical School, Houston, United States
| | - Meitian Wang
- Swiss Light Source, Paul Scherrer Institute, Villigen, Switzerland
| | - Lei Zheng
- Department of Biochemistry and Molecular Biology, Center for Membrane Biology, University of Texas Health Science Center - McGovern Medical School, Houston, United States
| | - John L Spudich
- Department of Biochemistry and Molecular Biology, Center for Membrane Biology, University of Texas Health Science Center - McGovern Medical School, Houston, United States
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43
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Basu S, Kaminski JW, Panepucci E, Huang CY, Warshamanage R, Wang M, Wojdyla JA. Automated data collection and real-time data analysis suite for serial synchrotron crystallography. J Synchrotron Radiat 2019; 26:244-252. [PMID: 30655492 PMCID: PMC6337882 DOI: 10.1107/s1600577518016570] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Accepted: 11/21/2018] [Indexed: 05/03/2023]
Abstract
At the Swiss Light Source macromolecular crystallography (MX) beamlines the collection of serial synchrotron crystallography (SSX) diffraction data is facilitated by the recent DA+ data acquisition and analysis software developments. The SSX suite allows easy, efficient and high-throughput measurements on a large number of crystals. The fast continuous diffraction-based two-dimensional grid scan method allows initial location of microcrystals. The CY+ GUI utility enables efficient assessment of a grid scan's analysis output and subsequent collection of multiple wedges of data (so-called minisets) from automatically selected positions in a serial and automated way. The automated data processing (adp) routines adapted to the SSX data collection mode provide near real time analysis for data in both CBF and HDF5 formats. The automatic data merging (adm) is the latest extension of the DA+ data analysis software routines. It utilizes the sxdm (SSX data merging) package, which provides automatic online scaling and merging of minisets and allows identification of a minisets subset resulting in the best quality of the final merged data. The results of both adp and adm are sent to the MX MongoDB database and displayed in the web-based tracker, which provides the user with on-the-fly feedback about the experiment.
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Affiliation(s)
- Shibom Basu
- Swiss Light Source, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland
| | - Jakub W. Kaminski
- Swiss Light Source, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland
| | - Ezequiel Panepucci
- Swiss Light Source, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland
| | - Chia-Ying Huang
- Swiss Light Source, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland
| | | | - Meitian Wang
- Swiss Light Source, Paul Scherrer Institute, 5232 Villigen PSI, Switzerland
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44
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Huang CY, Olieric V, Howe N, Warshamanage R, Weinert T, Panepucci E, Vogeley L, Basu S, Diederichs K, Caffrey M, Wang M. In situ serial crystallography for rapid de novo membrane protein structure determination. Commun Biol 2018; 1:124. [PMID: 30272004 PMCID: PMC6123769 DOI: 10.1038/s42003-018-0123-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 07/19/2018] [Indexed: 11/30/2022] Open
Abstract
De novo membrane protein structure determination is often limited by the availability of large crystals and the difficulties in obtaining accurate diffraction data for experimental phasing. Here we present a method that combines in situ serial crystallography with de novo phasing for fast, efficient membrane protein structure determination. The method enables systematic diffraction screening and rapid data collection from hundreds of microcrystals in in meso crystallization wells without the need for direct crystal harvesting. The requisite data quality for experimental phasing is achieved by accumulating diffraction signals from isomorphous crystals identified post-data collection. The method works in all experimental phasing scenarios and is particularly attractive with fragile, weakly diffracting microcrystals. The automated serial data collection approach can be readily adopted at most microfocus macromolecular crystallography beamlines.
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Affiliation(s)
- Chia-Ying Huang
- Swiss Light Source, Paul Scherrer Institute, CH-5232, Villigen, Switzerland
| | - Vincent Olieric
- Swiss Light Source, Paul Scherrer Institute, CH-5232, Villigen, Switzerland
| | - Nicole Howe
- Membrane Structural and Functional Biology (MS&FB) Group, School of Medicine and School of Biochemistry and Immunology, Trinity College Dublin, Dublin 2, D02 R590, Ireland
| | | | - Tobias Weinert
- Swiss Light Source, Paul Scherrer Institute, CH-5232, Villigen, Switzerland
| | - Ezequiel Panepucci
- Swiss Light Source, Paul Scherrer Institute, CH-5232, Villigen, Switzerland
| | - Lutz Vogeley
- Membrane Structural and Functional Biology (MS&FB) Group, School of Medicine and School of Biochemistry and Immunology, Trinity College Dublin, Dublin 2, D02 R590, Ireland
| | - Shibom Basu
- Swiss Light Source, Paul Scherrer Institute, CH-5232, Villigen, Switzerland
| | - Kay Diederichs
- Fachbereich Biologie, Universität Konstanz, M647, D-78457, Konstanz, Germany
| | - Martin Caffrey
- Membrane Structural and Functional Biology (MS&FB) Group, School of Medicine and School of Biochemistry and Immunology, Trinity College Dublin, Dublin 2, D02 R590, Ireland.
| | - Meitian Wang
- Swiss Light Source, Paul Scherrer Institute, CH-5232, Villigen, Switzerland.
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45
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Li AX, Huang CY, Zhang HW, Zhang T, Wu H, Wang W. [Research on risk factors of short-term outcome in AIDS patients with pneumocystis pneumonia]. Zhonghua Yi Xue Za Zhi 2018; 97:833-837. [PMID: 28355738 DOI: 10.3760/cma.j.issn.0376-2491.2017.11.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the prognostic risk factors of acquired immunodeficiency syndrome (AIDS) patients with pneumocystis pneumonia (PCP), and to establish risk models for predicting early outcome. Methods: The clinical data of 418 AIDS patients with PCP admitted to Department of Infectious Diseases, Beijing You'an Hospital, Capital Medical University from January 2008 to May 2016 were retrospectively analyzed.The patients were divided into death group and survival group according to clinical outcome during hospitalization.Data of the two groups were collected including general information and laboratory test results.Multivariate Logistic regression was used to analyze risk factors affecting prognosis of patients, establish prognostic models and evaluate predictive value of the model. Results: Of the 418 AIDS patients with PCP, 388 cases were male and 30 cases were female, aged from 5 to 82 years, mean age was (40±12) years.There were 82 patients in the death group and 336 patients in the survival group.Disease course, bacterial infection and alveolar-arterial oxygen pressure difference(P(A-a)O(2)), serum lactate dehydrogenase(LDH), white blood cell (WBC), neutrophil (N), alanine aminotransferase (AST), urea nitrogen (BUN) and serum potassium (K) were significantly higher in the death group than those in the survival group (all P<0.05), and arterial oxygen pressure (PaO(2)), blood oxygen saturation (SpO(2)), CD4(+) T lymphocyte count, lymphocyte (L) , hemoglobin (Hb), platelet (PLT), albumin (ALB), prealbumin (PALB), cholinesterase (CHE), cholesterol (CHO), serum chlorine (Cl) and serum sodium (Na) were significantly lower in the death group than those in the survival group (all P<0.05). Multivariate Logistic regression analysis showed that P(A-a)O(2, )ALB, LDH, N and CD4(+) T lymphocyte count were prognostic factors of AIDS complicated with PCP.Prognostic index=9.736+ 0.112×P(A-a)O(2)-0.719×ALB+ 0.006×LDH+ 0.355×N-0.021×CD4.ROC curve of the short-term prognostic model was 0.985 (95%CI 0.977-0.994), with P value 0.000, cut-off value 0.907, sensitivity 92.0% and specificity 98.8%.The mortality rate increased with the increase of equation value. Conclusions: P(A-a)O(2, )ALB, LDH, N and CD4(+) T lymphocyte count are independent risk factors to predict short-term prognosis in these patients.The short-term prognostic model based on independent risk factors is useful in guiding clinical treatment.
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Affiliation(s)
- A X Li
- Department of Infection, Beijing You'an Hospital, Capital Medical University, Beijing 100069, China
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46
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Cave J, Paschalis A, Huang CY, West M, Copson E, Jack S, Grocott MPW. A systematic review of the safety and efficacy of aerobic exercise during cytotoxic chemotherapy treatment. Support Care Cancer 2018; 26:3337-3351. [PMID: 29936624 DOI: 10.1007/s00520-018-4295-x] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2018] [Accepted: 05/27/2018] [Indexed: 11/30/2022]
Abstract
PURPOSE Aerobic exercise improves prognosis and quality of life (QoL) following completion of chemotherapy. However, the safety and efficacy of aerobic exercise during chemotherapy is less certain. A systematic review was performed of randomised trials of adult patients undergoing chemotherapy, comparing an exercise intervention with standard care. METHOD From 253 abstracts screened, 33 unique trials were appraised in accordance with PRISMA guidance, including 3257 patients. Interventions included walking, jogging or cycling, and 23 were of moderate intensity (50-80% maximum heart rate). RESULTS Aerobic exercise improved, or at least maintained fitness during chemotherapy. Moderately intense exercise, up to 70-80% of maximum heart rate, was safe. Any reported adverse effects of exercise were mild and self-limiting, but reporting was inconsistent. Adherence was good (median 72%). Exercise improved QoL and physical functioning, with earlier return to work. Two out of four studies reported improved chemotherapy completion rates. Four out of six studies reported reduced chemotherapy toxicity. There was no evidence that exercise reduced myelosuppression or improved response rate or survival. CONCLUSIONS Exercise during chemotherapy is safe and should be encouraged because of beneficial effects on QoL and physical functioning. More research is required to determine the impact on chemotherapy completion rates and prognosis.
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Affiliation(s)
- J Cave
- Department of Medical Oncology, University Hospital Southampton NHS Foundation Trust, MP 307, Tremona Road, Southampton, SO16 6YD, UK.
| | - A Paschalis
- Department of Medical Oncology, University Hospital Southampton NHS Foundation Trust, MP 307, Tremona Road, Southampton, SO16 6YD, UK
| | - C Y Huang
- Department of Acute Internal Medicine, Chelsea and Westminster Hospital NHS Foundation Trust, London, UK
| | - M West
- Department of Surgery, University Hospital Southampton NHS Foundation Trust, Southampton, UK
| | - E Copson
- Department of Medical Oncology, University Hospital Southampton NHS Foundation Trust, MP 307, Tremona Road, Southampton, SO16 6YD, UK
| | - S Jack
- Department of Critical Care Research, University Hospital Southampton NHS Foundation Trust, Southampton, UK
| | - M P W Grocott
- Department of Critical Care Research, University Hospital Southampton NHS Foundation Trust, Southampton, UK
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Yin W, Zhou XE, Yang D, de Waal PW, Wang M, Dai A, Cai X, Huang CY, Liu P, Wang X, Yin Y, Liu B, Zhou Y, Wang J, Liu H, Caffrey M, Melcher K, Xu Y, Wang MW, Xu HE, Jiang Y. Crystal structure of the human 5-HT 1B serotonin receptor bound to an inverse agonist. Cell Discov 2018; 4:12. [PMID: 29560272 PMCID: PMC5847559 DOI: 10.1038/s41421-018-0009-2] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Accepted: 12/22/2017] [Indexed: 02/02/2023] Open
Abstract
5-hydroxytryptamine (5-HT, also known as serotonin) regulates many physiological processes through the 5-HT receptor family. Here we report the crystal structure of 5-HT1B subtype receptor (5-HT1BR) bound to the psychotropic serotonin receptor inverse agonist methiothepin (MT). Crystallization was facilitated by replacing ICL3 with a novel optimized variant of BRIL (OB1) that enhances the formation of intermolecular polar interactions, making OB1 a potential useful tool for structural studies of membrane proteins. Unlike the agonist ergotamine (ERG), MT occupies only the conserved orthosteric binding pocket, explaining the wide spectrum effect of MT on serotonin receptors. Compared with ERG, MT shifts toward TM6 and sterically pushes residues W3276.48, F3306.50 and F3316.51 from inside the orthosteric binding pocket, leading to an outward movement of the extracellular end and a corresponding inward shift of the intracellular end of TM6, a feature shared by other reported inactive G protein-coupled receptor (GPCR) structures. Together with the previous agonist-bound serotonin receptor structures, the inverse agonist-bound 5-HT1BR structure identifies a basis for the ligand-mediated switch of 5-HT1BR activity and provides a structural understanding of the inactivation mechanism of 5-HT1BR and some other class A GPCRs, characterized by ligand-induced outward movement of the extracellular end of TM6 that is coupled with inward movement of the cytoplasmic end of this helix.
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Affiliation(s)
- Wanchao Yin
- VARI-SIMM Center, Center for Structure and Function of Drug Targets, The CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203 China
- University of Chinese Academy of Sciences, No.19 A Yuquan Road, Beijing, 100049 China
- The CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences (CAS), Shanghai, 201203 China
- Laboratory of Structural Sciences, Van Andel Research Institute, Grand Rapids, MI 49503 USA
| | - X. Edward Zhou
- VARI-SIMM Center, Center for Structure and Function of Drug Targets, The CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203 China
- Laboratory of Structural Sciences, Van Andel Research Institute, Grand Rapids, MI 49503 USA
| | - Dehua Yang
- The CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences (CAS), Shanghai, 201203 China
- The National Center for Drug Screening, Shanghai, 201203 China
| | - Parker W. de Waal
- Laboratory of Structural Sciences, Van Andel Research Institute, Grand Rapids, MI 49503 USA
| | - Meitian Wang
- Swiss Light Source, Paul Scherrer Institute, Villigen, 5232 Switzerland
| | - Antao Dai
- The CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences (CAS), Shanghai, 201203 China
- The National Center for Drug Screening, Shanghai, 201203 China
| | - Xiaoqing Cai
- The CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences (CAS), Shanghai, 201203 China
- The National Center for Drug Screening, Shanghai, 201203 China
| | - Chia-Ying Huang
- Swiss Light Source, Paul Scherrer Institute, Villigen, 5232 Switzerland
| | - Ping Liu
- VARI-SIMM Center, Center for Structure and Function of Drug Targets, The CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203 China
| | - Xiaoxi Wang
- VARI-SIMM Center, Center for Structure and Function of Drug Targets, The CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203 China
| | - Yanting Yin
- VARI-SIMM Center, Center for Structure and Function of Drug Targets, The CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203 China
- Laboratory of Structural Sciences, Van Andel Research Institute, Grand Rapids, MI 49503 USA
| | - Bo Liu
- VARI-SIMM Center, Center for Structure and Function of Drug Targets, The CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203 China
| | - Yu Zhou
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, CAS, Shanghai, 201203 China
| | - Jiang Wang
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, CAS, Shanghai, 201203 China
| | - Hong Liu
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, CAS, Shanghai, 201203 China
| | - Martin Caffrey
- Membrane Structural and Functional Biology Group, Schools of Medicine and Biochemistry and Immunology, Trinity College Dublin, Dublin, Ireland
| | - Karsten Melcher
- Laboratory of Structural Sciences, Van Andel Research Institute, Grand Rapids, MI 49503 USA
| | - Yechun Xu
- The CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences (CAS), Shanghai, 201203 China
| | - Ming-Wei Wang
- The CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences (CAS), Shanghai, 201203 China
- The National Center for Drug Screening, Shanghai, 201203 China
- School of Pharmacy, Fudan University, Shanghai, 201203 China
- School of Life Science and Technology, ShanghaiTech University, Pudong, Shanghai 201203 China
| | - H. Eric Xu
- VARI-SIMM Center, Center for Structure and Function of Drug Targets, The CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203 China
- Laboratory of Structural Sciences, Van Andel Research Institute, Grand Rapids, MI 49503 USA
| | - Yi Jiang
- VARI-SIMM Center, Center for Structure and Function of Drug Targets, The CAS Key Laboratory of Receptor Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203 China
- Laboratory of Structural Sciences, Van Andel Research Institute, Grand Rapids, MI 49503 USA
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Basu S, Olieric V, Takashi T, Huang CY, Wojdyla J, Matsugaki N, Wang M. Challenges and strategies for n-SAD phasing at longer X-ray wavelength. Acta Crystallogr A Found Adv 2017. [DOI: 10.1107/s2053273317086715] [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: 11/10/2022] Open
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49
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Zhao DT, Guo CL, Yan HP, Liao HY, Liu YM, Zhang HP, An LS, Huang CY, Han Y, Zhao Y. [Characteristics of IgH-CDR3 repertoire of peripheral B cells in a patient with primary biliary cholangitis: a preliminary study using high-throughput sequencing]. Zhonghua Gan Zang Bing Za Zhi 2017; 25:847-851. [PMID: 29325279 DOI: 10.3760/cma.j.issn.1007-3418.2017.11.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To analyze the characteristics of immunoglobulin heavy chain complementarity-determining region (IgH-CDR3) repertoire of peripheral B cells in a patient with primary biliary cholangitis (PBC) and to investigate the diversity of the immune system. Methods: Arm-PCR was used to amplify the IgH-CDR3 region of circulating B cells isolated from a PBC patient, and high-throughput sequencing was used to analyze the amplified product. The characteristics of immune repertoire were analyzed by bioinformatics. Results: In total, 329219 sequence reads were generated from the sample, with 325540 total CDR3 sequences and 72774 distinct CDR3 sequences, and the D50 of IGH-CDR3 was 7.7. The dominant CDR3 length of the sample was 45 nt (9.6%); the N addition with the highest frequency ranged from 13 to 14 nt (5.25%); the J trimming with the highest frequency was 0 nt (12.7%); the three most frequent V alleles were V4-59 (9.5%), V3-23 (8.1%), and V1-69 (6.4%). Conclusion: The diversity of IgH-CDR3 repertoire is relatively low in this patient with PBC, with several B-cell clonal expansions. The specificity needs to be further verified after increasing the sample size.
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Affiliation(s)
- D T Zhao
- Clinical Research Center for Autoimmune Liver Disease & Clinical Laboratory Center, Beijing You'an Hospital, Capital Medical University, Beijing 100069, China
| | - C L Guo
- National Research Institute for Family Planning, Beijing 100081, China
| | - H P Yan
- Clinical Research Center for Autoimmune Liver Disease & Clinical Laboratory Center, Beijing You'an Hospital, Capital Medical University, Beijing 100069, China
| | - H Y Liao
- Department of Liver Disease Immunology, Beijing You'an Hospital, Capital Medical University, Beijing 100069, China
| | - Y M Liu
- Department of Liver Disease Immunology, Beijing You'an Hospital, Capital Medical University, Beijing 100069, China
| | - H P Zhang
- Clinical Research Center for Autoimmune Liver Disease & Clinical Laboratory Center, Beijing You'an Hospital, Capital Medical University, Beijing 100069, China
| | - L S An
- National Research Institute for Family Planning, Beijing 100081, China
| | - C Y Huang
- Department of Liver Disease Immunology, Beijing You'an Hospital, Capital Medical University, Beijing 100069, China
| | - Y Han
- Department of Liver Disease Immunology, Beijing You'an Hospital, Capital Medical University, Beijing 100069, China
| | - Y Zhao
- Clinical Research Center for Autoimmune Liver Disease & Clinical Laboratory Center, Beijing You'an Hospital, Capital Medical University, Beijing 100069, China
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50
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Han Y, Yan HP, Liao HY, Sun LM, Huang YL, Huang CY, Zhang HP, Zhang XD, Bian XQ, Ren MX, Du XF, Liu YM. [Clinical value of anti-liver/kidney microsomal-1 antibody in patients with liver disease]. Zhonghua Gan Zang Bing Za Zhi 2017; 25:852-857. [PMID: 29325280 DOI: 10.3760/cma.j.issn.1007-3418.2017.11.010] [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] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Objective: To investigate the clinical and laboratory features of patients with liver disease and positive anti-liver/kidney microsomal-1 (anti-LKM-1) antibody, and to provide a reference for clinical diagnosis and differential diagnosis. Methods: The clinical data of patients with positive anti-LKM-1 antibody who were treated in our hospital from 2006 to 2016 were collected, and clinical and laboratory features were analyzed and compared. An analysis was also performed for special cases. Results: The measurement of related autoantibodies was performed for about 100 thousand case-times, and 15 patients were found to have positive anti-LKM-1 antibody. Among the 15 patients, 7 were diagnosed with type 2 autoimmune hepatitis (AIH) with an age of 11.0 ± 9.0 years and were all adolescents with acute onset; 8 were diagnosed with hepatitis C with an age of 51.5 ± 9.0 years, among whom 7 were middle-aged patients and 1 was a child aged 12 years, and all of them had an insidious onset. Compared with the patients with hepatitis C, the AIH patients had significantly higher levels of alanine aminotransferase (1 003.9 ± 904.3 U/L vs 57.0 ± 84.1 U/L, P < 0.05), aspartate aminotransferase (410.7 ± 660.3 U/L vs 34.9 ± 42.9 U/L, P < 0.05), and total bilirubin (98.0 ± 191.0 μmol/L vs 15.4 ± 6.0 μmol/L, P < 0.05). There was a reduction in immunoglobulin G after the treatment with immunosuppressant, compared with the baseline. Of all 8 patients with hepatitis C, 6 received antiviral therapy with interferon and ribavirin, and 5 out of them achieved complete response, among whom 4 had a reduction in the level of anti-LKM-1 antibody after treatment; however, a 12-year-old child developed liver failure after interferon treatment and died eventually. Conclusion: Positive anti-LKM-1 antibody is commonly seen in patients with type 2 AIH or hepatitis C, but there are differences between these two groups of patients in terms of age, disease onset, liver function, and the level of anti-LKM-1 antibody. The hepatitis C patients with a confirmed diagnosis and exclusion of autoimmune hepatitis can achieve good response to interferon under close monitoring, even if anti-LKM-1 antibody is positive. As for adolescent patients with hepatitis C and positive anti-LKM-1 antibody, the possibility of AIH should be excluded.
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Affiliation(s)
- Y Han
- Department of Hepatitis Immunity, Beijing You'an Hospital Affiliated to Capital Medical University, Beijing 100069, China
| | - H P Yan
- Clinical Testing Center, Beijing You'an Hospital Affiliated to Capital Medical University, Beijing 100069, China
| | - H Y Liao
- Department of Hepatitis Immunity, Beijing You'an Hospital Affiliated to Capital Medical University, Beijing 100069, China
| | - L M Sun
- Clinical Testing Center, Beijing You'an Hospital Affiliated to Capital Medical University, Beijing 100069, China
| | - Y L Huang
- Department of Hepatitis Immunity, Beijing You'an Hospital Affiliated to Capital Medical University, Beijing 100069, China
| | - C Y Huang
- Department of Hepatitis Immunity, Beijing You'an Hospital Affiliated to Capital Medical University, Beijing 100069, China
| | - H P Zhang
- Clinical Testing Center, Beijing You'an Hospital Affiliated to Capital Medical University, Beijing 100069, China
| | - X D Zhang
- Department of Hepatitis Immunity, Beijing You'an Hospital Affiliated to Capital Medical University, Beijing 100069, China
| | - X Q Bian
- Department of Hepatitis Immunity, Beijing You'an Hospital Affiliated to Capital Medical University, Beijing 100069, China
| | - M X Ren
- Department of Hepatitis Immunity, Beijing You'an Hospital Affiliated to Capital Medical University, Beijing 100069, China
| | - X F Du
- Department of Hepatitis Immunity, Beijing You'an Hospital Affiliated to Capital Medical University, Beijing 100069, China
| | - Y M Liu
- Department of Hepatitis Immunity, Beijing You'an Hospital Affiliated to Capital Medical University, Beijing 100069, China
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