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Guo JW, Xiao Y. [Impact of COVID-19 on the treatment of sleep medicine]. Zhonghua Jie He He Hu Xi Za Zhi 2024; 47:292-296. [PMID: 38448185 DOI: 10.3760/cma.j.cn112147-20230809-00056] [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: 03/08/2024]
Abstract
The outbreak of coronavirus disease 2019 (COVID-19) has become a major threat to the global healthcare system. As an airborne disease, COVID-19 posed a great challenge to the management of sleep medicine. Given the increased risk of adverse events in obstructive sleep apnea patients infected with COVID-19, strategies have been proposed worldwide. These include standard treatment procedure, use of self-protect equipment, telemedicine services, development of machine learning and portable monitoring, and in-home sleep monitoring and titration. This review aims to introduce the impact of COVID-19 on the operation of sleep medicine landscape and provide advice on public health care emergency.
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Affiliation(s)
- J W Guo
- Department of Respiratory and Critical Care Medicine, Peking Union Medical College Hospital, Peking Union Medical College Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Y Xiao
- Department of Respiratory and Critical Care Medicine, Peking Union Medical College Hospital, Peking Union Medical College Chinese Academy of Medical Sciences, Beijing 100730, China
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Liang J, Chen YL, Lu RL, Guo JW, Hong XP, Liu DZ. [Research progress of serum biomarkers in interstitial lung disease associated with connective tissue disease]. Zhonghua Nei Ke Za Zhi 2024; 63:310-315. [PMID: 38448195 DOI: 10.3760/cma.j.cn112138-20231005-00182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Affiliation(s)
- J Liang
- The Second Clinical Medicine School of Jinan University, Shenzhen 518020, China
| | - Y L Chen
- Department of Rheumatology and Immunology, Shenzhen People's Hospital, the Second Clinical Medical School of Jinan University, Shenzhen 518020, China
| | - R L Lu
- The Second Clinical Medicine School of Jinan University, Shenzhen 518020, China
| | - J W Guo
- The Second Clinical Medicine School of Jinan University, Shenzhen 518020, China
| | - X P Hong
- Department of Rheumatology and Immunology, Shenzhen People's Hospital, the Second Clinical Medical School of Jinan University, Shenzhen 518020, China
| | - D Z Liu
- Department of Rheumatology and Immunology, Shenzhen People's Hospital, the Second Clinical Medical School of Jinan University, Shenzhen 518020, China
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Liu J, Li X, Guo JW, Chen BX, Sun H, Huang JQ, Hu Y, Xu XY, Jiang MT, Gao XM, Yang WZ, Wang QL, Guo DA. Characterization and comparison of cardiomyocyte protection activities of non-starch polysaccharides from six ginseng root herbal medicines. Int J Biol Macromol 2023; 253:126994. [PMID: 37730001 DOI: 10.1016/j.ijbiomac.2023.126994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 09/02/2023] [Accepted: 09/17/2023] [Indexed: 09/22/2023]
Abstract
Ginseng is rich of polysaccharides, however, the evidence supporting polysaccharides to distinguish various ginseng species is rarely reported. Focusing on six root ginseng (e.g., Panax ginseng-PG, P. quinquefolius-PQ, P. notoginseng-PN, red ginseng-RG, P. japonicus-PJ, and P. japonicus var. major-PJM), the contained non-starch polysaccharides (NPs) were structurally characterized and compared by both the chemical and biological evaluation. Holistic fingerprinting at three levels (the NPs and the acid hydrolysates involving oligosaccharides and monosaccharides) utilized various chromatography methods, and the treatment of H9c2 cells with the NPs by OGD and H2O2-induced injury models was used to assess the protective effect. NPs from six Panax herbal medicines occupied about 20 % of the total polysaccharides, which were of the highest content in RG and the lowest in PN. NPs from six ginseng exhibited weak differentiations in the molecular weight distribution, while marker oligosaccharides were found to distinguish PN and RG from the others. Glc and GalA were more abundant in the NPs for PG and RG, respectively. NPs from PQ (100/200 μg/mL) showed significant cardiomyocyte protection effect by regulating the mitochondrial functions. This work further testifies the role of polysaccharides in quality control of herbal medicine, with new markers discovered beneficial to distinguish the ginseng.
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Affiliation(s)
- Jie Liu
- State Key Laboratory of Component-based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin 301617, China; Haihe Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin 301617, China; School of Pharmacy, Hebei Medical University, 361 Zhongshan Donglu, Shijiazhuang, Hebei 050017, China
| | - Xue Li
- State Key Laboratory of Component-based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin 301617, China; Haihe Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin 301617, China
| | - Jing-Wen Guo
- State Key Laboratory of Component-based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin 301617, China; Haihe Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin 301617, China
| | - Bo-Xue Chen
- State Key Laboratory of Component-based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin 301617, China; Haihe Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin 301617, China
| | - He Sun
- State Key Laboratory of Component-based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin 301617, China; Haihe Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin 301617, China
| | - Jia-Qi Huang
- State Key Laboratory of Component-based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin 301617, China; Haihe Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin 301617, China
| | - Ying Hu
- State Key Laboratory of Component-based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin 301617, China
| | - Xiao-Yan Xu
- State Key Laboratory of Component-based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin 301617, China; Haihe Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin 301617, China
| | - Mei-Ting Jiang
- State Key Laboratory of Component-based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin 301617, China; Haihe Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin 301617, China
| | - Xiu-Mei Gao
- State Key Laboratory of Component-based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin 301617, China; Haihe Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin 301617, China; Ministry of Education Key Laboratory of Pharmacology of Traditional Chinese Medical Formulae, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin 301617, China
| | - Wen-Zhi Yang
- State Key Laboratory of Component-based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin 301617, China; Haihe Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin 301617, China.
| | - Qi-Long Wang
- State Key Laboratory of Component-based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin 301617, China; Haihe Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin 301617, China.
| | - De-An Guo
- State Key Laboratory of Component-based Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin 301617, China; Haihe Laboratory of Modern Chinese Medicine, Tianjin University of Traditional Chinese Medicine, 10 Poyanghu Road, Tianjin 301617, China; National Engineering Laboratory for TCM Standardization Technology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, 501 Haike Road, Shanghai 201203, China.
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Xu FX, Wang XT, Cai XY, Liu JY, Guo JW, Yang F, Chen W, Schonewille M, De Zeeuw C, Zhou L, Shen Y. Purkinje-cell-specific MeCP2 deficiency leads to motor deficits and autistic-like behavior due to aberrations in PTP1B-TrkB-SK signaling. Cell Rep 2023; 42:113559. [PMID: 38100348 DOI: 10.1016/j.celrep.2023.113559] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2022] [Revised: 10/05/2023] [Accepted: 11/22/2023] [Indexed: 12/17/2023] Open
Abstract
Patients with Rett syndrome suffer from a loss-of-function mutation of the Mecp2 gene, which results in various symptoms including autistic traits and motor deficits. Deletion of Mecp2 in the brain mimics part of these symptoms, but the specific function of methyl-CpG-binding protein 2 (MeCP2) in the cerebellum remains to be elucidated. Here, we demonstrate that Mecp2 deletion in Purkinje cells (PCs) reduces their intrinsic excitability through a signaling pathway comprising the small-conductance calcium-activated potassium channel PTP1B and TrkB, the receptor of brain-derived neurotrophic factor. Aberration of this cascade, in turn, leads to autistic-like behaviors as well as reduced vestibulocerebellar motor learning. Interestingly, increasing activity of TrkB in PCs is sufficient to rescue PC dysfunction and abnormal motor and non-motor behaviors caused by Mecp2 deficiency. Our findings highlight how PC dysfunction may contribute to Rett syndrome, providing insight into the underlying mechanism and paving the way for rational therapeutic designs.
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Affiliation(s)
- Fang-Xiao Xu
- Department of Physiology and Department of Psychiatry, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China
| | - Xin-Tai Wang
- Department of Physiology and Department of Psychiatry, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China; Institute of Life Sciences, College of Life and Environmental Sciences, Hangzhou Normal University, Hangzhou 311121, China
| | - Xin-Yu Cai
- Department of Physiology and Department of Psychiatry, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China
| | - Jia-Yu Liu
- Department of Physiology and Department of Psychiatry, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China
| | - Jing-Wen Guo
- Department of Physiology and Department of Psychiatry, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China
| | - Fan Yang
- Department of Biophysics, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Wei Chen
- Department of Physiology and Department of Psychiatry, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China
| | - Martijn Schonewille
- Department of Neuroscience, Erasmus University Medical Center, 3000 DR Rotterdam, the Netherlands
| | - Chris De Zeeuw
- Department of Neuroscience, Erasmus University Medical Center, 3000 DR Rotterdam, the Netherlands; The Netherlands Institute for Neuroscience, Royal Dutch Academy of Arts and Science, 1105 CA Amsterdam, the Netherlands.
| | - Lin Zhou
- Department of Physiology and Department of Psychiatry, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China.
| | - Ying Shen
- Department of Physiology and Department of Psychiatry, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou 310000, China; International Institutes of Medicine, Fourth Affiliated Hospital, Zhejiang University School of Medicine, Yiwu 322000, China; Key Laboratory of Medical Neurobiology of Zhejiang Province, Zhejiang University School of Medicine, Hangzhou 310000, China.
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Seow CS, Chan DKH, Bohari A, Guo JW, Sy LL. Predictors of Clinical Outcomes in Acute Appendicitis: A Retrospective Study. Med J Malaysia 2022; 77:331-337. [PMID: 35638490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
INTRODUCTION Acute appendicitis is one of the most common causes of intra-abdominal emergency surgery worldwide. This study was conducted to contribute to global databases by presenting data from our institution, which consist of multi-racial population. We aimed to evaluate the presentation, diagnosis, and management of acute appendicitis and post-operative outcome in our institution and evaluate the risks factors associated with severe complications and prolonged length of stay (LOS). MATERIALS AND METHODS We performed a retrospective analysis using multivariate regression analysis of all patients who underwent appendectomy (2009-2014) in our institution. The primary outcomes included demographics, presentation, and perioperative management, and the secondary outcomes included risk factors associated with prolonged LOS. RESULTS Of the 1185 patients, the mean age was 36.4 years, and 940 (79.3%) were male. Majority (98.1%) of patients were ASA (American Society of Anaesthesiologists) 1 or 2. Most of them (83.9%) were from the four racial subgroups (Chinese, Malay, Bangladeshi, and Indian). There was no racial variation in the diagnosis and presentation of disease. The mean duration of symptoms was 1.8 days. The history was commonly a localised or migratory abdominal pain associated with anorexia, nausea, vomiting, and fever. The commonest physical findings were right-sided abdominal tenderness associated with rebound and guarding. About 42.9% of the patients underwent pre-operative CT scan to establish the diagnosis of appendicitis prior to surgery, whilst 57.1% underwent surgery on clinical diagnosis and blood investigation (NWR and CRP). An open appendectomy was performed in 13.2% of the patients. The conversion rate of laparoscopic appendectomy was 4.9% (n = 50). The mean length of hospital stay was 3.6 days. On multivariate Cox regression, patients of Burmese and Thai descent were independently associated with a prolonged LOS. The postoperative morbidity was 5.5%. The 30-day readmission rate was 2.4%. There was no mortality in our study. DISCUSSION Our study showed that pre-operative diagnosis of acute appendicitis can be made accurately by classical clinical presentation or by imaging. Independent risk factors associated with increased LOS included increased age, male gender, prolonged duration of symptoms pre-admission, fever, generalised tenderness, and prolonged operative time. The effect of race on LOS has been observed in the literature for other surgical procedures. The prolonged LOS found in Burmese and Thai patients contribute to the possibility of intrinsic racial differences in the post-surgery recovery. However, the numbers are small and therefore prone to type I error. Compared to the open approach, the use of laparoscopic appendectomy was associated with shorter LOS. This has similar outcomes to those reported in the literature. CONCLUSION The identification of risks factors could help surgical team to predict the clinical outcomes and develop risk reduction strategy in post-operative care of these patients.
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Affiliation(s)
- C S Seow
- Ng Teng Fong General Hospital, Department of Surgery, Jurong Health Campus, National University Health System, Singapore.
| | - D K H Chan
- Ng Teng Fong General Hospital, Department of Surgery, Jurong Health Campus, National University Health System, Singapore
| | - A Bohari
- Jurong Community Hospital, Jurong Health Campus, National University Health System, Singapore
| | - J W Guo
- Jurong Community Hospital, Jurong Health Campus, National University Health System, Singapore
| | - L L Sy
- Ng Teng Fong General Hospital, Department of Surgery, Jurong Health Campus, National University Health System, Singapore
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Guo JW, Huang R, Xiao Y. [Facial identification in the diagnosis of obstructive sleep apnea]. Zhonghua Jie He He Hu Xi Za Zhi 2021; 44:496-499. [PMID: 34865372 DOI: 10.3760/cma.j.cn112147-20200628-00755] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
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Lu W, Qian C, Zhang WH, Ma HY, Ma JD, Feng YC, Li LB, Li LX, Guo JW, Huang W, Zhang XZ, Sun LT, Zhao HW. Production of metallic ion beams by electron cyclotron resonance ion sources equipped with inductive heating ovens at the Institute of Modern Physics. Rev Sci Instrum 2021; 92:033302. [PMID: 33820031 DOI: 10.1063/5.0041671] [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] [Subscribe] [Scholar Register] [Received: 12/24/2020] [Accepted: 02/17/2021] [Indexed: 06/12/2023]
Abstract
A high-temperature oven based on the inductive heating technology was developed successfully at the Institute of Modern Physics in 2019. This oven features a durable operation temperature of over 2000 °C inside the tantalum susceptor. By carefully designing the oven structure, the material compatibility issue at high temperature has been successfully solved, which enables the production and routine operation of refractory metal ions with SECRAL-II (Superconducting Electron Cyclotron Resonance ion source with Advanced design in Lanzhou No. 2). To further apply this type of oven to the room temperature ECR ion sources LECR4 and LECR5 (Lanzhou Electron Cyclotron Resonance ion source No. 4 and 5), a mini-inductive heating oven has been fabricated and tested in 2020. By directly evaporating calcium oxide, some high charge state calcium beams have been produced successfully, such as 52 euA of 40Ca16+, 30 euA of 40Ca17+, and 12 euA of 40Ca18+. The detailed design and testing results will be presented and discussed.
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Affiliation(s)
- W Lu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - C Qian
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - W H Zhang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - H Y Ma
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - J D Ma
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - Y C Feng
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - L B Li
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - L X Li
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - J W Guo
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - W Huang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - X Z Zhang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - L T Sun
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - H W Zhao
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
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Li JB, Li LX, Li LB, Guo JW, Hitz D, Lu W, Feng YC, Zhang WH, Zhang XZ, Zhao HY, Sun LT, Zhao HW. Influence of electron cyclotron resonance ion source parameters on high energy electrons. Rev Sci Instrum 2020; 91:083302. [PMID: 32872961 DOI: 10.1063/5.0011403] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/21/2020] [Accepted: 07/25/2020] [Indexed: 06/11/2023]
Abstract
In order to diagnose the electron cyclotron resonance (ECR) plasma, a high-efficiency collimation system has been developed at the Institute of Modern Physics, and the bremsstrahlung spectra in the range of 10 keV-300 keV were measured on a third generation superconducting ECR ion source, SECRAL-II, with a CdTe detector. Used as a comparative index of the mean energy of the high energy electron population, the spectral temperature, Ts, is derived through a linear fitting of the spectra in a semi-logarithmic representation. The influences of some main source parameters, such as the neutral gas pressure, extraction voltage, microwave power, and bias disk voltage, on the high energy electrons are systemically investigated.
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Affiliation(s)
- J B Li
- Institute of Modern Physics (IMP), Chinese Academy of Sciences, Lanzhou 730000, China
| | - L X Li
- Institute of Modern Physics (IMP), Chinese Academy of Sciences, Lanzhou 730000, China
| | - L B Li
- Institute of Modern Physics (IMP), Chinese Academy of Sciences, Lanzhou 730000, China
| | - J W Guo
- Institute of Modern Physics (IMP), Chinese Academy of Sciences, Lanzhou 730000, China
| | - D Hitz
- Institute of Modern Physics (IMP), Chinese Academy of Sciences, Lanzhou 730000, China
| | - W Lu
- Institute of Modern Physics (IMP), Chinese Academy of Sciences, Lanzhou 730000, China
| | - Y C Feng
- Institute of Modern Physics (IMP), Chinese Academy of Sciences, Lanzhou 730000, China
| | - W H Zhang
- Institute of Modern Physics (IMP), Chinese Academy of Sciences, Lanzhou 730000, China
| | - X Z Zhang
- Institute of Modern Physics (IMP), Chinese Academy of Sciences, Lanzhou 730000, China
| | - H Y Zhao
- Institute of Modern Physics (IMP), Chinese Academy of Sciences, Lanzhou 730000, China
| | - L T Sun
- Institute of Modern Physics (IMP), Chinese Academy of Sciences, Lanzhou 730000, China
| | - H W Zhao
- Institute of Modern Physics (IMP), Chinese Academy of Sciences, Lanzhou 730000, China
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Sun L, Zhao HW, Zhao HY, Lu W, Guo JW, Cao Y, Wu Q, Qian C, Yang Y, Fang X, Zhang ZM, Zhang XZ, Guo XH, Liu ZW. Overview of high intensity ion source development in the past 20 years at IMP. Rev Sci Instrum 2020; 91:023310. [PMID: 32113417 DOI: 10.1063/1.5129399] [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] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Accepted: 01/20/2020] [Indexed: 06/10/2023]
Abstract
Ion source development over the last 20 years at the IMP is reviewed. For versatile purposes, several types of ion sources have been involved in the research and development work at the IMP, i.e., the highly charged ECR (Electron Cyclotron Resonance) ion source, intense microwave ion source or the 2.45 GHz intense beam ECR ion source, and laser ion source (LIS). In the development of ECR ion sources, SECRAL (Superconducting ECR ion source with Advanced design in Lanzhou), Lanzhou ECR ion source, and Lanzhou all permanent magnet ECR ion source series have been made, which can cover the operation microwave frequency range of 10-28 GHz. The LIS with an Nd:YAG laser with a maximum output energy of 8 J in 8 ns pulse duration has been developed for very intense short pulse ion beams from solid materials such as C, Ti, Ni, Ag, and so on. Microwave ion sources have been built to produce intense pulsed or direct current beams from several mA to 100 mA for either high intensity accelerators or applications. This paper will give an overview of the high intensity ion source development at the IMP, especially on the recent progress and new results, such as the status of the fourth generation ECR ion source (first fourth generation ECR ion source), the production of recorded highly charged ion beams with SECRAL sources, key technology research studies, and so on.
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Affiliation(s)
- L Sun
- Institute of Modern Physics (IMP), Chinese Academy of Sciences (CAS), Lanzhou 730000, China
| | - H W Zhao
- Institute of Modern Physics (IMP), Chinese Academy of Sciences (CAS), Lanzhou 730000, China
| | - H Y Zhao
- Institute of Modern Physics (IMP), Chinese Academy of Sciences (CAS), Lanzhou 730000, China
| | - W Lu
- Institute of Modern Physics (IMP), Chinese Academy of Sciences (CAS), Lanzhou 730000, China
| | - J W Guo
- Institute of Modern Physics (IMP), Chinese Academy of Sciences (CAS), Lanzhou 730000, China
| | - Y Cao
- Institute of Modern Physics (IMP), Chinese Academy of Sciences (CAS), Lanzhou 730000, China
| | - Q Wu
- Institute of Modern Physics (IMP), Chinese Academy of Sciences (CAS), Lanzhou 730000, China
| | - C Qian
- Institute of Modern Physics (IMP), Chinese Academy of Sciences (CAS), Lanzhou 730000, China
| | - Y Yang
- Institute of Modern Physics (IMP), Chinese Academy of Sciences (CAS), Lanzhou 730000, China
| | - X Fang
- Institute of Modern Physics (IMP), Chinese Academy of Sciences (CAS), Lanzhou 730000, China
| | - Z M Zhang
- Institute of Modern Physics (IMP), Chinese Academy of Sciences (CAS), Lanzhou 730000, China
| | - X Z Zhang
- Institute of Modern Physics (IMP), Chinese Academy of Sciences (CAS), Lanzhou 730000, China
| | - X H Guo
- Institute of Modern Physics (IMP), Chinese Academy of Sciences (CAS), Lanzhou 730000, China
| | - Z W Liu
- Institute of Modern Physics (IMP), Chinese Academy of Sciences (CAS), Lanzhou 730000, China
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10
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Qian C, Sun LT, Jia ZH, Li LB, Ma YM, Fang X, Guo JW, Wang H, Lu W, Zhang XZ, Zhao HW. A new room temperature LECR5 ion source for the SESRI project. Rev Sci Instrum 2020; 91:023313. [PMID: 32113446 DOI: 10.1063/1.5128514] [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] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Accepted: 01/23/2020] [Indexed: 06/10/2023]
Abstract
The Space Environment Simulation and Research Infrastructure project, which uses various ion beams as irradiated materials in life science research, is being built at the Harbin Institute of Technology. A new room temperature electron cyclotron resonance ion source, the Lanzhou Electron Cyclotron Resonance Ion Source No. 5 (LECR5), has been designed and constructed. It is an intense, highly charged, heavy ion beam injector which generates ion beams from H to Bi, typically ∼50 eμA 209Bi32+. The LECR5 is designed to operate at microwave frequencies in the range of 14.5-18 GHz. The typical magnetic parameters are designed based on those optimized for SECRAL, which operates at 18 GHz. This paper presents the LECR5 ion source, its test bench, and the preliminary beam results.
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Affiliation(s)
- C Qian
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - L T Sun
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Z H Jia
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - L B Li
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Y M Ma
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - X Fang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - J W Guo
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - H Wang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - W Lu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - X Z Zhang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - H W Zhao
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
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Guo JW, Sun L, Lu W, Zhang WH, Feng YC, Shen Z, Li LX, Li JB, Zhang XZ, Hitz D, Zhao HW. A new microwave coupling scheme for high intensity highly charged ion beam production by high power 24-28 GHz SECRAL ion source. Rev Sci Instrum 2020; 91:013322. [PMID: 32012624 DOI: 10.1063/1.5131101] [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] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Accepted: 12/31/2019] [Indexed: 06/10/2023]
Abstract
The efficiency of the microwave-plasma coupling is a key issue to enhance the performance of electron cyclotron resonance ion sources (ECRISs) in terms of higher ion beam intensity yield. The coupling properties are affected by the microwave coupling scheme, especially for the high frequency (f > 20 GHz) and high power (P > 5 kW) ECR ion sources. Based on the study of 24 GHz SECRAL ion source performances working at different launching systems, a new microwave coupling scheme, called the Vlasov launcher, is proposed, which can not only realize efficient power matching and feeding but also enhance the microwave power distribution on the ECR surface. The first promising results are presented in this article. Then, a prototype dedicated to the next generation ECRIS is described.
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Affiliation(s)
- J W Guo
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - L Sun
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - W Lu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - W H Zhang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Y C Feng
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Z Shen
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - L X Li
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - J B Li
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - X Z Zhang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - D Hitz
- Visiting Scientist at Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - H W Zhao
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
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Luo ZZ, Sun HM, Guo JW, Luo P, Hu CQ, Huang W, Shu H. Molecular characterization of a RNA polymerase (RNAP) II (DNA directed) polypeptide H (POLR2H) in Pacific white shrimp (Litopenaeus vannamei) and its role in response to high-pH stress. Fish Shellfish Immunol 2020; 96:245-253. [PMID: 31830564 DOI: 10.1016/j.fsi.2019.12.012] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Revised: 11/26/2019] [Accepted: 12/08/2019] [Indexed: 06/10/2023]
Abstract
RNA polymerase (RNAP) II (DNA-directed) (POLR2) genes are essential for cell viability under environmental stress and for the transfer of biological information from DNA to RNA. However, the function and characteristics of POLR2 genes in crustaceans are still unknown. In the present study, a POLR2H cDNA was isolated from Pacific white shrimp (Litopenaeus vannamei) and designated as Lv-POLR2H. The full-length Lv-POLR2H cDNA is 772 bp in length and contains a 32-bp 5'- untranslated region (UTR), a 284-bp 3'- UTR with a poly (A) sequence, and an open reading frame (ORF) of 456 bp encoding an Lv-POLR2H protein of 151 amino acids with a deduced molecular weight of 17.21 kDa. The Lv-POLR2H protein only contains one functional domain, harbors no transmembrane domains and mainly locates in the nucleus. The expression of the Lv-POLR2H mRNA was ubiquitously detected in all selected tissues, with the highest level in the gills. In situ hybridization (ISH) analysis showed that Lv-POLR2H was mainly located in the secondary gill filaments, the transcript levels of Lv-POLR2H in the gills were found to be significantly affected after challenge by pH, low salinity and high concentrations of NO2- and NH4+, indicating that Lv-POLR2H in gill tissues might play roles under various physical stresses. Specifically, under high-pH stress, knockdown of Lv-POLR2H via siRNA significantly decreased the survival rate of the shrimp, indicating its key roles in the response to high-pH stress. Our study may provide the first evidence of the role of POLR2H in shrimp responding to high-pH stress and provides new insight into molecular regulation in response to high pH in crustaceans.
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Affiliation(s)
- Zhi-Zhan Luo
- School of Life Science/School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China; Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China
| | - Hui-Ming Sun
- School of Life Science/School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Jing-Wen Guo
- School of Life Science/School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China
| | - Peng Luo
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB)/Guangdong Provincial Key Laboratory of Applied Marine Biology (LAMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; Institution of South China Sea Ecology and Environmental Engineering (ISEE), Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Chao-Qun Hu
- CAS Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB)/Guangdong Provincial Key Laboratory of Applied Marine Biology (LAMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; Institution of South China Sea Ecology and Environmental Engineering (ISEE), Chinese Academy of Sciences, Guangzhou, 510301, China
| | - Wen Huang
- Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China; CAS Key Laboratory of Tropical Marine Bio-resources and Ecology (LMB)/Guangdong Provincial Key Laboratory of Applied Marine Biology (LAMB), South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, 510301, China; Institution of South China Sea Ecology and Environmental Engineering (ISEE), Chinese Academy of Sciences, Guangzhou, 510301, China.
| | - Hu Shu
- School of Life Science/School of Environmental Science and Engineering, Guangzhou University, Guangzhou, 510006, China.
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Li JQ, Cao Y, Sun LT, Zhang XZ, Guo JW, Fang X, Wang H, Zhao HW. Intense carbon beams production with an all permanent magnet electron cyclotron resonance ion source for heavy ion medical machine. Rev Sci Instrum 2020; 91:013307. [PMID: 32012517 DOI: 10.1063/1.5128488] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Accepted: 12/20/2019] [Indexed: 06/10/2023]
Abstract
LAPECR3 (Lanzhou All Permanent magnet Electron cyclotron Resonance ion source No. 3) had been developed as an ion injector of Heavy Ion Medical Machine (HIMM) accelerator facility since 2009. The first HIMM accelerator facility was built in Wuwei city in 2015, and the LAPCER3 ion source has delivered C5+ ion beam to HIMM for more than 1000 days in the past four years. In order to improve the performance of the LAPECR3 ion source for intense carbon beams production, continuous research and development work has been made. The recently developed LAPECR3 ion source together with the new low-energy beam transportation can provide better performance in terms of both beam intensity and quality. This paper will generally review the LAPECR3 ion source operation status for HIMM, and the recent improvement will be presented, especially the stable beams production of C4+ and C5+.
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Affiliation(s)
- J Q Li
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - Y Cao
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - L T Sun
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - X Z Zhang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - J W Guo
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - X Fang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - H Wang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
| | - H W Zhao
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
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14
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Lu W, Sun LT, Qian C, Li LB, Guo JW, Huang W, Zhang XZ, Zhao HW. Production of intense uranium beams with inductive heating oven at Institute of Modern Physics. Rev Sci Instrum 2019; 90:113318. [PMID: 31779405 DOI: 10.1063/1.5128419] [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] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Accepted: 10/26/2019] [Indexed: 06/10/2023]
Abstract
HIAF (High Intensity heavy ion Accelerator Facility) is a new accelerator complex under construction at the Institute of Modern Physics. As the main injector of this project, the high-charge-state ECR ion source needs to provide intense uranium beams, such as 700 eμA of U35+. This requires the performance of metal ovens to be further improved so that the crucible can operate at an ultrahigh temperature for a long time without damage in a high magnetic field (>3 T). In order to meet these requirements, an inductive oven with special thermal shielding and support has been developed in the past two years. The off-line test result has shown that this oven can reach up to 2000 °C with ∼1.2 kW of heating power. After ∼5 days of continuous running on the SECRAL-II platform, the tantalum crucible survived. In this contribution, we will discuss the structure of this inductive oven and analyze the test results as well.
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Affiliation(s)
- W Lu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - L T Sun
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - C Qian
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - L B Li
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - J W Guo
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - W Huang
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - X Z Zhang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - H W Zhao
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
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15
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Zheng XJ, Liu XZ, Kou JQ, Sun YL, Liu XY, Guo JW, Wang T. [Resection of lumbar nerve sheath tumors via muscle-pedicle open-door laminoplasty approach]. Zhonghua Yi Xue Za Zhi 2019; 99:3000-3004. [PMID: 31607032 DOI: 10.3760/cma.j.issn.0376-2491.2019.38.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To evaluate the efficacy and safety of resection of lumbar nerve sheath tumors via muscle-pedicle open-door laminoplasty approach. Methods: From March 2016 to June 2018, 6 patients (4 males and 2 females, average age (45±14) years) with lumbar spinal nerve sheath tumors received surgical treatment via muscle-pedicleopen-door laminoplasty approach in the Department of Spinal Surgery, the Affiliated Hospital of Qingdao University. The operation time, blood loss, cerebral spinal fluid (CSF) leakage, and pre- and post-operative Oswestry Disability Index (ODI) and low back and leg pain visual analogue scale (VAS) were recorded for all patients. Cobb angle of lumbar lordosis was measured on the standing lateral X-ray before and 6 months after surgery. Bone fusion was observed in computed tomography at six months after surgery. Results: Total tumor resection was achieved in all the 6 patients. The operation time was from 76 to 117 minutes (average, (102±15) minutes). The blood loss was from 160 to 280 ml (average, (256±24) ml). No CSF leakage was observed in this cohort.All patients were followed up for more than 6 months. ODI and VAS for low back and leg pain were much better at one month after operation than those before the operation(t=7.70, 8.63,11.31, all P<0.05). The Cobb angle of lumbar lordosis before operation and at six months after the operation were comparable in all six patients(t=0.70, P>0.05). Bone fusion was observed in computed tomography at six months after surgery. No bone necrosis or absorption, no lamina dislodgement or spinal stenosis was occurred. Conclusions: The muscle-pedicle open-door laminoplasty approach is proved effective and safe to incise nerve sheath tumors in the lumbar spine. Some blood supply of lamina can be kept intact to accelerate bone fusion.
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Affiliation(s)
- X J Zheng
- Department of Spinal Surgery, the Affiliated Hospital of Qingdao University, Qingdao 266330, China
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Meng M, Li XC, Guo JW, Zhou M, Niu LN, Tay FR, He L, Zhang SF. Improving the wear performance of feldspathic veneering porcelain by ion-exchange strengthening. J Dent 2019; 90:103210. [PMID: 31600535 DOI: 10.1016/j.jdent.2019.103210] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2019] [Revised: 09/28/2019] [Accepted: 10/04/2019] [Indexed: 02/04/2023] Open
Abstract
OBJECTIVES The present study examined the effects of Na+→K+ ion-exchange on the wear performance of feldspathic veneering porcelain. METHODS Bar and disk specimens were prepared using IPS classic as the feldspathic veneering porcelain. After ion-exchange by immersion of the specimens in melted KNO3 at two temperatures for different time-periods, the bars were tested for flexural strength and Vickers surface hardness. The disks were paired with zirconia antagonists and tested with a pin-on-disk tribometer with 10 N for 70☓104 wear cycles in artificial saliva. Wear analysis of the porcelain and zirconia was performed using 3D profilometer and analysed with one-way analysis of variance and Tukey's post-hoc pairwise comparison procedures. Worn surfaces were examined with scanning electron microscopy. RESULTS The feldspathic veneering porcelain exhibited strong time-dependent wear behaviour, with typical running-in and steady wear stages. Ion-exchange treatments at 380 °C and 440 °C both enhanced the mechanical properties, decreased the wear rates of running-in wear and steady wear. The wear performance of porcelain treated by ion-exchange at lower temperature (380 °C) was improved significantly, especially reducing the wear rate of the running-in stage. CONCLUSION A thicker ion-exchange layer with less stress relaxation may be obtained by ion-exchange at lower exchange temperature for a long processing time. Such a protocol improves the wear performance of the porcelain effectively. CLINICAL SIGNIFICANCE Restorations with veneering porcelain may fail prematurely due to excessive wear. It important to improve the wear performance of the porcelain. Ion-exchange has the potential to strengthen dental veneering porcelain. Understanding the effect of ion-exchange on the wear performance of porcelain provides insight improving the wear performance of these restorations.
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Affiliation(s)
- M Meng
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, Fourth Military Medical University, Xi'an, 710032, China
| | - X C Li
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China
| | - J W Guo
- Department of Prosthodontics, Guanghua School of Stomatology & Hospital of Stomatology, Guangdong Key Laboratory of Stomatology, Sun Yat-Sen University, Guangzhou, 510055, China
| | - M Zhou
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, Fourth Military Medical University, Xi'an, 710032, China
| | - L N Niu
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, Fourth Military Medical University, Xi'an, 710032, China
| | - F R Tay
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, Fourth Military Medical University, Xi'an, 710032, China; The Dental College of Georgia, Augusta University, Augusta, GA, USA.
| | - L He
- State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an, 710049, China.
| | - S F Zhang
- State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Department of Prosthodontics, School of Stomatology, Fourth Military Medical University, Xi'an, 710032, China.
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17
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Zheng YJ, Li X, Sun L, Guo JW. [Therapeutic effect of dihydroartemisinin on pulmonary fibrosis in rats with dust]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2019; 37:96-103. [PMID: 30929348 DOI: 10.3760/cma.j.issn.1001-9391.2019.02.003] [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 observe the therapeutic effect of dihydroartemisinin on pulmonary fibrosis in rats exposed to dust, and compare the therapeutic effects of dihydroartemisinin and tetrandrine. Methods: Sixty male Sprague-Dawley rats were randomly divided into control group, model group, treatment group 1 and treatment group 2, with 15 rats in each group. The model group and the treatment group were stained with disposable non-exposure silica tracheal instillation method. The drug was administered on the second day after the dust was applied. The treatment group was given with dihydroartemisinin 75 mg/kg, the treatment group was given tetrahexine 22 mg/kg, model group and control group were intragastrically administered with 1 ml of normal saline per 100 g of body mass. The drug was administered for 6 days per week for 28 days. Rats were sacrificed on the 7th, 14th and 28th day after dusting, and the lung tissues of rats were taken, detection of rat lung coefficient, ELISA was used to detect transforming growth factor-1(TGF-1)and Smad 2/3 in rat lung tissues, type I collagen (Col-I) expression level, pathological changes of rat lung tissue, immunohistochemical observation of rat lung tissue TGF-1 and Col-I protein expression. Statistial analysis was proformed with SPSS 19.0. The mean cornparis between graups wad perfomed using a completely randonized one-way (ANOVA). Results: The expressions of TGF-1, Smad 2/3 and Col-I in the lung tissue of the treatment group were significantly lower than those in the model group (P< 0.05), but the difference between the treatment group 1 and the treatment group 2 Not statistically significant (P>0.05). The results of immunohistochemistry showed that the TGF-1 and Col-I proteins in the interstitial of the model group showed strong positive expression. The expression of TGF-1 and Col-I protein in the lung interstitial of the treated group was weaker than that of the model group. Conclusion: Dihydroartemisinin can down-regulate the level of inflammatory cytokines in rat lung tissue. It is possible to inhibit pulmonary fibrosis by intervening in the TGF-β1/Smad 2/3 signaling pathway, but the therapeutic effect between DHA and tetrandrine is not significantly different in a short time.
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Affiliation(s)
- Y J Zheng
- School of Medicine and Life Science, Universicy of Jinan-Shandong Academy of Medicine Sciences, Jinan 250062, China; Shandong Academy of Medical Sciences Shandong Academy of Occupational Health and Occupational Medicine, Jinan 250062, China
| | - X Li
- Shandong Academy of Medical Sciences Shandong Academy of Occupational Health and Occupational Medicine, Jinan 250062, China
| | - L Sun
- School of Medicine and Life Science, Universicy of Jinan-Shandong Academy of Medicine Sciences, Jinan 250062, China; Shandong Academy of Medical Sciences Shandong Academy of Occupational Health and Occupational Medicine, Jinan 250062, China
| | - J W Guo
- School of Medicine and Life Science, Universicy of Jinan-Shandong Academy of Medicine Sciences, Jinan 250062, China; Shandong Academy of Medical Sciences Shandong Academy of Occupational Health and Occupational Medicine, Jinan 250062, China
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Cheng RY, Yao JR, Wan Q, Guo JW, Pu FF, Shi L, Hu W, Yang YH, Li L, Li M, He F. Oral administration of Bifidobacterium bifidum TMC3115 to neonatal mice may alleviate IgE-mediated allergic risk in adulthood. Benef Microbes 2018; 9:815-828. [PMID: 29888657 DOI: 10.3920/bm2018.0005] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
This study aimed to demonstrate whether exposure to bifidobacteria during early life influences immunity and alleviates the risk of immunoglobulin E (IgE)-mediated allergies in adulthood. BALB/c neonatal mice (n=54) were administered with a lyophilised cell preparation of Bifidobacterium bifidum TMC3115 (TMC3115) for 3 weeks. Following the intervention, the mice were immunised with intraperitoneal ovalbumin (OVA). The morphology and function of the intestinal epithelium were determined using histopathological examinations. Intestinal microbiota was detected using quantitative PCR and characterised using next-generation sequencing of 16S rRNA genes from faecal DNA. Caecal short-chain fatty acids (SCFAs) were measured using gas chromatography-mass spectrometry. Serum levels of tumour necrosis factor (TNF)-α, interleukin (IL)-6, IL-10, and immunoglobulin E (IgE) and the percentage of splenic CD4+ T cells were examined using enzyme-linked immunosorbent assay and flow cytometry, respectively. TMC3115 did not significantly affect body weight, and cause any severe systemic inflammation or other clinical symptoms among the neonatal or adult mice, although the crypt depths and Muc2-positive cells in some intestinal segments of neonatal mice were significantly lower than control. Oral TMC3115 administration significantly increased faecal microbial diversity, relative abundance of Bacteroidetes and caecal SCFAs production in neonatal mice. Following the intervention, neonatal mice treated with TMC3115 exhibited less increase in serum IgE levels induced by OVA in adults and significantly higher TNF-α and IL-10 levels than in control. Our findings indicate that the oral administration of bifidobacteria, particularly certain strains, such as TMC3115, during early life could alleviate the risk of IgE-mediated allergies in adult host animals. Modifications of intestinal microbiota, SCFAs metabolism and anti-inflammatory cytokine IL-10 production by bifidobacteria may at least in part be a key mechanism underlying the effect of bifidobacteria on the IgE-mediated immune sensitivity of hosts to attacks by allergens at both neonatal and adult stages.
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Affiliation(s)
- R Y Cheng
- 1 Department of Nutrition, Food Hygiene and Toxicology, West China School of Public Health, Sichuan University and Healthy Food Evaluation Research Center, Chengdu 610041, Sichuan, China P.R
| | - J R Yao
- 2 West China Second University Hospital/Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, Sichuan University, Chengdu 610041, Sichuan, China P.R
| | - Q Wan
- 1 Department of Nutrition, Food Hygiene and Toxicology, West China School of Public Health, Sichuan University and Healthy Food Evaluation Research Center, Chengdu 610041, Sichuan, China P.R
| | - J W Guo
- 1 Department of Nutrition, Food Hygiene and Toxicology, West China School of Public Health, Sichuan University and Healthy Food Evaluation Research Center, Chengdu 610041, Sichuan, China P.R
| | - F F Pu
- 1 Department of Nutrition, Food Hygiene and Toxicology, West China School of Public Health, Sichuan University and Healthy Food Evaluation Research Center, Chengdu 610041, Sichuan, China P.R
| | - L Shi
- 3 Department of Clinical Nutrition, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, China P.R
| | - W Hu
- 3 Department of Clinical Nutrition, West China Hospital, Sichuan University, Chengdu 610041, Sichuan, China P.R
| | - Y H Yang
- 4 Department of Planning, Hebei Inatural Biotech Co., Ltd. Shijiazhuang 050000, Hebei, China P.R
| | - L Li
- 5 Department of Research and Development, Hebei Inatural Biotech Co., Ltd. Shijiazhuang 050000, Hebei, China P.R
| | - M Li
- 1 Department of Nutrition, Food Hygiene and Toxicology, West China School of Public Health, Sichuan University and Healthy Food Evaluation Research Center, Chengdu 610041, Sichuan, China P.R
| | - F He
- 1 Department of Nutrition, Food Hygiene and Toxicology, West China School of Public Health, Sichuan University and Healthy Food Evaluation Research Center, Chengdu 610041, Sichuan, China P.R
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Zhao HW, Sun LT, Guo JW, Zhang WH, Lu W, Wu W, Wu BM, Sabbi G, Juchno M, Hafalia A, Ravaioli E, Xie DZ. Superconducting ECR ion source: From 24-28 GHz SECRAL to 45 GHz fourth generation ECR. Rev Sci Instrum 2018; 89:052301. [PMID: 29864795 DOI: 10.1063/1.5017479] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
The development of superconducting ECR source with higher magnetic fields and higher microwave frequency is the most straight forward path to achieve higher beam intensity and higher charge state performance. SECRAL, a superconducting third generation ECR ion source, is designed for 24-28 GHz microwave frequency operation with an innovative magnet configuration of sextupole coils located outside the three solenoids. SECRAL at 24 GHz has already produced a number of record beam intensities, such as 40Ar12+ 1.4 emA, 129Xe26+ 1.1 emA, 129Xe30+ 0.36 emA, and 209Bi31+ 0.68 emA. SECRAL-II, an upgraded version of SECRAL, was built successfully in less than 3 years and has recently been commissioned at full power of a 28 GHz gyrotron and three-frequency heating (28 + 45 + 18 GHz). New record beam intensities for highly charged ion production have been achieved, such as 620 eμA 40Ar16+, 15 eμA 40Ar18+, 146 eμA 86Kr28+, 0.5 eμA 86Kr33+, 53 eμA 129Xe38+, and 17 eμA 129Xe42+. Recent beam test results at SECRAL and SECRAL II have demonstrated that the production of more intense highly charged heavy ion beams needs higher microwave power and higher frequency, as the scaling law predicted. A 45 GHz superconducting ECR ion source FECR (a first fourth generation ECR ion source) is being built at IMP. FECR will be the world's first Nb3Sn superconducting-magnet-based ECR ion source with 6.5 T axial mirror field, 3.5 T sextupole field on the plasma chamber inner wall, and 20 kW at a 45 GHz microwave coupling system. This paper will focus on SECRAL performance studies at 24-28 GHz and technical design of 45 GHz FECR, which demonstrates a technical path for highly charged ion beam production from 24 to 28 GHz SECRAL to 45 GHz FECR.
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Affiliation(s)
- H W Zhao
- Institute of Modern Physics (IMP), CAS, Lanzhou 730000, China
| | - L T Sun
- Institute of Modern Physics (IMP), CAS, Lanzhou 730000, China
| | - J W Guo
- Institute of Modern Physics (IMP), CAS, Lanzhou 730000, China
| | - W H Zhang
- Institute of Modern Physics (IMP), CAS, Lanzhou 730000, China
| | - W Lu
- Institute of Modern Physics (IMP), CAS, Lanzhou 730000, China
| | - W Wu
- Institute of Modern Physics (IMP), CAS, Lanzhou 730000, China
| | - B M Wu
- Institute of Modern Physics (IMP), CAS, Lanzhou 730000, China
| | - G Sabbi
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - M Juchno
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - A Hafalia
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - E Ravaioli
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
| | - D Z Xie
- Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
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Wei X, Yang Y, Jiang YJ, Lei JM, Guo JW, Xiao H. Relaxin ameliorates high glucose-induced cardiomyocyte hypertrophy and apoptosis via the Notch1 pathway. Exp Ther Med 2017; 15:691-698. [PMID: 29399073 PMCID: PMC5772593 DOI: 10.3892/etm.2017.5448] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [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: 04/11/2017] [Accepted: 08/21/2017] [Indexed: 12/14/2022] Open
Abstract
The present study aimed to investigate the role of relaxin (RLX) on high glucose (HG)-induced cardiomyocyte hypertrophy and apoptosis, as well as the possible molecular mechanism. H9c2 cells were exposed to 33 mmol/l HG with or without RLX (100 nmol/ml). Cell viability, apoptosis, oxidative stress, cell hypertrophy and the levels of Notch1, hairy and enhancer of split 1 (hes1), atrial natriuretic polypeptide (ANP), brain natriuretic peptide (BNP), manganese superoxide dismutase (MnSOD), cytochrome C and caspase-3 were assessed in cardiomyocytes. Compared with the HG group, the viability of H9c2 cells was increased by RLX in a time- and dose-dependent manner, and was accompanied with a significant reduction in apoptosis. Furthermore, RLX significantly suppressed the formation of reactive oxygen species and malondialdehyde, and enhanced the activity of SOD. In addition, the levels of ANP, BNP, cytochrome C and caspase-3 were increased and Notch1, hes1 and MnSOD were inhibited in the HG group compared with those in the normal group. However, the Notch inhibitor DAPT almost abolished the protective effects of RLX. These results suggested that RLX protected cardiomyocytes from HG-induced hypertrophy and apoptosis partly through a Notch1-dependent pathway, which may be associated with reducing oxidative stress.
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Affiliation(s)
- Xiao Wei
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Yuan Yang
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Yin-Jiu Jiang
- Department of Thoracic Surgery, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Jian-Ming Lei
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Jing-Wen Guo
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
| | - Hua Xiao
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing 400016, P.R. China
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21
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Guo JW, Guan PP, Ding WY, Wang SL, Huang XS, Wang ZY, Wang P. Erythrocyte membrane-encapsulated celecoxib improves the cognitive decline of Alzheimer's disease by concurrently inducing neurogenesis and reducing apoptosis in APP/PS1 transgenic mice. Biomaterials 2017; 145:106-127. [PMID: 28865290 DOI: 10.1016/j.biomaterials.2017.07.023] [Citation(s) in RCA: 62] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Revised: 07/11/2017] [Accepted: 07/12/2017] [Indexed: 12/16/2022]
Abstract
Alzheimer's disease (AD) is characterized by the loss of neurogenesis and excessive induction of apoptosis. The induction of neurogenesis and inhibition of apoptosis may be a promising therapeutic approach to combating the disease. Celecoxib (CB), a cyclooxygenase-2 specific inhibitor, could offer neuroprotection. Specifically, the CB-encapsulated erythrocyte membranes (CB-RBCMs) sustained the release of CB over a period of 72 h in vitro and exhibited high brain biodistribution efficiency following intranasal administration, which resulted in the clearance of aggregated β-amyloid proteins (Aβ) in neurons. The high accumulation of the CB-RBCMs in neurons resulted in a decrease in the neurotoxicity of CB and an increase in the migratory activity of neurons, and alleviated cognitive decline in APP/PS1 transgenic (Tg) mice. Indeed, COX-2 metabolic products including prostaglandin E2 (PGE2) and PGD2, PGE2 induced neurogenesis by enhancing the expression of SOD2 and 14-3-3ζ, and PGD2 stimulated apoptosis by increasing the expression of BIK and decreasing the expression of ARRB1. To this end, the CB-RBCMs achieved better effects on concurrently increasing neurogenesis and decreasing apoptosis than the phospholipid membrane-encapsulated CB liposomes (CB-PSPD-LPs), which are critical for the development and progression of AD. Therefore, CB-RBCMs provide a rational design to treat AD by promoting the self-repairing capacity of the brain.
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Affiliation(s)
- Jing-Wen Guo
- College of Life and Health Sciences, Northeastern University, Shenyang, 110819, PR China
| | - Pei-Pei Guan
- College of Life and Health Sciences, Northeastern University, Shenyang, 110819, PR China
| | - Wei-Yan Ding
- College of Life and Health Sciences, Northeastern University, Shenyang, 110819, PR China
| | - Si-Ling Wang
- Department of Pharmaceutics, School of Pharmacy, Shenyang Pharmaceutical University, 103 Wenhua Road, Shenyang, Liaoning Province, 110016, PR China
| | - Xue-Shi Huang
- College of Life and Health Sciences, Northeastern University, Shenyang, 110819, PR China
| | - Zhan-You Wang
- College of Life and Health Sciences, Northeastern University, Shenyang, 110819, PR China.
| | - Pu Wang
- College of Life and Health Sciences, Northeastern University, Shenyang, 110819, PR China.
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22
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Li X, Xiang ZP, Chen WQ, Huang QL, Liu TG, Li Q, Zhong SF, Zhang M, Guo JW, Lei L, Luo PG. Reevaluation of Two Quantitative Trait Loci for Type II Resistance to Fusarium Head Blight in Wheat Germplasm PI 672538. Phytopathology 2017; 107:92-99. [PMID: 27571309 DOI: 10.1094/phyto-04-16-0170-r] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Fusarium head blight (FHB), mainly caused by Fusarium graminearum, is a destructive disease in wheat. A population consisting of 229 F2 and F2:3 plants derived from the cross PI 672538 × L661 was used to evaluate the reactions to FHB. The FHB resistance data distribution in the F2 population indicates that some quantitative trait loci (QTLs) were controlling the FHB resistance in PI 672538. We further detected two major QTLs (Qfhs-2B, Qfhs-3B) from analysis of the resistance data and the PCR-amplified results using WinQTLCart 2.5 software. Qfhs-2B, flanked by Xbarc55-2B and Xbarc1155-2B, explained more than 11.6% of the phenotypic variation of the percentage of diseased spikelets (PDS), and Qfhs-3B, flanked by Xwmc54-3B and Xgwm566-3B, explained more than 10% of the PDS phenotypic variation in the F2:3 population. In addition, Qfhs-3B was different from Fhb1 in terms of the pedigree, inheritance, resistance response, chromosomal location, and marker diagnosis. We also detected QTLs for other disease resistance indices, including the percentage of damaged kernels and 1,000-grain weight, in similar chromosomal regions. Therefore, the FHB resistance of PI 672538 was mainly controlled by two major QTLs, mapped on 2B (FhbL693a) and 3B (FhbL693b). PI 672538 could be a useful germplasm for improving wheat FHB resistance.
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Affiliation(s)
- X Li
- First, second, fourth, sixth, seventh, eighth, ninth, and eleventh authors: State Key Laboratory of Plant Breeding and Genetics, Sichuan Agricultural University, Chengdu, Sichuan 611130, China; first, third, fifth, and eleventh authors: State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100193, China; second author: College of Food Science and Technology, Sichuan Tourism University, Chengdu, Sichuan 610100, China; sixth author: Department of Biology and Chemistry, Chongqing Industry and Trade Polytechnic Institute, Fuling District of Chongqing 408000, China; and tenth author: Department of Plant Pathology, Kansas State University, Manhattan 66506
| | - Z P Xiang
- First, second, fourth, sixth, seventh, eighth, ninth, and eleventh authors: State Key Laboratory of Plant Breeding and Genetics, Sichuan Agricultural University, Chengdu, Sichuan 611130, China; first, third, fifth, and eleventh authors: State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100193, China; second author: College of Food Science and Technology, Sichuan Tourism University, Chengdu, Sichuan 610100, China; sixth author: Department of Biology and Chemistry, Chongqing Industry and Trade Polytechnic Institute, Fuling District of Chongqing 408000, China; and tenth author: Department of Plant Pathology, Kansas State University, Manhattan 66506
| | - W Q Chen
- First, second, fourth, sixth, seventh, eighth, ninth, and eleventh authors: State Key Laboratory of Plant Breeding and Genetics, Sichuan Agricultural University, Chengdu, Sichuan 611130, China; first, third, fifth, and eleventh authors: State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100193, China; second author: College of Food Science and Technology, Sichuan Tourism University, Chengdu, Sichuan 610100, China; sixth author: Department of Biology and Chemistry, Chongqing Industry and Trade Polytechnic Institute, Fuling District of Chongqing 408000, China; and tenth author: Department of Plant Pathology, Kansas State University, Manhattan 66506
| | - Q L Huang
- First, second, fourth, sixth, seventh, eighth, ninth, and eleventh authors: State Key Laboratory of Plant Breeding and Genetics, Sichuan Agricultural University, Chengdu, Sichuan 611130, China; first, third, fifth, and eleventh authors: State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100193, China; second author: College of Food Science and Technology, Sichuan Tourism University, Chengdu, Sichuan 610100, China; sixth author: Department of Biology and Chemistry, Chongqing Industry and Trade Polytechnic Institute, Fuling District of Chongqing 408000, China; and tenth author: Department of Plant Pathology, Kansas State University, Manhattan 66506
| | - T G Liu
- First, second, fourth, sixth, seventh, eighth, ninth, and eleventh authors: State Key Laboratory of Plant Breeding and Genetics, Sichuan Agricultural University, Chengdu, Sichuan 611130, China; first, third, fifth, and eleventh authors: State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100193, China; second author: College of Food Science and Technology, Sichuan Tourism University, Chengdu, Sichuan 610100, China; sixth author: Department of Biology and Chemistry, Chongqing Industry and Trade Polytechnic Institute, Fuling District of Chongqing 408000, China; and tenth author: Department of Plant Pathology, Kansas State University, Manhattan 66506
| | - Q Li
- First, second, fourth, sixth, seventh, eighth, ninth, and eleventh authors: State Key Laboratory of Plant Breeding and Genetics, Sichuan Agricultural University, Chengdu, Sichuan 611130, China; first, third, fifth, and eleventh authors: State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100193, China; second author: College of Food Science and Technology, Sichuan Tourism University, Chengdu, Sichuan 610100, China; sixth author: Department of Biology and Chemistry, Chongqing Industry and Trade Polytechnic Institute, Fuling District of Chongqing 408000, China; and tenth author: Department of Plant Pathology, Kansas State University, Manhattan 66506
| | - S F Zhong
- First, second, fourth, sixth, seventh, eighth, ninth, and eleventh authors: State Key Laboratory of Plant Breeding and Genetics, Sichuan Agricultural University, Chengdu, Sichuan 611130, China; first, third, fifth, and eleventh authors: State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100193, China; second author: College of Food Science and Technology, Sichuan Tourism University, Chengdu, Sichuan 610100, China; sixth author: Department of Biology and Chemistry, Chongqing Industry and Trade Polytechnic Institute, Fuling District of Chongqing 408000, China; and tenth author: Department of Plant Pathology, Kansas State University, Manhattan 66506
| | - M Zhang
- First, second, fourth, sixth, seventh, eighth, ninth, and eleventh authors: State Key Laboratory of Plant Breeding and Genetics, Sichuan Agricultural University, Chengdu, Sichuan 611130, China; first, third, fifth, and eleventh authors: State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100193, China; second author: College of Food Science and Technology, Sichuan Tourism University, Chengdu, Sichuan 610100, China; sixth author: Department of Biology and Chemistry, Chongqing Industry and Trade Polytechnic Institute, Fuling District of Chongqing 408000, China; and tenth author: Department of Plant Pathology, Kansas State University, Manhattan 66506
| | - J W Guo
- First, second, fourth, sixth, seventh, eighth, ninth, and eleventh authors: State Key Laboratory of Plant Breeding and Genetics, Sichuan Agricultural University, Chengdu, Sichuan 611130, China; first, third, fifth, and eleventh authors: State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100193, China; second author: College of Food Science and Technology, Sichuan Tourism University, Chengdu, Sichuan 610100, China; sixth author: Department of Biology and Chemistry, Chongqing Industry and Trade Polytechnic Institute, Fuling District of Chongqing 408000, China; and tenth author: Department of Plant Pathology, Kansas State University, Manhattan 66506
| | - L Lei
- First, second, fourth, sixth, seventh, eighth, ninth, and eleventh authors: State Key Laboratory of Plant Breeding and Genetics, Sichuan Agricultural University, Chengdu, Sichuan 611130, China; first, third, fifth, and eleventh authors: State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100193, China; second author: College of Food Science and Technology, Sichuan Tourism University, Chengdu, Sichuan 610100, China; sixth author: Department of Biology and Chemistry, Chongqing Industry and Trade Polytechnic Institute, Fuling District of Chongqing 408000, China; and tenth author: Department of Plant Pathology, Kansas State University, Manhattan 66506
| | - P G Luo
- First, second, fourth, sixth, seventh, eighth, ninth, and eleventh authors: State Key Laboratory of Plant Breeding and Genetics, Sichuan Agricultural University, Chengdu, Sichuan 611130, China; first, third, fifth, and eleventh authors: State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences (CAAS), Beijing 100193, China; second author: College of Food Science and Technology, Sichuan Tourism University, Chengdu, Sichuan 610100, China; sixth author: Department of Biology and Chemistry, Chongqing Industry and Trade Polytechnic Institute, Fuling District of Chongqing 408000, China; and tenth author: Department of Plant Pathology, Kansas State University, Manhattan 66506
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23
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Sun L, Guo JW, Lu W, Zhang WH, Feng YC, Yang Y, Qian C, Fang X, Ma HY, Zhang XZ, Zhao HW. Advancement of highly charged ion beam production by superconducting ECR ion source SECRAL (invited). Rev Sci Instrum 2016; 87:02A707. [PMID: 26931925 DOI: 10.1063/1.4933123] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
At Institute of Modern Physics (IMP), Chinese Academy of Sciences (CAS), the superconducting Electron Cyclotron Resonance (ECR) ion source SECRAL (Superconducting ECR ion source with Advanced design in Lanzhou) has been put into operation for about 10 years now. It has been the main working horse to deliver intense highly charged heavy ion beams for the accelerators. Since its first plasma at 18 GHz, R&D work towards more intense highly charged ion beam production as well as the beam quality investigation has never been stopped. When SECRAL was upgraded to its typical operation frequency 24 GHz, it had already showed its promising capacity of very intense highly charged ion beam production. And it has also provided the strong experimental support for the so called scaling laws of microwave frequency effect. However, compared to the microwave power heating efficiency at 18 GHz, 24 GHz microwave heating does not show the ω(2) scale at the same power level, which indicates that microwave power coupling at gyrotron frequency needs better understanding. In this paper, after a review of the operation status of SECRAL with regard to the beam availability and stability, the recent study of the extracted ion beam transverse coupling issues will be discussed, and the test results of the both TE01 and HE11 modes will be presented. A general comparison of the performance working with the two injection modes will be given, and a preliminary analysis will be introduced. The latest results of the production of very intense highly charged ion beams, such as 1.42 emA Ar(12+), 0.92 emA Xe(27+), and so on, will be presented.
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Affiliation(s)
- L Sun
- Institute of Modern Physics, CAS, Lanzhou 730000, China
| | - J W Guo
- Institute of Modern Physics, CAS, Lanzhou 730000, China
| | - W Lu
- Institute of Modern Physics, CAS, Lanzhou 730000, China
| | - W H Zhang
- Institute of Modern Physics, CAS, Lanzhou 730000, China
| | - Y C Feng
- Institute of Modern Physics, CAS, Lanzhou 730000, China
| | - Y Yang
- Institute of Modern Physics, CAS, Lanzhou 730000, China
| | - C Qian
- Institute of Modern Physics, CAS, Lanzhou 730000, China
| | - X Fang
- Institute of Modern Physics, CAS, Lanzhou 730000, China
| | - H Y Ma
- Institute of Modern Physics, CAS, Lanzhou 730000, China
| | - X Z Zhang
- Institute of Modern Physics, CAS, Lanzhou 730000, China
| | - H W Zhao
- Institute of Modern Physics, CAS, Lanzhou 730000, China
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24
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Lu W, Qian C, Sun LT, Zhang XZ, Fang X, Guo JW, Yang Y, Feng YC, Ma BH, Xiong B, Ruan L, Zhao HW, Zhan WL, Xie D. High intensity high charge state ion beam production with an evaporative cooling magnet ECRIS. Rev Sci Instrum 2016; 87:02A738. [PMID: 26931956 DOI: 10.1063/1.4936183] [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] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
LECR4 (Lanzhou ECR ion source No. 4) is a room temperature electron cyclotron resonance ion source, designed to produce high current, high charge state ion beams for the SSC-LINAC injector (a new injector for sector separated cyclotron) at the Institute of Modern Physics. LECR4 also serves as a PoP machine for the application of evaporative cooling technology in accelerator field. To achieve those goals, LECR4 ECR ion source has been optimized for the operation at 18 GHz. During 2014, LECR4 ion source was commissioned at 18 GHz microwave of 1.6 kW. To further study the influence of injection stage to the production of medium and high charge state ion beams, in March 2015, the injection stage with pumping system was installed, and some optimum results were produced, such as 560 eμA of O(7+), 620 eμA of Ar(11+), 430 eμA of Ar(12+), 430 eμA of Xe(20+), and so on. The comparison will be discussed in the paper.
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Affiliation(s)
- W Lu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - C Qian
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - L T Sun
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - X Z Zhang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - X Fang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - J W Guo
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - Y Yang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - Y C Feng
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - B H Ma
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - B Xiong
- Institute of Electrical Engineering, CAS, Beijing 100190, China
| | - L Ruan
- Institute of Electrical Engineering, CAS, Beijing 100190, China
| | - H W Zhao
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - W L Zhan
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - D Xie
- Nuclear Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, USA
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25
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Guo JW, Sun L, Niu XJ, Zhang XZ, Lu W, Zhang WH, Feng YC, Zhao HW. 24 GHz microwave mode converter optimized for superconducting ECR ion source SECRAL. Rev Sci Instrum 2016; 87:02A708. [PMID: 26931926 DOI: 10.1063/1.4933023] [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] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Over-sized round waveguide with a diameter about Ø33.0 mm excited in the TE01 mode has been widely adopted for microwave transmission and coupling to the ECR (Electron Cyclotron Resonance) plasma with the superconducting ECR ion sources operating at 24 or 28 GHz, such as SECRAL and VENUS. In order to study the impact of different microwave modes on ECRH (Electron Cyclotron Resonance Heating) efficiency and especially the production of highly charged ions, a set of compact and efficient TE01-HE11 mode conversion and coupling system applicable to 24 GHz SECRAL whose overall length is 330 mm has been designed, fabricated and tested. Good agreements between off-line tests and calculation results have been achieved, which indicates the TE01-HE11 converter meets the application design. The detailed results of the optimized coupling system will be presented in the paper.
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Affiliation(s)
- J W Guo
- Institute of Modern Physics (IMP), Chinese Academy of Science, Lanzhou 730000, China
| | - L Sun
- Institute of Modern Physics (IMP), Chinese Academy of Science, Lanzhou 730000, China
| | - X J Niu
- University of Electronic Science and Technology of China, Chengdu 610054, China
| | - X Z Zhang
- Institute of Modern Physics (IMP), Chinese Academy of Science, Lanzhou 730000, China
| | - W Lu
- Institute of Modern Physics (IMP), Chinese Academy of Science, Lanzhou 730000, China
| | - W H Zhang
- Institute of Modern Physics (IMP), Chinese Academy of Science, Lanzhou 730000, China
| | - Y C Feng
- Institute of Modern Physics (IMP), Chinese Academy of Science, Lanzhou 730000, China
| | - H W Zhao
- Institute of Modern Physics (IMP), Chinese Academy of Science, Lanzhou 730000, China
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26
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Wang P, Yu X, Guan PP, Guo JW, Wang Y, Zhang Y, Zhao H, Wang ZY. Magnesium ion influx reduces neuroinflammation in Aβ precursor protein/Presenilin 1 transgenic mice by suppressing the expression of interleukin-1β. Cell Mol Immunol 2015; 14:451-464. [PMID: 26549801 DOI: 10.1038/cmi.2015.93] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Revised: 10/02/2015] [Accepted: 10/02/2015] [Indexed: 12/22/2022] Open
Abstract
Alzheimer's disease (AD) has been associated with magnesium ion (Mg2+) deficits and interleukin-1β (IL-1β) elevations in the serum or brains of AD patients. However, the mechanisms regulating IL-1β expression during Mg2+ dyshomeostasis in AD remain unknown. We herein studied the mechanism of IL-1β reduction using a recently developed compound, magnesium-L-threonate (MgT). Using human glioblastoma A172 and mouse brain D1A glial cells as an in vitro model system, we delineated the signaling pathways by which MgT suppressed the expression of IL-1β in glial cells. In detail, we found that MgT incubation stimulated the activity of extracellular signal-regulated protein kinases 1 and 2 (ERK1/2) and peroxisome proliferator-activated receptor gamma (PPARγ) signaling pathways by phosphorylation, which resulted in IL-1β suppression. Simultaneous inhibition of the phosphorylation of ERK1/2 and PPARγ induced IL-1β upregulation in MgT-stimulated glial cells. In accordance with our in vitro data, the intracerebroventricular (i.c.v) injection of MgT into the ventricles of APP/PS1 transgenic mice and treatment of Aβ precursor protein (APP)/PS1 brain slices suppressed the mRNA and protein expression of IL-1β. These in vivo observations were further supported by the oral administration of MgT for 5 months. Importantly, Mg2+ influx into the ventricles of the mice blocked the effects of IL-1β or amyloid β-protein oligomers in the cerebrospinal fluid. This reduced the stimulation of IL-1β expression in the cerebral cortex of APP/PS1 transgenic mice, which potentially contributed to the inhibition of neuroinflammation.
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Affiliation(s)
- Pu Wang
- College of Life and Health Sciences, Northeastern University, Shenyang, P. R. China
| | - Xin Yu
- College of Life and Health Sciences, Northeastern University, Shenyang, P. R. China
| | - Pei-Pei Guan
- College of Life and Health Sciences, Northeastern University, Shenyang, P. R. China
| | - Jing-Wen Guo
- College of Life and Health Sciences, Northeastern University, Shenyang, P. R. China
| | - Yue Wang
- College of Life and Health Sciences, Northeastern University, Shenyang, P. R. China
| | - Yan Zhang
- College of Life and Health Sciences, Northeastern University, Shenyang, P. R. China
| | - Hang Zhao
- College of Life and Health Sciences, Northeastern University, Shenyang, P. R. China
| | - Zhan-You Wang
- College of Life and Health Sciences, Northeastern University, Shenyang, P. R. China
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27
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Yu X, Guan PP, Guo JW, Wang Y, Cao LL, Xu GB, Konstantopoulos K, Wang ZY, Wang P. By suppressing the expression of anterior pharynx-defective-1α and -1β and inhibiting the aggregation of β-amyloid protein, magnesium ions inhibit the cognitive decline of amyloid precursor protein/presenilin 1 transgenic mice. FASEB J 2015; 29:5044-58. [PMID: 26293690 DOI: 10.1096/fj.15-275578] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2015] [Accepted: 08/13/2015] [Indexed: 01/19/2023]
Abstract
Alzheimer's disease (AD) is associated with a magnesium ion (Mg(2+)) deficit in the serum or brain. However, the mechanisms regulating the roles of Mg(2+) in the pathologic condition of AD remain unknown. We studied whether brain Mg(2+) can decrease β-amyloid (Aβ) deposition and ameliorate the cognitive decline in a model of AD, the APPswe/PS1DE9 transgenic (Tg) mouse. We used a recently developed compound, magnesium-L-threonate (MgT), for a treatment that resulted in enhanced clearance of Aβ in an anterior pharynx-defective (APH)-1α/-1β-dependent manner. To further explore how MgT treatment inhibits cognitive decline in APP/PS1 Tg mice, the critical molecules for amyloid precursor protein (APP) cleavage and signaling pathways were investigated. In neurons, ERK1/2 and PPARγ signaling pathways were activated by MgT treatment, which in turn suppressed (by >80%) the expression of APH-1α/-1β, which is responsible for the deposition of Aβ and potentially contributes to the memory deficit that occurs in AD. More important, Aβ oligomers in the cerebrospinal fluid (CSF) further promoted the expression of APH-1α/-1β (by >2.5-fold), which enhances the γ-cleavage of APP and Aβ deposition during AD progression. These findings provide new insights into the mechanisms of AD progression and are instrumental for developing better strategies to combat the disease.
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Affiliation(s)
- Xin Yu
- *College of Life and Health Sciences, Northeastern University, Shenyang, China; and Department of Chemical and Biomolecular Engineering, Department of Biomedical Engineering, Johns Hopkins Institute for NanoBioTechnology, Johns Hopkins Physical Sciences-Oncology Center, and Center of Cancer Nanotechnology Excellence, The Johns Hopkins University, Baltimore, Maryland, USA
| | - Pei-Pei Guan
- *College of Life and Health Sciences, Northeastern University, Shenyang, China; and Department of Chemical and Biomolecular Engineering, Department of Biomedical Engineering, Johns Hopkins Institute for NanoBioTechnology, Johns Hopkins Physical Sciences-Oncology Center, and Center of Cancer Nanotechnology Excellence, The Johns Hopkins University, Baltimore, Maryland, USA
| | - Jing-Wen Guo
- *College of Life and Health Sciences, Northeastern University, Shenyang, China; and Department of Chemical and Biomolecular Engineering, Department of Biomedical Engineering, Johns Hopkins Institute for NanoBioTechnology, Johns Hopkins Physical Sciences-Oncology Center, and Center of Cancer Nanotechnology Excellence, The Johns Hopkins University, Baltimore, Maryland, USA
| | - Yue Wang
- *College of Life and Health Sciences, Northeastern University, Shenyang, China; and Department of Chemical and Biomolecular Engineering, Department of Biomedical Engineering, Johns Hopkins Institute for NanoBioTechnology, Johns Hopkins Physical Sciences-Oncology Center, and Center of Cancer Nanotechnology Excellence, The Johns Hopkins University, Baltimore, Maryland, USA
| | - Long-Long Cao
- *College of Life and Health Sciences, Northeastern University, Shenyang, China; and Department of Chemical and Biomolecular Engineering, Department of Biomedical Engineering, Johns Hopkins Institute for NanoBioTechnology, Johns Hopkins Physical Sciences-Oncology Center, and Center of Cancer Nanotechnology Excellence, The Johns Hopkins University, Baltimore, Maryland, USA
| | - Guo-Biao Xu
- *College of Life and Health Sciences, Northeastern University, Shenyang, China; and Department of Chemical and Biomolecular Engineering, Department of Biomedical Engineering, Johns Hopkins Institute for NanoBioTechnology, Johns Hopkins Physical Sciences-Oncology Center, and Center of Cancer Nanotechnology Excellence, The Johns Hopkins University, Baltimore, Maryland, USA
| | - Konstantinos Konstantopoulos
- *College of Life and Health Sciences, Northeastern University, Shenyang, China; and Department of Chemical and Biomolecular Engineering, Department of Biomedical Engineering, Johns Hopkins Institute for NanoBioTechnology, Johns Hopkins Physical Sciences-Oncology Center, and Center of Cancer Nanotechnology Excellence, The Johns Hopkins University, Baltimore, Maryland, USA
| | - Zhan-You Wang
- *College of Life and Health Sciences, Northeastern University, Shenyang, China; and Department of Chemical and Biomolecular Engineering, Department of Biomedical Engineering, Johns Hopkins Institute for NanoBioTechnology, Johns Hopkins Physical Sciences-Oncology Center, and Center of Cancer Nanotechnology Excellence, The Johns Hopkins University, Baltimore, Maryland, USA
| | - Pu Wang
- *College of Life and Health Sciences, Northeastern University, Shenyang, China; and Department of Chemical and Biomolecular Engineering, Department of Biomedical Engineering, Johns Hopkins Institute for NanoBioTechnology, Johns Hopkins Physical Sciences-Oncology Center, and Center of Cancer Nanotechnology Excellence, The Johns Hopkins University, Baltimore, Maryland, USA
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28
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Guan PP, Guo JW, Yu X, Wang Y, Wang T, Konstantopoulos K, Wang ZY, Wang P. The role of cyclooxygenase-2, interleukin-1β and fibroblast growth factor-2 in the activation of matrix metalloproteinase-1 in sheared-chondrocytes and articular cartilage. Sci Rep 2015; 5:10412. [PMID: 25992485 PMCID: PMC4438667 DOI: 10.1038/srep10412] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [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: 01/23/2015] [Accepted: 04/13/2015] [Indexed: 12/13/2022] Open
Abstract
MMP-1 expression is detected in fluid shear stress (20 dyn/cm2)-activated and osteoarthritic human chondrocytes, however, the precise mechanisms underlying shear-induced MMP-1 synthesis remain unknown. Using primary chondrocytes and T/C-28a2 chondrocytic cells as model systems, we report that prolonged application of high fluid shear to human chondrocytes induced the synthesis of cyclooxygenase-2 (COX-2), interleukin-1β (IL-1β) and fibroblast growth factor-2 (FGF-2), which led to a marked increase in MMP-1 expression. IL-1β, COX-2-dependent PGE2 activated the PI3-K/AKT and p38 signaling pathways, which were in turn responsible for MMP-1 synthesis via NF-κB- and c-Jun-transactivating pathways. Prolonged shear stress exposure (>12 h) induced 15-Deoxy-Δ12,14-prostaglandin J2 (15d-PGJ2) synthesis. Although 15d-PGJ2 suppressed PI3-K/AKT and p38 signaling pathways, it stimulated MMP-1 expression via activating heme oxygenase 1 (HO-1). The critical role of COX-2 in regulating MMP-1 expression in articular cartilage in vivo was demonstrated using COX-2+/− transgenic mice in the absence or presence of rofecoxib oral administration. These findings provide novel insights for developing therapeutic strategies to combat OA.
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Affiliation(s)
- Pei-Pei Guan
- College of Life and Health Sciences, Northeastern University, Shenyang, P. R. China, 110819
| | - Jing-Wen Guo
- College of Life and Health Sciences, Northeastern University, Shenyang, P. R. China, 110819
| | - Xin Yu
- College of Life and Health Sciences, Northeastern University, Shenyang, P. R. China, 110819
| | - Yue Wang
- College of Life and Health Sciences, Northeastern University, Shenyang, P. R. China, 110819
| | - Tao Wang
- College of Life and Health Sciences, Northeastern University, Shenyang, P. R. China, 110819
| | - Konstantinos Konstantopoulos
- 1] Department of Chemical and Biomolecular Engineering [2] Johns Hopkins Institute for NanoBioTechnology [3] Johns Hopkins Physical Sciences-Oncology Center [4] Center of Cancer Nanotechonology Excellence, The Johns Hopkins University, Baltimore, Maryland, United States of America, 21218
| | - Zhan-You Wang
- College of Life and Health Sciences, Northeastern University, Shenyang, P. R. China, 110819
| | - Pu Wang
- College of Life and Health Sciences, Northeastern University, Shenyang, P. R. China, 110819
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29
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Lu W, Sun LT, Qian C, Guo JW, Fang X, Feng YC, Yang Y, Ma HY, Zhang XZ, Ma BH, Xiong B, Guo SQ, Ruan L, Zhao HW. The development of a room temperature electron cyclotron resonance ion source (Lanzhou electron cyclotron resonance ion source No. 4) with evaporative cooling technology at Institute of Modern Physics. Rev Sci Instrum 2015; 86:043301. [PMID: 25933849 DOI: 10.1063/1.4916658] [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] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
LECR4 (Lanzhou electron cyclotron resonance ion source No. 4) has been successfully constructed at IMP and has also been connected with the Low Energy Beam Transport (LEBT) and Radio Frequency Quadrupole (RFQ) systems. These source magnet coils are cooled through evaporative cooling technology, which is the first attempt with an ECR ion source in the world. The maximum mirror field is 2.5 T (with iron plug) and the effective plasma chamber volume is 1.2 l. It was designed to be operated at 18 GHz and aimed to produce intense multiple charge state heavy ion beams for the linear injector project SSC-Linac at IMP. In February 2014, the first analyzed beam at 18 GHz was extracted. During about three months' commissioning, some outstanding results have been achieved, such as 1.97 emA of O(6+), 1.7 emA of Ar(8+), 1.07 emA of Ar(9+), and 118 euA of Bi(28+). The source has also successfully delivered O(5+) and Ar(8+) ion beams for RFQ commissioning in April 2014. This paper will give a brief overview of the design of LECR4. Then, the latest results of this source at 18 GHz will be presented.
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Affiliation(s)
- W Lu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - L T Sun
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - C Qian
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - J W Guo
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - X Fang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - Y C Feng
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - Y Yang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - H Y Ma
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - X Z Zhang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - B H Ma
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
| | - B Xiong
- Institute of Electrical Engineering, CAS, Beijing 100190, China
| | - S Q Guo
- Institute of Electrical Engineering, CAS, Beijing 100190, China
| | - L Ruan
- Institute of Electrical Engineering, CAS, Beijing 100190, China
| | - H W Zhao
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China
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Abstract
The SBP-box gene family is specific to plants and encodes a class of zinc finger-containing transcription factors with a broad range of functions. Although SBP-box genes have been identified in numerous plants, including green algae, moss, silver birch, snapdragon, Arabidopsis, rice, and maize, there is little information concerning SBP-box genes, or the corresponding miR156/157, function in melon. Using the highly conserved sequence of the Arabidopsis thaliana SBP-box domain protein as a probe of information sequence, the genome-wide protein database of melon was explored to obtain 13 SBP-box protein sequences, which were further divided into 4 groups, based on phylogenetic analysis. A further analysis centered on the melon SBP-box genetic family's phylogenetic evolution, sequence similarities, gene structure, and miR156 target sequence was also conducted. Analysis of all the expression patterns of melon SBP-box family genes showed that the SBP-box genes were detected in 7 kinds of tissue, and fruit had the highest expression level. CmSBP11 tends to present its specific expression in melon fruit and root. CmSBP09 expression was the highest in flower. Overall, the molecular evolution and expression pattern of the melon SBP-box gene family, revealed by these results, suggest its function differentiation that followed gene duplication.
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Affiliation(s)
- Y Ma
- Inner Mongolia Key Laboratory of Herbage & Endemic Crop Biotechnology, College of Life Sciences, Inner Mongolia University, Hohhot, China
| | - J W Guo
- Inner Mongolia Key Laboratory of Herbage & Endemic Crop Biotechnology, College of Life Sciences, Inner Mongolia University, Hohhot, China
| | - R Bade
- Inner Mongolia Key Laboratory of Herbage & Endemic Crop Biotechnology, College of Life Sciences, Inner Mongolia University, Hohhot, China
| | - Z H Men
- Department of Biological Science and Technology, Baotou Teacher's College, Baotou, China
| | - A Hasi
- Inner Mongolia Key Laboratory of Herbage & Endemic Crop Biotechnology, College of Life Sciences, Inner Mongolia University, Hohhot, China
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31
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Zhao HW, Lu W, Zhang XZ, Feng YC, Guo JW, Cao Y, Li JY, Guo XH, Sha S, Sun LT, Xie DZ. Performance and operation of advanced superconducting electron cyclotron resonance ion source SECRAL at 24 GHz. Rev Sci Instrum 2012; 83:02A320. [PMID: 22380167 DOI: 10.1063/1.3666913] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
SECRAL (superconducting ECR ion source with advanced design in Lanzhou) ion source has been in routine operation for Heavy Ion Research Facility in Lanzhou (HIRFL) accelerator complex since May 2007. To further enhance the SECRAL performance in order to satisfy the increasing demand for intensive highly charged ion beams, 3-5 kW high power 24 GHz single frequency and 24 GHz +18 GHz double frequency with an aluminum plasma chamber were tested, and some exciting results were produced with quite a few new record highly charged ion beam intensities, such as (129)Xe(35+) of 64 eμA, (129)Xe(42+) of 3 eμA, (209)Bi(41+) of 50 eμA, (209)Bi(50+) of 4.3 eμA and (209)Bi(54+) of 0.2 eμA. In most cases SECRAL is operated at 18 GHz to deliver highly charged heavy ion beams for the HIRFL accelerator, only for those very high charge states and very heavy ion beams such as (209)Bi(36+) and (209)Bi(41+), SECRAL has been operated at 24 GHz. The total operation beam time provided by SECRAL up to July 2011 has exceeded 7720 hours. In this paper, the latest performance, development, and operation status of SECRAL ion source are presented. The latest results and reliable long-term operation for the HIRFL accelerator have demonstrated that SECRAL performance for production of highly charged heavy ion beams remains improving at higher RF power with optimized tuning.
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Affiliation(s)
- H W Zhao
- Institute of Modern Physics (IMP), Chinese Academy of Sciences, Lanzhou 73000, China.
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32
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Lu W, Xie DZ, Zhang XZ, Xiong B, Ruan L, Sha S, Zhang WH, Cao Y, Lin SH, Guo JW, Fang X, Guo XH, Li XX, Ma HY, Yang Y, Wu Q, Zhao HY, Ma BH, Wang H, Zhu YH, Feng YC, Li JY, Li JQ, Sun LT, Zhao HW. Development of DRAGON electron cyclotron resonance ion source at Institute of Modern Physics. Rev Sci Instrum 2012; 83:02A328. [PMID: 22380175 DOI: 10.1063/1.3669800] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A new room temperature electron cyclotron resonance (ECR) ion source, DRAGON, is under construction at IMP. DRAGON is designed to operate at microwaves of frequencies of 14.5-18 GHz. Its axial solenoid coils are cooled with evaporative medium to provide an axial magnetic mirror field of 2.5 T at the injection and 1.4 T at the extraction, respectively. In comparison to other conventional room temperature ECR ion sources, DRAGON has so far the largest bore plasma chamber of inner diameter of 126 mm with maximum radial fields of 1.4-1.5 T produced by a non-Halbach permanent sextupole magnet.
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Affiliation(s)
- W Lu
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China.
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33
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Sha S, Zhao HW, Guo XH, Zhang ZL, Fang X, Guo JW, Zhang WH, Lu W, Cao Y, Ma HY, Lin SH, Li XX, Ma BH, Yang Y, Wang H, Wu Q, Li JY, Feng YC, Zhao HY, Zhu YH, Sun LT, Zhang XZ, Chen XM, Xie DZ. Status of the laser ion source at IMP. Rev Sci Instrum 2012; 83:02B303. [PMID: 22380282 DOI: 10.1063/1.3656391] [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] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A laser (Nd:YAG laser, 3 J, 1064 nm, 8-10 ns) ion source has been built and under development at IMP to provide pulsed high-charge-state heavy ion beams to a radio frequency quadrupole (RFQ) for upgrading the IMP accelerators with a new low-energy beam injector. The laser ion source currently operates in a direct plasma injection scheme to inject the high charge state ions produced from a solid target into the RFQ. The maximum power density on the target was about 8.4 × 10(12) W∕cm(2). The preliminary experimental results will be presented and discussed in this paper.
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Affiliation(s)
- S Sha
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 73000, China.
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34
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Zhang WH, Ma HY, Yang Y, Wu Q, Zhang XZ, Wang H, Ma BH, Feng YC, Fang X, Guo JW, Cao Y, Li XX, Zhu YH, Li JY, Sha S, Lu W, Lin SH, Guo XH, Zhao HY, Sun LT, Xie DZ, Peng SX, Liu ZW, Zhao HW. A 2.45 GHz electron cyclotron resonance proton ion source and a dual-lens low energy beam transport. Rev Sci Instrum 2012; 83:02A329. [PMID: 22380176 DOI: 10.1063/1.3669802] [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] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The structure and preliminary commissioning results of a new 2.45 GHz ECR proton ion source and a dual-lens low energy beam transport (LEBT) system are presented in this paper. The main magnetic field of the ion source is provided by a set of permanent magnets with two small electro-solenoid magnets at the injection and the extraction to fine tune the magnetic field for better microwave coupling. A 50 keV pulsed proton beam extracted by a three-electrode mechanism passes through the LEBT system of length of 1183 mm. This LEBT consists of a diagnosis chamber, two Glaser lenses, two steering magnets, and a final beam defining cone. A set of inner permanent magnetic rings is embedded in each of the two Glaser lenses to produce a flatter axial-field to reduce the lens aberrations.
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Affiliation(s)
- W H Zhang
- Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China.
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35
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Cao Y, Lu W, Zhang WH, Sha S, Yang Y, Ma BH, Wang H, Zhu YH, Guo JW, Fang X, Lin SH, Li XX, Feng YC, Li JY, Zhao HY, Ma HY, Zhang XZ, Guo XH, Wu Q, Sun LT, Zhao HW, Xie DZ. Study of ion beam transport from the SECRAL electron cyclotron resonance ion source at the Institute of Modern Physics. Rev Sci Instrum 2012; 83:02B726. [PMID: 22380331 DOI: 10.1063/1.3680545] [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] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Ion beam transport from the Superconducting Electron Cyclotron Resonance ion source with Advanced design in Lanzhou (SECRAL) electron cyclotron resonance ion source was studied at the Institute of Modern Physics during 2010. Particle-in-cell simulations and experimental results have shown that both space charge and magnetic aberrations lead to a larger beam envelope and emittance growth. In the existing SECRAL extraction beam line, it has been shown that raising the solenoid lens magnetic field reduces aberrations in the subsequent dipole and results in lower emittance. Detailed beam emittance measurements are presented in this paper.
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Affiliation(s)
- Y Cao
- Institute of Modern Physics, CAS, Lanzhou 730000, China.
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36
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Guo JW. Effects of Chinese medicine for regulating sea of blood in brain combined with bone marrow stromal stem cell transplantation on angiogenesis in ischemic brain tissue of rats. ACTA ACUST UNITED AC 2009; 7:763-8. [DOI: 10.3736/jcim20090811] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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37
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Li JF, Guo JW, Huang XF. [Study on the enhancing effect of polyporus polysaccharide, mycobacterium polysaccharide and lentinan on lymphokine-activated killer cell activity in vitro]. Zhongguo Zhong Xi Yi Jie He Za Zhi 1996; 16:224-6. [PMID: 9206247] [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: 02/04/2023]
Abstract
The actions of Polyporus polysaccharide (PPS), mycobacterium polysaccharide (MPS) and lentinan (LEN) on lymphokine-activated killer (LAK) cell activity in vitro were investigated in this study. Human peripheral blood mononuclear cells (PBMC) were cultured for 96 hours with medium containing different concentrations of the above-mentioned drugs in combination with recombinant interleukin 2 (rIL-2). Then cell-mediated lysis was determined by 1H-TdR release assay including NK sensitive and NK resistant target cells. The results demonstrated that, when combined with rIL-2 in a certain concentration, all three kinds of polysaccharides could enhance the LAK activity by 42%-56.9%, and reduce the dose of rIL-2 by 50% (P < 0.05-0.01). It suggested that the PPS, MPS and LEN could be used as bioactivity regulators in LAK cell therapy in tumor treatment.
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Affiliation(s)
- J F Li
- Tangshan People's Hospital, Hebei
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38
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Huang SK, Stauffer PR, Hong K, Guo JW, Phillips TL, Huang A, Papahadjopoulos D. Liposomes and hyperthermia in mice: increased tumor uptake and therapeutic efficacy of doxorubicin in sterically stabilized liposomes. Cancer Res 1994; 54:2186-91. [PMID: 8174126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
We have shown that sterically stabilized (Stealth) liposomes (SL), can accumulate in the extracellular space within tumors, and may improve pharmacokinetics and therapeutic efficacy of encapsulated doxorubicin (SL-DOX). When SL-DOX were incubated in vitro at different temperatures with 50% bovine serum, approximately 20% of the encapsulated DOX was released at 42 degrees C within 1 min, compared with less than 1% DOX released at 37 degrees C. In vivo, mice were implanted s.c. with C-26 colon carcinoma in both flanks to produce matched tumors 6-10 mm in diameter. Topical hyperthermia treatment consisting of 42 degrees C minimum tumor temperature for 30 min was applied with a microwave device to the tumor on one side only at 1 h after i.v. injection of SL-DOX or free DOX. Tumor DOX concentration in the group which was given injections of SL-DOX and sacrificed 2 h after drug injection was 1.5-fold higher compared with the nonheated tumor in mice given injections of SL-DOX. At 24 h after injection the thermal enhancement ratio for DOX accumulation in tumor remained at 1.5. In addition, there was a 15-fold higher concentration of DOX in tumor from the group given injections of SL-DOX compared to mice given injections of free doxorubicin. To assess therapeutic efficacy, we treated mice with hyperthermia for 15 min either at 1, or at 24 h or at both time points after injection of SL-DOX. We have found that the life span of the group of mice treated with SL-DOX and two 15-min hyperthermia treatments increased 51% compared with control groups receiving the same dosage of SL-DOX but without hyperthermia, and 59% compared to those receiving two hyperthermia treatments but with free DOX. A single hyperthermia treatment either at 1 or 24 h was less effective in increasing life span compared with two treatments, but all groups treated with SL-DOX and single hyperthermia were still superior to the control groups, showing a 27-38% increase in life span.
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Affiliation(s)
- S K Huang
- Cancer Research Institute, University of California, San Francisco 94143
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39
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De Vito LD, Mason BP, Jankowska-Gan E, Hogan KT, Guo JW, Lutz CT, Sollinger HW, Burlingham WJ. Epitope fine specificity of human anti-HLA-A2 antibodies. Identification of four epitopes including a haptenlike epitope on HLA-A2 at lysine 127. Hum Immunol 1993; 37:165-77. [PMID: 7503972 DOI: 10.1016/0198-8859(93)90182-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Anti-HLA-A2 CREG antibodies were purified from seven individuals by affinity chromatography. The binding of the purified antibodies to single or multiple amino acid variants of HLA-A2.1 was measured with an inhibition RIA. Substitutions at 10 amino acid residues in the polymorphic alpha 1 and alpha 2 domains were important for human antibody binding; eight of these have previously been shown to be important in the binding of murine anti-HLA-A2 CREG antibodies. Unlike any previously reported murine mAbs, the binding of antibodies from two individuals was eliminated by a substitution at the HLA-A2, -24, -28 shared loop amino acid residue lysine 127. Conversely, when the asparagine at residue 127 on the non-cross-reactive HLA-A3 was replaced with lysine, antibody binding was completely restored. The results further suggest that both lambda- and kappa-containing human antibodies that bind to this region may recognize lysine 127 as a haptenlike epitope. Anti-HLA-A2 antibodies that recognized a conformational epitope defined by changes at glycine 62 in the alpha 1 domain were predominated by lambda light chains whereas those that recognize an epitope defined by a loop residue at tryptophan 107 in the alpha 2 domain were predominated by kappa light chains. The data are consistent with a model of restricted epitope recognition of HLA-A2 by human B cells that is similar to, but distinct from, epitope recognition by mouse B-cell hybridomas, and may help to explain the phenomenon of public or cross-reactive idiotypes in the HLA system.
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Affiliation(s)
- L D De Vito
- Department of Surgery, University of Wisconsin-Madison 53792
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40
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DeVito LD, Hogan KT, Mason BP, Guo JW, Lutz CT, Sollinger HW, Burlingham WJ. Epitope fine specificity of human anti-HLA-A2 antibodies. Transplant Proc 1993; 25:189-90. [PMID: 7679810] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- L D DeVito
- Department of Surgery, University of Wisconsin-Madison 53792
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41
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Katz A, Bargman JM, Miller DC, Guo JW, Ghali VS, Schoeneman MJ. IgA nephritis in HIV-positive patients: a new HIV-associated nephropathy? Clin Nephrol 1992; 38:61-8. [PMID: 1516281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Four HIV-positive patients were shown to have IgA-associated nephritis on biopsy, including one with anaphylactoid purpura. Three were homosexuals, while the fourth acquired the infection from his mother. All had hematuria, a variable degree of proteinuria and renal disease with a benign course. Serologic studies showed elevated levels of IgA as well as IgA immune complexes and rheumatoid factor. IgA antibodies to multiple HIV antigens were detected by Western blot. Pathologic studies showed tubuloreticular inclusions in endothelial cells and nuclear bodies in interstitial cells in all cases. HIV antigens were not detected in kidney biopsies by monoclonal antibodies nor was HIV viral genome demonstrated by in situ hybridization. The possibility that this represents a unique type of IgA-associated HIV nephropathy is discussed.
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Affiliation(s)
- A Katz
- Department of Pathology, Toronto Hospital, Canada
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42
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Zhang XH, Wei SL, Wang FR, Wang JL, Xie TX, Liu DW, Zuo LF, Guo JW. Studies on pathological morphology, clinical features and nuclear DNA contents by flow cytometry in adrenal neoplasms. Chin Med J (Engl) 1992; 105:139-43. [PMID: 1597074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Pathological morphology, clinical features and nuclear DNA contents determined by flow cytometry (FCM) were studied in 11 cases of normal adrenals and 41 cases of adrenal neoplasms. It was found that despite differences in clinical manifestations and in degrees of cellular atypia of the adenomas their DNA contents were the same as in normal adrenals. On the other hand, the pheochromocytomas were benign in nature, but most of them (16/19) showed DNA aneuploidy and the DNA indices were correlated with their clinical and morphological features.
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Affiliation(s)
- X H Zhang
- Department of Pathology, Hebei Medical College, Shijiazhuang
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43
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Hou J, Zuo LF, Liu HX, Li SS, Lin YZ, Wang DZ, Guo JW. [Flow cytometry in analysis of precancerous lesions of the esophagus]. Zhonghua Zhong Liu Za Zhi 1988; 10:105-8. [PMID: 3208646] [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: 01/04/2023]
Abstract
DNA content of the severe dysplasia cells in the esophageal epithelium was quantitatively analysed using flow cytometry and compared with those of the normal, mild dysplasia and cancer cells. The results showed that DNA index of the severe dysplasia cells was 1.27 +/- 0.11 and there was a significant difference between its value and those of the normal (1.0 +/- 0.02), mild dysplasia (1.01 +/- 0.03) and cancer cells (1.73 +/- 0.35). The DNA content of severe dysplasia cells lies between the normal and cancer cells. The hyperplasia degree of the severe dysplasia cells parallels their DNA contents. This study indicates that flow cytometry is a useful supplementary tool for diagnosis of the tumor.
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Affiliation(s)
- J Hou
- Hebei Cancer Institute, Shijiazhuang
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