1
|
Xiong F, Liu X, Zuo C, Zhang X, Yang T, Zhou B, Zhang G, Tan S, An Q, Chu PK. Percolating Network of Anionic Vacancies in Prussian Blue: Origin of Superior Ammonium-Ion Storage Performance. J Phys Chem Lett 2024; 15:1321-1327. [PMID: 38285647 DOI: 10.1021/acs.jpclett.3c03579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2024]
Abstract
Emerging aqueous ammonium-ion batteries (AIBs) are considered inexpensive, highly safe, ecofriendly, and sustainable energy storage systems. Although some high-performance electrode materials have been reported for AIBs, a comprehensive understanding of the origin of the high ammonium-ion storage performance is still lacking. Herein, the percolating network of anionic vacancies is determined to be the origin of the superior ammonium-ion storage properties of the Prussian blue analogues based on ab initio molecular dynamics simulation and electrochemical kinetic analyses. Fe[Fe(CN)6] with a percolating anionic vacancy network delivers an outstanding rate of 64.7 mAh g-1 at 2000 mA g-1 in addition to a capacity retention of 94.5% after 10 000 cycles. The low-strain intercalation ammonium-ion storage mechanism of highly deficient Fe Prussian blue with Fe as the redox center is revealed by in situ X-ray diffraction and ex situ X-ray absorption fine structure analysis. The results provide insights into the mechanism of ammonium-ion storage in Prussian blue analogues and guidance in the development of aqueous AIBs.
Collapse
Affiliation(s)
- Fangyu Xiong
- College of Materials Science and Engineering, Chongqing University, Chongqing 400030, China
| | - Xiaolin Liu
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China
| | - Chunli Zuo
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China
| | - Xiaolin Zhang
- Department of Physics, Department of Materials Science and Engineering, and Department of Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong 999077, China
| | - Tao Yang
- Centre for Mechanical Technology and Automation, Department of Mechanical Engineering, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Binbin Zhou
- Shenzhen Institute of Advanced Electronic Materials, Shenzhen Institute of Advanced Technology, Chinese Academy of Sciences, Shenzhen 518055, China
| | - Guobin Zhang
- Future Technology School, Shenzhen Technology University, Shenzhen 518055, China
| | - Shuangshuang Tan
- College of Materials Science and Engineering, Chongqing University, Chongqing 400030, China
| | - Qinyou An
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, P. R. China
| | - Paul K Chu
- Department of Physics, Department of Materials Science and Engineering, and Department of Biomedical Engineering, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong 999077, China
| |
Collapse
|
2
|
Meng R, Zhai ZP, Zuo C, Wang WN. Analysis of risk factors for complications following transurethral resection of the prostate. Eur Rev Med Pharmacol Sci 2024; 28:1464-1470. [PMID: 38436180 DOI: 10.26355/eurrev_202402_35476] [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: 03/05/2024]
Abstract
OBJECTIVE This study investigates the risk factors for complications following transurethral resection of the prostate and provides a reference for reducing postoperative complications. PATIENTS AND METHODS A retrospective analysis was conducted on 322 patients with benign prostatic hyperplasia who underwent transurethral resection of the prostate from April 2015 to January 2022. Among them, 214 patients had complete clinical and follow-up data. Clinical and follow-up data were collected, and both univariate and multivariate logistic regression analyses were performed to identify factors influencing the occurrence of postoperation transurethral resection of the prostate complications. RESULTS The incidence of complications after transurethral resection of the prostate was 19.16% (41/214). Among them, the incidence of Grade I-II complications was 14.96% (32/214), and Grade III-IV complications were 4.2% (9/214). The preoperative Quality of Life score (p<0.001) was identified as an independent risk factor for the occurrence of Grade I-II complications after transurethral resection of the prostate. The International Prostate Symptom Score (p=0.006) was identified as an independent risk factor for the occurrence of Grade III-IV complications after transurethral resection of the prostate. CONCLUSIONS The preoperative Quality of Life score is an independent risk factor for the occurrence of Grade I-II complications after transurethral resection of the prostate. The International Prostate Symptom Score is an independent risk factor for the occurrence of Grade III-IV complications after transurethral resection of the prostate.
Collapse
Affiliation(s)
- R Meng
- Department of Urology, YuQuan Hospital, Tsinghua University, Beijing, China.
| | | | | | | |
Collapse
|
3
|
Li M, Wang X, Meng J, Zuo C, Wu B, Li C, Sun W, Mai L. Comprehensive Understandings of Hydrogen Bond Chemistry in Aqueous Batteries. Adv Mater 2024; 36:e2308628. [PMID: 37910810 DOI: 10.1002/adma.202308628] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2023] [Revised: 10/17/2023] [Indexed: 11/03/2023]
Abstract
Aqueous batteries are emerging as highly promising contenders for large-scale grid energy storage because of uncomplicated assembly, exceptional safety, and cost-effectiveness. The unique aqueous electrolyte with a rich hydrogen bond (HB) environment inevitably has a significant impact on the electrode materials and electrochemical processes. While numerous reviews have focused on the materials design and assembly of aqueous batteries, the utilization of HB chemistry is overlooked. Herein, instead of merely compiling recent advancements, this review presents a comprehensive summary and analysis of the profound implication exerted by HB on all components of the aqueous batteries. Intricate links between the novel HB chemistry and various aqueous batteries are ingeniously constructed within the critical aspects, such as self-discharge, structural stability of electrode materials, pulverization, solvation structures, charge carrier diffusion, corrosion reactions, pH sensitivity, water splitting, polysulfides shuttle, and H2 S evolution. By adopting a vantage point that encompasses material design, binder and separator functionalization, electrolyte regulation, and HB optimization, a critical examination of the key factors that impede electrochemical performance in diverse aqueous batteries is conducted. Finally, insights are rendered properly based on HB chemistry, with the aim of propelling the advancement of state-of-the-art aqueous batteries.
Collapse
Affiliation(s)
- Ming Li
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, China
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 611731, China
| | - Xuanpeng Wang
- Department of Physical Science & Technology, School of Science, Wuhan University of Technology, Wuhan, 430070, P. R. China
- Hubei Longzhong Laboratory, Wuhan University of Technology (Xiangyang Demonstration Zone), Xiangyang, Hubei, 441000, China
| | - Jiashen Meng
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, China
| | - Chunli Zuo
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, China
| | - Buke Wu
- Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen, 518055, China
| | - Cong Li
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, China
| | - Wei Sun
- School of Materials and Energy, University of Electronic Science and Technology of China, Chengdu, 611731, China
| | - Liqiang Mai
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, China
- Hubei Longzhong Laboratory, Wuhan University of Technology (Xiangyang Demonstration Zone), Xiangyang, Hubei, 441000, China
| |
Collapse
|
4
|
Liu HL, Gao WZ, Han YJ, Gao ZH, Diao MX, Zuo C, Zhang MH, Diao YZ, Wang CJ, Gu YM, Wang B. Analysis of risk factors for stone remnants and recurrence after lateral decubitus percutaneous nephrolithotomy. Eur Rev Med Pharmacol Sci 2023; 27:11913-11922. [PMID: 38164855 DOI: 10.26355/eurrev_202312_34790] [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: 01/03/2024]
Abstract
OBJECTIVE This study aims to explore the risk factors for stone remnants and recurrence after lateral decubitus percutaneous nephrolithotomy (PCNL), providing insights to enhance the stone-free rate and reduce the stone recurrence rate. PATIENTS AND METHODS A retrospective analysis was conducted on 356 patients with renal or upper ureteral stones who underwent lateral decubitus PCNL from January 2015 to August 2022. Among them, 271 patients had complete clinical and follow-up data. General clinical information, perioperative data, and follow-up data were collected. Univariate and multivariate logistic regression analyses were performed to identify risk factors for stone remnants and recurrence after lateral decubitus PCNL. RESULTS The stone-free rate after lateral decubitus PCNL was 88.6% (195/271), and the stone recurrence rate within three years was 28.1% (76/271). Stone size (p<0.001) and stone co-infection (p=0.047) were identified as independent risk factors for stone remnants after lateral decubitus PCNL. Multiple stones (p=0.003) were an independent risk factor for stone recurrence after lateral decubitus PCNL. CONCLUSIONS Stone size and stone co-infection are independent risk factors for stone remnants after lateral decubitus PCNL. Multiple stones are an independent risk factor for stone recurrence after lateral decubitus PCNL.
Collapse
Affiliation(s)
- H-L Liu
- Department of Urology, Peking University First Hospital, Miyun Hospital, Beijing, China.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
5
|
Zuo C, Yang KL, Li ZC, Gu YM, Diao YZ, Meng XB, Meng YS, Zhang K. ["Double Grooves-Double Rings" technique of transurethral Thulium laser enucleation of the prostate: learning curve of single surgeon]. Zhonghua Yi Xue Za Zhi 2023; 103:1563-1567. [PMID: 37246007 DOI: 10.3760/cma.j.cn112137-20230212-00198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Objective: To evaluate the learning curve of the "Double Grooves-Double Rings" (DGDR) technique of transurethral Thulium laser enucleation of the prostate (ThuLEP) for benign prostatic hyperplasia (BPH) by a single surgeon. From June 2021 to July 2022, 84 patients mean age (69.0±8.0) years,preoperative prostate volume (90.9±40.3)ml with BPH underwent ThuLEP in the Department of Urology, Peking University First Hospital.Performed by a single surgeon who had no experience of transurethral resection of prostate (TURP) and any laser surgeries. The case scatter plots with the best fitting line were drawn to analyze the learning curve. According to the date of the surgeries, the patients were equally divided into three learning stages (28 patients for each group). The T-PSA,prostate volume,operative time,enucleation time, enucleation efficiency,catheter indwelling time, hemoglobin drop and perioperative complications (including re-TURP, blood transfusion, stress incontinence≥3 months and urethral stricture) were compared among the groups. The learning curve was divided into three stages, and the cutting point was shown on the 14th case. Except the prostate volume [stage1 (75.7±30.7) ml, stage2 (93.40±39.6)ml, stage3 (103.5±46.2) ml, P<0.05], there was no significant difference of the baseline data between three groups (P>0.05). Compared with those of stage 1(100.6±24.7) min,(0.55±0.22) g/min, a statistically significant improvement was observed in both of the operative time and the enucleation efficiency among stage 2[(84.5±36.6) min, (0.87±0.33) g/min and stage 3 (71.2±26.3) min, (1.27±0.45) g/min, P<0.05]. The learning curve of the DGDR technique for ThuLEP can be divided into three stages. A ThuLEP beginner can preliminarily master this technique after completing 14 cases.
Collapse
Affiliation(s)
- C Zuo
- Department of Urology,Peking University First Hospital,Beijing 100034,China Department of Urology, Beijing Miyun District Hospital,Beijing 101500,China
| | - K L Yang
- Department of Urology,Peking University First Hospital,Beijing 100034,China
| | - Z C Li
- Department of Urology,Peking University First Hospital,Beijing 100034,China
| | - Y M Gu
- Department of Urology, Beijing Miyun District Hospital,Beijing 101500,China
| | - Y Z Diao
- Department of Urology, Beijing Miyun District Hospital,Beijing 101500,China
| | - X B Meng
- Department of Urology, Beijing Miyun District Hospital,Beijing 101500,China
| | - Y S Meng
- Department of Urology,Peking University First Hospital,Beijing 100034,China
| | - K Zhang
- Department of Urology,Peking University First Hospital,Beijing 100034,China
| |
Collapse
|
6
|
Wang T, Wang Q, Pan G, Jia G, Li X, Wang C, Zhang L, Zuo C. ASIC1a involves the acid-mediated activation of pancreatic stellate cells associated with autophagy induction. Physiol Res 2023; 72:49-57. [PMID: 36545882 PMCID: PMC10069816 DOI: 10.33549/physiolres.934950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/24/2023] Open
Abstract
The acidic tumor microenvironment (TME) of pancreatic cancer affects the physiological function of pancreatic stellate cells (PSCs), which in turn promotes cancer progression. Acid-sensing ion channel 1a (ASIC1a) is responsible for acidosis-related physiopathological processes. In this study, we investigated the effect of acid exposure on the activation and autophagy of PSCs, and the role of ASIC1a in these events. The results showed that acidic medium upregulated the expression of ASIC1a, induced PSCs activation and autophagy, which can be suppressed by inhibiting ASIC1a using PcTx1 or ASIC1a knockdown, suggesting that ASIC1a involves these two processes. In addition, the acid-induced activation of PSCs was impaired after the application of autophagy inhibitor alone or in combination with ASIC1a siRNA, meaning a connection between autophagy and activation. Collectively, our study provides evidence for the involvement of ASIC1a in the acid-caused PSCs activation, which may be associated with autophagy induction.
Collapse
Affiliation(s)
- T Wang
- Department of Nuclear Medicine, Changhai Hospital, Naval Medical University, Shanghai, China. , Department of Marine Biomedicine and Polar Medicine, Naval Special Medical Center, Naval Medical University, Shanghai, China.
| | | | | | | | | | | | | | | |
Collapse
|
7
|
Tang H, Chao F, Chen H, Jia R, Luo H, Xiong F, Yao X, Zhang W, Zuo C, Wang J, Luo P, An Q. Water-Lubricated Aluminum Vanadate for Enhanced Rechargeable Magnesium Ion Storage. Small 2022; 18:e2203525. [PMID: 36026562 DOI: 10.1002/smll.202203525] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2022] [Revised: 08/02/2022] [Indexed: 06/15/2023]
Abstract
Magnesium ion batteries (MIBs) have attracted much attention due to their low cost and high safety properties. However, the intense charge repulsion effect and sluggish diffusion dynamics of Mg2+ ions result in unsatisfactory electrochemical performance of conventional cathode materials in MIBs. This work reports water-lubricated aluminum vanadate (HAlVO) as high-performance cathode material for Mg2+ ions storage and investigates the capacity fade mechanism of water-free aluminum vanadate (AlVO). The charge density difference based on density functional theory calculation is performed to analyze the charge transfer process of water-lubricated/free aluminum vanadates (HAlVO/AlVO). The different charge transfer phenomena of two materials and the charge shielding effect of water molecule in HAlVO are revealed. Moreover, the single-phase structural evolution process and the Mg2+ ions storage mechanism of HAlVO are further investigated deeply by different in situ and ex situ characterization methods. This work proves that HAlVO is a potential candidate cathode material to satisfy the high-performance reversible Mg2+ ions storage, and the water-lubricated method is an effective strategy to improve the electrochemical performance of vanadium oxides cathode.
Collapse
Affiliation(s)
- Han Tang
- Hubei Engineering Laboratory of Automotive Lightweight Materials and Processing, New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, Hubei Provincial Key Laboratory of Green Materials for Light Industry, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, 430068, P. R. China
| | - Feiyang Chao
- Hubei Engineering Laboratory of Automotive Lightweight Materials and Processing, New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, Hubei Provincial Key Laboratory of Green Materials for Light Industry, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, 430068, P. R. China
| | - Huibiao Chen
- Hubei Engineering Laboratory of Automotive Lightweight Materials and Processing, New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, Hubei Provincial Key Laboratory of Green Materials for Light Industry, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, 430068, P. R. China
| | - Runmin Jia
- Hubei Engineering Laboratory of Automotive Lightweight Materials and Processing, New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, Hubei Provincial Key Laboratory of Green Materials for Light Industry, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, 430068, P. R. China
| | - Hongyu Luo
- Hubei Engineering Laboratory of Automotive Lightweight Materials and Processing, New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, Hubei Provincial Key Laboratory of Green Materials for Light Industry, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, 430068, P. R. China
| | - Fangyu Xiong
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Xuhui Yao
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Wenwei Zhang
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Chunli Zuo
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China
| | - Juan Wang
- Hubei Engineering Laboratory of Automotive Lightweight Materials and Processing, New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, Hubei Provincial Key Laboratory of Green Materials for Light Industry, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, 430068, P. R. China
| | - Ping Luo
- Hubei Engineering Laboratory of Automotive Lightweight Materials and Processing, New Materials and Green Manufacturing Talent Introduction and Innovation Demonstration Base, Hubei Provincial Key Laboratory of Green Materials for Light Industry, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, 430068, P. R. China
| | - Qinyou An
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P. R. China
- Foshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory, Foshan, Guangdong, 528200, P. R. China
| |
Collapse
|
8
|
Luo P, Tang W, Cai W, Yang J, Zhang W, Zuo C, Liu G, Xiao Y, Dong S. Charged-optimized ZnO/ ZnV2O4 composite hollow microspheres robust zinc-ion storage capacity. J SOLID STATE CHEM 2021. [DOI: 10.1016/j.jssc.2021.122371] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
|
9
|
Liu G, Xiao Y, Zhang W, Tang W, Zuo C, Zhang P, Dong S, Luo P. Novel aluminum vanadate as a cathode material for high-performance aqueous zinc-ion batteries. Nanotechnology 2021; 32:315405. [PMID: 33906187 DOI: 10.1088/1361-6528/abfc0d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Accepted: 04/26/2021] [Indexed: 06/12/2023]
Abstract
Rechargeable aqueous zinc-ion batteries (AZIBs) have garnered widespread attention as a new large-scale energy storage candidate owing to their low cost and high theoretical capacity. Because of the unique divalent state of Zn2+and the existence of a strong electrostatic repulsion phenomenon, researchers are currently focusing on how to prepare high-performance cathode materials. In this study, we synthesized aluminum vanadate (AlV3O9) as a cathode material for AZIBs using a solvothermal method. Al3+acted as a pillar in the resultant structure and stabilized it. Furthermore, this large interlayer spacing enhanced the ion diffusion coefficient and accelerated the ion transport process. Because of these advantages, the AlV3O9(AVO) cathode exhibited excellent electrochemical performance, including a high capacity of 421.0 mA h g-1at 0.1 A g-1and a stable rate capability of 348.2 mA h g-1at 1 A g-1. Moreover, it exhibited a specific capacity of 202 mA h g-1even at a high current density of 3 A g-1(the capacity retention rate reached 84.38% after 1600 cycles). The prepared ZIBs presented a high power density of 366.6 W kg-1at an energy density of 286 W h kg-1. These extraordinary results indicate the great application potential of AVO as a cathode material for AZIBs.
Collapse
Affiliation(s)
- Gangyuan Liu
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light-Weight Materials and Processing, School of Materials and Chemical Engineering Hubei University of Technology Wuhan 430068, People's Republic of China
| | - Yao Xiao
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light-Weight Materials and Processing, School of Materials and Chemical Engineering Hubei University of Technology Wuhan 430068, People's Republic of China
| | - Wenwei Zhang
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light-Weight Materials and Processing, School of Materials and Chemical Engineering Hubei University of Technology Wuhan 430068, People's Republic of China
| | - Wen Tang
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light-Weight Materials and Processing, School of Materials and Chemical Engineering Hubei University of Technology Wuhan 430068, People's Republic of China
| | - Chunli Zuo
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light-Weight Materials and Processing, School of Materials and Chemical Engineering Hubei University of Technology Wuhan 430068, People's Republic of China
| | - Peiping Zhang
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light-Weight Materials and Processing, School of Materials and Chemical Engineering Hubei University of Technology Wuhan 430068, People's Republic of China
| | - Shijie Dong
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light-Weight Materials and Processing, School of Materials and Chemical Engineering Hubei University of Technology Wuhan 430068, People's Republic of China
- Wuhan Polytechnic University Wuhan 430205, People's Republic of China
| | - Ping Luo
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, Collaborative Innovation Center of Green Light-Weight Materials and Processing, School of Materials and Chemical Engineering Hubei University of Technology Wuhan 430068, People's Republic of China
| |
Collapse
|
10
|
Zuo C, Xiao Y, Pan X, Xiong F, Zhang W, Long J, Dong S, An Q, Luo P. Organic-Inorganic Superlattices of Vanadium Oxide@Polyaniline for High-Performance Magnesium-Ion Batteries. ChemSusChem 2021; 14:2093-2099. [PMID: 33751834 DOI: 10.1002/cssc.202100263] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/04/2021] [Revised: 03/09/2021] [Indexed: 05/13/2023]
Abstract
Rechargeable magnesium batteries (RMBs) have attracted significant attention owing to the high energy density and economic viability. However, the lack of suitable cathode materials, owing to the high polarizability of divalent Mg-ion and slow Mg-ion diffusion, hinders the development of RMBs. V2 O5 is a promising RMBs cathode material, but its limited interlayer spacing is unfavorable for the rapid diffusion of Mg2+ , demonstrating unsatisfactory electrochemical performance. In this study, the superlattices of V2 O5 and polyaniline (PANI) with expanded interlayer spacing are assembled as the cathode material for RMBs. The intercalation of PANI in the interlayer region of V2 O5 significantly improves the reversible capacities, Mg2+ diffusion kinetics, and cycling performance of the PVO cathode. Furthermore, RMBs with PVO as the cathode and Mg metal as the anode deliver high specific capacities. The introduced polyaniline layer not only expands the interlayer spacing of V2 O5 , but also increases the electrical conductivity. Moreover, ex situ XRD characterization indicates that PVO does not undergo obvious phase transformation with the continuous insertion of Mg2+ , which may be ascribed to the π-conjugated chains of PANI that give flexibility to the structure to improve cycling stability. This study demonstrates that designing organic-inorganic superlattices is an efficient strategy for developing high-performance cathode materials for RMBs.
Collapse
Affiliation(s)
- Chunli Zuo
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, 430068, P.R. China
| | - Yao Xiao
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, 430068, P.R. China
| | - Xiaoji Pan
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, 430068, P.R. China
| | - Fangyu Xiong
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P.R. China
| | - Wenwei Zhang
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, 430068, P.R. China
| | - Juncai Long
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P.R. China
| | - Shijie Dong
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, 430068, P.R. China
- Wuhan Polytechnic University, Wuhan, 430023, P.R. China
| | - Qinyou An
- State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan, 430070, P.R. China
- Foshan Xianhu Laboratory of Advanced Energy Science and Technology, Guangdong Laboratory, Guangdong, Foshan, 528200, P.R. China
| | - Ping Luo
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, 430068, P.R. China
| |
Collapse
|
11
|
Zhang W, Xiao Y, Zuo C, Tang W, Liu G, Wang S, Cai W, Dong S, Luo P. Adjusting the Valence State of Vanadium in VO 2 (B) by Extracting Oxygen Anions for High-Performance Aqueous Zinc-Ion Batteries. ChemSusChem 2021; 14:971-978. [PMID: 33289309 DOI: 10.1002/cssc.202002401] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 12/06/2020] [Indexed: 06/12/2023]
Abstract
VO2 generally has a higher theoretical capacity and layered structure suitable for the intercalation/extraction of zinc ions. However, Zn2+ ions with high charge density interact with the crystal lattice and limit further improvement in electrochemical performance. Defect engineering is a potential modification method with very promising application prospects, but the established procedures for preparing defects are complicated. In this study, VO2-x (B) with oxygen deficiency is prepared by a simple solution reaction with NaBH4 . The presence of oxygen deficiencies is confirmed by positron annihilation lifetime spectroscopy, UV/Vis absorbance spectroscopy and others. Owing to the presence of oxygen defects, the aqueous Zn/VO2-x (B) battery exhibits improved specific capacity, excellent reversibility, and structural stability. Ex situ characterization techniques are employed to demonstrate the reversible insertion-extraction mechanism of Zn2+ ions from and into the host material. In addition, the Zn/VO2-x (B) batteries still exhibit considerable electrochemical performance, even with high-loading electrodes (about 4 mg cm-2 ).
Collapse
Affiliation(s)
- Wenwei Zhang
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, 430068, P. R. China
| | - Yao Xiao
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, 430068, P. R. China
| | - Chunli Zuo
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, 430068, P. R. China
| | - Wen Tang
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, 430068, P. R. China
| | - Gangyuan Liu
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, 430068, P. R. China
| | - Shiyu Wang
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, 430068, P. R. China
| | - Wanyue Cai
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, 430068, P. R. China
| | - Shijie Dong
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, 430068, P. R. China
- Hubei University of Economics, Wuhan, 430205, P. R. China
| | - Ping Luo
- Hubei Provincial Key Laboratory of Green Materials for Light Industry, School of Materials and Chemical Engineering, Hubei University of Technology, Wuhan, 430068, P. R. China
| |
Collapse
|
12
|
Zhao S, Su W, Deng L, Chen Y, Zuo C, Shao C, Ren F. Pancreatic sarcomatoid carcinoma: CT, MRI, and 18F-FDG PET/CT features. Clin Radiol 2020; 75:397.e7-397.e14. [PMID: 32044096 DOI: 10.1016/j.crad.2020.01.003] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2019] [Accepted: 01/03/2020] [Indexed: 12/17/2022]
Abstract
AIM To investigate computed tomography (CT), magnetic resonance imaging (MRI), and combined 2-[18F]-fluoro-2-deoxy-d-glucose (18F-FDG) positron-emission tomography (PET)/CT features of pancreatic sarcomatoid carcinoma (PSC). MATERIALS AND METHODS The hospital database was searched retrospectively for the patients with PSC confirmed at histopathology after surgery. Ten patients who underwent unenhanced and enhanced CT (n=4), unenhanced and enhanced MRI (n=2), 18F-FDG PET/CT (n=2), and both enhanced CT and 18F-FDG PET/CT (n=2) were enrolled. Two patients underwent additional delayed PET/CT. The maximum standardised uptake value (SUVmax) was measured on PET/CT images. RESULTS Eleven lesions were detected in 10 patients. Solid and cystic components (n=6), intratumoural haemorrhage (n=1), nodular calcification (n=2), main pancreatic duct dilatation resulted from lesion obstruction (n=5) or compression (n=3), cholangiectasis (n=5), vascular and peripheral organ invasion (n=5 and 6, respectively), hepatic and lymphatic metastases (n=4 and 2, respectively) were detected. All five lesions in four patients who underwent PET/CT showed intense FDG uptake on PET/CT with SUVmax (16, range 10.9-21.1). Increase of FDG uptake (SUVmax = 18.9, 20.1, and 27.3, respectively) was revealed on the delayed scan of three lesions in two patients. CONCLUSIONS PSCs were more commonly ill-defined solid cystic masses, which caused pancreatic duct obstruction/compression without pancreatic parenchymal atrophy, and these masses on PET/CT showed high FDG uptake on both initial and delayed PET/CT.
Collapse
Affiliation(s)
- S Zhao
- Department of Nuclear Medicine, Changhai Hospital, No. 168, Changhai Road, Yangpu District, Shanghai, 200433, China
| | - W Su
- Department of Nuclear Medicine, Changhai Hospital, No. 168, Changhai Road, Yangpu District, Shanghai, 200433, China
| | - L Deng
- Department of Pathology, Changhai Hospital, No. 168, Changhai Road, Yangpu District, Shanghai, 200433, China
| | - Y Chen
- Department of Pathology, Changhai Hospital, No. 168, Changhai Road, Yangpu District, Shanghai, 200433, China
| | - C Zuo
- Department of Nuclear Medicine, Changhai Hospital, No. 168, Changhai Road, Yangpu District, Shanghai, 200433, China
| | - C Shao
- Department of Radiology, Changhai Hospital, No. 168, Changhai Road, Yangpu District, Shanghai, 200433, China.
| | - F Ren
- Department of Nuclear Medicine, Changhai Hospital, No. 168, Changhai Road, Yangpu District, Shanghai, 200433, China.
| |
Collapse
|
13
|
Ding S, Chen J, Zeng Q, Lu J, Tan L, Guo A, Kang J, Yang S, Xiang Y, Zuo C, Huang J. 长期日晒与组蛋白乙酰化变化有关. Br J Dermatol 2018. [DOI: 10.1111/bjd.16866] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
14
|
Ding S, Chen J, Zeng Q, Lu J, Tan L, Guo A, Kang J, Yang S, Xiang Y, Zuo C, Huang J. Chronic sun exposure is associated with histone acetylation changes. Br J Dermatol 2018. [DOI: 10.1111/bjd.16852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
15
|
Ding S, Chen J, Zeng Q, Lu J, Tan L, Guo A, Kang J, Yang S, Xiang Y, Zuo C, Huang J. Chronic sun exposure is associated with distinct histone acetylation changes in human skin. Br J Dermatol 2018; 179:110-117. [PMID: 29150847 DOI: 10.1111/bjd.16129] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/08/2017] [Indexed: 01/24/2023]
Abstract
BACKGROUND Photoageing is attributed to continuous sunlight or artificial ultraviolet exposure and manifests as clinical and histological changes in skin. Epigenetic changes have been found to be involved in the pathogenesis of photoageing. However, the underlying mechanisms are unclear. OBJECTIVES To analyse histone modification patterns in sun-exposed and nonexposed skin, and to identify the abnormally histone-modified genes related to photoageing. METHODS Skin biopsies were collected from both the outer forearm (sun-exposed area) and the buttock (sun-protected area) in 20 healthy middle-aged female volunteers. Global histone H3/H4 acetylation and H3K4/H3K9 methylation statuses were assessed by enzyme-linked immunosorbent assay. Expression levels of histone acetyltransferases and histone deacetylases were measured by reverse-transcriptase quantitative polymerase chain reaction (qPCR) and Western blot. Chromatin immunoprecipitation combined with DNA microarray (ChIP-chip) assay with anti-acetyl-histone H3 antibody in a sun-exposed pool (combining six sun-exposed skin samples) and a nonexposed pool (combining six nonexposed skin samples) was conducted to explore the abnormally acetylated histone H3 genes related to photoageing; ChIP-qPCR was then used to verify the results of ChIP-chip. RESULTS We observed higher global histone H3 acetylation levels increased EP300 and decreased HDAC1 and SIRT1 expression in sun-exposed skin compared with matched nonexposed skin. Furthermore, the ChIP-chip assay showed that 227 genes displayed significant hyperacetylation of histone H3, and 81 genes displayed significant hypoacetylation of histone H3 between the two groups. Histone H3 acetylation levels on the promoters of PDCD5, ITIH5, MMP1 and AHR were positively correlated with the mRNA expression of the corresponding gene. CONCLUSIONS Chronic sun exposure-induced histone H3 hyperacetylation may play a critical role in the pathogenesis of skin photoageing.
Collapse
Affiliation(s)
- S Ding
- Department of Dermatology, The Third Xiangya Hospital of Central South University, 138 Tong Zipo Road, Changsha, 410013, Hunan, China
| | - J Chen
- Department of Dermatology, The Third Xiangya Hospital of Central South University, 138 Tong Zipo Road, Changsha, 410013, Hunan, China
| | - Q Zeng
- Department of Dermatology, The Third Xiangya Hospital of Central South University, 138 Tong Zipo Road, Changsha, 410013, Hunan, China
| | - J Lu
- Department of Dermatology, The Third Xiangya Hospital of Central South University, 138 Tong Zipo Road, Changsha, 410013, Hunan, China
| | - L Tan
- Department of Dermatology, The Third Xiangya Hospital of Central South University, 138 Tong Zipo Road, Changsha, 410013, Hunan, China
| | - A Guo
- Department of Dermatology, The Third Xiangya Hospital of Central South University, 138 Tong Zipo Road, Changsha, 410013, Hunan, China
| | - J Kang
- Department of Dermatology, The Third Xiangya Hospital of Central South University, 138 Tong Zipo Road, Changsha, 410013, Hunan, China
| | - S Yang
- Department of Dermatology, The Third Xiangya Hospital of Central South University, 138 Tong Zipo Road, Changsha, 410013, Hunan, China
| | - Y Xiang
- Department of Dermatology, The Third Xiangya Hospital of Central South University, 138 Tong Zipo Road, Changsha, 410013, Hunan, China
| | - C Zuo
- Department of Dermatology, The Third Xiangya Hospital of Central South University, 138 Tong Zipo Road, Changsha, 410013, Hunan, China
| | - J Huang
- Department of Dermatology, The Third Xiangya Hospital of Central South University, 138 Tong Zipo Road, Changsha, 410013, Hunan, China
| |
Collapse
|
16
|
Li GY, Yin SJ, Liu Y, Li H, Song S, Kong ZB, Zuo C, Liu H, Zhu Z. [Correlation analysis of serum secreted frizzled-related protein 5 levels with airway inflammation and insulin resistance in chronic obstructive pulmonary disease patients]. Zhonghua Jie He He Hu Xi Za Zhi 2017; 40:903-908. [PMID: 29224299 DOI: 10.3760/cma.j.issn.1001-0939.2017.12.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the relationship between serum secreted frizzled-related protein 5(sfrp5) levels, insulin resistance, and airway inflammation in patients with chronic obstructive pulmonary disease(COPD). Method: A total of 178 COPD patients visiting our respiratory outpatient clinic from February 2015 to January 2017 were enrolled, and 99 healthy control subjects from the same time period were selected. Serum sfrp5 levels were compared between the 2 groups. Serum sfrp5 and inflammatory cytokines in induced sputum were observed in the 4 subgroups: insulin resistant COPD group [homeostasis model assessment of insulin resistance (HOMA-IR)≥2.29], non-insulin resistant COPD group, non-COPD insulin resistant group, and healthy control group. Results: Serum sfrp5 levels were found to be significantly higher in the COPD group as compared to the healthy control group (t=-14.29, P<0.001). Serum sfrp5 levels in the insulin resistant COPD group [(8±3)ng/ml] were significantly lower than that of the non-insulin resistant COPD group [(10±5)ng/ml], non-COPD insulin resistant group [(13±3)ng/ml], and normal control group [(14±4)ng/ml, F=35.85, P<0.01]. The insulin resistant COPD group had higher levels of In(Homa-IR), as well as tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6) in induced sputum as compared to the non-insulin resistant COPD group, non-COPD insulin resistant group, and healthy control group (F values were 64.968, 41.40, 64.15, respectively, P value <0.01 for all items). The non-insulin resistant COPD group had higher levels of In(HOMA-IR) as well as TNF-α and IL-6 in induced sputum as compared to the non-COPD insulin resistant group and healthy control group. FEV(1)/FVC and FEV(1)% predicted were significantly lower in the insulin resistant COPD group as compared to those of non-insulin resistant COPD group and non-COPD insulin resistant group, and healthy control group (F values were 2.481 and 8.37, respectively, P value<0.05 for all items). FEV(1)/FVC and FEV(1)% predicted were significantly lower in the non-insulin resistant COPD group as compared to those of the healthy control group and non-COPD insulin-resistant group. Serum sfrp5 levels were positively correlated to FEV(1)/FVC and FEV(1) predicted (r values were 0.466 and 0.412, respectively; P values were <0.001 and 0.007, respectively) and inversely correlated to In(HOMA-IR) and TNF-α and IL-6 in induced sputum (r values were -0.304, -0.459, -0.517, respectively; P values were <0.001, 0.002, <0.001, respectively). BMI, ln(HOMA-IR), and IL-6 in induced sputum were independent related factors (r(2) values were 0.286, 0.176, 14.69, respectively; P values were <0.01 for all items) Conclusion: Sfrp5 may be concurrently associated with COPD and insulin resistance; insulin resistance may be associated with airway inflammation and airflow limitation. Sfrp5 may be involved in the development of COPD and may be the key link by which insulin resistance exerts its effects on airway inflammation.
Collapse
Affiliation(s)
- G Y Li
- Department of Respiratory, Shanghai Jiaotong University Affiliated Sixth People's Hospital, Shanghai 201306, China
| | | | | | | | | | | | | | | | | |
Collapse
|
17
|
Chen S, Peng D, Xu X, Gao J, Dai F, Zuo C, Zhang Q. Assessment of erectile dysfunction and associated psychological distress in Chinese men with type 2 diabetes mellitus. Int J Impot Res 2017; 29:210-214. [DOI: 10.1038/ijir.2017.25] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2016] [Revised: 04/02/2017] [Accepted: 05/02/2017] [Indexed: 12/15/2022]
|
18
|
Yuan Z, Yan T, Zheng W, Zuo C, Li H, Bian X, Zhang B, Li C, Cao Z, Xian L, Di Y, Liu F. Electrolytic partitioning of uranium and plutonium based on a new type of electrolytic mixer-settler. RADIOCHIM ACTA 2013. [DOI: 10.1524/ract.2013.2061] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Summary
The design of a new type of electroreduction mixer-settler for the partitioning of uranium and plutonium during the Purex process, which is featured with E-shaped cathodes and U-shaped anodes in settling chamber, is described and the operational results achieved using this equipment are presented. The results show that this new type of mixer-settler has excellent separation performances. The flow rate of organic feed solution is 3 mL/min and the flow ratio of feed solution (1BF) to aqueous back extraction stream (1BX) and to organic wash stream (1BS) is 4/1/1. For an organic feed of 84 g/L uranium and 1.40 ⁓ 2.64 g/L plutonium, both the separation factor of plutonium from uranium and that of uranium from plutonium are apparently higher than 104
Collapse
Affiliation(s)
- Z. Yuan
- China Institute of Atomic Energy, P.O. Box 275-26, Beijing 102413, P. R. China
| | - T. Yan
- China Institute of Atomic Energy, P.O. Box 275-26, Beijing 102413, P. R. China
| | - W. Zheng
- China Institute of Atomic Energy, P.O. Box 275-26, Beijing 102413, P. R. China
| | - C. Zuo
- China Institute of Atomic Energy, P.O. Box 275-26, Beijing 102413, P. R. China
| | - H. Li
- China Institute of Atomic Energy, P.O. Box 275-26, Beijing 102413, P. R. China
| | - X. Bian
- China Institute of Atomic Energy, P.O. Box 275-26, Beijing 102413, P. R. China
| | - B. Zhang
- China Institute of Atomic Energy, P.O. Box 275-26, Beijing 102413, P. R. China
| | - C. Li
- China Institute of Atomic Energy, P.O. Box 275-26, Beijing 102413, P. R. China
| | - Z. Cao
- China Institute of Atomic Energy, P.O. Box 275-26, Beijing 102413, P. R. China
| | - L. Xian
- China Institute of Atomic Energy, P.O. Box 275-26, Beijing 102413, P. R. China
| | - Y. Di
- China Institute of Atomic Energy, P.O. Box 275-26, Beijing 102413, P. R. China
| | - F. Liu
- China Institute of Atomic Energy, P.O. Box 275-26, Beijing 102413, P. R. China
| |
Collapse
|
19
|
Abstract
Bone remodeling is essential for adult bone homeostasis. The failure of this process often leads to the development of osteoporosis, a present major global health concern. The most important factor that affects normal bone remodeling is the tightly controlled and orchestrated regulation of osteoblasts and osteoclasts. The present review summarized the recent discoveries related to osteoblast regulation from several signals, including transforming growth factor-β, bone morphogenetic proteins, Wnt signal, Notch, Eph-Ephrin interaction, parathyroid hormone/parathyroid hormone-related peptide, and the leptin-serotonin-sympathetic nervous systemic pathway. The awareness of these mechanisms will facilitate further research that explores bone remodeling and osteoporosis. Future investigations on the endogenous regulation of osteoblastogenesis will increase the current knowledge required for the development of potential drug targets in the treatment of osteoporosis.
Collapse
Affiliation(s)
- C Zuo
- Key Laboratory of Stem Cell Biology, Institute of Health Sciences, Shanghai Jiao Tong University School of Medicine & Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai, China
| | | | | | | | | | | | | |
Collapse
|
20
|
Yan TH, Zheng WF, Zuo C, Xian L, Zhang Y, Bian XY, Li RX, Di Y. The reduction of Np(VI) and Np(V) by tit dihydroxyurea and its application to the U/Np separation in the PUREX process. RADIOCHIM ACTA 2010. [DOI: 10.1524/ract.2010.1677] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
21
|
Li D, Zuo C, Guan Y, Zhao Y, Shen J, Zan S, Sun B. FDG-PET study of the bilateral subthalamic nucleus stimulation effects on the regional cerebral metabolism in advanced Parkinson disease. Acta Neurochir Suppl 2007; 99:51-4. [PMID: 17370764 DOI: 10.1007/978-3-211-35205-2_10] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The aim of the study was to evaluate the changes in regional cerebral metabolic rate of glucose (rCMRGlu) induced by bilateral subthalamic nucleurs (STN) stimulation in advanced Parkinson's disease (PD). 18F-Fluorodeoxyglucose (FDG) PET data obtained before and one month after stimulation were analyzed with statistical parametric mapping (SPM). As a result of clinically effective bilateral STN stimulation, rCMRGlu increased in lateral globus pallidus (GP), upper brain stem, dorsolateral prefrontal cortex (DLPFC) and posterior parietal-occipital cortex, and decreased in the orbital frontal cortex and parahippocampus gyrus (p < 0.001). We conclude that the alleviation of clinical symptoms in advanced PD by bilateral STN stimulation may be the result of activation of both ascending and descending pathways from STN and of restoration of the impaired higher-order cortex functions.
Collapse
Affiliation(s)
- D Li
- Department of Neurosurgery, Shanghai Second Medical University Ruijin Hospital, Shanghai, P.R. China
| | | | | | | | | | | | | |
Collapse
|
22
|
Chen C, Tsai Y, Zuo C, Lai W. 102 Effects of Type II Collagen and Basic?FGF on Cartilage Wound Healing in a 3D Defect Model. Wound Repair Regen 2004. [DOI: 10.1111/j.1067-1927.2004.0abstractcv.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
23
|
Hu J, Jiang Q, Xia Y, Zuo C. High spatial resolution in vivo 2D (1)H magnetic resonance spectroscopic imaging of human muscles with a band-selective technique. Magn Reson Imaging 2001; 19:1091-6. [PMID: 11711233 DOI: 10.1016/s0730-725x(01)00438-6] [Citation(s) in RCA: 7] [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: 12/01/2022]
Abstract
This report demonstrates a 2D (1)H magnetic resonance spectroscopic imaging (MRSI) technique that can address some technical difficulties often encountered in MRS studies of human muscles. A preliminary application of this whole-slice technique in human skeletal muscles demonstrates clearly noticeable differences in (1)H metabolite spectra between different human muscles. This observation illustrates the importance of multi-voxel and high spatial resolution in a heterogeneous environment. This technique is robust, can be easily implemented on a commercial MR scanner, and should prove useful for investigators in both basic and clinical (1)H MRS studies.
Collapse
Affiliation(s)
- J Hu
- Department of Radiology, Wayne State University, Detroit, MI 48201, USA.
| | | | | | | |
Collapse
|
24
|
Abstract
UNLABELLED Our purpose was to evaluate if temperature changes occur in maternal or fetal tissues during HASTE imaging. METHODS Pregnant pigs were scanned with the HASTE technique, and temperatures were measured with phase maps and temperature probes inserted into the amniotic fluid and fetal brain. RESULTS Fiberoptic probes showed that no heating occurred in fetal tissues or amniotic fluid during HASTE imaging. CONCLUSION Our current HASTE protocols do not deposit a significant amount of heat in the gravid uterus. J. Magn. Reson. Imaging 2001;13:856-861.
Collapse
Affiliation(s)
- D Levine
- Department of Radiology, Beth Israel Deaconess Medical Center, 330 Brookline Avenue, Boston, MA 02215, USA.
| | | | | | | |
Collapse
|
25
|
Liu G, Chen Y, Wang L, Zuo C, Xie Q, Wang Z, Lin M. [The risk of sustained amenorrhea in patients with systemic lupus erythematosus receiving intermittent pulse cyclophosphamide therapy]. Hua Xi Yi Ke Da Xue Xue Bao 2001; 32:294-5, 306. [PMID: 12600113] [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: 03/01/2023]
Abstract
OBJECTIVE To determine the risk of sustained amenorrhea in premenopausal women with systemic lupus erythematosus (SLE) receiving intermittent pulse cyclophosphamide (CTX) therapy. METHODS Prospectively comparing the amenorrhea rate of 51 cases receiving intermittent pulse cyclophosphamide therapy versus that of 22 cases receiving intermittent pulse methylprednisolone (MP) therapy. RESULTS The amenorrhea rate was higher in the CTX group (19.6%) than in the MP group (P = 0.025). In the CTX group, the amenorrhea rate of patients aged over 30 was higher than that of patients aged 30 or below 30 (P = 0.0018). CONCLUSION Pulse CTX therapy in fertile women with SLE is associated with increased rate of sustained amenorrhea, and the older the patient is, the higher risk for sustained amenorrhea the patient runs.
Collapse
Affiliation(s)
- G Liu
- Department of Clinical Immunology, First Affiliated Hospital, WCUMS, Chengdu 610041, China
| | | | | | | | | | | | | |
Collapse
|
26
|
Liu G, Chen Y, Zuo C, Xie Q, Wang Z, Wang L, Lin M. [Study on bolus cyclosphamide treatment for 64 cases of lupus nephritis]. Hua Xi Yi Ke Da Xue Xue Bao 2001; 32:129-30, 139. [PMID: 12733378] [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: 03/02/2023]
Abstract
OBJECTIVE To report on the dosing, efficacy and side-effects of bolus cyclosphamide treatment for lupus nephritis (LN). METHODS 64 consecutive cases of LN with 10 or more erythrocytes per high-power field, proteinuria (> 1 g of protein per day) and serum creatinine increased (> 133 mumol/L) were treated by bolus therapy with cyclophosphamide (CTX) given monthly for 6 months and then quarterly for 18 months. RESULTS 49 patients had renal remission (defined as < 10 erythrocytes per high-power field, absence of cellular casts, excretion of < 1 g of protein per day and normal serum creatinine). The mean of doses was 1.1 g for each time (0.6-1.6 g), the mean of times of bolus CTX needed was 3.6 (1-8 times). The adverse events were amenorrhea (in 41% female patients), herpes zoster (in 13% patients) and hemorrhagic cystitis (in 1 patient). CONCLUSION The results indicate that monthly bolus CTX therapy is effective and safe for patients with LN. Its adverse effect is relatively not a serious problem.
Collapse
Affiliation(s)
- G Liu
- Department of Clinical Immunology, First Affiliated Hospital, WCUMS, Chengdu 610041, China
| | | | | | | | | | | | | |
Collapse
|
27
|
Serrai H, Senhadji L, Clayton DB, Zuo C, Lenkinski RE. Water modeled signal removal and data quantification in localized MR spectroscopy using a time-scale postacquistion method. J Magn Reson 2001; 149:45-51. [PMID: 11273750 DOI: 10.1006/jmre.2001.2292] [Citation(s) in RCA: 6] [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] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
We have previously shown the continuous wavelet transform (CWT), a signal-processing tool, which is based upon an iterative algorithm using a lorentzian signal model, to be useful as a postacquisition water suppression technique. To further exploit this tool we show its usefulness in accurately quantifying the signal metabolites after water removal. However, due to the static field inhomogeneities, eddy currents, and "radiation damping," the water signal and the metabolites may no longer have a lorentzian lineshape. Therefore, another signal model must be used. As the CWT is a flexible method, we have developed a new algorithm using a gaussian model and found that it fits the signal components, especially the water resonance, better than the lorentzian model in most cases. A new framework, which uses the two models, is proposed. The framework iteratively extracts each resonance, starting by the water peak, from the raw signal and adjusts its envelope to both the lorentzian and the gaussian models. The model giving the best fit is selected. As a consequence, the small signals originating from metabolites when selecting, removing, and quantifying the dominant water resonance from the raw time domain signal are preserved and an accurate estimation of their concentrations is obtained. This is demonstrated by analyzing (1H) magnetic resonance spectroscopy unsuppressed water data collected from a phantom with known concentrations at two different field strengths and data collected from normal volunteers using two different localization methods.
Collapse
Affiliation(s)
- H Serrai
- Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts 02215, USA
| | | | | | | | | |
Collapse
|
28
|
Liu G, Wang Z, Wang L, Xie Q, Zhang R, Zuo C, Lin M. [The correlation between anticardiolipin antibodies and disease activity in patients with systemic lupus erythematosus]. Hua Xi Yi Ke Da Xue Xue Bao 2000; 31:223-5. [PMID: 12515143] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
This study was conducted to determine the prevalence and clinical association of anticardiolipin antibodies (ACA) in serum of patients with systemic lupus erythematosus (SLE). ACA (IgG, IgA, IgM) was measured by enzyme-linked immunosorbent assay (ELISA) in the serum sample of 87 patients of SLE. The prevalence rates of ACAIgG, ACAIgA and ACAIgM were 62.1%, 52.9% and 35.6% respectively. The titers of ACAIgG and ACAIgM were positively correlated with the disease activity (r = 0.2763, P = 0.044; r = 0.3294, P = 0.018); ACAIgG, ACAIgA and ACAIgM were negatively correlated with complement C3 (r = -0.4737, P = 0.000; r = -0.2990, P = 0.017; r = -0.2758, P = 0.029); and ACAIgG was negatively correlated with complement C4 (r = -0.4079, P = 0.005). The titers of ACAIgA in patients with thrombosis was higher than that in patients without thrombosis. The patients with central nervous system involvement (CNS-SLE) had significantly higher ACAIgG and ACAIgM titers, compared with those without CNS-SLE. The results indicate there is a correlation between ACA titers and disease activity. In patients with thrombosis, the titer of ACAIgA is higher, and in patients with CNS-SLE, the titers of ACAIgG and ACAIgM are higher.
Collapse
Affiliation(s)
- G Liu
- Department of Clinical Immunology, First Affiliated Hospital, WCUMS, Chengdu 610041
| | | | | | | | | | | | | |
Collapse
|
29
|
Yang S, Zhong Y, Luo H, Ding X, Zuo C. [Studies on chemical constituents of the roots of Gypsophila oldhamiana Miq]. Zhongguo Zhong Yao Za Zhi 1999; 24:680-1, 703. [PMID: 12212087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
Abstract
OBJECTIVE To separate compounds from the root of Gypsophila oldhamiana. METHOD Chemical and chromatographic methods were used to separate the compounds. IR, MS, NMR were used to determine the structures of compounds. RESULT Compound pentacosanoic acid, lacceroic acid, beta-sitosterol, alpha-spinasterol, daucosterol and sucrose were identified. CONCLUSION All the above compounds were obtained from this genus for the first time.
Collapse
Affiliation(s)
- S Yang
- Institute of Meteria Medica, Shandong Academy of Medical Sciences, Jinan 250062
| | | | | | | | | |
Collapse
|
30
|
Abstract
Antieplepsirine (AES) is a new antiepileptic drug (AED) which was originally extracted from a Chinese folk remedy, and is now chemically characterized and synthesized. Its chemical structure is different from those of other available AEDs. Animal experiments involving AES demonstrated significant antiepileptic activity. Only a few clinical studies of AES with open trial have been resorted, none of which were on children. A 6.5 month, add-on, double-blind, placebo-controlled, randomized, cross-over study on AES (10 mg/kg per day) was conducted on epileptic children (aged 1-14 years) refractory to treatment with standard AEDs. The seizure frequency was recorded, and the blood levels of AES and other co-medicated AEDs (phenobarbital, phenytoin, carbamazepine and valproate) were determined. Although not planned, patients or parents were allowed to refuse to cross-over to the alternate therapy. The results were compared to the children who crossed-over as well as for the entire group during the first 3 months of randomized treatment. A total of 58 children entered, but only 34/58 children completed the cross-over study. The 24 children whose parents refused to let them be crossed-over continued the original study treatment (AES or placebo) for the entire 6 months. There was no statistically significant difference in seizure control when the entire group of 58 patients was compared to a parallel study group for the first 3 months of therapy (P = 0.178). There was a significant difference (P<0.01) in seizure control between AES and placebo treatment for the 34 patients who completed the entire cross-over study. No significant changes were seen in the blood level of other AEDs, and no serious acute side effects were observed. The results of the present study indicate the efficacy of AES for epileptic children with refractory seizures.
Collapse
Affiliation(s)
- L Wang
- Pediatric Neurology, First Teaching Hospital, Beijing Medical University, China
| | | | | | | | | | | | | |
Collapse
|
31
|
Zhong Y, Zuo C, Li F, Ding X, Yao Q, Wu K, Zhang Q, Wang Z, Zhou LW, Lan J, Wang X. [Chemical constituents of Phyllanthus urinaria L. and its antiviral activity against hepatitis B virus]. Zhongguo Zhong Yao Za Zhi 1998; 23:363-4, 384. [PMID: 11601301] [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: 02/21/2023]
Abstract
Studies on the chemical constituents of Phyllanthus urinaria and its antiviral activity against hepatitis B virus were completed. Eleven compounds have been isolated. Two of them are new compounds methyl ester dehydrochebulic acid and methyl brevifolin carboxylate. Antiviral experiments on HBsAg in vitro and liver damage caused by CCl4 have shown that. Phyllanthus urinaria possesses antiviral activities against HBV.
Collapse
Affiliation(s)
- Y Zhong
- Institute of Meteria Medica, Shangdong Academy of Medical Sciences, Jinan 250062
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
32
|
Abstract
Ar+ ion beam enhanced deposition (IBED) was used to produce a hydroxyapatite (HA) film on polished titanium substrates. In this study, the HA ceramic target was sputtered by an argon-ion beam with an energy of 1.5 KeV, and the sputtered film was intermittently bombarded by energetic argon-ions at 60 KeV. An effective Ca-Ti mixed layer produced by the energetic argon-ion bombardment was confirmed by using Auger electron spectroscopy. The characteristics of the deposited films were evaluated by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, X-ray diffraction (XRD) and scanning electron microscopy (SEM) analyses. XRD analysis revealed that the as-deposited film was amorphous, and a hydroxyapatite-type structure was obtained from the post-heat treatment of the deposited films. SEM observations showed that no distinct difference in surface morphology was found between the as-deposited and heat-treated samples for Ar+ IBED films, suggesting a strongly bonded HA film on the titanium substrate. In comparison with the HA target, some chemistry alterations were brought about in the deposited films, such as the incorporation of CO3, the loss of the OH groups and some distortion of the phosphate lattice.
Collapse
Affiliation(s)
- X Li
- Institute of Materials Science & Technology, Sichuan University, Chengdu, China
| | | | | | | | | | | | | |
Collapse
|
33
|
Mulkern RV, Meng J, Bowers JL, Oshio K, Zuo C, Li H, Kraft RA, Williamson DS, Jaramillo D. In vivo bone marrow lipid characterization with line scan Carr-Purcell-Meiboom-Gill proton spectroscopic imaging. Magn Reson Imaging 1997; 15:823-37. [PMID: 9309613 DOI: 10.1016/s0730-725x(97)00134-3] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Line scan Carr-Purcell-Meiboom-Gill spectroscopic imaging sequences have been used to extract lipid chemical composition indices in healthy adult bone marrow in the knee at 1.5 T. Since several spectroscopic echo readouts follow each excitation, the information acquired reflects a balance between spectral T2 decay processes and spectral resolution. To examine this balance in detail, data sets with two different echo spacings and spectral resolutions have been acquired to compare the information available from each in studies of bone marrow. Oils for which high field (7 T) proton spectra were recorded were used to evaluate the accuracy of lipid chemical composition indices extracted from the line scan Carr-Purcell-Meiboom-Gill spectroscopic imaging methods at 1.5 T. The extension of the method to fast spectroscopic imaging of bone marrow with multiple echoes is demonstrated.
Collapse
Affiliation(s)
- R V Mulkern
- Department of Radiology, Children's Hospital, Boston, MA, USA.
| | | | | | | | | | | | | | | | | |
Collapse
|
34
|
Miao E, Joardar S, Zuo C, Cloutier NJ, Nagahisa A, Byon C, Wilson SR, Orme-Johnson WH. Cytochrome P-450scc-mediated oxidation of (20S)-22-thiacholesterol: characterization of mechanism-based inhibition. Biochemistry 1995; 34:8415-21. [PMID: 7599132 DOI: 10.1021/bi00026a024] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [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: 01/26/2023]
Abstract
(20S)-22-thiacholesterol (1) is found to be a potent competitive inhibitor of pregnenolone biosynthesis from cholesterol by purified reconstituted bovine adrenal cytochrome P-450scc. The apparent dissociation constant Kd, determined from difference spectra, is 0.6 microM, close to the value from kinetic studies for the apparent inhibition constant, Ki, of 0.8 microM. Studies of the time course of pregnenolone production indicate that under turnover conditions the competitive inhibitor (1) is converted to a tighter binding inhibitor, shown to be (20S,22R)-22-thiacholesterol S-oxide (4), with high diastereoselectivity and in a time-dependent manner. Both the diastereomeric sulfoxides, (20S,22S)-22-thiacholesterol S-oxide (3) and (20S,22R)-22-thiacholesterol S-oxide (4), exhibit properties consistent with their being competitive versus cholesterol, but the (22R)-sulfoxide (4) binds approximately 10 times more tightly than the (22S) diastereomer (3). The apparent Kd values of sulfoxides 4 and 3 are 0.1 and 1.14 microM, respectively. EPR and absorption spectroscopic studies of enzyme-inhibitor complexes suggest direct coordination of the oxygen atom of the (22R)-sulfoxide (4) with the catalytic heme center. This implies that the inhibitor operates by directly blocking further reaction at the active site heme group, with a substantial lifetime of the enzyme-inhibitor complex.
Collapse
Affiliation(s)
- E Miao
- Department of Chemistry, Massachusetts Institute of Technology, Cambridge 02139, USA
| | | | | | | | | | | | | | | |
Collapse
|
35
|
Hartnell G, Buff B, Zuo C, Moore J, Finn J. Segmented K-space acquisition magnetic resonance angiography increases pulsatile flow signal. Does it improve the quality of renal artery imaging? Clin Radiol 1994. [DOI: 10.1016/s0009-9260(05)82808-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
36
|
Shi Q, Zuo C. [Chemical components of the leaves of Pistacia Chinensis Bge]. Zhongguo Zhong Yao Za Zhi 1992; 17:422-3, 446. [PMID: 1445648] [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: 12/27/2022]
Abstract
Six compounds have been isolated from the leaves of Pistacia chinensis, a species of Anacardiaceae family. Their structures were identified on the basis of UV, IR, NMR, and MS as gallic acid, m-digallic acid, quercetin, 6-0-galloyl arbutin-quercitrin and quercetin-3-0(6''-galloyl)-beta-D-glucosides.
Collapse
Affiliation(s)
- Q Shi
- Institute of Materia Medica, Shandong Academy of Medical Sciences, Jinan
| | | |
Collapse
|
37
|
Ding X, Jiang Y, Zhong Y, Zuo C. [Chemical constituents of the leaves of Crataegus pinnatifida Bge. var. major N. E. Br]. Zhongguo Zhong Yao Za Zhi 1990; 15:295-7, 319. [PMID: 2275782] [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: 12/31/2022]
Abstract
Compounds were isolated from the aqueous extract of the leaves of Crataegus pinnatifida var. major and seven of them were identified as 2-(4-hydroxybenzyl)malic acid, quercetin, hyperin, vitexin, rhamnosylvitexin, diethylamine hydrochloride and sorbitol respectively by UV, IR, NMR, MS, some chemical techniques by comparison with the standard spectra of known compounds.
Collapse
Affiliation(s)
- X Ding
- Institute of Materia Medica, Shandong Academy of Medical Sciences, Jinan
| | | | | | | |
Collapse
|
38
|
Wright J, Bastian N, Davis TA, Zuo C, Yoshimoto S, Orme-Johnson WH, Tauber AI. Structural characterization of the isoenzymatic forms of human myeloperoxidase: evaluation of the iron-containing prosthetic group. Blood 1990; 75:238-41. [PMID: 2153031] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Myeloperoxidase (MPO) from human neutrophils has been purified and found to exist in three isoenzymatic forms, resolved by ion exchange chromatography. In addition to differences in subunit size and cellular compartmentalization of the isoenzymes, differences have been reported in their activity and susceptibility to inhibition. The structural basis of these isoenzymes is unclear; we attempted to further define their functional characteristics and structural identity. First, we measured respective enzymatic activity using a panel of substrates; MPO I was found to have lower activity with some substrates (pyrogallol, guaiacol, potassium iodide [KI]), but similar activity to the other isoenzymes with 4-aminoantipyrine. These studies confirm that MPO I is enzymatically distinct from MPO II and MPO III. Next, we examined the structural basis of these differences by evaluating the iron-containing prosthetic group in each form using electron paramagnetic resonance (EPR) and determination of the pyridine hemochrome. No significant difference between the isoenzymes was noted in these parameters, suggesting that the prosthetic group is the same in each protein. The cause for any difference in enzymatic activity must lie then in variations extrinsic to the heme, and based on previous studies of the gene and protein analysis, the posttranslational modification of MPO must account for these isoenzymatic species.
Collapse
Affiliation(s)
- J Wright
- William B. Castle Hematology Research Laboratory, Boston City Hospital, MA 02118
| | | | | | | | | | | | | |
Collapse
|
39
|
Abstract
Eight hundred and forty-six Chinese adolescents were surveyed concerning sleep behaviours including insomnia, nightmares, somniloquism, somnambulism, bruxism, and enuresis. Bruxism was reported most frequently (22%) followed by somniloquism (17%) and insomnia (14.9%). Subjects were compared by sex, age, and rearing by parents or parent surrogates. Cross cultural comparisons and the possible significance of findings are discussed.
Collapse
|
40
|
Abstract
The authors conducted a study of psychiatric consultation in a Chinese general hospital. Seventy-five inpatients (0.74% of the patients in the hospital) were referred by different services over a 1-year period. Internal medicine referred the most patients, and organic brain syndromes were the most common diagnoses. Depression was not a frequent diagnosis, but neurasthenia was a fairly common one. None of the referred patients had a diagnosis of alcoholism, drug abuse, or personality disorder. The authors compare these data with those of Western studies and discuss the possible factors influencing psychiatric consultation in China.
Collapse
|