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Liu Y, Zhao Y, Liao X, Zhou S, Guo X, Yang L, Lv B. PD-1 deficiency aggravates spinal cord injury by regulating the reprogramming of NG2 glia and activating the NgR/RhoA/ROCK signaling pathway. Cell Signal 2024; 114:110978. [PMID: 37972801 DOI: 10.1016/j.cellsig.2023.110978] [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: 07/09/2023] [Revised: 10/24/2023] [Accepted: 11/13/2023] [Indexed: 11/19/2023]
Abstract
Spinal cord injury (SCI) is a devastating disorder and a leading cause of disability in adults worldwide. Multiple studies have reported the upregulation of programmed cell death 1 (PD-1) following SCI. However, the underlying mechanism of PD-1 deficiency in SCI is not well established. Therefore, we aimed to investigate the role and potential mechanism of PD-1 in SCI pathogenesis. PD-1 Knockout (KO) SCI mouse model was established, and PD-1 expression was evaluated in tissue samples by western blot assay. We then used a series of function gain-and-loss assays to determine the role of PD-1 in SCI pathogenesis. Moreover, mechanistic assays were performed to explore the association between PD-1, neuron-glia antigen-2 (NG2) glia cells, and miR-23b-5p and then investigated the involved signaling pathway. Results illustrated that PD-1 deficiency enhanced the inflammatory response, neuron loss, and functional impairment induced by SCI. We found that NG2 glia depletion aggravated inflammation, reduced neural survival, and suppressed locomotor recovery in murine SCI model. Further analysis indicated that NG2+ cells were increased in the spinal cord of SCI mice, and PD-1 deficiency increased the number of NG2+ cells by activating the Nogo receptor/ras homolog family member A/Rho kinase (NgR/RhoA/ROCK) signaling. Mechanistically, miR-23b-5p was identified as the negative regulator of PD-1 in NG2 glia. MiR-23b-5p deficiency reduced the expression of inflammatory cytokines, enhanced neural survival, and promoted locomotor recovery in SCI mice, which was counteracted by PD-1 deficiency. In conclusion, PD-1 deficiency exacerbates SCI in vivo by regulating reprogramming of NG2 glia and activating the NgR/RhoA/ROCK signaling.
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Affiliation(s)
- Yang Liu
- Spine Center, Department of Orthopaedics, Shanghai Changzheng Hospital, Second Affiliated Hospital of Naval Medical University, No.415 Fengyang Road, Shanghai, 200003, China
| | - Yin Zhao
- Spine Center, Department of Orthopaedics, Shanghai Changzheng Hospital, Second Affiliated Hospital of Naval Medical University, No.415 Fengyang Road, Shanghai, 200003, China
| | - Xinyuan Liao
- Spine Center, Department of Orthopaedics, Shanghai Changzheng Hospital, Second Affiliated Hospital of Naval Medical University, No.415 Fengyang Road, Shanghai, 200003, China
| | - Shengyuan Zhou
- Spine Center, Department of Orthopaedics, Shanghai Changzheng Hospital, Second Affiliated Hospital of Naval Medical University, No.415 Fengyang Road, Shanghai, 200003, China
| | - Xiang Guo
- Spine Center, Department of Orthopaedics, Shanghai Changzheng Hospital, Second Affiliated Hospital of Naval Medical University, No.415 Fengyang Road, Shanghai, 200003, China
| | - Lili Yang
- Spine Center, Department of Orthopaedics, Shanghai Changzheng Hospital, Second Affiliated Hospital of Naval Medical University, No.415 Fengyang Road, Shanghai, 200003, China
| | - Bitao Lv
- Spine Center, Department of Orthopaedics, Shanghai Changzheng Hospital, Second Affiliated Hospital of Naval Medical University, No.415 Fengyang Road, Shanghai, 200003, China.
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Kong QF, Lv B, Wang B, Zhang XP, Sun HJ, Liu J. Association of von Willebrand factor (vWF) expression with lymph node metastasis and hemodynamics in papillary thyroid carcinoma. Eur Rev Med Pharmacol Sci 2021; 24:2564-2571. [PMID: 32196607 DOI: 10.26355/eurrev_202003_20525] [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] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE The purpose of this study was to analyze the relationship between von Willebrand factor (vWF) expression and lymph node metastasis or hemodynamics parameters in PTC. This work will provide a novel biomarker for the diagnosis of papillary thyroid carcinoma (PTC). PATIENTS AND METHODS A total of 156 PTC patients were divided into metastatic and non-metastatic groups based on the presence or absence of lymph node metastasis. The Adler blood flow grading, color doppler flow imaging (CDFI), and blood flow index (PSV, PI, RI, AT) were measured and analyzed between the two groups. The expression of vWF was examined by immunocytochemical assay and quantitative Real-Time Polymerase Chain Reaction (qRT-PCR). The function of vWF was investigated by methyl thiazolyl tetrazolium (MTT) and the transwell assays. RESULTS Both metastatic and non-metastatic groups with the major Adler grades as 0-1 had abundant blood flows. There was a significant difference in the rate of lymph node metastasis between Adler 2-3 and Adler 0-1. Moreover, the expression of vWF was found to be associated with lymph node metastasis or Adler blood flow grade in PTC. Significant differences in peak systolic velocity (PSV), systolic acceleration time (AT), and resistance index (RI) were detected in metastatic and non-metastatic groups. In addition, the upregulation of vWF was positively correlated with PSV, RI, and PI in PTC. Functionally, the knockdown of vWF inhibited the development of PTC by suppressing cell proliferation, migration, and invasion. CONCLUSIONS Abnormal expression of vWF is closely related to lymph node metastasis and hemodynamics parameters in PTC patients. Furthermore, vWF plays an oncogene role in PTC progression.
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Affiliation(s)
- Q-F Kong
- Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, China.
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Huyan S, Deng LZ, Wu Z, Zhao K, Sun JY, Wu LJ, Zhao YY, Yuan HM, Gooch M, Lv B, Zhu Y, Chen S, Chu CW. Low-temperature microstructural studies on superconducting CaFe 2As 2. Sci Rep 2019; 9:6393. [PMID: 31015499 PMCID: PMC6478709 DOI: 10.1038/s41598-019-42660-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Accepted: 03/28/2019] [Indexed: 11/09/2022] Open
Abstract
Undoped CaFe2As2 (Ca122) can be stabilized in two slightly different non-superconducting tetragonal phases, PI and PII, through thermal treatments. Upon proper annealing, superconductivity with a Tc up to 25 K emerges in the samples with an admixture of PI and PII phases. Systematic low-temperature X-ray diffraction studies were conducted on undoped Ca122 samples annealed at 350 °C over different time periods. In addition to the diffraction peaks associated with the single-phase aggregation of PI and PII, a broad intermediate peak that shifts with annealing time was observed in the superconducting samples only. Our simulation of phase distribution suggests that the extra peak is associated with the admixture of PI and PII on the nanometer scale. High-resolution transmission electron microscopy confirms the existence of these nano-scale phase admixtures in the superconducting samples. These experimental results and simulation analyses lend further support for our conclusion that interfacial inducement is the most reasonable explanation for the emergence of superconductivity in undoped Ca122 single crystals.
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Affiliation(s)
- S Huyan
- Department of Physics and Texas Center for Superconductivity, University of Houston, Houston, TX, 77204-5005, USA.
| | - L Z Deng
- Department of Physics and Texas Center for Superconductivity, University of Houston, Houston, TX, 77204-5005, USA
| | - Z Wu
- Department of Physics and Texas Center for Superconductivity, University of Houston, Houston, TX, 77204-5005, USA
| | - K Zhao
- Department of Physics and Texas Center for Superconductivity, University of Houston, Houston, TX, 77204-5005, USA
| | - J Y Sun
- Department of Physics and Texas Center for Superconductivity, University of Houston, Houston, TX, 77204-5005, USA
| | - L J Wu
- Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - Y Y Zhao
- School of Physics and Optoelectronic Engineering, Nanjing University of Information Science and Technology, Nanjing, China
| | - H M Yuan
- Department of Physics and Texas Center for Superconductivity, University of Houston, Houston, TX, 77204-5005, USA
| | - M Gooch
- Department of Physics and Texas Center for Superconductivity, University of Houston, Houston, TX, 77204-5005, USA
| | - B Lv
- Department of Physics, University of Texas at Dallas, Richardson, TX, 75080, USA
| | - Y Zhu
- Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, NY, 11973, USA
| | - S Chen
- Department of Physics and Texas Center for Superconductivity, University of Houston, Houston, TX, 77204-5005, USA
| | - C W Chu
- Department of Physics and Texas Center for Superconductivity, University of Houston, Houston, TX, 77204-5005, USA. .,Lawrence Berkeley National Laboratory, Berkeley, CA, 94720, USA.
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Jiang XH, Zhou WM, He YZ, Wang Y, Lv B, Wang XM. Effects of lipopeptide carboxymethyl chitosan nanoparticles on Staphylococcus aureus biofilm. J BIOL REG HOMEOS AG 2017; 31:737-743. [PMID: 28956426] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
This study aims to evaluate the effect of lipopeptide carboxymethyl chitosan nanoparticles on Staphylococcus aureus biofilm as part of the development of a new anti-biofilm material. The study had three stages. Firstly, we assessed the Staphylococcus aureus capability to form biofilm and enumerated the number of attached bacteria and free bacteria; secondly, we determined the inhibitory effect of different concentrations of Bacillus natto antimicrobial lipopeptid- carboxymethyl chitosan (BNAP-CMCS) nanoparticles added at different times on biofilm formation capability and the numbers of free bacteria and attached bacteria. Lastly, we tested the scavenging effect of BNAP-CMCS nanoparticles on biofilm formation and number of attached bacteria. The results showed that the amount of attached bacteria quickly increased over time and reached the maximum after 24 h of culture. The BNAP-CMCS nanoparticles had the greatest effect on biofilm inhibition at the concentration of 1 MIC, after 8 h of culture, and the effect was dose-dependent. The BNAP-CMCS nanoparticles had decreased also the numbers of free and attached bacteria in a dose-dependent fashion, after 8 hours of culture. The scavenging effect of BNAP-CMCS nanoparticles on free and attached bacteria was maximum at 6 MIC. In conclusion, lipopeptide carboxymethyl chitosan nanoparticles had a good inhibition and scavenging effect on the formation of Staphylococcus aureus biofilm and the growth of surface-attached bacteria.
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Affiliation(s)
- X H Jiang
- Emergency Department, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, China
| | - W M Zhou
- Laboratory Animal Research Center, Zhejiang Chinese Medical University, Hangzhou, China
| | - Y Z He
- Emergency Department, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, China
| | - Y Wang
- Clinical microbiology Center, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, China
| | - B Lv
- Emergency Department, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, China
| | - X M Wang
- Zhejiang-California International Nano Systems Institute, Zhejiang University, Hangzhou, China
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Pan M, Chai L, Xue F, Ding L, Tang G, Lv B. Comparisons of external fixator combined with limited internal fixation and open reduction and internal fixation for Sanders type 2 calcaneal fractures: Finite element analysis and clinical outcome. Bone Joint Res 2017; 6:433-438. [PMID: 28747337 PMCID: PMC5539306 DOI: 10.1302/2046-3758.67.2000640] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVES The aim of this study was to compare the biomechanical stability and clinical outcome of external fixator combined with limited internal fixation (EFLIF) and open reduction and internal fixation (ORIF) in treating Sanders type 2 calcaneal fractures. METHODS Two types of fixation systems were selected for finite element analysis and a dual cohort study. Two fixation systems were simulated to fix the fracture in a finite element model. The relative displacement and stress distribution were analysed and compared. A total of 71 consecutive patients with closed Sanders type 2 calcaneal fractures were enrolled and divided into two groups according to the treatment to which they chose: the EFLIF group and the ORIF group. The radiological and clinical outcomes were evaluated and compared. RESULTS The relative displacement of the EFLIF was less than that of the plate (0.1363 mm to 0.1808 mm). The highest von Mises stress value on the plate was 33% higher than that on the EFLIF. A normal restoration of the Böhler angle was achieved in both groups. No significant difference was found in the clinical outcome on the American Orthopedic Foot and Ankle Society Ankle Hindfoot Scale, or on the Visual Analogue Scale between the two groups (p > 0.05). Wound complications were more common in those who were treated with ORIF (p = 0.028). CONCLUSIONS Both EFLIF and ORIF systems were tested to 160 N without failure, showing the new construct to be mechanically safe to use. Both EFLIF and ORIF could be effective in treating Sanders type 2 calcaneal fractures. The EFLIF may be superior to ORIF in achieving biomechanical stability and less blood loss, shorter surgical time and hospital stay, and fewer wound complications.Cite this article: M. Pan, L. Chai, F. Xue, L. Ding, G. Tang, B. Lv. Comparisons of external fixator combined with limited internal fixation and open reduction and internal fixation for Sanders type 2 calcaneal fractures: Finite element analysis and clinical outcome. Bone Joint Res 2017;6:433-438. DOI: 10.1302/2046-3758.67.2000640.
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Affiliation(s)
- M Pan
- Orthopaedics Department, Southern Medical University Fengxian District Central Hospital, No. 6600, Nanfeng Road, Fengxian District, Shanghai, China
| | - L Chai
- Orthopaedics Department, The People's Hospital of Bozhou, Anhui Province, No. 3, Xuejia Alley, Qiaocheng District, Bozhou city, Anhui Province, China
| | - F Xue
- Orthopaedics Department, Southern Medical University Fengxian District Central Hospital, No. 6600, Nanfeng Road, Fengxian District, Shanghai, China
| | - L Ding
- Orthopaedics Department, Southern Medical University Fengxian District Central Hospital, No. 6600, Nanfeng Road, Fengxian District, Shanghai, China
| | - G Tang
- Orthopaedics Department, Southern Medical University Fengxian District Central Hospital, No. 6600, Nanfeng Road, Fengxian District, Shanghai, China
| | - B Lv
- Orthopaedics Department, Southern Medical University Fengxian District Central Hospital, No. 6600, Nanfeng Road, Fengxian District, Shanghai, China
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Lv B, Zhou S, Peng H, Ma H, Wu Y, Zhao X. Successful management of primary splenic pregnancy: a case report and review of literature. CLIN EXP OBSTET GYN 2017. [DOI: 10.12891/ceog3568.2017] [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: 11/01/2022]
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7
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Lv B, Zhou ST, Peng HL, Ma HW, Wu Y, Zhao X. Successful management of primary splenic pregnancy: a case report and review of literature. CLIN EXP OBSTET GYN 2017; 44:487-488. [PMID: 29949303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Ectopic pregnancy is defined as dislocation of a fertilized ovum anywhere other than in the cavity of uterus. Generally, the common site for dislocation is within fallopian tube, accounting for 95.5% of all ectopic gestations. Abdominal pregnancy is rare with a potentially life-threatening variation that resides within peritoneal cavity and the primary splenic pregnancy is even rarer. This report describes a patient with primary splenic pregnancy, who was successfully managed after splenectomy.
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Zhang Y, Xiao F, Lu S, Song J, Zhang C, Li J, Gu K, Lan A, Lv B, Zhang R, Mo F, Jiang G, Zhang X, Yang X. Research trends and perspectives of male infertility: a bibliometric analysis of 20 years of scientific literature. Andrology 2016; 4:990-1001. [PMID: 27389996 DOI: 10.1111/andr.12204] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Revised: 03/25/2016] [Accepted: 03/31/2016] [Indexed: 12/14/2022]
Affiliation(s)
- Y. Zhang
- Medical Scientific Research Center; Guangxi Medical University; Nanning Guangxi China
| | - F. Xiao
- Medical Scientific Research Center; Guangxi Medical University; Nanning Guangxi China
| | - S. Lu
- Center for Reproductive Medicine; Provincial Hospital Affiliated to Shandong University; Jinan China
| | - J. Song
- The Second Affiliated Hospital of Guilin Medical University; Guilin Guangxi China
| | - C. Zhang
- Medical Scientific Research Center; Guangxi Medical University; Nanning Guangxi China
| | - J. Li
- Medical Scientific Research Center; Guangxi Medical University; Nanning Guangxi China
| | - K. Gu
- Department of Urology; The First Affiliated Hospital of Guangxi Medical University; Nanning Guangxi China
| | - A. Lan
- Medical Scientific Research Center; Guangxi Medical University; Nanning Guangxi China
| | - B. Lv
- Department of Urology; The First Affiliated Hospital of Guangxi Medical University; Nanning Guangxi China
| | - R. Zhang
- Medical Scientific Research Center; Guangxi Medical University; Nanning Guangxi China
| | - F. Mo
- Beijing University of Chinese Medicine; Beijing China
| | - G. Jiang
- Beijing University of Chinese Medicine; Beijing China
| | - X. Zhang
- Department of Urology; Zhongnan Hospital of Wuhan University; Wuhan Hubei China
| | - X. Yang
- Medical Scientific Research Center; Guangxi Medical University; Nanning Guangxi China
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Yi M, Liu ZK, Zhang Y, Yu R, Zhu JX, Lee JJ, Moore RG, Schmitt FT, Li W, Riggs SC, Chu JH, Lv B, Hu J, Hashimoto M, Mo SK, Hussain Z, Mao ZQ, Chu CW, Fisher IR, Si Q, Shen ZX, Lu DH. Observation of universal strong orbital-dependent correlation effects in iron chalcogenides. Nat Commun 2015. [PMID: 26204461 PMCID: PMC4525196 DOI: 10.1038/ncomms8777] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
Abstract
Establishing the appropriate theoretical framework for unconventional superconductivity in the iron-based materials requires correct understanding of both the electron correlation strength and the role of Fermi surfaces. This fundamental issue becomes especially relevant with the discovery of the iron chalcogenide superconductors. Here, we use angle-resolved photoemission spectroscopy to measure three representative iron chalcogenides, FeTe0.56Se0.44, monolayer FeSe grown on SrTiO3 and K0.76Fe1.72Se2. We show that these superconductors are all strongly correlated, with an orbital-selective strong renormalization in the dxy bands despite having drastically different Fermi surface topologies. Furthermore, raising temperature brings all three compounds from a metallic state to a phase where the dxy orbital loses all spectral weight while other orbitals remain itinerant. These observations establish that iron chalcogenides display universal orbital-selective strong correlations that are insensitive to the Fermi surface topology, and are close to an orbital-selective Mott phase, hence placing strong constraints for theoretical understanding of iron-based superconductors. A proper theoretical description for unconventional superconductivity in iron-based compounds remains elusive. Here, the authors, to capture the electron correlation strength and the role of Fermi surfaces, report ARPES measurements of three iron chalcogenide superconductors to establish universal features.
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Affiliation(s)
- M Yi
- 1] Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, California 94025, USA [2] Departments of Physics and Applied Physics, and Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305, USA
| | - Z-K Liu
- 1] Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, California 94025, USA [2] Departments of Physics and Applied Physics, and Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305, USA
| | - Y Zhang
- 1] Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, California 94025, USA [2] Advanced Light Source, Lawrence Berkeley National Lab, Berkeley, California 94720, USA
| | - R Yu
- 1] Department of Physics, Renmin University of China, Beijing 100872, China [2] Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA
| | - J-X Zhu
- Theoretical Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
| | - J J Lee
- 1] Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, California 94025, USA [2] Departments of Physics and Applied Physics, and Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305, USA
| | - R G Moore
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, California 94025, USA
| | - F T Schmitt
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, California 94025, USA
| | - W Li
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, California 94025, USA
| | - S C Riggs
- 1] Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, California 94025, USA [2] Departments of Physics and Applied Physics, and Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305, USA
| | - J-H Chu
- Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, California 94025, USA
| | - B Lv
- Department of Physics, Texas Center for Superconductivity, University of Houston, Houston, Texas 77204, USA
| | - J Hu
- Department of Physics and Engineering Physics, Tulane University, New Orleans, Louisiana 70118, USA
| | - M Hashimoto
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
| | - S-K Mo
- Advanced Light Source, Lawrence Berkeley National Lab, Berkeley, California 94720, USA
| | - Z Hussain
- Advanced Light Source, Lawrence Berkeley National Lab, Berkeley, California 94720, USA
| | - Z Q Mao
- Department of Physics and Engineering Physics, Tulane University, New Orleans, Louisiana 70118, USA
| | - C W Chu
- Department of Physics, Texas Center for Superconductivity, University of Houston, Houston, Texas 77204, USA
| | - I R Fisher
- 1] Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, California 94025, USA [2] Departments of Physics and Applied Physics, and Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305, USA
| | - Q Si
- Department of Physics and Astronomy, Rice University, Houston, Texas 77005, USA
| | - Z-X Shen
- 1] Stanford Institute for Materials and Energy Sciences, SLAC National Accelerator Laboratory and Stanford University, Menlo Park, California 94025, USA [2] Departments of Physics and Applied Physics, and Geballe Laboratory for Advanced Materials, Stanford University, Stanford, California 94305, USA
| | - D H Lu
- Stanford Synchrotron Radiation Lightsource, SLAC National Accelerator Laboratory, Menlo Park, California 94025, USA
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Zhang B, Luo Z, Zhao Y, Lv B, Song S, Duan C, Chen Z. Effect of a high-density coarse-particle layer on the stability of a gas–solid fluidized bed for dry coal beneficiation. ACTA ACUST UNITED AC 2014. [DOI: 10.1016/j.minpro.2014.08.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Li J, Shi W, Li M, Wang Z, He H, Xian J, Lv B, Yan F. Time-dependent diffusion tensor changes of optic nerve in patients with indirect traumatic optic neuropathy. Acta Radiol 2014; 55:855-63. [PMID: 24097827 DOI: 10.1177/0284185113506900] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
BACKGROUND Indirect traumatic optic neuropathy (ITON) is a devastating cause of permanent visual loss. Axonal degeneration, the characteristic pathological change of ITON, cannot be assessed by conventional imaging. Diffusion tensor imaging (DTI) has been widely used as a sensitive non-invasive imaging technique to obtain information on axonal integrity. PURPOSE To study time-dependent changes in ITON patients with DTI and to provide imaging evidence for clinical diagnosis and therapy. MATERIAL AND METHODS We enrolled 28 subjects with unilateral ITON who underwent detailed ocular examinations and magnetic resonance imaging (MRI) examinations. The differences between injured optic nerve (ON) and contralateral ON were tested. The patients were divided into three groups based on time (from injury to examination). Groups 1, 2, and 3 corresponded to the time taken from injury to examination: <7 days, 7-30 days, and >30 days, respectively. DT magnetic resonance imaging (MRI) differences among the groups were compared, including the relationship between diffusion parameters and mean thicknesses of the peripapillary retinal nerve fiber layer (RNFL) and ganglion cell complex (GCC) in the macular area. RESULTS Compared with contralateral ON, we observed reduced fractional anisotropy (FA) of injured nerves in group 2. Reduced FA and decreased axial diffusivity (λ//) and increased radial diffusivity (λ┴) and mean diffusivity (MD) of injured nerves were observed in group 3. The mean FA value of injured nerves showed a progressive decreasing trend, and mean λ┴ value exhibited a progressive increasing trend. For injured eyes, the MD and λ┴ increases strongly correlated with the decreased mean thicknesses of RNFL and GCC. Conversely, FA was significantly associated with mean RNFL thickness. CONCLUSION DT-MRI parameters could be useful biomarkers in detecting ON changes in ITON patients.
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Affiliation(s)
- J Li
- Department of Radiology, Beijing Tongren Hospital, Capital Medical University, Beijing, PR China
| | - W Shi
- Department of Ophthalmology, Beijing Tongren Hospital, Capital Medical University, Beijing, PR China
| | - M Li
- Key Laboratory of Complex Systems and Intelligence Science, Institute of Automation, Chinese Academy of Sciences, PR China
| | - Z Wang
- Department of Radiology, Beijing Tongren Hospital, Capital Medical University, Beijing, PR China
| | - H He
- Key Laboratory of Complex Systems and Intelligence Science, Institute of Automation, Chinese Academy of Sciences, PR China
| | - J Xian
- Department of Radiology, Beijing Tongren Hospital, Capital Medical University, Beijing, PR China
| | - B Lv
- Key Laboratory of Complex Systems and Intelligence Science, Institute of Automation, Chinese Academy of Sciences, PR China
| | - F Yan
- Department of Radiology, Beijing Tongren Hospital, Capital Medical University, Beijing, PR China
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Zhang BC, Hou L, Lv B, Xu YW. Post-marketing surveillance study with iodixanol in 20 185 Chinese patients from routine clinical practices. Br J Radiol 2013; 87:20130325. [PMID: 24357597 PMCID: PMC4064546 DOI: 10.1259/bjr.20130325] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
Objective: To determine the incidence of immediate and delayed adverse drug reactions (ADRs), and to assess patient discomfort following administration of iodixanol during imaging examinations in routine clinical practice. Methods: A total of 20 185 patients across 95 clinical centres were enrolled in a prospective post-marketing surveillance registry with iodixanol. Patients were monitored for occurrence of ADRs immediately following iodixanol administration and for up to 7 days after administration. Results: The overall rate of ADRs was 1.52%, of which 0.58% was immediate and 0.97% was delayed onset. Two patients had non-fatal serious ADRs (0.01%). The ADRs were significantly more common in patients who underwent contrast-enhanced CT/coronary CT angiography vs others (p < 0.001), in those receiving pre-heated iodixanol vs non-heating (p < 0.001), in those aged 70 years or younger (p < 0.001), in those in whom a power injector was used for contrast delivery (p < 0.001) and in those with a history of an allergic reaction to contrast (p = 0.024). Multivariate analysis showed that female gender, intravenous route of contrast injection, body weight ≥80 kg, age less than 65 years, contrast flow rate ≥4 ml s−1 and prior reaction to iodinated contrast medium were all significant and independent contributors to ADRs. Pre-treatment contrast volume and history of cardiac disease, gout, hypertension, diabetes mellitus or asthma did not affect the rate of ADRs. Discomfort was generally mild, with 94.8% of patients reporting a composite score of 0–3. Conclusion: The safety of iodixanol in routine clinical practice was shown to be similar to the published safety profiles of other non-ionic iodinated contrast agents. Patient discomfort during administration was mild or absent in most patients. Advances in knowledge: The major strength of this study is that it included 20 185 patients enrolled in various types of imaging examinations. The safety profile of iodixanol was comparable to previously published work.
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Affiliation(s)
- B-C Zhang
- Department of Cardiology, Shanghai Tenth People's Hospital, Tongji University School of Medicine, Shanghai, China
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Liang Y, Gong XZ, Gan KF, Gauthier E, Wang L, Rack M, Wang YM, Zeng L, Denner P, Wingen A, Lv B, Ding BJ, Chen R, Hu LQ, Hu JS, Liu FK, Jie YX, Pearson J, Qian JP, Shan JF, Shen B, Shi TH, Sun Y, Wang FD, Wang HQ, Wang M, Wu ZW, Zhang SB, Zhang T, Zhang XJ, Yan N, Xu GS, Guo HY, Wan BN, Li JG. Magnetic topology changes induced by lower hybrid waves and their profound effect on edge-localized modes in the EAST tokamak. Phys Rev Lett 2013; 110:235002. [PMID: 25167503 DOI: 10.1103/physrevlett.110.235002] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2013] [Indexed: 06/03/2023]
Abstract
Strong mitigation of edge-localized modes has been observed on Experimental Advanced Superconducting Tokamak, when lower hybrid waves (LHWs) are applied to H-mode plasmas with ion cyclotron resonant heating. This has been demonstrated to be due to the formation of helical current filaments flowing along field lines in the scrape-off layer induced by LHW. This leads to the splitting of the outer divertor strike points during LHWs similar to previous observations with resonant magnetic perturbations. The change in the magnetic topology has been qualitatively modeled by considering helical current filaments in a field-line-tracing code.
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Affiliation(s)
- Y Liang
- Forschungszentrum Jülich GmbH, Association EURATOM-FZ Jülich, Institut für Energie und Klimaforschung Plasmaphysik, Trilateral Euregio Cluster, D-52425 Jülich, Germany
| | - X Z Gong
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - K F Gan
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - E Gauthier
- CEA, IRFM, F-13108 Saint-Paul-lez-Durance, France
| | - L Wang
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - M Rack
- Forschungszentrum Jülich GmbH, Association EURATOM-FZ Jülich, Institut für Energie und Klimaforschung Plasmaphysik, Trilateral Euregio Cluster, D-52425 Jülich, Germany
| | - Y M Wang
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - L Zeng
- Forschungszentrum Jülich GmbH, Association EURATOM-FZ Jülich, Institut für Energie und Klimaforschung Plasmaphysik, Trilateral Euregio Cluster, D-52425 Jülich, Germany and Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - P Denner
- Forschungszentrum Jülich GmbH, Association EURATOM-FZ Jülich, Institut für Energie und Klimaforschung Plasmaphysik, Trilateral Euregio Cluster, D-52425 Jülich, Germany
| | - A Wingen
- Oak Ridge National Laboratory, P.O. Box 2008, Oak Ridge, Tennessee 37831-6169, USA
| | - B Lv
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - B J Ding
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - R Chen
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - L Q Hu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - J S Hu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - F K Liu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - Y X Jie
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - J Pearson
- Forschungszentrum Jülich GmbH, Association EURATOM-FZ Jülich, Institut für Energie und Klimaforschung Plasmaphysik, Trilateral Euregio Cluster, D-52425 Jülich, Germany
| | - J P Qian
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - J F Shan
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - B Shen
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - T H Shi
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - Y Sun
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - F D Wang
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - H Q Wang
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - M Wang
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - Z W Wu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - S B Zhang
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - T Zhang
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - X J Zhang
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - N Yan
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - G S Xu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - H Y Guo
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - B N Wan
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - J G Li
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
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Yi M, Lu DH, Yu R, Riggs SC, Chu JH, Lv B, Liu ZK, Lu M, Cui YT, Hashimoto M, Mo SK, Hussain Z, Chu CW, Fisher IR, Si Q, Shen ZX. Observation of temperature-induced crossover to an orbital-selective Mott phase in A(x)Fe(2-y)Se2 (A=K, Rb) superconductors. Phys Rev Lett 2013; 110:067003. [PMID: 23432294 DOI: 10.1103/physrevlett.110.067003] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2012] [Indexed: 06/01/2023]
Abstract
Using angle-resolved photoemission spectroscopy, we observe the low-temperature state of the A(x)Fe(2-y)Se(2) (A=K, Rb) superconductors to exhibit an orbital-dependent renormalization of the bands near the Fermi level-the d(xy) bands heavily renormalized compared to the d(xz)/d(yz) bands. Upon raising the temperature to above 150 K, the system evolves into a state in which the d(xy) bands have depleted spectral weight while the d(xz)/d(yz) bands remain metallic. Combined with theoretical calculations, our observations can be consistently understood as a temperature-induced crossover from a metallic state at low temperatures to an orbital-selective Mott phase at high temperatures. Moreover, the fact that the superconducting state of A(x)Fe(2-y)Se(2) is near the boundary of such an orbital-selective Mott phase constrains the system to have sufficiently strong on-site Coulomb interactions and Hund's coupling, highlighting the nontrivial role of electron correlation in this family of iron-based superconductors.
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Affiliation(s)
- M Yi
- Stanford Institute of Materials and Energy Sciences, Stanford University, Stanford, California 94305, USA
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Liu Y, Lv B, He Z, Zhou Y, Han C, Shi G, Gao R, Wang C, Yang L, Song H, Yuan W. Lysyl oxidase polymorphisms and susceptibility to osteosarcoma. PLoS One 2012; 7:e41610. [PMID: 22911823 PMCID: PMC3402457 DOI: 10.1371/journal.pone.0041610] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2012] [Accepted: 06/22/2012] [Indexed: 12/24/2022] Open
Abstract
Despite the knowledge of many genetic alterations present in osteosarcoma, the complexity of this disease precludes placing its biology into a simple conceptual framework. Lysyl oxidase (LOX) catalyzes the cross-linking of elastin and collagen, which is essential for the structural integrity and function of bone tissue. In the current study, we performed genomic sequencing on all seven exons--including the intron-exon splice sites, and the putative promoter region of LOX gene--followed by luciferase reporter assay to analyze the function of newly identified polymorphisms. Associations between LOX polymorphisms and osteosarcoma were then evaluated. Our sequencing data revealed three polymorphisms (-22G/C, 225C/G, and 473G/A) in the exons and promoter region of LOX. The -22G/C polymorphism lies in the downstream core promoter element (DPE) region and caused a decrease in promoter activity of LOX. The prevalence of the -22C allele and 473A allele were significantly increased in osteosarcoma patients compared to controls (odds ratio [OR] = 3.88, 95% confidence interval [CI]= 1.94-7.78, p = 4.18×10(-5), and OR = 1.38, 95%CI = 1.07-1.78, p = 0.013; p 0.0167 was considered significant after Bonferroni correction). Analyzing haplotype showed that the frequency of CCG haplotype (-22, 225, 473) was significantly higher in osteosarcoma cases than in healthy controls after Bonferroni correction (p = 4.46×10(-4)). These results indicate that the -22G/C polymorphism may affect the expression of LOX, and that -22G/C and 473G/A polymorphisms may be new risk factors for osteosarcoma. These findings reveal a potential new pathway by which genetic polymorphisms may affect human diseases.
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Affiliation(s)
- Yang Liu
- Department of Spine Surgery, Changzheng Hospital, Second Military Medical University, Shanghai, China
| | - Bitao Lv
- Department of Spine Surgery, Changzheng Hospital, Second Military Medical University, Shanghai, China
| | - Zhimin He
- Department of Orthopedic Surgery, Fengxian Branch of the Shanghai No.6 People’s Hospital, Shanghai, China
| | - Yujia Zhou
- School of Occupational Therapy, Western University, London, Ontario, Canada
| | - Carrie Han
- Department of Immunology, University of Toronto, Toronto, Ontario, Canada
| | - Guodong Shi
- Department of Spine Surgery, Changzheng Hospital, Second Military Medical University, Shanghai, China
| | - Rui Gao
- Department of Spine Surgery, Changzheng Hospital, Second Military Medical University, Shanghai, China
| | - Ce Wang
- Department of Spine Surgery, Changzheng Hospital, Second Military Medical University, Shanghai, China
| | - Lili Yang
- Department of Spine Surgery, Changzheng Hospital, Second Military Medical University, Shanghai, China
| | - Haihan Song
- Emergency Center, Shanghai East Hospital, Tongji University, Shanghai, China
| | - Wen Yuan
- Department of Spine Surgery, Changzheng Hospital, Second Military Medical University, Shanghai, China
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Huang H, Wang F, Lv B, Xue FH, Guo DY, Park WJ, Lee WJ, Dong XL. Microwave absorption of gamma'-Fe2.6 Ni1.4N nanoparticles derived from nitriding counterpart precursor. J Nanosci Nanotechnol 2012; 12:3040-3047. [PMID: 22849063 DOI: 10.1166/jnn.2012.5842] [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: 06/01/2023]
Abstract
Gamma-Fe2.6Ni1.4 nanoparticles were prepared by the arc-discharge method as the precursor and its nitride counterpart of gamma'-Fe2.6Ni14N nanoparticles was synthesized directly through a thermal ammonolysis reaction at the temperature of 673 K for two hours. The resultant product was identified as a homogeneous ternary nitride with nearly spherical shape and average size of about 60.0 nm. The electromagnetic characteristics of gamma'-Fe2.6Ni1.4N derivant and gamma-Fe2.6Ni1.4 precursor have been studied in the frequency range of 2-18 GHz. Compared with the precursor, gamma'-Fe2.6Ni1.4N nanoparticles exhibits an enhanced electromagnetic absorption property resulted from the increased dielectric loss by nitriding process. The optimal reflection loss (RL) of gamma'-Fe2.6Ni1.4N nanoparticles/paraffin composite can reach -39.9 dB at 5.2 GHz in a thickness of 2.29 mm, and the frequency band corresponding RL < -10 dB is over 2.6-18 GHz in the thickness range of 0.78-4.20 mm.
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Affiliation(s)
- H Huang
- School of Material Science and Engineering, Dalian University of Technology, Dalian, Liaoning 116024, People's Republic of China
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Li M, He HG, Shi W, Li J, Lv B, Wang CH, Miao QW, Wang ZC, Wang NL, Walter M, Sabel BA. Quantification of the human lateral geniculate nucleus in vivo using MR imaging based on morphometry: volume loss with age. AJNR Am J Neuroradiol 2012; 33:915-21. [PMID: 22245591 DOI: 10.3174/ajnr.a2884] [Citation(s) in RCA: 26] [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] [Indexed: 11/07/2022]
Abstract
BACKGROUND AND PURPOSE Because it is a small subcortical structure, the precise measurement of the human LGN is still a technical challenge. In this article, we identify the LGN in vivo, measure its volume based on high-resolution MR imaging, and then relate its volume to subject age to evaluate the potential clinical application. MATERIALS AND METHODS A semiautomatic LGN isolation method was developed on scans obtained with 1.5T MR imaging, which involves highlighting the surrounding landmarks, obtaining candidate LGN voxels with a region-growing algorithm, and isolating the LGN from the ventral diencephalon. The method was accessed with a test-retest reliability on the results from 55 healthy subjects at different ages. RESULTS This method showed high test-retest within-subject reliability (ICC, 0.950 and 0.948 in left and right hemispheres, respectively) among 3 independent measurements in each subject. The unilateral volume was highly variable, ranging from 52 to 102 mm(3) in the left and 66 to 105 mm(3) in the right hemisphere, with significantly larger volumes on the right (86 mm(3)) than on the left (77 mm(3)). The combined bilateral volumes (controlled for ICV) significantly decreased in size with progressing age from 20 to 65 years (r = -0.512, P = .000). There was no sex difference in bilateral LGN volumes (male/female: 163.1 ± 18.2/162.2 ± 21.4 mm(3)). CONCLUSIONS Using our new technique, we were able to reliably determine the human LGN volume in vivo, which was found to decline with age. The volumes obtained by our method corresponded well with previously reported postmortem values, so our method may be considered to be superior for investigating the pathology of LGN.
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Affiliation(s)
- M Li
- State Key Laboratory of Management and Control for Complex Systems, Institute of Automation, Chinese Academy of Sciences, Beijing, China
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Ma M, Hui J, Lv B, Meng Y. Therapeutic value of continuous veno-venous hemofiltration administration in treating fulminant myocarditis. Heart 2011. [DOI: 10.1136/heartjnl-2011-300867.613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Lv B, Zhu XY, Zhang DZ. Estimation of haemodynamics parameters to transcatheter closure of patent ductus arteriosus complicated severe pulmonary arterial hypertension. Heart 2011. [DOI: 10.1136/heartjnl-2011-300867.526] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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21
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Li M, Li J, He H, Wang Z, Lv B, Li W, Hailla N, Yan F, Xian J, Ai L. Directional diffusivity changes in the optic nerve and optic radiation in optic neuritis. Br J Radiol 2011; 84:304-14. [PMID: 21415301 DOI: 10.1259/bjr/93494520] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
Abstract
OBJECTIVE Optic neuritis (ON) is defined as an inflammation of the optic nerve and provides a useful model for studying the effects of inflammatory demyelination of white matter. The aim of this study was to assess the diffusion changes in both the optic nerve and optic radiation in patients with acute and chronic ON using diffusion tensor (DT) MRI. METHODS 33 patients with idiopathic demyelinating optic neuritis (IDON) and 33 gender- and age-matched healthy controls were examined with DT-MRI and with T(1) and T(2) weighted MRI. RESULTS Compared with controls, both first-episode and recurrent patients with IDON in the acute stage showed significantly increased radial diffusivity (λ(⊥)) and decreased mean fractional anisotropy (FA) in the affected nerves. Reduced FA, increased λ(⊥), mean diffusivity (MD) and axial diffusivity (λ(∥)) were determined in patients with subacute IDON. We found no significant difference in the directional diffusivity of optic radiation in patients whose disease had lasted less than 1 year compared with healthy controls. However, significant changes in the FA and λ(⊥) of the optic radiation were detected in patients with disease duration of more than 1 year. CONCLUSION These results show the great potential and capacity of DT-MRI measures as useful biomarkers and indicators for the evaluation of myelin injury in the visual pathway.
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Affiliation(s)
- M Li
- Key Laboratory of Complex Systems and Intelligence Science, Institute of Automation, Chinese Academy of Sciences, China
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Xu XL, Zhang GL, Lv B, Yuan YJ, Li C. Recombinant glycerol dehydratase from Klebsiella pneumonia XJPD-Li: induction optimization, purification and characterization. APPL BIOCHEM MICRO+ 2011. [DOI: 10.1134/s0003683811020189] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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23
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Xu XL, Zhang GL, Lv B, Yuan YJ, Li C. Recombinant glycerol dehydratase from Klebsiella pneumoniae XJPD-Li: induction optimization, purification and characterization. Prikl Biokhim Mikrobiol 2011; 47:162-167. [PMID: 22808739] [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: 06/01/2023]
Abstract
Glycerol dehydratase (GDHt) is the rate limiting enzyme in the biosynthesis of 1,3-propanediol from glycerol. The optimization of inducting process for recombinant GDHt from Klebsiella pneumoniae XJPD-Li carried out to increase specific activity and ratio of soluble form. The optimum condition was inducing under the isopropyl-beta-D-thiogalactoside concentration of 0.8 mM and the temperature of 20 degrees C for 3 h. Homogeneity of GDHt then was obtained by affinity chromatography, resulted in 2.11-fold purification and an overall yield of 47.5%. The optimum pH and reaction temperature of GDHt were pH 8.0 and 45 degrees C, respectively. The K(m) for glycerol, 1,2-propanediol, 1,2-ethanediol and coenzyme B12 were 0.48, 1.43, 3.07 mM, and 10.03 nM, respectively. The GDHt showed relatively stable even under temperature of 40 degrees C and a bit blunt to oxygen. The thermo-inactivation kinetic models were fit linear under different temperatures.
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Affiliation(s)
- X L Xu
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, PR China.
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Li W, He H, Lu J, Lv B, Li M, Zhao M. Gray and white matter abnormalities in temporal lobe epilepsy with hippocampal sclerosis: A voxel-based morphometry study using DARTEL. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)71562-9] [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: 10/20/2022] Open
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Lv B, He H, Li M, Lu J, Li W, Zhao M. Cerebral asymmetry in temporal lobe epilepsy detected by weighted spherical harmonic representation. Neuroimage 2009. [DOI: 10.1016/s1053-8119(09)71880-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Du Y, Yang Z, Lv B, Lin L, Kragh PM, Zhang X, Vajta G, Yang H, Bolund L. 28 SIMPLIFIED ACTIVATION METHOD TO IMPROVE THE IN VITRO DEVELOPMENT OF HANDMADE CLONED (HMC) PORCINE EMBRYOS. Reprod Fertil Dev 2009. [DOI: 10.1071/rdv21n1ab28] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Delayed activation is commonly used in pig somatic cell nuclear transfer (SCNT) where electrical activation is followed by chemical activation. However, chemical incubation of several hours (up to 4 or 6) is logistically not very convenient even though handmade cloning (HMC) could improve the overall efficiency of pig cloning (Du et al. 2007 Theriogenology 68, 1104–1110). It was reported that a brief exposure of cycloheximide (CX) before electrical activation could significantly increase developmental rate and total blastocyst cell number when simultaneous activation was performed in micromanipulator-based pig cloning (Naruse et al. 2007 Theriogenology 68, 709–716). The purpose of our present work is to investigate whether such activation method is also applicable for pig HMC. Data were analyzed by t-test using SPSS (11.0, SPSS Inc., Chicago, IL, USA). After 42 h in vitro maturation, cumulus cells were removed. In vitro-cultured porcine fetal fibroblasts were used as donor cells. Cytoplast-fibroblast pairing, electrical fusion and activation of fused cytoplast-fibroblast pairs were performed as described previously (Kragh et al. 2005 Theriogenology 64, 1536–1545; Du et al. 2005 Cloning Stem Cells 7, 199–205). Three groups were compared due to different activation protocol. In Group 1 (control), reconstructed embryos were cultured in porcine zygote medium 3 (PZM3) supplemented with 4 mg mL–1 BSA, 5 μg mL–1 cytochalasin B (CB), and 10 μg mL–1 CX for 4 h. In Group 2 (CX priming), fused pairs and the other halves of cytoplasts were incubated in HEPES-buffered TCM-199 medium supplemented with 10% calf serum, 10 μg mL–1 CX for 10 min just before the second fusion or electrical activation. In Group 3 (CB + CX priming), treatment similar to Group 2 was performed except that additional 5 μg mL–1 CB was added for the 10-min incubation. Reconstructed embryos were in vitro cultured in the well of the well (WOW) system for 6 days. Blastocyst rates and total cell numbers of Day 6 blastocysts were evaluated. As illustrated in Table 1, embryos pretreated with both CB and CX gave the best results, with better blastocyst formation (53.8 ± 4.8%; mean ± SEM) and higher cell number (77.2 ± 5.4) compared to the other 2 groups. Our data suggested that CX and CB priming could be used as a solution to the long chemical incubation in porcine SCNT by HMC, making the embryos more receptive to electrical activation.
Table 1.In vitro development of HMC reconstructed embryos with different activation protocols
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Tian JR, Zhou PJ, Lv B. A process integration approach to industrial water conservation: a case study for a Chinese steel plant. J Environ Manage 2008; 86:682-7. [PMID: 17482751 DOI: 10.1016/j.jenvman.2006.12.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/28/2006] [Revised: 11/27/2006] [Accepted: 12/12/2006] [Indexed: 05/15/2023]
Abstract
A systematic approach to optimizing water network has traditionally been utilized to exam and plan water conservation in industrial processes. In the present case study, water-pinch technology was used to analyze and optimize the water network of a steel plant near China's Zhangjiakou city. A system design was developed and a limiting constraint (Cl(-) concentration) was identified based on investigations of water quality then the minimum freshwater and wastewater targets were determined without considering water losses. The analysis was then extended by calculating the additional input of freshwater required to balance the actual water losses. A nearest-neighbor algorithm (NNA) was used to distribute the freshwater and recycled water among each of the plant's operations. The results showed that with some reconstruction of the water network, the flow rates of freshwater and wastewater could be decreased by 57.5% and 81.9%, respectively.
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Affiliation(s)
- J R Tian
- College of Resources and Environmental Sciences, Wuhan University, Wuhan, PR China
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Abstract
Background: Plaque rupture with subsequent thrombosis is recognised as the underlying pathophysiology of most acute coronary syndromes. Thus, direct thrombus visualisation in vivo may be beneficial for both diagnosis and guidance of therapy. We sought to test the feasibility of imaging acute thrombosis in vivo using optical coherence tomography (OCT) in an experimental thrombosis animal model. Methods and results: Nine male New Zealand White rabbits (weight ≈3.0 kg) were made atherosclerotic with a high-cholesterol diet after injury of the right carotid artery endothelium. Thrombus was then induced with the use of Russell’s viper venom (RVV) and histamine. Subsequently, OCT imaging of the right carotid artery was performed. Histology was performed on arterial regions that were injured by balloon. Six rabbits (67%) developed thrombus. Histological correlation confirmed all thrombi (100%) detected with OCT, with no other thrombi seen in the other regions of the right carotid artery. In the remaining three rabbits, no thrombus was observed by OCT or histology. Conclusion: We demonstrate the feasibility of OCT for the detection of acute thrombosis in vivo using an animal model of atherosclerosis and acute thrombosis. Potential clinical applications include thrombus detection in acute coronary syndromes.
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Affiliation(s)
- L Meng
- Department of Cardiology, 2nd Affiliated Hospital, HarBin Medical University, HarBin, China, 150086.
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