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Xia W, Yang Y, Sheng L, Zhou Z, Chen L, Zhang Z, Zhang Z, Yang Q, Ren Q, Bao Z. Temperature-dependent molecular sieving of fluorinated propane/propylene mixtures by a flexible-robust metal-organic framework. Sci Adv 2024; 10:eadj6473. [PMID: 38241379 PMCID: PMC10798556 DOI: 10.1126/sciadv.adj6473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2023] [Accepted: 12/20/2023] [Indexed: 01/21/2024]
Abstract
The electronics industry necessitates highly selective adsorption separation of hexafluoropropylene (C3F6) from perfluoropropane (C3F8), which poses a challenge due to their similar physiochemical properties. In this work, we present a microporous flexible-robust metal-organic framework (Ca-tcpb) with thermoregulatory gate opening, a rare phenomenon that allows tunable sieving of C3F8/C3F6. Remarkably, the temperature-dependent adsorption behavior enhances the discrimination between the larger C3F8 and the smaller C3F6, resulting in unprecedented C3F6/C3F8 selectivity (over 10,000) compared to other well-known porous materials at an optimal temperature (298 K). Dynamic breakthrough experiments demonstrate that high-purity C3F8 (over 99.999%) could be obtained from a C3F6/C3F8 (10:90) mixture under ambient conditions. The unique attributes of this material encompass exceptional adsorption selectivity, remarkable structural stability, and outstanding separation performance, positioning it as a highly promising candidate for C3F6/C3F8 separation. Single-crystal structural analysis of C3F6-loaded Ca-tcpb and theoretical calculations elucidate the host-guest interaction via multiple intermolecular interactions.
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Affiliation(s)
- Wei Xia
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, 310027 Hangzhou, P. R. China
- Institute of Zhejiang University-Quzhou, 324000 Quzhou, P. R. China
| | - Yisi Yang
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, 310027 Hangzhou, P. R. China
- Fujian Provincial Key Laboratory of Polymer Materials, College of Materials Science and Engineering, Fujian Normal University, 350007 Fuzhou, P. R. China
| | - Liangzheng Sheng
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, 310027 Hangzhou, P. R. China
- Institute of Zhejiang University-Quzhou, 324000 Quzhou, P. R. China
| | - Zhijie Zhou
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, 310027 Hangzhou, P. R. China
- Institute of Zhejiang University-Quzhou, 324000 Quzhou, P. R. China
| | - Lihang Chen
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, 310027 Hangzhou, P. R. China
- Institute of Zhejiang University-Quzhou, 324000 Quzhou, P. R. China
| | - Zhangjing Zhang
- Fujian Provincial Key Laboratory of Polymer Materials, College of Materials Science and Engineering, Fujian Normal University, 350007 Fuzhou, P. R. China
| | - Zhiguo Zhang
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, 310027 Hangzhou, P. R. China
- Institute of Zhejiang University-Quzhou, 324000 Quzhou, P. R. China
| | - Qiwei Yang
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, 310027 Hangzhou, P. R. China
- Institute of Zhejiang University-Quzhou, 324000 Quzhou, P. R. China
| | - Qilong Ren
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, 310027 Hangzhou, P. R. China
- Institute of Zhejiang University-Quzhou, 324000 Quzhou, P. R. China
| | - Zongbi Bao
- Key Laboratory of Biomass Chemical Engineering of Ministry of Education, College of Chemical and Biological Engineering, Zhejiang University, 310027 Hangzhou, P. R. China
- Institute of Zhejiang University-Quzhou, 324000 Quzhou, P. R. China
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Pei S, Liu N, Luo X, Don YL, Chen Z, Li D, Miao D, Duan J, Yan OY, Sheng L, Ouyang G, Wang S, Wang X. An Immune-Related Gene Prognostic Prediction Risk Model for Neoadjuvant Chemoradiotherapy in Rectal Cancer Using Artificial Intelligence. Int J Radiat Oncol Biol Phys 2023; 117:e350. [PMID: 37785213 DOI: 10.1016/j.ijrobp.2023.06.2422] [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: 10/04/2023]
Abstract
PURPOSE/OBJECTIVE(S) To develop and validate an immune-related gene prognostic model (IRGPM) that can predict disease-free survival (DFS) in patients with locally advanced rectal cancer (LARC) who received neoadjuvant chemoradiotherapy and to clarify the immune characteristics of patients with different prognostic risks. MATERIALS/METHODS In this study, we obtained transcriptomic and clinical data from the Gene Expression Omnibus (GEO) database and rectal cancer database of West China Hospital. Genes in the RNA immune-oncology panel were extracted. Elastic net was used to identify the immune-related genes that significantly affected the DFS of patients. A prognostic risk model (IRGPM) for rectal cancer was constructed with the random forest method. The prognostic risk score was calculated by the model, and the patients were divided into high- and low-risk groups according to the median risk score. Immune characteristics were analyzed and compared between the high- and low-risk groups. RESULTS A total of 407 LARC samples were used in this study. A 20-gene signature was identified by elastic net and was found to be significantly correlated with DFS. The IRGPM was constructed on the basis of the 20 immune-related genes. Kaplan‒Meier survival analysis showed poorer 5-year DFS in the high-risk group than in the low-risk group, and the receiver operating characteristic (ROC) curve suggested good model prediction (areas under the curve (AUCs) of 0.87, 0.94, 0.95 at 1, 3, and 5 years, respectively). The model was validated in the GSE190826 cohort (AUCs of 0.79, 0.64, and 0.63 at 1, 3, and 5 years, respectively) and the cohort from our institution (AUCs of 0.64, 0.66, and 0. 64 at 1, 3, and 5 years, respectively). The differentially expressed genes between the high- and low-risk groups were enriched in cytokine‒cytokine receptor interactions. The patients in the low-risk group had higher immune scores than the patients in the high-risk group. Subsequently, we found that activated B cells, activated CD8 T cells, central memory CD8 T cells, macrophages, T follicular helper cells and type 2 helper cells were more abundant in the low-risk group. Moreover, we compared the expression of immune checkpoints and found that the low-risk group had a higher PDCD1 expression level. CONCLUSION The IRGPM, which was constructed based on the random forest and elastic net methods, is a promising method to distinguish DFS in LARC patients treated with a standard strategy. The low-risk group identified by IRGPM was characterized by the activation of adaptive immunity in tumor microenvironment.
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Affiliation(s)
- S Pei
- West China Hospital, Sichuan University, Chengdu, China
| | - N Liu
- Department of Radiation Oncology, Cancer Center, West China Hospital, Sichuan University, Chengdu, China
| | - X Luo
- Chengdu Institute of Computer Application, Chinese Academy of Sciences, Chengdu, China
| | - Y L Don
- West China Hospital Sichuan University, China, Chengdu, China
| | - Z Chen
- Chengdu Institute of Computer Application, Chinese Academy of Sciences, Chengdu, China
| | - D Li
- West China Hospital, Sichuan University, Chengdu, China
| | - D Miao
- Chengdu Institute of Computer Application, Chinese Academy of Sciences, Chengdu, China
| | - J Duan
- West China Hospital of Sichuan University, Chengdu, China
| | - O Y Yan
- West China Hospital, Sichuan University, Chengdu, China
| | - L Sheng
- West China Hospital of Sichuan University, Chengdu, China
| | - G Ouyang
- Department of Radiation Oncology, Cancer Center, West China Hospital, Sichuan University, Chengdu, China
| | - S Wang
- Chengdu Institute of Computer Application, Chinese Academy of Sciences, Chengdu, China
| | - X Wang
- Department of Radiation Oncology/Abdominal Oncology, Cancer Center, West China Hospital, Sichuan University, Chengdu, China
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Shi J, Zhang HY, Wang DY, Gao Q, Sheng L, Song PW, Zhang Y, Li Y. [Associations between various lipid components and premature myocardial infarction: a cross-sectional study]. Zhonghua Xin Xue Guan Bing Za Zhi 2023; 51:278-287. [PMID: 36925138 DOI: 10.3760/cma.j.cn112148-20221201-00957] [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: 03/18/2023]
Abstract
Objective: Hyperlipidemia is closely related to premature acute myocardial infarction (AMI). The present study was performed to explore the correlation between various blood lipid components and the risk of premature AMI. Methods: This is a cross-sectional retrospective study. Consecutive patients with acute ST-segment elevation myocardial infarction (STEMI), who completed coronary angiography from October 1, 2020 to September 30, 2022 in our hospital, were enrolled and divided into premature AMI group (male<55 years old, female<65 years old) and late-onset AMI group. Total cholesterol (TC), triglyceride (TG), low density lipoprotein cholesterol (LDL-C), high density lipoprotein cholesterol (HDL-C), non-HDL-C, lipoprotein (a) (Lp (a)), apolipoprotein B (ApoB), apolipoprotein A-1 (ApoA-1), non-HDL-C/HDL-C and ApoB/ApoA-1 were analyzed. The correlation between the above blood lipid indexes and premature AMI was analyzed and compared by logistic regression, restricted cubic spline and receiver operating characteristic curve (ROC). Results: A total of 1 626 patients with STEMI were enrolled in this study, including 409 patients with premature AMI and 1 217 patients with late-onset AMI. Logistic regression analysis showed that the risk of premature AMI increased significantly with the increase of TG, non-HDL-C/HDL-C, non-HDL-C, ApoB/ApoA-1, TC and ApoB quintiles; while LDL-C, ApoA-1 and Lp (a) had no significant correlation with premature AMI. The restricted cubic spline graph showed that except Lp (a), LDL-C, ApoA-1 and ApoB/ApoA-1, other blood lipid indicators were significantly correlated with premature AMI. The ROC curve showed that TG and non-HDL-C/HDL-C had better predictive value for premature AMI. Inconsistency analysis found that the incidence and risk of premature AMI were the highest in patients with high TG and high non-HDL-C/HDL-C. Conclusion: TG, non-HDL-C/HDL-C and other blood lipid indexes are significantly increased in patients with premature AMI, among which TG is the parameter, most closely related to premature AMI, and future studies are needed to explore the impact of controlling TG on incidence of premature AMI.
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Affiliation(s)
- J Shi
- Cardiovascular Department, the First Affiliated Hospital of Harbin Medical University, Harbin 150001, China
| | - H Y Zhang
- Cardiovascular Department, the First Affiliated Hospital of Harbin Medical University, Harbin 150001, China
| | - D Y Wang
- Cardiovascular Department, the First Affiliated Hospital of Harbin Medical University, Harbin 150001, China
| | - Q Gao
- Cardiovascular Department, the First Affiliated Hospital of Harbin Medical University, Harbin 150001, China
| | - L Sheng
- Cardiovascular Department, the First Affiliated Hospital of Harbin Medical University, Harbin 150001, China
| | - P W Song
- Cardiovascular Department, the First Affiliated Hospital of Harbin Medical University, Harbin 150001, China
| | - Y Zhang
- Cardiovascular Department, the First Affiliated Hospital of Harbin Medical University, Harbin 150001, China
| | - Y Li
- Cardiovascular Department, the First Affiliated Hospital of Harbin Medical University, Harbin 150001, China
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Yao ZM, Sheng L, Song Y, Hei DW, Li Y, Zhu ZJ, Zhou HY, Yan WP, Han CC, Duan BJ, Yang KX, Peng BD, Zhang SA, Qi DL, Jin CZ, Yao YH, Huang ZQ. Dual-channel compressed ultrafast photography for Z-pinch dynamic imaging. Rev Sci Instrum 2023; 94:035106. [PMID: 37012784 DOI: 10.1063/5.0127056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/19/2022] [Accepted: 12/22/2022] [Indexed: 06/19/2023]
Abstract
The compressed ultrafast photography (CUP) can capture non-repetitive time-evolving events at 7 × 1013 fps, which is anticipated to find a diverse range of applications in physics, biomedical imaging, and materials science. The feasibility of diagnosing ultrafast phenomenon of Z-pinch by using the CUP has been analyzed in this article. Specifically, a dual-channel CUP design has been adopted for acquiring high quality reconstructed images and the strategies of identical masks, uncorrelated masks, and complementary masks have been compared. Furthermore, the image of the first channel was rotated by 90° to balance the spatial resolution between the sweep direction and the non-sweep direction. Both five synthetic videos and two simulated Z-pinch videos were chosen as the ground truth to validate this approach. The average peak signal to noise ratio of the reconstruction results is 50.55 dB for the self-emission visible light video and 32.53 dB for the laser shadowgraph video with unrelated masks (rotated channel 1). The simulation results show that the time-space-evolving process of plasma distribution can be well retold, and the phenomenon of plasma instability can be accurately diagnosed by the dual-channel CUP with unrelated masks (rotated channel 1). This study may promote the practical applications of the CUP in the field of accelerator physics.
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Affiliation(s)
- Z M Yao
- State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an 710024, China
| | - L Sheng
- State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an 710024, China
| | - Y Song
- State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an 710024, China
| | - D W Hei
- State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an 710024, China
| | - Y Li
- State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an 710024, China
| | - Z J Zhu
- State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an 710024, China
| | - H Y Zhou
- Department of Engineering Physics, Tsinghua University, Beijing 100083, China
| | - W P Yan
- State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an 710024, China
| | - C C Han
- State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an 710024, China
| | - B J Duan
- State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an 710024, China
| | - K X Yang
- State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an 710024, China
| | - B D Peng
- State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an 710024, China
| | - S A Zhang
- State Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University, Shanghai 200062, China
| | - D L Qi
- State Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University, Shanghai 200062, China
| | - C Z Jin
- State Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University, Shanghai 200062, China
| | - Y H Yao
- State Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University, Shanghai 200062, China
| | - Z Q Huang
- State Key Laboratory of Precision Spectroscopy, School of Physics and Electronic Science, East China Normal University, Shanghai 200062, China
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Hao B, Xu W, Gao W, Huang T, Lyu L, Lyu D, Xiao H, Li H, Qin J, Sheng L, Liu H. Association between Frailty Assessed Using Two Electronic Medical Record-Based Frailty Assessment Tools and Long-Term Adverse Prognosis in Older Critically Ill Survivors. J Nutr Health Aging 2023; 27:649-655. [PMID: 37702338 DOI: 10.1007/s12603-023-1961-6] [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: 06/13/2023] [Accepted: 07/20/2023] [Indexed: 09/14/2023]
Abstract
OBJECTIVES Frailty has become an independent risk factor for adverse outcomes in critically ill patients. This study aimed to explore the predictive ability of two electronic medical record-based frailty assessment tools, the Hospital Frailty Risk Score (HFRS) and Frailty Index based on physiological and laboratory tests (FI-lab), for long-term adverse prognosis in older critically ill survivors. DESIGN Retrospective observational study. SETTING AND PARTICIPANTS 9,082 critically ill survivors aged ≥ 65 years. MEASUREMENTS The HFRS and the 33-item FI-lab were constructed based on the published literature. Cox and logistic regression models assessed the association between frailty and 1-year mortality and post-discharge care needs. RESULTS 2,586 patients died within 1 year of follow-up. In fully adjusted models, frailty assessed using both the HFRS (per point, hazard ratio [HR] 1.06, 95% confidential interval [CI] 1.05-1.06; intermediate frailty risk, HR 2.00, 95% CI 1.78-2.25; high frailty risk, HR 3.06, 95% CI 2.68-3.50) and FI-lab (per 0.01 points, HR 1.03, 95% CI 1.03-1.03; intermediate frailty risk, HR 1.59, 95% CI 1.44-1.76; high frailty risk, HR 2.30, 95% CI 2.06-2.57) was associated with mortality. Addition of frailty indicators improved the predictive validity of the Sequential Organ Failure Assessment score for mortality (HFRS alone ∆ C-index 0.034; FI-lab alone ∆ C-index 0.016; HFRS and FI-lab combined ∆ C-index 0.042). The HFRS but not the FI-lab was associated with higher probability of post-discharge care needs. CONCLUSION Both the HFRS and FI-lab could independently predict 1-year mortality in older critically ill survivors. Adding the HFRS to the SOFA score model improved it more than adding the FI-lab. The greatest improvement was achieved when both frailty indicators were used together. These findings suggest that electronic medical record-based frailty assessment methods can be useful tools for predicting long-term outcomes in older critically ill patients.
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Affiliation(s)
- B Hao
- Li Sheng, Department of Cardiology, The Second Medical Centre, Chinese PLA General Hospital, Beijing, China, ; Hongbin Liu, Department of Cardiology, The Second Medical Centre, Chinese PLA General Hospital, Beijing, China, e-mail:
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Zhou J, Tang Y, Duan J, Sheng L, Yang Q, Wang X. Response and Survival in Patients of BCLC Stage C Hepatocellular Carcinoma Receiving SBRT and Immunotherapy. Int J Radiat Oncol Biol Phys 2022. [DOI: 10.1016/j.ijrobp.2022.07.1088] [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]
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Song Y, Zhang M, Duan BJ, Yan WP, Sheng L, Song GZ, Ma JM, Han CC, Yao ZM. A high-speed radiation imaging system based on liquid scintillator filled capillary arrays. Rev Sci Instrum 2022; 93:033702. [PMID: 35365019 DOI: 10.1063/5.0066686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Accepted: 02/20/2022] [Indexed: 06/14/2023]
Abstract
A high-speed radiation imaging system based on an image converter of liquid scintillator filled capillary arrays has been developed, which is sensitive to x rays, gamma rays, and neutrons. This imaging system has advantages of both high spatial resolution and high sensitivity because increasing the thickness of the image converter only leads to little deterioration on imaging resolution. The capillary arrays have dimensions of 150 mm diameter and 50 mm thickness, with 100 µm diameter of each capillary. The fluorescence decay time of the filled liquid scintillator based on the mixture of p-xylene and 2,5-diphenyloxazole has been evaluated to be ∼3 ns with the single photon method under the gamma ray excitation. The spatial resolution has been experimentally evaluated to be about 1.15 and 0.6 mm, under excitation of x rays and neutrons, respectively. The imaging system has been applied for diagnosing the dynamic x-ray spot generated by the rod pinch. Two frames in single shot with 15 ns temporal resolution and 20 ns inter-frame separation time have been obtained, which show the spatiotemporal distribution of the electrons bombarding the tungsten rod, indicating the ability of this imaging system in diagnosing dynamic radiation objects. In addition, the technique of capillary arrays provides a promising path for applications of advanced liquid scintillators in the field of radiation imaging.
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Affiliation(s)
- Y Song
- State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an, China
| | - M Zhang
- State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an, China
| | - B J Duan
- State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an, China
| | - W P Yan
- State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an, China
| | - L Sheng
- State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an, China
| | - G Z Song
- State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an, China
| | - J M Ma
- State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an, China
| | - C C Han
- State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an, China
| | - Z M Yao
- State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an, China
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Yao L, Liu J, Cao Z, Sheng L. Study of the intentional replantation procedure used to treat a tooth with a palatogingival groove: A case report. J Clin Exp Dent 2022; 14:e205-e210. [PMID: 35173905 PMCID: PMC8842287 DOI: 10.4317/jced.59099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2021] [Accepted: 01/17/2022] [Indexed: 11/05/2022] Open
Abstract
In order to clarify the prognosis of intentional replantation used for palatogingival groove treatment for long-term follow-up observation, the case of a patient with a maxillary lateral incisor with palatogingival groove was investigated. The intentional replantation was carried out to preserve the tooth. The periodontal pocket and the apical bone defect were almost completely repaired at 12-month follow-up. However, the infection was reoccurred after 25-month follow-up examinations. The infected tooth was extracted, of which the root was investigated by histological analysis. Therefore, the reason of the replant failure and the pathways of bacterial infection was investigated. Key words:Palatogingival groove, intentional tooth replantation, bacterial infection, maxillary lateral incisor.
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Sun DH, Gong YT, Wang DY, Sheng L, Xue JY, Li S, Li Y. [A novel technique for management of long in-stent chronic total occlusions: Anchor-Knuckle technique: two case reports]. Zhonghua Xin Xue Guan Bing Za Zhi 2021; 49:813-815. [PMID: 34404192 DOI: 10.3760/cma.j.cn112148-20210329-00279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Affiliation(s)
- D H Sun
- Department of Cardiology, First Affiliated Hospital of Harbin Medical University, Harbin 150001, China
| | - Y T Gong
- Department of Cardiology, First Affiliated Hospital of Harbin Medical University, Harbin 150001, China
| | - D Y Wang
- Department of Cardiology, First Affiliated Hospital of Harbin Medical University, Harbin 150001, China
| | - L Sheng
- Department of Cardiology, First Affiliated Hospital of Harbin Medical University, Harbin 150001, China
| | - J Y Xue
- Department of Cardiology, First Affiliated Hospital of Harbin Medical University, Harbin 150001, China
| | - S Li
- Department of Cardiology, First Affiliated Hospital of Harbin Medical University, Harbin 150001, China
| | - Y Li
- Department of Cardiology, First Affiliated Hospital of Harbin Medical University, Harbin 150001, China
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Zeng J, Cui X, Cheng L, Chen Y, Du X, Sheng L. Liposome-paclitaxel and carboplatin combination chemoradiotherapy for patients with locally advanced esophageal squamous cell carcinoma. Cancer Radiother 2021; 25:441-446. [PMID: 33958272 DOI: 10.1016/j.canrad.2021.01.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2020] [Revised: 01/11/2021] [Accepted: 01/19/2021] [Indexed: 12/01/2022]
Abstract
PURPOSE The aim of this study was to evaluate the efficacy of liposome-paclitaxel and carboplatin combination chemoradiotherapy for patients with locally advanced esophageal squamous cell carcinoma (ESCC). PATIENTS AND METHODS Seventy-nine consecutive patients treated with liposome-paclitaxel based concurrent chemoradiotherapy between January 2015 and December 2019 at Cancer hospital of the University of Chinese Academy of Sciences (Zhejiang cancer hospital) were enrolled in this study. The overall response, toxicities, progression-free survival and overall survival were analyzed with SPSS software. RESULTS A total of 302 cycles of weekly chemotherapy were delivered, with a median 4 courses. After concurrent chemoradiotherapy (CCRT), the efficacy was classified as CR in 4 cases (5.1%), PR in 22 cases (28.2%) and SD in 51 cases (65.4%). The median PFS and OS time were 18.2 months and 23.4 months. The 3-year PFS and OS rates were 45.1% and 43.6%, respectively. CONCLUSIONS Liposome-paclitaxel and carboplatin concurrent with radiotherapy is a safe and effective modality for locally advanced ESCC. Further clinical investigation are warranted to evaluate the efficacy of this regimen.
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Affiliation(s)
- J Zeng
- Department of Thoracic surgery, Cancer hospital of the University of Chinese Academy of Sciences (Zhejiang cancer hospital), Hangzhou, Zhejiang, China; Key Laboratory Diagnosis and Treatment Technology on Thoracic Oncology, Zhejiang, China
| | - X Cui
- Department of Radiotherapy, Cancer hospital of the University of Chinese Academy of Sciences (Zhejiang cancer hospital), 1, Banshandong road, 310022 Hangzhou, Zhejiang, China; Key Laboratory Diagnosis and Treatment Technology on Thoracic Oncology, Zhejiang, China; The Second Clinical Medical College, Zhejiang Chinese Medical University
| | - L Cheng
- Department of Radiotherapy, Cancer hospital of the University of Chinese Academy of Sciences (Zhejiang cancer hospital), 1, Banshandong road, 310022 Hangzhou, Zhejiang, China; Key Laboratory Diagnosis and Treatment Technology on Thoracic Oncology, Zhejiang, China
| | - Y Chen
- Department of Radiotherapy, Cancer hospital of the University of Chinese Academy of Sciences (Zhejiang cancer hospital), 1, Banshandong road, 310022 Hangzhou, Zhejiang, China; Key Laboratory Diagnosis and Treatment Technology on Thoracic Oncology, Zhejiang, China
| | - X Du
- Department of Radiotherapy, Cancer hospital of the University of Chinese Academy of Sciences (Zhejiang cancer hospital), 1, Banshandong road, 310022 Hangzhou, Zhejiang, China; Key Laboratory Diagnosis and Treatment Technology on Thoracic Oncology, Zhejiang, China
| | - L Sheng
- Department of Radiotherapy, Cancer hospital of the University of Chinese Academy of Sciences (Zhejiang cancer hospital), 1, Banshandong road, 310022 Hangzhou, Zhejiang, China; Key Laboratory Diagnosis and Treatment Technology on Thoracic Oncology, Zhejiang, China.
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Luo F, Tany Y, Sun H, Liu J, Sheng L. Study Frequency Shift Evaluation of Ultrasound in Fresh and Frozen-thawed Tissues of Cryosurgery by AR Model. Cryo Letters 2020; 41:140-144. [PMID: 33988643] [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: 06/12/2023]
Abstract
BACKGROUND Noninvasive monitoring of cryosurgery is important for performing precise monitoring of the freezing process in situ and evaluating postoperative effects after therapy. One potential approach is to monitor the normal and freeze-thawed tissues through ultrasonic backscattered signal processing. OBJECTIVE A noninvasive method for cryosurgery monitoring based on the analysis of microstructural characteristics of in vitro porcine liver tissues at different state including normal and freeze-thawed tissues by estimating the center frequency of scatterers (CFS) using the autoregressive (AR) cepstrum of ultrasonic backscattered signals. MATERIALS AND METHODS The method is based on the discrete scattering model described in the tissue characterization literature and the observation that most biological tissues are semi-regular scattering lattices. A total of ten in vitro porcine liver samples were used and freeze by water bath in the experiments. RESULTS Experimental results show that the CFS in porcine liver tissues decreases after pre-frozen and then thawed. CONCLUSION The CFS obtained using this method may be used as a characteristic parameter for tissue characterization in noninvasive monitoring the transition zone between frozen and unfrozen tissues during the surgical therapy, and evaluating postoperative effects.
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Affiliation(s)
- F Luo
- Beijing Key Laboratory of Pre-clinical Research and Evaluation for Cardiovascular Implant Materials, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Centre for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Y Tany
- Beijing Key Laboratory of Pre-clinical Research and Evaluation for Cardiovascular Implant Materials, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Centre for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - H Sun
- Center of Cardiac Surgery for Adults, State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Centre for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.
| | - J Liu
- Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China
| | - L Sheng
- Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China.
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Nilsson M, Sun H, Robichaux J, Diao L, Xi Y, Tong P, Sheng L, Hofstad M, Kawakami M, Le X, Liu X, Fang Y, Poteete A, Vailati Negrao M, Tran H, Dmitrovsky E, Peng D, Gibbons D, Wang J, Heymach J. IA34 The YAP/FOXM1 Axis Regulates EMT-Associated EGFR Tyrosine Kinase Inhibitor Resistance and Increased Expression of Spindle Assembly Checkpoint Components. J Thorac Oncol 2020. [DOI: 10.1016/j.jtho.2019.12.123] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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13
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Li XS, Wang C, Deng MX, Duan HJ, Fu PH, Wang RQ, Sheng L, Xing DY. Photon-Induced Weyl Half-Metal Phase and Spin Filter Effect from Topological Dirac Semimetals. Phys Rev Lett 2019; 123:206601. [PMID: 31809106 DOI: 10.1103/physrevlett.123.206601] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2019] [Revised: 09/06/2019] [Indexed: 06/10/2023]
Abstract
Recently discovered Dirac semimetals (DSMs) with two Dirac nodes, such as Na_{3}Bi and Cd_{2}As_{3}, are regarded as carrying the Z_{2} topological charge in addition to the chiral charge. We study the Floquet phase transition of Z_{2} topological DSMs subjected to a beam of circularly polarized light. Owing to the resulting interplay of the chiral and Z_{2} charges, the Weyl nodes are not only chirality dependent but also spin dependent, which constrains the behavior in creation and annihilation of the pair of Weyl nodes. Interestingly, we find a novel phase: One spin band is in the Weyl semimetal phase while the other is in the insulator phase, and we dub it the Weyl half-metal (WHM) phase. We further study the spin-dependent transport in a Dirac-Weyl semimetal junction and find a spin filter effect as a fingerprint of the existence of the WHM phase. The proposed spin filter effect, based on the WHM bulk band, is highly tunable in a broad parameter regime and robust against magnetic disorder, which is expected to overcome the shortcomings of the previously proposed spin filter based on the topological edge or surface states. Our results offer a unique opportunity to explore the potential applications of topological DSMs in spintronics.
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Affiliation(s)
- Xiao-Shi Li
- Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, GPETR Center for Quantum Precision Measurement, SPTE, South China Normal University, Guangzhou 510006, China
| | - Chen Wang
- Lab for Computational Imaging Technology and Engineering, School of Electronic Science and Engineering, Nanjing University, Nanjing 210023, China
| | - Ming-Xun Deng
- Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, GPETR Center for Quantum Precision Measurement, SPTE, South China Normal University, Guangzhou 510006, China
| | - Hou-Jian Duan
- Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, GPETR Center for Quantum Precision Measurement, SPTE, South China Normal University, Guangzhou 510006, China
| | - Pei-Hao Fu
- Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, GPETR Center for Quantum Precision Measurement, SPTE, South China Normal University, Guangzhou 510006, China
| | - Rui-Qiang Wang
- Guangdong Provincial Key Laboratory of Quantum Engineering and Quantum Materials, GPETR Center for Quantum Precision Measurement, SPTE, South China Normal University, Guangzhou 510006, China
| | - L Sheng
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China
| | - D Y Xing
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China
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14
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Shi HZ, Wang D, Sun XN, Sheng L. MicroRNA-378 acts as a prognosis marker and inhibits cell migration, invasion and epithelial-mesenchymal transition in human glioma by targeting IRG1. Eur Rev Med Pharmacol Sci 2019; 22:3837-3846. [PMID: 29949160 DOI: 10.26355/eurrev_201806_15268] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
OBJECTIVE Glioma is one common intracranial malignancy. Recently, there has been a large volume of published studies describing the functions of microRNAs as potential diagnostic markers for glioma. Data from several sources revealed that miR-378 played crucial roles in multiple tumors. However, much uncertainty still exists about the functions and underlying mechanism of miR-378. The purpose of the present work was to evaluate the potential effect of miR-378 and verify its influence on the function of IRG1 in glioma. PATIENTS AND METHODS The miR-378 expression was examined in 52 pairs of glioma tissues using quantitative Real-Time Polymerase Chain Reaction (qRT-PCR). Transwell assays were conducted to detect the capability of glioma cell migration and invasion with different transfections. Luciferase reporter was used to confirm whether miR-378 could regulate immune responsive gene 1 (IRG1). Western blot was used to measure the expressions of EMT-related markers. RESULTS miR 378 expressions were notably reduced in glioma cells and tissues in comparison with controls. The declined miR-378 expressions were correlated with the poor OS and worse clinicopathological parameters of glioma patients. Overexpression of miR-378 repressed glioma cell epithelial-mesenchymal transition (EMT) and metastasis as well as the tumor growth rate and tumor size of glioma mice. Additionally, IRG1 was markedly up-regulated in glioma and was confirmed as a direct target for miR 378 in glioma. CONCLUSIONS We showed that the suppressive role of miR-378 in glioma, which was regulated by IRG1, suggested that the miR-378/IRG1 axis may be an effective target for glioma treatment.
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Affiliation(s)
- H-Z Shi
- Department of Neurosurgery, Yantaishan Hospital, Yantai, China.
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15
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Gao CJ, Huang XM, Chen ZP, Sheng L, Xu J, Li Y, Li XY, Zhang R, Yu ZY, Zha BB, Wu YY, Yang M, Ding HY, Sun TG, Zhang YQ, Ma L, Liu J. [High level of hemoglobin during the first trimester of pregnancy associated with the risk of gestational diabetes mellitus]. Zhonghua Fu Chan Ke Za Zhi 2019; 54:654-659. [PMID: 31648440 DOI: 10.3760/cma.j.issn.0529-567x.2019.10.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [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 explore the relationship between hemoglobin (Hb) level during the first trimester of pregnancy and gestational diabetes mellitus (GDM). Methods: A total of 1 276 participants, who underwent scheduled prenatal examination and normal singleton delivery at the Fifth People's Hospital of Shanghai and Hospital of Intergrated Chinese and Western Medicine in Minhang District, from January 2016 to May 2018 were included. There were 99 cases of GDM (GDM group) and 1 177 cases of normal (control group) pregnant women.Based on the serum Hb level during the first trimester of pregnancy, participants were divided into three groups, 236 cases of low Hb level group (Hb<110 g/L), 868 cases of normal Hb level group (110 g/L≤Hb<130 g/L), and 172 cases of high Hb level group (Hb≥130 g/L). Maternal clinical data were collected, including Hb level during the first trimester of pregnancy, three-point blood glucose (BG) of oral glucose tolerance test (OGTT) and fasting insulin during the second trimester of pregnancy. Homeostasis model assessment of insulin resistance index (HOMA-IR) and homeostasis model assessment of pancreatic β cell function index (HOMA-β) were used to evaluate insulin resistance and pancreatic β cell function. Results: (1) Hb level during the first trimester of pregnancy in GDM group was significantly higher than that in control group [(123±10),(119±11) g/L, P<0.05]. There were no significant difference in gravidity, parity, index of liver and renal function (all P>0.05). (2) Pre-pregnancy body mass index (BMI), 1-hour BG and 2-hour BG of OGTT were significantly increased in the high Hb level group during the first trimester of pregnancy, which were (23±4) kg/m(2), (7.3±2.0) mmol/L, and (6.5±1.4) mmol/L (P<0.05), respectively. The pre-pregnancy BMI, 1-hour BG and 2-hour BG of the normal or low Hb level group were (22±3) kg/m(2), (6.7±1.6) mmol/L, (6.1±1.2) mmol/L; (22±3) kg/m(2), (6.5±1.5) mmol/L, (5.9±1.1) mmol/L, respectively. There were no statistically significant difference in levels of fasting blood glucose, fasting insulin, HOMA-IR and HOMA-β within 3 groups (all P>0.05). (3) In the high Hb level group, prevalence of pregnancy overweight or obesity and GDM were the highest, which were 37.2%(64/172) and 15.1%(26/172), respectively; the differences were statistically significant (all P<0.05). (4) The serum Hb level in the first trimester was positively related with pre-pregnancy BMI (r=0.130, P<0.05), 1-hour BG (r=0.129, P<0.05), 2-hour BG (r=0.134, P<0.05), fasting insulin (r=0.096, P<0.05), and HOMA-IR (r=0.101, P<0.05).Logistic regression indicated that Hb≥130 g/L during the first trimester of pregnancy was an independent risk factor for GDM (OR=2.799, 95%CI: 1.186-6.604; P<0.05). Conclusion: The high level of Hb (Hb≥130 g/L) during the first trimester of pregnancy is associated with GDM.
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Affiliation(s)
- C J Gao
- Department of Obstetrics and Gynecology, Hospital of Intergrated Chinese and Western Medicine in Minhang District, Shanghai 200241, China
| | - X M Huang
- Department of Endocrinology, the Fifth People's Hospital of Shanghai, Fudan University, Shanghai 200240, China
| | - Z P Chen
- Department of Endocrinology, the Fifth People's Hospital of Shanghai, Fudan University, Shanghai 200240, China
| | - L Sheng
- Department of Endocrinology, the Fifth People's Hospital of Shanghai, Fudan University, Shanghai 200240, China
| | - J Xu
- Department of Endocrinology, the Fifth People's Hospital of Shanghai, Fudan University, Shanghai 200240, China
| | - Y Li
- Department of Endocrinology, the Fifth People's Hospital of Shanghai, Fudan University, Shanghai 200240, China
| | - X Y Li
- Department of Endocrinology, the Fifth People's Hospital of Shanghai, Fudan University, Shanghai 200240, China
| | - R Zhang
- Department of Endocrinology, the Fifth People's Hospital of Shanghai, Fudan University, Shanghai 200240, China
| | - Z Y Yu
- Department of Endocrinology, the Fifth People's Hospital of Shanghai, Fudan University, Shanghai 200240, China
| | - B B Zha
- Department of Endocrinology, the Fifth People's Hospital of Shanghai, Fudan University, Shanghai 200240, China
| | - Y Y Wu
- Department of Endocrinology, the Fifth People's Hospital of Shanghai, Fudan University, Shanghai 200240, China
| | - M Yang
- Department of Endocrinology, the Fifth People's Hospital of Shanghai, Fudan University, Shanghai 200240, China
| | - H Y Ding
- Department of Endocrinology, the Fifth People's Hospital of Shanghai, Fudan University, Shanghai 200240, China
| | - T G Sun
- Department of Endocrinology, the Fifth People's Hospital of Shanghai, Fudan University, Shanghai 200240, China
| | - Y Q Zhang
- Department of Obstetrics and Gynecology, Hospital of Intergrated Chinese and Western Medicine in Minhang District, Shanghai 200241, China
| | - L Ma
- Department of Obstetrics and Gynecology, Hospital of Intergrated Chinese and Western Medicine in Minhang District, Shanghai 200241, China
| | - J Liu
- Department of Endocrinology, the Fifth People's Hospital of Shanghai, Fudan University, Shanghai 200240, China
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Luo W, Deng MX, Deng WY, Sheng L. Topological valley pumping in Weyl semimetals. J Phys Condens Matter 2019; 31:125502. [PMID: 30630133 DOI: 10.1088/1361-648x/aafd61] [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: 06/09/2023]
Abstract
We investigate the topological pumping effect in Weyl semimetals, subject to the modulation of two ac electric fields along y and z directions, respectively. We show that the pumping effect originates from the anomalous velocity related to the Berry curvature. The direction of the pumping current is dependent on the chirality of the Weyl fermions. While the total particle current is vanishing because the Weyl points of opposite chirality always come in pairs in Weyl semimetals, the pump gives rise to a net chirality current or valley current. The noiseless valley current generated can be useful in valleytronic applications.
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Affiliation(s)
- Wei Luo
- School of Science, Jiangxi University of Science and Technology, Ganzhou 341000, People's Republic of China
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17
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Deng MX, Qi GY, Ma R, Shen R, Wang RQ, Sheng L, Xing DY. Quantum Oscillations of the Positive Longitudinal Magnetoconductivity: A Fingerprint for Identifying Weyl Semimetals. Phys Rev Lett 2019; 122:036601. [PMID: 30735409 DOI: 10.1103/physrevlett.122.036601] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 11/06/2018] [Indexed: 06/09/2023]
Abstract
Weyl semimetals (WSMs) host charged Weyl fermions as emergent quasiparticles. We develop a unified analytical theory for the anomalous positive longitudinal magnetoconductivity (LMC) in a WSM, which bridges the gap between the classical and ultraquantum approaches. More interestingly, the LMC is found to exhibit periodic-in-1/B quantum oscillations, originating from the oscillations of the nonequilibrium chiral chemical potential. The quantum oscillations, superposed on the positive LMC, are a remarkable fingerprint of a WSM phase with a chiral anomaly, whose observation is a valid criteria for identifying a WSM material. In fact, such quantum oscillations were already observed by several experiments.
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Affiliation(s)
- Ming-Xun Deng
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China
- Laboratory of Quantum Engineering and Quantum Materials, ICMP and SPTE, South China Normal University, Guangzhou 510006, China
| | - G Y Qi
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China
| | - R Ma
- Jiangsu Key Laboratory for Optoelectronic Detection of Atmosphere and Ocean, Nanjing University of Information Science and Technology, Nanjing 210044, China
| | - R Shen
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - Rui-Qiang Wang
- Laboratory of Quantum Engineering and Quantum Materials, ICMP and SPTE, South China Normal University, Guangzhou 510006, China
| | - L Sheng
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - D Y Xing
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
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Wang G, Liu J, Luo J, Sheng L. Texture Feature Differences between Fresh and Frozen-thawed Ex-vivo Porcine Liver Tissue in B-mode Ultrasonic Imaging. Cryo Letters 2019; 40:58-63. [PMID: 30955032] [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: 06/09/2023]
Abstract
BACKGROUND Ultrasound guidance of cryotherapy could be improved if changes of tissue characterization parameters during freezing could be used to monitor freezing profiles and estimate frostbite distributions. OBJECTIVE To investigate if B-mode ultrasonic imaging can provide sufficient information to define the damaged zone during cryotherapy by quantifying the differences of texture features between fresh and frozen-thawed porcine liver tissue. MATERIALS AND METHODS The B-mode ultrasonic images were obtained from ten porcine liver tissue samples before and after frozen-thawing treatment, then 20 texture parameters of the grey level histogram (GLH) and the grey level co-occurrence matrix (GLCM) from each image were extracted and analyzed statistically. RESULTS It was found that the differences in two texture parameters between the fresh and frozen-thawed tissue are significant enough for diagnostic purpose (variance: 317.0%, contrast: 144.4%). CONCLUSION Texture feature analysis of B-mode ultrasonic images can effectively differentiate the fresh and frozen-thawed porcine liver tissues, which offers a prospect for the future practice of evaluating the effectiveness of cryotherapy using Ultrasound.
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Affiliation(s)
- G Wang
- Industrial Design Engineering, Delft University of Technology, Delft, Netherlands
| | - J Liu
- Department of Biomedical Engineering, Tsinghua University, Beijing, China
| | - J Luo
- Department of Biomedical Engineering, Tsinghua University, Beijing, China
| | - L Sheng
- Key Laboratory of Cryogenics, Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, China.
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19
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Frese C, Wohlrab T, Sheng L, Kieser M, Krisam J, Frese F, Wolff D. Clinical management and prevention of dental caries in athletes: A four-year randomized controlled clinical trial. Sci Rep 2018; 8:16991. [PMID: 30451891 PMCID: PMC6242938 DOI: 10.1038/s41598-018-34777-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [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: 05/18/2018] [Accepted: 10/23/2018] [Indexed: 02/01/2023] Open
Abstract
The aims of this four-year randomized controlled clinical trial were to gain insights into management and prevention of dental caries and the effect of stannous fluoride products in athletes. Fifty-four participants were randomized into test and control groups. The test group used special stannous fluoride products. The primary endpoint dental caries was assessed by the ICDAS-II-System and analyzed both by a linear mixed model for repeated measures and a generalized linear mixed model. During the observation period an increase in caries-free surfaces from 64.91 ± 6.42 at baseline to 73.22 ± 4.43 was observed. In surfaces with caries superficialis and caries media, a decrease from 13.94 ± 5.70 and 2.96 ± 2.55 surfaces at baseline to 7.89 ± 3.18 and 0.46 ± 0.78 after 2.5 years was noted, respectively. The analysis showed no effect of stannous fluoride products, but a significant difference for the time of examination (p < 0.0001). In addition, it could be shown that at any time of examination, the odds of developing caries media on a new surface was significantly lower than at baseline (up to 25-times). Due to biannual dental examinations, professional tooth cleaning and restorative treatment the number of caries-free surfaces increased and the odds of a new surface to be afflicted with caries media decreased 25-fold.
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Affiliation(s)
- C Frese
- Department of Conservative Dentistry, School of Dental Medicine, University Hospital, Heidelberg, Germany.
| | - T Wohlrab
- Department of Conservative Dentistry, School of Dental Medicine, University Hospital, Heidelberg, Germany
| | - L Sheng
- Institute of Medical Biometry and Informatics, Ruprecht Karls University, Heidelberg, Germany
| | - M Kieser
- Institute of Medical Biometry and Informatics, Ruprecht Karls University, Heidelberg, Germany
| | - J Krisam
- Institute of Medical Biometry and Informatics, Ruprecht Karls University, Heidelberg, Germany
| | - F Frese
- Clinic St. Elisabeth, Private Practice for Sports Medicine, Heidelberg, Germany
| | - D Wolff
- Department of Conservative Dentistry, School of Dental Medicine, University Hospital Tübingen, Tübingen, Germany
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Shi Q, Xia L, Zhou J, Wang Z, Sheng L, Wang G, Wang L, Cheng X, Wang F, Kong F, Zhao F, Li X, Ye B, Mei L, Liu Y, Pan L, Xie J, Cheng G, Li X. Apatinib plus S-1 as second-line or later line treatment for advanced squamous cell lung carcinoma. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy425.013] [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: 11/15/2022] Open
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21
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Deng MX, Ma R, Luo W, Shen R, Sheng L, Xing DY. Time-reversal invariant resonant backscattering on a topological insulator surface driven by a time-periodic gate voltage. Sci Rep 2018; 8:12338. [PMID: 30120262 PMCID: PMC6098087 DOI: 10.1038/s41598-018-29950-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 07/18/2018] [Indexed: 11/11/2022] Open
Abstract
We study the scattering of the Dirac electrons by a point-like nonmagnetic impurity on the surface of a topological insulator, driven by a time-periodic gate voltage. It is found that, due to the doublet degenerate crossing points of different Floquet sidebands, resonant backscattering can happen for the surface electrons, even without breaking the time-reversal (TR) symmetry of the topological surface states (TSSs). The energy spectrum is reshuffled in a way quite different from that for the circularly polarized light, so that new features are exhibited in the Friedel oscillations of the local charge and spin density of states. Although the electron scattering is dramatically modified by the driving voltage, the 1/ρ scale law of the spin precession persists for the TSSs. The TR invariant backscattering provides a possible way to engineer the Dirac electronic spectrum of the TSSs, without destroying the unique property of spin-momentum interlocking of the TSSs.
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Affiliation(s)
- Ming-Xun Deng
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China.,Laboratory of Quantum Engineering and Quantum Materials, ICMP and SPTE, South China Normal University, Guangzhou, 510006, China
| | - R Ma
- Jiangsu Key Laboratory for Optoelectronic Detection of Atmosphere and Ocean, Nanjing University of Information Science and Technology, Nanjing, 210044, China
| | - Wei Luo
- School of Science, Jiangxi University of Science and Technology, Ganzhou, 341000, China
| | - R Shen
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China.,Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - L Sheng
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China. .,Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China.
| | - D Y Xing
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China.,Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
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Sheng L, Soumillion A, Peerlinck K, Verslype C, Schelstraete R, Gyselinck F, Emonds MP, Hess G, Vermylen J, Desmyter J, Yap SH. Anti-hepatitis G E2 Antibody Detection and Its Relation to Serum HGV-RNA in Patients with Clotting Disorders: High Prevalence of HGV Infection and Spontaneous Remission. Thromb Haemost 2017. [DOI: 10.1055/s-0037-1615059] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
SummaryIn a previous study, we have determined the prevalence of serum HGV-RNA in patients with congenital clotting disorders. Twenty-six (15%) of 175 patients investigated were serum HGV-RNA positive. In addition, HGV-RNA was detectable in peripheral blood mononuclear cells (PBMC) in ten percent of the cases, three of these patients were serum HGV-RNA negative.In the present study, we have determined the prevalence of anti-HGV-E2 antibodies in the same patient population. Anti-HGV-E2 as determined by ELISA was detected in 45 patients (25.7%). Forty of these patients were serum HGV-RNA negative.Ninety-two percent of the 26 HGV viremic patients and all but one patient (44 patients) with detectable anti-HGV-E2 had coinfection with the hepatitis C virus (HCV). Of these coinfected patients, 62.5% of HGV viremic patients and 53% of anti-HGV-E2 positive patients showed elevated serum ALT levels. Anti-HGV-E2 seroconversion is thus not associated with HCV infection. Two patients who were solely infected with HGV had normal serum ALT levels. In a retrospective longitudinal study, we have observed in 15 patients that serum HGV-RNA persisted during one to 19 years of follow-up, while anti-HGV-E2 was repeatedly negative. Five additional patients who were anti-HGV-E2 positive with concomitant detectable HGV-RNA (4 patients in serum and 1 patient in PBMC) became HGV-RNA negative during follow-up, ranging from 1 to 8 years after the first detection of anti-HGV-E2 antibodies. Two patients had lost anti-HGV-E2 antibodies 3 to 6 years after the seroconversion without the re-appearance of serum HGV-RNA. From these findings, it is clear that the prevalence rate of HGV infection in patients with clotting disorders as determined by PCR assay for HGV-RNA and anti-HGV-E2 by ELISA is actually higher than the prevalence of HGV viremia. Although HGV viremia may persist for longer than 19 years, most of the patients infected with HGV may clear the viremia spontaneously. The clearance of viremia is usually associated with seroconversion to anti-HGVE2. In addition, anti-HGV-E2 may be lost during years of follow-up without the reappearance of the HGV-RNA. Although HGV infection does not seem to influence the fate of HCV infection and does not induce increased levels of serum ALT, the clinical significance of long-term infection remains to be established.
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Deng WY, Ren YJ, Lin ZX, Shen R, Sheng L, Sheng DN, Xing DY. Analytical theory and possible detection of the ac quantum spin Hall effect. Sci Rep 2017; 7:5078. [PMID: 28698631 PMCID: PMC5505995 DOI: 10.1038/s41598-017-05452-4] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Accepted: 05/23/2017] [Indexed: 11/12/2022] Open
Abstract
We develop an analytical theory of the low-frequency ac quantum spin Hall (QSH) effect based upon the scattering matrix formalism. It is shown that the ac QSH effect can be interpreted as a bulk quantum pumping effect. When the electron spin is conserved, the integer-quantized ac spin Hall conductivity can be linked to the winding numbers of the reflection matrices in the electrodes, which also equal to the bulk spin Chern numbers of the QSH material. Furthermore, a possible experimental scheme by using ferromagnetic metals as electrodes is proposed to detect the topological ac spin current by electrical means.
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Affiliation(s)
- W Y Deng
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China.,Department of Physics, South China University of Technology, Guangzhou, 510640, China
| | - Y J Ren
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China
| | - Z X Lin
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China
| | - R Shen
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China
| | - L Sheng
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China. .,Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China.
| | - D N Sheng
- Department of Physics and Astronomy, California State University, Northridge, California, 91330, USA
| | - D Y Xing
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China.,Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
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Geng H, Luo W, Deng WY, Sheng L, Shen R, Xing DY. Theory of Inverse Edelstein Effect of The Surface States of A Topological Insulator. Sci Rep 2017; 7:3755. [PMID: 28623269 PMCID: PMC5473866 DOI: 10.1038/s41598-017-03346-z] [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] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Accepted: 04/27/2017] [Indexed: 11/24/2022] Open
Abstract
The surface states of three-dimensional topological insulators possess the unique property of spin-momentum interlocking. This property gives rise to the interesting inverse Edelstein effect (IEE), in which an applied spin bias μ is converted to a measurable charge voltage difference V. We develop a semiclassical theory for the IEE of the surface states of Bi2Se3 thin films, which is applicable from the ballistic regime to diffusive regime. We find that the efficiency of the spin-charge conversion, defined as γ = V/μ, exhibits a universal dependence on the ratio between sample size and electron mean free path. The efficiency increases from γ = π/4 in the ballistic limit to γ = π in the diffusive limit, suggesting that sufficient strength of impurity scattering is favorable for the IEE.
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Affiliation(s)
- H Geng
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China
| | - W Luo
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China
| | - W Y Deng
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China
| | - L Sheng
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China.
- Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China.
| | - R Shen
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - D Y Xing
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China
- Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
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25
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Xu D, Ren Z, Chen X, Zhuang Q, Hui S, Sheng L, Li S. The further exploration of hidden blood loss in posterior lumbar fusion surgery. Orthop Traumatol Surg Res 2017; 103:527-530. [PMID: 28300704 DOI: 10.1016/j.otsr.2017.01.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2016] [Revised: 12/06/2016] [Accepted: 01/06/2017] [Indexed: 02/02/2023]
Abstract
PURPOSE Hidden blood loss (HBL) plays an important role in lumbar fusion surgery. However, there was huge computation error when calculating hidden loss in previous studies because they regarded the volume of drainage as postoperative blood loss. We should not ignore the fact that the composition of drainage varies from person to person and also with time-lapse after operation. The purpose of this study was to demonstrate a more accurate HBL calculation formula by comparing it with previous formula and to address the importance of HBL in patients undergoing posterior lumbar fusion surgeries. METHODS For each patient, the HBL was calculated by previous formula and our recommendable formula. We compared the result of HBL calculated by two different methods. At the same time, we explored the HBL in patients undergoing posterior lumbar fusion surgeries with various levels. RESULTS In our study, the average total blood loss was 771ml. The mean intraoperative blood loss was 268ml, and the total volume of post-operative drainage is 276ml. The mean hidden loss of 90 patients calculated with previous method was 227ml and 29.4% of total loss. When taking change of drainage HCT into account, the mean hidden loss calculated with our recommendable method was 362.8ml and 47% of total loss. The results were significantly different (P<0.01). There was no significant difference in the percentage of the HBL between patients with single or multiple surgical levels. CONCLUSIONS There is often a substantial unmeasured blood loss in lumbar fusion surgeries. However, the component of drainage changed radically with time, we should take the true blood contained in drainage into considerations when calculating the HBL. LEVEL OF EVIDENCE Our research is a case-control study and the level of proof is III.
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Affiliation(s)
- D Xu
- Department of Orthorpaedic Surgery, Peking Union Medical College Hospital, Beijing, China.
| | - Z Ren
- Department of Orthorpaedic Surgery, Peking Union Medical College Hospital, Beijing, China.
| | - X Chen
- Department of Orthorpaedic Surgery, Peking Union Medical College Hospital, Beijing, China.
| | - Q Zhuang
- Department of Orthorpaedic Surgery, Peking Union Medical College Hospital, Beijing, China.
| | - S Hui
- Department of Orthorpaedic Surgery, Peking Union Medical College Hospital, Beijing, China.
| | - L Sheng
- Department of Orthorpaedic Surgery, Peking Union Medical College Hospital, Beijing, China.
| | - S Li
- Department of Orthorpaedic Surgery, Peking Union Medical College Hospital, Beijing, China.
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26
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Shakya R, Tarulli GA, Sheng L, Lokman NA, Ricciardelli C, Pishas KI, Selinger CI, Kohonen-Corish MRJ, Cooper WA, Turner AG, Neilsen PM, Callen DF. Mutant p53 upregulates alpha-1 antitrypsin expression and promotes invasion in lung cancer. Oncogene 2017; 36:4469-4480. [PMID: 28368395 DOI: 10.1038/onc.2017.66] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Revised: 02/05/2017] [Accepted: 02/05/2017] [Indexed: 12/13/2022]
Abstract
Missense mutations in the TP53 tumor-suppressor gene inactivate its antitumorigenic properties and endow the incipient cells with newly acquired oncogenic properties that drive invasion and metastasis. Although the oncogenic effect of mutant p53 transcriptome has been widely acknowledged, the global influence of mutant p53 on cancer cell proteome remains to be fully elucidated. Here, we show that mutant p53 drives the release of invasive extracellular factors (the 'secretome') that facilitates the invasion of lung cancer cell lines. Proteomic characterization of the secretome from mutant p53-inducible H1299 human non-small cell lung cancer cell line discovered that the mutant p53 drives its oncogenic pathways through modulating the gene expression of numerous targets that are subsequently secreted from the cells. Of these genes, alpha-1 antitrypsin (A1AT) was identified as a critical effector of mutant p53 that drives invasion in vitro and in vivo, together with induction of epithelial-mesenchymal transition markers expression. Mutant p53 upregulated A1AT transcriptionally through the involvement with its family member p63. Conditioned medium containing secreted A1AT enhanced cell invasion, while an A1AT-blocking antibody attenuated the mutant p53-driven migration and invasion. Importantly, high A1AT expression correlated with increased tumor stage, elevated p53 staining and shorter overall survival in lung adenocarcinoma patients. Collectively, these findings suggest that A1AT is an indispensable target of mutant p53 with prognostic and therapeutic potential in mutant p53-expressing tumors.
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Affiliation(s)
- R Shakya
- Centre for Personalised Cancer Medicine, Cancer Therapeutics Laboratory, School of Medicine, Faculty of Health Sciences, The University of Adelaide, Adelaide, South Australia, Australia
| | - G A Tarulli
- Dame Roma Mitchell Cancer Research Laboratories (DRMCRL), School of Medicine, Faculty of Health Sciences, The University of Adelaide, Adelaide, South Australia, Australia
| | - L Sheng
- Centre for Personalised Cancer Medicine, Cancer Therapeutics Laboratory, School of Medicine, Faculty of Health Sciences, The University of Adelaide, Adelaide, South Australia, Australia
| | - N A Lokman
- Discipline of Obstetrics and Gynaecology, School of Medicine, Faculty of Health Sciences, Robinson Research Institute, The University of Adelaide, Adelaide, South Australia, Australia.,Adelaide Proteomics Centre, School of Molecular and Biological Sciences, The University of Adelaide, Adelaide, South Australia, Australia
| | - C Ricciardelli
- Discipline of Obstetrics and Gynaecology, School of Medicine, Faculty of Health Sciences, Robinson Research Institute, The University of Adelaide, Adelaide, South Australia, Australia
| | - K I Pishas
- Centre for Personalised Cancer Medicine, Cancer Therapeutics Laboratory, School of Medicine, Faculty of Health Sciences, The University of Adelaide, Adelaide, South Australia, Australia
| | - C I Selinger
- Royal Prince Alfred Hospital, Camperdown, New South Wales, Australia
| | - M R J Kohonen-Corish
- The Kinghorn Cancer Centre, Garvan Institute of Medical Research, Sydney, New South Wales, Australia.,St Vincent's Clinical School, UNSW Australia, Sydney, New South Wales, Australia.,School of Medicine, University of Western Sydney, Parramatta, New South Wales, Australia
| | - W A Cooper
- School of Medicine, University of Western Sydney, Parramatta, New South Wales, Australia.,Tissue Pathology and Diagnostic Oncology, Royal Prince Alfred Hospital, Camperdown, New South Wales, Australia.,Sydney Medical School, University of Sydney, Sydney, New South Wales, Australia
| | - A G Turner
- Centre for Personalised Cancer Medicine, Cancer Therapeutics Laboratory, School of Medicine, Faculty of Health Sciences, The University of Adelaide, Adelaide, South Australia, Australia
| | - P M Neilsen
- Swinburne University of Technology Sarawak Campus, Kuching, Sarawak, Malaysia
| | - D F Callen
- Centre for Personalised Cancer Medicine, Cancer Therapeutics Laboratory, School of Medicine, Faculty of Health Sciences, The University of Adelaide, Adelaide, South Australia, Australia
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27
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Lv YY, Li X, Zhang BB, Deng WY, Yao SH, Chen YB, Zhou J, Zhang ST, Lu MH, Zhang L, Tian M, Sheng L, Chen YF. Experimental Observation of Anisotropic Adler-Bell-Jackiw Anomaly in Type-II Weyl Semimetal WTe_{1.98} Crystals at the Quasiclassical Regime. Phys Rev Lett 2017; 118:096603. [PMID: 28306288 DOI: 10.1103/physrevlett.118.096603] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Indexed: 06/06/2023]
Abstract
The asymmetric electron dispersion in type-II Weyl semimetal theoretically hosts anisotropic transport properties. Here, we observe the significant anisotropic Adler-Bell-Jackiw (ABJ) anomaly in the Fermi-level delicately adjusted WTe_{1.98} crystals. Quantitatively, C_{W}, a coefficient representing the intensity of the ABJ anomaly along the a and b axis of WTe_{1.98} are 0.030 and 0.051 T^{-2} at 2 K, respectively. We found that the temperature-sensitive ABJ anomaly is attributed to a topological phase transition from a type-II Weyl semimetal to a trivial semimetal, which is verified by a first-principles calculation using experimentally determined lattice parameters at different temperatures. Theoretical electrical transport study reveals that the observation of an anisotropic ABJ along both the a and b axes in WTe_{1.98} is attributed to electrical transport in the quasiclassical regime. Our work may suggest that electron-doped WTe_{2} is an ideal playground to explore the novel properties in type-II Weyl semimetals.
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Affiliation(s)
- Yang-Yang Lv
- 1National Laboratory of Solid State Microstructures & Department of Materials Science and Engineering, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Xiao Li
- National Laboratory of Solid State Microstructures & Department of Physics, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Bin-Bin Zhang
- 1National Laboratory of Solid State Microstructures & Department of Materials Science and Engineering, Nanjing University, Nanjing, Jiangsu 210093, China
| | - W Y Deng
- National Laboratory of Solid State Microstructures & Department of Physics, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Shu-Hua Yao
- 1National Laboratory of Solid State Microstructures & Department of Materials Science and Engineering, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Y B Chen
- National Laboratory of Solid State Microstructures & Department of Physics, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Jian Zhou
- 1National Laboratory of Solid State Microstructures & Department of Materials Science and Engineering, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Shan-Tao Zhang
- 1National Laboratory of Solid State Microstructures & Department of Materials Science and Engineering, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Ming-Hui Lu
- 1National Laboratory of Solid State Microstructures & Department of Materials Science and Engineering, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Lei Zhang
- High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei, Anhui 230031, China
| | - Mingliang Tian
- Collaborative Innovation Center of Advanced Microstructure, Nanjing University, Nanjing, Jiangsu 210093, China
- High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei, Anhui 230031, China
| | - L Sheng
- National Laboratory of Solid State Microstructures & Department of Physics, Nanjing University, Nanjing, Jiangsu 210093, China
- Collaborative Innovation Center of Advanced Microstructure, Nanjing University, Nanjing, Jiangsu 210093, China
| | - Yan-Feng Chen
- 1National Laboratory of Solid State Microstructures & Department of Materials Science and Engineering, Nanjing University, Nanjing, Jiangsu 210093, China
- Collaborative Innovation Center of Advanced Microstructure, Nanjing University, Nanjing, Jiangsu 210093, China
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28
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Song Y, Cao L, Peng BD, Song GZ, Yue ZQ, Ma JM, Sheng L, Li BK, Wang HX. Investigation of an InP-based image converter with optical excitation. Rev Sci Instrum 2017; 88:033109. [PMID: 28372373 DOI: 10.1063/1.4975993] [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: 06/07/2023]
Abstract
An image converter based on an indium phosphide has been developed to measure the two-dimensional spatial profile of the incident photon flux by probing the rapid change of the refractive index in the semiconductor. The spatial resolution, dynamic range, and temporal response of this image converter have been investigated with optical methods. The results show that the spatial resolution is ∼15 cycles/mm at the percent modulation transfer function of 0.5, the dynamic range is about 100, and the time response is in the order of 600 ps. This scheme can provide an alternative choice as an imaging diagnostic for experiments in the area of high-energy density physics.
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Affiliation(s)
- Y Song
- Institute of Wide Bandgap Semiconductors and Devices, Xi'an Jiaotong University, Xi'an, China
| | - L Cao
- State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an, China
| | - B D Peng
- State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an, China
| | - G Z Song
- State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an, China
| | - Z Q Yue
- State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an, China
| | - J M Ma
- State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an, China
| | - L Sheng
- State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an, China
| | - B K Li
- State Key Laboratory of Intense Pulsed Radiation Simulation and Effect, Northwest Institute of Nuclear Technology, Xi'an, China
| | - H X Wang
- Institute of Wide Bandgap Semiconductors and Devices, Xi'an Jiaotong University, Xi'an, China
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29
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Yang F, Yang Y, Wang Q, Wang Z, Miao Q, Xiao X, Wei Y, Bian Z, Sheng L, Chen X, Qiu D, Fang J, Tang R, Gershwin ME, Ma X. The risk predictive values of UK-PBC and GLOBE scoring system in Chinese patients with primary biliary cholangitis: the additional effect of anti-gp210. Aliment Pharmacol Ther 2017; 45:733-743. [PMID: 28083929 DOI: 10.1111/apt.13927] [Citation(s) in RCA: 53] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2016] [Revised: 10/04/2016] [Accepted: 12/12/2016] [Indexed: 12/12/2022]
Abstract
BACKGROUND Adequate risk stratification is critical for the management of the patients with primary biliary cholangitis (PBC). The UK-PBC and GLOBE scoring systems for prognosis of PBC have been proposed recently, but have not been validated in Asian population. AIM To validate the UK-PBC and GLOBE scoring systems in Chinese patients for prognosis of PBC. To clarify the role of anti-gp210 as a biomarker, and to investigate whether anti-gp210 could affect the prognostic values of UK-PBC and GLOBE scoring systems. METHODS We retrospectively analysed 276 patients with PBC evaluated between September 2004 and May 2016, including 133 anti-gp210+ and 143 anti-gp210- patients. RESULTS The 5-year adverse outcome-free survivals of anti-gp210+ vs. anti-gp210- patients were 70% and 85%, respectively (P = 0.005). Cirrhosis (P = 0.001), albumin level ≤40 g/L (P = 0.011) and platelet count ≤153 × 109 (P < 0.001) had a superimposition effect on anti-gp210 antibody as a risk factor. Furthermore, long-term prognoses were evaluated using the UK-PBC and GLOBE scores. For UK-PBC scoring system, the area under receiver operating characteristic curve (AUROC) was 0.924 for all patients with PBC (n = 223), 0.940 for anti-gp210+ patients (n = 110) and 0.888 for anti-gp210- patients (n = 113). For GLOBE scoring system, the area under receiver operating characteristic curve was 0.901 for all patients with PBC (n = 223), 0.924 for anti-gp210+ patients (n = 110) and 0.848 for anti-gp210- patients (n = 113). UK-PBC score >0.0578 (P < 0.001, HR: 32.736, 95% CI: 11.368-94.267) and GLOBE score <0.850 (P < 0.001, HR: 18.763, 95% CI: 7.968-44.180) were associated with poorer outcomes in the whole cohort. CONCLUSIONS The UK-PBC and GLOBE scoring systems were good 5-year prognostic predictors in Chinese patients with PBC, especially in anti-gp210+ patients. As a biomarker, anti-gp210 antibody was associated with a more severe cholestatic manifestation and a worse long-term prognosis. The anti-gp210 antibody could be added to further optimise the UK-PBC and GLOBE scoring systems.
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Affiliation(s)
- F Yang
- Division of Gastroenterology and Hepatology, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, State Key Laboratory for Oncogenes and Related Genes, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Institute of Digestive Disease, Shanghai, China
| | - Y Yang
- Division of Gastroenterology and Hepatology, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, State Key Laboratory for Oncogenes and Related Genes, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Institute of Digestive Disease, Shanghai, China
| | - Q Wang
- Division of Gastroenterology and Hepatology, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, State Key Laboratory for Oncogenes and Related Genes, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Institute of Digestive Disease, Shanghai, China
| | - Z Wang
- Division of Gastroenterology and Hepatology, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, State Key Laboratory for Oncogenes and Related Genes, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Institute of Digestive Disease, Shanghai, China
| | - Q Miao
- Division of Gastroenterology and Hepatology, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, State Key Laboratory for Oncogenes and Related Genes, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Institute of Digestive Disease, Shanghai, China
| | - X Xiao
- Division of Gastroenterology and Hepatology, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, State Key Laboratory for Oncogenes and Related Genes, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Institute of Digestive Disease, Shanghai, China
| | - Y Wei
- Division of Gastroenterology and Hepatology, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, State Key Laboratory for Oncogenes and Related Genes, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Institute of Digestive Disease, Shanghai, China
| | - Z Bian
- Department of Gastroenterology and Hepatology, Nantong Institute of Liver Disease, Nantong Third People's Hospital, Nantong University, Jiangsu, China
| | - L Sheng
- Division of Gastroenterology and Hepatology, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, State Key Laboratory for Oncogenes and Related Genes, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Institute of Digestive Disease, Shanghai, China
| | - X Chen
- Division of Gastroenterology and Hepatology, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, State Key Laboratory for Oncogenes and Related Genes, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Institute of Digestive Disease, Shanghai, China
| | - D Qiu
- Division of Gastroenterology and Hepatology, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, State Key Laboratory for Oncogenes and Related Genes, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Institute of Digestive Disease, Shanghai, China
| | - J Fang
- Division of Gastroenterology and Hepatology, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, State Key Laboratory for Oncogenes and Related Genes, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Institute of Digestive Disease, Shanghai, China
| | - R Tang
- Division of Gastroenterology and Hepatology, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, State Key Laboratory for Oncogenes and Related Genes, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Institute of Digestive Disease, Shanghai, China
| | - M E Gershwin
- Division of Rheumatology, Allergy, and Clinical Immunology, University of California at Davis, Davis, CA, USA
| | - X Ma
- Division of Gastroenterology and Hepatology, Key Laboratory of Gastroenterology and Hepatology, Ministry of Health, State Key Laboratory for Oncogenes and Related Genes, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Institute of Digestive Disease, Shanghai, China
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Abstract
We show that quantum spin Hall (QSH) effect does not occur in a square lattice model due to cancellation of the intrinsic spin-orbit coupling coming from different hopping paths. However, we show that QSH effect can be induced by the presence of staggered magnetic fluxes alternating directions square by square. When the resulting Peierls phase takes a special value , the system has a composite symmetry ΘΡ− with Θ the time-reversal operator and Ρ− transforming the Peierls phase from γ to γ − , which protects the gapless edge states. Once the phase deviates from , the edge states open a gap, as the composite symmetry is broken. We further investigate the effect of a Zeeman field on the QSH state, and find that the edge states remain gapless for . This indicates that the QSH effect is immune to the magnetic perturbation.
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Affiliation(s)
- Wei Luo
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China.,School of Science, Jiangxi University of Science and Technology, Ganzhou 341000, China
| | - D X Shao
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China
| | - Ming-Xun Deng
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China
| | - W Y Deng
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China
| | - L Sheng
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China.,Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
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31
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Sheng L, Turner AG, Tarulli GA, Barratt K, Kremer R, Morris HA, Callen DF, Anderson PH. Abstract P4-05-02: Conditional inactivation of the 25-hydroxyvitamin D-24-hydroxylase (Cyp24a1) in the mouse mammary epithelium alters mammary gland development. Cancer Res 2017. [DOI: 10.1158/1538-7445.sabcs16-p4-05-02] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
The biologically active form of vitamin D (1,25(OH)2D) regulates proliferation, differentiation, and apoptosis in diverse cell types. We have previously identified anti-proliferative activities of 1,25(OH)2D in human breast tissue, as well as 1,25(OH)2D target gene expression consistent with reports that elevated vitamin D levels may protect against cancer. In mouse studies, vitamin D signaling modulates normal mammary gland development, including ductal outgrowth and branching, and protects against tumorigenesis. Degradation of 1,25(OH)2D is initiated by the enzyme Cyp24a1 in target tissues, providing critical local control of 1,25(OH)2D bioactivity. In vitro, blockade of Cyp24a1 activity potentiates the anti-proliferative effects of 1,25(OH)2D. However, the extent to which endogenous Cyp24a1 activity within the mammary epithelium regulates local 1,25(OH)2D levels to modulate normal mammary gland development, with possible implications for cancer, has not been investigated. We generated a novel mouse model with conditional knockout of the Cyp24a1 gene specifically in the mammary epithelium (MMTV-Cre x Cyp24a1lox/lox). Ablation of Cyp24a1 activity in the mammary epithelium does not alter either gland or body weight at 4, 6 or 10 weeks of age. Preliminary analyses of mammary gland whole mounts indicate that virgin knockout mice form fewer terminal end buds compared to glands from wild-type littermates at 4 and 6 weeks of age (P<0.05). Moreover, the width of the ducts proximal to the central lymph node of knockout mice was less than that of wild-type mice at 4 and 10 weeks of age (P<0.05 and P<0.01, respectively). In addition, the number of secondary and tertiary branching points is reduced in mammary glands from knockout mice at 6 weeks of age (P<0.05 and P<0.01, respectively). In summary, our findings suggest that Cyp24a1 activity within epithelial cells plays a crucial role to modulate postnatal mammary gland development, presumably by limiting the local accumulation of 1,25(OH)2D.
Citation Format: Sheng L, Turner AG, Tarulli GA, Barratt K, Kremer R, Morris HA, Callen DF, Anderson PH. Conditional inactivation of the 25-hydroxyvitamin D-24-hydroxylase (Cyp24a1) in the mouse mammary epithelium alters mammary gland development [abstract]. In: Proceedings of the 2016 San Antonio Breast Cancer Symposium; 2016 Dec 6-10; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2017;77(4 Suppl):Abstract nr P4-05-02.
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Affiliation(s)
- L Sheng
- Adelaide Medical School, University of Adelaide, Adelaide, SA, Australia; Dame Roma Mitchell Cancer Research Laboratories (DRMCRL), Adelaide Medical School, University of Adelaide, Adelaide, SA, Australia; School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, SA, Australia; McGill University Health Centre, Montreal, QC, Canada
| | - AG Turner
- Adelaide Medical School, University of Adelaide, Adelaide, SA, Australia; Dame Roma Mitchell Cancer Research Laboratories (DRMCRL), Adelaide Medical School, University of Adelaide, Adelaide, SA, Australia; School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, SA, Australia; McGill University Health Centre, Montreal, QC, Canada
| | - GA Tarulli
- Adelaide Medical School, University of Adelaide, Adelaide, SA, Australia; Dame Roma Mitchell Cancer Research Laboratories (DRMCRL), Adelaide Medical School, University of Adelaide, Adelaide, SA, Australia; School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, SA, Australia; McGill University Health Centre, Montreal, QC, Canada
| | - K Barratt
- Adelaide Medical School, University of Adelaide, Adelaide, SA, Australia; Dame Roma Mitchell Cancer Research Laboratories (DRMCRL), Adelaide Medical School, University of Adelaide, Adelaide, SA, Australia; School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, SA, Australia; McGill University Health Centre, Montreal, QC, Canada
| | - R Kremer
- Adelaide Medical School, University of Adelaide, Adelaide, SA, Australia; Dame Roma Mitchell Cancer Research Laboratories (DRMCRL), Adelaide Medical School, University of Adelaide, Adelaide, SA, Australia; School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, SA, Australia; McGill University Health Centre, Montreal, QC, Canada
| | - HA Morris
- Adelaide Medical School, University of Adelaide, Adelaide, SA, Australia; Dame Roma Mitchell Cancer Research Laboratories (DRMCRL), Adelaide Medical School, University of Adelaide, Adelaide, SA, Australia; School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, SA, Australia; McGill University Health Centre, Montreal, QC, Canada
| | - DF Callen
- Adelaide Medical School, University of Adelaide, Adelaide, SA, Australia; Dame Roma Mitchell Cancer Research Laboratories (DRMCRL), Adelaide Medical School, University of Adelaide, Adelaide, SA, Australia; School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, SA, Australia; McGill University Health Centre, Montreal, QC, Canada
| | - PH Anderson
- Adelaide Medical School, University of Adelaide, Adelaide, SA, Australia; Dame Roma Mitchell Cancer Research Laboratories (DRMCRL), Adelaide Medical School, University of Adelaide, Adelaide, SA, Australia; School of Pharmacy and Medical Sciences, University of South Australia, Adelaide, SA, Australia; McGill University Health Centre, Montreal, QC, Canada
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Chen MN, Mei F, Su W, Wang HQ, Zhu SL, Sheng L, Xing DY. Topological phases of the kicked Harper-Kitaev model with ultracold atoms. J Phys Condens Matter 2017; 29:035601. [PMID: 27845928 DOI: 10.1088/0953-8984/29/3/035601] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
We propose using ultracold atoms trapped in a one-dimensional periodically driven optical lattice to realize the Harper-Kitaev model, where the on-site energies are periodically kicked. Such a system provides a natural platform to study both Chern insulators and Majorana fermions. Based on calculating the quasienergy spectra, we find that both Floquet Majorana modes and Hall chiral edge modes could appear at the sample boundary in the gaps between the quasienergy bands. We also study the competition of topological superconductor and Chern insulator states in the model. We calculate the [Formula: see text] index and Floquet Chern number to characterize the above two different topological states, including the topological phase transitions in the kicked Harper-Kitaev model with the increase in the strength of the kick.
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Affiliation(s)
- M N Chen
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
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Zhang X, Tang Y, Xie Y, Ding C, Xiao J, Jiang X, Shan H, Lin Y, Li C, Hu D, Li T, Sheng L. Total magnetic resonance imaging burden of cerebral small-vessel disease is associated with post-stroke depression in patients with acute lacunar stroke. Eur J Neurol 2016; 24:374-380. [PMID: 27933697 DOI: 10.1111/ene.13213] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Accepted: 10/25/2016] [Indexed: 11/28/2022]
Affiliation(s)
- X. Zhang
- Department of Neurology; Second Affiliated Hospital of Nanjing University of Chinese Medicine; Nanjing Jiangsu China
| | - Y. Tang
- Department of Neurology; Second Affiliated Hospital of Nanjing University of Chinese Medicine; Nanjing Jiangsu China
| | - Y. Xie
- Department of Neurology; Jinling Hospital; Nanjing University School of Medicine; Nanjing Jiangsu China
| | - C. Ding
- Department of Neurology; Second Affiliated Hospital of Nanjing University of Chinese Medicine; Nanjing Jiangsu China
| | - J. Xiao
- Department of Neurology; Second Affiliated Hospital of Nanjing University of Chinese Medicine; Nanjing Jiangsu China
| | - X. Jiang
- Department of Neurology; Second Affiliated Hospital of Nanjing University of Chinese Medicine; Nanjing Jiangsu China
| | - H. Shan
- Department of Radiology; Second Affiliated Hospital of Nanjing University of Chinese Medicine; Nanjing Jiangsu China
| | - Y. Lin
- Department of Radiology; Hainan General Hospital; Haikou Hainan China
| | - C. Li
- Department of Neurology; Second Affiliated Hospital of Nanjing University of Chinese Medicine; Nanjing Jiangsu China
| | - D. Hu
- Department of Neurology; Second Affiliated Hospital of Nanjing University of Chinese Medicine; Nanjing Jiangsu China
| | - T. Li
- Department of Neurology; Second Affiliated Hospital of Nanjing University of Chinese Medicine; Nanjing Jiangsu China
| | - L. Sheng
- Department of Neurology; Second Affiliated Hospital of Nanjing University of Chinese Medicine; Nanjing Jiangsu China
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34
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Baomin L, Sheng L, Weiping W, Xusheng H, Mei G. Characters of Images and Clinical Diagnosis and Treatment in Cerebral Venule with Thrombosis. ACTA ACUST UNITED AC 2016. [DOI: 10.1177/197140090301600687] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Affiliation(s)
- L. Baomin
- General Hospital of PLA, Beijing; China
| | - L. Sheng
- General Hospital of PLA, Beijing; China
| | | | | | - G. Mei
- General Hospital of PLA, Beijing; China
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35
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Chen W, Deng WY, Hou JM, Shi DN, Sheng L, Xing DY. π Spin Berry Phase in a Quantum-Spin-Hall-Insulator-Based Interferometer: Evidence for the Helical Spin Texture of the Edge States. Phys Rev Lett 2016; 117:076802. [PMID: 27563984 DOI: 10.1103/physrevlett.117.076802] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2016] [Indexed: 06/06/2023]
Abstract
The quantum spin Hall insulator is characterized by helical edge states, with the spin polarization of the electron being locked to its direction of motion. Although the edge-state conduction has been observed, unambiguous evidence of the helical spin texture is still lacking. Here, we investigate the coherent edge-state transport in an interference loop pinched by two point contacts. Because of the helical character, the forward interedge scattering enforces a π spin rotation. Two successive processes can only produce a nontrivial 2π or trivial 0 spin rotation, which can be controlled by the Rashba spin-orbit coupling. The nontrivial spin rotation results in a geometric π Berry phase, which can be detected by a π phase shift of the conductance oscillation relative to the trivial case. Our results provide smoking gun evidence for the helical spin texture of the edge states. Moreover, it also provides the opportunity to all electrically explore the trajectory-dependent spin Berry phase in condensed matter.
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Affiliation(s)
- Wei Chen
- College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
| | - Wei-Yin Deng
- National Laboratory of Solid State Microstructures, Department of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - Jing-Min Hou
- Department of Physics, Southeast University, Nanjing 211189, China
| | - D N Shi
- College of Science, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
| | - L Sheng
- National Laboratory of Solid State Microstructures, Department of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - D Y Xing
- National Laboratory of Solid State Microstructures, Department of Physics, and Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
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36
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Abstract
We propose to realize adiabatic topological spin and valley pumping by using silicene, subject to the modulation of an in-plane ac electric field with amplitude Ey and a vertical electric field consisting of an electrostatic component and an ac component with amplitudes and . By tuning and , topological valley pumping or spin-valley pumping can be achieved. The low-noise valley and spin currents generated can be useful in valleytronic and spintronic applications. Our work also demonstrates that bulk topological spin or valley pumping is a general characteristic effect of two-dimensional topological insulators, irrelevant to the edge state physics.
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Affiliation(s)
- Wei Luo
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China
| | - L Sheng
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China.,Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - B G Wang
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China.,Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
| | - D Y Xing
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China.,Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
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37
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Sheng L, Olsen S, Hu J, Yue W, Means W, Zhu M. Inhibitory effects of grape seed extract on growth, quorum sensing, and virulence factors of CDC “top-six” non-O157 Shiga toxin producing E. coli. Int J Food Microbiol 2016; 229:24-32. [DOI: 10.1016/j.ijfoodmicro.2016.04.001] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 03/15/2016] [Accepted: 04/01/2016] [Indexed: 10/22/2022]
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38
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Zhong J, Shi H, Ma H, Sheng L. Comment on 'Validating new diagnostic imaging criteria for primary progressive aphasia via anatomical likelihood estimation meta-analyses'. Eur J Neurol 2016; 23:e38. [PMID: 27272109 DOI: 10.1111/ene.13022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2016] [Accepted: 03/22/2016] [Indexed: 11/29/2022]
Affiliation(s)
- J Zhong
- Department of Neurology, Affiliated Yancheng Hospital, School of Medicine, Southeast University, Yancheng, China
| | - H Shi
- Department of Neurology, Affiliated Yancheng Hospital, School of Medicine, Southeast University, Yancheng, China
| | - H Ma
- Department of Neurology, Kunshan Hospital of Traditional Chinese Medicine, Kunshan, China
| | - L Sheng
- Department of Neurology, Kunshan Hospital of Traditional Chinese Medicine, Kunshan, China
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39
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Deng WY, Geng H, Luo W, Sheng L, Xing DY. Zeeman-Field-Tuned Topological Phase Transitions in a Two-Dimensional Class-DIII Superconductor. Sci Rep 2016; 6:25503. [PMID: 27148675 PMCID: PMC4857734 DOI: 10.1038/srep25503] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2016] [Accepted: 04/19/2016] [Indexed: 11/09/2022] Open
Abstract
We investigate the topological phase transitions in a two-dimensional time-reversal invariant topological superconductor in the presence of a Zeeman field. Based on the spin Chern number theory, we find that the system exhibits a number of topologically distinct phases with changing the out-of-plane component of the Zeeman field, including a quantum spin Hall-like phase, quantum anomalous Hall-like phases with total Chern number C = −2, −1, 1 and 2, and a topologically trivial superconductor phase. The BdG band gap closes at each boundary of the phase transitions. Furthermore, we demonstrate that the zero bias conductance provides clear transport signatures of the different topological phases, which are robust against symmetry-breaking perturbations.
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Affiliation(s)
- W Y Deng
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China
| | - H Geng
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China
| | - W Luo
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China
| | - L Sheng
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China.,Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
| | - D Y Xing
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China.,Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing 210093, China
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40
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Xue HJ, Shi J, Liu B, Wang DY, Dong ZX, Guo H, Kong YH, Sheng L, Shao Q, Sun DH, Zhang L, Pan YJ, Dong XW, Li JQ, Xue JY, Zhou YY, Yang HP, Li Y. Comparison of half- and standard-dose ticagrelor in Chinese patients with NSTE-ACS. Platelets 2016; 27:440-5. [PMID: 26830862 DOI: 10.3109/09537104.2015.1135890] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- H. J. Xue
- Cardiovascular Department, The First Clinical Hospital, Harbin Medical University, Harbin, P. R. China
| | - J. Shi
- Cardiovascular Department, The First Clinical Hospital, Harbin Medical University, Harbin, P. R. China
| | - B. Liu
- Cardiovascular Department, The First Clinical Hospital, Harbin Medical University, Harbin, P. R. China
| | - D. Y. Wang
- Cardiovascular Department, The First Clinical Hospital, Harbin Medical University, Harbin, P. R. China
| | - Z. X. Dong
- Cardiovascular Department, The First Clinical Hospital, Harbin Medical University, Harbin, P. R. China
| | - H. Guo
- Cardiovascular Department, The First Clinical Hospital, Harbin Medical University, Harbin, P. R. China
| | - Y. H. Kong
- Cardiovascular Department, The First Clinical Hospital, Harbin Medical University, Harbin, P. R. China
| | - L. Sheng
- Cardiovascular Department, The First Clinical Hospital, Harbin Medical University, Harbin, P. R. China
| | - Q. Shao
- Cardiovascular Department, The First Clinical Hospital, Harbin Medical University, Harbin, P. R. China
| | - D. H. Sun
- Cardiovascular Department, The First Clinical Hospital, Harbin Medical University, Harbin, P. R. China
| | - L. Zhang
- Cardiovascular Department, The First Clinical Hospital, Harbin Medical University, Harbin, P. R. China
| | - Y. J. Pan
- Cardiovascular Department, The First Clinical Hospital, Harbin Medical University, Harbin, P. R. China
| | - X. W. Dong
- Cardiovascular Department, The First Clinical Hospital, Harbin Medical University, Harbin, P. R. China
| | - J. Q. Li
- Cardiovascular Department, The First Clinical Hospital, Harbin Medical University, Harbin, P. R. China
| | - J. Y. Xue
- Cardiovascular Department, The First Clinical Hospital, Harbin Medical University, Harbin, P. R. China
| | - Y. Y. Zhou
- Cardiovascular Department, The First Clinical Hospital, Harbin Medical University, Harbin, P. R. China
| | - H. P. Yang
- Cardiovascular Department, The First Clinical Hospital, Harbin Medical University, Harbin, P. R. China
| | - Y. Li
- Cardiovascular Department, The First Clinical Hospital, Harbin Medical University, Harbin, P. R. China
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41
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Sheng L, Yang P, He Z, Wang G, Luo J, Liu J. Characterization of Normal and Freeze-Thawed Tissues in vitro Through The Ultrasonic Integrated Backscatter. Cryo Letters 2016; 37:303-307. [PMID: 27924997] [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: 06/06/2023]
Abstract
BACKGROUND The ultrasound guidance of cryotherapy could be improved if changes of tissue characterization parameters during freezing could be used to monitor freezing patterns and estimate the postoperative effects after surgery. OBJECTIVE The ultrasonic integrated backscatter analysis holds promise as an effective method for signal analysis and characterization of thawed tissues. MATERIALS AND METHODS The ultrasonic integrated backscatter has been found to be an important parameter for describing the ultrasonic scattering and characterization of biological tissues. However, its potential values in the evaluation of cryosurgical effects of tissues reserved unclear so far. Here, we investigated the power spectrum of acoustic signal to estimate the ultrasound integrated backscatter in normal and freeze-thawed tissues on porcine livers in vitro. RESULTS The experimental results carried out at 10 MHz using weakly focused pulse-echo signal element transducer indicated that the ultrasonic integrated backscatter in normal liver tissues is 31.3±4.6 whereas it is 44.2±6.5 in several pre-frozen and then thawed tissues. CONCLUSION These results disclosed the good correlation between the ultrasonic integrated backscatter and microstructures of the normal or thawed tissues, and hence demonstrated that the power spectrum holds promise to be used as an effective method for the characterization of thawed tissues ultrasonic integrated backscatter, which might offer a potential pragmatic prospect for the practice of monitoring transition zone between frozen and unfrozen tissues during the surgical therapy, and evaluating postoperative effects.
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Affiliation(s)
- L Sheng
- Department of Biomedical Engineering, Tsinghua University, Beijing, China
| | - P Yang
- Center for Medical Device Evaluation, China Food and Drug Administration, Beijing, China
| | - Z He
- Technical Institute of Physics and Chemistry, Chinese Academy of Science, Beijing, China
| | - G Wang
- Department of Bioengineering, Imperial College London, London, United Kingdom
| | - J Luo
- Department of Biomedical Engineering, Tsinghua University, Beijing, China
| | - J Liu
- Department of Biomedical Engineering, Tsinghua University, Beijing, China.
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42
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Zhang HJ, Sun ZQ, Qian WQ, Sheng L. Abnormal gene expression profile reveals the common key signatures associated with clear cell renal cell carcinoma: a meta-analysis. Genet Mol Res 2015; 14:2216-24. [PMID: 25867368 DOI: 10.4238/2015.march.27.7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The aims of this study were to identify the common gene signatures of clear cell renal cell carcinoma (CCRCC), and to expand the respective protein-protein interaction networks associated with CCRCC regulation. For the latter, we utilized multiple gene expression data sets from the National Center for Biotechnology Information (NCBI) Gene Expression Omnibus (GEO), with which we could analyze the aberrant gene expression patterns at the transcriptome level that distinguish cancer from normal samples. We obtained the GSE781 and GSE6344 clear cell renal cell carcinoma gene expression datasets from GEO, which contained a total of 37 cancer and 37 normal samples. Subsequent R language analysis allowed identification of the differentially expressed genes. The genes that exhibited significant up or downregulation in cancers were entered into the Database for Annotation, Visualization, and Integrated Discovery to perform analysis of gene functional annotations, resulting in the generation of two protein-protein interaction networks that included the most significantly up or downregulated genes in CCRCC. These allowed us to identify the key factor genes, which could potentially be utilized to separate cancer versus normal samples. The differentially regulated genes are also highly likely to be functionally important regulatory factors in renal cell carcinoma: cell functions showing enrichment of these genes include amine biosynthetic and vitamin metabolic processes, ion binding, extracellular transport function, and regulation of biosynthesis. Together, the results from our study offer further reason to pursue diagnosis and therapy of CCRCC at the molecular level.
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Affiliation(s)
- H J Zhang
- Department of Urology, Huadong Hospital, Fudan University, Shanghai, China
| | - Z Q Sun
- Department of Urology, Huadong Hospital, Fudan University, Shanghai, China
| | - W Q Qian
- Department of Urology, Huadong Hospital, Fudan University, Shanghai, China
| | - L Sheng
- Department of Urology, Huadong Hospital, Fudan University, Shanghai, China
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Abstract
OBJECTIVE To reveal the overall situation of research on Ebola virus via visual knowledge mapping analyses of the literatures regarding Ebola virus all around the world, e.g., literature metrology and topic evolvement. METHODS On the basis of the database Web of Knowledge (SCI), a knowledge graph was built by comprehensively utilizing software such as BIBEXCEL, GEPHI, VOSVIEWER, and HistCite. RESULTS According to the results of literature analysis, publications on Ebola virus boomed in 2014, and the research focus transferred gradually from basic research (viral glycoprotein) in 1999 to the prevention and treatment research (vaccine). The United States are in a dominant position in the field of Ebola virus research, wherein the US army (United States Army Medical Research Institute of Infectious Diseases) has the strongest research capacity. DISCUSSION Ebola virus is an important potential biological warfare agent, and some researches may not be published in the form of literature. So the result of literature metrology can only partially reflect the situation of Ebola virus research. In addition, close attention should be paid to the biosafety risk of Ebola research (Tab. 5, Fig. 5, Ref. 14).
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44
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Sheng L. Study on H
<sub>3</sub>
<sup>+</sup> formation by synchrotron radiation. JAMS 2014. [DOI: 10.4208/jams.042813.070213a] [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: 11/23/2022]
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45
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Zhang YF, Sheng L, Shen R, Wang R, Xing DY. Entanglement, subsystem particle numbers and topology in free fermion systems. J Phys Condens Matter 2014; 26:105502. [PMID: 24553300 DOI: 10.1088/0953-8984/26/10/105502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We study the relationship between bipartite entanglement, subsystem particle number and topology in a half-filled free fermion system. It is proposed that the spin-projected particle numbers can distinguish the quantum spin Hall state from other states, and can be used to establish a new topological index for the system. Furthermore, we apply the new topological invariant to a disordered system and show that a topological phase transition occurs when the disorder strength is increased beyond a critical value. It is also shown that the subsystem particle number fluctuation displays behavior very similar to that of the entanglement entropy. This provides a lower-bound estimation for the entanglement entropy, which can be utilized to obtain an estimate of the entanglement entropy experimentally.
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Affiliation(s)
- Y F Zhang
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
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46
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Liu J, Wu YY, Huang XM, Yang M, Zha BB, Wang F, Zha Y, Sheng L, Chen ZPG, Gu Y. Ageing and type 2 diabetes in an elderly Chinese population: the role of insulin resistance and beta cell dysfunction. Eur Rev Med Pharmacol Sci 2014; 18:1790-1797. [PMID: 24992623] [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: 06/03/2023]
Abstract
OBJECTIVE The aim of this longitudinal study was to examine the effects of ageing on glucose regulation in elderly Chinese men and women. SUBJECTS AND METHODS A total of 4,566 older Chinese men and women (mean age: 70.4 ± 6.7 years) were enrolled in the study. Oral glucose tolerance tests were performed in all participants at baseline and in 3,174 individuals (69.5%) after 3 years of follow-up. Insulin resistance and beta cell function were estimated by the homeostasis model assessment for insulin resistance (HOMA-IR) and beta function (HOMA%-b), respectively. RESULTS At baseline, 1,143 had type 2 diabetes (T2D), 517 had prediabetes and 2,906 had normal glucose tolerance (NGT). After 3 years of follow-up, 769 (42.2%) of 1,821 individuals with NGT at baseline progressed to prediabetes and 153 (8.4%) progressed to T2D. Of individuals with prediabetes at baseline, 17.3% progressed to T2D. In individuals who maintained NGT during follow-up ageing was associated with increased insulin resistance (p ≤ 0.001) and a compensatory increase in beta function (p ≤ 0.001). Individuals with NGT or prediabetes who progressed to T2D during follow-up had a significantly increased insulin resistance and a decreased beta cell function (p < 0.01). In contrast, individuals who regressed from prediabetes to NGT increased both insulin resistance and beta cell function (p < 0.01). CONCLUSIONS Ageing is associated with development of insulin resistance in an Elderly Chinese population. Therefore, maintenance of normal glucose regulation depends on the ability to compensatory increase of the beta cell function.
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Affiliation(s)
- J Liu
- Department of Endocrinology, Shanghai Fifth People's Hospital, Fudan University, Shanghai, China.
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47
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Li H, Sheng L, Shen R, Shao LB, Wang B, Sheng DN, Xing DY. Stabilization of the quantum spin Hall effect by designed removal of time-reversal symmetry of edge states. Phys Rev Lett 2013; 110:266802. [PMID: 23848907 DOI: 10.1103/physrevlett.110.266802] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2013] [Indexed: 06/02/2023]
Abstract
The quantum spin Hall (QSH) effect is known to be unstable to perturbations violating time-reversal symmetry. We show that creating a narrow ferromagnetic region near the edge of a QSH sample can push one of the counterpropagating edge states to the inner boundary of the ferromagnetic region and leave the other at the outer boundary, without changing their spin polarizations and propagation directions. Since the two edge states are spatially separated into different "lanes," the QSH effect becomes robust against symmetry-breaking perturbations.
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Affiliation(s)
- Huichao Li
- Department of Physics and National Laboratory of Solid State Microstructures, Nanjing University, Nanjing 210093, China
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48
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Xu Z, Sheng L, Shen R, Wang B, Xing DY. Kosterlitz-Thouless transition in disordered two-dimensional topological insulators. J Phys Condens Matter 2013; 25:065501. [PMID: 23307691 DOI: 10.1088/0953-8984/25/6/065501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The disorder-driven metal-insulator transition in the quantum spin Hall systems is studied by scaling analysis of the Thouless conductance g. Below a critical disorder strength, the conductance is independent of the sample size M, an indication of critically delocalized electron states. The calculated beta function β = d ln g/d ln M indicates that the metal-insulator transition is of Kosterlitz-Thouless (KT) type, which is characterized by binding and unbinding of vortex-antivortex pairs of the local currents. The KT-like metal-insulator transition is a basic characteristic of the quantum spin Hall state, being independent of the time-reversal symmetry.
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Affiliation(s)
- Zhong Xu
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, People's Republic of China
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Chen W, Shen R, Sheng L, Wang BG, Xing DY. Electron entanglement detected by quantum spin Hall systems. Phys Rev Lett 2012; 109:036802. [PMID: 22861883 DOI: 10.1103/physrevlett.109.036802] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2011] [Revised: 02/22/2012] [Indexed: 06/01/2023]
Abstract
We propose a promising electron entanglement detector consisting of two quantum spin Hall systems weakly coupled to a superconductor. The detection of electron spins along various polarization directions, which is a prerequisite for testing Bell's inequality on solid state spins, can be achieved in an all-electrical-controlled manner utilizing the helical edge states. It is found that the violation of Bell's inequality exists in a large range of the tunneling parameters, which can be realized in mercury telluride quantum wells.
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Affiliation(s)
- Wei Chen
- National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing 210093, China
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Li Y, Shi J, Yang BF, Liu L, Han CL, Li WM, Dong DL, Pan ZW, Liu GZ, Geng JQ, Sheng L, Tan XY, Sun DH, Gong ZH, Gong YT. Ketamine-induced ventricular structural, sympathetic and electrophysiological remodelling: pathological consequences and protective effects of metoprolol. Br J Pharmacol 2012; 165:1748-1756. [PMID: 21883145 DOI: 10.1111/j.1476-5381.2011.01635.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND AND PURPOSE Growing evidence suggests that long-term abuse of ketamine does harm the heart and increases the risk of sudden death. The present study was performed to explore the cardiotoxicity of ketamine and the protective effects of metoprolol. EXPERIMENTAL APPROACH Rats and rabbits were divided into control, ketamine, metoprolol alone and ketamine plus metoprolol groups. Ketamine (40 mg·kg(-1) ·day(-1), i.p.) and metoprolol (20 mg·kg(-1) ·day(-1), p.o.) were administered continuously for 12 weeks in rats and 8 weeks in rabbits. Cardiac function, electrophysiological disturbances, cardiac collagen, cardiomyocte apoptosis and the remodelling-related proteins were evaluated. KEY RESULTS Rabbits treated with ketamine showed decreased left ventricular ejection fraction, slowed ventricular conduction velocity and increased susceptibility to ventricular arrhythmia. Metoprolol prevented these pathophysiological alterations. In ketamine-treated rats, cardiac collagen volume fraction and apoptotic cell number were higher than those of control animals; these effects were prevented by co-administration of metoprolol. Consistently, the expressions of poly (ADP-ribose) polymerases-1, apoptosis-inducing factor and NF-κB-light-chain-enhancer of activated B cells were all increased after ketamine treatment and sharply reduced after metoprolol administration. Moreover, ketamine enhanced sympathetic sprouting, manifested as increased growth-associated protein 43 and tyrosine TH expression. These effects of ketamine were prevented by metoprolol. CONCLUSIONS AND IMPLICATIONS Chronic treatment with ketamine caused significant ventricular myocardial apoptosis, fibrosis and sympathetic sprouting, which altered the electrophysiological properties of the heart and increased its susceptibility to malignant arrhythmia that may lead to sudden cardiac death. Metoprolol prevented the cardiotoxicity of ketamine, indicating a promising new therapeutic strategy.
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Affiliation(s)
- Y Li
- Cardiovascular Department, the First Clinical HospitalDepartment of Pharmacology and Bio-pharmaceutical Key Laboratory of Heilongjiang Province and State, Harbin Medical University, Harbin, China
| | - J Shi
- Cardiovascular Department, the First Clinical HospitalDepartment of Pharmacology and Bio-pharmaceutical Key Laboratory of Heilongjiang Province and State, Harbin Medical University, Harbin, China
| | - B F Yang
- Cardiovascular Department, the First Clinical HospitalDepartment of Pharmacology and Bio-pharmaceutical Key Laboratory of Heilongjiang Province and State, Harbin Medical University, Harbin, China
| | - L Liu
- Cardiovascular Department, the First Clinical HospitalDepartment of Pharmacology and Bio-pharmaceutical Key Laboratory of Heilongjiang Province and State, Harbin Medical University, Harbin, China
| | - C L Han
- Cardiovascular Department, the First Clinical HospitalDepartment of Pharmacology and Bio-pharmaceutical Key Laboratory of Heilongjiang Province and State, Harbin Medical University, Harbin, China
| | - W M Li
- Cardiovascular Department, the First Clinical HospitalDepartment of Pharmacology and Bio-pharmaceutical Key Laboratory of Heilongjiang Province and State, Harbin Medical University, Harbin, China
| | - D L Dong
- Cardiovascular Department, the First Clinical HospitalDepartment of Pharmacology and Bio-pharmaceutical Key Laboratory of Heilongjiang Province and State, Harbin Medical University, Harbin, China
| | - Z W Pan
- Cardiovascular Department, the First Clinical HospitalDepartment of Pharmacology and Bio-pharmaceutical Key Laboratory of Heilongjiang Province and State, Harbin Medical University, Harbin, China
| | - G Z Liu
- Cardiovascular Department, the First Clinical HospitalDepartment of Pharmacology and Bio-pharmaceutical Key Laboratory of Heilongjiang Province and State, Harbin Medical University, Harbin, China
| | - J Q Geng
- Cardiovascular Department, the First Clinical HospitalDepartment of Pharmacology and Bio-pharmaceutical Key Laboratory of Heilongjiang Province and State, Harbin Medical University, Harbin, China
| | - L Sheng
- Cardiovascular Department, the First Clinical HospitalDepartment of Pharmacology and Bio-pharmaceutical Key Laboratory of Heilongjiang Province and State, Harbin Medical University, Harbin, China
| | - X Y Tan
- Cardiovascular Department, the First Clinical HospitalDepartment of Pharmacology and Bio-pharmaceutical Key Laboratory of Heilongjiang Province and State, Harbin Medical University, Harbin, China
| | - D H Sun
- Cardiovascular Department, the First Clinical HospitalDepartment of Pharmacology and Bio-pharmaceutical Key Laboratory of Heilongjiang Province and State, Harbin Medical University, Harbin, China
| | - Z H Gong
- Cardiovascular Department, the First Clinical HospitalDepartment of Pharmacology and Bio-pharmaceutical Key Laboratory of Heilongjiang Province and State, Harbin Medical University, Harbin, China
| | - Y T Gong
- Cardiovascular Department, the First Clinical HospitalDepartment of Pharmacology and Bio-pharmaceutical Key Laboratory of Heilongjiang Province and State, Harbin Medical University, Harbin, China
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