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Cui Q, Xu YS, Gu JS, Yang S, Hua XH, Hua DH. [Geographic environment-related research advances on children's myopia: intraocular and environmental exposure factors and analytical methods]. Zhonghua Yan Ke Za Zhi 2024; 60:378-383. [PMID: 38583062 DOI: 10.3760/cma.j.cn112142-20230802-00020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 04/08/2024]
Abstract
Myopia has become a global phenomenon, transitioning into a significant public health issue of worldwide reach. The escalating prevalence of myopia may lead to an increase in the incidence of related complications, potentially resulting in irreversible vision damage for individuals. This not only causes considerable economic strain on societies but also poses a serious threat to vital sectors like national defense. This review outlines various external and internal exposure factors related to childhood myopia. It places particular focus on the analysis of the interaction between geographical environmental factors and internal exposure factors, and examines the limitations of applying traditional methods in studying the relationship between childhood myopia and geographical environmental factors. The paper also introduces two spatial regression methodologies based on frequency estimation and Bayesian estimation, summarizing their feasibility and merits when applied in the study of external exposure elements related to childhood myopia. Finally, it provides a fresh perspective on regional childhood myopia prevention strategies that are conscious of geographical environmental factors.
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Affiliation(s)
- Q Cui
- School of Geodesy, Wuhan University, Wuhan 430079, China
| | - Y S Xu
- Eye Center, Renmin Hospital, Wuhan University, Wuhan 430000,China
| | - J S Gu
- Eye Center, Renmin Hospital, Wuhan University, Wuhan 430000,China
| | - S Yang
- School of Geodesy, Wuhan University, Wuhan 430079, China
| | - X H Hua
- School of Geodesy, Wuhan University, Wuhan 430079, China
| | - D H Hua
- Eye Center, Renmin Hospital, Wuhan University, Wuhan 430000,China
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2
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Fang K, Xu Z, Yang L, Cui Q, Du B, Liu H, Wang R, Li P, Su J, Wang J. Biosynthesis of 10-Hydroxy-2-decenoic Acid through a One-Step Whole-Cell Catalysis. J Agric Food Chem 2024; 72:1190-1202. [PMID: 38175798 DOI: 10.1021/acs.jafc.3c08142] [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] [Subscribe] [Scholar Register] [Indexed: 01/06/2024]
Abstract
10-Hydroxy-2-decenoic acid (10-HDA) is an important component of royal jelly, known for its antimicrobial, anti-inflammatory, blood pressure-lowering, and antiradiation effects. Currently, 10-HDA biosynthesis is limited by the substrate selectivity of acyl-coenzyme A dehydrogenase, which restricts the technique to a two-step process. This study aimed to develop an efficient and simplified method for synthesizing 10-HDA. In this study, ACOX from Candida tropicalis 1798, which catalyzes 10-hydroxydecanoyl coenzyme A desaturation for 10-HDA synthesis, was isolated and heterologously coexpressed with FadE, Macs, YdiI, and CYP in Escherichia coli/SK after knocking out FadB, FadJ, and FadR genes. The engineered E. coli/AKS strain achieved a 49.8% conversion of decanoic acid to 10-HDA. CYP expression was improved through ultraviolet mutagenesis and high-throughput screening, increased substrate conversion to 75.6%, and the synthesis of 10-HDA was increased to 0.628 g/L in 10 h. This is the highest conversion rate and product concentration achieved in the shortest time to date. This study provides a simple and efficient method for 10-HDA biosynthesis and offers an effective method for developing strains with high product yields.
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Affiliation(s)
- Ke Fang
- State Key Laboratory of Biobased Material and Green Papermaking (LBMP) (Qilu University of Technology), Jinan 250353, Shandong, Republic of China
- School of Bioengineering, Qilu University of Technology, Jinan 250353, Shandong, Republic of China
| | - Ziting Xu
- State Key Laboratory of Biobased Material and Green Papermaking (LBMP) (Qilu University of Technology), Jinan 250353, Shandong, Republic of China
- School of Bioengineering, Qilu University of Technology, Jinan 250353, Shandong, Republic of China
| | - Lu Yang
- State Key Laboratory of Biobased Material and Green Papermaking (LBMP) (Qilu University of Technology), Jinan 250353, Shandong, Republic of China
- School of Bioengineering, Qilu University of Technology, Jinan 250353, Shandong, Republic of China
| | - Quan Cui
- State Key Laboratory of Biobased Material and Green Papermaking (LBMP) (Qilu University of Technology), Jinan 250353, Shandong, Republic of China
- School of Bioengineering, Qilu University of Technology, Jinan 250353, Shandong, Republic of China
| | - Bowen Du
- State Key Laboratory of Biobased Material and Green Papermaking (LBMP) (Qilu University of Technology), Jinan 250353, Shandong, Republic of China
- School of Bioengineering, Qilu University of Technology, Jinan 250353, Shandong, Republic of China
| | - Huijing Liu
- State Key Laboratory of Biobased Material and Green Papermaking (LBMP) (Qilu University of Technology), Jinan 250353, Shandong, Republic of China
- School of Bioengineering, Qilu University of Technology, Jinan 250353, Shandong, Republic of China
| | - Ruiming Wang
- State Key Laboratory of Biobased Material and Green Papermaking (LBMP) (Qilu University of Technology), Jinan 250353, Shandong, Republic of China
- School of Bioengineering, Qilu University of Technology, Jinan 250353, Shandong, Republic of China
| | - Piwu Li
- State Key Laboratory of Biobased Material and Green Papermaking (LBMP) (Qilu University of Technology), Jinan 250353, Shandong, Republic of China
- School of Bioengineering, Qilu University of Technology, Jinan 250353, Shandong, Republic of China
| | - Jing Su
- State Key Laboratory of Biobased Material and Green Papermaking (LBMP) (Qilu University of Technology), Jinan 250353, Shandong, Republic of China
- School of Bioengineering, Qilu University of Technology, Jinan 250353, Shandong, Republic of China
| | - Junqing Wang
- State Key Laboratory of Biobased Material and Green Papermaking (LBMP) (Qilu University of Technology), Jinan 250353, Shandong, Republic of China
- School of Bioengineering, Qilu University of Technology, Jinan 250353, Shandong, Republic of China
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3
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Kubař T, Elstner M, Cui Q. Hybrid Quantum Mechanical/Molecular Mechanical Methods For Studying Energy Transduction in Biomolecular Machines. Annu Rev Biophys 2023; 52:525-551. [PMID: 36791746 PMCID: PMC10810093 DOI: 10.1146/annurev-biophys-111622-091140] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023]
Abstract
Hybrid quantum mechanical/molecular mechanical (QM/MM) methods have become indispensable tools for the study of biomolecules. In this article, we briefly review the basic methodological details of QM/MM approaches and discuss their applications to various energy transduction problems in biomolecular machines, such as long-range proton transports, fast electron transfers, and mechanochemical coupling. We highlight the particular importance for these applications of balancing computational efficiency and accuracy. Using several recent examples, we illustrate the value and limitations of QM/MM methodologies for both ground and excited states, as well as strategies for calibrating them in specific applications. We conclude with brief comments on several areas that can benefit from further efforts to make QM/MM analyses more quantitative and applicable to increasingly complex biological problems.
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Affiliation(s)
- T Kubař
- Institute of Physical Chemistry, Karlsruhe Institute of Technology, Karlsruhe, Germany;
| | - M Elstner
- Institute of Physical Chemistry, Karlsruhe Institute of Technology, Karlsruhe, Germany;
- Institute of Biological Interfaces (IBG-2), Karlsruhe Institute of Technology, Karlsruhe, Germany;
| | - Q Cui
- Department of Chemistry, Boston University, Boston, Massachusetts, USA;
- Department of Physics, Boston University, Boston, Massachusetts, USA
- Department of Biomedical Engineering, Boston University, Boston, Massachusetts, USA
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4
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Cui Q, Li ZK, Li B, Wang C, Su CH. [A case of delayed peripheral neuropathy caused by diquat poisoning]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2023; 41:309-312. [PMID: 37248189 DOI: 10.3760/cma.j.cn121094-20220314-00130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Diquat is a kind of conductive contact-killing herbicides. The damage of central nervous system is relatively common, but the peripheral neuropathy caused by diquat has not been reported yet. In September 2021, we treated a patient with diquat poisoning. During the hospitalization, the patient was diagnosed with peripheral neuropathy. Therapy for peripheral nerve injury was given on the basis of conventional treatment of poisoning. The patient was discharged after his condition was stable. The follow-up showed that the peripheral neuropathy of patient was better than before. According to the condition of this patient, it is suggested that we should not only protect the function of gastrointestinal tract, liver, kidney, and central nervous system early, but should also pay attention to the damage of peripheral nervous system in clinical work. We should intervene earlier to improve the prognosis of patients.
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Affiliation(s)
- Q Cui
- School of Clinical Medicine, Weifang Medical University, Weifang 261053, China
| | - Z K Li
- Emergency Department, Qilu Hospital of Shandong University Dezhou Hospital, Dezhou 253000, China
| | - B Li
- Emergency Department, Qilu Hospital of Shandong University Dezhou Hospital, Dezhou 253000, China
| | - C Wang
- Emergency Department, Qilu Hospital of Shandong University Dezhou Hospital, Dezhou 253000, China
| | - C H Su
- Emergency Department, Qilu Hospital of Shandong University Dezhou Hospital, Dezhou 253000, China
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Chen ZM, Cui Q, Zhao B, Song R, Zhang X, Yoshie O. SST: Spatial and Semantic Transformers for Multi-Label Image Recognition. IEEE Trans Image Process 2022; 31:2570-2583. [PMID: 35275814 DOI: 10.1109/tip.2022.3148867] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Abstract
Multi-label image recognition has attracted considerable research attention and achieved great success in recent years. Capturing label correlations is an effective manner to advance the performance of multi-label image recognition. Two types of label correlations were principally studied, i.e., the spatial and semantic correlations. However, in the literature, previous methods considered only either of them. In this work, inspired by the great success of Transformer, we propose a plug-and-play module, named the Spatial and Semantic Transformers (SST), to simultaneously capture spatial and semantic correlations in multi-label images. Our proposal is mainly comprised of two independent transformers, aiming to capture the spatial and semantic correlations respectively. Specifically, our Spatial Transformer is designed to model the correlations between features from different spatial positions, while the Semantic Transformer is leveraged to capture the co-existence of labels without manually defined rules. Other than methodological contributions, we also prove that spatial and semantic correlations complement each other and deserve to be leveraged simultaneously in multi-label image recognition. Benefitting from the Transformer's ability to capture long-range correlations, our method remarkably outperforms state-of-the-art methods on four popular multi-label benchmark datasets. In addition, extensive ablation studies and visualizations are provided to validate the essential components of our method.
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6
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Liu Y, Yu J, Liu J, Wu B, Cui Q, Shen W, Xia S. Prognostic value of late gadolinium enhancement in arrhythmogenic right ventricular cardiomyopathy: a meta-analysis. Clin Radiol 2021; 76:628.e9-628.e15. [PMID: 34024635 DOI: 10.1016/j.crad.2021.04.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Accepted: 04/14/2021] [Indexed: 01/11/2023]
Abstract
AIM To assess systematically the prognostic value of cardiac magnetic resonance imaging (CMRI) in patients with arrhythmogenic right ventricular cardiomyopathy (ARVC). MATERIALS AND METHODS The full text of studies of the clinical efficacy of late gadolinium enhancement (LGE) in ARVC was retrieved in multiple databases. Stata 14 was adopted for meta-analysis and bias analysis. Heterogeneity was assessed with the I2 statistic. RESULTS After exclusions, 561 patients were included in five studies, and the eligibility criteria were met. The meta-analysis suggested that there was a significant difference between LGE positive and negative patients with ARVC in all-cause mortality (relative risk [RR] = 4.78, 95% confidence interval [CI] = 1.41, 16.23, p=0.012; p for heterogeneity = 0.692, I2 = 0%); major adverse cardiovascular events (MACE) (RR=2.48, 95% CI = 1.24, 4.96, p=0.010; p for heterogeneity = 0.596, I2 = 0%); ventricular tachycardia (RR=3.13, 95% CI = 1.69, 5.78, p<0.001; p for heterogeneity = 0.825, I2 = 0%); implanted cardiac defibrillators (RR=3.15, 95% CI = 1.69, 5.87], p<0.001; p for heterogeneity = 0.353, I2 = 9.4%). CONCLUSION LGE in ARVC patients is a predictor of all-cause mortality and MACE.
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Affiliation(s)
- Y Liu
- Department of Radiology, Tianjin First Central Hospital, No. 24, Fukang Road, Nankai District, Tianjin, 300000, China
| | - J Yu
- Department of Radiology, Tianjin First Central Hospital, No. 24, Fukang Road, Nankai District, Tianjin, 300000, China
| | - J Liu
- Outpatient Department, Tianjin Third Central Hospital, No. 83, Jintang Road, Hedong District, Tianjin, 300000, China
| | - B Wu
- Department of Radiology, Tianjin First Central Hospital, No. 24, Fukang Road, Nankai District, Tianjin, 300000, China
| | - Q Cui
- Department of Radiology, Tianjin First Central Hospital, No. 24, Fukang Road, Nankai District, Tianjin, 300000, China
| | - W Shen
- Department of Radiology, Tianjin First Central Hospital, No. 24, Fukang Road, Nankai District, Tianjin, 300000, China.
| | - S Xia
- Department of Radiology, Tianjin First Central Hospital, No. 24, Fukang Road, Nankai District, Tianjin, 300000, China.
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Affiliation(s)
- F F Yu
- Department of Stomatology, Qingdao Women and Children's Hospital, Qingdao 266021, China
| | - Q Cui
- Department of Periodontology, Qingdao Stomatological Hospital, Qingdao 266071, China
| | - S L Jiang
- Department of Stomatology, Qingdao Women and Children's Hospital, Qingdao 266021, China
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8
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Wang J, Sun X, Cheng Q, Cui Q. An innovative random forest-based nonlinear ensemble paradigm of improved feature extraction and deep learning for carbon price forecasting. Sci Total Environ 2021; 762:143099. [PMID: 33127140 DOI: 10.1016/j.scitotenv.2020.143099] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Revised: 10/04/2020] [Accepted: 10/11/2020] [Indexed: 05/03/2023]
Abstract
Carbon price is the basis of developing a low carbon economy. The accurate carbon price forecast can not only stimulate the actions of enterprises and families, but also encourage the study and development of low carbon technology. However, as the original carbon price series is non-stationary and nonlinear, traditional methods are less robust to predict it. In this study, an innovative nonlinear ensemble paradigm of improved feature extraction and deep learning algorithm is proposed for carbon price forecasting, which includes complete ensemble empirical mode decomposition (CEEMDAN), sample entropy (SE), long short-term memory (LSTM) and random forest (RF). As the core of the proposed model, LSTM enhanced from the recurrent neural network is utilized to establish appropriate prediction models by extracting memory features of the long and short term. Improved feature extraction, as assistant data preprocessing, represents its unique advantage for improving calculating efficiency and accuracy. Removing irrelevant features from original time series through CEEMDAN lets learning easier and it's even better for using SE to recombine similar-complexity modes. Furthermore, compared with simple linear ensemble learning, RF increases the generalization ability for robustness to achieve the final nonlinear output results. Two markets' real data of carbon trading in china are as the experiment cases to test the effectiveness of the above model. The final simulation results indicate that the proposed model performs better than the other four benchmark methods reflected by the smaller statistical errors. Overall, the developed approach provides an effective method for predicting carbon price.
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Affiliation(s)
- Jujie Wang
- School of Management Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China; Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing 210044, China.
| | - Xin Sun
- School of Management Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China
| | - Qian Cheng
- School of Management Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China
| | - Quan Cui
- School of Management Science and Engineering, Nanjing University of Information Science and Technology, Nanjing 210044, China
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9
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Cui Q, Liu D, Xiang B, Sun Q, Fan L, He M, Wang Y, Zhu X, Ye H. Morning Serum Cortisol as a Predictor for the HPA Axis Recovery in Cushing's Disease. Int J Endocrinol 2021; 2021:4586229. [PMID: 34527048 PMCID: PMC8437621 DOI: 10.1155/2021/4586229] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Accepted: 08/12/2021] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND The suppressed hypothalamic-pituitary-adrenal (HPA) axis after successful surgery for Cushing's disease (CD) will recover in almost all patients. We aimed to identify the predictive factors for HPA axis recovery in CD patients with postoperative remission. Design and Methods. This observational retrospective cross-sectional study enrolled 69 CD patients with postoperative remission in Huashan Hospital from 2015 to 2019. All subjects had a detailed clinical evaluation. The low-dose ACTH stimulation test (LDT) was conducted as the gold standard for assessing the HPA axis function. RESULTS Peak cortisol in LDT was found only to be positively correlative with morning serum cortisol (MSC) (ρ=0.451, p < 0.001). The MSC was higher (p < 0.001), and the median postoperative course was significantly longer (p=0.025) in the patients with the recovered HPA axis function compared with unrecovered patients. The AUC value of MSC for predicting the recovery of the HPA axis was 0.701, and the optimal cutoff was 6.25 μg/dl (sensitivity 85.19% and specificity 47.62%). Other useful cutoff values were 10.74 μg/dl (specificity 100%) and 4.18 μg/dl (sensitivity 100%). Besides, combined with the postoperative course, the AUC values were higher than MSC alone (0.935 vs. 0.701, p < 0.001). CONCLUSIONS MSC is a viable first-step diagnostic predictor for HPA axis recovery in CD patients with postoperative remission. For the patients with cortisol levels between 4.18 and 10.74 μg/dl, a confirmatory test should be conducted. When the MSC level was 10.74 μg/dl or greater, the replacement therapy could be discontinued.
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Affiliation(s)
- Q. Cui
- Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University, Shanghai, China
| | - D. Liu
- Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University, Shanghai, China
| | - B. Xiang
- Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University, Shanghai, China
| | - Q. Sun
- Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University, Shanghai, China
| | - L. Fan
- Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University, Shanghai, China
| | - M. He
- Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University, Shanghai, China
| | - Y. Wang
- Department of Neurosurgery, Huashan Hospital, Fudan University, Shanghai, China
| | - X. Zhu
- Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University, Shanghai, China
| | - H. Ye
- Department of Endocrinology and Metabolism, Huashan Hospital, Fudan University, Shanghai, China
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10
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Zhu N, Hou Y, Ji Y, Qu Y, Cui Q, Hui C. Genomic alterations, tumour mutation burden and prognosis of chinese cardiac sarcoma patients. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz283.058] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Uflacker A, Keefe N, Salzar R, Henderson K, Spratley E, Nacey N, David B, Whitehair R, Chahin J, Safavian D, Neiderer J, Stone J, Wick M, Cui Q, Haskal Z. Abstract No. 613 Intraarticular sodium monoiodoacetate injection induced osteoarthritis in sheep: a non-surgical large animal model for geniculate artery embolization. J Vasc Interv Radiol 2019. [DOI: 10.1016/j.jvir.2018.12.718] [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: 11/16/2022] Open
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12
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Andersen S, Cui Q, Perls T, Sebastiani P. EXPECTATIONS REGARDING AGING AMONG OFFSPRING OF CENTENARIANS. Innov Aging 2018. [DOI: 10.1093/geroni/igy023.1703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- S Andersen
- Section of Geriatrics, Department of Medicine, Boston University, Boston, MA, USA
| | - Q Cui
- Boston University School of Public Health
| | - T Perls
- Section of Geriatrics, Department of Medicine, Boston University, Boston, MA, USA
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Wang Y, Gu W, Zhang Y, Li K, Niu Z, Zheng Y, Cui Q, Wang A, Chen H, Shi W, Wang K, Yao M. Somatic and germline mutations of Chinese gastric cancer patients. Ann Oncol 2018. [DOI: 10.1093/annonc/mdy269.165] [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: 11/14/2022] Open
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14
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Zhou L, Jiang M, Shen H, You T, Ding Z, Cui Q, Ma Z, Yang F, Xie Z, Shi H, Su J, Cao L, Lin J, Yin J, Dai L, Wang H, Wang Z, Yu Z, Ruan C, Xia L. Clinical and molecular insights into Glanzmann's thrombasthenia in China. Clin Genet 2018; 94:213-220. [PMID: 29675921 DOI: 10.1111/cge.13366] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Revised: 04/08/2018] [Accepted: 04/09/2018] [Indexed: 12/19/2022]
Abstract
Glanzmann's thrombasthenia (GT) is a rare bleeding disorder characterized by spontaneous mucocutaneous bleeding. The disorder is caused by quantitative or qualitative defects in integrin αIIbβ3 (encoded by ITGA2B and ITGB3) on the platelet and is more common in consanguineous populations. However, the prevalence rate and clinical characteristics of GT in non-consanguineous populations have been unclear. We analyzed 97 patients from 93 families with GT in the Han population in China. This analysis showed lower consanguinity (18.3%) in Han patients than other ethnic populations in GT-prone countries. Compared with other ethnic populations, there was no significant difference in the distribution of GT types. Han females suffered more severe bleeding and had a poorer prognosis. We identified a total of 43 different ITGA2B and ITGB3 variants, including 25 previously unidentified, in 45 patients. These variants included 14 missense, 4 nonsense, 4 frameshift, and 3 splicing site variants. Patients with the same genotype generally manifested the same GT type but presented with different bleeding severities. This suggests that GT clinical phenotype does not solely depend on genotype. Our study provides an initial, yet important, clinical and molecular characterization of GT heterogeneity in China.
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Affiliation(s)
- L Zhou
- Key Laboratory of Thrombosis & Hemostasis of Ministry of Health, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Hematology department, Affiliated Hospital of Nantong University, Nantong, China.,Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - M Jiang
- Key Laboratory of Thrombosis & Hemostasis of Ministry of Health, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - H Shen
- Key Laboratory of Thrombosis & Hemostasis of Ministry of Health, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - T You
- Key Laboratory of Thrombosis & Hemostasis of Ministry of Health, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - Z Ding
- Key Laboratory of Thrombosis & Hemostasis of Ministry of Health, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - Q Cui
- Key Laboratory of Thrombosis & Hemostasis of Ministry of Health, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - Z Ma
- Key Laboratory of Thrombosis & Hemostasis of Ministry of Health, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - F Yang
- Key Laboratory of Thrombosis & Hemostasis of Ministry of Health, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - Z Xie
- Key Laboratory of Thrombosis & Hemostasis of Ministry of Health, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - H Shi
- Key Laboratory of Thrombosis & Hemostasis of Ministry of Health, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - J Su
- Key Laboratory of Thrombosis & Hemostasis of Ministry of Health, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - L Cao
- Key Laboratory of Thrombosis & Hemostasis of Ministry of Health, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - J Lin
- Key Laboratory of Thrombosis & Hemostasis of Ministry of Health, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - J Yin
- Key Laboratory of Thrombosis & Hemostasis of Ministry of Health, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - L Dai
- Key Laboratory of Thrombosis & Hemostasis of Ministry of Health, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - H Wang
- Department of Pediatrics/Section of Genetics, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma
| | - Z Wang
- Key Laboratory of Thrombosis & Hemostasis of Ministry of Health, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - Z Yu
- Key Laboratory of Thrombosis & Hemostasis of Ministry of Health, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - C Ruan
- Key Laboratory of Thrombosis & Hemostasis of Ministry of Health, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China
| | - L Xia
- Key Laboratory of Thrombosis & Hemostasis of Ministry of Health, Jiangsu Institute of Hematology, The First Affiliated Hospital of Soochow University, Suzhou, China.,Collaborative Innovation Center of Hematology, Soochow University, Suzhou, China.,Cardiovascular Biology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma
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15
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Wang H, Wang Y, Lu J, Cui Q, Zhao W. Infective endocarditis presenting as an acute ischemic stroke: A case report and analysis of the case series. J Neurol Sci 2017. [DOI: 10.1016/j.jns.2017.08.3157] [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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16
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Cui Q, Chen Z, Liu Q, Zhang Z, Luo Q, Fu L. Visible continuum pulses based on enhanced dispersive wave generation for endogenous fluorescence imaging. Biomed Opt Express 2017; 8:4026-4036. [PMID: 28966844 PMCID: PMC5611920 DOI: 10.1364/boe.8.004026] [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] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Revised: 07/31/2017] [Accepted: 07/31/2017] [Indexed: 06/07/2023]
Abstract
In this study, we demonstrate endogenous fluorescence imaging using visible continuum pulses based on 100-fs Ti:sapphire oscillator and a nonlinear photonic crystal fiber. Broadband (500-700 nm) and high-power (150 mW) continuum pulses are generated through enhanced dispersive wave generation by pumping femtosecond pulses at the anomalous dispersion region near zero-dispersion wavelength of high-nonlinear photonic crystal fibers. We also minimize the continuum pulse width by determining the proper fiber length. The visible-wavelength two-photon microscopy produces NADH and tryptophan images of mice tissues simultaneously. Our 500-700 nm continuum pulses support extending nonlinear microscopy to visible wavelength range that is inaccessible to 100-fs Ti:sapphire oscillators and other applications requiring visible laser pulses.
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Affiliation(s)
- Quan Cui
- Collaborative Innovation Center for Biomedical Engineering, Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
- Britton Chance Center and MOE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Zhongyun Chen
- Collaborative Innovation Center for Biomedical Engineering, Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
- Britton Chance Center and MOE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Qian Liu
- Collaborative Innovation Center for Biomedical Engineering, Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
- Britton Chance Center and MOE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Zhihong Zhang
- Collaborative Innovation Center for Biomedical Engineering, Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
- Britton Chance Center and MOE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Qingming Luo
- Collaborative Innovation Center for Biomedical Engineering, Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
- Britton Chance Center and MOE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
| | - Ling Fu
- Collaborative Innovation Center for Biomedical Engineering, Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
- Britton Chance Center and MOE Key Laboratory for Biomedical Photonics, School of Engineering Sciences, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China
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17
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Li Y, Cui Q, Li C, Wang X, Cai Y, Cui G, Yang Z. An improved multi-objective optimization model for supporting reservoir operation of China's South-to-North Water Diversion Project. Sci Total Environ 2017; 575:970-981. [PMID: 27707663 DOI: 10.1016/j.scitotenv.2016.09.165] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Revised: 09/19/2016] [Accepted: 09/19/2016] [Indexed: 06/06/2023]
Abstract
An improved multi-objective optimization model based on goal programming (GP) for supporting reservoir operation was developed under inflow senarios of multiple runoff guarantee rates (i.e., 25%, 75%, perennial mean, and 95%) and ecological goals with the combination of steady- and pulse-state ecological water demands. Under these four scenarios, discharge flows of Danjingkou Reservoir would be 358.40, 369.67, 268.91 and 98.14×108m3/a, and those at Taocha Canal headwork would be 104.61, 86.62, 95.08 and 64.00×108m3/a, respectively. The generated results for stream flows could successfully meet the predetermined operational goals for the project. Comparatively, under the scenario of 95% runoff guarantee rate, the obtained strategies could not satisfy the ecological water demands. The modeling results indicated that the capacity of water diversion and storage for Danjiangkou Reservoir would be enhanced due to the operation of the South-to-North Water Diversion Project. The results showed the risks associated with possible flooding would be comparatively low under those four runoff guarantee rates. This represents the current priority for flood control in Danjiangkou Reservoir needs to be changed into multiple ones including ecological water supply, water transfer, as well as downstream water security maintenance.
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Affiliation(s)
- Yangyang Li
- State Key Laboratory of Water Environment Simulation, Beijing Normal University, Beijing 100875, China; Key Laboratory for Water and Sediment Sciences of Ministry of Education, Beijing Normal University, Beijing 100875, China
| | - Quan Cui
- State Key Laboratory of Water Environment Simulation, Beijing Normal University, Beijing 100875, China; Key Laboratory for Water and Sediment Sciences of Ministry of Education, Beijing Normal University, Beijing 100875, China
| | - Chunhui Li
- Key Laboratory for Water and Sediment Sciences of Ministry of Education, Beijing Normal University, Beijing 100875, China.
| | - Xuan Wang
- State Key Laboratory of Water Environment Simulation, Beijing Normal University, Beijing 100875, China; Beijing Engineering Research Center for Watershed Environmental Restoration and Integrated Ecological Regulation, School of Environment, Beijing Normal University, Beijing, China.
| | - Yanpeng Cai
- State Key Laboratory of Water Environment Simulation, Beijing Normal University, Beijing 100875, China; Beijing Engineering Research Center for Watershed Environmental Restoration and Integrated Ecological Regulation, School of Environment, Beijing Normal University, Beijing, China; Institute for Energy, Environment and Sustainable Communities, University of Regina, Regina, SK, Canada
| | - Guannan Cui
- State Key Laboratory of Water Environment Simulation, Beijing Normal University, Beijing 100875, China; Key Laboratory for Water and Sediment Sciences of Ministry of Education, Beijing Normal University, Beijing 100875, China
| | - Zhifeng Yang
- State Key Laboratory of Water Environment Simulation, Beijing Normal University, Beijing 100875, China; Key Laboratory for Water and Sediment Sciences of Ministry of Education, Beijing Normal University, Beijing 100875, China
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18
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Cui Q, Cheng JG, Fan W, Taylor AE, Calder S, McGuire MA, Yan JQ, Meyers D, Li X, Cai YQ, Jiao YY, Choi Y, Haskel D, Gotou H, Uwatoko Y, Chakhalian J, Christianson AD, Yunoki S, Goodenough JB, Zhou JS. Slater Insulator in Iridate Perovskites with Strong Spin-Orbit Coupling. Phys Rev Lett 2016; 117:176603. [PMID: 27824456 DOI: 10.1103/physrevlett.117.176603] [Citation(s) in RCA: 3] [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: 05/18/2016] [Indexed: 06/06/2023]
Abstract
The perovskite SrIrO_{3} is an exotic narrow-band metal owing to a confluence of the strengths of the spin-orbit coupling (SOC) and the electron-electron correlations. It has been proposed that topological and magnetic insulating phases can be achieved by tuning the SOC, Hubbard interactions, and/or lattice symmetry. Here, we report that the substitution of nonmagnetic, isovalent Sn^{4+} for Ir^{4+} in the SrIr_{1-x}Sn_{x}O_{3} perovskites synthesized under high pressure leads to a metal-insulator transition to an antiferromagnetic (AF) phase at T_{N}≥225 K. The continuous change of the cell volume as detected by x-ray diffraction and the λ-shape transition of the specific heat on cooling through T_{N} demonstrate that the metal-insulator transition is of second order. Neutron powder diffraction results indicate that the Sn substitution enlarges an octahedral-site distortion that reduces the SOC relative to the spin-spin exchange interaction and results in the type-G AF spin ordering below T_{N}. Measurement of high-temperature magnetic susceptibility shows the evolution of magnetic coupling in the paramagnetic phase typical of weak itinerant-electron magnetism in the Sn-substituted samples. A reduced structural symmetry in the magnetically ordered phase leads to an electron gap opening at the Brillouin zone boundary below T_{N} in the same way as proposed by Slater.
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Affiliation(s)
- Q Cui
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - J-G Cheng
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
- Materials Science and Engineering Program, University of Texas at Austin, Austin, Texas 78712, USA
| | - W Fan
- Computational Condensed Matter Physical Laboratory, RIKEN, Wako, Saitama 351-0198, Japan
| | - A E Taylor
- Quantum Condensed Matter Division, Oak Ridge National Laboratory, Tennessee 37831, USA
| | - S Calder
- Quantum Condensed Matter Division, Oak Ridge National Laboratory, Tennessee 37831, USA
| | - M A McGuire
- Materials Science and Technology Division, Oak Ridge National Laboratory, Tennessee 37831, USA
| | - J-Q Yan
- Materials Science and Technology Division, Oak Ridge National Laboratory, Tennessee 37831, USA
- Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA
| | - D Meyers
- Department of Physics, University of Arkansas, Fayetteville, Arkansas 72701, USA
| | - X Li
- Materials Science and Engineering Program, University of Texas at Austin, Austin, Texas 78712, USA
| | - Y Q Cai
- Materials Science and Engineering Program, University of Texas at Austin, Austin, Texas 78712, USA
| | - Y Y Jiao
- Beijing National Laboratory for Condensed Matter Physics and Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China
| | - Y Choi
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - D Haskel
- Advanced Photon Source, Argonne National Laboratory, Argonne, Illinois 60439, USA
| | - H Gotou
- Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Chiba 277-8581, Japan
| | - Y Uwatoko
- Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Chiba 277-8581, Japan
| | - J Chakhalian
- Department of Physics and Astronomy, Rutgers University, 136 Frelinghuysen Road, Piscataway, New Jersey 08854, USA
| | - A D Christianson
- Quantum Condensed Matter Division, Oak Ridge National Laboratory, Tennessee 37831, USA
- Department of Physics and Astronomy, University of Tennessee, Knoxville, Tennessee 37966, USA
| | - S Yunoki
- Computational Condensed Matter Physical Laboratory, RIKEN, Wako, Saitama 351-0198, Japan
- Computational Materials Science Research Team, RIKEN Advanced Institute for Computational Science (AICS), Kobe, Hyogo 650-0047, Japan
- Computational Quantum Matter Research Team, RIKEN Center for Emergent Matter Science (CEMS), Wako, Saitama 351-0198, Japan
| | - J B Goodenough
- Materials Science and Engineering Program, University of Texas at Austin, Austin, Texas 78712, USA
| | - J-S Zhou
- Materials Science and Engineering Program, University of Texas at Austin, Austin, Texas 78712, USA
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19
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Abstract
Enzymology is approaching an era where many problems can benefit from computational studies. While ample challenges remain in quantitatively predicting behavior for many enzyme systems, the insights that often come from computations are an important asset for the enzymology community. Here we provide a primer for enzymologists on the types of calculations that are most useful for mechanistic problems in enzymology. In particular, we emphasize the integration of models that range from small active-site motifs to fully solvated enzyme systems for cross-validation and dissection of specific contributions from the enzyme environment. We then use a case study of the enzyme alkaline phosphatase to illustrate specific application of the methods. The case study involves examination of the binding modes of putative transition state analogues (tungstate and vanadate) to the enzyme. The computations predict covalent binding of these ions to the enzymatic nucleophile and that they adopt the trigonal bipyramidal geometry of the expected transition state. By comparing these structures with transition states found through free energy simulations, we assess the degree to which the transition state analogues mimic the true transition states. Technical issues worth treating with care as well as several remaining challenges to quantitative analysis of metalloenzymes are also highlighted during the discussion.
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Affiliation(s)
- D Roston
- Theoretical Chemistry Institute, University of Wisconsin-Madison, Madison, WI, United States.
| | - Q Cui
- Theoretical Chemistry Institute, University of Wisconsin-Madison, Madison, WI, United States.
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20
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Zhou W, Zhu L, Zhou H, Shen K, Lang J, Cui Q, Shi H. The efficacy of high-intensity, focused ultrasound treatment for non-neoplastic epithelial disorders of the vulva. Cell Mol Biol (Noisy-le-grand) 2016; 62:111-115. [PMID: 27188744] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2015] [Accepted: 04/19/2016] [Indexed: 06/05/2023]
Abstract
Non-neoplastic epithelial disorders of the vulva (NNEDV) are common types of vulval lesions. Although corticosteroids represent a first-line treatment for NNEDV, concerns exist about the safety associated with long-term topical corticosteroid use. Recently, several clinical trials have identified high-intensity focused ultrasound (HIFU) as a promising treatment modality for NNEDV. The aim of this multi-center, randomized, controlled clinical trial was to investigate the efficacy of HIFU therapy in women with NNEDV based on histological alterations. We enrolled patients who were clinically diagnosed with NNEDV. They were randomized into 2 treatment groups: 1) halcinonide for 3 months or 2) HIFU once. A total of 123 patients were biopsied both prior to and after the therapy, and 62 and 61 patients were assigned to the HIFU and halcinonide groups, respectively. The histological changes were then analyzed. After the treatments, the therapeutic effects were observed in both groups. Comparing the diagnosis and alterations in lichenoid and sclerotic patterns and in chronic inflammation, we found statistically significant differences. Furthermore, when compared with the halcinonide group, the HIFU group exhibited enhanced curative effects that were statistically significant (P = 0.039). Based on the histological evidence from this randomized, controlled trial, HIFU represents an effective method for the treatment of NNEDV.
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Affiliation(s)
- W Zhou
- Chinese Academy of Medical Sciences Department of Pathology, Peking Union Medical College Hospital Beijing China
| | - L Zhu
- Chinese Academy of Medical Sciences Department of Gynecology and Obstetrics, Peking Union Medical College Hospital Beijing China
| | - H Zhou
- Chinese Academy of Medical Sciences Department of Gynecology and Obstetrics, Peking Union Medical College Hospital Beijing China
| | - K Shen
- Chinese Academy of Medical Sciences Department of Gynecology and Obstetrics, Peking Union Medical College Hospital Beijing China
| | - J Lang
- Chinese Academy of Medical Sciences Department of Gynecology and Obstetrics, Peking Union Medical College Hospital Beijing China
| | - Q Cui
- Chinese Academy of Medical Sciences Department of Pathology, Peking Union Medical College Hospital Beijing China
| | - H Shi
- Chinese Academy of Medical Sciences Department of Gynecology and Obstetrics, Peking Union Medical College Hospital Beijing China
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21
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Wang HH, Cui Q, Zhang T, Wang ZB, Ouyang YC, Shen W, Ma JY, Schatten H, Sun QY. Rab3A, Rab27A, and Rab35 regulate different events during mouse oocyte meiotic maturation and activation. Histochem Cell Biol 2016; 145:647-57. [PMID: 26791531 DOI: 10.1007/s00418-015-1404-5] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/31/2015] [Indexed: 01/22/2023]
Abstract
Rab family members play important roles in membrane trafficking, cell growth, and differentiation. Almost all components of the cell endomembrane system, the nucleus, and the plasma membrane are closely related to RAB proteins. In this study, we investigated the distribution and functions of three members of the Rab family, Rab3A, Rab27A, and Rab35, in mouse oocyte meiotic maturation and activation. The three Rab family members showed different localization patterns in oocytes. Microinjection of siRNA, antibody injection, or inhibitor treatment showed that (1) Rab3A regulates peripheral spindle and cortical granule (CG) migration, polarity establishment, and asymmetric division; (2) Rab27A regulates CG exocytosis following MII-stage oocyte activation; and (3) Rab35 plays an important role in spindle organization and morphology maintenance, and thus meiotic nuclear maturation. These results show that Rab proteins play important roles in mouse oocyte meiotic maturation and activation and that different members exert different distinct functions.
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Affiliation(s)
- H H Wang
- College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109, China.,State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China.,Institute of Reproductive Sciences, Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, College of Animal Science and Technology, Qingdao Agricultural University, Qingdao, 266109, China
| | - Q Cui
- Institute of Reproductive Sciences, Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, College of Animal Science and Technology, Qingdao Agricultural University, Qingdao, 266109, China
| | - T Zhang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China.,Institute of Reproductive Sciences, Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, College of Animal Science and Technology, Qingdao Agricultural University, Qingdao, 266109, China
| | - Z B Wang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
| | - Y C Ouyang
- State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China
| | - W Shen
- Institute of Reproductive Sciences, Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, College of Animal Science and Technology, Qingdao Agricultural University, Qingdao, 266109, China
| | - J Y Ma
- Institute of Reproductive Sciences, Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, College of Animal Science and Technology, Qingdao Agricultural University, Qingdao, 266109, China
| | - H Schatten
- Department of Veterinary Pathobiology, University of Missouri, Columbia, MO, 65211, USA
| | - Q Y Sun
- College of Life Sciences, Qingdao Agricultural University, Qingdao, 266109, China. .,State Key Laboratory of Stem Cell and Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, China. .,Institute of Reproductive Sciences, Key Laboratory of Animal Reproduction and Germplasm Enhancement in Universities of Shandong, College of Animal Science and Technology, Qingdao Agricultural University, Qingdao, 266109, China.
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22
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Fang R, Cui Q, Sun J, Duan X, Ma X, Wang W, Cheng B, Liu Y, Hou Y, Bai G. PDK1/Akt/PDE4D axis identified as a target for asthma remedy synergistic with β2 AR agonists by a natural agent arctigenin. Allergy 2015; 70:1622-32. [PMID: 26335809 DOI: 10.1111/all.12763] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/31/2015] [Indexed: 12/13/2022]
Abstract
BACKGROUND Asthma is a heterogenetic disorder characterized by chronic inflammation with variable airflow obstruction and airway hyper-responsiveness. As the most potent and popular bronchodilators, β2 adrenergic receptor (β2 AR) agonists bind to the β2 ARs that are coupled via a stimulatory G protein to adenylyl cyclase, thereby improving cAMP accumulation and resulting in airway smooth muscle relaxation. We previously demonstrated arctigenin had a synergistic function with the β2 AR agonist, but the target for this remained elusive. METHOD Chemical proteomics capturing was used to enrich and uncover the target of arctigenin in human bronchial smooth muscle cells, and reverse docking and molecular dynamic stimulation were performed to evaluate the binding of arctigenin and its target. In vitro enzyme activities and protein levels were demonstrated with special kits and Western blotting. Finally, guinea pig tracheal muscle segregation and ex vivo function were analysed. RESULTS Arctigenin bound to PDK1 with an ideal binding free energy -25.45 kcal/mol and inhibited PDK1 kinase activity without changing its protein level. Additionally, arctigenin reduced PKB/Akt-induced phosphorylation of PDE4D, which was first identified in this study. Attenuation of PDE4D resulted in cAMP accumulation in human bronchial smooth muscle. The inhibition of PDK1 showed a synergistic function with β2 AR agonists and relaxed the constriction of segregated guinea pig tracheal muscle. CONCLUSIONS The PDK1/Akt/PDE4D axis serves as a novel asthma target, which may benefit airflow obstruction.
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Affiliation(s)
- R. Fang
- State Key Laboratory of Medicinal Chemical Biology and College of Pharmacy; Tianjin Key Laboratory of Molecular Drug Research; Nankai University; Tianjin China
- State Key Laboratory of Natural and Biomimetic Drugs; Peking University; Beijing China
- State Key Laboratory of Medicinal Chemical Biology; Department of Biochemistry; College of Life Sciences; Nankai University; Tianjin China
| | - Q. Cui
- State Key Laboratory of Medicinal Chemical Biology and College of Pharmacy; Tianjin Key Laboratory of Molecular Drug Research; Nankai University; Tianjin China
| | - J. Sun
- State Key Laboratory of Medicinal Chemical Biology and College of Pharmacy; Tianjin Key Laboratory of Molecular Drug Research; Nankai University; Tianjin China
| | - X. Duan
- State Key Laboratory of Medicinal Chemical Biology and College of Pharmacy; Tianjin Key Laboratory of Molecular Drug Research; Nankai University; Tianjin China
| | - X. Ma
- State Key Laboratory of Medicinal Chemical Biology and College of Pharmacy; Tianjin Key Laboratory of Molecular Drug Research; Nankai University; Tianjin China
| | - W. Wang
- State Key Laboratory of Medicinal Chemical Biology and College of Pharmacy; Tianjin Key Laboratory of Molecular Drug Research; Nankai University; Tianjin China
| | - B. Cheng
- State Key Laboratory of Medicinal Chemical Biology and College of Pharmacy; Tianjin Key Laboratory of Molecular Drug Research; Nankai University; Tianjin China
| | - Y. Liu
- State Key Laboratory of Medicinal Chemical Biology and College of Pharmacy; Tianjin Key Laboratory of Molecular Drug Research; Nankai University; Tianjin China
| | - Y. Hou
- State Key Laboratory of Medicinal Chemical Biology and College of Pharmacy; Tianjin Key Laboratory of Molecular Drug Research; Nankai University; Tianjin China
- State Key Laboratory of Natural and Biomimetic Drugs; Peking University; Beijing China
| | - G. Bai
- State Key Laboratory of Medicinal Chemical Biology and College of Pharmacy; Tianjin Key Laboratory of Molecular Drug Research; Nankai University; Tianjin China
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23
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Abstract
The plasmon resonance of metal nanoparticles determines their optical response in the visible spectral range. Many details such as the electronic properties of gold near the particle surface and the local environment of the particles influence the spectra. We show how the cheap but highly precise fabrication of composite nanolayers by spin-assisted layer-by-layer deposition of polyelectrolytes can be used to investigate the spectral response of gold nanospheres (GNS) and gold nanorods (GNR) in a self-consistent way, using the established Maxwell-Garnett effective medium (MGEM) theory beyond the limit of homogeneous media. We show that the dielectric function of gold nanoparticles differs from the bulk value and experimentally characterize the shape and the surrounding of the particles thoroughly by SEM, AFM and ellipsometry. Averaging the dielectric functions of the layered surrounding by an appropriate weighting with the electric field intensity yields excellent agreement for the spectra of several nanoparticles and nanorods with various cover-layer thicknesses.
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Affiliation(s)
- S Mitzscherling
- Institut für Physik und Astronomie, University of Potsdam, 14476 Potsdam, Germany.
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24
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Peng S, Wang K, Gu Y, Chen Y, Nan X, Xing J, Cui Q, Chen Y, Ge Q, Zhao H. TRAF3IP3, a novel autophagy up-regulated gene, is involved in marginal zone B lymphocyte development and survival. Clin Exp Immunol 2015; 182:57-68. [PMID: 26011558 DOI: 10.1111/cei.12658] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/20/2015] [Indexed: 12/26/2022] Open
Abstract
Tumour necrosis factor receptor-associated factor 3 (TRAF3) interacting protein 3 (TRAF3IP3; also known as T3JAM) is expressed specifically in immune organs and tissues. To investigate the impact of TRAF3IP3 on immunity, we generated Traf3ip3 knock-out (KO) mice. Interestingly, these mice exhibited a significant reduction in the number of common lymphoid progenitors (CLPs) and inhibition of B cell development in the bone marrow. Furthermore, Traf3ip3 KO mice lacked marginal zone (MZ) B cells in the spleen. Traf3ip3 KO mice also exhibited a reduced amount of serum natural antibodies and impaired T cell-independent type II (TI-II) responses to trinitrophenol (TNP)-Ficoll antigen. Additionally, our results showed that Traf3ip3 promotes autophagy via an ATG16L1-binding motif, and MZ B cells isolated from mutant mice showed a diminished level of autophagy and a high rate of apoptosis. These results suggest that TRAF3IP3 contributes to MZ B cell survival by up-regulating autophagy, thereby promoting the TI-II immune response.
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Affiliation(s)
- S Peng
- Department of Immunology, School of Basic Medical Sciences, Peking University, Beijing, China.,Human Disease Genomics Center, Peking University, Beijing, China
| | - K Wang
- Department of Immunology, School of Basic Medical Sciences, Peking University, Beijing, China
| | - Y Gu
- Human Disease Genomics Center, Peking University, Beijing, China.,Department of Medical Genetics, School of Basic Medical Sciences, Peking University, Beijing, China
| | - Y Chen
- Department of Immunology, School of Basic Medical Sciences, Peking University, Beijing, China.,Human Disease Genomics Center, Peking University, Beijing, China
| | - X Nan
- Human Disease Genomics Center, Peking University, Beijing, China.,Department of Medical Genetics, School of Basic Medical Sciences, Peking University, Beijing, China
| | - J Xing
- Human Disease Genomics Center, Peking University, Beijing, China.,Department of Medical Genetics, School of Basic Medical Sciences, Peking University, Beijing, China
| | - Q Cui
- Human Disease Genomics Center, Peking University, Beijing, China.,Department of Medical Genetics, School of Basic Medical Sciences, Peking University, Beijing, China
| | - Y Chen
- Department of Immunology, School of Basic Medical Sciences, Peking University, Beijing, China
| | - Q Ge
- Department of Immunology, School of Basic Medical Sciences, Peking University, Beijing, China
| | - H Zhao
- Human Disease Genomics Center, Peking University, Beijing, China.,Department of Medical Genetics, School of Basic Medical Sciences, Peking University, Beijing, China
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25
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Deng Z, He X, Cui Q, Zhao X, Yang Y. [Reconstruction of deep wounds in old patients with cutaneous malignant tumor after artificial dermis combined with negative pressure wound therapy]. Zhong Nan Da Xue Xue Bao Yi Xue Ban 2015; 40:539-42. [PMID: 26032081 DOI: 10.11817/j.issn.1672-7347.2015.05.014] [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: 11/03/2022]
Abstract
OBJECTIVE To evaluate the effects of artificial dermis combined with negative pressure wound therapy on repairing wound aft er resection of cutaneous malignant tumor in elderly. METHODS The clinical data of 34 hospitalized patients with cutaneous malignant tumor from July, 2009 to February, 2014 were retrospectively analyzed. The patients received local enlarged excision, artificial dermis covered wounds and 12-16 days of negative pressure wound therapy plus a free skin graft transplant on the surface with an artificial dermis. Recovery and complication aft er operation were assessed. RESULTS All wounds were restored successfully with good appearance. None severe infection happened. CONCLUSION Artificial dermis combined with negative pressure wound therapy can repair wound efficiently aft er cutaneous malignant tumor resection was performed for old patients.
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Affiliation(s)
- Zhiyun Deng
- Department of Surgery, General Hospital of Frontier Defense Corps Forces, Shenzhen 518029, China
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Li H, Cui Q, Zhang Z, Fu L, Luo Q. Nonlinear optical microscopy for immunoimaging: a custom optimized system of high-speed, large-area, multicolor imaging. Quant Imaging Med Surg 2015; 5:30-9. [PMID: 25694951 DOI: 10.3978/j.issn.2223-4292.2014.11.07] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2014] [Accepted: 10/31/2014] [Indexed: 01/09/2023]
Abstract
BACKGROUND The nonlinear optical microscopy has become the current state-of-the-art for intravital imaging. Due to its advantages of high resolution, superior tissue penetration, lower photodamage and photobleaching, as well as intrinsic z-sectioning ability, this technology has been widely applied in immunoimaging for a decade. However, in terms of monitoring immune events in native physiological environment, the conventional nonlinear optical microscope system has to be optimized for live animal imaging. Generally speaking, three crucial capabilities are desired, including high-speed, large-area and multicolor imaging. Among numerous high-speed scanning mechanisms used in nonlinear optical imaging, polygon scanning is not only linearly but also dispersion-freely with high stability and tunable rotation speed, which can overcome disadvantages of multifocal scanning, resonant scanner and acousto-optical deflector (AOD). However, low frame rate, lacking large-area or multicolor imaging ability make current polygonbased nonlinear optical microscopes unable to meet the requirements of immune event monitoring. METHODS We built up a polygon-based nonlinear optical microscope system which was custom optimized for immunoimaging with high-speed, large-are and multicolor imaging abilities. RESULTS Firstly, we validated the imaging performance of the system by standard methods. Then, to demonstrate the ability to monitor immune events, migration of immunocytes observed by the system based on typical immunological models such as lymph node, footpad and dorsal skinfold chamber are shown. Finally, we take an outlook for the possible advance of related technologies such as sample stabilization and optical clearing for more stable and deeper intravital immunoimaging. CONCLUSIONS This study will be helpful for optimizing nonlinear optical microscope to obtain more comprehensive and accurate information of immune events.
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Affiliation(s)
- Hui Li
- 1 Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and Technology, Britton Chance Center for Biomedical Photonics, Wuhan 430074, China ; 2 MoE Key Laboratory for Biomedical Photonics, Department of Biomedical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Quan Cui
- 1 Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and Technology, Britton Chance Center for Biomedical Photonics, Wuhan 430074, China ; 2 MoE Key Laboratory for Biomedical Photonics, Department of Biomedical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Zhihong Zhang
- 1 Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and Technology, Britton Chance Center for Biomedical Photonics, Wuhan 430074, China ; 2 MoE Key Laboratory for Biomedical Photonics, Department of Biomedical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Ling Fu
- 1 Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and Technology, Britton Chance Center for Biomedical Photonics, Wuhan 430074, China ; 2 MoE Key Laboratory for Biomedical Photonics, Department of Biomedical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
| | - Qingming Luo
- 1 Wuhan National Laboratory for Optoelectronics-Huazhong University of Science and Technology, Britton Chance Center for Biomedical Photonics, Wuhan 430074, China ; 2 MoE Key Laboratory for Biomedical Photonics, Department of Biomedical Engineering, Huazhong University of Science and Technology, Wuhan 430074, China
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Cui Q, Ren C, Sollars PJ, Pickard GE, So KF. The injury resistant ability of melanopsin-expressing intrinsically photosensitive retinal ganglion cells. Neuroscience 2014; 284:845-853. [PMID: 25446359 PMCID: PMC4637166 DOI: 10.1016/j.neuroscience.2014.11.002] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2014] [Revised: 10/17/2014] [Accepted: 11/04/2014] [Indexed: 12/19/2022]
Abstract
Neurons in the mammalian retina expressing the photopigment melanopsin have been identified as a class of intrinsically photosensitive retinal ganglion cells (ipRGCs). This discovery more than a decade ago has opened up an exciting new field of retinal research, and following the initial identification of photosensitive ganglion cells, several subtypes have been described. A number of studies have shown that ipRGCs subserve photoentrainment of circadian rhythms. They also influence other non-image forming functions of the visual system, such as the pupillary light reflex, sleep, cognition, mood, light aversion and development of the retina. These novel photosensitive neurons also influence form vision by contributing to contrast detection. Furthermore, studies have shown that ipRGCs are more injury-resistant following optic nerve injury, in animal models of glaucoma, and in patients with mitochondrial optic neuropathies, i.e., Leber’s hereditary optic neuropathy and dominant optic atrophy. There is also an indication that these cells may be resistant to glutamate-induced excitotoxicity. Herein we provide an overview of ipRGCs and discuss the injury-resistant character of these neurons under certain pathological and experimental conditions.
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Affiliation(s)
- Q Cui
- Guangdong-HongKong-Macau Institute of CNS Regeneration, Jinan University, Guangdong, PR China; Guangdong Medical Key Laboratory of Brain Function and Diseases, Jinan University, Guangzhou, PR China; GHM Collaboration and Innovation Center for Tissue Regeneration and Repair, Jinan University, Guangzhou, PR China
| | - C Ren
- Guangdong-HongKong-Macau Institute of CNS Regeneration, Jinan University, Guangdong, PR China; Guangdong Medical Key Laboratory of Brain Function and Diseases, Jinan University, Guangzhou, PR China; GHM Collaboration and Innovation Center for Tissue Regeneration and Repair, Jinan University, Guangzhou, PR China
| | - P J Sollars
- School of Veterinary Medicine and Biomedical Sciences, University of Nebraska, Lincoln, NE 68583, USA
| | - G E Pickard
- School of Veterinary Medicine and Biomedical Sciences, University of Nebraska, Lincoln, NE 68583, USA; Department of Ophthalmology and Visual Sciences, University of Nebraska Medical Center, Omaha, NE 68198, USA
| | - K-F So
- Guangdong-HongKong-Macau Institute of CNS Regeneration, Jinan University, Guangdong, PR China; Guangdong Medical Key Laboratory of Brain Function and Diseases, Jinan University, Guangzhou, PR China; GHM Collaboration and Innovation Center for Tissue Regeneration and Repair, Jinan University, Guangzhou, PR China; Department of Ophthalmology, University of Hong Kong, Hong Kong.
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Wang W, Ye Y, Li J, Li X, Zhou X, Tan D, Jin Y, Wu E, Cui Q, Wu M. Lyn regulates cytotoxicity in respiratory epithelial cells challenged by cigarette smoke extracts. Curr Mol Med 2014; 14:663-72. [PMID: 24894179 DOI: 10.2174/1566524014666140603095027] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2013] [Revised: 12/16/2013] [Accepted: 02/02/2014] [Indexed: 11/22/2022]
Abstract
Cigarette smoking is associated with a series of lung diseases such as cancer, chronic obstructive pulmonary disease (COPD), and asthma. Despite the intense interest, the underlying molecular mechanism in smoking-related diseases is incompletely understood. Here, we show that Lyn is involved in cytotoxicity of respiratory epithelial cells induced by cigarette smoke extracts (CSE), an in vitro culture model for evaluating tobacco toxicity. In addition, exposure to CSE promotes the activation of JAK2 and STAT1, which is responsible for CSE-induced cytotoxicity. Moreover, a Lyn specific siRNA, Lyn dominant negative construct and pharmacological inhibitor all alleviated CSE-induced cytotoxicity in lung cells to different extents, respectively. Furthermore, Lyn also influences the phagocytosis of bacteria by murine alveolar macrophages, extending its impact on innate immunity. Taken together, these findings indicate that Lyn may play a role in the regulation of cigarette smoking-induced lung cell death, and may be a potential novel therapeutic target for cigarette smoking related lung diseases.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | - M Wu
- Department of Basic Sciences, University of North Dakota, Grand Forks, ND, USA.
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29
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Jeewa A, Sexon-Tejtel S, Cui Q, Dreyer W, Price J, Cabrera A, Zaruca K, Looney C, Sami S, Denfield S, Pignatelli R. The Utility of Speckle Tracking Echocardiography (STE) Derived Strain for the Detection of Acute Rejection after Pediatric Heart Transplantation. J Heart Lung Transplant 2013. [DOI: 10.1016/j.healun.2013.01.464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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30
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DiPietro A, Sexson-Tejtel S, Pignatelli R, Cui Q, Cabrera A, Price J, Mitchell D, Dreyer W, Jeewa A, Denfield S. Noninvasive Predictors of Diastolic Dysfunction in Children after Cardiac Transplant. J Heart Lung Transplant 2013. [DOI: 10.1016/j.healun.2013.01.463] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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31
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Cui Q, S. Shin W, Luo Y, Tian J, Cui H, Yin D. Thymidylate Kinase: An Old Topic Brings New Perspectives. Curr Med Chem 2013; 20:1286-305. [DOI: 10.2174/0929867311320100006] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2012] [Revised: 01/03/2013] [Accepted: 01/11/2013] [Indexed: 11/22/2022]
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Yue C, Li J, Li M, Zhang F, Zhao D, Cui Q. Cardiac mass in Behçet's disease. Clin Exp Rheumatol 2012; 30:S27-S31. [PMID: 22935263] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2011] [Accepted: 02/17/2012] [Indexed: 06/01/2023]
Abstract
Cardiac mass is a rare manifestation of Behçet's disease (BD). Intracardiac thrombosis, endomyocardiofibrosis, endocardial fibroelastosis, inflammatory mass and cystic change have been reported as different entities of cardiac mass in BD. Here we presented 6 cases of this rare manifestation of BD. The clinical and pathological features were reviewed.
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Affiliation(s)
- C Yue
- Department of Rheumatology, Peking Union Medical College Hospital, Beijing, China
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Cui Q, Wang X, Li D, Guo X. An ecosystem health assessment method integrating geochemical indicators of soil in Zoige wetland, southwest China. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.proenv.2012.01.145] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Lin DP, Deng ZY, He XD, Cui Q, Zhao XL, Yang Y, Luo TS. Ulinastatin in combination with glutamine dipeptide reduces serum levels of TNF-α, endotoxin and IL-6 in patients with severe acute pancreatitis. Shijie Huaren Xiaohua Zazhi 2011; 19:1946-1949. [DOI: 10.11569/wcjd.v19.i18.1946] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To evaluate the impact of protease inhibitor ulinastatin in combination with glutamine dipeptide on serum levels of TNF-α, endotoxin, IL-6 and IL-18 in patients with severe acute pancreatitis (SAP).
METHODS: Sixty-four SAP patients were divided into two groups: treatment group (n = 32) and control group (n = 32). The control group was treated with ulinastatin alone, while the treatment group was treated with ulinastatin in combination with glutamine dipeptide. The treatment lasted for 10 days. The changes in serum levels of TNF-α, endotoxin, IL-6 and IL-18 were determined by ELISA.
RESULTS: Compared to the control group, serum levels of TNF-α and endotoxin on days 7 and 10 (7 d: 38.83 ± 14.71 vs 51.92 ± 18.29; 0.46 ± 0.13 vs 0.71 ± 0.19; 10 d: 31.49 ± 12.65 vs 48.36 ± 15.43; 0.22 ± 0.07 vs 0.43 ± 0.15; all P < 0.05) and that of IL-6 on day 7 (117.68 ± 14.87 vs 163.43 ± 19.76, P < 0.05) were significantly lower in the treatment group. There was no significant difference in serum level of IL-18 between the two groups of patients (P > 0.05).
CONCLUSION: Ulinastatin in combination with glutamine dipeptide can reduce serum levels of TNF-α, endotoxin and IL-6 in SAP patients.
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Ma L, Sundlass NK, Raines RT, Cui Q. Disruption and formation of surface salt bridges are coupled to DNA binding by the integration host factor: a computational analysis. Biochemistry 2010; 50:266-75. [PMID: 21121696 DOI: 10.1021/bi101096k] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Revealing the thermodynamic driving force of protein-DNA interactions is crucial to the understanding of factors that dictate the properties and function of protein-DNA complexes. For the binding of DNA to DNA-wrapping proteins, such as the integration host factor (IHF), Record and co-workers proposed that the disruption of a large number of preexisting salt bridges is coupled with the binding process [Holbrook, J. A., et al. (2001) J. Mol. Biol. 310, 379]. To test this proposal, we have conducted explicit solvent MD simulations (multiple ∼25-50 ns trajectories for each salt concentration) to examine the behavior of charged residues in IHF, especially concerning their ability to form salt bridges at different salt concentrations. Of the 17 cationic residues noted by Record and co-workers, most are engaged in salt bridge interactions for a significant portion of the trajectories, especially in the absence of salt. This observation suggests that, from a structural point of view, their proposal is plausible. However, the complex behaviors of charged residues observed in the MD simulations also suggest that the unusual thermodynamic characteristics of IHF-DNA binding likely arise from the interplay between complex dynamics of charged residues both in and beyond the DNA binding site. Moreover, a comparison of MD simulations at different salt concentrations suggests that the strong dependence of the IHF-DNA binding enthalpy on salt concentration may not be due to a significant decrease in the number of stable salt bridges in apo IHF at high salt concentrations. In addition to the Hofmeister effects quantified in more recent studies of IHF-DNA binding, we recommend consideration of the variation of the enthalpy change of salt bridge disruption at different salt concentrations. Finally, the simulation study presented here explicitly highlights the fact that the electrostatic properties of DNA-binding proteins can be rather different in the apo and DNA-bound states, which has important implications for the design of robust methods for predicting DNA binding sites in proteins.
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Affiliation(s)
- L Ma
- Graduate Program in Biophysics, University of Wisconsin, Madison, 53706, United States
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Gravani S, Polychronopoulou K, Stolojan V, Cui Q, Gibson PN, Hinder SJ, Gu Z, Doumanidis CC, Baker MA, Rebholz C. Growth and characterization of ceria thin films and Ce-doped γ-Al2O3 nanowires using sol-gel techniques. Nanotechnology 2010; 21:465606. [PMID: 20975211 DOI: 10.1088/0957-4484/21/46/465606] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
γ-Al(2)O(3) is a well known catalyst support. The addition of Ce to γ-Al(2)O(3) is known to beneficially retard the phase transformation of γ-Al(2)O(3) to α-Al(2)O(3) and stabilize the γ-pore structure. In this work, Ce-doped γ-Al(2)O(3) nanowires have been prepared by a novel method employing an anodic aluminium oxide (AAO) template in a 0.01 M cerium nitrate solution, assisted by urea hydrolysis. Calcination at 500 °C for 6 h resulted in the crystallization of the Ce-doped AlOOH gel to form Ce-doped γ-Al(2)O(3) nanowires. Ce(3+) ions within the nanowires were present at a concentration of < 1 at.%. On the template surface, a nanocrystalline CeO(2) thin film was deposited with a cubic fluorite structure and a crystallite size of 6-7 nm. Characterization of the nanowires and thin films was performed using scanning electron microscopy, transmission electron microscopy, electron energy loss spectroscopy, x-ray photoelectron spectroscopy and x-ray diffraction. The nanowire formation mechanism and urea hydrolysis kinetics are discussed in terms of the pH evolution during the reaction. The Ce-doped γ-Al(2)O(3) nanowires are likely to find useful applications in catalysis and this novel method can be exploited further for doping alumina nanowires with other rare earth elements.
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Affiliation(s)
- S Gravani
- Mechanical and Manufacturing Engineering Department, Engineering School, University of Cyprus, Nicosia, Cyprus
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37
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Deng ZY, Guo GH, Yang Y, Zhao XL, Cui Q. Effect of early enteral immunonutrition on the secretion of TH1/TH2 cytokines in Peyer's patches of scalded rats. Shijie Huaren Xiaohua Zazhi 2010; 18:2359-2364. [DOI: 10.11569/wcjd.v18.i22.2359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the changes in the secretion of TH1/TH2 cytokines in Peyer's patches of scalded rats after enteral nutrition supplementation.
METHODS: Sixty-four Sprague-Dawley rats were divided into EN group (n = 32) and EIN group (n = 32). Rats were subjected to a 30% TBSA III degree scald injury. The EN group was given standard enteral nutrition (Nutrison Multi Fibre), while the EIN group was given enteral immunonutrition. Peyer's patches were excised to isolate lymphocytes to determine the changes in the secretion of TH1/TH2 cytokines.
RESULTS: On day 1 after scalding, the concentrations of IL-2 and IFN-γ released from Peyer's patch lymphocytes were significantly higher in the two experimental groups compared with pre-scald values (19.7 ± 7.3 vs 92.6 ±21.3 and 97.6 ± 25.4; 63.7 ± 27.3 vs 279.4 ± 89.7 and 292.7 ± 97.4; all P < 0.01). On day 10, the concentrations of IL-2 and IFN-γ released from Peyer's patch lymphocytes were significantly lower in the EIN group than in the EN group (41.6 ± 16.5 vs 55.9 ± 14.4; 71.6 ± 26.9 vs 104.3 ± 31.7; both P < 0.01 or 0.05). The concentrations of IL-4 and IL-10 were significantly higher in the EIN group than in the EN group on days 4, 7 and 10.
CONCLUSION: The expression of Th1 cytokines is up-regulated in Peyer's patches of scalded rats. Enteral immunonutrition supplementation can promote the expression of Th2 cytokines, help correct TH2/TH1 imbalance, and improve mucosal barrier function.
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Zhang W, Feng S, Yan S, Zhao Y, Li M, Sun J, Zhang FC, Cui Q, Dong Y. Incidence of malignancy in primary Sjogren's syndrome in a Chinese cohort. Rheumatology (Oxford) 2009; 49:571-7. [DOI: 10.1093/rheumatology/kep404] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Deng ZY, Guo GH, Xing JJ, Zhao XL, Cui Q, Yang Y. Effects of early enteral glutamine supplementation on lymphocyte subpopulations in Peyer's patches in scalded rats. Shijie Huaren Xiaohua Zazhi 2009; 17:2679-2685. [DOI: 10.11569/wcjd.v17.i26.2679] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
AIM: To investigate the changes in the number of total lymphocytes and each lymphocyte subpopulation in Peyer's patches in scalded rats receiving different nutrition support, and examine the effects of glutamine (Gln) supplementation on intestinal immunity.
METHODS: Healthy adult Sprague-Dawley rats were subjected to a 30% TBSA third-degree scald injury to induce scald injury. Scalded rats were randomly divided into standard enteral nutrition group (EN group) and glutamine supplementation group (EN plus Gln group). Rats in the EN group were fed standard enteral nutrition (Nutrison Multi Fibre) while those in the EN plus Gln group were fed standard enteral nutrition plus Gln. The number of total lymphocytes and each lymphocyte subpopulation in Peyer's patches were then determined by flow cytometry on days 1, 4, 7 and 10 after feeding.
RESULTS: The number of total lymphocytes, especially B lymphocytes, in Peyer's patches significantly decreased in response to scald induction. The number of total lymphocytes in Peyer's patches in rats in the EN plus Gln group, but not in the EN group, returned to normal on day 7 after scald induction [(5.29 ± 1.03) × 106vs (6.13 ± 1.14) × 106, P > 0.05]. The total number of B cells in Peyer's patches in rats in the EN plus Gln group on days 7 and 10 showed no significant changes when compared with pre-induction value [(2.87 ± 0.69) × 106 and (3.05 ± 0.72) × 106vs (3.29 ± 0.62) × 106, respectively; both P> 0.05]. In contrast, the total number of B cells in Peyer's patches in rats in the EN group on day 10 was significantly lower than pre-induction value [(2.07 ± 0.63) × 106vs (3.29 ± 0.62) × 106; P < 0.05]. Scald induction had no significant effect on the number of CD4+ and CD8+ lymphocytes (both P > 0.05).
CONCLUSION: The number of total lymphocytes decreases significantly in response to scald induction. Early enteral glutamine supplementation can promote lymphocyte proliferation, increase the number of total lymphocytes (especially B cells) in Peyer's patches, and enhance intestinal immunity in scalded rats.
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Brooks B, Brooks C, MacKerell A, Nilsson L, Petrella R, Roux B, Won Y, Archontis G, Bartels C, Boresch S, Caflisch A, Caves L, Cui Q, Dinner A, Feig M, Fischer S, Gao J, Hodoscek M, Im W, Kuczera K, Lazaridis T, Ma J, Ovchinnikov V, Paci E, Pastor R, Post C, Pu J, Schaefer M, Tidor B, Venable RM, Woodcock HL, Wu X, Yang W, York D, Karplus M. CHARMM: the biomolecular simulation program. J Comput Chem 2009; 30:1545-614. [PMID: 19444816 PMCID: PMC2810661 DOI: 10.1002/jcc.21287] [Citation(s) in RCA: 5887] [Impact Index Per Article: 392.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
CHARMM (Chemistry at HARvard Molecular Mechanics) is a highly versatile and widely used molecular simulation program. It has been developed over the last three decades with a primary focus on molecules of biological interest, including proteins, peptides, lipids, nucleic acids, carbohydrates, and small molecule ligands, as they occur in solution, crystals, and membrane environments. For the study of such systems, the program provides a large suite of computational tools that include numerous conformational and path sampling methods, free energy estimators, molecular minimization, dynamics, and analysis techniques, and model-building capabilities. The CHARMM program is applicable to problems involving a much broader class of many-particle systems. Calculations with CHARMM can be performed using a number of different energy functions and models, from mixed quantum mechanical-molecular mechanical force fields, to all-atom classical potential energy functions with explicit solvent and various boundary conditions, to implicit solvent and membrane models. The program has been ported to numerous platforms in both serial and parallel architectures. This article provides an overview of the program as it exists today with an emphasis on developments since the publication of the original CHARMM article in 1983.
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Affiliation(s)
- B.R. Brooks
- Laboratory of Computational Biology, National Heart, Lung, and
Blood Institute, National Institutes of Health, Bethesda, MD 20892
| | - C.L. Brooks
- Departments of Chemistry & Biophysics, University of
Michigan, Ann Arbor, MI 48109
| | - A.D. MacKerell
- Department of Pharmaceutical Sciences, School of Pharmacy,
University of Maryland, Baltimore, MD, 21201
| | - L. Nilsson
- Karolinska Institutet, Department of Biosciences and Nutrition,
SE-141 57, Huddinge, Sweden
| | - R.J. Petrella
- Department of Chemistry and Chemical Biology, Harvard University,
Cambridge, MA 02138
- Department of Medicine, Harvard Medical School, Boston, MA
02115
| | - B. Roux
- Department of Biochemistry and Molecular Biology, University of
Chicago, Gordon Center for Integrative Science, Chicago, IL 60637
| | - Y. Won
- Department of Chemistry, Hanyang University, Seoul
133–792 Korea
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - M. Karplus
- Department of Chemistry and Chemical Biology, Harvard University,
Cambridge, MA 02138
- Laboratoire de Chimie Biophysique, ISIS, Université de
Strasbourg, 67000 Strasbourg France
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Abstract
Following injury to the nervous system, the activation of macrophages, microglia, and T-cells profoundly affects the ability of neurons to survive and to regenerate damaged axons. The primary visual pathway provides a well-defined model system for investigating the interactions between the immune system and the nervous system after neural injury. Following damage to the optic nerve in mice and rats, retinal ganglion cells, the projection neurons of the eye, normally fail to regenerate their axons and soon begin to die. Induction of an inflammatory response in the vitreous strongly enhances the survival of retinal ganglion cells and enables these cells to regenerate lengthy axons beyond the injury site. T cells modulate this response, whereas microglia are thought to contribute to the loss of retinal ganglion cells in this model and in certain ocular diseases. This review discusses the complex and sometimes paradoxical actions of blood-borne macrophages, resident microglia, and T-cells in determining the outcome of injury in the primary visual pathway.
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Affiliation(s)
- Q Cui
- Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, 147K Argyle Street, Kowloon, Hong Kong, PR China.
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Cui Q, Zhou H, Zhao R, Liu J, Yang X, Zhu H, Zheng Q, Gu C, Yi D. The Effects of Open Lung Ventilation on Respiratory Mechanics and Haemodynamics in Atelectatic Infants after Cardiopulmonary Bypass. J Int Med Res 2009; 37:113-20. [PMID: 19215680 DOI: 10.1177/147323000903700113] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Acute lung injury (ALI) frequently occurs in infants after cardiopulmonary bypass (CPB) surgery and it sometimes develops into acute respiratory distress syndrome in critically ill infants, which can be life threatening. This study investigated the effects of open lung ventilation on the haemodynamics and respiratory mechanics of 64 infants (34 males; 30 females) with a mean ± SD age of 8.3 ± 0.3 months who developed ALI following CPB surgery. Open lung ventilation significantly improved the respiratory mechanics and oxygenation parameters of the infants, including the partial pressure of oxygen in arterial blood (PaO2), the ratio of PaO2/FiO2 (fraction of inspired oxygen), peak inspiratory pressure, static compliance and airway resistance. It is concluded that open lung ventilation can greatly improve oxygenation and respiratory mechanics in infants with ALI following CPB surgery.
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Affiliation(s)
- Q Cui
- Department of Cardiovascular Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, China
| | - H Zhou
- Department of Cardiovascular Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, China
| | - R Zhao
- Department of Cardiovascular Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, China
| | - J Liu
- Department of Cardiovascular Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, China
| | - X Yang
- Department of Cardiovascular Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, China
| | - H Zhu
- Department of Cardiovascular Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, China
| | - Q Zheng
- Department of Cardiovascular Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, China
| | - C Gu
- Department of Cardiovascular Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, China
| | - D Yi
- Department of Cardiovascular Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, China
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Kuhlmann T, Miron V, Cui Q, Cuo Q, Wegner C, Antel J, Brück W. Differentiation block of oligodendroglial progenitor cells as a cause for remyelination failure in chronic multiple sclerosis. Brain 2008; 131:1749-58. [PMID: 18515322 DOI: 10.1093/brain/awn096] [Citation(s) in RCA: 600] [Impact Index Per Article: 37.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Impaired function/differentiation of progenitor cells might provide an explanation for the limited remyelination observed in the majority of chronic multiple sclerosis lesions. Here, we establish that in the normal adult human CNS, the transcription factors Nkx2.2 and Olig2 are strongly expressed in progenitor cells while mature oligodendrocytes are characterized by low levels of Olig2 or Nkx2.2. In vitro studies confirmed the expression of Olig2 in oligodendroglial progenitor cells and mature oligodendrocytes while astrocytes, microglial cells and neurons were negative for Olig2. In early multiple sclerosis lesions, we found Olig2-positive progenitor cells throughout all lesion stages and in periplaque white matter (PPWM). The number of progenitors in PPWM was significantly increased compared with the white matter from controls. In chronic multiple sclerosis lesions progenitor cells were still present, however, in significantly lower numbers than in early multiple sclerosis lesions. A subpopulation of progenitor cells in early multiple sclerosis lesions and PPWM but not in control cases co-expressed NogoA, a marker of mature oligodendrocytes. The co-expression of these two markers suggested that these cells were maturing oligodendrocytes recently recruited from the progenitor pool. In contrast, in chronic multiple sclerosis lesions maturing progenitors were only rarely present. In summary, we provide evidence that a differentiation block of oligodendroglial progenitors is a major determinant of remyelination failure in chronic multiple sclerosis lesions.
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Affiliation(s)
- T Kuhlmann
- Institute of Neuropathology, University Hospital Münster, Münster, Domagkstr. 19, 48149 Münster, Germany
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Hu X, Li T, Bi S, Jin Z, Zhou G, Bai C, Li L, Cui Q, Liu W. Possible role of hydrogen sulfide on the preservation of donor rat hearts. Transplant Proc 2008; 39:3024-9. [PMID: 18089314 DOI: 10.1016/j.transproceed.2007.05.086] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2007] [Accepted: 05/23/2007] [Indexed: 11/28/2022]
Abstract
OBJECTIVE The aim of this study was to observe the preservative effect of hydrogen sulfide (H2S) on donor rat hearts. MATERIALS AND METHODS The hearts of 24 Sprague-Dawley rats were perfused on a Langendorff perfusion column for 30 minutes. We calculated and recorded the left ventricular-developed pressure (LVDP), and positive and negative derivatives of left ventricular systolic pressure (LVSP; +dP/dt and -dP/dt). Hearts were then arrested and stored for 6 hours at 4 degrees C: group 1, Krebs-Henseleit (KH) solution; group 2, KH solution with 1 micromol/L NaHS; group 3, KH solution with 1 micromol/L NaHS and 10 micromol/L glibenclamide; group 4, St. Thomas II solution. Hearts were transferred back to the Langendorff column. After stabilizing for 30 minutes, LV performance was assessed as before. The donor hearts were kept for pathological study including myocardial water ratio, ATP content, and myocyte apoptosis index. RESULTS The recovery rates of +dp/dtmax, -dp/dtmax, and LVDP of groups 2 and 4 were much better than those of groups 1 and 3. The hearts contracted immediately after reperfusion in group 4. Ventricular fibrillation was seen before contraction in the other 3 groups, with the longest duration in group. No significant difference in myocardial water ratio was found. The ATP content was the highest in group 2. Apoptosis was observed in the 4 groups with the lowest apoptosis index in group 2. CONCLUSIONS H2S has a protective effect on rat donor hearts at the concentration of 1 micromol/L. The protective effect is better than that of St. Thomas II solution. The protective effect of H2S can be blocked by glibenclamide.
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Affiliation(s)
- X Hu
- Cardiovascular Surgery Department, Xijing Hospital, Fourth Military Medical University, XI'an, People's Republic of China
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Huang Y, Cen LP, Luo JM, Wang N, Zhang MZ, van Rooijen N, Pang CP, Cui Q. Differential roles of phosphatidylinositol 3-kinase/akt pathway in retinal ganglion cell survival in rats with or without acute ocular hypertension. Neuroscience 2008; 153:214-25. [PMID: 18358617 DOI: 10.1016/j.neuroscience.2008.02.007] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2007] [Revised: 02/04/2008] [Accepted: 02/05/2008] [Indexed: 11/30/2022]
Abstract
Intraocular pressure (IOP) elevation has often been used as an experimental model to study mechanisms underlying retinal ganglion cell (RGC) death associated with ocular ischemic injury and glaucoma. The aim of the present study, using both in vitro and in vivo approaches, was to investigate the role of phosphatidylinositol 3-kinase (PI3K)/akt pathway in RGC viability in normal rats and rats following transient IOP elevation. For in vivo studies, pathway inhibitors were administered intravitreally on days 3, 9, and 15 post-2-h IOP elevation at 110 mm Hg. Toward the end of the 3-week examination period, the fluorescent dye Fluorogold was used to retrogradely label surviving RGCs. In order to examine the role of macrophages that were recruited into the eye following the pathway inhibition, clodronate liposomes were used to deplete phagocytic cells in the eye. PI3K/akt pathway activity and location in the retina were examined using Western blot and immunohistochemistry, respectively. Here we showed that PI3K/akt inhibitors 2-(4-morpholinyl)-8-phenyl-1(4H)-benzopyran-4-one hydrochloride (LY294002) and KY12420 at low concentrations (2 microM or 20 microM) did not influence RGC survival but caused RGC loss at high concentration (200 muM) in retinal explants derived from intact rats. In contrast, both LY294002 and KY12420 at 20 microM led to RGC loss in retinal explants derived from IOP-elevated eyes. A detrimental action of phagocytic cells on RGC survival was also seen in these retinas. In vivo results confirmed the detrimental actions of PI3K/akt inhibition and macrophages on RGC survival in IOP-elevated, but not intact eyes even with high concentration of LY294002. Low level of PI3K/akt activity was detected in the ganglion cell layer (GCL) in intact retina. Acute IOP elevation activated PI3K/akt pathway in the inner nuclear layer and GCL including RGCs. This study thus demonstrates that PI3K/akt pathway mediates RGC survival after IOP elevation but not under normal condition.
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Affiliation(s)
- Y Huang
- Department of Ophthalmology and Visual Sciences, The Chinese University of Hong Kong, 147K Argyle Street, Kowloon, Hong Kong, People's Republic of China
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Awan A, Bari H, Yan F, Moksong S, Yang S, Chowdhury S, Cui Q, Yu Z, Purisima EO, Wang E. Regulatory network motifs and hotspots of cancer genes in a mammalian cellular signalling network. IET Syst Biol 2007; 1:292-7. [PMID: 17907678 DOI: 10.1049/iet-syb:20060068] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Mutations or overexpression of signalling genes can result in cancer development and metastasis. In this study, we manually assembled a human cellular signalling network and developed a robust bioinformatics strategy for extracting cancer-associated single nucleotide polymorphisms (SNPs) using expressed sequence tags (ESTs). We then investigated the relationships of cancer-associated genes [cancer-associated SNP genes, known as cancer genes (CG) and cell mobility genes (CMGs)] in a signalling network context. Through a graph-theory-based analysis, we found that CGs are significantly enriched in network hub proteins and cancer-associated genes are significantly enriched or depleted in some particular network motif types. Furthermore, we identified a substantial number of hotspots, the three- and four-node network motifs in which all nodes are either CGs or CMGs. More importantly, we uncovered that CGs are enriched in the convergent target nodes of most network motifs, although CMGs are enriched in the source nodes of most motifs. These results have implications for the foundations of the regulatory mechanisms of cancer development and metastasis.
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Affiliation(s)
- A Awan
- Biotechnology Research Institute, National Research Council Canada, Montreal, Quebec, Canada H4P 2R2
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König PH, Hoffmann M, Frauenheim T, Cui Q. A critical evaluation of different QM/MM frontier treatments with SCC-DFTB as the QM method. J Phys Chem B 2007; 109:9082-95. [PMID: 16852081 DOI: 10.1021/jp0442347] [Citation(s) in RCA: 135] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The performance of different link atom based frontier treatments in QM/MM simulations was evaluated critically with SCC-DFTB as the QM method. In addition to the analysis of gas-phase molecules as in previous studies, an important element of the present work is that chemical reactions in realistic enzyme systems were also examined. The schemes tested include all options available in the program CHARMM for SCC-DFTB/MM simulation, which treat electrostatic interactions due to the MM atoms close to the QM/MM boundary in different ways. In addition, a new approach, the divided frontier charge (DIV), has been implemented in which the partial charge associated with the frontier MM atom ("link host") is evenly distributed to the other MM atoms in the same group. The performance of these schemes was evaluated based on properties including proton affinities, deprotonation energies, dipole moments, and energetics of proton transfer reactions. Similar to previous work, it was found that calculated proton affinities and deprotonation energies of alcohols, carbonic acids, amino acids, and model DNA bases are very sensitive to the link atom scheme; the commonly used single link atom approach often gives error on the order of 15 to 20 kcal/mol. Other schemes give better and, on average, mutually comparable results. For proton transfer reactions, encouragingly, both activation barriers and reaction energies are fairly insensitive (within a typical range of 2-4 kcal/mol) to the link atom scheme due to error cancellation, and this was observed for both gas-phase and enzyme systems. Therefore, the effect of using different link atom schemes in QM/MM simulations is rather small for chemical reactions that conserve the total charge. Although the current study used an approximate DFT method as the QM level, the observed trends are expected to be applicable to QM/MM methods with use of other QM approaches. This observation does not mean to encourage QM/MM simulations without careful benchmark in the study of specific systems, rather it emphasizes that other technical details, such as the treatment of long-range electrostatics, tend to play a more important role and need to be handled carefully.
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Affiliation(s)
- P H König
- Theoretische Physik, Universität Paderborn, Warburger Strasse 100, 33098 Paderborn, Germany
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Cui Q, Hodgetts SI, Hu Y, Luo JM, Harvey AR. Strain-specific differences in the effects of cyclosporin A and FK506 on the survival and regeneration of axotomized retinal ganglion cells in adult rats. Neuroscience 2007; 146:986-99. [PMID: 17408862 DOI: 10.1016/j.neuroscience.2007.02.034] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2006] [Revised: 01/14/2007] [Accepted: 02/14/2007] [Indexed: 02/07/2023]
Abstract
The immune response can influence neuronal viability and plasticity after injury, effects differing in strains of rats with different susceptibility to autoimmune disease. We assessed the effects of i.p. injections of cyclosporin A (CsA) or FK506 on adult retinal ganglion cell (RGC) survival and axonal regeneration into peripheral nerve (PN) autografted onto the cut optic nerve of rats resistant (Fischer F344) or vulnerable (Lewis) to autoimmune disease. Circulating and tissue CsA and FK506 levels were similar in both strains. Three weeks after autologous PN transplantation the number of viable beta-III tubulin-positive RGCs was significantly greater in CsA- and FK506-treated F344 rats compared with saline-injected controls. RGC survival in Lewis rats was not significantly altered. In F344 rats, retrograde labeling of RGCs revealed that CsA or FK506 treatment significantly increased the number of RGCs that regenerated an axon into a PN autograft; however these agents had no beneficial effect on axonal regeneration in Lewis rats. PN grafts in F344 rats also contained comparatively more pan-neurofilament immunoreactive axons. In both strains, 3 weeks after transplantation CsA or FK506 treatment resulted in increased retinal macrophage numbers, but only in F344 rats was this increase significant. At this time-point PN grafts in both strains contained many macrophages and some T cells. T cell numbers in Lewis rats were significantly greater than in F344 animals. The increased RGC axonal regeneration seen in CsA- or FK506-treated F344 but not Lewis rats shows that modulation of immune responses after neurotrauma has complex and not always predictable outcomes.
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Affiliation(s)
- Q Cui
- School of Anatomy and Human Biology, The University of Western Australia, 35 Stirling Highway, Crawley, Perth, Western Australia 6009, Australia.
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Zhou HP, Yi DH, Yu SQ, Sun GC, Cui Q, Zhu HL, Liu JC, Zhang JZ, Wu TJ. Administration of donor-derived mesenchymal stem cells can prolong the survival of rat cardiac allograft. Transplant Proc 2007; 38:3046-51. [PMID: 17112896 DOI: 10.1016/j.transproceed.2006.10.002] [Citation(s) in RCA: 105] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2006] [Indexed: 12/11/2022]
Abstract
BACKGROUND Mesenchymal stem cells (MSCs) are multipotent adult elements that have recently been shown to have profound immunomodulatory effects both in vitro and in vivo. Herein we have examined the impact of intravenous infusion of donor MSCs on the survival of transplanted hearts in a rat allograft model. METHODS Recipient Fisher344 rats were transplanted with hearts from inbred Wistar rats. Wistar rat MSCs were infused via the tail vein at designated intervals. In vitro mixed lymphocyte reaction (MLR) and cell-mediated lympholysis (CML) assays were performed to assess whether MSCs downregulated T-cell responses in vivo. Real-time polymerase chain reaction (PCR) was used to analyze the Th1/Th2 balance in MSC-treated and control groups. RESULTS The MSCs cultured in vitro exhibited multipotential for differentiation. Survival of the allografts was markedly prolonged by administration of MSCs compared with the controls, namely mean survivals of 12.4 vs 6.4 days, respectively. Real-time PCR showed a shift in the Th1/Th2 balance toward Th2. By MLR and CML assays, untreated control rats showed greater alloreactivity than did MSC-treated rats. CONCLUSION Our results indicated that MSCs suppressed allogeneic T-cell responses both in vitro and in vivo. Intravenous administration of MSCs prolonged the survival of transplanted hearts, possibly by induction of allograft tolerance through changing the Th1/Th2 balance.
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Affiliation(s)
- H P Zhou
- Department of Cardiovascular Surgery, Xijing Hospital, Fourth Military Medical University, Xi'an City, Shannxi Province, China.
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Varandas AJC, Caridade PJSB, Zhang JZH, Cui Q, Han KL. Dynamics of X+CH4 (X=H,O,Cl) reactions: How reliable is transition state theory for fine-tuning potential energy surfaces? J Chem Phys 2006; 125:64312. [PMID: 16942291 DOI: 10.1063/1.2217953] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Trajectory calculations run on global potential energy surfaces have shown that the topology of the entrance channel has strong implications on the dynamics of the title reactions. This may explain why huge differences are observed between the rate constants calculated from global dynamical methods and those obtained from local methods that employ the same potential energy surfaces but ignore such topological details. Local dynamics approaches such as transition state-based theories should then be used with caution for fine-tuning potential energy surfaces, especially for fast reactions with polyatomic species since the key statistical assumptions of the theory may not be valid for all degrees of freedom.
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Affiliation(s)
- A J C Varandas
- Departamento de Química, Universidade de Coimbra, 3004-535 Coimbra, Portugal.
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