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Zuo W, An Z, Zhang B, Hu Z. Solution of nonlinear Lamb waves in plates with discontinuous thickness. J Acoust Soc Am 2024; 155:2171-2180. [PMID: 38506596 DOI: 10.1121/10.0025382] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/20/2023] [Accepted: 02/28/2024] [Indexed: 03/21/2024]
Abstract
Nonlinear Lamb waves can propagate over long distances in plate and shell structures and are sensitive to the early fatigue damage of materials. Therefore, they offer unique advantages in the fields of nondestructive testing and material health monitoring. Plate and shell structures with discontinuous thicknesses (e.g., ribs, stiffeners, or joints) will cause nonlinear Lamb wave scattering, and it is necessary to study the scattering processes of nonlinear Lamb waves at discontinuities and how these processes impact the resulting signal characteristics. Thus, nonlinear Lamb waves can be used to identify the structural characteristics and defect characteristics of signals in practical applications. In this paper, the propagating and scattering processes of the second harmonic of a Lamb wave in a discontinuous plate are studied, including the contributions of the evanescent Lamb modes near the discontinuity and the nonlinear boundary effect at the discontinuity. The scattering characteristics of the second harmonics with respect to the frequency and geometry of the plate are analyzed. In addition, the integral formula is adjusted to improve the computational stability under different numbers of Lamb wave modes. Transient finite element simulation is used to validate the proposed method.
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Affiliation(s)
- Weiyi Zuo
- State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing, 100190, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
- BYD Auto Industry Company Limited, Shenzhen, 518118, China
| | - Zhiwu An
- State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing, 100190, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Bixing Zhang
- State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing, 100190, China
- University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Zhongtao Hu
- School of Engineering Medicine, Beihang University, Beijing 100191, China
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Zhang YL, Liu XJ, An Z. Effects of Soliton Creation on Transient Transport through a Polymer Chain. J Phys Chem B 2024; 128:1812-1817. [PMID: 38324304 DOI: 10.1021/acs.jpcb.3c08121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2024]
Abstract
By using a nonadiabatic molecular dynamics method combined with the hierarchical equations of motion, we have investigated the nonequilibrium transient transport through a conjugated polymer chain. The polymer chain is described by the Su-Schrieffer-Heeger model, and its two ends are coupled with metal electrodes of different chemical potentials. In order to present the evolutions of the electronic injection and transport in the real-time domain, we have mainly discussed the dynamic relaxation processes of the excited states and transient transport currents. It is found that due to the existence of electron-phonon couplings in the conjugated polymers, creation of solitons not only affects the time of the system achieving the steady state but also leads to periodical oscillations of the steady-state transport currents with time in our simulations. Furthermore, with increasing applied bias voltage, the steady-state transport electronic current increases, which proved that the creation of the solitons can assist the electronic transport. These results have shown that the creation of the excited states is important in understanding the transport properties in organic nanostructures.
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Affiliation(s)
- Y L Zhang
- Hebei Key Laboratory of Photoelectric Control on Surface and Interface, College of Science, Hebei University of Science and Technology, Shijiazhuang 050018, China
| | - X J Liu
- College of Physics, Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang 050024, China
| | - Z An
- College of Physics, Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang 050024, China
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Wusiman D, Guo L, Li L, Zhang X, Zhao X, An Z, Huang Z, Zhang Y, Li Z, Ying J, Wei M, Li W, An C. Clinicopathological and prognostic significance of PD-L1 and TIM-3 expression in medullary thyroid carcinoma: a retrospective immunohistochemistry study. J Endocrinol Invest 2024; 47:91-100. [PMID: 37464189 PMCID: PMC10776706 DOI: 10.1007/s40618-023-02126-z] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 05/30/2023] [Indexed: 07/20/2023]
Abstract
PURPOSE Expression of the programmed death-ligand 1 (PD-L1) and T-cell immunoglobulin and mucin-domain containing-3 (TIM-3) in medullary thyroid carcinoma (MTC) has been controversial and rarely reported. METHODS Surgical specimens of 190 MTC patients who had initial curative-intent surgery were collected. Immunohistochemistry of PD-L1 and TIM-3 was performed using 22C3 pharmDx (Dako, Carpinteria, CA) and anti-TIM-3 (1:500, ab241332, Abcam). Stained slides were scored using a combined positive score (CPS) with a cutoff of ≥ 1. We established correlations between PD-L1 expression, TIM-3 expression, clinicopathological, and survival data. RESULTS 13 cases (13/190, 6.84%) were positive for PD-L1 expression, and 42 cases (42/154, 27.27%) for TIM-3 expression. PD-L1 expression was correlated to TIM-3 expression (P = 0.002), but was not related to overall survival (OS) or progression-free survival (PFS). TIM-3 expression was correlated to perineural invasion (P = 0.040). Multivariate Cox analysis showed that lymphovascular invasion (LVI) was independently associated with OS. And tumor size, LVI, and lymph node metastases were significantly associated with PFS. Furthermore, the multivariate logistic analysis showed multifocal status, LVI, pathological T stage and lymph node metastasis were independent risk factors for biochemical recurrence/persistent disease. CONCLUSIONS We demonstrated that PD-L1 and TIM-3 expression were not frequent in MTC and were not associated with survival prognosis. Our results should be considered when clinical trials of PD-L1 or TIM-3 blockades are implemented.
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Affiliation(s)
- D Wusiman
- Department of Head and Neck Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China
| | - L Guo
- Department of Pathology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China
| | - L Li
- Department of Pathology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China
| | - X Zhang
- Department of Head and Neck Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China
| | - X Zhao
- Department of Head and Neck Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China
| | - Z An
- Department of Head and Neck Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China
| | - Z Huang
- Department of Head and Neck Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China
| | - Y Zhang
- Department of Pathology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China
| | - Z Li
- Department of Head and Neck Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China
| | - J Ying
- Department of Pathology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China
| | - M Wei
- Department of Head and Neck Surgical Oncology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Shenzhen Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 518116, Shenzhen, China.
| | - W Li
- Department of Pathology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China.
| | - C An
- Department of Head and Neck Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, 100021, Beijing, China.
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Wang X, Luo L, Wang Y, An Z. Effect of Platelet Function Testing Guidance on Clinical Outcomes for Patients with Intracranial Aneurysms Undergoing Endovascular Treatment. AJNR Am J Neuroradiol 2023; 44:928-933. [PMID: 37414457 PMCID: PMC10411848 DOI: 10.3174/ajnr.a7923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Accepted: 06/01/2023] [Indexed: 07/08/2023]
Abstract
BACKGROUND Platelet function testing has been proposed to better adjust individualized antiplatelet treatment for patients undergoing endovascular treatment for intracranial aneurysms. Its clinical significance needs to be comprehensively evaluated. PURPOSE Our aim was to evaluate the impact of platelet function testing-guided versus standard antiplatelet treatment in patients receiving endovascular treatment for intracranial aneurysms. DATA SOURCES PubMed, EMBASE, and the Cochrane Library of clinical trials were searched from inception until March 2023. STUDY SELECTION Eleven studies comprising 6199 patients were included. DATA ANALYSIS ORs with 95% CIs were calculated using random effects models. DATA SYNTHESIS The platelet function testing-guided group was associated with a decreased rate of symptomatic thromboembolic events (OR = 0.57; 95% CI, 0.42-0.76; I2 = 26%). No significant difference was found in asymptomatic thromboembolic events (OR = 1.07; 95% CI, 0.39-2.94; I2 = 48%), hemorrhagic events (OR = 0.71; 95% CI, 0.42-1.19; I2 = 34%), intracranial hemorrhagic events (OR = 0.61; 95% CI, 0.03-10.79; I2 = 62%), morbidity (OR = 0.53; 95% CI, 0.05-5.72; I2 = 86%), and mortality (OR = 1.96; 95% CI, 0.64-5.97; I2 = 0%) between the 2 groups. Subgroup analysis suggested that platelet function testing-guided therapy may contribute to fewer symptomatic thromboembolic events in patients who received stent-assisted coiling (OR = 0.43; 95% CI, 0.18-1.02; I2 = 43%) or a combination of stent-assisted and flow-diverter stent placement (OR = 0.61; 95% CI, 0.36-1.02; I2 = 0%) or who changed from clopidogrel to other thienopyridines (OR = 0.64; 95% CI, 0.40-1.02; I2 = 18%), though the difference did not reach statistical significance. LIMITATIONS Heterogeneous endovascular treatment methods and adjusted antiplatelet regimens were limitations. CONCLUSIONS Platelet function testing-guided antiplatelet strategy significantly reduced the incidence of symptomatic thromboembolic events without any increase in the hemorrhagic events for patients undergoing endovascular treatment for intracranial aneurysms.
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Affiliation(s)
- X Wang
- From the Departments of Pharmacy (X.W., Z.A.)
| | - L Luo
- Department of Pharmacy (L.L.), Beijing Huairou Hospital, Beijing, China
| | - Y Wang
- Neurosurgery (Y.W.), Beijing Chao-Yang Hospital, Capital Medical University, Beijing, China
| | - Z An
- From the Departments of Pharmacy (X.W., Z.A.)
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Wu Y, Lv K, Zheng B, Hao X, Lai W, Xia X, Yang G, Huang S, Luo Z, Yang G, Lv C, An Z, Peng W, Song T, Yuan Q. Development and validation of a clinical nomogram predicting detrusor underactivity via symptoms and noninvasive test parameters in men with benign prostatic hyperplasia. Eur Urol 2023. [DOI: 10.1016/s0302-2838(23)00080-5] [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: 02/12/2023]
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Gao B, Jiao TY, Li YT, Chen H, Lin WP, An Z, Ru LH, Zhang ZC, Tang XD, Wang XY, Zhang NT, Fang X, Xie DH, Fan YH, Ma L, Zhang X, Bai F, Wang P, Fan YX, Liu G, Huang HX, Wu Q, Zhu YB, Chai JL, Li JQ, Sun LT, Wang S, Cai JW, Li YZ, Su J, Zhang H, Li ZH, Li YJ, Li ET, Chen C, Shen YP, Lian G, Guo B, Li XY, Zhang LY, He JJ, Sheng YD, Chen YJ, Wang LH, Zhang L, Cao FQ, Nan W, Nan WK, Li GX, Song N, Cui BQ, Chen LH, Ma RG, Zhang ZC, Yan SQ, Liao JH, Wang YB, Zeng S, Nan D, Fan QW, Qi NC, Sun WL, Guo XY, Zhang P, Chen YH, Zhou Y, Zhou JF, He JR, Shang CS, Li MC, Kubono S, Liu WP, deBoer RJ, Wiescher M, Pignatari M. Deep Underground Laboratory Measurement of ^{13}C(α,n)^{16}O in the Gamow Windows of the s and i Processes. Phys Rev Lett 2022; 129:132701. [PMID: 36206440 DOI: 10.1103/physrevlett.129.132701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 04/01/2022] [Accepted: 06/01/2022] [Indexed: 06/16/2023]
Abstract
The ^{13}C(α,n)^{16}O reaction is the main neutron source for the slow-neutron-capture process in asymptotic giant branch stars and for the intermediate process. Direct measurements at astrophysical energies in above-ground laboratories are hindered by the extremely small cross sections and vast cosmic-ray-induced background. We performed the first consistent direct measurement in the range of E_{c.m.}=0.24 to 1.9 MeV using the accelerators at the China Jinping Underground Laboratory and Sichuan University. Our measurement covers almost the entire intermediate process Gamow window in which the large uncertainty of the previous experiments has been reduced from 60% down to 15%, eliminates the large systematic uncertainty in the extrapolation arising from the inconsistency of existing datasets, and provides a more reliable reaction rate for the studies of the slow-neutron-capture and intermediate processes along with the first direct determination of the alpha strength for the near-threshold state.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - R J deBoer
- Center for Nuclear Study, University of Tokyo, Wako, Saitama 351-0198, Japan
| | - M Wiescher
- Center for Nuclear Study, University of Tokyo, Wako, Saitama 351-0198, Japan
- Wolfson Fellow of Royal Society, School of Physics and Astronomy, University of Edinburgh, King's Buildings, Edinburgh EH9 3FD, United Kingdom
| | - M Pignatari
- Konkoly Observatory, Research Centre for Astronomy and Earth Sciences (CSFK), Eötvös Loránd Research Network (ELKH), Konkoly Thege Miklós út 15-17, H-1121 Budapest, Hungary
- CSFK, MTA Centre of Excellence, Budapest, Konkoly Thege Miklós út 15-17, Budapest H-1121, Hungary
- E. A. Milne Centre for Astrophysics, Department of Physics and Mathematics, University of Hull, Hull, HU6 7RX, United Kingdom
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Hu Z, An Z, Kong Y, Lian G, Wang X. Corrigendum to "The nonlinear S0 Lamb mode in a plate with a linearly-varying thickness" [Ultrasonics 94 (2019) 102-108]. Ultrasonics 2022; 124:106757. [PMID: 35527054 DOI: 10.1016/j.ultras.2022.106757] [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] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Affiliation(s)
- Zhongtao Hu
- State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhiwu An
- State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Yuanyuan Kong
- State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guoxuan Lian
- State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China
| | - Xiaomin Wang
- State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China
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Vicencio JM, Evans R, Green R, An Z, Deng J, Treacy C, Mustapha R, Monypenny J, Costoya C, Lawler K, Ng K, De-Souza K, Coban O, Gomez V, Clancy J, Chen SH, Chalk A, Wong F, Gordon P, Savage C, Gomes C, Pan T, Alfano G, Dolcetti L, Chan JNE, Flores-Borja F, Barber PR, Weitsman G, Sosnowska D, Capone E, Iacobelli S, Hochhauser D, Hartley JA, Parsons M, Arnold JN, Ameer-Beg S, Quezada SA, Yarden Y, Sala G, Ng T. Osimertinib and anti-HER3 combination therapy engages immune dependent tumor toxicity via STING activation in trans. Cell Death Dis 2022; 13:274. [PMID: 35347108 PMCID: PMC8960767 DOI: 10.1038/s41419-022-04701-3] [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] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Revised: 02/07/2022] [Accepted: 03/01/2022] [Indexed: 11/28/2022]
Abstract
Over the past decade, immunotherapy delivered novel treatments for many cancer types. However, lung cancer still leads cancer mortality, and non-small-cell lung carcinoma patients with mutant EGFR cannot benefit from checkpoint inhibitors due to toxicity, relying only on palliative chemotherapy and the third-generation tyrosine kinase inhibitor (TKI) osimertinib. This new drug extends lifespan by 9-months vs. second-generation TKIs, but unfortunately, cancers relapse due to resistance mechanisms and the lack of antitumor immune responses. Here we explored the combination of osimertinib with anti-HER3 monoclonal antibodies and observed that the immune system contributed to eliminate tumor cells in mice and co-culture experiments using bone marrow-derived macrophages and human PBMCs. Osimertinib led to apoptosis of tumors but simultaneously, it triggered inositol-requiring-enzyme (IRE1α)-dependent HER3 upregulation, increased macrophage infiltration, and activated cGAS in cancer cells to produce cGAMP (detected by a lentivirally transduced STING activity biosensor), transactivating STING in macrophages. We sought to target osimertinib-induced HER3 upregulation with monoclonal antibodies, which engaged Fc receptor-dependent tumor elimination by macrophages, and STING agonists enhanced macrophage-mediated tumor elimination further. Thus, by engaging a tumor non-autonomous mechanism involving cGAS-STING and innate immunity, the combination of osimertinib and anti-HER3 antibodies could improve the limited therapeutic and stratification options for advanced stage lung cancer patients with mutant EGFR.
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Affiliation(s)
- J M Vicencio
- Molecular Oncology Group, Cancer Institute, Paul O'Gorman Building, University College London, London, UK.
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK.
| | - R Evans
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - R Green
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - Z An
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - J Deng
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - C Treacy
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - R Mustapha
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - J Monypenny
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - C Costoya
- Cancer Immunology Unit, Cancer Institute, University College London, London, UK
| | - K Lawler
- Wellcome Trust-MRC Institute of Metabolic Science, Addenbrooke's Hospital, Cambridge, UK
| | - K Ng
- Molecular Oncology Group, Cancer Institute, Paul O'Gorman Building, University College London, London, UK
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - K De-Souza
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - O Coban
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - V Gomez
- Molecular Oncology Group, Cancer Institute, Paul O'Gorman Building, University College London, London, UK
| | - J Clancy
- Molecular Oncology Group, Cancer Institute, Paul O'Gorman Building, University College London, London, UK
| | - S H Chen
- Molecular Oncology Group, Cancer Institute, Paul O'Gorman Building, University College London, London, UK
| | - A Chalk
- Molecular Oncology Group, Cancer Institute, Paul O'Gorman Building, University College London, London, UK
| | - F Wong
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - P Gordon
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - C Savage
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - C Gomes
- Molecular Oncology Group, Cancer Institute, Paul O'Gorman Building, University College London, London, UK
| | - T Pan
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - G Alfano
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - L Dolcetti
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - J N E Chan
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - F Flores-Borja
- Centre for Immunobiology and Regenerative Medicine, Barts & The London School of Medicine and Dentistry, Queen Mary University of London, London, UK
| | - P R Barber
- Molecular Oncology Group, Cancer Institute, Paul O'Gorman Building, University College London, London, UK
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - G Weitsman
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - D Sosnowska
- School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - E Capone
- Department of Innovative Technologies in Medicine & Dentistry, University of Chieti-Pescara, Center for Advanced Studies and Technology (CAST), Chieti, Italy
| | | | - D Hochhauser
- Molecular Oncology Group, Cancer Institute, Paul O'Gorman Building, University College London, London, UK
| | - J A Hartley
- Molecular Oncology Group, Cancer Institute, Paul O'Gorman Building, University College London, London, UK
| | - M Parsons
- Randall Centre for Cell and Molecular Biophysics, King's College London, London, UK
| | - J N Arnold
- School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - S Ameer-Beg
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK
| | - S A Quezada
- Cancer Immunology Unit, Cancer Institute, University College London, London, UK
| | - Y Yarden
- Department of Biological Regulation, The Weizmann Institute of Science, Rehovot, Israel
| | - G Sala
- Department of Innovative Technologies in Medicine & Dentistry, University of Chieti-Pescara, Center for Advanced Studies and Technology (CAST), Chieti, Italy
| | - T Ng
- Molecular Oncology Group, Cancer Institute, Paul O'Gorman Building, University College London, London, UK.
- Richard Dimbleby Laboratory of Cancer Research, School of Cancer & Pharmaceutical Sciences, King's College London, London, UK.
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Liu B, Ding W, An Z, Zhu J, Zhang Z, Li L, Lin W. Tritium analysis in zirconium film with BIXS and EBS: Generality test of Al thin film as the β-ray stopping layer in BIXS. Fusion Engineering and Design 2021. [DOI: 10.1016/j.fusengdes.2021.112751] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Zeng Y, He H, Wang X, Zhang M, An Z. Climate and air pollution exposure are associated with thyroid function parameters: a retrospective cross-sectional study. J Endocrinol Invest 2021; 44:1515-1523. [PMID: 33159683 DOI: 10.1007/s40618-020-01461-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Accepted: 10/26/2020] [Indexed: 02/05/2023]
Abstract
OBJECTIVES There are still controversies about the impact of climatic and environmental factors on thyroid function parameters in healthy populations. We investigated the relationships between climate, air pollution exposure, and thyroid function fluctuations. METHODS We retrospectively reviewed 327,913 individuals attending routine health checks from December 2013 to December 2018. We analyzed the associations between thyroid function and climatic factors using Spearman's correlation analysis. We explored the relationships between thyroid function and air pollution exposure using multiple linear regression analysis, after adjusting for age, sex, season, and outdoor temperature. We also performed subgroup analyses by age and sex and sensitivity analyses of different anti-thyroid peroxidase antibody status. RESULTS Thyroid-stimulating hormone (TSH) and free triiodothyronine (FT3) were negatively associated with outdoor temperature (r = - 0.66, P < 0.001; r = - 0.55, P < 0.001), while free thyroxine (FT4) and FT4/FT3 were positively associated with temperature (r = 0.35, P < 0.001; r = 0.79, P < 0.001). An increase of 10 μg/m3 in fine particulate matter ≤ 2.5 μm (PM2.5) was associated with a decrease of 0.12 pmol/L in FT4 and an increase of 0.07 pmol/L in FT3 (both P < 0.01). FT4/FT3 was significantly negatively associated with PM2.5 (coefficient: - 0.06, P < 0.01). These results remained robust in hierarchical analyses and sensitivity analyses. CONCLUSIONS Thyroid function parameters are associated with climate and air pollution exposure. These factors may influence variations in thyroid function. Our results also highlight the importance of public health interventions to reduce air pollution.
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Affiliation(s)
- Y Zeng
- Department of Laboratory Medicine, West China Hospital, Sichuan University, No. 37, Guoxue Lane, Chengdu, China
| | - H He
- Department of Laboratory Medicine, West China Hospital, Sichuan University, No. 37, Guoxue Lane, Chengdu, China
| | - X Wang
- Department of Laboratory Medicine, West China Hospital, Sichuan University, No. 37, Guoxue Lane, Chengdu, China
| | - M Zhang
- Department of Laboratory Medicine, West China Hospital, Sichuan University, No. 37, Guoxue Lane, Chengdu, China.
| | - Z An
- Department of Endocrine and Metabolism, West China Hospital, Sichuan University, No. 37, Guoxue Lane, Chengdu, China.
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Ning XP, An Z, Qiao F, Cai CL, Han L, Song ZG, Li BL, Zhou GW, Wang J, Xu ZY, Lu FL. [Safety and efficacy of transcatheter tricuspid valve replacement with LuX-Valve in patients with severe tricuspid regurgitation]. Zhonghua Xin Xue Guan Bing Za Zhi 2021; 49:455-460. [PMID: 34034378 DOI: 10.3760/cma.j.cn112148-20210125-00091] [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: 11/05/2022]
Abstract
Objectives: To evaluate the safety and efficacy of LuX-Valve on the treatment of severe tricuspid regurgitation (TR). Methods: This is a prospective observational study. From September 2018 to March 2019, 12 patients with severe TR, who were not suitable for surgery, received LuX-Valve implantation in Changhai Hospital. LuX-Valve was implanted under general anesthesia and the guidance of transesophageal echocardiography and X-ray fluoroscopy. Access to the tricuspid valve was achieved via a minimally invasive thoracotomy and transatrial approach. Main endpoints were surgery success and device success. Surgery success was defined as successful implanting the device and withdrawing the delivery system, positioning the valve correctly and stably without severe or life-threatening adverse events. Device success was defined as satisfied valve function (TR severity reduction ≥ 2 grades, tricuspid gradient ≤ 6 mmHg (1 mmHg=0.133 kPa)), absence of malposition, valve failure and reintervention, major adverse events including device related mortality, embolization, conduction system disturbances and new onset shunt across ventricular septum at day 30 post implantation. Results: A total of 12 patients with severe to torrential TR were included in this study. The age was (68.5±6.9) years and 7 were female. All patients had typical right heart failure symptoms. Procedural success was achieved in all cases, there was no intraprocedural mortality or transfer to open surgery. TR significantly improved after LuX-Valve implantation (none/trivial in 8 patients, mild in 3 patients and moderate in 1 patient). The average device time was (9.2±4.2) minutes. Intensive care unit duration was 3.0 (2.0, 4.8) days. One patient died at postoperative day 18 due to non-surgery and device reasons. Transthoracic echocardiography at 30 days after operation showed that TR was significantly reduced (none/trivial in 8 patients, mild in 2 patients and moderate in 1 patient) and device success was achieved in 11 cases. All survived patients experienced a significant improvement in life quality with significantly improvement in New York Heart Association (NYHA) classification (Ⅰ and Ⅱ: 6/11 post operation vs. 0/11 before operation, P=0.012) and there were no device related complications in this patient cohort. Conclusions: LuX-Valve implantation is feasible, safe and effective for the treatment of patients with severe TR.
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Affiliation(s)
- X P Ning
- Department of Cardiovascular Surgery, Changhai Hospital, Naval Medical University, Shanghai 200433, China
| | - Z An
- Department of Cardiovascular Surgery, Changhai Hospital, Naval Medical University, Shanghai 200433, China
| | - F Qiao
- Department of Cardiovascular Surgery, Changhai Hospital, Naval Medical University, Shanghai 200433, China
| | - C L Cai
- Department of Cardiovascular Surgery, Changhai Hospital, Naval Medical University, Shanghai 200433, China
| | - L Han
- Department of Cardiovascular Surgery, Changhai Hospital, Naval Medical University, Shanghai 200433, China
| | - Z G Song
- Department of Cardiovascular Surgery, Changhai Hospital, Naval Medical University, Shanghai 200433, China
| | - B L Li
- Department of Cardiovascular Surgery, Changhai Hospital, Naval Medical University, Shanghai 200433, China
| | - G W Zhou
- Department of Cardiovascular Surgery, Changhai Hospital, Naval Medical University, Shanghai 200433, China
| | - J Wang
- Department of Cardiovascular Surgery, Changhai Hospital, Naval Medical University, Shanghai 200433, China
| | - Z Y Xu
- Department of Cardiovascular Surgery, Changhai Hospital, Naval Medical University, Shanghai 200433, China
| | - F L Lu
- Department of Cardiovascular Surgery, Changhai Hospital, Naval Medical University, Shanghai 200433, China
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12
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Wang X, Sun L, He N, An Z, Yu R, Li C, Li Y, Li Y, Liu X, Fang X, Zhao J. Increased expression of CXCL2 in ACPA-positive rheumatoid arthritis and its role in osteoclastogenesis. Clin Exp Immunol 2020; 203:194-208. [PMID: 33010041 DOI: 10.1111/cei.13527] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 08/29/2020] [Accepted: 09/13/2020] [Indexed: 12/16/2022] Open
Abstract
Anti-citrullinated protein/peptide antibodies (ACPA) play important roles in the pathogenesis of rheumatoid arthritis (RA). ACPA-positive (ACPA+ ) and ACPA-negative (ACPA- ) RA were suggested to be different disease subsets, with distinct differences in genetic variation and clinical outcomes. The aims of the present study were to compare gene expression profiles in ACPA+ and ACPA- RA, and to identify novel candidate gene signatures that might serve as therapeutic targets. Comprehensive transcriptome analysis of peripheral blood mononuclear cells (PBMCs) from ACPA+ and ACPA- RA patients and healthy controls was performed via RNA sequencing. A validation cohort was used to further investigate differentially expressed genes via polymerase chain reaction (PCR) and enzyme-linked immunosorbent assay (ELISA). Spearman's correlation test was used to evaluate the correlation of differentially expressed genes and the clinical and laboratory data of the patients. The role of differentially expressed genes in osteoclastogenesis was further investigated. Expression of C-X-C motif chemokine ligand 2 (CXCL2) was significantly increased in ACPA+ RA than in ACPA- RA, which was validated in PBMCs and serum. CXCL2 promoted the migration of CD14+ monocytes and increased osteoclastogenesis in RA patients. RAW264.7 macrophages were used to investigate specific mechanisms, and the results suggested that CXCL2 stimulated osteoclastogenesis via extracellular receptor kinase (ERK) mitogen-activated protein kinase (MAPK) and nuclear factor kappa B pathways. In conclusion, CXCL2 was highly expressed in ACPA+ RA than in ACPA- RA. CXCL2 promoted osteoclastogenesis and was related to bone erosion in RA, which suggests that the blockade of CXCL2 might be a novel strategy for the treatment of RA.
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Affiliation(s)
- X Wang
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing, China
| | - L Sun
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing, China
| | - N He
- Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
| | - Z An
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing, China
| | - R Yu
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing, China
| | - C Li
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing, China
| | - Y Li
- Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
| | - Y Li
- Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
| | - X Liu
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing, China
| | - X Fang
- Beijing Institute of Genomics, Chinese Academy of Sciences, Beijing, China
| | - J Zhao
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing, China
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13
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Jiang J, Riquelme M, An Z, Zhang N, Xiong W, Zhang Y, Wang C. New antibody therapeutics targeting connexin hemichannels in treatment of osteosarcoma and breast cancer bone metastasis. Eur J Cancer 2020. [DOI: 10.1016/s0959-8049(20)31221-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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14
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Li H, Pan Q, Zhang X, An Z. An Approach to Size Sub-Wavelength Surface Crack Measurements Using Rayleigh Waves Based on Laser Ultrasounds. Sensors (Basel) 2020; 20:s20185077. [PMID: 32906754 PMCID: PMC7570473 DOI: 10.3390/s20185077] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Revised: 08/30/2020] [Accepted: 09/04/2020] [Indexed: 11/19/2022]
Abstract
In this paper, the interaction of a broadband Rayleigh wave generated by a laser and an artificial rectangular notch is analyzed theoretically and experimentally. For the theoretical analysis, a Gaussian function is adopted to analyze the modulation of notch depth on the frequency spectrum via reflection and transmission coefficients. By the finite element method, the Rayleigh wave generated by pulsed laser beam irradiation and its scattering waves at cracks are calculated. A curve with a slope close to 4 fitted by crack depth and critical wavelength of the threshold phenomenon is obtained by the wavelet transform and Parseval’s theorem according to simulated and experimental results. Based on this relationship, the critical frequency at which the threshold phenomenon happens due to energy transformation of transmission/reflection Rayleigh waves is adopted to determine the size of sub-wavelength surface crack. The experimental results of artificial notch depth estimation on aluminum alloy specimens consistent with theoretical analysis validates the usefulness of the critical frequency method based on a broadband Rayleigh wave generated by laser ultrasonic.
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Affiliation(s)
- Haiyang Li
- Key Laboratory of Information Detection and Processing, North University of China, Taiyuan 030051, China
- Correspondence: ; Tel.: +86-1352-015-1406
| | - Qianghua Pan
- China Special Equipment Inspection and Research Institute, Beijing 100029, China;
| | - Xiaotong Zhang
- Key Laboratory of Advanced Manufacturing Technology, North University of China, Taiyuan 030051, China;
| | - Zhiwu An
- Institute of Acoustics of the Chinese Academy of Sciences, Beijing 100190, China;
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15
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Xu F, Yu L, Peng X, Zhang J, Li S, Liu S, Yin Y, An Z, Wang F, Fu Y, Xu P. Unambiguous Phosphosite Localization through the Combination of Trypsin and LysargiNase Mirror Spectra in a Large-Scale Phosphoproteome Study. J Proteome Res 2020; 19:2185-2194. [PMID: 32388983 DOI: 10.1021/acs.jproteome.9b00562] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Understanding of the kinase-guided signaling pathways requires the identification and analysis of phosphosites. Mass spectrometry (MS)-based phosphoproteomics is a rapid and highly sensitive approach for high-throughput identification of phosphosites. However, phosphosite determination from MS data with a single protease is more likely to be ambiguous, regardless of the strategy used for phosphopeptide detection. Here, we explored the application of LysargiNase, which was recently reported to mirror trypsin in specificity to cleave arginine and lysine residues exclusively at the N-terminal side. We found that the combination of trypsin and LysargiNase mirror spectra resulted in higher ion coverage in MS2 spectra. The median ion coverage values of b ions in tryptic spectra, LysargiNase spectra, and combined spectra are 8.3, 20.5, and 25.0%, respectively. As for the median ion coverage of y ions, these values are 27.8, 10.0, and 32.3%. Higher ion coverage was helpful to pinpoint the precise phosphosites. Compared to trypsin alone, the combined use of trypsin and LysargiNase mirror spectra enabled 67.1% of mirror spectra with unreliable scores (confidence score <0.75) to become reliable (confidence score ≥ 0.75). Meanwhile, all of the mirror peptide-spectrum matches (PSMs) with multiple potential phosphosites from trypsin and LysargiNase digests could be assigned one precise phosphosite after applying the combination strategy. Besides, the combination strategy could identify more novel phosphosites than the union strategy did. We synthesized three phosphopeptides corresponding to the three novel phosphosites and validated the reliability of the identification. Taken together, our data demonstrated the distinctive potential of the combination strategy presented here for unambiguous phosphosite localization (Project accession PXD011178).
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Affiliation(s)
- Feng Xu
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences Beijing, Beijing Institute of Lifeomics, Beijing 102206, China
| | - Li Yu
- National Center for Mathematics and Interdisciplinary Sciences, Key Laboratory of Random Complex Structures and Data Science, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100864, China.,School of Mathematical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xuehui Peng
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences Beijing, Beijing Institute of Lifeomics, Beijing 102206, China.,Key Laboratory of Combinatorial Biosynthesis and Drug Discovery of Ministry of Education, School of Pharmaceutical Sciences, School of Medicine, Wuhan University, Wuhan430072, China
| | - Junling Zhang
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences Beijing, Beijing Institute of Lifeomics, Beijing 102206, China
| | - Suzhen Li
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences Beijing, Beijing Institute of Lifeomics, Beijing 102206, China.,Anhui Medical University, Hefei 230032, China
| | - Shu Liu
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences Beijing, Beijing Institute of Lifeomics, Beijing 102206, China
| | - Yanan Yin
- Key Laboratory of Combinatorial Biosynthesis and Drug Discovery of Ministry of Education, School of Pharmaceutical Sciences, School of Medicine, Wuhan University, Wuhan430072, China
| | - Zhiwu An
- National Center for Mathematics and Interdisciplinary Sciences, Key Laboratory of Random Complex Structures and Data Science, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100864, China.,School of Mathematical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Fuqiang Wang
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences Beijing, Beijing Institute of Lifeomics, Beijing 102206, China
| | - Yan Fu
- National Center for Mathematics and Interdisciplinary Sciences, Key Laboratory of Random Complex Structures and Data Science, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100864, China.,School of Mathematical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ping Xu
- State Key Laboratory of Proteomics, Beijing Proteome Research Center, National Center for Protein Sciences Beijing, Beijing Institute of Lifeomics, Beijing 102206, China.,Anhui Medical University, Hefei 230032, China.,Key Laboratory of Combinatorial Biosynthesis and Drug Discovery of Ministry of Education, School of Pharmaceutical Sciences, School of Medicine, Wuhan University, Wuhan430072, China
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16
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Shu Q, Li M, Shu L, An Z, Wang J, Lv H, Yang M, Cai T, Hu T, Fu Y, Yang F. Large-scale Identification of N-linked Intact Glycopeptides in Human Serum using HILIC Enrichment and Spectral Library Search. Mol Cell Proteomics 2020; 19:672-689. [PMID: 32102970 PMCID: PMC7124471 DOI: 10.1074/mcp.ra119.001791] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Revised: 02/10/2020] [Indexed: 11/12/2022] Open
Abstract
Large-scale identification of N-linked intact glycopeptides by liquid chromatography coupled with tandem mass spectrometry (LC-MS/MS) in human serum is challenging because of the wide dynamic range of serum protein abundances, the lack of a complete serum N-glycan database and the existence of proteoforms. In this regard, a spectral library search method was presented for the identification of N-linked intact glycopeptides from N-linked glycoproteins in human serum with target-decoy and motif-specific false discovery rate (FDR) control. Serum proteins were firstly separated into low-abundance and high-abundance proteins by acetonitrile (ACN) precipitation. After digestion, the N-linked intact glycopeptides were enriched by hydrophilic interaction liquid chromatography (HILIC) and a portion of the enriched N-linked intact glycopeptides were processed by Peptide-N-Glycosidase F (PNGase F) to generate N-linked deglycopeptides. Both N-linked intact glycopeptides and deglycopeptides were analyzed by LC-MS/MS. From N-linked deglycopeptides data sets, 764 N-linked glycoproteins, 1699 N-linked glycosites and 3328 unique N-linked deglycopeptides were identified. Four types of N-linked glycosylation motifs (NXS/T/C/V, X≠P) were used to recognize the N-linked deglycopeptides. The spectra of these N-linked deglycopeptides were utilized for N-linked deglycopeptides library construction and identification of N-linked intact glycopeptides. A database containing 739 N-glycan masses was constructed and utilized during spectral library search for the identification of N-linked intact glycopeptides. In total, 526 N-linked glycoproteins, 1036 N-linked glycosites, 22,677 N-linked intact glycopeptides and 738 N-glycan masses were identified under 1% FDR, representing the most in-depth serum N-glycoproteome identified by LC-MS/MS at N-linked intact glycopeptide level.
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Affiliation(s)
- Qingbo Shu
- Laboratory of Protein and Peptide Pharmaceuticals & Proteomics Laboratory, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China; National Center for Mathematics and Interdisciplinary Sciences, Key Laboratory of Random Complex Structures and Data Science, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100190, China; Center for Cellular and Molecular Diagnostics, Department of Biochemistry and Molecular Biology, School of Medicine, Tulane University, New Orleans, Louisiana 70112
| | - Mengjie Li
- Computer Network Information Center, Chinese Academy of Sciences, Beijing 100101, China; Center for Cellular and Molecular Diagnostics, Department of Biochemistry and Molecular Biology, School of Medicine, Tulane University, New Orleans, Louisiana 70112
| | - Lian Shu
- Laboratory of Protein and Peptide Pharmaceuticals & Proteomics Laboratory, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China; Center for Cellular and Molecular Diagnostics, Department of Biochemistry and Molecular Biology, School of Medicine, Tulane University, New Orleans, Louisiana 70112; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhiwu An
- Computer Network Information Center, Chinese Academy of Sciences, Beijing 100101, China; Center for Cellular and Molecular Diagnostics, Department of Biochemistry and Molecular Biology, School of Medicine, Tulane University, New Orleans, Louisiana 70112
| | - Jifeng Wang
- Laboratory of Protein and Peptide Pharmaceuticals & Proteomics Laboratory, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China
| | - Hao Lv
- Computer Network Information Center, Chinese Academy of Sciences, Beijing 100101, China; Center for Cellular and Molecular Diagnostics, Department of Biochemistry and Molecular Biology, School of Medicine, Tulane University, New Orleans, Louisiana 70112; Research Center for Basic Sciences of Medicine, Basic Medical College, Guizhou Medical University, Guiyang 550025, China
| | - Ming Yang
- Laboratory of Protein and Peptide Pharmaceuticals & Proteomics Laboratory, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China; Center for Cellular and Molecular Diagnostics, Department of Biochemistry and Molecular Biology, School of Medicine, Tulane University, New Orleans, Louisiana 70112
| | - Tanxi Cai
- Laboratory of Protein and Peptide Pharmaceuticals & Proteomics Laboratory, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China; Center for Cellular and Molecular Diagnostics, Department of Biochemistry and Molecular Biology, School of Medicine, Tulane University, New Orleans, Louisiana 70112
| | - Tony Hu
- National Center for Mathematics and Interdisciplinary Sciences, Key Laboratory of Random Complex Structures and Data Science, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100190, China
| | - Yan Fu
- Computer Network Information Center, Chinese Academy of Sciences, Beijing 100101, China; Center for Cellular and Molecular Diagnostics, Department of Biochemistry and Molecular Biology, School of Medicine, Tulane University, New Orleans, Louisiana 70112.
| | - Fuquan Yang
- Laboratory of Protein and Peptide Pharmaceuticals & Proteomics Laboratory, Institute of Biophysics, Chinese Academy of Sciences, Beijing 100101, China; University of Chinese Academy of Sciences, Beijing 100049, China.
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17
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Chen J, Liu X, Fu S, An Z, Feng Y, Wang R, Ji P. Effects of sophorolipids on fungal and oomycete pathogens in relation to pH solubility. J Appl Microbiol 2020; 128:1754-1763. [PMID: 31995843 DOI: 10.1111/jam.14594] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 12/30/2019] [Accepted: 01/17/2020] [Indexed: 11/28/2022]
Abstract
AIMS The objective of this study was to determine the effects of sophorolipids on several fungal and oomycete plant pathogens and the relationship between sophorolipids at different pH and antimicrobial activities. METHODS AND RESULTS Sophorolipids had different solubility at different pH with a dramatic increase in solubility when pH was 6 or higher. Inhibition of mycelial growth of Phytophthora infestans by sophorolipids was affected by pH values, showing that when the pH value was higher, the inhibition rate was lower. Sophorolipids inhibited spore germination and mycelial growth of several fungal and oomycete pathogens in vitro including Fusarium sp., F. oxysporum, F. concentricum, Pythium ultimum, Pyricularia oryzae, Rhizoctorzia solani, Alternaria kikuchiana, Gaeumannomyces graminis var. tritici and P. infestans and caused morphological changes in hyphae by microscope observation. Sophorolipids reduced β-1,3-glucanase activity in mycelia of P. infestans. In greenhouse studies, foliar application of sophorolipids at 3 mg ml-1 reduced severity of late blight of potato caused by P. infestans significantly. CONCLUSION Sophorolipids influenced spore germination and hyphal tip growth of several plant pathogens and pH solubility of sophorolipids had an effect on their efficacy. Application of sophorolipids reduced late blight disease on potato under greenhouse conditions. SIGNIFICANCE AND IMPACT OF THE STUDY The findings indicated that sophorolipids have the potential to be developed as a convenient and easy-to-use formulation for managing plant diseases.
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Affiliation(s)
- J Chen
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.,Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.,Department of Plant Pathology, University of Georgia, Tifton, GA, USA
| | - X Liu
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.,Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China
| | - S Fu
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.,Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China
| | - Z An
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.,Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China
| | - Y Feng
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.,Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China
| | - R Wang
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.,Shandong Provincial Key Lab of Microbial Engineering, Department of Bioengineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China
| | - P Ji
- Department of Plant Pathology, University of Georgia, Tifton, GA, USA
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18
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Park W, An Z. Radiobiological Difference Between Flattening Filter Free (FFF) Vs. Flattening Filter (FF) X-Ray Beams in Lung Cancer Cells. Int J Radiat Oncol Biol Phys 2019. [DOI: 10.1016/j.ijrobp.2019.06.1101] [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: 11/26/2022]
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19
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Chen Y, Song XT, Yao YM, Huang L, An Z, Yuan J, Xiong B, Liu YH, Zhang YQ. [Mortality and influencing factors on injecting drug users with HIV/AIDS in Guizhou province, 1996-2015]. Zhonghua Liu Xing Bing Xue Za Zhi 2019; 40:765-769. [PMID: 31357795 DOI: 10.3760/cma.j.issn.0254-6450.2019.07.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To understand the mortality and influencing factors on injecting drug users (IDUs) with HIV/AIDS, in Guizhou province, 1996-2015. Methods: A retrospective cohort study was conducted on IDUs with HIV/AIDS that were reported through national comprehensive HIV/AIDS information system, in Guizhou province during 1996-2015. Cox proportional hazard regression model was used to analyze the influencing factors on the mortality of HIV/AIDS. Results: A total of 3 958 cases of IDUs with HIV/AIDS were recruited in this study, with all-cause mortality rate of 44.01% (1 742/3 958) and total mortality rate of 7.80/100 person-years, respectively. The median survival time between diagnosis and death was 8.08 years. Mortality rate was 3.57/100 person-years in the group receiving antiretroviral therapy (ART). The mortality appeared to be 4.08/100 person-years in the group who were on methadone maintenance treatment (MMT). Data from the multiple regression analysis indicated that factors of gender, ethnicity, age when HIV/AIDS diagnosis was made, CD(4)(+)T lymphocyte (CD(4)) count at the first testing, ART and MMT were significantly associated with deaths among these people. The risk of death in females was 0.82 times (95%CI: 0.69-0.98) higher than that in males. The risk of deaths among the ethnic minority subjects was 1.39 times (95%CI: 1.21-1.60) higher than that of the Hans. The risk of death appeared to be 2.44 times higher (95%CI: 1.07-5.56) in the over-50-year of age group than in the <20 year-old group, when HIV/AIDS was diagnosed for the first time. The risk of death in CD(4) ≥500/μl group in the first time was 0.27 times (95%CI: 0.22-0.32) more than CD(4) <200/μl group in the firs time. The risk of death in cases who were treated with ART or MMT was 2.83 times (95%CI: 2.45-3.26) and 1.35 times (95%CI: 1.15-1.59) higher than those who did not receive any treatment, respectively. Conclusion: Higher risks on death seemed to be related to the following factors: being male, older age at the time of diagnosis, lower CD(4) at diagnosis, not on ART or MMT among the IDUs with HIV/AIDS in Guizhou province, between 1996-2015.
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Affiliation(s)
- Y Chen
- Guizhou Provincial Center for Disease Control and Prevention, Guiyang 550001, China
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20
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Hu Z, An Z, Kong Y, Lian G, Wang X. The nonlinear S 0 Lamb mode in a plate with a linearly-varying thickness. Ultrasonics 2019; 94:102-108. [PMID: 30563710 DOI: 10.1016/j.ultras.2018.11.013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2018] [Revised: 11/20/2018] [Accepted: 11/29/2018] [Indexed: 06/09/2023]
Abstract
The aim of this paper is to investigate propagation characteristics and the generation mechanism of the nonlinear lowest-order symmetric Lamb mode (S0) which propagates downslope in free elastic plates with slowly linearly varying-thickness. From theoretical analyses, in a low frequency-thickness product (fd) range, the S0 mode is slightly dispersive, it is easy to generate, and it approximately satisfies the principle of the phase velocity matching. Therefore, if a S0 mode is excited at a proper frequency in the low fd range, the amplitude of the second harmonic wave is linearly increasing in a certain propagating-distance, which is valuable for the practical NDE application of the second harmonic wave. Moreover, numerical simulations and experiments have been carried out to validate theoretical results. Our investigation of properties of the second harmonic wave can be applied to characterize and evaluate micro-structural damages in varying-thickness waveguides.
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Affiliation(s)
- Zhongtao Hu
- State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhiwu An
- State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Yuanyuan Kong
- State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Guoxuan Lian
- State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China
| | - Xiaomin Wang
- State Key Laboratory of Acoustics, Institute of Acoustics, Chinese Academy of Sciences, Beijing 100190, China; University of Chinese Academy of Sciences, Beijing 100049, China
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An Z, Zhai L, Ying W, Qian X, Gong F, Tan M, Fu Y. PTMiner: Localization and Quality Control of Protein Modifications Detected in an Open Search and Its Application to Comprehensive Post-translational Modification Characterization in Human Proteome. Mol Cell Proteomics 2019; 18:391-405. [PMID: 30420486 PMCID: PMC6356076 DOI: 10.1074/mcp.ra118.000812] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2018] [Revised: 11/02/2018] [Indexed: 12/27/2022] Open
Abstract
The open (mass tolerant) search of tandem mass spectra of peptides shows great potential in the comprehensive detection of post-translational modifications (PTMs) in shotgun proteomics. However, this search strategy has not been widely used by the community, and one bottleneck of it is the lack of appropriate algorithms for automated and reliable post-processing of the coarse and error-prone search results. Here we present PTMiner, a software tool for confident filtering and localization of modifications (mass shifts) detected in an open search. After mass-shift-grouped false discovery rate (FDR) control of peptide-spectrum matches (PSMs), PTMiner uses an empirical Bayesian method to localize modifications through iterative learning of the prior probabilities of each type of modification occurring on different amino acids. The performance of PTMiner was evaluated on three data sets, including simulated data, chemically synthesized peptide library data and modified-peptide spiked-in proteome data. The results showed that PTMiner can effectively control the PSM FDR and accurately localize the modification sites. At 1% real false localization rate (FLR), PTMiner localized 93%, 84 and 83% of the modification sites in the three data sets, respectively, far higher than two open search engines we used and an extended version of the Ascore localization algorithm. We then used PTMiner to analyze a draft map of human proteome containing 25 million spectra from 30 tissues, and confidently identified over 1.7 million modified PSMs at 1% FDR and 1% FLR, which provided a system-wide view of both known and unknown PTMs in the human proteome.
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Affiliation(s)
- Zhiwu An
- National Center for Mathematics and Interdisciplinary Sciences, Key Laboratory of Random Complex Structures and Data Science, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100190, China;; School of Mathematical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Linhui Zhai
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China
| | - Wantao Ying
- State key Laboratory of Proteomics, National Center for Protein Sciences Beijing, Beijing Proteome Research Center, National Engineering Research Center for Protein Drugs, Beijing 102206, China, Beijing Institute of Lifeomics, Beijing 100850, China
| | - Xiaohong Qian
- State key Laboratory of Proteomics, National Center for Protein Sciences Beijing, Beijing Proteome Research Center, National Engineering Research Center for Protein Drugs, Beijing 102206, China, Beijing Institute of Lifeomics, Beijing 100850, China
| | - Fuzhou Gong
- National Center for Mathematics and Interdisciplinary Sciences, Key Laboratory of Random Complex Structures and Data Science, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100190, China;; School of Mathematical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Minjia Tan
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China;.
| | - Yan Fu
- National Center for Mathematics and Interdisciplinary Sciences, Key Laboratory of Random Complex Structures and Data Science, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100190, China;; School of Mathematical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China.
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An Z, Gao J, Wang J. A New Heterometallic Pb(II)–Ca(II) Coordination Polymer with 2D Pb–O–Ca Inorganic Connectivity. RUSS J COORD CHEM+ 2019. [DOI: 10.1134/s1070328418120011] [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: 11/22/2022]
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Yi X, Wang B, An Z, Gong F, Li J, Fu Y. Quality control of single amino acid variations detected by tandem mass spectrometry. J Proteomics 2018; 187:144-151. [PMID: 30012419 DOI: 10.1016/j.jprot.2018.07.004] [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: 03/07/2018] [Revised: 06/26/2018] [Accepted: 07/02/2018] [Indexed: 02/04/2023]
Abstract
Study of single amino acid variations (SAVs) of proteins, resulting from single nucleotide polymorphisms, is of great importance for understanding the relationships between genotype and phenotype. In mass spectrometry based shotgun proteomics, identification of peptides with SAVs often suffers from high error rates on the variant sites detected. These site errors are due to multiple reasons and can be confirmed by manual inspection or genomic sequencing. Here, we present a software tool, named SAVControl, for site-level quality control of variant peptide identifications. It mainly includes strict false discovery rate control of variant peptide identifications and variant site verification by unrestrictive mass shift relocalization. SAVControl was validated on three colorectal adenocarcinoma cell line datasets with genomic sequencing evidences and tested on a colorectal cancer dataset from The Cancer Genome Atlas. The results show that SAVControl can effectively remove false detections of SAVs. SIGNIFICANCE Protein sequence variations caused by single nucleotide polymorphisms (SNPs) are single amino acid variations (SAVs). The investigation of SAVs may provide a chance for understanding the relationships between genotype and phenotype. Mass spectrometry (MS) based proteomics provides a large-scale way to detect SAVs. However, using the current analysis strategy to detect SAVs may lead to high rate of false positives. The SAVControl we present here is a computational workflow and software tool for site-level quality control of SAVs detected by MS. It accesses the confidence of detected variant sites by relocating the mass shift responsible for an SAV to search for alternative interpretations. In addition, it uses a strict false discovery rate control method for variant peptide identifications. The advantages of SAVControl were demonstrated on three colorectal adenocarcinoma cell line datasets and a colorectal cancer dataset. We believe that SAVControl will be a powerful tool for computational proteomics and proteogenomics.
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Affiliation(s)
- Xinpei Yi
- NCMIS, RCSDS, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100190, China; School of Mathematical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Bo Wang
- Department of Bioinformatics and Biostatistics, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Zhiwu An
- NCMIS, RCSDS, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100190, China; School of Mathematical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
| | - Fuzhou Gong
- NCMIS, RCSDS, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100190, China; School of Mathematical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Jing Li
- Department of Bioinformatics and Biostatistics, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai 200240, China.
| | - Yan Fu
- NCMIS, RCSDS, Academy of Mathematics and Systems Science, Chinese Academy of Sciences, Beijing 100190, China; School of Mathematical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China.
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Xun-Ping W, An Z. [Study of spatial stratified sampling strategy of Oncomelania hupensis snail survey based on plant abundance]. Zhongguo Xue Xi Chong Bing Fang Zhi Za Zhi 2017; 29:420-425. [PMID: 29508572 DOI: 10.16250/j.32.1374.2017036] [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] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Objective To optimize and simplify the survey method of Oncomelania hupensis snails in marshland endemic regions of schistosomiasis, so as to improve the precision, efficiency and economy of the snail survey. Methods A snail sampling strategy (Spatial Sampling Scenario of Oncomelania based on Plant Abundance, SOPA) which took the plant abundance as auxiliary variable was explored and an experimental study in a 50 m×50 m plot in a marshland in the Poyang Lake region was performed. Firstly, the push broom surveyed data was stratified into 5 layers by the plant abundance data; then, the required numbers of optimal sampling points of each layer through Hammond McCullagh equation were calculated; thirdly, every sample point in the line with the Multiple Directional Interpolation (MDI) placement scheme was pinpointed; and finally, the comparison study among the outcomes of the spatial random sampling strategy, the traditional systematic sampling method, the spatial stratified sampling method, Sandwich spatial sampling and inference and SOPA was performed. Results The method (SOPA) proposed in this study had the minimal absolute error of 0.213 8; and the traditional systematic sampling method had the largest estimate, and the absolute error was 0.924 4. Conclusion The snail sampling strategy (SOPA) proposed in this study obtains the higher estimation accuracy than the other four methods.
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Affiliation(s)
- W Xun-Ping
- School of Geography and Environmental Sciences, Jiangxi Normal University, Jiangxi Province, Nanchang 330022, China
| | - Z An
- School of Geography and Environmental Sciences, Jiangxi Normal University, Jiangxi Province, Nanchang 330022, China; Key Laboratory of Poyang Lake Wetland and Watershed Research, Ministry of Education, Jiangxi Normal University, China
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Zhao J, An Z, Zhu J, Tan W, Liu M. Measurements of Lα, Lβ, Lγ and M X-ray production cross sections of Os, Ir and Pt by low-energy electron impact: Comparisons of experiment with theory. Radiat Phys Chem Oxf Engl 1993 2017. [DOI: 10.1016/j.radphyschem.2017.01.039] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Yang WP, Wu HY, Zhang W, Chen GS, Chen WJ, Li H, Song JM, An HB, Xu JL, Zhao WY, Wang YZ, Cui LY, An Z, Tao J, He LJ. [Consensus on pathologic diagnosis of Wilms' tumor in children]. Zhonghua Bing Li Xue Za Zhi 2017; 46:149-154. [PMID: 28297753 DOI: 10.3760/cma.j.issn.0529-5807.2017.03.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Li C, Hardisty DS, Luo G, Huang J, Algeo TJ, Cheng M, Shi W, An Z, Tong J, Xie S, Jiao N, Lyons TW. Uncovering the spatial heterogeneity of Ediacaran carbon cycling. Geobiology 2017; 15:211-224. [PMID: 27997754 DOI: 10.1111/gbi.12222] [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] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Accepted: 12/02/2016] [Indexed: 05/15/2023]
Abstract
Records of the Ediacaran carbon cycle (635-541 million years ago) include the Shuram excursion (SE), the largest negative carbonate carbon isotope excursion in Earth history (down to -12‰). The nature of this excursion remains enigmatic given the difficulties of interpreting a perceived extreme global decrease in the δ13 C of seawater dissolved inorganic carbon. Here, we present carbonate and organic carbon isotope (δ13 Ccarb and δ13 Corg ) records from the Ediacaran Doushantuo Formation along a proximal-to-distal transect across the Yangtze Platform of South China as a test of the spatial variation of the SE. Contrary to expectations, our results show that the magnitude and morphology of this excursion and its relationship with coexisting δ13 Corg are highly heterogeneous across the platform. Integrated geochemical, mineralogical, petrographic, and stratigraphic evidence indicates that the SE is a primary marine signature. Data compilations demonstrate that the SE was also accompanied globally by parallel negative shifts of δ34 S of carbonate-associated sulfate (CAS) and increased 87 Sr/86 Sr ratio and coastal CAS concentration, suggesting elevated continental weathering and coastal marine sulfate concentration during the SE. In light of these observations, we propose a heterogeneous oxidation model to explain the high spatial heterogeneity of the SE and coexisting δ13 Corg records of the Doushantuo, with likely relevance to the SE in other regions. In this model, we infer continued marine redox stratification through the SE but with increased availability of oxidants (e.g., O2 and sulfate) limited to marginal near-surface marine environments. Oxidation of limited spatiotemporal extent provides a mechanism to drive heterogeneous oxidation of subsurface reduced carbon mostly in shelf areas. Regardless of the mechanism driving the SE, future models must consider the evidence for spatial heterogeneity in δ13 C presented in this study.
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Affiliation(s)
- C Li
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, China
| | - D S Hardisty
- Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA, USA
- Department of Earth Sciences, University of California, Riverside, CA, USA
| | - G Luo
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, China
| | - J Huang
- State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan, China
| | - T J Algeo
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, China
- State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Wuhan, China
- Department of Geology, University of Cincinnati, Cincinnati, OH, USA
| | - M Cheng
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, China
| | - W Shi
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, China
| | - Z An
- Faculty of Earth Sciences, China University of Geosciences, Wuhan, China
| | - J Tong
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, China
| | - S Xie
- State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, China
| | - N Jiao
- State Key Laboratory of Marine Environmental Sciences, Xiamen University, Xiamen, China
| | - T W Lyons
- Department of Earth Sciences, University of California, Riverside, CA, USA
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Sun L, An Z, Li CH, Liu R, Zhao JX, Liu XY. [Role of galectin-1 in regulation of umbilical cord mesenchymal stem cells on T cells of rheumatoid arthritis]. Beijing Da Xue Xue Bao Yi Xue Ban 2016; 48:964-969. [PMID: 27987498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
OBJECTIVE The therapeutic potential of umbilical cord mesenchymal stem cells (UC-MSCs) in rheumatoid arthritis (RA) has attracted more and more attention, because of it can suppress the various inflammatory effects of T cells. Galectin-1 is highly expressed in UC-MSCs, as the first lectin mediating the immunomodulatory effect of MSCs. Our study will investigate the effects of galectin-1 in regulation of UC-MSCs on rheumatoid arthritis T cells. METHODS Lentivirus transfected shRNA technique was used to knock down the expression of galectin-1 in UC-MSCs to construct UC-MSCs(Gal-1-). The effects of UC-MSCs and UC-MSCs(Gal-1-) on CD4+ T cells in RA patients were investigated by contact system, including negative control group (CD4+ T cells), positive control group [CD4+ T-phytohemagg lutinin (PHA)], UC-MSCs-CD4+ T cells co-culture group, UC-MSCs(control shRNA)-CD4+ T cells co-culture group, and UC-MSCs(Gal-1-)-CD4+ T cells co-culture group. The proliferation of CD4+ T cells was detected by MTS assay. The level of tumor necrosis factors α (TNF-α) in cells supernatant was detected by enzyme linked immunosorbent assay (ELISA). The effect of UC-MSCs on helper T cell (Th) subset was detected by flow cytometry. RESULTS In vitro, UC-MSCs were capable of inhibiting PHA induced proliferation of CD4+ T cells from RA patients, but UC-MSCs(Gal-1-) did not show the significant inhibitory effect. Galectin-1 affect the TNF-α level of CD4+ T cells regulated by UC-MSCs. UC-MSCs and UC-MSCs(control shRNA) significantly inhibited the expression of TNF-α in PHA-induced CD4+ T cells. However, UC-MSCs(Gal-1-) had no significant inhibitory effect. Furthermore, the Th1 cells were also significantly suppressed by UC-MSCs and UC-MSCs(control shRNA) (4.83%±1.37% and 5.13%±0.87%,P=0.012 and P=0.018). These was no significant difference in the proportion of the Th1 cells between the control group and UC-MSCs(Gal-1-) group (8.51%±2.04% and 6.41%±0.96%,P=0.101). The Th2 cells were protected after silence galectin-1 in UC-MSCs, whereas there was no significant difference. The proportion of Th17 was decreased by co-culture with UC-MSCs and UC-MSCs (control shRNA), but these was also no significant difference. CONCLUSION UC-MSCs can inhibit the proliferation and differentiation of CD4+ T cells from RA patients, but these effect declined after knocking down the expression of galectin-1. Galectin-1 maybe take part in the regulation of UC-MSCs on rheumatoid arthritis CD4+ T cells.
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Affiliation(s)
- L Sun
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing 100191, China
| | - Z An
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing 100191, China
| | - C H Li
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing 100191, China
| | - R Liu
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing 100191, China
| | - J X Zhao
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing 100191, China
| | - X Y Liu
- Department of Rheumatology and Immunology, Peking University Third Hospital, Beijing 100191, China
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Lü Q, Zhang Y, Song C, An Z, Wei S, Huang J, Huang L, Tang L, Tong N. A novel SLC12A3 gene homozygous mutation of Gitelman syndrome in an Asian pedigree and literature review. J Endocrinol Invest 2016; 39:333-40. [PMID: 26260218 DOI: 10.1007/s40618-015-0371-y] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/16/2015] [Accepted: 07/24/2015] [Indexed: 02/06/2023]
Abstract
OBJECTIVES Gitelman syndrome (GS) is an autosomal recessive disease characterized by hypokalemic metabolic alkalosis in combination with significant hypomagnesemia and hypocalciuria which is caused by mutations in the SLC12A3 gene. In this study, we reported a case of GS pedigree and reviewed pertinent literature so as to explore the relationship between clinical characteristics and genotype meanwhile provide recommendations for the diagnosis and treatment of GS. DESIGN AND METHODS This is a pedigree-based genetic study of GS and 11 members from one family were included. We summarized their clinical features, analyzed laboratory parameters related to GS and SLC12A3 gene. RESULTS The proband experienced intermittent severe symptoms of weakness accompanied by significant hypokalemia, hypomagnesemia and hypocalciuria in laboratory test with poor treatments. His mother had more slight symptoms of weakness than him with mild hypokalemia and hypocalciuria. Mild hypomagnesemia was also observed in his sister with occasional weakness. All other pedigree members had normal laboratory test with no GS-related symptoms. A homozygous mutation of SLC12A3 gene (c.488C > T) was detected by genetic testing in three members, and six were carriers of this mutation. CONCLUSIONS Genotype and phenotype vary significantly among GS patients. Male patients tend to experience more severe symptoms and poor treatment effect. Further large-scale population, animal, and molecular biology experiments are required to investigate the complexity of GS and to find a better treatment regimen for this disease.
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Affiliation(s)
- Q Lü
- Department of Endocrinology and Metabolism, West China Hospital of Sichuan University, No. 37 Guoxue Lane, Chengdu, 610041, China
| | - Y Zhang
- Department of Endocrinology and Metabolism, West China Hospital of Sichuan University, No. 37 Guoxue Lane, Chengdu, 610041, China
| | - C Song
- West China School of Medicine, Sichuan University, No.17, the 3rd section of the south of Renmin road, Chengdu, 610041, China
| | - Z An
- Department of Endocrinology and Metabolism, West China Hospital of Sichuan University, No. 37 Guoxue Lane, Chengdu, 610041, China
| | - S Wei
- West China School of Medicine, Sichuan University, No.17, the 3rd section of the south of Renmin road, Chengdu, 610041, China
| | - J Huang
- West China School of Medicine, Sichuan University, No.17, the 3rd section of the south of Renmin road, Chengdu, 610041, China
| | - L Huang
- Department of Endocrinology and Metabolism, West China Hospital of Sichuan University, No. 37 Guoxue Lane, Chengdu, 610041, China
| | - L Tang
- Department of Endocrinology and Metabolism, West China Hospital of Sichuan University, No. 37 Guoxue Lane, Chengdu, 610041, China
| | - N Tong
- Department of Endocrinology and Metabolism, West China Hospital of Sichuan University, No. 37 Guoxue Lane, Chengdu, 610041, China.
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Zhao J, Tian L, Li X, An Z, Zhu J, Liu M. Measurements of L shell X-ray yields of thick Ag target by 6–29keV electron impact. Radiat Phys Chem Oxf Engl 1993 2015. [DOI: 10.1016/j.radphyschem.2014.09.009] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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An Z, Tang Z, Ma B, Mason AS, Guo Y, Yin J, Gao C, Wei L, Li J, Fu D. Transposon variation by order during allopolyploidisation between Brassica oleracea and Brassica rapa. Plant Biol (Stuttg) 2014; 16:825-35. [PMID: 24176077 DOI: 10.1111/plb.12121] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Accepted: 09/23/2013] [Indexed: 05/02/2023]
Abstract
Although many studies have shown that transposable element (TE) activation is induced by hybridisation and polyploidisation in plants, much less is known on how different types of TE respond to hybridisation, and the impact of TE-associated sequences on gene function. We investigated the frequency and regularity of putative transposon activation for different types of TE, and determined the impact of TE-associated sequence variation on the genome during allopolyploidisation. We designed different types of TE primers and adopted the Inter-Retrotransposon Amplified Polymorphism (IRAP) method to detect variation in TE-associated sequences during the process of allopolyploidisation between Brassica rapa (AA) and Brassica oleracea (CC), and in successive generations of self-pollinated progeny. In addition, fragments with TE insertions were used to perform Blast2GO analysis to characterise the putative functions of the fragments with TE insertions. Ninety-two primers amplifying 548 loci were used to detect variation in sequences associated with four different orders of TE sequences. TEs could be classed in ascending frequency into LTR-REs, TIRs, LINEs, SINEs and unknown TEs. The frequency of novel variation (putative activation) detected for the four orders of TEs was highest from the F1 to F2 generations, and lowest from the F2 to F3 generations. Functional annotation of sequences with TE insertions showed that genes with TE insertions were mainly involved in metabolic processes and binding, and preferentially functioned in organelles. TE variation in our study severely disturbed the genetic compositions of the different generations, resulting in inconsistencies in genetic clustering. Different types of TE showed different patterns of variation during the process of allopolyploidisation.
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Affiliation(s)
- Z An
- Engineering Research Center of South Upland Agriculture of Ministry of Education, College of Agronomy and Biotechnology, Southwest University, Chongqing, China; Crop Research Institute, Gansu Academy of Agricultural Sciences, Lanzhou, China
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Dhupkar P, Zhao H, Mukherjee S, Mujoo K, Zhang N, An Z. Abstract P5-11-09: Crk II adaptor proteins as positive regulators of HER3 signaling in breast cancer. Cancer Res 2013. [DOI: 10.1158/0008-5472.sabcs13-p5-11-09] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
HER3 (ErbB3), which is a member of the human epidermal growth factor receptor (EGFR) family has emerged as a key oncogene in cancer progression. HER3 overexpression has been observed in lung, prostate, melanomas and colon cancers and is associated with poor patient prognosis. HER3 has been known to play a role in resistance mechanisms towards EGFR tyrosine kinase inhibitors like Gefitinib and anti-HER2 antibodies like Trastuzumab in lung and breast cancers respectively. Upon ligand (neuregulin) binding, HER3 heterodimerizes with its partner receptors, inducing phosphorylation of its tyrosine residues in the c-terminal tail, which mediate HER3-dependent signaling. By binding to the HER3 c-terminal tail, Src homology 2 domain (SH2) or phosphotyrosine-binding (PTB) proteins may regulate the neuregulin-induced signaling. Here, we used a SH2 profiling approach to discover novel SH2 adaptor proteins interacting with HER3 and found that the SH2 adaptor protein Crk II (C10 regulator of kinase II) interacts strongly with phosphotyrosines in CHO cells overexpressing HER3 with or without neuregulin stimulation. Crk II and HER3 are critical in proliferation, migration and invasion of breast cancer cells. In this study, we investigate the protein-protein interaction of Crk II and HER3 in breast cancer. Our preliminary protein-protein interaction data confirmed that Crk II interacts with HER3 in MCF-7, MDA-MB-453 and MDA-MB-468 breast cancer cells. We hypothesize that Crk II affects HER3-induced signaling, thus affecting growth and migration in breast cancer cells.
Citation Information: Cancer Res 2013;73(24 Suppl): Abstract nr P5-11-09.
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Affiliation(s)
- P Dhupkar
- University of Texas M.D. Anderson Cancer Centre, Houston, TX
| | - H Zhao
- University of Texas M.D. Anderson Cancer Centre, Houston, TX
| | - S Mukherjee
- University of Texas M.D. Anderson Cancer Centre, Houston, TX
| | - K Mujoo
- University of Texas M.D. Anderson Cancer Centre, Houston, TX
| | - N Zhang
- University of Texas M.D. Anderson Cancer Centre, Houston, TX
| | - Z An
- University of Texas M.D. Anderson Cancer Centre, Houston, TX
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Mukherjee S, Huang Z, Fa M, Dhupkar P, Mujoo K, Zhang N, An Z. Abstract P5-11-03: Deciphering the role of HER3-DJ-1 interaction in breast cancer. Cancer Res 2013. [DOI: 10.1158/0008-5472.sabcs13-p5-11-03] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Advanced breast cancer is notorious for its aggressive nature and poor prognosis. An ablated regulation in the EGFR family receptor signaling has been linked to the development of numerous tumor types, including breast cancer. HER3 is a unique member of the EGFR family that lacks intrinsic tyrosine kinase activity. However, HER3 can initiate signaling when dimerized with other family members such as HER2. HER3 overexpression is correlated with poor survival in breast cancer patients. HER3 also plays an important role in drug resistance mechanism such as in trastuzumab resistant breast cancer cell lines where it dimerize with EGFR to initiate signaling via the PI3K/Akt pathway. The identification of interaction partners of HER3's C-tail is critical to understand the signaling mechanism underpinning HER3's role in drug resistance and in progression of breast cancer. Our laboratory has identified a panel of novel HER3-interacting proteins by a combined immunoprecipitation and mass-spectrometry approach. One of the novel HER3 interacting proteins is DJ-1 which is a chaperone protein that plays an important role in the development of many cancers, including breast cancer. DJ-1 knockdown in high HER3 expressing breast cancer cell lines such as MCF-7 and MDA- MB-453 resulted in the reduction in HER3 levels as well as proteins downstream of the HER3 signaling pathway such as MAPK. We have also demonstrated that DJ-1 knockdown led to decrease in cancer cell proliferation. Studies are now in progress to determine the mechanism of regulation of HER3 by DJ-1 and the impact of DJ-1 KD in in vivo breast cancer xenograft models. These studies will help us to decipher key molecules which regulate HER3 mediated signaling and their role in breast cancer development and progression.
Citation Information: Cancer Res 2013;73(24 Suppl): Abstract nr P5-11-03.
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Affiliation(s)
- S Mukherjee
- UT Houston M.D Anderson Cancer Center, Houston, TX
| | - Z Huang
- UT Houston M.D Anderson Cancer Center, Houston, TX
| | - M Fa
- UT Houston M.D Anderson Cancer Center, Houston, TX
| | - P Dhupkar
- UT Houston M.D Anderson Cancer Center, Houston, TX
| | - K Mujoo
- UT Houston M.D Anderson Cancer Center, Houston, TX
| | - N Zhang
- UT Houston M.D Anderson Cancer Center, Houston, TX
| | - Z An
- UT Houston M.D Anderson Cancer Center, Houston, TX
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Lin Y, Zhou J, Sha L, Li Y, Qu X, Liu L, Chen H, An Z, Wang Y, Sun C. Metabolite differences in the lenticular nucleus in type 2 diabetes mellitus shown by proton MR spectroscopy. AJNR Am J Neuroradiol 2013; 34:1692-6. [PMID: 23598834 DOI: 10.3174/ajnr.a3492] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
BACKGROUND AND PURPOSE Previous studies by using proton MR spectroscopy found metabolite abnormalities in the cerebral cortex and white matter of patients with type 2 diabetes mellitus. The present study was undertaken to detect metabolite differences in the lenticular nuclei and thalamus in patients with T2DM. MATERIALS AND METHODS Twenty subjects with T2DM and 22 age-matched control subjects underwent single-voxel MR spectroscopy in the left and right lenticular nuclei and left and right thalami. NAA/Cr and Cho/Cr ratios were calculated. Brain lactic acid, fasting blood glucose, and glycosylated hemoglobin levels were also monitored. RESULTS The NAA/Cr ratio was lower in the left lenticular nuclei of subjects with T2DM (P = .007), whereas the Cho/Cr ratio was increased in both the and right lenticular nuclei (P = .001). The NAA/Cr ratio was negatively correlated with FBG in the left (r = -0.573, P = .008) and right nuclei (r = -0.564, P = .010). It was also negatively correlated to HbA1c in the left (r = -0.560, P = .010) and right (r = -0.453, P = .045) nuclei. The Cho/Cr ratio was positively correlated with these variables (P < .05). No significant differences in NAA/Cr or Cho/Cr ratios were observed in the thalamus of patients with T2DM. Lactic acid was not detected in any of the patients in the study. CONCLUSIONS The different metabolic statuses of the lenticular nuclei and thalamus suggest different effects of T2DM in each of these brain nuclei, with the lenticular nuclei being more vulnerable than the thalamus. The abnormal metabolic status was observed before lesions had appeared in these brain areas.
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Cai B, Zhang J, Zhang M, Li L, Feng W, An Z, Wang L. Micro-inflammation Characterized by Disturbed Treg/Teff Balance with Increasing sIL-2R in Patients with Type 2 Diabetes. Exp Clin Endocrinol Diabetes 2013; 121:214-9. [PMID: 23595796 DOI: 10.1055/s-0033-1333687] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- B. Cai
- Department of Laboratory Medicine, West China Hospital of Sichuan University, Sichuan, P.R. China
| | - J. Zhang
- Department of Laboratory Medicine, West China Hospital of Sichuan University, Sichuan, P.R. China
| | - M. Zhang
- Department of Laboratory Medicine, West China Hospital of Sichuan University, Sichuan, P.R. China
| | - L. Li
- Department of Laboratory Medicine, West China Hospital of Sichuan University, Sichuan, P.R. China
| | - W. Feng
- Department of Laboratory Medicine, West China Hospital of Sichuan University, Sichuan, P.R. China
| | - Z. An
- Department of Endocrinology, West China Hospital of Sichuan University, Sichuan, P.R. China
| | - L. Wang
- Department of Laboratory Medicine, West China Hospital of Sichuan University, Sichuan, P.R. China
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Abstract
The spin current, orbit angular momentum current and total angular momentum current in a tensor form have been universally defined according to the quantum electrodynamics. Their conservation quantities and the continuity equations have been discussed in different cases. Non-relativistic approximation forms are deduced in order to explain their physical meanings, and to analyze some experimental results. The spin current of helical edge states in HgTe/CdTe quantum wells is calculated to demonstrate the properties of the spin current of the two dimensional quantum spin-Hall system. A generalized spin-orbit coupling term in the semiconducting media is deduced based on the theory of the electrodynamics in the moving media. It is recommended to use the effective total angular momentum current instead of the pure spin current to describe the distribution of polarization and the transport properties in spintronics.
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Affiliation(s)
- Z An
- Key Laboratory of Artificial Micro- and Nano-structures of Ministry of Education, and School of Physics and Technology, Wuhan University , Wuhan 430072, China
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Park W, An Z, Liu X, Song H, Kim W, Yu J. EP-1569 EFFECT OF LOW DOSE TROGLITAZONE ON RADIATION SENSITIVITY IN CERVIX CANCER CELLS. Radiother Oncol 2012. [DOI: 10.1016/s0167-8140(12)71902-3] [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: 11/17/2022]
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An Z, Zhang W. Role of inflammatory factor s in the pathology of acute myocardial infarction. Heart 2011. [DOI: 10.1136/heartjnl-2011-300867.425] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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An Z, Zhang W. Analysis of left ventricular remodelling in patients treated with cardiac resynchronisation therapy. Heart 2011. [DOI: 10.1136/heartjnl-2011-300867.528] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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Di B, Meng Y, Wang YD, Liu XJ, An Z. Electroluminescence Enhancement in Polymer Light-Emitting Diodes through Inelastic Scattering of Oppositely Charged Bipolarons. J Phys Chem B 2011; 115:9339-44. [DOI: 10.1021/jp2006342] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- B. Di
- College of Physics and Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang 050016, China
| | - Y. Meng
- College of Physics and Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang 050016, China
| | - Y. D. Wang
- College of Physics and Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang 050016, China
| | - X. J. Liu
- College of Physics and Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang 050016, China
| | - Z. An
- College of Physics and Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang 050016, China
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Affiliation(s)
- B. Di
- College of Physics, and Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang 050016, China
| | - Y. Meng
- College of Physics, and Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang 050016, China
| | - Y. D. Wang
- College of Physics, and Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang 050016, China
| | - X. J. Liu
- College of Physics, and Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang 050016, China
| | - Z. An
- College of Physics, and Hebei Advanced Thin Films Laboratory, Hebei Normal University, Shijiazhuang 050016, China
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Gudas JM, Torgov M, An Z, Jia XC, Morrison KJ, Morrison RK, Vincent M, Yang P, Kanner SB, Jakobovits A. Use of AGS-16M8F as a novel antibody drug conjugate (ADC) for treating renal cancers. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.e15014] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Dev SB, Nanda GS, An Z, Wang X, Hoffman RM, Hofmann GA. Effective Electroporation Therapy of Human Pancreatic Tumors Implanted in Nude Mice. Drug Deliv 2008; 4:293-9. [DOI: 10.3109/10717549709052016] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [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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Jakobovits A, Gudas J, An Z, Ganguly N, Morrison KR, Morrison KJ, Raitano AB, Satpaev D, Jia X, Kanner SB. AGS-16M18: A novel therapeutic human monoclonal antibody for the treatment of kidney and liver cancers. J Clin Oncol 2008. [DOI: 10.1200/jco.2008.26.15_suppl.3050] [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: 11/20/2022] Open
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Abstract
Within an extended Su-Schrieffer-Heeger model including interchain interactions and the extended Hubbard model, the dynamical relaxation of photoexcitations in two coupled conjugated polymer chains is investigated by using a nonadiabatic evolution method. Initially, one of the two chains is photoexcited and the other chain is in the dimerized ground state. Due to the interchain interactions, the electron and/or the hole can be transferred from one chain to the other chain. For weak interchain coupling, the dynamical evolution of the lattice on the photoexcited chain is similar to that found in an isolate single chain case. With interchain interactions increasing, the amplitude of the distortions on the photoexcited chain decreases, and simultaneously, that on the other chain gradually increases. Until stronger interchain coupling, the deformations of the two chains have almost the same amplitude. Besides intrachain polaron-excitons and intrachain oppositely charged polaron pairs as found in single chain case, interchain polaron-excitons and interchain separated charged polaron pairs are obtained. The results show that the yield of interchain products increases and that of intrachain products decreases with interchain coupling increasing. Totally, the yield of charged polarons (including intrachain oppositely charged polaron pairs and interchain oppositely charged polaron pairs) is about 25%, in good agreement with results from experiments.
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Affiliation(s)
- Y Meng
- College of Physics, Hebei Normal University, Shijiazhuang, China
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Ireland C, Peekhaus N, Lu P, Sangari R, Zhang A, Masurekar P, An Z. The tryptophan synthetase gene TRP1 of Nodulisporium sp.: molecular characterization and its relation to nodulisporic acid A production. Appl Microbiol Biotechnol 2008; 79:451-9. [PMID: 18389234 DOI: 10.1007/s00253-008-1440-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2007] [Revised: 02/26/2008] [Accepted: 02/29/2008] [Indexed: 10/22/2022]
Abstract
Nodulisporic acid A (NAA), an insecticidal indole diterpene, is produced by the fungus Nodulisporium sp. Since indole-3-glycerolphosphate is the precursor of the indole moiety of NAA, it is suggested that the activity of tryptophan synthetase may play a role in NAA biosynthesis. To investigate this hypothesis, the tryptophan synthetase gene TRP1 of Nodulisporium sp. was cloned and characterized. The gene consists of three introns of 146, 68, and 57 bp. The four exons encode a protein of 712 amino acids, the sequence of which is highly homologous to that of other fungal tryptophan synthetase proteins. The transcription initiation site was mapped 66 bp upstream to the ATG, and the polyA tail attachment site is 169 bp downstream to the translation stop codon. Replacement of the N-terminal half of the gene with a hygromycin selection marker yielded mutants with the tryptophan auxotroph/hygromycin-resistance (trp(-)/hyr) phenotype. The TRP1 mutants required a high concentration of tryptophan supplement in solid medium (10 mM) to sustain minimal growth and failed to produce NAA in the production medium (FFL-CAM) supplemented with high concentrations of tryptophan.
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Affiliation(s)
- C Ireland
- Merck Research Laboratories, PO Box 2000, RY80Y-325, Rahway, NJ 07065, USA
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Zhu L, Zhang LH, Liu BY, An Z. Crystal structure of diaquabis(1,10-phenanthroline)nickel(II) sulfate hydrate (1:5.6), [Ni(H2O)2(C12H8N2)2][SO4] · 5.6H2O. Z KRIST-NEW CRYST ST 2006. [DOI: 10.1524/ncrs.2006.0151] [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: 11/24/2022]
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