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Xie H, Cong S, Wang R, Sun X, Han J, Ni S, Zhang A. Effect of eHealth interventions on perinatal depression: A meta-analysis. J Affect Disord 2024; 354:160-172. [PMID: 38490593 DOI: 10.1016/j.jad.2024.03.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Revised: 02/29/2024] [Accepted: 03/09/2024] [Indexed: 03/17/2024]
Abstract
BACKGROUND Perinatal depression (PND) is a common mental health problem, and eHealth interventions may provide a strategy for alleviating PND. AIM This meta-analysis aimed to determine the effect of eHealth interventions on PND. METHODS Six databases were searched to retrieve published randomized controlled trials (RCTs) on the effect of eHealth interventions on PND. A meta-analysis was performed on the data of these studies using a random effects model. RESULTS A total of 21 RCTs were included in the meta-analysis, which revealed that eHealth interventions significantly reduced antenatal depression (WMD = -1.64, 95 % CI [-2.92, -0.35], P = .013), postpartum depression (SMD = -0.41, 95 % CI [-0.52, -0.29], P < .001), anxiety (SMD = -0.39, 95 % CI [-0.51, -0.28], P < .001), stress (WMD = -2.93, 95 % CI [-4.58, -1.27], P = .001), and improved self-efficacy (SMD = 0.42, 95 % CI [0.21, 0.63], P < .001) compared with the control group. However, eHealth interventions did not significantly improve social support (SMD = 0.27, 95 % CI [-0.01, 0.56], P = .058). For antenatal depression, significant subgroup differences were observed in the digital platform and material presentation format. In addition, for postpartum depression, significant subgroup differences were found in the type of therapy. CONCLUSIONS The meta-analysis results suggest that eHealth interventions can relieve depression, anxiety, and stress symptoms and improve self-efficacy in perinatal women. However, these interventions did not improve social support. Additional high-quality studies on eHealth interventions in PND are needed to validate these results.
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Affiliation(s)
- Hongyan Xie
- School of Nursing, Nanjing Medical University, Jiangsu, China
| | - Shengnan Cong
- Women's Hospital of Nanjing Medical University, Nanjing Women and Children's Healthcare Hospital, Jiangsu, China
| | - Rui Wang
- Central South University Xiangya School of Nursing, Hunan, China
| | - Xiaoqing Sun
- Affiliated Hospital of Xuzhou Medical University, Jiangsu, China
| | - Jingjing Han
- School of Nursing, Suzhou University, Jiangsu, China
| | - Shiqian Ni
- School of Nursing, Nanjing Medical University, Jiangsu, China
| | - Aixia Zhang
- Women's Hospital of Nanjing Medical University, Nanjing Women and Children's Healthcare Hospital, Jiangsu, China.
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2
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Hu H, Xie P, Li C, Ni S, Wang H, Li A, Wei H, Li W. Evaluation of CT angiography obstruction score and pulmonary perfusion defect score using the third-generation dual-source CT for pulmonary embolism. Clin Radiol 2023:S0009-9260(23)00216-7. [PMID: 37331850 DOI: 10.1016/j.crad.2023.04.017] [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] [Received: 07/13/2022] [Revised: 04/07/2023] [Accepted: 04/25/2023] [Indexed: 06/20/2023]
Abstract
AIM To investigate the application value of computed tomography (CT) angiography (CTA) obstruction score and pulmonary perfusion defect score on the third-generation dual-source CT for pulmonary embolism and the changes of the right ventricular function. MATERIALS AND METHODS The clinical data of 52 patients with pulmonary embolism (PE) confirmed using the third-generation dual-source dual-energy CTPA were analysed retrospectively. These patients were divided into the severe group and non-severe group according to their clinical manifestations. The results of CTPA and dual-energy pulmonary perfusion imaging (DEPI) were recorded by two radiologists for index computation. The ratio of the maximum short-axis diameter of the right ventricle (RV) to that of the left ventricle (LV) was also recorded. The correlation analysis between RV/LV and the mean values of CTA obstruction score and perfusion defect score was performed. Correlation analysis and agreement analysis were performed on the data measured by two radiologists, CTA obstruction score, and pulmonary perfusion defect score. RESULTS CTA obstruction score and perfusion defect score measured by the two radiologists had good correlation and agreement. CTA obstruction score, perfusion defect score, and RV/LV were significantly lower in the non-severe group than in the severe PE group. RV/LV had a significant positive correlation with CTA obstruction score and perfusion defect score (p<0.05). CONCLUSION The third-generation dual-source dual-energy CT plays a positive role in assessing PE severity and RV function and can provide additional information for the clinical management and treatment of PE patients.
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Affiliation(s)
- H Hu
- CT Room, The First People's Hospital of Lanzhou City, Lanzhou 730050, China
| | - P Xie
- Department of Radiation Oncology, The First Hospital of Lanzhou University, Lanzhou 730030, China
| | - C Li
- Department of Neurology, The First People's Hospital of Lanzhou City, Lanzhou 730050, China
| | - S Ni
- Department of Gastroenterology, The First People's Hospital of Lanzhou City, Lanzhou 730050, China
| | - H Wang
- CT Room, The First People's Hospital of Lanzhou City, Lanzhou 730050, China
| | - A Li
- CT Room, The First People's Hospital of Lanzhou City, Lanzhou 730050, China
| | - H Wei
- Department of Cardiology, The First People's Hospital of Lanzhou City, Lanzhou 730050, China.
| | - W Li
- CT Room, The First People's Hospital of Lanzhou City, Lanzhou 730050, China.
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3
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Zhao L, Li H, He YY, Wang K, Wang J, Yan DG, Ni S, Zhu YM, Liu SY. [Analysis of surgical strategy for pediatric papillary thyroid carcinoma with low-intermediate risk]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2022; 57:1396-1402. [PMID: 36707942 DOI: 10.3760/cma.j.cn115330-20220511-00261] [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: 01/29/2023]
Abstract
Objective: To explore the feasibility and rationality of lobectomy in the treatment of pediatric thyroid papillary carcinoma (PTC) with low-intermediate risk. Methods: The clinicopathological features and follow-up data of pediatric PTC with low-intermediate risk were reviewed from March 2000 to December 2018 in Cancer Hospital of Chinese Academy of Medical Sciences. The correlations between different surgical procedures and prognoses were evaluated. Propensity score matching(PSM) was used to adjust for risk factors, and the difference in prognoses between the total thyroidectomy (TT) group and the lobectomy (LT) group was compared. Results: A total of 140 patients were included in the study, including 36 males and 104 females. The age range was from 6-year-old to 18-year-old. There were 43 low-risk patients and 97 intermediate-risk patients. The median follow-up time was 87.5 months, ranging from 8 to 241 months, and 20 patients (14.3%) showed recurrence during the follow-up period. Univariate analysis showed that N1b, extrathyroidal extension, the number of lymph node metastasis>5, the ratio of lymph node metastasis≥0.19, and radioactive iodine treatment were risk factors for recurrence (all P value below 0.05), but multivariate analysis showed that only the ratio of lymph node metastasis≥0.19 (HR=8.69, 95%CI=1.08-70.21, P=0.043) was an independent risk factor for recurrence. There was no significant difference in the 5-year recurrence free survival rates between TT group and LT group before propensity score matching (82.8% vs. 86.5%, χ2=0.219, P=0.640) and after propensity score matching (89.6% vs. 90.4%, χ2=0.099, P=0.753). Conclusion: There is no significant difference in recurrence-free survival between TT group and LT group. Lobectomy is feasible for selective pediatric PTC with low-intermediate risk.
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Affiliation(s)
- L 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, Beijing 100021, China
| | - H 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, Beijing 100021, China
| | - Y Y He
- 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, Beijing 100021, China
| | - K Wang
- 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, Beijing 100021, China
| | - J Wang
- 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, Beijing 100021, China
| | - D G Yan
- 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, Beijing 100021, China
| | - S Ni
- 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, Beijing 100021, China
| | - Y M Zhu
- 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, Beijing 100021, China
| | - S Y Liu
- 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, Beijing 100021, China
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Hall-Chen VH, Damba J, Parra FI, Pratt QT, Michael CA, Peng S, Rhodes TL, Crocker NA, Hillesheim JC, Hong R, Ni S, Peebles WA, Png CE, Ruiz Ruiz J. Validating and optimizing mismatch tolerance of Doppler backscattering measurements with the beam model (invited). Rev Sci Instrum 2022; 93:103536. [PMID: 36319398 DOI: 10.1063/5.0101805] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Accepted: 09/07/2022] [Indexed: 06/16/2023]
Abstract
We use the beam model of Doppler backscattering (DBS), which was previously derived from beam tracing and the reciprocity theorem, to shed light on mismatch attenuation. This attenuation of the backscattered signal occurs when the wavevector of the probe beam's electric field is not in the plane perpendicular to the magnetic field. Correcting for this effect is important for determining the amplitude of the actual density fluctuations. Previous preliminary comparisons between the model and Mega-Ampere Spherical Tokamak (MAST) plasmas were promising. In this work, we quantitatively account for this effect on DIII-D, a conventional tokamak. We compare the predicted and measured mismatch attenuation in various DIII-D, MAST, and MAST-U plasmas, showing that the beam model is applicable in a wide variety of situations. Finally, we performed a preliminary parameter sweep and found that the mismatch tolerance can be improved by optimizing the probe beam's width and curvature at launch. This is potentially a design consideration for new DBS systems.
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Affiliation(s)
- V H Hall-Chen
- Institute of High Performance Computing, Singapore 138632, Singapore
| | - J Damba
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - F I Parra
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08540, USA
| | - Q T Pratt
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - C A Michael
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - S Peng
- UKAEA/CCFE, Culham Science Centre, Abingdon, Oxon OX14 3DB, United Kingdom
| | - T L Rhodes
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - N A Crocker
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - J C Hillesheim
- UKAEA/CCFE, Culham Science Centre, Abingdon, Oxon OX14 3DB, United Kingdom
| | - R Hong
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - S Ni
- Cavendish Laboratory, University of Cambridge, Cambridge CB3 0HE, United Kingdom
| | - W A Peebles
- Department of Physics and Astronomy, University of California, Los Angeles, California 90095, USA
| | - C E Png
- Institute of High Performance Computing, Singapore 138632, Singapore
| | - J Ruiz Ruiz
- Rudolf Peierls Centre for Theoretical Physics, University of Oxford, Oxford OX1 3PU, United Kingdom
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5
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Huang J, Huang W, Wang Q, Zhang C, Ni S, Sun D, Zhou Y, Hou T, Sun W, Chen Z, Wu YL. MA02.05 Dynamic Mutation Profiles of SCLC Transformation in NSCLC Patients Harboring Concurrent EGFR/TP53/RB1 Mutations. J Thorac Oncol 2022. [DOI: 10.1016/j.jtho.2022.07.084] [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: 11/28/2022]
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Jin L, Zhang X, Li Z, Ni S, Yan D, Liu S, An C. 1749P A multivariate logistic regression model to predict lateral lymph node metastases of medullary thyroid cancer. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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7
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Buratta S, Shimanaka Y, Costanzi E, Ni S, Urbanelli L, Kono N, Morena F, Sagini K, Giovagnoli S, Romani R, Gargaro M, Arai H, Emiliani C. Lipotoxic stress alters the membrane lipid profile of extracellular vesicles released by Huh-7 hepatocarcinoma cells. Sci Rep 2021; 11:4613. [PMID: 33633289 PMCID: PMC7907093 DOI: 10.1038/s41598-021-84268-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Accepted: 02/10/2021] [Indexed: 12/12/2022] Open
Abstract
Extracellular vesicles (EVs) are well-known mediators in intercellular communication playing pivotal roles in promoting liver inflammation and fibrosis, events associated to hepatic lipotoxicity caused by saturated free fatty acid overloading. However, despite the importance of lipids in EV membrane architecture which, in turn, affects EV biophysical and biological properties, little is known about the lipid asset of EVs released under these conditions. Here, we analyzed phospholipid profile alterations of EVs released by hepatocarcinoma Huh-7 cells under increased membrane lipid saturation induced by supplementation with saturated fatty acid palmitate or Δ9 desaturase inhibition, using oleate, a nontoxic monounsaturated fatty acid, as control. As an increase of membrane lipid saturation induces endoplasmic reticulum (ER) stress, we also analyzed phospholipid rearrangements in EVs released by Huh-7 cells treated with thapsigargin, a conventional ER stress inducer. Results demonstrate that lipotoxic and/or ER stress conditions induced rearrangements not only into cell membrane phospholipids but also into the released EVs. Thus, cell membrane saturation level and/or ER stress are crucial to determine which lipids are discarded via EVs and EV lipid cargos might be useful to discriminate hepatic lipid overloading and ER stress.
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Affiliation(s)
- Sandra Buratta
- Department of Chemistry, Biology and Biotechnology, University of Perugia, Perugia, Italy.
| | - Y Shimanaka
- Graduate School of Pharmaceutical Sciences, University of Tokyo, Tokyo, Japan
| | - E Costanzi
- Department of Chemistry, Biology and Biotechnology, University of Perugia, Perugia, Italy
| | - S Ni
- Graduate School of Pharmaceutical Sciences, University of Tokyo, Tokyo, Japan
| | - L Urbanelli
- Department of Chemistry, Biology and Biotechnology, University of Perugia, Perugia, Italy
| | - N Kono
- Graduate School of Pharmaceutical Sciences, University of Tokyo, Tokyo, Japan
| | - F Morena
- Department of Chemistry, Biology and Biotechnology, University of Perugia, Perugia, Italy
| | - K Sagini
- Department of Chemistry, Biology and Biotechnology, University of Perugia, Perugia, Italy.,Department of Molecular Cell Biology, Institute for Cancer Research, Oslo University Hospital, Oslo, Norway
| | - S Giovagnoli
- Department of Pharmaceutical Sciences, University of Perugia, Perugia, Italy
| | - R Romani
- Department of Experimental Medicine, University of Perugia, Perugia, Italy
| | - M Gargaro
- Department of Experimental Medicine, University of Perugia, Perugia, Italy
| | - H Arai
- Graduate School of Pharmaceutical Sciences, University of Tokyo, Tokyo, Japan.,AMED-CREST, Japan Agency for Medical Research and Development, Tokyo, Japan
| | - C Emiliani
- Department of Chemistry, Biology and Biotechnology, University of Perugia, Perugia, Italy
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8
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Meng LB, Zhang YJ, Ni S. Prediction of staggered stacking 2D BeP semiconductor with unique anisotropic electronic properties. J Phys Condens Matter 2020; 32:085301. [PMID: 31694008 DOI: 10.1088/1361-648x/ab54f9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
By comprehensive structure design and first-principles calculations, we report a novel two-dimensional (2D) BeP nanomaterial with exotic structural and properties. This BeP 2D material is formed by a couple honeycomb sheets by slab staggered stacking and strong interlayer bondings. It behaves as a natural 2D semiconductor with several notable properties: a modest bandgap (~1.34 eV), high room-temperature electron mobility (~104 cm2 V-1 s-1) and high visible-light absorption coefficient (~105 cm-1); Moreover, due to the unique stacking topology, BeP may display distinctive direction-dependent electric transport by the anisotropic polarity of electron and hole mobilities, that is, it exhibits n-type (electron mobility > hole mobility) along the armchair direction while acts as p -type (hole mobility > electron mobility) in the zigzag direction, thus promising for applications in nanoelectronics. The BeP has good dynamic and thermal stabilities and is also the lowest-energy structure of 2D space indicated by particle swarm search, implying the high feasibility of experimental synthesis.
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Affiliation(s)
- L-B Meng
- Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, People's Republic of China
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9
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Meng LB, Zhou MJ, Zhang YJ, Ni S. Intrinsic phonon-mediated superconductivity in graphene-like BSi lattice. J Phys Condens Matter 2019; 31:345401. [PMID: 31096196 DOI: 10.1088/1361-648x/ab21eb] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The research of new superconductors is an ongoing field for the fundamental significances and potential applications, and two-dimensional (2D) nanomaterials open a new alluring branch for exploration. Here we predict by first-principles calculations that 2D pristine graphene-like BSi monolayer is a phonon-mediated superconductor above the boiling point of liquid helium. The intrinsic covalent-metallic ground state, large density of states at Fermi energy, proper electronic organization as well as strong coupling of out-of-plane phonons and electrons endow an intermediate electron-phonon coupling of ~1.12, rendering this honeycomb sheet as a conventional superconductor with a relatively high T c ~ 11 K. As the global minimum structure in the 2D space previously predicted, this superconducting BSi monolayer may be feasible experimentally. Our finding provides a new field of superconducting nanomaterials for study.
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Affiliation(s)
- L-B Meng
- Research Center of Laser Fusion, China Academy of Engineering Physics, Mianyang 621900, People's Republic of China
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10
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Zhou L, Li P, Ni S, Yu Y, Yang M, Wei S, Qin Q. Rapid and sensitive detection of redspotted grouper nervous necrosis virus (RGNNV) infection by aptamer-coat protein-aptamer sandwich enzyme-linked apta-sorbent assay (ELASA). J Fish Dis 2017; 40:1831-1838. [PMID: 28745819 DOI: 10.1111/jfd.12656] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [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: 02/27/2017] [Accepted: 04/12/2017] [Indexed: 06/07/2023]
Abstract
Redspotted grouper nervous necrosis virus (RGNNV) is one of the most devastating pathogens in the aquaculture of the grouper, Epinephlus sp., worldwide. The early and rapid diagnosis of RGNNV is important for the prevention of RGNNV infection. In this study, an aptamer (A10)-based sandwich enzyme-linked apta-sorbent assay (ELASA) was developed for RGNNV diagnosis. This sandwich ELASA showed high specificity for the RGNNV coat protein (CP) and virions in virus-infected cells and tissues. At the optimized working concentration of 200 nM of aptamer, the ELASA could detect RGNNV in the lysates of as few as 4 × 103 RGNNV-infected GB cells. Incubation for 10 min was sufficient to produce accurate results. The sandwich ELASA was most stable at incubation temperatures of 4-25°C, but could still distinguish RGNNV-infected samples from the controls at 37°C. It could detect RGNNV infection in brain lysates diluted 1/10, with results consistent with those of reverse transcription PCR, although with 10% less sensitivity. The main equipment required includes dissection tools, a water bath, Pierce™ Streptavidin Coated Plates and a microplate reader. The sandwich ELASA has great potential utility for the rapid and sensitive diagnosis of RGNNV in its early stages by fish farmers.
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Affiliation(s)
- L Zhou
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
- University of Chinese Academy of Sciences, Beijing, China
| | - P Li
- Guangxi Key Laboratory of Marine Natural Products and Combinatorial Biosynthesis Chemistry, Guangxi Academy of Sciences, Nanning, China
| | - S Ni
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
- University of Chinese Academy of Sciences, Beijing, China
| | - Y Yu
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
- University of Chinese Academy of Sciences, Beijing, China
| | - M Yang
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
| | - S Wei
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
| | - Q Qin
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou, China
- College of Marine Sciences, South China Agricultural University, Guangzhou, China
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11
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He YY, Liu SY, Xu ZG, Tang PZ, Huang H, Wang J, Zhu YM, Yan DG, Zhang ZM, Ni S. [Clinical analysis of secondary cervical lymph node dissection in papillary thyroid carcinoma]. Zhonghua Zhong Liu Za Zhi 2017; 39:624-627. [PMID: 28835087 DOI: 10.3760/cma.j.issn.0253-3766.2017.08.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the value of secondary cervical lymph node dissection in papillary thyroid carcinoma (PTC). Methods: PTC patients with recurrence re-operated in a previously dissected area at our hospital during 2000-2016 were included in this analysis. Patients were divided according to the operative interval of 6 months. The level and number of lymph node metastasis and the number of lymph node dissection were analyzed to calculate the ratio of lymph node metastasis. Results: A total of 336 PTC patients received 360 side lateral cervical lymph nodes dissection. The ratio of recurrence in unilateral lateral neck is 92.9%(312/336). The ratio of recurrence in multiple levels (more than two regions) were 47.5% (171/360). The recurrence ratio of level Ⅱ, Ⅲ, Ⅳ and Ⅴ were 55.6%(200/360), 44.2%(159/360), 59.7%(215/360) and 10.3%(37/360), respectively. Lymph node metastases were inclined to level Ⅱ (33.6%) and Ⅳ (35.8%). The mean number of lymph node dissection and metastasis in the group of operative interval ≤ 6 months was 26.56 per case and 4.37 per case, respectively. The mean number of lymph node dissection and metastasis in the group of operative interval >6 months was 16.80 per case and 3.20 per case, respectively. The number of lymph node dissection and metastasis between these two groups were significantly different (P=0.001, P<0.001). Conclusions: Lymph node metastasis of PTC patients with secondary cervical lymph node dissection are inclined to level Ⅱ and level Ⅳ. Moreover, multi-level metastasis is not rare. Level Ⅱ and level Ⅳ require more attention in the first operation. Most of the patients undergo reoperation because of residual lymph nodes from the previous treatment. Normalization and completeness of the initial dissection are particularly important to PTC patients.
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Affiliation(s)
- Y Y He
- Department of Head and Neck Surgery, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - S Y Liu
- Department of Head and Neck Surgery, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Z G Xu
- Department of Head and Neck Surgery, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - P Z Tang
- Department of Head and Neck Surgery, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - H Huang
- Department of Head and Neck Surgery, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - J Wang
- Department of Head and Neck Surgery, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Y M Zhu
- Department of Head and Neck Surgery, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - D G Yan
- Department of Head and Neck Surgery, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Z M Zhang
- Department of Head and Neck Surgery, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - S Ni
- Department of Head and Neck Surgery, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
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12
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Li P, Zhou L, Wei S, Yang M, Ni S, Yu Y, Cai J, Qin Q. Establishment and characterization of a cell line from the head kidney of golden pompano Trachinotus ovatus and its application in toxicology and virus susceptibility. J Fish Biol 2017; 90:1944-1959. [PMID: 28271507 DOI: 10.1111/jfb.13277] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [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: 05/17/2016] [Revised: 11/26/2016] [Accepted: 01/12/2017] [Indexed: 06/06/2023]
Abstract
A cell line derived from the head kidney of golden pompano Trachinotus ovatus (TOHK) was established and characterized in this study. The TOHK cells grew most rapidly at 28° C and the optimum foetal bovine serum concentration in L-15 medium was 10%. The TOHK cells have a diploid chromosome number of 2N = 54. The transfection efficiency of TOHK cells was 7·5% at the 15th passage and 72% at the 40th passage. The transfection efficiency in TOHK cells was high, so these cells are suitable for foreign gene expression. The cytotoxic effects of heavy metals and extracellular products from Vibrio anguillarum and Vibrio alginolyticus were demonstrated in TOHK cells, so this TOHK cell line could also be applied in environmental monitoring of heavy metals and pathogenic bacteria. TOHK cell line showed high virus susceptibility, such as grouper nervous necrosis virus (GNNV) and Singapore grouper iridovirus (SGIV). Then, TOHK cell line could be used for the study of viral pathogenesis and the development of antiviral strategies.
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Affiliation(s)
- P Li
- Guangxi Key Laboratory of Marine Natural Products and Combinatorial Biosynthesis Chemistry, Guangxi Academy of Sciences, Nanning, 530007, China
| | - L Zhou
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou, 510301, China
- University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing, 100049, China
| | - S Wei
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou, 510301, China
| | - M Yang
- College of Marine Sciences, South China Agricultural University, Guangzhou, China
| | - S Ni
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou, 510301, China
- University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing, 100049, China
| | - Y Yu
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou, 510301, China
- University of Chinese Academy of Sciences, 19 Yuquan Road, Beijing, 100049, China
| | - J Cai
- College of Fishery, Guangdong Ocean University, Zhanjiang, 524088, China
| | - Q Qin
- Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, 164 West Xingang Road, Guangzhou, 510301, China
- College of Marine Sciences, South China Agricultural University, Guangzhou, China
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Ni S, Chui CHK, Ji X, Jordan L, Chan CLW. Subjective well-being amongst migrant children in China: unravelling the roles of social support and identity integration. Child Care Health Dev 2016; 42:750-8. [PMID: 27349854 DOI: 10.1111/cch.12370] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Revised: 05/22/2016] [Accepted: 05/23/2016] [Indexed: 11/28/2022]
Abstract
BACKGROUND Migrant children refer to rural children who accompany one or both parents to urban area. Empirical evidence showed that compared with their urban counterparts, migrant children had poorer developmental, emotional and psychological health. METHOD A sample of 1306 migrant children were recruited to examine the characteristics of migrant children and investigate the effects of identity integration, support and socioeconomic factors (e.g. age, gender, type of school, family socioeconomic status, city type) on their subjective wellbeing. RESULTS Children with higher levels of identity integration, social support, family socioeconomic status, who attended public school and who lived in the third-tiered city of Weihai demonstrated better subjective wellbeing. Social support remained a strong predictor for subjective wellbeing, despite a significant mediating effect of identity integration. CONCLUSIONS These results highlight the need for policymakers and practitioners alike to address individual factors pertaining to psychological adjustments, as well as social determinants of subjective wellbeing in the context of migration.
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Affiliation(s)
- S Ni
- Center for Social Work and Mental Health, Tsinghua University Graduate School at Shenzhen, Shenzhen, Guangdong, China
| | - C H-K Chui
- Department of Social Work and Social Administration, University of Hong Kong, Hong Kong
| | - X Ji
- Department of Social Work and Social Administration, University of Hong Kong, Hong Kong
| | - L Jordan
- Department of Social Work and Social Administration, University of Hong Kong, Hong Kong
| | - C L-W Chan
- Department of Social Work and Social Administration, University of Hong Kong, Hong Kong
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Zhu YM, Zhang H, Ni S, Wang J, Li DZ, Liu SY. [Multi-disciplinary treatment increases the survival rate of late stage pharyngeal, laryngeal or cervical esophageal cancers treated by free jejunal flap reconstruction after cancer resection]. Zhonghua Zhong Liu Za Zhi 2016; 38:389-94. [PMID: 27188615 DOI: 10.3760/cma.j.issn.0253-3766.2016.05.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To investigate the survival status of patients with pharyngeal, laryngeal or cervical esophageal cancers, who received free jejunal flap (FJF) to repair the defects following tumor resection, and to analyze the effect of multi-disciplinary treatment on their survival. METHODS Fifty-eight patients with pharyngeal, laryngeal or cervical esophageal cancer underwent free jejunal flap (FJF) reconstruction after cancer resection between 2010 and 2013. All their clinical records were reviewed and analyzed. RESULTS The success rate of flap transplantation was 91.4% (53/58). The 2-year overall survival rates (OSR) of cervical esophageal cancer and hypopharyngeal cancer patients were 67.5% and 49.3%, respectively, both were significantly better than that of laryngeal cancer. The main causes of death were local recurrence and distant metastases. The group with no short-term complications had a better two-year OSR (59.0%) than the group with short-term complications (46.6%), however, the difference between them was not significant (P=0.103). The 2-year survival rate of the initial treatment group was 65.0%, better than that of the salvage treatment group (49.4%), but the difference was not significant (P=0.051). For the stage III and IV patients, the multi-disciplinary treatment group had a significantly better 2-year OSR (64.7%) than the single or sequential treatment group (37.0%, P=0.016). CONCLUSIONS Free jejunal flap reconstruction is an ideal option for repairing the cervical digestive tract circumferential defects caused by tumor resection with a high success rate and a low mortality. Compared with the single or sequential treatment, multi-disciplinary treatment can significantly improve the survival rate of late-stage hypopharyngeal and cervical esophageal cancer patients.
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Affiliation(s)
- Y M Zhu
- Department of Head and Neck Surgery, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical Collge, Beijing 100021, China
| | - H Zhang
- Department of Medical Records, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical Collge, Beijing 100021, China
| | - S Ni
- Department of Head and Neck Surgery, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical Collge, Beijing 100021, China
| | - J Wang
- Department of Head and Neck Surgery, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical Collge, Beijing 100021, China
| | - D Z Li
- Department of Head and Neck Surgery, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical Collge, Beijing 100021, China
| | - S Y Liu
- Department of Head and Neck Surgery, National Cancer Center/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical Collge, Beijing 100021, China
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Adam R, Graves A, Ni S, McPheeters M. Time trends in post-hysterectomy vesicovaginal fistula and lower urinary tract injury. J Minim Invasive Gynecol 2015. [DOI: 10.1016/j.jmig.2014.12.022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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16
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Li C, Shi C, Kim J, Chen Y, Ni S, Jiang L, Zheng C, Li D, Hou J, Taichman RS, Sun H. Erythropoietin promotes bone formation through EphrinB2/EphB4 signaling. J Dent Res 2015; 94:455-63. [PMID: 25586589 DOI: 10.1177/0022034514566431] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Recent studies have demonstrated that erythropoietin (EPO) has extensive nonhematopoietic biological functions. However, little is known about how EPO regulates bone formation, although several studies suggested that EPO can affect bone homeostasis. In this study, we investigated the effects of EPO on the communication between osteoclasts and osteoblasts through the ephrinB2/EphB4 signaling pathway. We found that EPO slightly promotes osteoblastic differentiation with the increased expression of EphB4 in ST2 cells. However, EPO increased the expression of Nfatc1 and ephrinB2 but decreased the expression of Mmp9 in RAW264.7 cells, resulting in an increase of ephrinB2-expressing osteoclasts and a decrease in resorption activity. The stimulation of ephrinB2/EphB4 signaling via ephrinB2-Fc significantly promoted EPO-mediated osteoblastic differentiation in ST2 cells. EphB4 knockdown through EphB4 shRNA inhibited EPO-mediated osteoblastic phenotypes. Furthermore, in vivo assays clearly demonstrated that EPO efficiently induces new bone formation in the alveolar bone regeneration model. Taken together, these results suggest that ephrinB2/EphB4 signaling may play an important role in EPO-mediated bone formation.
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Affiliation(s)
- C Li
- School and Hospital of Stomatology, Jilin University, Changchun, Jilin Province, China
| | - C Shi
- School and Hospital of Stomatology, Jilin University, Changchun, Jilin Province, China
| | - J Kim
- Department of Periodontics and Oral Medicine, University of Michigan, School of Dentistry, Ann Arbor, MI, USA
| | - Y Chen
- Department of Stomatology, First People's Hospital of Chenzhou, Chenzhou, Hunan Province, China
| | - S Ni
- School and Hospital of Stomatology, Jilin University, Changchun, Jilin Province, China
| | - L Jiang
- School and Hospital of Stomatology, Jilin University, Changchun, Jilin Province, China
| | - C Zheng
- National Institute of Dental and Craniofacial Research, National Institutes of Health, MD, USA
| | - D Li
- School and Hospital of Stomatology, Jilin University, Changchun, Jilin Province, China
| | - J Hou
- School and Hospital of Stomatology, Jilin University, Changchun, Jilin Province, China
| | - R S Taichman
- Department of Periodontics and Oral Medicine, University of Michigan, School of Dentistry, Ann Arbor, MI, USA
| | - H Sun
- School and Hospital of Stomatology, Jilin University, Changchun, Jilin Province, China
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Sun R, Zhao G, Ni S, Xia Q. Lipid based nanocarriers with different lipid compositions for topical delivery of resveratrol: comparative analysis of characteristics and performance. J Drug Deliv Sci Technol 2014. [DOI: 10.1016/s1773-2247(14)50124-4] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Wang HX, Chen YY, Ge L, Fang TT, Meng J, Liu Z, Fang XY, Ni S, Lin C, Wu YY, Wang ML, Shi NN, He HG, Hong K, Shen YM. PCR screening reveals considerable unexploited biosynthetic potential of ansamycins and a mysterious family of AHBA-containing natural products in actinomycetes. J Appl Microbiol 2013; 115:77-85. [PMID: 23594089 DOI: 10.1111/jam.12217] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Revised: 03/30/2013] [Accepted: 04/14/2013] [Indexed: 11/26/2022]
Abstract
AIMS Ansamycins are a family of macrolactams that are synthesized by type I polyketide synthase (PKS) using 3-amino-5-hydroxybenzoic acid (AHBA) as the starter unit. Most members of the family have strong antimicrobial, antifungal, anticancer and/or antiviral activities. We aimed to discover new ansamycins and/or other AHBA-containing natural products from actinobacteria. METHODS AND RESULTS Through PCR screening of AHBA synthase gene, we identified 26 AHBA synthase gene-positive strains from 206 plant-associated actinomycetes (five positives) and 688 marine-derived actinomycetes (21 positives), representing a positive ratio of 2·4-3·1%. Twenty-five ansamycins, including eight new compounds, were isolated from six AHBA synthase gene-positive strains through TLC-guided fractionations followed by repeated column chromatography. To gain information about those potential ansamycin gene clusters whose products were unknown, seven strains with phylogenetically divergent AHBA synthase genes were subjected to fosmid library construction. Of the seven gene clusters we obtained, three show characteristics for typical ansamycin gene clusters, and other four, from Micromonospora spp., appear to lack the amide synthase gene, which is unusual for ansamycin biosynthesis. The gene composition of these four gene clusters suggests that they are involved in the biosynthesis of a new family of hybrid PK-NRP compounds containing AHBA substructure. CONCLUSIONS PCR screening of AHBA synthase is an efficient approach to discover novel ansamycins and other AHBA-containing natural products. SIGNIFICANCE AND IMPACT OF THE STUDY This work demonstrates that the AHBA-based screening method is a useful approach for discovering novel ansamycins and other AHBA-containing natural products from new microbial resources.
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Affiliation(s)
- H-X Wang
- State Key Laboratory of Microbial Technology, School of Life Sciences, Shandong University, Jinan, China
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Zhang Y, Yao K, Yu Y, Ni S, Zhang L, Wang W, Lai K. Effects of 1.8 GHz radiofrequency radiation on protein expression in human lens epithelial cells. Hum Exp Toxicol 2013; 32:797-806. [PMID: 23338683 DOI: 10.1177/0960327112472353] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
OBJECTIVE The aim of the present study was to observe the effects of 1.8 GHz radiofrequency (RF) radiation on the protein expression of human lens epithelial cells (hLECs) in vitro. METHODS The hLECs were exposed and sham-exposed to 1.8 GHz RF radiation (specific absorption rate (SAR) of 4 W/kg) for 2 h. After exposure, the proteins extracted from LECs were loaded on the Ettan MDLC system connected to the LTQ-Orbitrap MS for screening the candidate protein biomarkers induced by RF. The quantitative real-time polymerase chain reaction (qRT-PCR) was used to detect the levels of messenger RNA of candidate biomarkers. After the hLECs were exposed to 1.8 GHz RF (SAR of 2, 3 and 4 W/kg) for 2 h, the Western blot assay was utilized to measure the expression levels of the above-screened candidate protein biomarkers. RESULTS The results of shotgun proteomic analysis indicated that there were eight proteins with differential expression between exposure and sham exposure groups. The results of qRT-PCR showed that there were three genes with expressional differences (valosin containing protein (VCP), ubiquitin specific peptidase 35 (USP35) and signal recognition particle 68 kDa (SRP68)) between exposure and sham exposure groups. The results of Western blot assay exhibited that the expressional levels of VCP and USP35 proteins significantly increased and the expressional level of protein SRP68 significantly decreased in hLECs exposed to 1.8 GHz RF radiation (SAR of 3 and 4 W/kg) for 2 h when compared with the corresponding sham groups (p < 0.05). CONCLUSION The shotgun proteomics technique can be applied to screen the proteins with differential expression between hLECs exposed to 1.8 GHz RF and hLECs sham-exposed to 1.8 GHz RF, and three protein biomarkers associated with RF radiation were validated by Western blot assay.
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Affiliation(s)
- Y Zhang
- Eye Center, Affiliated Second Hospital, College of Medicine, Zhejiang University, Hangzhou, China
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20
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Gao J, Li Y, Cai Y, Chen J, Shen Y, Ni S, Wei Y, Qiu Y, Zhu X, Liu Y, Lu C, Chen C, Niu Q, Tang C, Yang Y, Wang Q, Cui W, Xia J, Liu T, Zhang J, Zhao B, Guo Z, Pan J, Chen H, Luo Y, Sun L, Xiao X, Chen Q, Zhao X, He F, Lv L, Guo L, Liu L, Li H, Shi S, Flint J, Kendler KS, Tao M. Perceived parenting and risk for major depression in Chinese women. Psychol Med 2012; 42:921-930. [PMID: 21943491 PMCID: PMC3315781 DOI: 10.1017/s0033291711001942] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2011] [Revised: 08/24/2011] [Accepted: 08/30/2011] [Indexed: 12/02/2022]
Abstract
BACKGROUND In Western countries, a history of major depression (MD) is associated with reports of received parenting that is low in warmth and caring and high in control and authoritarianism. Does a similar pattern exist in women in China? METHOD Received parenting was assessed by a shortened version of the Parental Bonding Instrument (PBI) in two groups of Han Chinese women: 1970 clinically ascertained cases with recurrent MD and 2597 matched controls. MD was assessed at personal interview. RESULTS Factor analysis of the PBI revealed three factors for both mothers and fathers: warmth, protectiveness, and authoritarianism. Lower warmth and protectiveness and higher authoritarianism from both mother and father were significantly associated with risk for recurrent MD. Parental warmth was positively correlated with parental protectiveness and negatively correlated with parental authoritarianism. When examined together, paternal warmth was more strongly associated with lowered risk for MD than maternal warmth. Furthermore, paternal protectiveness was negatively and maternal protectiveness positively associated with risk for MD. CONCLUSIONS Although the structure of received parenting is very similar in China and Western countries, the association with MD is not. High parental protectiveness is generally pathogenic in Western countries but protective in China, especially when received from the father. Our results suggest that cultural factors impact on patterns of parenting and their association with MD.
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Affiliation(s)
- J. Gao
- Zhejiang Traditional Chinese Medical Hospital, Hangzhou Zhejiang, P.R. China
| | - Y. Li
- Wellcome Trust Centre for Human Genetics, Oxford, UK
| | - Y. Cai
- Fudan University affiliated Huashan Hospital, Shanghai, P.R. China
| | - J. Chen
- Shanghai Jiao Tong University School of Medicine affiliated Shanghai Mental Health Centre, Shanghai, P.R. China
| | - Y. Shen
- Shanghai Tongji University affiliated Tongji Hospital, Shanghai, P.R. China
| | - S. Ni
- Nanjing Brain Hospital, Nanjing, Jiangsu, P.R. China
| | - Y. Wei
- No. 4 Affiliated Hospital of Jiangsu University, Zhenjiang, Jiangsu, P.R. China
| | - Y. Qiu
- Second Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, Zhe Jiang, P.R. China
| | - X. Zhu
- Zhejiang Traditional Chinese Medical Hospital, Hangzhou Zhejiang, P.R. China
| | - Y. Liu
- Tianjin Anding Hospital, Hexi District, Tianjin, P.R. China
| | - C. Lu
- Shandong Mental Health Center, Jinan, Shandong, P.R. China
| | - C. Chen
- No. 1 Hospital of Medical College of Xian Jiaotong University, Xi'an, Shaanxi, P.R. China
| | - Q. Niu
- No. 1 Hospital of Zhengzhou University, Zhengzhou, Henan, P.R. China
| | - C. Tang
- No. 1 Mental Health Center Affiliated Harbin Medical University, Nangang District, Harbin, Heilongjiang, P.R. China
| | - Y. Yang
- Mental Health Center of West China Hospital of Sichuan University, Wu Hou District, Chengdu, Sichuan, P.R. China
| | - Q. Wang
- Beijing Anding Hospital, Capital Medical University, Xicheng District, Beijing, P.R. China
| | - W. Cui
- Hebei Mental Health Center, Baoding, Hebei, P.R. China
| | - J. Xia
- Shengjing Hospital of China Medical University, Heping District, Shenyang, Liaoning, P.R. China
| | - T. Liu
- Shenzhen Kangning Hospital, Luo Hu, Shenzhen, P.R. China
| | - J. Zhang
- No. 3 Affiliated Hospital of Sun Yat-sen University, Tian He District, Guangzhou, Guangdong, P.R. China
| | - B. Zhao
- No. 1 Hospital of Shanxi Medical University, Taiyuan, Shanxi, P.R. China
| | - Z. Guo
- Mental Hospital of Jiangxi Province, Nanchang, Jiangxi, P.R. China
| | - J. Pan
- The First Affiliated Hospital of Jinan University, Tian He District, Guangzhou, P.R. China
| | - H. Chen
- Wuhan Mental Health Center, Wuhan, P.R. China
| | - Y. Luo
- No. 3 Hospital of Heilongjiang Province, Beian, Heilongjiang, P.R. China
| | - L. Sun
- Jilin Brain Hospital, Siping, Jilin, P.R. China
| | - X. Xiao
- The First Hospital of China Medical University, He Ping District, Shenyang, P.R. China
| | - Q. Chen
- Dalian No. 7 People's Hospital and Dalian Mental Health Center, Gan Jing Zi District, Dalian, P.R. China
| | - X. Zhao
- The First Hospital of Hebei Medical University, Shijiazhuang, P.R. China
| | - F. He
- Lanzhou University Second Hospital, Second Clinical Medical College of Lanzhou University, Lanzhou, Gansu Province, P.R. China
| | - L. Lv
- Psychiatric Hospital of Henan Province, Xinxiang, Henan, P.R. China
| | - L. Guo
- The Fourth Military Medical University affiliated Xijing Hospital, Xi'an, Shaanxi, P.R. China
| | - L. Liu
- No. 4 People's Hospital of Liaocheng, Liaocheng, Shandong, P.R. China
| | - H. Li
- Guangzhou Brain Hospital/Guangzhou Psychiatric Hospital, Fang Cun Da Dao, Li Wan District, Guangzhou, P.R. China
| | - S. Shi
- Virginia Commonwealth University, Department of Psychiatry, Virginia Institute for Psychiatric and Behavioral Genetics, Richmond, VA, USA
| | - J. Flint
- Wellcome Trust Centre for Human Genetics, Oxford, UK
| | - K. S. Kendler
- Virginia Commonwealth University, Department of Psychiatry, Virginia Institute for Psychiatric and Behavioral Genetics, Richmond, VA, USA
| | - M. Tao
- Second Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, Zhe Jiang, P.R. China
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Xu Y, Xu Q, Liu F, Ni S, WU F, Ye X, Mougin B, Meng X, Du X, Cai S. Peripheral blood mRNA signature for colorectal cancer screening. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.e14030] [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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Xu Y, Ni S, Xu Q, Liu F, Wu F, Ye X, Meng X, Mougin B, Du X, Cai S. Use of peripheral blood mRNA signatures to distinguish colorectal cancer patients from colonoscopy-negative patients. J Clin Oncol 2010. [DOI: 10.1200/jco.2010.28.15_suppl.10564] [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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23
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Ni S, Gaggar A, Di Paolo N, Li ZY, Liu Y, Strauss R, Sova P, Morihara J, Feng Q, Kiviat N, Touré P, Sow PS, Lieber A. Evaluation of adenovirus vectors containing serotype 35 fibers for tumor targeting. Cancer Gene Ther 2006; 13:1072-81. [PMID: 16874361 DOI: 10.1038/sj.cgt.7700981] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
There is growing evidence from in vitro studies that subgroup B adenoviruses (Ad) can overcome the limitations in safety and tumor transduction efficiency seen with commonly used subgroup C serotype 5-based vectors. In this study, we confirm that the expression level of the B-group Ad receptor, CD46, correlates with the grade of malignancy of cervical cancer in situ. We also demonstrate the in vivo properties of Ad5-based vectors that contain the B-group Ad serotype 35 fiber (Ad5/35) in transgenic mice that express CD46 in a pattern and at a level similar to humans. Upon intravenous and intraperitoneal injection, an Ad5/35 vector did not efficiently transduce normal tissue, but was able to target metastatic or intraperitoneal tumors that express CD46 at levels comparable to human tumors. When an oncolytic Ad5/35-based vector was employed, in both tumor models antitumor effects were observed. Furthermore, injection of Ad5/35 vectors into CD46 transgenic mice caused less innate toxicity than Ad5 vectors. Our data demonstrate that Ad vectors that target CD46 offer advantages over Ad5-based vectors for treatment of cancer.
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Affiliation(s)
- S Ni
- Division of Medical Genetics, Department of Medicine, University of Washington, Seattle, WA 98195, USA
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Guo PS, Sun Z, Ni S, Chen YW, Cao ZY. Improvement of field emission properties from screen-printed CNTs cathodes by heat treatment in a C2H2/H2 gas mixture. SURF INTERFACE ANAL 2006. [DOI: 10.1002/sia.2317] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Teal HE, Ni S, Xu J, Finkelstein LD, Cheng AM, Paulson RF, Feng GS, Correll PH. GRB2-mediated recruitment of GAB2, but not GAB1, to SF-STK supports the expansion of Friend virus-infected erythroid progenitor cells. Oncogene 2005; 25:2433-43. [PMID: 16314834 DOI: 10.1038/sj.onc.1209288] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Friend virus induces the development of erythroleukemia in mice through the interaction of a viral glycoprotein, gp55, with a truncated form of the Stk receptor tyrosine kinase, short form-Stk (Sf-Stk), and the EpoR. We have shown previously that the ability of Sf-Stk to participate in the transformation of Friend virus-infected cells requires the kinase activity and Grb2-binding site of Sf-Stk. Here we show that Grb2 heterozygous mice exhibit decreased susceptibility to Friend erythroleukemia and that expansion of erythroid progenitors in response to infection requires the C-terminal SH3 domain of Grb2. A fusion protein in which the Grb2-binding site in Sf-Stk is replaced by Gab2, supports the growth of progenitors from mice lacking Sf-Stk, whereas a Sf-Stk/Gab1 fusion protein does not. Gab2 is expressed in spleens from Friend virus-infected mice, co-immunoprecipitates with Sf-Stk and is tyrosine phosphorylated in the presence of Sf-Stk. Mice with a targeted deletion in Gab2 are less susceptible to Friend erythroleukemia and the expansion of erythroid progenitor cells in response to infection can be rescued by expression of Gab2, but not Gab1. Taken together, these data indicate that a Sf-Stk/Grb2/Gab2 complex mediates the growth of primary erythroid progenitor cells in response to Friend virus.
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Affiliation(s)
- H E Teal
- Department of Veterinary and Biomedical Science, Center for Molecular Immunology and Infectious Disease, The Pennsylvania State University, University Park, PA 16802-3500, USA
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Abstract
Seismologists have known for many years that the lowermost mantle of the Earth is complex. Models based on observed seismic phases sampling this region include relatively sharp horizontal discontinuities with strong zones of anisotropy, nearly vertical contrasts in structure, and small pockets of ultralow velocity zones (ULVZs). This diversity of structures is beginning to be understood in terms of geodynamics and mineral physics, with dense partial melts causing the ULVZs and a postperovskite solid-solid phase transition producing regional layering, with the possibility of large-scale variations in chemistry. This strong heterogeneity has significant implications on heat transport out of core, the evolution of the magnetic field, and magnetic field polarity reversals.
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Affiliation(s)
- D Helmberger
- Seismological Laboratory, California Institute of Technology, Pasadena, CA 91125, USA.
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Ni S, Wang T, Chen Y. [The expression of BDNF and NT-3 in dorsal root ganglion following peripheral and central axotomy--an immunohistochemical study]. Hua Xi Yi Ke Da Xue Xue Bao 2001; 32:350-2. [PMID: 12536560] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
Abstract
OBJECTIVE To explore the expression of brain-derived neurotrophic factor (BDNF) and neurotrophin-3(NT-3) in dorsal root ganglion (DRG) following peripheral and central axotomy. METHODS Fifteen male adult cats were divided into intact group, peripheral axotomy group and central axotomy group. The ten cats of the latter two groups were subjected to unilateral peripheral cut and central processes cut respectively. The animals were allowed to survive 4 days long; L5 DRG was taken from each animal and made into frozen sections 20 microns thick. The sections were stained using antisera of BDNF and NT-3 respectively by immunohistchemical ABC method. The neuronal numbers of BDNF and NT-3 of the three groups were counted and compared. RESULTS The positive products of BDNF were mainly distributed in small to medium sized neurons (13-57 microns) while those of NT-3 were mainly in large sized neurons (57-100 microns). The neuronal numbers of BDNF and NT-3 in peripheral and central axotomy groups (24.1 +/- 3.5, 29.4 +/- 5.2; 19.4 +/- 2.4, 20.2 +/- 1.9) increased significantly than those of intact group (12.1 +/- 2.2, 13.3 +/- 2.9), P < 0.01. And the neuronal numbers of BDNF and NT-3 in peripheral axotomy groups were more than those of central axotomy group(P < 0.05). CONCLUSION The results indicate that peripheral axotomy and central axotomy lead to the increase of the expression of BDNF and NT-3 in DRG neurons. And the effect of peripheral axotomy is greater than that of central axotomy.
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Affiliation(s)
- S Ni
- Department of Neurosurgery, No. 1 Affiliated Hospital of Kunming Medical College, Kunming 650032, China
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Abstract
Urban stormwater runoff is being recognized as a substantial source of pollutants to receiving waters. A number of investigators have found significant levels of metals in runoff from urban areas, especially in highway runoff. As an initiatory study, this work estimates lead, copper, cadmium, and zinc loadings from various sources in a developed area utilizing information available in the literature, in conjunction with controlled experimental and sampling investigations. Specific sources examined include building siding and roofs; automobile brakes, tires, and oil leakage; and wet and dry atmospheric deposition. Important sources identified are building siding for all four metals, vehicle brake emissions for copper and tire wear for zinc. Atmospheric deposition is an important source for cadmium, copper, and lead. Loadings and source distributions depend on building and automobile density assumptions and the type of materials present in the area examined. Identified important sources are targeted for future comprehensive mechanistic studies. Improved information on the metal release and distributions from the specific sources, along with detailed characterization of watershed areas will allow refinements in the predictions.
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Affiliation(s)
- A P Davis
- Department of Civil and Environmental Engineering, University of Maryland, College Park 20742, USA.
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Abstract
Selectively replicating viruses hold promise as anticancer agents. To eliminate the tumor, these viruses must efficiently spread throughout the tumor and induce oncolysis. We hypothesized that viral release and spread could be supported by apoptosis induced after assembly of de novo-produced virions in tumor cells. As a model to test this, we employed an adenovirus vector that replicated in human tumor cell lines. Expression of a dominant-negative I-kappaB from this vector sensitized tumor cells to recombinant human tumor necrosis factor alpha (TNF-alpha)-mediated apoptosis. We found that apoptosis induced during viral DNA replication compromised virus production, whereas apoptosis induced after virion assembly enhanced viral release from infected cells and dissemination. Electron microscopy demonstrated that viral particles were associated with or included in apoptotic bodies whose phagocytosis by neighboring cells provides a potential means for viral spread. Apoptosis induced after viral replication also supported spread in vivo, in subcutaneous tumors or liver metastases, resulting in a delay of tumor growth. Our findings could be applicable to other selectively replicating viruses or antitumor strategies that involve application of proapoptotic or cytolytic agents.
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Affiliation(s)
- J Mi
- Division of Medical Genetics, Department of Medicine, University of Washington, 1705 NE Pacific St., Seattle, WA 98195, USA
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30
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Affiliation(s)
- M Haran
- Department of Aged Care & Rehabilitation Medicine, Royal North Shore Hospital, St Leonards, New South Wales, Australia.
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Steinwaerder DS, Carlson CA, Otto DL, Li ZY, Ni S, Lieber A. Tumor-specific gene expression in hepatic metastases by a replication-activated adenovirus vector. Nat Med 2001; 7:240-3. [PMID: 11175857 DOI: 10.1038/84696] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
Clinical applications of tumor gene therapy require tumor-specific delivery or expression of therapeutic genes in order to maximize the oncolytic index and minimize side effects. This study demonstrates activation of transgene expression exclusively in hepatic metastases after systemic application of a modified first-generation (E1A/E1B-deleted) adenovirus vector (AdE1-) in mouse tumor models. The discrimination between tumors and normal liver tissue is based on selective DNA replication of AdE1- vectors in tumor cells. This new AdE1- based vector system uses homologous recombination between inverted repeats to mediate precise rearrangements within the viral genome. As a result of these rearrangements, a promoter is brought into conjunction with a reporter gene creating a functional expression cassette. Genomic rearrangements are dependent upon viral DNA replication, which in turn occurs specifically in tumor cells. In a mouse tumor model with liver metastases derived from human tumor cells, a single systemic administration of replication activated AdE1- vectors achieved transgene expression in every metastasis, whereas no extra-tumoral transgene induction was observed. Here we provide a new concept for tumor-specific gene expression that is also applicable for other conditionally replicating adenovirus vectors.
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Affiliation(s)
- D S Steinwaerder
- Division of Medical Genetics, Department of Medicine, University of Washington, Seattle, Washington, USA
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32
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Wang S, Xie F, Ni S. [Synthesis and spectroscopic studies of new N-functionalized macrocyclic compounds and complex]. Guang Pu Xue Yu Guang Pu Fen Xi 2000; 20:44-48. [PMID: 12953447] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 05/24/2023]
Abstract
Three new N-functionalized tetraazamacrocyclic compounds, C-messo-5,5,7,12,12,14-hexamethyl-1,4,8,11-tetraazacyclotetradecane- N,N',N",N'"-tetrakis (ethyl acetate) (A), C-messo-5,5,7,12,12,14-hexamethyl-1,4,8,11-tetra- azacyclotetradecane-N,N,'N",N'"-tetraacetic acid (H4L) and the hydrobromide of H4L have been synthesized and the complex Na2[NiL].2C2H5OH has been prepared as well. The macroyclic compounds and the complex have been studied by electronic spectrum, infrared spectrum, 1H NMR, MS and elemental analysis.
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Affiliation(s)
- S Wang
- Chemical Engineering Department, East China Institute of Metallurgy, 243002 Maanshan
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Xu N, Pasa-Tolić L, Smith RD, Ni S, Thrall BD. Electrospray ionization-mass spectrometry study of the interaction of cisplatin-adducted oligonucleotides with human XPA minimal binding domain protein. Anal Biochem 1999; 272:26-33. [PMID: 10405289 DOI: 10.1006/abio.1999.4143] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Nucleotide excision repair (NER) is the process responsible for eliminating most ultraviolet (UV) radiation damage from DNA, as well as base alterations caused by a variety of mutagens. The xeroderma pigmentosum group A complementing protein (XPA) is believed to be involved in the early step of NER by recognizing and binding damaged DNA. Recent work has suggested that electrospray ionization-mass spectrometry (ESI-MS) can be an effective tool for the study of protein-DNA complexes. We have used ESI-Fourier transform ion cyclotron resonance (FTICR) mass spectrometry to examine the cisplatin-adducted oligonucleotide and its interaction with the human XPA minimal binding domain (XPA-MBD). High-resolution FTICR experiments of the binding products showed that both double-stranded damaged 20-mer and double-stranded undamaged 20-mer formed 1:1 noncovalent complexes with XPA-MBD. A 2:1 binding stoichiometry complex was also observed between XPA-MBD and double-stranded damaged 20-mer. Competitive binding experiments indicated only slightly preferential binding of XPA-MBD with the double-stranded damaged 20-mer compared to the undamaged 20-mer. The results demonstrate that ESI-FTICR mass spectrometry provides a fast and efficient approach for characterizing weak protein-DNA interactions such as the binding between XPA-MBD and a 20-mer oligonucleotide system.
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Affiliation(s)
- N Xu
- Environmental Molecular Sciences Laboratory, Pacific Northwest National Laboratory, Richland, Washington 99352, USA
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Ran W, Ni S, Fan X. [Applied anatomy of insular skin flap of nasolabial groove with retrograde superior labial artery]. Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 1998; 12:374-5. [PMID: 10437096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Abstract
In order to study the feasibiliy of the insular skin flap of the nasolabial groove with the retrograde superior labial artery, 8 adult cadavers were dissected and the relation between the superior labial artery and the skin of nasolabial groove was observed. The result revealed that superior labial artery was one of the branches of the facial artery and could be found in every cadaver. The diameter of the artery was 0.8 +/- 0.1 mm and the length was about 90 mm. The left and right facial arteries were connected with each other in the mid-line in the formation of the arcuate artery. The arcuate artery lay within the submucous tissue beyond the vermilion border about 6 mm. The concomitant veins were constant. If the facial artery being sectioned was beyond its initial site of superior labial artery, the skin of nasolabial groove on the same side could receive blood supply from contralateral supperior labial artery. The conclusion was that the insular skin flap of the nasolabial groove with the retrograde superior labial artery could be used in patients, because it had support from anatomical research.
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Affiliation(s)
- W Ran
- Department of Plastic Surgery, Hei Longjiang Provincial Hospital, P.R. China
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Hess NJ, Buchko GW, Conradson SD, Espinosa FJ, Ni S, Thrall BD, Kennedy MA. Human nucleotide excision repair protein XPA: extended X-ray absorption fine-structure evidence for a metal-binding domain. Protein Sci 1998; 7:1970-5. [PMID: 9761477 PMCID: PMC2144156 DOI: 10.1002/pro.5560070912] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The ubiquitous, multi-enzyme, nucleotide excision repair (NER) pathway is responsible for correcting a wide range of chemically and structurally distinct DNA lesions in the eukaryotic genome. Human XPA, a 31 kDa, zinc-associated protein, is thought to play a major NER role in the recognition of damaged DNA and the recruitment of other proteins, including RPA, ERCC1, and TFIIH, to repair the damage. Sequence analyses and genetic evidence suggest that zinc is associated with a C4-type motif, C105-X2-C108-X17-C126-X2-C129, located in the minimal DNA binding region of XPA (M98-F219). The zinc-associated motif is essential for damaged DNA recognition. Extended X-ray absorption fine structure (EXAFS) spectra collected on the zinc associated minimal DNA-binding domain of XPA (ZnXPA-MBD) show directly, for the first time, that the zinc is coordinated to the sulfur atoms of four cysteine residues with an average Zn-S bond length of 2.34+/-0.01 A. XPA-MBD was also expressed in minimal medium supplemented with cobalt nitrate to yield a blue-colored protein that was primarily (>95%) cobalt associated (CoXPA-MBD). EXAFS spectra collected on CoXPA-MBD show that the cobalt is also coordinated to the sulfur atoms of four cysteine residues with an average Co-S bond length of 2.33+/-0.02 A.
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Affiliation(s)
- N J Hess
- Pacific Northwest National Laboratories, Biogeochemistry Resources, Molecular Biosciences Department, Richland, Washington 99352, USA
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36
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Buchko GW, Ni S, Thrall BD, Kennedy MA. Structural features of the minimal DNA binding domain (M98-F219) of human nucleotide excision repair protein XPA. Nucleic Acids Res 1998; 26:2779-88. [PMID: 9592168 PMCID: PMC147584 DOI: 10.1093/nar/26.11.2779] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
XPA, an essential protein in nucleotide excision repair (NER), interacts with damaged DNA and other proteins (RPA, ERCC1 and TFIIH) to remove a wide variety of chemically and structurally distinct DNA lesions from the eukaryotic genome. To understand the structural basis for the role of XPA in the repair process, the structure of the minimal DNA binding domain of human XPA [XPA-MBD (M98-F219)] was studied by NMR spectroscopy. A three-dimensional structure for XPA-MBD was generated using distance geometry and simulated annealing methods from NOE-based distance restraints, hydrogen bond and Zn-S distance restraints, and dihedral restraints. The structure calculations indicate that XPA-MBD contains elements of well-defined secondary structure interspaced with disordered loops organized into two non-interactive sub-domains: a zinc-binding core (D101-K137) and a loop-rich domain (L138-F219). The zinc-associated core contains an antiparallel beta-sheet (Y102-C105 and K110-M113) and an alpha-helix (C126-K137) separated by a poorly defined turn, reminiscent of the structure of the zinc-binding domain of the chicken erythroid transcription factor GATA-1 when bound to its cognate DNA sequence. The loop-rich domain contains a triple-strand antiparallel beta-sheet (L138-T140, L182-M178 and K163-K167), three loops (K151-L162, N169-D177 and Q208-F219) and three alpha-helices (K141-L150, K183-W194 and Q197-R207). The XPA-MBD structure is discussed in terms of known functions: binding single- and double-stranded DNA and binding RPA.
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Affiliation(s)
- G W Buchko
- Pacific Northwest National Laboratories, Environmental Molecular Sciences Laboratory, Richland, WA 99352, USA
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Louie TM, Ni S, Xun L, Mohn WW. Purification, characterization and gene sequence analysis of a novel cytochrome c co-induced with reductive dechlorination activity in Desulfomonile tiedjei DCB-1. Arch Microbiol 1997; 168:520-7. [PMID: 9385144 DOI: 10.1007/s002030050530] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The sulfate-reducing bacterium, Desulfomonile tiedjei DCB-1, conserves energy for growth from reductive dechlorination of 3-chlorobenzoate via halorespiration. To understand this respiratory process better, we examined electron carriers from different cellular compartments of D. tiedjei. A 50-kDa cytochrome from the membrane fraction was found to be co-induced with dechlorination activity. This inducible cytochrome was extracted from the membrane fractions by Tris-HCl buffer containing ammonium sulfate at 35% saturation and was purified to electrophoretic homogeneity by phenyl superose, Mono Q, and hydroxyapatite chromatography. The purified cytochrome had a high-spin absorption spectrum. In a pH titration experiment, the absorption spectrum of the inducible cytochrome shifted to low spin at pH 13.2. The midpoint potential of the inducible cytochrome at pH 7.0 was -342 mV. The NH2-terminal amino acid sequence of the inducible cytochrome was determined and was used to obtain inverse PCR products containing the sequence of the gene encoding the inducible cytochrome. The ORF was 1398 bp and coded for a protein of 52.6 kDa. Two c-type heme-binding domains were identified in the COOH-terminal half of the protein. A putative signal peptide of 26 residues was found at the NH2-terminal end. The protein sequence was not found to have substantial sequence similarity to any other sequence in GenBank. We conclude that this is a c-type cytochrome substantially different from previously characterized c-type cytochromes.
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Affiliation(s)
- T M Louie
- Department of Microbiology and Immunology, University of British Columbia, Vancouver, Canada
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Buchko GW, Ni S, Thrall BD, Kennedy MA. Human nucleotide excision repair protein XPA: expression and NMR backbone assignments of the 14.7 kDa minimal damaged DNA binding domain (Met98-Phe219). J Biomol NMR 1997; 10:313-314. [PMID: 9390412 DOI: 10.1023/a:1018321319578] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/22/2023]
Affiliation(s)
- G W Buchko
- Pacific Northwest National Laboratory, Molecular Bioscience, Department, Richland, WA 99352, USA
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Ni S, Fredrickson JK, Xun L. Purification and characterization of a novel 3-chlorobenzoate-reductive dehalogenase from the cytoplasmic membrane of Desulfomonile tiedjei DCB-1. J Bacteriol 1995; 177:5135-9. [PMID: 7665493 PMCID: PMC177294 DOI: 10.1128/jb.177.17.5135-5139.1995] [Citation(s) in RCA: 89] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Although reductive dehalogenation by anaerobic microorganisms offers great potential for the degradation of halocarbons, little is known about the biochemical mechanisms involved. It has previously been demonstrated that the dehalogenase activity involved in 3-chlorobenzoate dehalogenation by Desulfomonile tiedjei DCB-1 is present in the membrane fraction of the cell extracts. We report herein the purification of a 3-chlorobenzoate-reductive dehalogenase from the cytoplasmic membrane of D. tiedjei DCB-1. The dehalogenase activity was monitored by the conversion of 3-chlorobenzoate to benzoate with reduced methyl viologen as a reducing agent. The membrane fraction of the cell extracts was obtained by ultracentrifugation, and the membrane proteins were solubilized with either the detergent CHAPS (3-[(3-cholamidopropyl)-dimethyl-ammonio]-1-propanesulfonate) or Triton X-100 in the presence of glycerol. The solubilized dehalogenase was purified by ammonium sulfate fractionation and a combination of anion exchange, hydroxyapatite, and hydrophobic interaction chromatographies. This procedure yielded about 7% of the total dehalogenase activity with a 120-fold increase in specific activity. Sodium dodecyl sulfate-polyacrylamide gel electrophoresis showed that the purified dehalogenase consisted of two subunits with molecular weights of 64,000 and 37,000. The enzyme converted 3-chlorobenzoate to benzoate at its highest specific activity in 10 mM potassium phosphate buffer (pH 7.2) at 38 degrees C. The enzyme was yellow and probably a heme protein. The enzyme had an adsorbance peak at 408 nm. The dithionite-reduced enzyme displayed absorbance peaks at 416, 522, and 550 nm. The dithionite-reduced enzyme was able to complex with carbon monoxide. The nature of the heme chromophore is currently unknown.
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Affiliation(s)
- S Ni
- Environmental Microbiology Group, Pacific Northwest Laboratory, Richland, Washington 99352, USA
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Ni S, Boone JE, Boone DR. Potassium extrusion by the moderately halophilic and alkaliphilic methanogen methanolobus taylorii GS-16 and homeostasis of cytosolic pH. J Bacteriol 1994; 176:7274-9. [PMID: 7961499 PMCID: PMC197116 DOI: 10.1128/jb.176.23.7274-7279.1994] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.1] [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: 01/28/2023] Open
Abstract
Methanolobus taylorii GS-16, a moderately halophilic and alkaliphilic methanogen, grows over a wide pH range, from 6.8 to 9.0. Cells suspended in medium with a pH above 8.2 reversed their transmembrane pH gradient (delta pH), making their cytosol more acidic than the medium. The decreased energy in the proton motive force due to the reversed delta pH was partly compensated by an increased electric membrane potential (delta psi). The cytosolic acidification by M. taylorii at alkaline pH values was accompanied by K+ extrusion. The cytosolic K+ concentration was 110 mM in cells suspended at pH 8.7, but it was 320 mM in cells suspended at neutral pH values. High external K+ concentrations (210 mM or higher) inhibited the growth of M. taylorii at alkaline pH values, perhaps by preventing K+ extrusion. Cells suspended at pH 8.5 and 300 mM external K+ failed to acidify their cytosol. The key observation indicative of the involvement of K+ transport in cytosolic acidification was that valinomycin (0.8 microM), a K+ uniporter, inhibited the growth of M. taylorii only at alkaline pH values. Experiments with resting cells indicated that at alkaline pH values valinomycin uncoupled catabolic reactions from ATP synthesis. Thus, K+/H+ antiport activity was proposed to account for the K+ extrusion and the uncoupling effect of valinomycin at alkaline pH values. Such antiport activity was demonstrated by the sharp drop in pH of the bulk medium of the cell suspension upon the addition of 0.1 M KCl. The antiporter appeared to be active only at alkaline pH values, which was in accordance with a possible role in pH homeostasis by M. taylorii growing at alkaline pH values.
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Affiliation(s)
- S Ni
- Department of Chemistry, Biochemistry, and Molecular Biology, Oregon Graduate Institute of Science & Technology, Portland 97291-1000
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Ni S, Woese CR, Aldrich HC, Boone DR. Transfer of Methanolobus siciliae to the genus Methanosarcina, naming it Methanosarcina siciliae, and emendation of the genus Methanosarcina. Int J Syst Bacteriol 1994; 44:357-9. [PMID: 11536640 DOI: 10.1099/00207713-44-2-357] [Citation(s) in RCA: 25] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
A sequence analysis of the 16S rRNA of Methanolobus siciliae T4/M(T) (T = type strain) showed that this strain is closely related to members of the genus Methanosarcina, especially Methanosarcina acetivorans C2A(T). Methanolobus siciliae T4/M(T) and HI350 were morphologically more similar to members of the genus Methanosarcina than to members of the genus Methanolobus in that they both formed massive cell aggregates with pseudosarcinae. Thus, we propose that Methanolobus siciliae should be transferred to the genus Methanosarcina as Methanosarcina siciliae.
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Affiliation(s)
- S Ni
- Department of Chemistry, Biochemistry and Molecular Biology, Oregon Graduate Institute of Science & Technology, Portland 97291-1000, USA
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Ni S. Population pressures on resources and the environment. Earthwatch 1989:8-9. [PMID: 12291353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 04/19/2023]
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