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Teng YQ, Du T, Tian R, Liu ZY, Zhang SY. [Genetics of coronary artery disease: research progress and prospect of clinical translation]. Zhonghua Xin Xue Guan Bing Za Zhi 2021; 49:733-738. [PMID: 34256445 DOI: 10.3760/cma.j.cn112148-20210331-00286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Y Q Teng
- Department of Cardiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China Department of Basic Medical Sciences, Tsinghua University School of Medicine, Beijing 100084, China
| | - T Du
- Department of Cardiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China Department of Basic Medical Sciences, Tsinghua University School of Medicine, Beijing 100084, China
| | - R Tian
- Department of Cardiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Z Y Liu
- Department of Cardiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - S Y Zhang
- Department of Cardiology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China Department of Basic Medical Sciences, Tsinghua University School of Medicine, Beijing 100084, China
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Xie Y, Mi L, Zheng W, Ping L, Lin N, Tu M, Zhang C, Ying Z, Liu W, Deng L, W M, Du T, Tang Y, Wang X, Zhu J, Song Y. CAMRELIZUMAB COMBINED WITH GEMOX IN PATIENTS WITH RELAPSED OR REFRACTORY HODGKIN LYMPHOMA. Hematol Oncol 2021. [DOI: 10.1002/hon.104_2880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Y. Xie
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education) Peking University Cancer Hospital & Institute Department of lymphoma beijing China
| | - L. Mi
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education) Peking University Cancer Hospital & Institute Department of lymphoma beijing China
| | - W. Zheng
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education) Peking University Cancer Hospital & Institute Department of lymphoma beijing China
| | - L. Ping
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education) Peking University Cancer Hospital & Institute Department of lymphoma beijing China
| | - N. Lin
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education) Peking University Cancer Hospital & Institute Department of lymphoma beijing China
| | - M. Tu
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education) Peking University Cancer Hospital & Institute Department of lymphoma beijing China
| | - C. Zhang
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education) Peking University Cancer Hospital & Institute Department of lymphoma beijing China
| | - Z. Ying
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education) Peking University Cancer Hospital & Institute Department of lymphoma beijing China
| | - W. Liu
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education) Peking University Cancer Hospital & Institute Department of lymphoma beijing China
| | - L. Deng
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education) Peking University Cancer Hospital & Institute Department of lymphoma beijing China
| | - M. W
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education) Peking University Cancer Hospital & Institute Department of lymphoma beijing China
| | - T. Du
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education) Peking University Cancer Hospital & Institute Department of lymphoma beijing China
| | - Y. Tang
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education) Peking University Cancer Hospital & Institute Department of lymphoma beijing China
| | - X. Wang
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education) Peking University Cancer Hospital & Institute Department of lymphoma beijing China
| | - J. Zhu
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education) Peking University Cancer Hospital & Institute Department of lymphoma beijing China
| | - Y. Song
- Key laboratory of Carcinogenesis and Translational Research (Ministry of Education) Peking University Cancer Hospital & Institute Department of lymphoma beijing China
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Teng YQ, Du T, Tian R, Zhang ZY, Liu ZY, Zhang SY. [Inherited premature coronary artery disease: classification and research progress]. Zhonghua Nei Ke Za Zhi 2021; 60:578-584. [PMID: 34058819 DOI: 10.3760/cma.j.cn112138-20200612-00582] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Y Q Teng
- Department of Cardiology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China Department of Basic Medical Sciences, Tsinghua University School of Medicine, Beijing 100084, China
| | - T Du
- Department of Cardiology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China Department of Basic Medical Sciences, Tsinghua University School of Medicine, Beijing 100084, China
| | - R Tian
- Department of Cardiology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Z Y Zhang
- Department of Cardiology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Z Y Liu
- Department of Cardiology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - S Y Zhang
- Department of Cardiology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China Department of Basic Medical Sciences, Tsinghua University School of Medicine, Beijing 100084, China
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Shmuylovich L, Mishra D, Hurbon H, Yu A, Du T, Wang T, Berezin M. 843 Seeing water in the skin: Hyperspectral imaging in the short-wave infrared. J Invest Dermatol 2020. [DOI: 10.1016/j.jid.2020.03.859] [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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Deras I, Du T, Zhao C, Haseley N, Yazdanparast A, Jiang T, Mentzer A, Purdy A, Crain B, Echegaray C, Lee D, Lee J, Silhavy J, O’Brien K, Vijayaraghavan R, Garcia R, Haigis R, Pawlowski T, Dockter J. Clinical and analytical accuracy of a 523 gene panel next-generation sequencing (NGS) assay on formalin-fixed paraffin-embedded (FFPE) solid tumour samples. Ann Oncol 2019. [DOI: 10.1093/annonc/mdz257.005] [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: 11/13/2022] Open
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Huang Y, Wang J, Abe A, Wang Y, Du T, Huang C. A theoretical model to estimate inactivation effects of OH radicals on marine Vibrio sp. in bubble-shock interaction. Ultrason Sonochem 2019; 55:359-368. [PMID: 30852154 DOI: 10.1016/j.ultsonch.2018.10.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Revised: 09/07/2018] [Accepted: 10/02/2018] [Indexed: 06/09/2023]
Abstract
A theoretical model for estimating inactivation effects on marine Vibrio sp. is developed from the viewpoint of the chemical action of the OH radicals induced by interaction of bubbles with shock waves. It consists of a biological probability model for cell viability and a bubble dynamic model for its collapsing motion due to the shock pressures. The biological probability model is built by defining a sterilized space of the OH radicals. To determine the radius of the sterilized space, the Herring equation is solved in the bubble dynamic model in consideration of the effect of the heat conductivity and mass transportation. Furthermore, the pressure waveform of incident shock wave used in the model is obtained with the pressure measurement. On the other hand, a bio-experiment of marine Vibrio sp. is carried out using a high-voltage power supply in a cylindrical water chamber. Finally, the viability ratio of marine bacteria estimated by the theoretical model is examined under the experimental conditions of this study. In addition, we also discuss the influence of bubble initial size for predicting the inactivation effects.
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Affiliation(s)
- Y Huang
- Key Laboratory for Mechanics in Fluid Solid Coupling System, Institute of Mechanics, Chinese Academy of Sciences, No.15 Beisihuanxi Road, Beijing 100190, China; High School Affiliated to Renmin University of China, Beijing 100080, China
| | - J Wang
- Key Laboratory for Mechanics in Fluid Solid Coupling System, Institute of Mechanics, Chinese Academy of Sciences, No.15 Beisihuanxi Road, Beijing 100190, China; School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, China.
| | - A Abe
- Graduate School of Maritime Sciences, Kobe University, 5-1-1 Fukaeminami-machi, Kobe 658-0022, Japan
| | - Y Wang
- Key Laboratory for Mechanics in Fluid Solid Coupling System, Institute of Mechanics, Chinese Academy of Sciences, No.15 Beisihuanxi Road, Beijing 100190, China; School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, China.
| | - T Du
- Key Laboratory for Mechanics in Fluid Solid Coupling System, Institute of Mechanics, Chinese Academy of Sciences, No.15 Beisihuanxi Road, Beijing 100190, China; School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, China
| | - C Huang
- Key Laboratory for Mechanics in Fluid Solid Coupling System, Institute of Mechanics, Chinese Academy of Sciences, No.15 Beisihuanxi Road, Beijing 100190, China; School of Engineering Science, University of Chinese Academy of Sciences, Beijing 100049, China
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Jiménez A, Araya R, Paniagua D, Camacho-Mora Z, Du T, Golding G, Leandro-Astorga G, Rodríguez C, Quesada-Gómez C. Molecular epidemiology and antimicrobial resistance of Clostridium difficile in a national geriatric hospital in Costa Rica. J Hosp Infect 2018; 99:475-480. [DOI: 10.1016/j.jhin.2018.03.027] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Accepted: 03/22/2018] [Indexed: 12/19/2022]
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Levine KM, Du T, Zhu L, Tasdemir N, Lee AV, Van Houten B, Tseng GC, Oesterreich S. Abstract P1-03-03: Invasive lobular carcinoma and invasive ductal carcinoma differ in immune response, translation efficiency and metabolic rate. Cancer Res 2018. [DOI: 10.1158/1538-7445.sabcs17-p1-03-03] [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
Background
Invasive lobular carcinoma (ILC) is the second most common histological subtype of breast cancer after invasive ductal carcinoma (IDC). ILC differs from IDC in pathologic, molecular, and clinical features. ILC tumors are most often characterized as luminal A by PAM50 analysis, suggestive of an indolent disease. Yet, when matched for receptor status and tumor grade, patients with ILC tend to have worse long-term outcomes than patients with IDC. The main distinguishing molecular feature of ILC is the loss of functional E-cadherin, and yet, beyond that loss, the mechanisms underlying the differences between ILC and IDC are largely unknown. We examined the RNA expression profiles of ILC and IDC tumors to assess if there may be underlying vulnerabilities of ILC tumors to novel therapeutic strategies.
Methods
Differential expression analysis was performed on 159 luminal A (LumA) ILC tumors versus 311 LumA IDC tumors from The Cancer Genome Atlas (TCGA). The METABRIC cohort (65 LumA ILC and 533 LumA IDC) was used as a validation dataset. Pathway enrichment analysis was performed to identify potential differences in biological processes, and these potential differences were then tested in a series of in vitro experiments, using 3 ER+ ILC (MDA-MB-134VI, SUM44PE, and MDA-MB-330) and 3 ER+ IDC (MCF7, T47D, and ZR75.1) cell lines.
Results
Pathway analysis led to the identification of three main signaling differences between LumA ILC and LumA IDC: immune regulation, translation, and metabolism. A series of immune pathways, including Immunological Synapse, Biocarta IL17 pathway, and Response to Wounding were up-regulated in ILC tumors. We examined specific cell type markers, and found that ILC tumors have a higher activity of nearly all immune cell types, including CD4+ T cells, CD8+ T cells, B cells, NK cells, dendritic cells, M1 macrophages, and M2 macrophages. These results were surprising, since ILC tumors have a lower incidence of stromal inflammation, as defined by H&E staining, suggesting a unique immune regulatory mechanism in ILC.
Next, we examined the translational regulation in ILC vs IDC tumors by comparing RNA expression and protein quantities as determined by RPPA analysis. ILC tumors have a lower protein:RNA ratio, suggesting a lower translation efficiency. This was reflected in the RPPA data by lower protein expression of eIF4G, ribosome protein S6 (S6) and p70-S6K in ILC tumors. Phosphorylation of 4E-BP1 (Ser65), eEF2, S6 (Ser235/236, Ser240/244), and mTOR (Ser2448) were also significantly lower in LumA ILCs. This lower translation efficiency was then validated in cell lines by O-propargyl-puromycin treatment.
Finally, the pathway analysis suggested lower rates of metabolism in lobular tumors. Comparative studies of OXPHOS and glycolysis with a Seahorse analyzer confirmed this finding.
Conclusions
ILC tumors have a higher immune activity than IDC tumors, even with lower rates of stromal inflammation, suggesting a potential for differential response to immunotherapy. The lower rates of translation and metabolism, which are general identifiers of tumor dormancy, could enable ILC to escape from cytotoxic therapies, and may play an important role in the late recurrence of ILC.
Citation Format: Levine KM, Du T, Zhu L, Tasdemir N, Lee AV, Van Houten B, Tseng GC, Oesterreich S. Invasive lobular carcinoma and invasive ductal carcinoma differ in immune response, translation efficiency and metabolic rate [abstract]. In: Proceedings of the 2017 San Antonio Breast Cancer Symposium; 2017 Dec 5-9; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2018;78(4 Suppl):Abstract nr P1-03-03.
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Affiliation(s)
- KM Levine
- University of Pittsburgh, Pittsburgh, PA; Tsinghua University, Beijing, China
| | - T Du
- University of Pittsburgh, Pittsburgh, PA; Tsinghua University, Beijing, China
| | - L Zhu
- University of Pittsburgh, Pittsburgh, PA; Tsinghua University, Beijing, China
| | - N Tasdemir
- University of Pittsburgh, Pittsburgh, PA; Tsinghua University, Beijing, China
| | - AV Lee
- University of Pittsburgh, Pittsburgh, PA; Tsinghua University, Beijing, China
| | - B Van Houten
- University of Pittsburgh, Pittsburgh, PA; Tsinghua University, Beijing, China
| | - GC Tseng
- University of Pittsburgh, Pittsburgh, PA; Tsinghua University, Beijing, China
| | - S Oesterreich
- University of Pittsburgh, Pittsburgh, PA; Tsinghua University, Beijing, China
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Wangdi K, Clements ACA, Du T, Nery SV. Spatial and temporal patterns of dengue infections in Timor-Leste, 2005-2013. Parasit Vectors 2018; 11:9. [PMID: 29301546 PMCID: PMC5755460 DOI: 10.1186/s13071-017-2588-4] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Accepted: 12/11/2017] [Indexed: 12/03/2022] Open
Abstract
Background Dengue remains an important public health problem in Timor-Leste, with several major epidemics occurring over the last 10 years. The aim of this study was to identify dengue clusters at high geographical resolution and to determine the association between local environmental characteristics and the distribution and transmission of the disease. Methods Notifications of dengue cases that occurred from January 2005 to December 2013 were obtained from the Ministry of Health, Timor-Leste. The population of each suco (the third-level administrative subdivision) was obtained from the Population and Housing Census 2010. Spatial autocorrelation in dengue incidence was explored using Moran’s I statistic, Local Indicators of Spatial Association (LISA), and the Getis-Ord statistics. A multivariate, Zero-Inflated, Poisson (ZIP) regression model was developed with a conditional autoregressive (CAR) prior structure, and with posterior parameters estimated using Bayesian Markov chain Monte Carlo (MCMC) simulation with Gibbs sampling. Results The analysis used data from 3206 cases. Dengue incidence was highly seasonal with a large peak in January. Patients ≥ 14 years were found to be 74% [95% credible interval (CrI): 72–76%] less likely to be infected than those < 14 years, and females were 12% (95% CrI: 4–21%) more likely to suffer from dengue as compared to males. Dengue incidence increased by 0.7% (95% CrI: 0.6–0.8%) for a 1 °C increase in mean temperature; and 47% (95% CrI: 29–59%) for a 1 mm increase in precipitation. There was no significant residual spatial clustering after accounting for climate and demographic variables. Conclusions Dengue incidence was highly seasonal and spatially clustered, with positive associations with temperature, precipitation and demographic factors. These factors explained the observed spatial heterogeneity of infection. Electronic supplementary material The online version of this article (10.1186/s13071-017-2588-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Kinley Wangdi
- Research School of Population Health, The Australian National University, Canberra, Australia.
| | - Archie C A Clements
- Research School of Population Health, The Australian National University, Canberra, Australia
| | - Tai Du
- ANU Medical School, The Australian National University, Canberra, Australia
| | - Susana Vaz Nery
- Research School of Population Health, The Australian National University, Canberra, Australia
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Du T, Hill L, Ding L, Towbin A, DeJonckheere M, Bennett P, Hagerman N, Varughese A, Pratap J. Gastric emptying for liquids of different compositions in children. Br J Anaesth 2017; 119:948-955. [DOI: 10.1093/bja/aex340] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/28/2017] [Indexed: 02/04/2023] Open
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Du T, Kuang Y. Factors affecting sex ratio of offspring from frozen-thawed embryo transfer cycles of in vitro fertilization/intracytoplasmic sperm injection. Fertil Steril 2017. [DOI: 10.1016/j.fertnstert.2017.07.987] [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: 11/29/2022]
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Shen ZH, Zhao KM, Du T. HOXA10 promotes nasopharyngeal carcinoma cell proliferation and invasion via inducing the expression of ZIC2. Eur Rev Med Pharmacol Sci 2017; 21:945-952. [PMID: 28338202] [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 In this study, we aimed to explore the dysregulated genes in nasopharyngeal carcinoma (NPC) and to investigate the regulative effect of HOXA10 on ZIC2 expression and their involvement in NPC cell proliferation and invasion. MATERIALS AND METHODS Microarray data that compared the transcription profile of NPC tissues and normal tissues was searched in GEO datasets and was re-analyzed. The expression of HOXA10 and ZIC2 mRNA were retrieved in TCGA database. CNE1 and CNE2 cells were used as an in-vitro cell model. Luciferase reporters carrying truncated ZIC2 promoter sequences were generated to verify the predicted HOXA10 binding site. CCK-8 assay and transwell assay were applied to assess cell proliferation and invasion respectively. RESULTS HOXC6, HOXA3, and HOXA10 were upregulated in NPC tissues. Data mining in TCGA database showed that HOXA10, but not HOXC6 or HOXA3 is positively correlated to ZIC2 expression. Enforced HOXA10 expression significantly elevated ZIC2 expression at both mRNA and protein levels in both CNE1 and CNE2 cells. HOXA10 can directly bind to the promoter of ZIC2 and upregulate ZIC2 transcription. ZIC2 knockdown significantly reduced cell proliferation and invasion capability of CNE1 cells and also partly abrogated the effect of HOXA10 overexpression on enhancing cell proliferation and invasion. CONCLUSIONS Both HOXA10 and ZIC2 are upregulated in NPC tissues compared to the normal tissues. HOXA10 can increase ZIC2 expression via binding to the ZIC2 promoter. Functionally, the HOXA10-ZIC2 axis can enhance NPC cell proliferation and invasion.
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Affiliation(s)
- Z-H Shen
- Department of Nuclear Medicine, Yishui Central Hospital of Linyi, Linyi, Shandong, China.
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Du T, Sun X, Yuan G, Zhou X, Lu H, Lin X, Yu X. Sex differences in the impact of nonalcoholic fatty liver disease on cardiovascular risk factors. Nutr Metab Cardiovasc Dis 2017; 27:63-69. [PMID: 27956025 DOI: 10.1016/j.numecd.2016.10.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [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: 05/25/2016] [Revised: 10/08/2016] [Accepted: 10/12/2016] [Indexed: 12/15/2022]
Abstract
BACKGROUND AND AIMS Information on sex differences in the association of nonalcoholic fatty liver disease (NAFLD) with cardiovascular disease (CVD) risk factors is scarce. We examined whether men exhibit greater differences in established CVD risk factors between NAFLD and non-NAFLD than women. METHODS AND RESULTS We conducted a cross-sectional analysis using a cohort of 10761 apparently healthy Chinese adults who underwent comprehensive health checkups including abdominal ultrasonography. In the setting of NAFLD and non-NAFLD, although men had significantly higher levels of atherogenic lipids as indicated by higher levels of triglyceride, triglyceride/HDL-cholesterol, and lower levels of HDL-cholesterol and worsen renal function as indicated by higher levels of creatinine and lower levels of estimated glomerular filtration rate (eGFR) than female counterparts, men with NAFLD showed greater relative differences in atherogenic lipids and deteriorated renal function than women with NAFLD when compared with their non-NAFLD counterparts. The interactions between sex and NAFLD on triglyceride, HDL-cholesterol, triglyceride/HDL-cholesterol, creatinine, and eGFR were statistically significant (P < 0.05). In the multivariate Logistic regression analyses, we observed a stronger association of TG with NAFLD and comparable associations of eGFR or HDL-C with NAFLD in men compared with women. CONCLUSION There was greater adverse influence of NAFLD per se on triglyceride, and triglyceride/HDL-cholesterol in men compared with women. The greater adverse influence of NAFLD per se on HDL-C and eGFR in men compared with women probably related to the gender differences in TG levels.
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Affiliation(s)
- T Du
- Department of Endocrinology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - X Sun
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - G Yuan
- Department of Endocrinology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - X Zhou
- Department of Endocrinology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - H Lu
- Department of Health Examination, Wuhan Iron and Steel Company (WISCO) General Hospital, Wuhan 430080, China
| | - X Lin
- Department of Endocrinology, Wuhan Iron and Steel Company (WISCO) General Hospital, Wuhan 430080, China
| | - X Yu
- Department of Endocrinology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China.
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Du T, Fan Y, Chen Q, Lyu Q, Kuang Y. Recurrence risk of ectopic pregnancy is not increased for patients with previous ectopic pregnancy compared with those without previous ectopic pregnancy in frozen blastocyst transfer cycles: a study based on more than 30,000 cycles. Fertil Steril 2016. [DOI: 10.1016/j.fertnstert.2016.07.082] [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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Du T, Chen Q, Lyu Q, Kuang Y. Is blastocyst transfer associated with a significantly lower incidence of ectopic pregnancy? a strictly controlled retrospect cohort study based on more than 30,000 frozen embryo transfer cycles. Fertil Steril 2016. [DOI: 10.1016/j.fertnstert.2016.07.304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Du T, Chen Q, Lyu Q, Kuang Y. Effects of different endometrial preparations on the outcomes of frozen embryo transfer cycles of in vitro fertilization/intracytoplasmic sperm injection: a study based on more than 30,000 cycles. Fertil Steril 2016. [DOI: 10.1016/j.fertnstert.2016.07.978] [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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Zhou TT, Quan LL, Chen LP, Du T, Sun KX, Zhang JC, Yu L, Li Y, Wan P, Chen LL, Jiang BH, Hu LH, Chen J, Shen X. SP6616 as a new Kv2.1 channel inhibitor efficiently promotes β-cell survival involving both PKC/Erk1/2 and CaM/PI3K/Akt signaling pathways. Cell Death Dis 2016; 7:e2216. [PMID: 27148689 PMCID: PMC4917657 DOI: 10.1038/cddis.2016.119] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Revised: 04/07/2016] [Accepted: 04/11/2016] [Indexed: 12/31/2022]
Abstract
Kv2.1 as a voltage-gated potassium (Kv) channel subunit has a pivotal role in the regulation of glucose-stimulated insulin secretion (GSIS) and pancreatic β-cell apoptosis, and is believed to be a promising target for anti-diabetic drug discovery, although the mechanism underlying the Kv2.1-mediated β-cell apoptosis is obscure. Here, the small molecular compound, ethyl 5-(3-ethoxy-4-methoxyphenyl)-2-(4-hydroxy-3-methoxybenzylidene)-7-methyl-3-oxo-2,3-dihydro-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate (SP6616) was discovered to be a new Kv2.1 inhibitor. It was effective in both promoting GSIS and protecting β cells from apoptosis. Evaluation of SP6616 on either high-fat diet combined with streptozocin-induced type 2 diabetic mice or db/db mice further verified its efficacy in the amelioration of β-cell dysfunction and glucose homeostasis. SP6616 treatment efficiently increased serum insulin level, restored β-cell mass, decreased fasting blood glucose and glycated hemoglobin levels, and improved oral glucose tolerance. Mechanism study indicated that the promotion of SP6616 on β-cell survival was tightly linked to its regulation against both protein kinases C (PKC)/extracellular-regulated protein kinases 1/2 (Erk1/2) and calmodulin(CaM)/phosphatidylinositol 3-kinase(PI3K)/serine/threonine-specific protein kinase (Akt) signaling pathways. To our knowledge, this may be the first report on the underlying pathway responsible for the Kv2.1-mediated β-cell protection. In addition, our study has also highlighted the potential of SP6616 in the treatment of type 2 diabetes.
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Affiliation(s)
- T T Zhou
- CAS Key Laboratory of Receptor Research, 3th Department of Pharmacology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - L L Quan
- College of Life and Environmental Sciences, Shanghai Normal University, Shanghai, China
| | - L P Chen
- CAS Key Laboratory of Receptor Research, 3th Department of Pharmacology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - T Du
- CAS Key Laboratory of Receptor Research, 3th Department of Pharmacology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - K X Sun
- CAS Key Laboratory of Receptor Research, 3th Department of Pharmacology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China
| | - J C Zhang
- College of Life and Environmental Sciences, Shanghai Normal University, Shanghai, China
| | - L Yu
- CAS Key Laboratory of Receptor Research, 3th Department of Pharmacology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Y Li
- CAS Key Laboratory of Receptor Research, 3th Department of Pharmacology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - P Wan
- College of Life and Environmental Sciences, Shanghai Normal University, Shanghai, China
| | - L L Chen
- CAS Key Laboratory of Receptor Research, 3th Department of Pharmacology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - B H Jiang
- CAS Key Laboratory of Receptor Research, 3th Department of Pharmacology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - L H Hu
- CAS Key Laboratory of Receptor Research, 3th Department of Pharmacology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - J Chen
- CAS Key Laboratory of Receptor Research, 3th Department of Pharmacology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
| | - X Shen
- CAS Key Laboratory of Receptor Research, 3th Department of Pharmacology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, China.,University of Chinese Academy of Sciences, Beijing, China
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Du T, Mahmoud M. Variability of fasting outcomes observed in a single patient. Br J Anaesth 2016; 116:560-1. [PMID: 26994238 DOI: 10.1093/bja/aew043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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19
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Du T, Chen H, Lyu Q, Kuang Y. Recurrent ectopic pregnancy history is one of the risk factors of intrauterine implantation failure in women undergoing frozen-thawed embryo transfer cycles. Fertil Steril 2015. [DOI: 10.1016/j.fertnstert.2015.07.1069] [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]
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20
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Zhao CX, Fan F, Du T, Chigrinov VG, Kwok HS. Multilayer photo-aligned thin-film structure for polarizing photonics. Opt Lett 2015; 40:2993-2996. [PMID: 26125350 DOI: 10.1364/ol.40.002993] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
In this Letter, an advanced multilayer photo-aligned liquid crystal polymer (LCP) thin-film structure with multiple optical functions is introduced. Within each LCP layer, a spatially distribution of local optical axes can be controlled by a patterned photo-alignment layer. As an embodiment of the proposed structure, a two-layer structure with pixelated controlled light-propagation directions and polarizations has been studied, which has shown the potential to be used as a photomask for generating multi-domain photo-alignment structures with a single exposure step. The combination of the multilayer structure with patterned photo-alignment technology provides a new perspective of designing optical structures for polarizing photonics applications.
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21
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Peng X, Dong M, Ma L, Jia XE, Mao J, Jin C, Chen Y, Gao L, Liu X, Ma K, Wang L, Du T, Jin Y, Huang Q, Li K, Zon LI, Liu T, Deng M, Zhou Y, Xi X, Zhou Y, Chen S. A point mutation of zebrafish c-cbl gene in the ring finger domain produces a phenotype mimicking human myeloproliferative disease. Leukemia 2015; 29:2355-65. [PMID: 26104663 DOI: 10.1038/leu.2015.154] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2015] [Revised: 05/09/2015] [Accepted: 05/12/2015] [Indexed: 12/12/2022]
Abstract
Controlled self-renewal and differentiation of hematopoietic stem/progenitor cells (HSPCs) are critical for vertebrate development and survival. These processes are tightly regulated by the transcription factors, signaling molecules and epigenetic factors. Impaired regulations of their function could result in hematological malignancies. Using a large-scale zebrafish N-ethyl-N-nitrosourea mutagenesis screening, we identified a line named LDD731, which presented significantly increased HSPCs in hematopoietic organs. Further analysis revealed that the cells of erythroid/myeloid lineages in definitive hematopoiesis were increased while the primitive hematopoiesis was not affected. The homozygous mutation was lethal with a median survival time around 14-15 days post fertilization. The causal mutation was located by positional cloning in the c-cbl gene, the human ortholog of which, c-CBL, is found frequently mutated in myeloproliferative neoplasms (MPN) or acute leukemia. Sequence analysis showed the mutation in LDD731 caused a histidine-to-tyrosine substitution of the amino acid codon 382 within the RING finger domain of c-Cbl. Moreover, the myeloproliferative phenotype in zebrafish seemed dependent on the Flt3 (fms-like tyrosine kinase 3) signaling, consistent with that observed in both mice and humans. Our study may shed new light on the pathogenesis of MPN and provide a useful in vivo vertebrate model of this syndrome for screening drugs.
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Affiliation(s)
- X Peng
- State Key Laboratory for Medical Genomics, Shanghai Institute of Hematology, RuiJin Hospital, Shanghai Jiao Tong University (SJTU) School of Medicine, and Collaborative Innovation Center of Systems Biomedicine, SJTU, Shanghai, China
| | - M Dong
- Key Laboratory of Stem Cell Biology, Institute of Health Sciences, Shanghai Institutes for Biological Sciences and Graduate University, Chinese Academy of Sciences & Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - L Ma
- State Key Laboratory for Medical Genomics, Shanghai Institute of Hematology, RuiJin Hospital, Shanghai Jiao Tong University (SJTU) School of Medicine, and Collaborative Innovation Center of Systems Biomedicine, SJTU, Shanghai, China.,Shanghai Center for Systems Biomedicine, Ministry of Education Key Laboratory of Systems Biomedicine, Shanghai Jiao Tong University, Shanghai, China
| | - X-E Jia
- Key Laboratory of Stem Cell Biology, Institute of Health Sciences, Shanghai Institutes for Biological Sciences and Graduate University, Chinese Academy of Sciences & Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - J Mao
- State Key Laboratory for Medical Genomics, Shanghai Institute of Hematology, RuiJin Hospital, Shanghai Jiao Tong University (SJTU) School of Medicine, and Collaborative Innovation Center of Systems Biomedicine, SJTU, Shanghai, China
| | - C Jin
- Key Laboratory of Stem Cell Biology, Institute of Health Sciences, Shanghai Institutes for Biological Sciences and Graduate University, Chinese Academy of Sciences & Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Y Chen
- State Key Laboratory for Medical Genomics, Shanghai Institute of Hematology, RuiJin Hospital, Shanghai Jiao Tong University (SJTU) School of Medicine, and Collaborative Innovation Center of Systems Biomedicine, SJTU, Shanghai, China
| | - L Gao
- Key Laboratory of Stem Cell Biology, Institute of Health Sciences, Shanghai Institutes for Biological Sciences and Graduate University, Chinese Academy of Sciences & Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - X Liu
- State Key Laboratory for Medical Genomics, Shanghai Institute of Hematology, RuiJin Hospital, Shanghai Jiao Tong University (SJTU) School of Medicine, and Collaborative Innovation Center of Systems Biomedicine, SJTU, Shanghai, China
| | - K Ma
- Key Laboratory of Stem Cell Biology, Institute of Health Sciences, Shanghai Institutes for Biological Sciences and Graduate University, Chinese Academy of Sciences & Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - L Wang
- Key Laboratory of Stem Cell Biology, Institute of Health Sciences, Shanghai Institutes for Biological Sciences and Graduate University, Chinese Academy of Sciences & Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - T Du
- State Key Laboratory for Medical Genomics, Shanghai Institute of Hematology, RuiJin Hospital, Shanghai Jiao Tong University (SJTU) School of Medicine, and Collaborative Innovation Center of Systems Biomedicine, SJTU, Shanghai, China
| | - Y Jin
- State Key Laboratory for Medical Genomics, Shanghai Institute of Hematology, RuiJin Hospital, Shanghai Jiao Tong University (SJTU) School of Medicine, and Collaborative Innovation Center of Systems Biomedicine, SJTU, Shanghai, China
| | - Q Huang
- State Key Laboratory for Medical Genomics, Shanghai Institute of Hematology, RuiJin Hospital, Shanghai Jiao Tong University (SJTU) School of Medicine, and Collaborative Innovation Center of Systems Biomedicine, SJTU, Shanghai, China
| | - K Li
- State Key Laboratory for Medical Genomics, Shanghai Institute of Hematology, RuiJin Hospital, Shanghai Jiao Tong University (SJTU) School of Medicine, and Collaborative Innovation Center of Systems Biomedicine, SJTU, Shanghai, China
| | - L I Zon
- Stem Cell Program at Boston Children's Hospital, Hematology/Oncology Program at Children's Hospital and Dana Faber Cancer Institute, Harvard Medical School, Boston, MA, USA.,Howard Hughes Medical Institute, Boston, MA, USA
| | - T Liu
- State Key Laboratory for Medical Genomics, Shanghai Institute of Hematology, RuiJin Hospital, Shanghai Jiao Tong University (SJTU) School of Medicine, and Collaborative Innovation Center of Systems Biomedicine, SJTU, Shanghai, China.,Key Laboratory of Stem Cell Biology, Institute of Health Sciences, Shanghai Institutes for Biological Sciences and Graduate University, Chinese Academy of Sciences & Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - M Deng
- Key Laboratory of Stem Cell Biology, Institute of Health Sciences, Shanghai Institutes for Biological Sciences and Graduate University, Chinese Academy of Sciences & Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Y Zhou
- Key Laboratory of Stem Cell Biology, Institute of Health Sciences, Shanghai Institutes for Biological Sciences and Graduate University, Chinese Academy of Sciences & Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - X Xi
- State Key Laboratory for Medical Genomics, Shanghai Institute of Hematology, RuiJin Hospital, Shanghai Jiao Tong University (SJTU) School of Medicine, and Collaborative Innovation Center of Systems Biomedicine, SJTU, Shanghai, China
| | - Y Zhou
- Stem Cell Program at Boston Children's Hospital, Hematology/Oncology Program at Children's Hospital and Dana Faber Cancer Institute, Harvard Medical School, Boston, MA, USA
| | - S Chen
- State Key Laboratory for Medical Genomics, Shanghai Institute of Hematology, RuiJin Hospital, Shanghai Jiao Tong University (SJTU) School of Medicine, and Collaborative Innovation Center of Systems Biomedicine, SJTU, Shanghai, China
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22
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Wang F, Du T, Liang C, Verkhratsky A, Peng L. Ammonium increases Ca(2+) signalling and upregulates expression of Cav1.2 gene in astrocytes in primary cultures and in the in vivo brain. Acta Physiol (Oxf) 2015; 214:261-74. [PMID: 25846713 DOI: 10.1111/apha.12500] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [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: 02/05/2015] [Revised: 03/16/2015] [Accepted: 03/27/2015] [Indexed: 12/12/2022]
Abstract
AIM The primary aim of this study was to identify the effects of hyperammonaemia on functional expression of Cav1.2 L-type Ca(2+) channels in astroglia. METHODS Primary cultures of mouse astrocytes were used to study effects of chronic treatment (1-5 days) with ammonium chloride, at 1, 3 and 5 mm on depolarization-induced increases in free cytosolic Ca(2+) concentration ([Ca(2+)]i , measured with Fura-2 based microfluorimetry) in control conditions and following treatment with the L-type Ca(2+) channel inhibitor, nifedipine, or with ryanodine receptor inhibitor, ryanodine. Expression of Cav1.2 mRNA was identified with RT-PCR, whereas protein content was determined by Western blotting. Sustained hyperammonaemia in vivo was induced by daily injections of urease (33 units kg body weight(-1), i.p.) for 3 days. RESULTS Depolarization-induced [Ca(2+)]i transients sensitive to nifedipine (peak of the response) and to ryanodine (plateau phase) were significantly increased in astrocytes chronically exposed to ammonium. The ammonium-induced increase in Ca(2+) influx in astrocytes resulted from an upregulation of Cav1.2 channel's expression detected at mRNA and protein levels. Increase in Cav1.2 expression was prevented by ouabain antagonist canrenone. Similar upregulation of Cav1.2 gene expression was found in the brains of adult mice subjected to intraperitoneal injection of urease. In transgenic mice tagged with an astrocyte-specific or neurone-specific markers and treated with intraperitoneal injections of urease, the fluorescence-activated cell sorting of neurones and astrocytes demonstrated that Cav1.2 mRNA expression was upregulated in astrocytes, but not in neurones. CONCLUSIONS Ammonium-induced deregulation of astroglial Ca(2+) signalling, is, in part, associated with upregulation of Cav1.2 L-type calcium channels.
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Affiliation(s)
- F. Wang
- Laboratory of Brain Metabolic Diseases; Institute of Metabolic Disease Research and Drug Development; China Medical University; Shenyang China
| | - T. Du
- Laboratory of Brain Metabolic Diseases; Institute of Metabolic Disease Research and Drug Development; China Medical University; Shenyang China
| | - C. Liang
- Laboratory of Brain Metabolic Diseases; Institute of Metabolic Disease Research and Drug Development; China Medical University; Shenyang China
| | - A. Verkhratsky
- Faculty of Life Science; The University of Manchester; Manchester UK
- Achucarro Center for Neuroscience; IKERBASQUE; Basque Foundation for Science; Bilbao Spain
- University of Nizhny Novgorod; Nizhny Novgorod Russia
| | - L. Peng
- Laboratory of Brain Metabolic Diseases; Institute of Metabolic Disease Research and Drug Development; China Medical University; Shenyang China
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Du T, Zhang J, Yuan G, Zhang M, Zhou X, Liu Z, Sun X, Yu X. Nontraditional risk factors for cardiovascular disease and visceral adiposity index among different body size phenotypes. Nutr Metab Cardiovasc Dis 2015; 25:100-107. [PMID: 25159728 PMCID: PMC4302064 DOI: 10.1016/j.numecd.2014.07.006] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [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: 09/08/2013] [Revised: 07/08/2014] [Accepted: 07/14/2014] [Indexed: 11/17/2022]
Abstract
BACKGROUND AND AIMS Increased cardiovascular disease and mortality risk in metabolically healthy obese (MHO) individuals remain highly controversial. Several studies suggested risk while others do not. The traditional cardiovascular risk factors may be insufficient to demonstrate the complete range of metabolic abnormalities in MHO individuals. Hence, we aimed to compare the prevalence of elevated lipoprotein (a), apolipoprotein B, and uric acid (UA) levels, apolipoprotein B/apolipoprotein A1 ratio, and visceral adiposity index (VAI) scores, and low apolipoprotein A1 levels among 6 body size phenotypes (normal weight with and without metabolic abnormalities, overweight with and without metabolic abnormalities, and obese with or without metabolic abnormalities). METHODS AND RESULTS We conducted a cross-sectional analysis of 7765 Chinese adults using data from the nationwide China Health and Nutrition Survey 2009. MHO persons had intermediate prevalence of elevated apolipoprotein B and UA levels, apolipoprotein B/apolipoprotein A1 ratio and VAI scores, and low apolipoprotein A1 levels between metabolically healthy normal-weight (MHNW) and metabolically abnormal obese individuals (P < 0.001 for all comparisons). Elevated apolipoprotein B and UA concentrations, apolipoprotein B/apolipoprotein A1 ratio, and VAI scores were all strongly associated with the MHO phenotype (all P < 0.01). CONCLUSIONS Prevalence of elevated apolipoprotein B and UA levels, apolipoprotein B/apolipoprotein A1 ratio and VAI scores, and low levels of apolipoprotein A1 was higher among MHO persons than among MHNW individuals. The elevated levels of the nontraditional risk factors and VAI scores in MHO persons could contribute to the increased cardiovascular disease risk observed in long-term studies.
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Affiliation(s)
- T Du
- Department of Endocrinology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - J Zhang
- Department of Endocrinology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - G Yuan
- Department of Endocrinology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - M Zhang
- Department of Endocrinology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - X Zhou
- Department of Endocrinology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Z Liu
- Department of Endocrinology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - X Sun
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China.
| | - X Yu
- Department of Endocrinology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China.
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Abstract
Deep venous thrombosis (DVT) is a common surgical complication in cancer patients and
evidence that inflammation plays a role in the occurrence of DVT is increasing. We
studied a population of cancer patients with abdominal malignancies with the aim of
investigating whether the levels of circulating inflammatory cytokines were
associated with postoperative DVT, and to determine the levels in DVT diagnoses. The
serum levels of C-reactive protein (CRP), interleukins (IL)-6 and IL-10, nuclear
transcription factor-κB (NF-κB) and E-selectin (E-Sel) were determined in 120
individuals, who were divided into 3 groups: healthy controls, patients with and
patients without DVT after surgery for an abdominal malignancy. Data were analyzed by
ANOVA, Dunnet's T3 test, chi-square test, and univariate and multivariate logistic
regression as needed. The CRP, IL-6, NF-κB, and E-Sel levels in patients with DVT
were significantly higher than those in the other groups (P<0.05). The IL-10 level
was higher in patients with DVT than in controls but lower than in patients without
DVT. Univariate analysis revealed that CRP, IL-6, NF-κB, and E-Sel were statistically
associated with the risk of DVT (OR=1.98, P=0.002; OR=1.17, P=0.000; OR=1.03,
P=0.042; and OR=1.38, P=0.003; respectively), whereas IL-10 had a protective effect
(OR=0.94, P=0.011). Multivariate analysis showed that E-Sel was an independent risk
factor (OR=1.41, P=0.000). Thus, this study indicated that an increased serum level
of E-Sel was associated with increased DVT risk in postoperative patients with
abdominal malignancy, indicating that E-Sel may be a useful predictor of diagnosis of
DVT.
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Affiliation(s)
- T Du
- Department of General Surgery, Zhongnan Hospital, School of Medicine, National Wuhan University, Wuhan, Hubei Province, China
| | - Z Tan
- Department of General Surgery, Zhongnan Hospital, School of Medicine, National Wuhan University, Wuhan, Hubei Province, China
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Wang XQ, Fan F, Du T, Tam AMW, Ma Y, Srivastava AK, Chigrinov VG, Kwok HS. Liquid crystal Fresnel zone lens based on single-side-patterned photoalignment layer. Appl Opt 2014; 53:2026-2029. [PMID: 24787157 DOI: 10.1364/ao.53.002026] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Accepted: 02/16/2014] [Indexed: 06/03/2023]
Abstract
In this article, we disclose a method to fabricate a liquid crystal (LC) Fresnel zone lens (FZL) with high efficiency. The LCFZL, based on patterned planar-aligned regions, has been prepared by means of a two-step photoalignment technique. The proposed binary-phase LCFZL manifests 39% diffraction efficiency at the focal point, which is close to the theoretical limit, 41%. Moreover, because of a lower driving voltage and faster response time, these elements could find application in many modern devices.
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26
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Shen Y, Zhou H, Campbell L, Wang Z, Wang R, Du T, Haapasalo M. Fatigue and nanomechanical properties of K3XF nickel-titanium instruments. Int Endod J 2014; 47:1160-7. [DOI: 10.1111/iej.12265] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2013] [Accepted: 02/06/2014] [Indexed: 11/26/2022]
Affiliation(s)
- Y. Shen
- Division of Endodontics; Department of Oral Biological and Medical Sciences; Faculty of Dentistry; The University of British Columbia; Vancouver BC Canada
- Department of Materials Engineering; The University of British Columbia; Vancouver BC Canada
| | - H. Zhou
- Center for Biomedical Materials and Engineering; College of Material Science and Chemical Engineering; Harbin Engineering University; Harbin China
| | - L. Campbell
- Division of Endodontics; Department of Oral Biological and Medical Sciences; Faculty of Dentistry; The University of British Columbia; Vancouver BC Canada
| | - Z. Wang
- Division of Endodontics; Department of Oral Biological and Medical Sciences; Faculty of Dentistry; The University of British Columbia; Vancouver BC Canada
| | - R. Wang
- Department of Materials Engineering; The University of British Columbia; Vancouver BC Canada
| | - T. Du
- Department of Stomatology; Tongji Hospital; Tongji Medical College; Huazhong University of Science and Technology; Wuhan China
| | - M. Haapasalo
- Division of Endodontics; Department of Oral Biological and Medical Sciences; Faculty of Dentistry; The University of British Columbia; Vancouver BC Canada
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27
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Du T, Chen J, Cao D. Inhibition of pure iron in sulphuric acid byN,N-dipropynoxymethylamine acetate and its synergism with chloride. ACTA ACUST UNITED AC 2013. [DOI: 10.1179/000705900101501290] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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28
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Du T, Yu J, Cao C. Photoelectrochemical investigation of ac modulated passive films on 304 stainless steel in weak alkaline and neutral solutions. ACTA ACUST UNITED AC 2013. [DOI: 10.1179/000705900101501100] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Wang W, Dai LX, Zhang S, Yang Y, Yan N, Fan P, Dai L, Tian HW, Cheng L, Zhang XM, Li C, Zhang JF, Xu F, Shi G, Chen XL, Du T, Li YM, Wei YQ, Deng HX. Regulation of epidermal growth factor receptor signaling by plasmid-based microRNA-7 inhibits human malignant gliomas growth and metastasis in vivo. Neoplasma 2013; 60:274-83. [PMID: 23373996 DOI: 10.4149/neo_2013_036] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
MicroRNAs are endogenous, non-coding RNAs of approximately 20-22 nucleotides that regulate genes expression by binding to the 3' untranslated region (UTR) of targets mRNAs and play critical roles in cancer pathways. Malignant glioma is the most common and highly lethal central nervous system tumor for which little effective treatment is available over several decades. The purpose of this study was to explore the therapeutic potential of plasmid-based microRNA-7 (miR-7) for gliomas in vivo. Enhancing miR-7 levels in vitro could significantly induce cell apoptosis, and inhibit cell proliferation, cell migration and invasion. Western blotting analysis was performed, which indicated that miR-7 directly inhibited epidermal growth factor receptor (EGFR) and further antagonized the downstream protein kinases including ERK, Akt and Stat3. Furthermore, systemic administration of miR-7 encapsulated in cationic liposome resulted in glioma xenografts growth arrest and the metastatic nodules decrease effectively in a sequence-specific manner. In this study, miR-7 was applied in glioma treatment for the first time in vivo. Our findings suggested that the plasmid-mediated gene therapy with miR-7 appeared to be a promising candidate for the development of new antitumor and anti-metastasis treatment for human glioma.
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Affiliation(s)
- W Wang
- Sichuan University, Chengdu, People's Republic of China
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McCracken M, Wong A, Mitchell R, Gravel D, Conly J, Embil J, Johnston L, Matlow A, Ormiston D, Simor AE, Smith S, Du T, Hizon R, Mulvey MR. Molecular epidemiology of vancomycin-resistant enterococcal bacteraemia: results from the Canadian Nosocomial Infection Surveillance Program, 1999-2009. J Antimicrob Chemother 2013; 68:1505-9. [DOI: 10.1093/jac/dkt054] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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31
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Shen G, Li Y, Du T, Shi G, Dai L, Chen X, Zheng R, Li W, Su X, Zhang S, Wei Y, Yang S, Deng H. SKLB1002, a novel inhibitor of VEGF receptor 2 signaling, induces vascular normalization to improve systemically administered chemotherapy efficacy. Neoplasma 2012; 59:486-93. [PMID: 22668017 DOI: 10.4149/neo_2012_062] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Vascular endothelial growth factor receptor (VEGFR) or vascular endothelial growth factor (VEGF) inhibitors have shown only modest clinical activity for most tumor types when used as single agents. However, present evidence indicates that these antiangiogenic drugs can cause transient "normalization" of the tumor vasculature, thereby improving the delivery of systemic chemotherapy. We examined temporal changes in tumor vascular function in response to the novel VEGFR2 inhibitor, SKLB1002. Established tumor-bearing animals were evaluated at serial time points for treatment-associated changes in tumor vascular architecture and function. As a result, blocking VEGF signaling by SKLB1002 produced a morphologically and functionally "normalized" vascular network. Consistent with our observations, a 2.2 fold increase in intratumoral doxorubicin levels was determined with SKLB1002 pretreatment compared with administration of doxorubicin alone. Finally, combined SKLB1002 and doxorubicin exhibited significant antitumor (49% of control size) and antimetastatic effects (12% of control metastatic nodules) in vivo. Our results showed SKLB1002 induced vascular normalization and enhanced anticancer drug delivery, which were associated with the observed synergistic effect in vivo.
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Affiliation(s)
- G Shen
- State Key Laboratory of Biotherapy and Cancer Center, West China Hospital, Sichuan University, Chengdu, China
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Xie Q, Zhang S, Wang W, Li YM, Du T, Su XL, Wei YQ, Deng HX. Inhibition of hepatitis B virus gene expression by small interfering RNAs targeting cccDNA and X antigen. Acta Virol 2012; 56:49-55. [PMID: 22404609 DOI: 10.4149/av_2012_01_49] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
To test the possible inhibition of hepatitis B virus (HBV) replication and expression by small interfering RNAs (siRNAs) targeting simultaneously covalenthy closed circular DNA (dnacccDNA) and X antigen, corresponding recombinant plasmids were transfected into HepG2.2.15 cells and the levels of cccDNA, HBXAg, HBcAg, and HBeAg were assayed at various times post transfection. As expected, the single siRNAs showed marked inhibitory effects but their combination was even more efficient. These results provide a new insight into the development of a potential anti-HBV strategy of enhancing the efficacy of individual antivirals and overcoming the high mutation rate of HBV.
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Affiliation(s)
- Q Xie
- Sichuan University, Chengdu, People's Republic of China
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Yang Y, Zhang XM, Zhang N, Cheng L, Li C, Zhang S, Zhang JF, Dai L, Tian HW, Yan N, Fan P, Dai LX, Xu F, Shi G, Chen XL, Du T, Li YM, Wei YQ, Deng HX. IL15 combined with Caspy2 provides enhanced therapeutic efficiency against murine malignant neoplasm growth and metastasis. Cancer Gene Ther 2012; 19:460-7. [DOI: 10.1038/cgt.2012.17] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Du T, Caragounis A, Parker SJ, Meyerowitz J, La Fontaine S, Kanninen KM, Perreau VM, Crouch PJ, White AR. A potential copper-regulatory role for cytosolic expression of the DNA repair protein XRCC5. Free Radic Biol Med 2011; 51:2060-72. [PMID: 21971347 DOI: 10.1016/j.freeradbiomed.2011.09.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2011] [Revised: 08/29/2011] [Accepted: 09/02/2011] [Indexed: 11/20/2022]
Abstract
Copper (Cu) has a critical role in the generation of oxidative stress during neurodegeneration and cancer. Reactive oxygen species generated through abnormal elevation or deficiency of Cu can lead to lipid, protein, and DNA damage. Oxidation of DNA can induce strand breaks and is associated with altered cell fate including transformation or death. DNA repair is mediated through the action of the multimeric DNA-PK repair complex. The components of this complex are the Ku autoantigens, XRCC5 and XRCC6 (Ku80 and Ku70, respectively). How this repair complex responds to perturbed Cu homeostasis and Cu-mediated oxidative stress has not been investigated. We previously reported that XRCC5 expression is altered in response to cellular Cu levels, with low Cu inhibiting XRCC5 expression and high Cu levels enhancing expression. In this study we further investigated the interaction between XRCC5 and Cu. We report that cytosolic XRCC5 is increased in response to Cu, but not zinc, iron, or nickel, and the level of cytosolic XRCC5 correlates with protection against oxidative damage to DNA. These observations were made in both HeLa cells and fibroblasts. Cytosolic XRCC5 interacted with the Cu chaperone and detoxification protein human Atox1 homologue (HAH), and down regulation of XRCC5 expression using siRNA led to enhanced HAH expression when cells were exposed to Cu. XRCC5 could also be purified from cytosolic extracts using a Cu-loaded column. These findings provide further evidence that cytosolic XRCC5 has a key role in protection against DNA oxidation from Cu, through either direct sequestration or signaling through other Cu-detoxification molecules. Our findings have important implications for the development of therapeutic treatments targeting Cu in neurodegeneration and/or cancer.
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Affiliation(s)
- Tai Du
- Department of Pathology, The University of Melbourne, Melbourne, VIC 3010, Australia
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Cordeiro RP, Du T, Mulvey MR, Krause DO, Holley RA. Susceptibility of meat starter cultures to antimicrobials used in food animals in Canada. J Food Prot 2010; 73:916-22. [PMID: 20501043 DOI: 10.4315/0362-028x-73.5.916] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Lactic acid bacteria (LAB) are extensively used in the food industry for fermentation processes. However, it is possible that these bacteria may serve as a reservoir for antibiotic resistance genes that can be transferred to pathogens, giving rise to public health concerns. Animal operations that use antimicrobials as growth promotants have been linked to the origin of resistance due to the selective effect of low levels of antimicrobial used in this management strategy. The objective of this study was to determine the antimicrobial susceptibilities and mechanisms of resistance for 30 isolates of meat starter cultures commonly used in dry sausage fermentations to 20 antimicrobial agents. Susceptibility tests were performed by broth microdilution using Iso-Sensitest broth (90%, vol/vol) and de Man Rogosa Sharpe (MRS) broth (10%, vol/vol). The results showed that all 30 isolates exhibited resistance to at least three antimicrobials regardless of antimicrobial class while 17 or 30% of strains were resistant to antibiotics in three or six different classes, respectively. The incidence of antimicrobial resistance was higher among Pediococcus pentosaceus and lower for Staphylococcus carnosus strains. Genetic determinants for the lincosamide, macrolide, and tetracycline antimicrobials were not found using PCR. Phenotypic resistance in the absence of known resistance genes found here suggests that other mechanisms or genes might have contributed to the negative results. Further studies are needed to explore the genetic mechanisms underlying the prevalence of antibiotic resistance in Pediococcus species.
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Affiliation(s)
- R P Cordeiro
- Department of Food Science, University of Manitoba, Winnipeg, Manitoba R3T2N2, Canada
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Quesada-Gómez C, Du T, Gamboa-Coronado M, Rodríguez C, Mulvey M, Rodríguez-Cavallini E. The emergence of Clostridium difficile NAP1 hypervirulent strain in Latin America. Int J Infect Dis 2010. [DOI: 10.1016/j.ijid.2010.02.470] [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] Open
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Zhang Y, Du T, An X, Tu Z, Zhang G. Study on Ce-Doped Nonstoichiometric Nanosilica for Promoting Properties of Polysulfone Membranes. Chem Eng Technol 2010. [DOI: 10.1002/ceat.200900529] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Wang X, Sun W, Zhu X, Li L, Du T, Mao W, Wu X, Wei H, Zhu S, Sun Y, Liu Y, Niu N, Wang Y, Liu Y. Paroxysmal kinesigenic choreoathetosis: evidence of linkage to the pericentromeric region of chromosome 16 in four Chinese families. Eur J Neurol 2010; 17:800-7. [PMID: 20158512 DOI: 10.1111/j.1468-1331.2009.02929.x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND Paroxysmal kinesigenic choreoathetosis (PKC) is an autosomal dominant condition characterized by abnormal involuntary movements precipitated by sudden movement. The pericentromeric region of chromosome 16 has been linked to PKC by several reports. This study was to localize and identify PKC gene in four Chinese PKC families. METHODS Genetic linkage mapping with eight markers spanning chromosome 16p12-q13 was performed in 43 family members. Genome-wide single nucleotide polymorphism (SNP) scans were performed on four individuals in Family 1 in which infantile convulsion (IC) was co-inherited with PKC. RESULTS Individuals in Family 1 presented with both IC and paroxysmal choreoathetosis (ICCA), and Families 2, 3, and 4 presented only with PKC. Evidence for linkage was found with a maximum two-point LOD score of 4.89 for D16S690 (theta = 0.0) and a maximum multipoint LOD score was 5.34 between D16S3080 and D16S3136. Haplotype analysis showed the disease locus was between D16S3093 and D16S3057. A total of 84 SNPs spanned on 16q12.1-q13 was not segregated with the PKC phenotype, which defined an unlinked region from rs9933187 to rs8044753. Thus, the critical region of the PKC gene is across the pericentromeric region of chromosome 16, and most likely maps to a region of 20.5 Mb (6.2 cM) between D16S3093 and rs9933187 (16p11.2-q12.1). CONCLUSION The assignment of the locus for PKC to the pericentromeric region of chromosome 16 is confirmed and putatively narrowed in the present study.
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Affiliation(s)
- X Wang
- National Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, School of Basic Medicine, Peking Union Medical College, Beijing, China
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Zhang Y, Xiang L, Du T, Zhang Y, Lu M. Preparation and Characterization of Imprinted Porous Materials with High Selectivity for Luteolin. Chem Eng Technol 2009. [DOI: 10.1002/ceat.200900134] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Abstract
PRIMARY OBJECTIVE To expand upon earlier findings of elevated dark adaptation (scotopic) thresholds in photosensitive individuals with traumatic brain injury (TBI). METHODS AND PROCEDURES To assess scotopic thresholds in individuals with TBI (n = 17) manifesting varying degrees of photosensitivity (mild, moderate or marked), but without retinal dysfunction, to those of non-photosensitive, visually-normal individuals (n = 21) using a hand-held dark adaptometer. MAIN OUTCOMES AND RESULTS The group mean scotopic threshold for the TBI group was significantly higher than that of the visually-normal group. Over 50% (nine out of 17) of the TBI group exhibited elevated thresholds. There was no correlation between the threshold value and degree of photosensitivity. CONCLUSION The elevated scotopic thresholds suggest an abnormality in cortical gain control. An anomalous adaptive response may develop due to cortical damage, thereby attenuating subjective light sensation.
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Affiliation(s)
- T Du
- Department of Vision Sciences, State University of New York/State College of Optometry, New York 10036, USA
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Crouch PJ, Tew DJ, Du T, Nguyen DN, Caragounis A, Filiz G, Blake RE, Trounce IA, Soon CPW, Laughton K, Perez KA, Li QX, Cherny RA, Masters CL, Barnham KJ, White AR. Restored degradation of the Alzheimer’s amyloid-β peptide by targeting amyloid formation. J Neurochem 2009; 108:1198-207. [DOI: 10.1111/j.1471-4159.2009.05870.x] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [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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Crouch PJ, Hung LW, Adlard PA, Cortes M, Lal V, Filiz G, Perez KA, Nurjono M, Caragounis A, Du T, Laughton K, Volitakis I, Bush AI, Li QX, Masters CL, Cappai R, Cherny RA, Donnelly PS, White AR, Barnham KJ. Increasing Cu bioavailability inhibits Abeta oligomers and tau phosphorylation. Proc Natl Acad Sci U S A 2009; 106:381-6. [PMID: 19122148 PMCID: PMC2626711 DOI: 10.1073/pnas.0809057106] [Citation(s) in RCA: 218] [Impact Index Per Article: 14.5] [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: 09/11/2008] [Indexed: 11/18/2022] Open
Abstract
Cognitive decline in Alzheimer's disease (AD) involves pathological accumulation of synaptotoxic amyloid-beta (Abeta) oligomers and hyperphosphorylated tau. Because recent evidence indicates that glycogen synthase kinase 3beta (GSK3beta) activity regulates these neurotoxic pathways, we developed an AD therapeutic strategy to target GSK3beta. The strategy involves the use of copper-bis(thiosemicarbazonoto) complexes to increase intracellular copper bioavailability and inhibit GSK3beta through activation of an Akt signaling pathway. Our lead compound Cu(II)(gtsm) significantly inhibited GSK3beta in the brains of APP/PS1 transgenic AD model mice. Cu(II)(gtsm) also decreased the abundance of Abeta trimers and phosphorylated tau, and restored performance of AD mice in the Y-maze test to levels expected for cognitively normal animals. Improvement in the Y-maze correlated directly with decreased Abeta trimer levels. This study demonstrates that increasing intracellular copper bioavailability can restore cognitive function by inhibiting the accumulation of neurotoxic Abeta trimers and phosphorylated tau.
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Affiliation(s)
- Peter J. Crouch
- Department of Pathology
- Centre for Neuroscience
- Mental Health Research Institute of Victoria, Parkville, Victoria 3052, Australia
| | - Lin Wai Hung
- Department of Pathology
- Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Melbourne, Victorial, 3010, Australia; and
- Mental Health Research Institute of Victoria, Parkville, Victoria 3052, Australia
| | - Paul A. Adlard
- Mental Health Research Institute of Victoria, Parkville, Victoria 3052, Australia
| | - Mikhalina Cortes
- Mental Health Research Institute of Victoria, Parkville, Victoria 3052, Australia
| | - Varsha Lal
- Mental Health Research Institute of Victoria, Parkville, Victoria 3052, Australia
| | - Gulay Filiz
- Department of Pathology
- Centre for Neuroscience
- Mental Health Research Institute of Victoria, Parkville, Victoria 3052, Australia
| | - Keyla A. Perez
- Department of Pathology
- Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Melbourne, Victorial, 3010, Australia; and
- Mental Health Research Institute of Victoria, Parkville, Victoria 3052, Australia
| | - Milawaty Nurjono
- Mental Health Research Institute of Victoria, Parkville, Victoria 3052, Australia
| | - Aphrodite Caragounis
- Department of Pathology
- Centre for Neuroscience
- Mental Health Research Institute of Victoria, Parkville, Victoria 3052, Australia
| | - Tai Du
- Department of Pathology
- Centre for Neuroscience
- Mental Health Research Institute of Victoria, Parkville, Victoria 3052, Australia
| | - Katrina Laughton
- Department of Pathology
- Mental Health Research Institute of Victoria, Parkville, Victoria 3052, Australia
| | - Irene Volitakis
- Department of Pathology
- Mental Health Research Institute of Victoria, Parkville, Victoria 3052, Australia
| | - Ashley I. Bush
- Mental Health Research Institute of Victoria, Parkville, Victoria 3052, Australia
| | - Qiao-Xin Li
- Department of Pathology
- Centre for Neuroscience
- Mental Health Research Institute of Victoria, Parkville, Victoria 3052, Australia
| | - Colin L. Masters
- Mental Health Research Institute of Victoria, Parkville, Victoria 3052, Australia
| | - Roberto Cappai
- Department of Pathology
- Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Melbourne, Victorial, 3010, Australia; and
- Mental Health Research Institute of Victoria, Parkville, Victoria 3052, Australia
| | - Robert A. Cherny
- Mental Health Research Institute of Victoria, Parkville, Victoria 3052, Australia
| | - Paul S. Donnelly
- School of Chemistry, and
- Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Melbourne, Victorial, 3010, Australia; and
| | - Anthony R. White
- Department of Pathology
- Centre for Neuroscience
- Mental Health Research Institute of Victoria, Parkville, Victoria 3052, Australia
| | - Kevin J. Barnham
- Department of Pathology
- Bio21 Molecular Science and Biotechnology Institute, University of Melbourne, Melbourne, Victorial, 3010, Australia; and
- Mental Health Research Institute of Victoria, Parkville, Victoria 3052, Australia
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Wang X, Sun W, Zhu X, Wu X, Li L, Zhu S, Du T, Liu Y, Niu N, Wang Y, Liu Y. M129V polymorphism in the prion protein gene is not associated with mesial temporal lobe epilepsy in a Han Chinese population. Eur J Neurol 2008; 15:827-30. [DOI: 10.1111/j.1468-1331.2008.02191.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Du T, La Fontaine SL, Abdo M, Bellingham SA, Greenough M, Volitakis I, Cherny RA, Bush AI, Hudson PJ, Camakaris J, Mercer JF, Crouch PJ, Masters CL, Perreau VM, White AR. Investigating copper-regulated protein expression in Menkes fibroblasts using antibody microarrays. Proteomics 2008; 8:1819-31. [DOI: 10.1002/pmic.200700895] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Li B, Du T, Li H, Gu L, Zhang H, Huang J, Hertz L, Peng L. Signalling pathways for transactivation by dexmedetomidine of epidermal growth factor receptors in astrocytes and its paracrine effect on neurons. Br J Pharmacol 2008; 154:191-203. [PMID: 18311185 DOI: 10.1038/bjp.2008.58] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND AND PURPOSE Stimulation of astrocytes by the alpha(2)-adrenoceptor agonist dexmedetomidine, a neuroprotective drug, transactivates epidermal growth factor (EGF) receptors. The present study investigates signal pathways leading to release of an EGF receptor ligand and those activated during EGF receptor stimulation, and the response of neurons to dexmedetomidine and to astrocyte-conditioned medium. EXPERIMENTAL APPROACH Phosphorylation of ERK(1/2) was determined by western blotting and immunocytochemistry, and phosphorylation of EGF receptors by immunoprecipitation and western blotting. mRNA expression of fos family was measured by RT-PCR. KEY RESULTS Pertussis toxin (0.2 microg ml(-1)) an inhibitor of betagamma subunit dissociation from Galpha(i) protein, and GF 109203X (500 nM), a protein kinase C inhibitor, abolished ERK(1/2) phosphorylation. PP1 (10 microM), inhibiting Src kinase and GM 6001 (10 microM), an inhibitor of Zn-dependent metalloproteinase, abolished ERK(1/2) phosphorylation by dexmedetomidine (50 nM), but not that by EGF (10 ng ml(-1)), showing Src kinase and metalloproteinase activation during the first stage only; AG 1478 (1 microM), an inhibitor of the EGF receptor tyrosine kinase, abolished ERK(1/2) phosphorylation. Dexmedetomidine-induced EGF receptor phosphorylation was prevented by AG 1478, GM 6001, PP1 and GF 109203X and its induction of cfos and fosB by AG 1478 and by U0126 (10 microM), an inhibitor of ERK phosphorylation, indicating downstream effects of ERK(1/2) phosphorylation. EGF and conditioned medium from dexmedetomidine-treated astrocytes, but not dexmedetomidine itself, induced ERK phosphorylation in primary cultures of cerebellar neurons. CONCLUSIONS AND IMPLICATIONS Dexmedetomidine-induced transactivation pathways were delineated. Its paracrine effect on neurons may account for its neuroprotective effects.
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Affiliation(s)
- B Li
- Department of Clinical Pharmacology, China Medical University, Shenyang, PR China
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Donnelly PS, Caragounis A, Du T, Laughton KM, Volitakis I, Cherny RA, Sharples RA, Hill AF, Li QX, Masters CL, Barnham KJ, White AR. Selective Intracellular Release of Copper and Zinc Ions from Bis(thiosemicarbazonato) Complexes Reduces Levels of Alzheimer Disease Amyloid-β Peptide. J Biol Chem 2008; 283:4568-77. [DOI: 10.1074/jbc.m705957200] [Citation(s) in RCA: 146] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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Price KA, Filiz G, Caragounis A, Du T, Laughton KM, Masters CL, Sharples RA, Hill AF, Li QX, Donnelly PS, Barnham KJ, Crouch PJ, White AR. Activation of epidermal growth factor receptor by metal-ligand complexes decreases levels of extracellular amyloid beta peptide. Int J Biochem Cell Biol 2008; 40:1901-17. [DOI: 10.1016/j.biocel.2008.01.033] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2007] [Revised: 01/24/2008] [Accepted: 01/29/2008] [Indexed: 10/22/2022]
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Du T, Ciccotosto GD, Cranston GA, Kocak G, Masters CL, Crouch PJ, Cappai R, White AR. Neurotoxicity from glutathione depletion is mediated by Cu-dependent p53 activation. Free Radic Biol Med 2008; 44:44-55. [PMID: 18045546 DOI: 10.1016/j.freeradbiomed.2007.09.001] [Citation(s) in RCA: 17] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2007] [Revised: 09/05/2007] [Accepted: 09/05/2007] [Indexed: 01/21/2023]
Abstract
Loss of intracellular neuronal glutathione (GSH) is an important feature of neurodegenerative disorders including Alzheimer's disease, Parkinson's disease, and amyotrophic lateral sclerosis. The consequences of GSH depletion include increased oxidative damage to proteins, lipids, and DNA and subsequent cytotoxic effects. GSH is also an important modulator of cellular copper (Cu) homeostasis and altered Cu metabolism is central to the pathology of several neurodegenerative diseases. The cytotoxic effects of Cu in cells depleted of GSH are not well understood. We have previously reported that depletion of neuronal GSH levels results in cell death from trace levels of extracellular Cu due to elevated Cu(I)-mediated free radical production. In this study we further examined the molecular pathway of trace Cu toxicity in neurons and fibroblasts depleted of GSH. Treatment of primary cortical neurons or 3T3 fibroblasts with the glutathione synthetase inhibitor buthionine sulfoximine resulted in substantial loss of intracellular GSH and increased cytotoxicity. We found that both neurons and fibroblasts revealed increased expression and activation of p53 after depletion of GSH. The increased p53 activity was induced by extracellular trace Cu. Furthermore, we showed that in GSH-depleted cells, Cu induced an increase in oxidative stress resulting in DNA damage and activation of p53-dependent cell death. These findings may have important implications for neurodegenerative disorders that involve GSH depletion and aberrant Cu metabolism.
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Affiliation(s)
- Tai Du
- Department of Pathology, The University of Melbourne, Melbourne, VIC 3010, Australia
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Caragounis A, Du T, Filiz G, Laughton K, Volitakis I, Sharples R, Cherny R, Masters C, Drew S, Hill A, Li QX, Crouch P, Barnham K, White A. Differential modulation of Alzheimer's disease amyloid beta-peptide accumulation by diverse classes of metal ligands. Biochem J 2007; 407:435-50. [PMID: 17680773 PMCID: PMC2275059 DOI: 10.1042/bj20070579] [Citation(s) in RCA: 52] [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: 02/03/2023]
Abstract
Biometals have an important role in AD (Alzheimer's disease) and metal ligands have been investigated as potential therapeutic agents for treatment of AD. In recent studies the 8HQ (8-hydroxyquinoline) derivative CQ (clioquinol) has shown promising results in animal models and small clinical trials; however, the actual mode of action in vivo is still being investigated. We previously reported that CQ-metal complexes up-regulated MMP (matrix metalloprotease) activity in vitro by activating PI3K (phosphoinositide 3-kinase) and JNK (c-jun N-terminal kinase), and that the increased MMP activity resulted in enhanced degradation of secreted Abeta (amyloid beta) peptide. In the present study, we have further investigated the biochemical mechanisms by which metal ligands affect Abeta metabolism. To achieve this, we measured the effects of diverse metal ligands on cellular metal uptake and secreted Abeta levels in cell culture. We report that different classes of metal ligands including 8HQ and phenanthroline derivatives and the sulfur compound PDTC (pyrrolidine dithiocarbamate) elevated cellular metal levels (copper and zinc), and resulted in substantial loss of secreted Abeta. Generally, the ability to inhibit Abeta levels correlated with a higher lipid solubility of the ligands and their capacity to increase metal uptake. However, we also identified several ligands that potently inhibited Abeta levels while only inducing minimal change to cellular metal levels. Metal ligands that inhibited Abeta levels [e.g. CQ, 8HQ, NC (neocuproine), 1,10-phenanthroline and PDTC] induced metal-dependent activation of PI3K and JNK, resulting in JNK-mediated up-regulation of metalloprotease activity and subsequent loss of secreted Abeta. The findings in the present study show that diverse metal ligands with high lipid solubility can elevate cellular metal levels resulting in metalloprotease-dependent inhibition of Abeta. Given that a structurally diverse array of ligands was assessed, the results are consistent with the effects being due to metal transport rather than the chelating ligand interacting directly with a receptor.
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Affiliation(s)
- Aphrodite Caragounis
- *Department of Pathology, The University of Melbourne, Victoria 3010, Australia
- †The Mental Health Research Institute, Parkville, Victoria 3052, Australia
- ‡Centre for Neuroscience, The University of Melbourne, Victoria 3010, Australia
| | - Tai Du
- *Department of Pathology, The University of Melbourne, Victoria 3010, Australia
- †The Mental Health Research Institute, Parkville, Victoria 3052, Australia
- ‡Centre for Neuroscience, The University of Melbourne, Victoria 3010, Australia
| | - Gulay Filiz
- *Department of Pathology, The University of Melbourne, Victoria 3010, Australia
- †The Mental Health Research Institute, Parkville, Victoria 3052, Australia
- ‡Centre for Neuroscience, The University of Melbourne, Victoria 3010, Australia
| | - Katrina M. Laughton
- *Department of Pathology, The University of Melbourne, Victoria 3010, Australia
- †The Mental Health Research Institute, Parkville, Victoria 3052, Australia
| | - Irene Volitakis
- *Department of Pathology, The University of Melbourne, Victoria 3010, Australia
- ‡Centre for Neuroscience, The University of Melbourne, Victoria 3010, Australia
| | - Robyn A. Sharples
- *Department of Pathology, The University of Melbourne, Victoria 3010, Australia
- †The Mental Health Research Institute, Parkville, Victoria 3052, Australia
- §Bio21 Molecular Science and Biotechnology Institute, Parkville, Victoria 3052, Australia
- ∥Department of Biochemistry and Molecular Biology, The University of Melbourne, Victoria 3010, Australia
| | - Robert A. Cherny
- *Department of Pathology, The University of Melbourne, Victoria 3010, Australia
- †The Mental Health Research Institute, Parkville, Victoria 3052, Australia
| | - Colin L. Masters
- *Department of Pathology, The University of Melbourne, Victoria 3010, Australia
- †The Mental Health Research Institute, Parkville, Victoria 3052, Australia
- ‡Centre for Neuroscience, The University of Melbourne, Victoria 3010, Australia
| | - Simon C. Drew
- *Department of Pathology, The University of Melbourne, Victoria 3010, Australia
- †The Mental Health Research Institute, Parkville, Victoria 3052, Australia
- §Bio21 Molecular Science and Biotechnology Institute, Parkville, Victoria 3052, Australia
| | - Andrew F. Hill
- *Department of Pathology, The University of Melbourne, Victoria 3010, Australia
- †The Mental Health Research Institute, Parkville, Victoria 3052, Australia
- §Bio21 Molecular Science and Biotechnology Institute, Parkville, Victoria 3052, Australia
- ∥Department of Biochemistry and Molecular Biology, The University of Melbourne, Victoria 3010, Australia
| | - Qiao-Xin Li
- *Department of Pathology, The University of Melbourne, Victoria 3010, Australia
- †The Mental Health Research Institute, Parkville, Victoria 3052, Australia
| | - Peter J. Crouch
- *Department of Pathology, The University of Melbourne, Victoria 3010, Australia
- †The Mental Health Research Institute, Parkville, Victoria 3052, Australia
- ‡Centre for Neuroscience, The University of Melbourne, Victoria 3010, Australia
| | - Kevin J. Barnham
- *Department of Pathology, The University of Melbourne, Victoria 3010, Australia
- †The Mental Health Research Institute, Parkville, Victoria 3052, Australia
- §Bio21 Molecular Science and Biotechnology Institute, Parkville, Victoria 3052, Australia
| | - Anthony R. White
- *Department of Pathology, The University of Melbourne, Victoria 3010, Australia
- †The Mental Health Research Institute, Parkville, Victoria 3052, Australia
- ‡Centre for Neuroscience, The University of Melbourne, Victoria 3010, Australia
- To whom correspondence should be addressed (email )
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Du T, Filiz G, Caragounis A, Crouch PJ, White AR. Clioquinol promotes cancer cell toxicity through tumor necrosis factor alpha release from macrophages. J Pharmacol Exp Ther 2007; 324:360-7. [PMID: 17940196 DOI: 10.1124/jpet.107.130377] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Copper has an important role in cancer growth, angiogenesis, and metastasis. Previous studies have shown that cell-permeable metal ligands, including clioquinol (CQ) and pyrrolidine dithiocarbamate, inhibit cancer cell growth in cell culture and in vivo. The mechanism of action has not been fully determined but may involve metal-mediated inhibition of cancer cell proteasome activity. However, these studies do not fully account for the ability of cell-permeable metal ligands to inhibit cancer cell growth without affecting normal cells. In this study, we examined the effect of CQ on macrophage-mediated inhibition of HeLa cancer cell growth in vitro. When CQ was added to RAW 264.7 macrophage-HeLa cell cocultures, a substantial increase in HeLa cell toxicity was observed compared with CQ treatment of HeLa cells cultured alone. Transfer of conditioned medium from CQ-treated macrophages to HeLa cells also induced HeLa cell toxicity, demonstrating the role of secreted factors in the macrophage-mediated effect. Further investigation revealed that CQ induced copper-dependent activation of macrophages and release of tumor necrosis factor (TNF) alpha. In studies with recombinant TNFalpha, we showed that the level of TNFalpha released by CQ-treated macrophages was sufficient to induce HeLa cell toxicity. Moreover, the toxic effect of conditioned medium from CQ-treated macrophages could be prevented by addition of neutralizing antibodies to TNFalpha. These studies demonstrate that CQ can induce cancer cell toxicity through metal-dependent release of TNFalpha from macrophages. Our results may help to explain the targeted inhibition of tumor growth in vivo by CQ.
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Affiliation(s)
- Tai Du
- Centre for Neuroscience and Department of Pathology, University of Melbourne, Victoria, Australia 3010.
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