1
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Weng X, Fu JC, Huang QT, Liu X, Huang YH. [Primary central nervous system ALK-positive anaplastic large cell lymphoma: a clinicopathological analysis of four cases]. Zhonghua Bing Li Xue Za Zhi 2023; 52:1031-1033. [PMID: 37805396 DOI: 10.3760/cma.j.cn112151-20230314-00193] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 10/09/2023]
Affiliation(s)
- X Weng
- Department of Pathology, Shenzhen Second People's Hospital, Shenzhen University First Affiliated Hospital, Shenzhen 518000, China
| | - J C Fu
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Department of Pathology, Sun Yat-sen University Cancer Center, Guangzhou 510060, China
| | - Q T Huang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Department of Pathology, Sun Yat-sen University Cancer Center, Guangzhou 510060, China
| | - X Liu
- Department of Pathology, Shenzhen Second People's Hospital, Shenzhen University First Affiliated Hospital, Shenzhen 518000, China
| | - Y H Huang
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Department of Pathology, Sun Yat-sen University Cancer Center, Guangzhou 510060, China
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2
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Yao Y, Wu YS, Weng X, Viswanath K, Lee EWJ, Wang MP. Socio-economic disparities in exposure to and endorsement of COVID-19 vaccine misinformation and the associations with vaccine hesitancy and vaccination. Public Health 2023; 223:217-222. [PMID: 37677851 DOI: 10.1016/j.puhe.2023.08.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2023] [Accepted: 08/03/2023] [Indexed: 09/09/2023]
Abstract
OBJECTIVES We examined disparities in vaccine misinformation exposure and endorsement and the associations with vaccine hesitancy and vaccination uptake. STUDY DESIGN Population-based survey. METHODS A population-based survey was conducted on 5,002 Hong Kong adults oversampling low socio-economic status (SES, n = 2,200). Information on exposure (13 misinformation statements, total 0-13, median = 2), endorsement (13 statements, score 0-10, high scores indicate higher levels of endorsement, median = 5.75) of misinformation, vaccine hesitancy (14 items, score 1-5), and vaccination (two doses) were collected. Multivariable regression (adjusted β [aβ]) and Poisson regression (adjusted risk ratio [aRR]) adjusting for demographic characteristics were used to examine the associations of exposure to and endorsement of misinformation with vaccine hesitancy and vaccination. RESULTS A total of 71.8% of respondents had at least exposure to one vaccine misinformation, and 35.7% had a high level of endorsement (median or above). Respondents with lower SES had a lower exposure (≤2 statements, 57.1% vs 50.1%, P < 0.001) but a higher level of endorsement (36.6% vs 34.9%, P = 0.01) of misinformation. Overall, 72.9% had been vaccinated for two or more doses, with a lower proportion in respondents with lower SES (83.6% vs 61.1%; P < 0.001). Compared with no exposure to misinformation, high levels of exposure and endorsement were associated with vaccine hesitancy (aβ = 0.44, 95% confidence interval 0.40-0.48; aβ = 0.50, 0.47-0.54, respectively) and lower vaccination rates (aRR = 0.98, 0.97-0.99; aRR = 0.92, 0.88-0.96, respectively). Vaccine hesitancy mediated the associations of exposure (fully, 100%) and endorsement (partially, 73%) with vaccination uptake. CONCLUSION Endorsement of vaccine misinformation in respondents with lower SES was associated with low vaccination uptake.
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Affiliation(s)
- Y Yao
- School of Nursing, The University of Hong Kong, Hong Kong, China
| | - Y S Wu
- School of Nursing, The University of Hong Kong, Hong Kong, China
| | - X Weng
- Institute of Advanced Studies in Humanities and Social Science, Beijing Normal University (Zhuhai Campus), Zhuhai, China
| | - K Viswanath
- Dana-Farber Cancer Institute, Boston, MA, United States; Harvard T. H. Chan School of Public Health, Boston, MA, United States
| | - E W J Lee
- Wee Kim Wee School of Communication and Information, Nanyang Technological University, Singapore, Singapore
| | - M P Wang
- School of Nursing, The University of Hong Kong, Hong Kong, China.
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3
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Wu RN, Weng X, Guan H, Liu X. [Primary sarcoma with internal tandem duplication of BCOR in fibula: report of a case]. Zhonghua Bing Li Xue Za Zhi 2023; 52:865-868. [PMID: 37527999 DOI: 10.3760/cma.j.cn112151-20230304-00170] [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: 08/03/2023]
Affiliation(s)
- R N Wu
- Department of Pathology, the Shenzhen Second People's Hospital, Shenzhen 518035, China
| | - X Weng
- Department of Pathology, the Shenzhen Second People's Hospital, Shenzhen 518035, China
| | - H Guan
- Department of Pathology, the Shenzhen Second People's Hospital, Shenzhen 518035, China
| | - X Liu
- Department of Pathology, the Shenzhen Second People's Hospital, Shenzhen 518035, China
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4
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Wang X, Jiang X, Li B, Zheng J, Guo J, Gao L, Du M, Weng X, Li L, Chen S, Zhang J, Fang L, Liu T, Wang L, Liu W, Neculai D, Sun Q. A regulatory circuit comprising the CBP and SIRT7 regulates FAM134B-mediated ER-phagy. J Cell Biol 2023; 222:e202201068. [PMID: 37043189 PMCID: PMC10103787 DOI: 10.1083/jcb.202201068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2022] [Revised: 11/14/2022] [Accepted: 02/21/2023] [Indexed: 04/13/2023] Open
Abstract
Macroautophagy (autophagy) utilizes a serial of receptors to specifically recognize and degrade autophagy cargoes, including damaged organelles, to maintain cellular homeostasis. Upstream signals spatiotemporally regulate the biological functions of selective autophagy receptors through protein post-translational modifications (PTM) such as phosphorylation. However, it is unclear how acetylation directly controls autophagy receptors in selective autophagy. Here, we report that an ER-phagy receptor FAM134B is acetylated by CBP acetyltransferase, eliciting intense ER-phagy. Furthermore, FAM134B acetylation promoted CAMKII-mediated phosphorylation to sustain a mode of milder ER-phagy. Conversely, SIRT7 deacetylated FAM134B to temper its activities in ER-phagy to avoid excessive ER degradation. Together, this work provides further mechanistic insights into how ER-phagy receptor perceives environmental signals for fine-tuning of ER homeostasis and demonstrates how nucleus-derived factors are programmed to control ER stress by modulating ER-phagy.
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Affiliation(s)
- Xinyi Wang
- Department of Biochemistry, and Department of Cardiology of Second Affiliated Hospital, Zhejiang UniversitySchool of Medicine, Hangzhou, China
| | - Xiao Jiang
- Department of Biochemistry, and Department of Cardiology of Second Affiliated Hospital, Zhejiang UniversitySchool of Medicine, Hangzhou, China
| | - Boran Li
- Department of Biochemistry, and Department of Cardiology of Second Affiliated Hospital, Zhejiang UniversitySchool of Medicine, Hangzhou, China
- International Institutes of Medicine, The Fourth Affiliated Hospital of Zhejiang UniversitySchool of Medicine, Yiwu, China
| | - Jiahua Zheng
- Department of Biochemistry, and Department of Cardiology of Second Affiliated Hospital, Zhejiang UniversitySchool of Medicine, Hangzhou, China
- International Institutes of Medicine, The Fourth Affiliated Hospital of Zhejiang UniversitySchool of Medicine, Yiwu, China
| | - Jiansheng Guo
- Center of Cryo-Electron Microscopy, School of Medicine, Zhejiang University, Hangzhou, China
| | - Lei Gao
- Microscopy Core Facility, Westlake University, Hangzhou, China
| | - Mengjie Du
- Department of Neurology of Second Affiliated Hospital, Institute of Neuroscience, Mental Health Center, NHC and CAMS Key Laboratory of Medical Neurobiology, Zhejiang UniversitySchool of Medicine, Hangzhou, China
| | - Xialian Weng
- Department of Cell Biology, Department of General Surgery of Sir Run Run Shaw Hospital, Zhejiang UniversitySchool of Medicine, Hangzhou, China
| | - Lin Li
- National Institute of Biological Sciences, Beijing, Beijing, China
| | - She Chen
- National Institute of Biological Sciences, Beijing, Beijing, China
| | - Jingzi Zhang
- Jiangsu Key Laboratory of Molecular Medicine, Chemistry and Biomedicine Innovation Center, Medical School of Nanjing University, Nanjing, China
| | - Lei Fang
- Jiangsu Key Laboratory of Molecular Medicine, Chemistry and Biomedicine Innovation Center, Medical School of Nanjing University, Nanjing, China
| | - Ting Liu
- Department of Cell Biology, Department of General Surgery of Sir Run Run Shaw Hospital, Zhejiang UniversitySchool of Medicine, Hangzhou, China
| | - Liang Wang
- Department of Neurology of Second Affiliated Hospital, Institute of Neuroscience, Mental Health Center, NHC and CAMS Key Laboratory of Medical Neurobiology, Zhejiang UniversitySchool of Medicine, Hangzhou, China
| | - Wei Liu
- Department of Biochemistry, and Department of Cardiology of Second Affiliated Hospital, Zhejiang UniversitySchool of Medicine, Hangzhou, China
- International Institutes of Medicine, The Fourth Affiliated Hospital of Zhejiang UniversitySchool of Medicine, Yiwu, China
| | - Dante Neculai
- International Institutes of Medicine, The Fourth Affiliated Hospital of Zhejiang UniversitySchool of Medicine, Yiwu, China
- Department of Cell Biology, Department of General Surgery of Sir Run Run Shaw Hospital, Zhejiang UniversitySchool of Medicine, Hangzhou, China
| | - Qiming Sun
- Department of Biochemistry, and Department of Cardiology of Second Affiliated Hospital, Zhejiang UniversitySchool of Medicine, Hangzhou, China
- International Institutes of Medicine, The Fourth Affiliated Hospital of Zhejiang UniversitySchool of Medicine, Yiwu, China
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5
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Nassabein R, Weng X, Alameddine R, Blanc-Durand F, Belkaid W, Tehfe M, Florescu M, Routy B, Blais N. 1213P Clinical utility of liquid biopsy for the early diagnosis of EGFR mutant advanced lung cancer in a real-life setting (CLEAR). Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.1818] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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6
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Orellana Rivas RM, Marins TN, Weng X, Monteiro APA, Guo J, Gao J, Chen YC, Woldemeskel MW, Bernard JK, Tomlinson DJ, DeFrain JM, Tao S. Effects of evaporative cooling and dietary zinc source on heat shock responses and mammary gland development in lactating dairy cows during summer. J Dairy Sci 2021; 104:5021-5033. [PMID: 33516558 DOI: 10.3168/jds.2020-19146] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 06/23/2020] [Accepted: 11/02/2020] [Indexed: 12/20/2022]
Abstract
The objective of this study was to examine the effects of evaporative cooling and dietary supplemental Zn source on heat shock responses and mammary gland development of lactating dairy cows during summer. Seventy-two multiparous lactating Holstein cows were randomly assigned to 1 of 4 treatments in a 2 × 2 factorial arrangement. Cows were either cooled (CL) or not cooled (NC) and fed diets supplemented with 75 mg of Zn/kg of dry matter (DM) from Zn hydroxychloride (IOZ) or 35 mg of Zn/kg of DM from Zn hydroxychloride plus 40 mg of Zn/kg of DM from Zn-Met complex (ZMC). The 168-d trial included a 12-wk baseline phase when all cows were cooled and fed respective dietary treatments, and a subsequent 12-wk environmental challenge phase when NC cows were deprived of evaporative cooling. Plasma was collected from a subset of cows (n = 24) at 1, 3, 5, 12, 26, 41, 54, 68, 81 d of the environmental challenge to measure heat shock protein (HSP) 70 concentration. Mammary biopsies were collected from another subset of cows (n = 30) at enrollment (baseline samples) and at d 7 and 56 of the environmental challenge to analyze gene expression related to heat shock response, apoptosis and anti-oxidative enzymes, and to examine apoptosis and cell proliferation using immunohistochemistry. Supplemental Zn source did not affect milk yield but NC cows produced less milk than CL cows. Supplemental Zn source had no effect on mammary gene expression of HSP27, 70, and 90 or plasma concentrations of HSP70. The NC cows had greater mammary gene expression of HSP than CL cows. Circulating HSP70 of NC cows gradually increased and was higher at 81 d of environmental challenge compared with CL cows. Relative to IOZ, ZMC cows tended to have lower total mammary cell proliferation but greater mammary apoptosis. There was a tendency of greater TNFRSF1A mRNA expression for ZMC compared with IOZ cows, which may suggest upregulated extrinsic apoptosis. At d 7 of environmental challenge, NC cows had numerically higher mammary apoptosis than CL cows although not statistically significant. The NC cows tended to have greater mRNA expression of CAT and SOD3 regardless of time, and had greater mRNA expression of GPX1 at d 56 and FAS at d 7 of the environmental challenge than CL cows. Relative to CL cows, mammary cell proliferation rate was higher for NC cows at d 56 of the environmental challenge. In conclusion, dietary source of supplemental Zn has substantial effect on mammary cell turnover in lactating dairy cows, and prolonged exposure to heat stress increases mammary cell proliferation.
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Affiliation(s)
- R M Orellana Rivas
- Department of Animal and Dairy Science, University of Georgia, Tifton 31793
| | - T N Marins
- Department of Animal and Dairy Science, University of Georgia, Tifton 31793
| | - X Weng
- Department of Animal and Dairy Science, University of Georgia, Tifton 31793
| | - A P A Monteiro
- Department of Animal and Dairy Science, University of Georgia, Tifton 31793
| | - J Guo
- Department of Animal and Dairy Science, University of Georgia, Tifton 31793
| | - J Gao
- Department of Animal and Dairy Science, University of Georgia, Tifton 31793
| | - Y-C Chen
- Department of Animal and Dairy Science, University of Georgia, Tifton 31793
| | - M W Woldemeskel
- Department of Veterinary Pathology, Veterinary Diagnostic and Investigational Laboratory, University of Georgia, Tifton 31793
| | - J K Bernard
- Department of Animal and Dairy Science, University of Georgia, Tifton 31793
| | | | | | - S Tao
- Department of Animal and Dairy Science, University of Georgia, Tifton 31793.
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7
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Weng X, Yue W, Shang L, Wang D, Xu Y, Chen Y, Ge J. Inhibition of CD44 attenuates pressure overload-induced cardiac and lung inflammation, fibrosis, and heart failure progression. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.0878] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Inflammation contributes to heart failure (HF) development and progression. CD44 is a member of the hyaluronate receptor family of cell adhesion molecules, which regulates tissue inflammation and fibrosis through modulating macrophage and lymphocyte migration and homing in several diseases. Here we evaluated the role and cellular mechanism of CD44 in regulating transverse aortic constriction (TAC)-induced HF development and progression in mice.
Methods and results
C57/B6 background CD44 KO and wild type mice (6–8 weeks) were subjected to TAC to evaluate the effect of CD44 on the development of TAC-induced LV hypertrophy and cardiac dysfunction. Due to the rapid response to TAC, Balb/c mice (6–8 weeks) were used to determine the effect of CD44 on the progression of TAC-induced congestive heart failure. We found that CD44 expression is dramatically increased in left ventricular (LV) tissues obtained from HF patients and mice. While CD44 gene knockout (KO) has no detectable effect on cardiac structure and function under control conditions, CD44 KO mice were protected from TAC-induced LV inflammation, fibrosis, hypertrophy, dysfunction, and lung remodeling as compared with wild type mice. In addition, we found that inhibition of CD44 signaling with blocking antibodies (Abs) significantly attenuated the transition from LV failure to lung remodeling, and right ventricular hypertrophy in mice with existing HF.
Conclusions
These data identify an important role of CD44 in attenuating cardiac and lung inflammation, fibrosis, HF development, and HF progression, suggesting that inhibition of CD44 signaling may be useful in preventing and treating HF.
Funding Acknowledgement
Type of funding source: Public grant(s) – National budget only. Main funding source(s): Chinese National Natural Science Foundation Grants and American Heart Association
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Affiliation(s)
- X Weng
- Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, Shanghai, China
| | - W Yue
- Shanghai Tenth People's Hospital, Shanghai, China
| | - L Shang
- Shenyang Northern Hospital, Shenyang, China
| | - D Wang
- Shanghai Tenth People's Hospital, Shanghai, China
| | - Y Xu
- Shanghai Tenth People's Hospital, Shanghai, China
| | - Y Chen
- University of Mississippi Medical Center, Department of Physiology and Biophysics, Jackson, United States of America
| | - J Ge
- Zhongshan Hospital, Fudan University, Shanghai Institute of Cardiovascular Diseases, Shanghai, China
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8
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Wu TT, Yang YJ, Weng X, Liu X. [Low-grade ductal carcinoma in situ in breast fibroadenomas: a clinicopathological analysis of eight cases]. Zhonghua Bing Li Xue Za Zhi 2020; 49:1058-1060. [PMID: 32992424 DOI: 10.3760/cma.j.cn112151-20200114-00034] [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)
- T T Wu
- Department of Pathology, the Second People's Hospital of Shenzhen(the First Affiliated Hospital of Shenzhen University), Shenzhen 518035, China
| | - Y J Yang
- Department of Pathology, the Second People's Hospital of Shenzhen(the First Affiliated Hospital of Shenzhen University), Shenzhen 518035, China
| | - X Weng
- Department of Pathology, the Second People's Hospital of Shenzhen(the First Affiliated Hospital of Shenzhen University), Shenzhen 518035, China
| | - X Liu
- Department of Pathology, the Second People's Hospital of Shenzhen(the First Affiliated Hospital of Shenzhen University), Shenzhen 518035, China
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9
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Jiang X, Wang X, Ding X, Du M, Li B, Weng X, Zhang J, Li L, Tian R, Zhu Q, Chen S, Wang L, Liu W, Fang L, Neculai D, Sun Q. FAM134B oligomerization drives endoplasmic reticulum membrane scission for ER-phagy. EMBO J 2020; 39:e102608. [PMID: 31930741 DOI: 10.15252/embj.2019102608] [Citation(s) in RCA: 71] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2019] [Revised: 11/19/2019] [Accepted: 12/10/2019] [Indexed: 12/30/2022] Open
Abstract
Degradation of endoplasmic reticulum (ER) by selective autophagy (ER-phagy) is crucial for ER homeostasis. However, it remains unclear how ER scission is regulated for subsequent autophagosomal sequestration and lysosomal degradation. Here, we show that oligomerization of ER-phagy receptor FAM134B (also referred to as reticulophagy regulator 1 or RETREG1) through its reticulon-homology domain is required for membrane fragmentation in vitro and ER-phagy in vivo. Under ER-stress conditions, activated CAMK2B phosphorylates the reticulon-homology domain of FAM134B, which enhances FAM134B oligomerization and activity in membrane fragmentation to accommodate high demand for ER-phagy. Unexpectedly, FAM134B G216R, a variant derived from a type II hereditary sensory and autonomic neuropathy (HSAN) patient, exhibits gain-of-function defects, such as hyperactive self-association and membrane scission, which results in excessive ER-phagy and sensory neuron death. Therefore, this study reveals a mechanism of ER membrane fragmentation in ER-phagy, along with a signaling pathway in regulating ER turnover, and suggests a potential implication of excessive selective autophagy in human diseases.
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Affiliation(s)
- Xiao Jiang
- Department of Biochemistry, Department of Cardiology of Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Xinyi Wang
- Department of Biochemistry, Department of Cardiology of Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Xianming Ding
- Department of Biochemistry, Department of Cardiology of Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Mengjie Du
- Department of Neurology of Second Affiliated Hospital, Institute of Neuroscience, Mental Health Center, NHC and CAMS Key Laboratory of Medical Neurobiology, Zhejiang University School of Medicine, Hangzhou, China
| | - Boran Li
- Department of Biochemistry, Department of Cardiology of Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Xialian Weng
- Department of Cell Biology, Department of General Surgery of Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jingzi Zhang
- Jiangsu Key Laboratory of Molecular Medicine, Medical School of Nanjing University, Nanjing, China
| | - Lin Li
- National Institute of Biological Sciences, Beijing, China
| | - Rui Tian
- Department of Biochemistry, Department of Cardiology of Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Qi Zhu
- Department of Biochemistry, Department of Cardiology of Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - She Chen
- National Institute of Biological Sciences, Beijing, China
| | - Liang Wang
- Department of Neurology of Second Affiliated Hospital, Institute of Neuroscience, Mental Health Center, NHC and CAMS Key Laboratory of Medical Neurobiology, Zhejiang University School of Medicine, Hangzhou, China
| | - Wei Liu
- Department of Biochemistry, Department of Cardiology of Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Lei Fang
- Jiangsu Key Laboratory of Molecular Medicine, Medical School of Nanjing University, Nanjing, China
| | - Dante Neculai
- Department of Cell Biology, Department of General Surgery of Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Qiming Sun
- Department of Biochemistry, Department of Cardiology of Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, China
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10
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Lu Y, Zheng Y, Coyaud É, Zhang C, Selvabaskaran A, Yu Y, Xu Z, Weng X, Chen JS, Meng Y, Warner N, Cheng X, Liu Y, Yao B, Hu H, Xia Z, Muise AM, Klip A, Brumell JH, Girardin SE, Ying S, Fairn GD, Raught B, Sun Q, Neculai D. Palmitoylation of NOD1 and NOD2 is required for bacterial sensing. Science 2019; 366:460-467. [PMID: 31649195 DOI: 10.1126/science.aau6391] [Citation(s) in RCA: 95] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 07/19/2019] [Accepted: 10/03/2019] [Indexed: 12/21/2022]
Abstract
The nucleotide oligomerization domain (NOD)-like receptors 1 and 2 (NOD1/2) are intracellular pattern-recognition proteins that activate immune signaling pathways in response to peptidoglycans associated with microorganisms. Recruitment to bacteria-containing endosomes and other intracellular membranes is required for NOD1/2 signaling, and NOD1/2 mutations that disrupt membrane localization are associated with inflammatory bowel disease and other inflammatory conditions. However, little is known about this recruitment process. We found that NOD1/2 S-palmitoylation is required for membrane recruitment and immune signaling. ZDHHC5 was identified as the palmitoyltransferase responsible for this critical posttranslational modification, and several disease-associated mutations in NOD2 were found to be associated with defective S-palmitoylation. Thus, ZDHHC5-mediated S-palmitoylation of NOD1/2 is critical for their ability to respond to peptidoglycans and to mount an effective immune response.
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Affiliation(s)
- Yan Lu
- Department of Cell Biology, and Department of Pathology Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.,Keenan Research Centre for Biomedical Sciences, St. Michael's Hospital, Toronto, ON, Canada
| | - Yuping Zheng
- Department of Cell Biology, and Department of Pathology Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Étienne Coyaud
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada
| | - Chao Zhang
- Department of Anatomy, School of Medicine, Zhejiang University, China School of Medicine, Zhejiang University, Hangzhou 310058, China.,Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital of Zhejiang University School of Medicine, Hangzhou, China
| | - Apiraam Selvabaskaran
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada
| | - Yuyun Yu
- Department of Cell Biology, and Department of Pathology Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Zizhen Xu
- Department of Cell Biology, and Department of Pathology Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Xialian Weng
- Department of Cell Biology, and Department of Pathology Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Ji Shun Chen
- Department of Cell Biology, and Department of Pathology Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Ying Meng
- Department of Cell Biology, and Department of Pathology Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Neil Warner
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, ON, Canada
| | - Xiawei Cheng
- Department of Biochemistry, and Department of Cardiology of Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China
| | - Yangyang Liu
- Department of Pathology, School of Medicine, Zhejiang University, Hangzhou 310058, China
| | - Bingpeng Yao
- Department of Pharmacology and Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital, Institute of Respiratory Diseases, Zhejiang University School of Medicine, Hangzhou 310009, China
| | - Hu Hu
- Department of Pathology, School of Medicine, Zhejiang University, Hangzhou 310058, China
| | - Zonping Xia
- Translational Medicine Center, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan 450052, China
| | - Aleixo M Muise
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, ON, Canada
| | - Amira Klip
- Cell Biology Program, Research Institute, The Hospital for Sick Children, Peter Gilgan Centre for Research and Learning (PGCRL), Toronto, ON, Canada
| | - John H Brumell
- SickKids Inflammatory Bowel Disease Center and Cell Biology Program, Research Institute, Hospital for Sick Children, Toronto, ON, Canada.,Department of Molecular Genetics and Institute of Medical Science, University of Toronto, Toronto, ON, Canada
| | - Stephen E Girardin
- Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, ON, Canada
| | - Songmin Ying
- Department of Pharmacology and Key Laboratory of Respiratory Disease of Zhejiang Province, Department of Respiratory and Critical Care Medicine, Second Affiliated Hospital, Institute of Respiratory Diseases, Zhejiang University School of Medicine, Hangzhou 310009, China
| | - Gregory D Fairn
- Keenan Research Centre for Biomedical Sciences, St. Michael's Hospital, Toronto, ON, Canada.
| | - Brian Raught
- Princess Margaret Cancer Centre, University Health Network, Toronto, ON, Canada. .,Department of Medical Biophysics, University of Toronto, Toronto, ON, Canada
| | - Qiming Sun
- Department of Biochemistry, and Department of Cardiology of Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou 310058, China.
| | - Dante Neculai
- Department of Cell Biology, and Department of Pathology Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China.
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11
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Yin Z, Cai M, Weng X, Liu Z, Zhang G. Porcine insulin receptor substrate 2: molecular cloning, tissues distribution, and functions in hepatocyte and aortic endothelial cells. Pol J Vet Sci 2019; 22:589-598. [PMID: 31560477 DOI: 10.24425/pjvs.2019.129968] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Insulin receptor substrate 2 (IRS-2) modulates the phosphatidylinositol 3-kinase (PI3K)/Akt pathway, which controls the suppression of gluconeogenic genes; IRS-2 is also a critical node of insulin signaling. Because of the high homology between pig and human IRS-2, we investigated the expression pattern and function of porcine IRS-2. QPCR and immunoblotting were used to detect the IRS-2 expression level in different tissues. There were high IRS-2 levels in the cerebral cortex, hypothalamus, and cerebellum in the central nervous system. In peripheral tissues, IRS-2 was expressed at relatively high levels in the liver. Immunohistochemistry analysis revealed that IRS-2 was mainly distributed in the hypothalamus and cerebral cortex. Furthermore, IRS-2 knockdown porcine hepatocytes and porcine aortic endothelial cells (PAECs) were generated. The IRS-2 knockdown induced abnormal expression of genes involved in glycolipid metabolism in hepatocytes and reduced the antiatherosclerosis ability in PAECs. In addition, we disrupted IRS-2 in porcine embryonic fibroblasts (PEFs) using the CRISPR/Cas9 genome editing system, before finally generating IRS-2 knockout embryos by somatic cell nuclear transfer (SCNT). Taken together, our results indicate that IRS-2 might be a valuable target to establish diabetes and vascular disease models in the pig.
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Affiliation(s)
- Z Yin
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China.,Key Laboratory of Animal Cellular and Genetics Engineering of Heilongjiang Province, College of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - M Cai
- Key Laboratory of Animal Cellular and Genetics Engineering of Heilongjiang Province, College of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - X Weng
- Key Laboratory of Animal Cellular and Genetics Engineering of Heilongjiang Province, College of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - Z Liu
- Key Laboratory of Animal Cellular and Genetics Engineering of Heilongjiang Province, College of Life Science, Northeast Agricultural University, Harbin 150030, China
| | - G Zhang
- College of Animal Science and Technology, Northeast Agricultural University, Harbin 150030, China
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Heybrock S, Kanerva K, Meng Y, Ing C, Liang A, Xiong ZJ, Weng X, Ah Kim Y, Collins R, Trimble W, Pomès R, Privé GG, Annaert W, Schwake M, Heeren J, Lüllmann-Rauch R, Grinstein S, Ikonen E, Saftig P, Neculai D. Lysosomal integral membrane protein-2 (LIMP-2/SCARB2) is involved in lysosomal cholesterol export. Nat Commun 2019; 10:3521. [PMID: 31387993 PMCID: PMC6684646 DOI: 10.1038/s41467-019-11425-0] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2018] [Accepted: 07/12/2019] [Indexed: 11/30/2022] Open
Abstract
The intracellular transport of cholesterol is subject to tight regulation. The structure of the lysosomal integral membrane protein type 2 (LIMP-2, also known as SCARB2) reveals a large cavity that traverses the molecule and resembles the cavity in SR-B1 that mediates lipid transfer. The detection of cholesterol within the LIMP-2 structure and the formation of cholesterol-like inclusions in LIMP-2 knockout mice suggested the possibility that LIMP2 transports cholesterol in lysosomes. We present results of molecular modeling, crosslinking studies, microscale thermophoresis and cell-based assays that support a role of LIMP-2 in cholesterol transport. We show that the cavity in the luminal domain of LIMP-2 can bind and deliver exogenous cholesterol to the lysosomal membrane and later to lipid droplets. Depletion of LIMP-2 alters SREBP-2-mediated cholesterol regulation, as well as LDL-receptor levels. Our data indicate that LIMP-2 operates in parallel with Niemann Pick (NPC)-proteins, mediating a slower mode of lysosomal cholesterol export.
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Affiliation(s)
- Saskia Heybrock
- Biochemisches Institut, Christian-Albrechts-Universität Kiel, Kiel, Germany
| | - Kristiina Kanerva
- Faculty of Medicine, Anatomy and Stem Cells and Metabolism Research Program, University of Helsinki, Helsinki, Finland
- Minerva Foundation Institute for Medical Research, Helsinki, Finland
| | - Ying Meng
- Department of Cell Biology, and Department of Pathology Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, P.R. China
| | - Chris Ing
- Program in Molecular Medicine, Research Institute, The Hospital for Sick Children, Toronto, Ontario, M5G 0A4, Canada
- Department of Biochemistry, University of Toronto, Toronto, M5S 1A8, Canada
| | - Anna Liang
- Program in Molecular Medicine, Research Institute, The Hospital for Sick Children, Toronto, Ontario, M5G 0A4, Canada
- Department of Biochemistry, University of Toronto, Toronto, M5S 1A8, Canada
| | - Zi-Jian Xiong
- Department of Biochemistry, University of Toronto, Toronto, M5S 1A8, Canada
| | - Xialian Weng
- Department of Cell Biology, and Department of Pathology Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, P.R. China
| | - Young Ah Kim
- Department of Chemistry and Biochemistry, Queens College, City University of New York, Flushing, New York, USA
| | - Richard Collins
- Cell Biology Program, Hospital for Sick Children, Toronto, M5G 1X8, Canada
| | - William Trimble
- Department of Biochemistry, University of Toronto, Toronto, M5S 1A8, Canada
- Cell Biology Program, Hospital for Sick Children, Toronto, M5G 1X8, Canada
- Department of Physiology, University of Toronto, Toronto, M5S 1A8, Canada
| | - Régis Pomès
- Program in Molecular Medicine, Research Institute, The Hospital for Sick Children, Toronto, Ontario, M5G 0A4, Canada
- Department of Biochemistry, University of Toronto, Toronto, M5S 1A8, Canada
| | - Gilbert G Privé
- Department of Biochemistry, University of Toronto, Toronto, M5S 1A8, Canada
- Princes Margaret Cancer Centre, Toronto, ON, Canada
| | - Wim Annaert
- Laboratory for Membrane Trafficking, VIB-Center for Brain and Disease Research, Leuven, Belgium
| | - Michael Schwake
- Faculty of Chemistry, Biochemistry III, University of Bielefeld, 33615, Bielefeld, Germany
- Department of Neurology, Northwestern University Feinberg School of Medicine, Chicago, IL, 60611, USA
| | - Joerg Heeren
- Institut für Biochemie und Molekulare Zellbiologie, Zentrum für Experimentelle Medizin, Universitätsklinikum Hamburg-Eppendorf, Hamburg-Eppendorf, Germany
| | | | - Sergio Grinstein
- Department of Biochemistry, University of Toronto, Toronto, M5S 1A8, Canada.
- Cell Biology Program, Hospital for Sick Children, Toronto, M5G 1X8, Canada.
| | - Elina Ikonen
- Faculty of Medicine, Anatomy and Stem Cells and Metabolism Research Program, University of Helsinki, Helsinki, Finland.
- Minerva Foundation Institute for Medical Research, Helsinki, Finland.
| | - Paul Saftig
- Biochemisches Institut, Christian-Albrechts-Universität Kiel, Kiel, Germany.
| | - Dante Neculai
- Department of Cell Biology, and Department of Pathology Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, P.R. China.
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Li Z, Du Y, Xiang S, Feng B, Bian Y, Qian W, Jin J, Lin J, Weng X. Risk factors of perioperative complications and transfusion following total hip arthroplasty in systemic lupus erythematosus patients. Lupus 2019; 28:1134-1140. [PMID: 31296142 DOI: 10.1177/0961203319862609] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
BACKGROUND In recent years, hip arthroplasty rates in systemic lupus erythematosus (SLE) patients have been increasing rapidly. Although patients with SLE generally show beneficial or desirable functional outcomes following total hip arthroplasty (THA), it has been reported that SLE patients after THA have increased risk of postoperative complications, especially during the period of hospitalization. OBJECTIVES In the present study, we aimed to identify possible factors associated with complications or transfusion of THA in SLE patients during hospitalization. METHODS The present study was a retrospective study conducted in Peking Union Medical College Hospital. Data were collected from medical records of patients who underwent THA from January 2012 to June 2018. The primary outcome variable was perioperative complications, which was defined as having one or more of the following conditions: high fever, infection, impaired wound healing, venous thrombosis of the lower extremities, hematoma, arrhythmia, implant complications. The secondary outcome was perioperative transfusion. RESULTS During January 2012 to June 2018, 100 patients had taken the surgery of THA. After multivariate analysis, independent risk factors for perioperative complications were: age ≥ 45 years (p = 0.001), SLE with other connective tissue diseases (p = 0.029), high temperature (p = 0.030), positive anti-dsDNA antibody (p = 0.043), and Systemic Lupus International Collaborative Clinics/American College of Rheumatology (SLICC/ACR) Damage Index ≥ 3 (p = 0.008). Independent risk factors for perioperative transfusion were bilateral THA (p = 0.029), low hemoglobin (p = 0.021) and abnormal renal function (p = 0.021). CONCLUSION For SLE patients following THA, age > 45 years, SLE with other connective tissue disease, high temperature, positive anti-dsDNA antibody and SLICC/ACR Damage Index ≥ 3 were the risk factors of complications during hospitalization and bilateral THA, low hemoglobin and abnormal renal function were the risk factors of transfusion.
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Affiliation(s)
- Z Li
- 1 Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Science, Beijing, China
| | - Y Du
- 2 Office of Clinical Epidemiology, Obstetrics and Gynecology Hospital of Fudan University, Shanghai, China
| | - S Xiang
- 3 Department of Joint Surgery, The Affiliated Hospital of Qingdao University, China
| | - B Feng
- 1 Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Science, Beijing, China
| | - Y Bian
- 1 Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Science, Beijing, China
| | - W Qian
- 1 Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Science, Beijing, China
| | - J Jin
- 1 Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Science, Beijing, China
| | - J Lin
- 1 Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Science, Beijing, China
| | - X Weng
- 1 Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Science, Beijing, China
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Wu TT, Zhang M, Weng X, Guan H, Liu X. [Pulmonary fibroleiomyomatous hamartomas: report of a case]. Zhonghua Bing Li Xue Za Zhi 2019; 48:325-327. [PMID: 30955274 DOI: 10.3760/cma.j.issn.0529-5807.2019.04.015] [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)
- T T Wu
- Department of Pathology, the Second People's Hospital of Shenzhen, Shenzhen 518000, China
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15
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Tabchi S, Forte S, Alameddine R, Khazzaka A, Florescu M, Kassouf E, Weng X, Tehfe M, Blais N. P1.13-19 Treatment Cessation for Improved Detection of EGFR-Mutated Circulating Tumor DNA in Advanced Non-Small Cell Lung Cancer (aNSCLC). J Thorac Oncol 2018. [DOI: 10.1016/j.jtho.2018.08.876] [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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Djouhri L, Smith T, Alotaibi M, Weng X. Membrane potential oscillations are not essential for spontaneous firing generation in L4 Aβ-afferent neurons after L5 spinal nerve axotomy and are not mediated by HCN channels. Exp Physiol 2018; 103:1145-1156. [PMID: 29860719 DOI: 10.1113/ep087013] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Accepted: 05/23/2018] [Indexed: 01/01/2023]
Abstract
NEW FINDINGS What is the central question of this study? Is spontaneous activity (SA) in L4 dorsal root ganglion (DRG) neurons induced by L5 spinal nerve axotomy associated with membrane potential oscillations in these neurons, and if so, are these membrane oscillations mediated by HCN channels? What is the main finding and its importance? Unlike injured L5 DRG neurons, which have been shown to be incapable of firing spontaneously without membrane potential oscillations, membrane potential oscillations are not essential for SA generation in conducting 'uninjured' L4 neurons, and they are not mediated by HCN channels. These findings suggest that the underlying cellular mechanisms of SA in injured and 'uninjured' DRG neurons induced by spinal nerve injury are distinct. ABSTRACT The underlying cellular and molecular mechanisms of peripheral neuropathic pain are not fully understood. However, preclinical studies using animal models suggest that this debilitating condition is driven partly by aberrant spontaneous activity (SA) in injured and uninjured dorsal root ganglion (DRG) neurons, and that SA in injured DRG neurons is triggered by subthreshold membrane potential oscillations (SMPOs). Here, using in vivo intracellular recording from control L4-DRG neurons, and ipsilateral L4-DRG neurons in female Wistar rats that had previously undergone L5 spinal nerve axotomy (SNA), we examined whether conducting 'uninjured' L4-DRG neurons in SNA rats exhibit SMPOs, and if so, whether such SMPOs are associated with SA in those L4 neurons, and whether they are mediated by hyperpolarization-activated cyclic nucleotide gated (HCN) channels. We found that 7 days after SNA: (a) none of the control A- or C-fibre DRG neurons showed SMPOs or SA, but 50%, 43% and 0% of spontaneously active cutaneous L4 Aβ-low threshold mechanoreceptors, Aβ-nociceptors and C-nociceptors exhibited SMPOs, respectively, in SNA rats with established neuropathic pain behaviors; (b) neither SMPOs nor SA in L4 Aβ-neurons was suppressed by blocking HCN channels with ZD7288 (10 mg kg-1 , i.v.); and (c) there is a tendency for female rats to show greater pain hypersensitivity than male rats. These results suggest that SMPOs are linked to SA only in some of the conducting L4 Aβ-neurons, that such oscillations are not a prerequisite for SA generation in those L4 A- or C-fibre neurons, and that HCN channels are not involved in their electrogenesis.
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Affiliation(s)
- L Djouhri
- Department of Physiology, College of Medicine, Alfaisal University, PO Box 50927, Riyadh, 11533, Saudi Arabia
| | - T Smith
- Wolfson CARD, Neurorestoration Group, Hodgkin Building, King's College London, Guy's Campus, London, SE1 1UL, UK
| | - M Alotaibi
- Department of Physiology, College of Medicine, King Saud University, PO Box 7805, Riyadh, 11472, Saudi Arabia
| | - X Weng
- Department of Neurobiology and State Key Laboratory of Proteomics, Beijing Institute of Basic Medical Sciences, Beijing, 100850, China
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17
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Tao S, Orellana R, Weng X, Marins T, Dahl G, Bernard J. Symposium review: The influences of heat stress on bovine mammary gland function. J Dairy Sci 2018; 101:5642-5654. [DOI: 10.3168/jds.2017-13727] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Accepted: 11/25/2017] [Indexed: 12/15/2022]
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18
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Hennes M, Schuler V, Weng X, Buchwald J, Demaille D, Zheng Y, Vidal F. Growth of vertically aligned nanowires in metal-oxide nanocomposites: kinetic Monte-Carlo modeling versus experiments. Nanoscale 2018; 10:7666-7675. [PMID: 29651470 DOI: 10.1039/c7nr08974k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
We employ kinetic Monte-Carlo simulations to study the growth process of metal-oxide nanocomposites obtained via sequential pulsed laser deposition. Using Ni-SrTiO3 (Ni-STO) as a model system, we reduce the complexity of the computational problem by choosing a coarse-grained approach mapping Sr, Ti and O atoms onto a single effective STO pseudo-atom species. With this ansatz, we scrutinize the kinetics of the sequential synthesis process, governed by alternating deposition and relaxation steps, and analyze the self-organization propensity of Ni atoms into straight vertically aligned nanowires embedded in the surrounding STO matrix. We finally compare the predictions of our binary toy model with experiments and demonstrate that our computational approach captures fundamental aspects of self-assembled nanowire synthesis. Despite its simplicity, our modeling strategy successfully describes the impact of relevant parameters like the concentration or laser frequency on the final nanoarchitecture of metal-oxide thin films grown via pulsed laser deposition.
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Affiliation(s)
- M Hennes
- Sorbonne Université, CNRS-UMR 7588, Institut des NanoSciences de Paris, INSP, F-75005 Paris, France.
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Zhang K, Li C, Weng X, Su J, Shen L, Pan G, Long D, Zhao A, Cui H. Transgenic characterization of two silkworm tissue-specific promoters in the haemocyte plasmatocyte cells. Insect Mol Biol 2018; 27:133-142. [PMID: 29131435 DOI: 10.1111/imb.12360] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Haemocytes play crucial roles in insect metabolism, metamorphosis, and innate immunity. As a model of lepidopteran insects, the silkworm is a useful model to study the functions of both haematopoiesis and haemocytes. Tissue-specific promoters are excellent tools for genetic manipulation and are widely used in fundamental biological research. Herein, two haemocyte-specific genes, Integrin β2 and Integrin β3, were confirmed. Promoter activities of Integrin β2 and Integrin β3 were evaluated by genetic manipulation. Quantitative real-time PCR and western blotting suggested that both promoters can drive enhanced green fluorescent protein (EGFP) specifically expressed in haemocytes. Further evidence clearly demonstrated that the transgenic silkworm exhibited a high level of EGFP signal in plasmatocytes, but not in other detected haemocyte types. Moreover, EGFP fluorescence signals were observed in the haematopoietic organ of both transgenic strains. Thus, two promoters that enable plasmatocytes to express genes of interest were confirmed in our study. It is expected that the results of this study will facilitate advances in our understanding of insect haematopoiesis and immunity in the silkworm, Bombyx mori.
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Affiliation(s)
- K Zhang
- State Key Laboratory of Silkworm Genome Biology, The Institute of Sericulture and Systems Biology, Southwest University, Chongqing, China
| | - C Li
- State Key Laboratory of Silkworm Genome Biology, The Institute of Sericulture and Systems Biology, Southwest University, Chongqing, China
| | - X Weng
- State Key Laboratory of Silkworm Genome Biology, The Institute of Sericulture and Systems Biology, Southwest University, Chongqing, China
- College of Biotechnology, Southwest University, Chongqing, China
| | - J Su
- State Key Laboratory of Silkworm Genome Biology, The Institute of Sericulture and Systems Biology, Southwest University, Chongqing, China
| | - L Shen
- State Key Laboratory of Silkworm Genome Biology, The Institute of Sericulture and Systems Biology, Southwest University, Chongqing, China
| | - G Pan
- State Key Laboratory of Silkworm Genome Biology, The Institute of Sericulture and Systems Biology, Southwest University, Chongqing, China
| | - D Long
- State Key Laboratory of Silkworm Genome Biology, The Institute of Sericulture and Systems Biology, Southwest University, Chongqing, China
| | - A Zhao
- State Key Laboratory of Silkworm Genome Biology, The Institute of Sericulture and Systems Biology, Southwest University, Chongqing, China
| | - H Cui
- State Key Laboratory of Silkworm Genome Biology, The Institute of Sericulture and Systems Biology, Southwest University, Chongqing, China
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Weng X, Monteiro APA, Guo J, Li C, Orellana RM, Marins TN, Bernard JK, Tomlinson DJ, DeFrain JM, Wohlgemuth SE, Tao S. Effects of heat stress and dietary zinc source on performance and mammary epithelial integrity of lactating dairy cows. J Dairy Sci 2017; 101:2617-2630. [PMID: 29290442 DOI: 10.3168/jds.2017-13484] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Accepted: 11/09/2017] [Indexed: 12/17/2022]
Abstract
Dietary Zn and heat stress alter gut integrity in monogastric animals. However, effects of Zn on mammary epithelial integrity in heat-stressed lactating dairy cows have not been studied. Multiparous lactating Holstein cows (n = 72) were randomly assigned to 1 of 4 treatments with a 2 × 2 factorial arrangement to study the effects of environment and Zn source on performance and mammary epithelial integrity. Treatments included 2 environments [cooled (CL) or not cooled (NC)] and 2 Zn sources [75 mg/kg of supplemental Zn as Zn hydroxychloride (IOZ) or 35 mg/kg of Zn hydroxychloride + 40 mg/kg of Zn-Met complex (ZMC)]. The experiment was divided into baseline and environmental challenge phases of 84 d each. All cows were cooled during the baseline phase (temperature-humidity index = 72.5), whereas NC cows were not cooled during environmental challenge (temperature-humidity index = 77.7). Mammary biopsies were collected on d 7 and 56 relative to the onset of environmental challenge to analyze gene expression of claudin 1, 4, and 8, zonula occludens 1, 2, and 3, occludin, and E-cadherin and protein expression of occludin and E-cadherin. Deprivation of cooling increased respiration rate (64.8 vs. 73.9 breaths/min) and vaginal temperature (39.03 vs. 39.94°C) and decreased dry matter intake (26.7 vs. 21.6 kg/d). Energy-corrected milk yield decreased for NC cows relative to CL cows (24.5 vs. 34.1 kg/d). An interaction between environment and Zn source occurred for milk fat content as CL cows fed ZMC had lower milk fat percentage than other groups. Relative to CL cows, NC cows had lower concentrations of lactose (4.69 vs. 4.56%) and solids-not-fat (8.46 vs. 8.32%) but a higher concentration of milk urea nitrogen (9.07 vs. 11.02 mg/mL). Compared with IOZ, cows fed ZMC had lower plasma lactose concentration during baseline and tended to have lower plasma lactose concentration during environmental challenge. Plasma lactose concentration tended to increase at 3, 5, and 41 d after the onset of environmental challenge in NC cows relative to CL cows. Treatment had no effect on milk BSA concentration. Cows fed ZMC tended to have higher gene expression of E-cadherin relative to IOZ. Compared with CL, NC cows had increased gene expression of occludin and E-cadherin and tended to have increased claudin 1 and zonula occludens 1 and 2 gene expression in the mammary gland. Protein expression of occludin and E-cadherin was unchanged. In conclusion, removing active cooling impairs lactation performance and affects gene expression of proteins involved in the mammary epithelial barrier, and feeding a portion of dietary zinc as ZMC improves the integrity of the mammary epithelium.
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Affiliation(s)
- X Weng
- Department of Animal and Dairy Science, University of Georgia, Tifton 31793
| | - A P A Monteiro
- Department of Animal and Dairy Science, University of Georgia, Tifton 31793
| | - J Guo
- Department of Animal and Dairy Science, University of Georgia, Tifton 31793
| | - C Li
- Department of Animal Sciences, University of Florida, Gainesville 32611
| | - R M Orellana
- Department of Animal and Dairy Science, University of Georgia, Tifton 31793
| | - T N Marins
- Department of Animal and Dairy Science, University of Georgia, Tifton 31793
| | - J K Bernard
- Department of Animal and Dairy Science, University of Georgia, Tifton 31793
| | | | | | - S E Wohlgemuth
- Department of Animal Sciences, University of Florida, Gainesville 32611
| | - S Tao
- Department of Animal and Dairy Science, University of Georgia, Tifton 31793.
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Yang L, Lv Z, Xia W, Zhang W, Xin Y, Yuan H, Chen Y, Hu X, Lv Y, Xu Q, Weng X, Ni C. The effect of aspirin on circulating tumor cells in metastatic colorectal and breast cancer patients: a phase II trial study. Clin Transl Oncol 2017; 20:912-921. [PMID: 29243075 DOI: 10.1007/s12094-017-1806-z] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Accepted: 11/09/2017] [Indexed: 12/13/2022]
Abstract
PURPOSE Aspirin could reduce the risk of cancer metastasis. Circulating tumor cells (CTCs) are a key factor of cancer metastasis, but no evidence has revealed how aspirin affects CTCs and its epithelial-mesenchymal transition (EMT). Here, we conducted a clinical trial to investigate how aspirin affects CTCs in metastatic colorectal cancer (MCC) and breast cancer patients (MBC). METHODS The trial is retrospective registered at clinicaltrials.gov (NCT02602938). The eligible patients are given 100 mg aspirin q.d. for 8 weeks, and CTCs are evaluated at baseline, 4 and 8 weeks for absolute number, phenotype (epithelial type, E+, mesenchymal type, M+, and biophenotypic type, B+), and vimentin expression. RESULTS Data on 21 MCC and 19 MBC patients are analyzed, and it revealed that the CTC numbers decreased with aspirin treatment in MCC (p < 0.001) but not MBC (p = 0.0532); besides, ratio of E+ CTCs increased (p = 0.037) and M+ CTCs decreased at 2 months in MCC (p = 0.013), but neither the ratio of E+ or M+ CTCs changes significantly in MBC; vimentin expression of M+ CTCs is higher than E+ and B+ CTCs either in MBC or MCC patients at baseline (p < 0.01); and aspirin suppresses the vimentin expression in M+ (p = 0.002)and B+ (p = 0.006) CTCs of MCC and M+ CTCs of MBC (p = 0.004); besides it find vimentin expression in B+ (p = 0.004) or M+ (p < 0.001), CTCs are markedly decreased in patients with total CTC numbers declined. CONCLUSION Aspirin could decrease CTCs numbers and block EMT transition in MCC patients and part of MBC patients.
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Affiliation(s)
- L Yang
- Key Laboratory of Tumor Molecular Diagnosis and Individualized Medicine of Zhejiang Province, Key Laboratory of Gastroenterology of Zhejiang Province, Zhejiang Provincial People's Hospital, Hangzhou Medicine College, Hangzhou, 310014, Zhejiang, People's Republic of China
| | - Z Lv
- Department of Breast and Thyroid Surgery, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, 310014, Zhejiang, People's Republic of China
| | - W Xia
- Department of Breast and Thyroid Surgery, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, 310014, Zhejiang, People's Republic of China
| | - W Zhang
- Department of Endocrinology, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, Zhejiang, 310014, People's Republic of China
| | - Y Xin
- Department of Breast and Thyroid Surgery, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, 310014, Zhejiang, People's Republic of China
| | - H Yuan
- Department of Breast and Thyroid Surgery, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, 310014, Zhejiang, People's Republic of China
| | - Y Chen
- Department of Oncology, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, 310014, Zhejiang, People's Republic of China
| | - X Hu
- Department of Anus and Intestine Surgery, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, 310014, Zhejiang, People's Republic of China
| | - Y Lv
- SurExam Bio-Tech, Guangzhou Technology Innovation Base, Science City, Guangzhou, People's Republic of China
| | - Q Xu
- Department of Breast and Thyroid Surgery, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, 310014, Zhejiang, People's Republic of China
| | - X Weng
- Department of General Surgery, Central Hospital of Haining, Zhejiang, 310000, People's Republic of China
| | - C Ni
- Key Laboratory of Tumor Molecular Diagnosis and Individualized Medicine of Zhejiang Province, Key Laboratory of Gastroenterology of Zhejiang Province, Zhejiang Provincial People's Hospital, Hangzhou Medicine College, Hangzhou, 310014, Zhejiang, People's Republic of China. .,Department of Breast and Thyroid Surgery, Zhejiang Provincial People's Hospital, People's Hospital of Hangzhou Medical College, Hangzhou, 310014, Zhejiang, People's Republic of China.
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Weng X, Monteiro A, Guo J, Ahmed B, Bernard J, Tomlinson D, DeFrain J, Dahl G, Tao S. Short communication: Repeated mammary tissue collections during lactation do not alter subsequent milk yield or composition. J Dairy Sci 2017; 100:8422-8425. [DOI: 10.3168/jds.2017-12889] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2017] [Accepted: 06/06/2017] [Indexed: 11/19/2022]
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Abstract
A novel antioxidant, butylated caffeic acid (BCA) was rationally designed by adding a tert-butyl group to caffeic acid, which was synthesized at a high yield (36.2%) from 2-methoxy-4-methylphenol by a four-step reaction including Friedel-Crafts alkylation, bromine oxidation, ether bond hydrolysis and Knoevenagel condensation. Its antioxidant capacity was much stronger than common commercial antioxidant tert-butyl hydroquinone (TBHQ) and its mother compound, caffeic acid, in both rancimat and deep frying tests. When investigated via the DPPH method, the antioxidant capacity of BCA was almost equal to TBHQ, but lower than caffeic acid. BCA could be a potentially strong antioxidant, especially for food processing at high temperatures such as deep frying and baking.
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Cui L, Chen L, Xia W, Jiang Y, Cui L, Huang W, Wang W, Wang X, Pei Y, Zheng X, Wang Q, Ning Z, Li M, Wang O, Xing X, Lin Q, Yu W, Weng X, Xu L, Cummings SR. Vertebral fracture in postmenopausal Chinese women: a population-based study. Osteoporos Int 2017; 28:2583-2590. [PMID: 28560474 DOI: 10.1007/s00198-017-4085-1] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [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: 01/08/2017] [Accepted: 05/08/2017] [Indexed: 01/16/2023]
Abstract
UNLABELLED In a random sample of postmenopausal Chinese women, the prevalence of radiographic vertebral fractures increased from 13% between ages 50 and 59 to over 50% after age 80 years. A model with seven clinical risk factors predicted the probability of vertebral fractures as well with as without BMD and better than a model with only three risk factors. More than half an hour of outdoor activity per day might correlate with lower risk of vertebral fracture in this population. INTRODUCTION We aimed to describe the prevalence and develop a model for prediction of radiographic vertebral fractures in a large random sample of postmenopausal Chinese women. METHODS We enrolled 1760 women from an age-stratified random sample of postmenopausal women in Beijing, China. The presence of vertebral fracture was assessed by semi-quantitative grading of lateral thoracolumbar radiographs, risk factors by interview, bone mineral density (BMD) of the proximal femur and lumbar spine by dual x-ray absorptiometry (DXA), and markers of bone turnover from a fasting blood sample. Associations of these factors were analyzed in logistic models and discrimination by areas of receiver operating characteristics curves (AUC). RESULTS The prevalence of vertebral fracture, ranged from 13.4% ages 50 to 59 years old to 58.1% at age 80 years or older. Older age, a history of non-vertebral fracture, lower femoral neck BMD T-score, body mass index (BMI), height loss, housework, and less than half an hour of outdoor activity were significantly associated with increased probability of having a vertebral fracture. A model with those seven factors had a similar AUC with or without BMD and performed better than a simple model with three factors. CONCLUSION This study is from a true random sample of postmenopausal women in urban China with high response rate. The prevalence of vertebral fractures in postmenopausal women in Beijing increases from 13% under age 60 to over 50% by age 80 years. A model with seven clinical risk factors with or without BMD is better than simple models and may guide the use of spine x-rays to identify women with vertebral fractures. More than half an hour of outdoor activity might correlate with lower risk of vertebral fracture in this population.
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Affiliation(s)
- L Cui
- Department of Endocrinology, Key Laboratory of Endocrinology, Ministry of Health, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, 100730, China
- Department of Surgery, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, 100730, China
| | - L Chen
- Department of Endocrinology, Key Laboratory of Endocrinology, Ministry of Health, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, 100730, China
| | - W Xia
- Department of Endocrinology, Key Laboratory of Endocrinology, Ministry of Health, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, 100730, China.
| | - Y Jiang
- Department of Endocrinology, Key Laboratory of Endocrinology, Ministry of Health, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, 100730, China
| | - L Cui
- Department of Endocrinology, Key Laboratory of Endocrinology, Ministry of Health, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, 100730, China
| | - W Huang
- Department of Endocrinology, BeiJing HaiDian Hospital, Beijing, 100080, China
| | - W Wang
- Department of Endocrinology, Peking University Shougang Hospital, Beijing, 100144, China
| | - X Wang
- Department of Cadre Unit, General Hospital of the Second Artillery Force, Beijing, 100088, China
| | - Y Pei
- Department of Geriatric Endocrinology, Chinese PLA General Hospital, Beijing, 100853, China
| | - X Zheng
- Department of Endocrinology, China Rehabilitation Research Center, Beijing, 100068, China
| | - Q Wang
- Department of Endocrinology, Beijing Liangxiang Hospital, Beijing, 102401, China
| | - Z Ning
- Department of Endocrinology, Beijing Chaoyang Hospital, Beijing, 100020, China
| | - M Li
- Department of Endocrinology, Key Laboratory of Endocrinology, Ministry of Health, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, 100730, China
| | - O Wang
- Department of Endocrinology, Key Laboratory of Endocrinology, Ministry of Health, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, 100730, China
| | - X Xing
- Department of Endocrinology, Key Laboratory of Endocrinology, Ministry of Health, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, 100730, China
| | - Q Lin
- Department of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, 100730, China
| | - W Yu
- Department of Radiology, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, 100730, China
| | - X Weng
- Department of Orthopedics, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, 100730, China
| | - L Xu
- Department of Gynaecology and Obstetrics, Peking Union Medical College Hospital, Chinese Academy of Medical Science, Beijing, 100730, China
| | - S R Cummings
- San Francisco Coordinating Center, CPMC Research Institute and Department of Epidemiology and Biostatistics, University of California, San Francisco, USA
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Weng X, Yan YY, Tong YH, Fan Y, Zeng JM, Wang LL, Lin NM. [Overexpression of Keap1 inhibits the cell proliferation and metastasis and overcomes the drug resistance in human lung cancer A549 cells]. Zhonghua Zhong Liu Za Zhi 2016; 38:404-10. [PMID: 27346396 DOI: 10.3760/cma.j.issn.0253-3766.2016.06.002] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
OBJECTIVE To investigate the effect of Keap1-Nrf2 pathway on cell proliferation, metastasis and drug resistance of human lung cancer A549 cell line. METHODS A549-Keap1 cell line, constantly expressing wild type Keap1, was established by lentiviral transfection. Real-time RT-PCR and western blot were used to determine the expression of Nrf2 and its target gene in A549 cells. Sulforhodamine B (SRB) assay, flow cytometry, colony formation assay, transwell assay, and cell wound-healing assay were performed to explore the effect of wild type Keap1 expression on the proliferation, invasion, migration and drug resistance of A549 cells. RESULTS Over-expressed Keap1 decreased the expression of Nrf2 protein and the mRNA level of its downstream target genes and inhibited the ability of cell proliferation and clone formation of A549 cells. Keap1 overexpression induced G0/G1 phase arrest. The percentage of A549-Keap1 cells in G0/G1 phase was significantly higher than that of A549-GFP cells (80.2±5.9)% vs. (67.1±0.9%)(P<0.05). Compared with the invasive A549-Keap1 cells (156.33±17.37), the number of invasive A549-GFP cells was significantly higher (306.67±22.19) in a high power field. Keap1 overexpression significantly enhanced the sensitivity of A549 cells to carboplatin and gemcitabine (P<0.01). The IC50s of carboplatin in A549-Keap1 and A549-GFP cells were (52.1±3.3) μmol/L and (107.8±12.9) μmol/L, respectively. The IC50s of gemcitabine in A549-Keap1 and A549-GFP cells were (6.8±1.2) μmol/L and (9.9±0.5) μmol/L, respectively. CONCLUSION Keap1 overexpression significantly inhibits the expression of Nrf2 and its downstream target genes, suppresses tumor cell proliferation and metastasis, and enhances the sensitivity of A549 cells to anticancer drugs.
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Affiliation(s)
- X Weng
- Institute of Cancer Pharmacology, the First Affiliated Hospital, Zhejiang Chinese Medical University, Hangzhou 310006, China
| | - Y Y Yan
- Translational Medicine Research Center, the First People's Hospital, Hangzhou 310006, China
| | - Y H Tong
- Department of Clinical Pharmacy, Zhejiang Cancer Hospital, Hangzhou 310022, China
| | - Y Fan
- Department of Clinical Pharmacy, Zhejiang Cancer Hospital, Hangzhou 310022, China
| | - J M Zeng
- Institute of Cancer Pharmacology, the First Affiliated Hospital, Zhejiang Chinese Medical University, Hangzhou 310006, China
| | - L L Wang
- Institute of Cancer Pharmacology, the First Affiliated Hospital, Zhejiang Chinese Medical University, Hangzhou 310006, China
| | - N M Lin
- Translational Medicine Research Center, the First People's Hospital, Hangzhou 310006, China
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Dayton A, Monteiro APA, Weng X, Tao S, Miller-Cushon EK. 0077 Effects of acute and chronic heat stress on feed sorting behavior of lactating dairy cows. J Anim Sci 2016. [DOI: 10.2527/jam2016-0077] [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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Weng X, Monteiro APA, Guo J, Ahmed BMS, Bernard JK, DeFrain J, Dahl GE, Tao S. 0842 Repeated mammary tissue collections during lactation have no impact on cow performance. J Anim Sci 2016. [DOI: 10.2527/jam2016-0842] [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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Weng X, Monteiro APA, Guo J, Bernard JK, DeFrain J, Tao S. 0719 Effects of heat stress and dietary zinc source on mammary tight junction of lactating dairy cows. J Anim Sci 2016. [DOI: 10.2527/jam2016-0719] [Citation(s) in RCA: 2] [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: 11/13/2022] Open
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Monteiro APA, Weng X, Guo J, Bernard JK, DeFrain J, Tao S. 1177 Effects of cooling and dietary zinc source on the inflammatory responses to an intra-mammary lipopolysaccharide challenge in lactating Holstein cows during summer. J Anim Sci 2016. [DOI: 10.2527/jam2016-1177] [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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Kook S, Wang P, Young LR, Schwake M, Saftig P, Weng X, Meng Y, Neculai D, Marks MS, Gonzales L, Beers MF, Guttentag S. Impaired Lysosomal Integral Membrane Protein 2-dependent Peroxiredoxin 6 Delivery to Lamellar Bodies Accounts for Altered Alveolar Phospholipid Content in Adaptor Protein-3-deficient pearl Mice. J Biol Chem 2016; 291:8414-27. [PMID: 26907692 PMCID: PMC4861416 DOI: 10.1074/jbc.m116.720201] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Indexed: 11/06/2022] Open
Abstract
The Hermansky Pudlak syndromes (HPS) constitute a family of disorders characterized by oculocutaneous albinism and bleeding diathesis, often associated with lethal lung fibrosis. HPS results from mutations in genes of membrane trafficking complexes that facilitate delivery of cargo to lysosome-related organelles. Among the affected lysosome-related organelles are lamellar bodies (LB) within alveolar type 2 cells (AT2) in which surfactant components are assembled, modified, and stored. AT2 from HPS patients and mouse models of HPS exhibit enlarged LB with increased phospholipid content, but the mechanism underlying these defects is unknown. We now show that AT2 in the pearl mouse model of HPS type 2 lacking the adaptor protein 3 complex (AP-3) fails to accumulate the soluble enzyme peroxiredoxin 6 (PRDX6) in LB. This defect reflects impaired AP-3-dependent trafficking of PRDX6 to LB, because pearl mouse AT2 cells harbor a normal total PRDX6 content. AP-3-dependent targeting of PRDX6 to LB requires the transmembrane protein LIMP-2/SCARB2, a known AP-3-dependent cargo protein that functions as a carrier for lysosomal proteins in other cell types. Depletion of LB PRDX6 in AP-3- or LIMP-2/SCARB2-deficient mice correlates with phospholipid accumulation in lamellar bodies and with defective intraluminal degradation of LB disaturated phosphatidylcholine. Furthermore, AP-3-dependent LB targeting is facilitated by protein/protein interaction between LIMP-2/SCARB2 and PRDX6 in vitro and in vivo Our data provide the first evidence for an AP-3-dependent cargo protein required for the maturation of LB in AT2 and suggest that the loss of PRDX6 activity contributes to the pathogenic changes in LB phospholipid homeostasis found HPS2 patients.
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Affiliation(s)
| | - Ping Wang
- From the Division of Neonatology and
| | - Lisa R Young
- Division of Pediatric Pulmonary Medicine, Department of Pediatrics, Vanderbilt University School of Medicine, Nashville, Tennessee 37232
| | - Michael Schwake
- the Department of Chemistry, Biochemistry III, University of Bielefeld, D-33615 Bielefeld, Germany
| | - Paul Saftig
- the Institute of Biochemistry, Christian-Albrechts-University, Olshausenstrasse 40, D-24098 Kiel, Germany
| | - Xialian Weng
- the Zhejiang University, Yuhangtang Road 866, Hangzhou 310058, China
| | - Ying Meng
- the Zhejiang University, Yuhangtang Road 866, Hangzhou 310058, China
| | - Dante Neculai
- the Zhejiang University, Yuhangtang Road 866, Hangzhou 310058, China
| | - Michael S Marks
- the Department of Pathology and Laboratory Medicine, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania 19104, and the Departments of Pathology and Laboratory Medicine and of Physiology, and
| | - Linda Gonzales
- Division of Adult Pulmonary and Critical Care Medicine, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104
| | - Michael F Beers
- Division of Adult Pulmonary and Critical Care Medicine, Department of Medicine, Perelman School of Medicine, University of Pennsylvania, Philadelphia, Pennsylvania 19104
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Li H, Li T, Fan J, Li T, Fan L, Wang S, Weng X, Han Q, Zhao RC. miR-216a rescues dexamethasone suppression of osteogenesis, promotes osteoblast differentiation and enhances bone formation, by regulating c-Cbl-mediated PI3K/AKT pathway. Cell Death Differ 2015. [PMID: 26206089 DOI: 10.1038/cdd.2015.99] [Citation(s) in RCA: 106] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Osteoporosis is a disease marked by reduced bone mass, leading to an increased risk of fractures or broken bones. Bone formation is mediated by recruiting mesenchymal stem cells (MSCs). Elucidation of the molecular mechanisms that regulate MSC differentiation into osteoblasts is of great importance for the development of anabolic therapies for osteoporosis and other bone metabolism-related diseases. microRNAs (miRNAs) have been reported to have crucial roles in bone development, osteogenic differentiation and osteoporosis pathophysiology. However, to date, only a few miRNAs have been reported to enhance osteogenesis and regulate the suppressive effect of glucocorticoids on osteogenic differentiation. In this study, we discovered that miR-216a, a pancreatic-specific miRNA, was significantly upregulated during osteogenic differentiation in human adipose-derived MSCs (hAMSCs). The expression of miR-216a was positively correlated with the expression of bone formation marker genes in clinical osteoporosis samples. Functional analysis demonstrated that miR-216a can markedly promote osteogenic differentiation of hAMSCs, rescue the suppressive effect of dexamethasone (DEX) on osteogenic differentiation in vitro and enhance bone formation in vivo. c-Cbl, a gene that encodes a RING finger E3 ubiquitin ligase, was identified as a direct target of miR-216a. Downregulation of c-Cbl by short hairpin RNAs can mimic the promotion effects of miR-216a and significantly rescue the suppressive effects of DEX on osteogenesis. Pathway analysis indicated that miR-216a regulation of osteogenic differentiation occurs via the c-Cbl-mediated phosphatidylinositol 3 kinase (PI3K)/AKT pathway. The recovery effects of miR-216a on the inhibition of osteogenesis by DEX were attenuated after blocking the PI3K pathway. Thus, our findings suggest that miR-216a may serve as a novel therapeutic agent for the prevention and treatment of osteoporosis and other bone metabolism-related diseases.
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Affiliation(s)
- H Li
- Department of Cell Biology, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Peking Union Medical College Hospital, Center of Excellence in Tissue Engineering Chinese Academy of Medical Sciences, Beijing, China
| | - T Li
- Department of Cell Biology, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Peking Union Medical College Hospital, Center of Excellence in Tissue Engineering Chinese Academy of Medical Sciences, Beijing, China
| | - J Fan
- Department of Cell Biology, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Peking Union Medical College Hospital, Center of Excellence in Tissue Engineering Chinese Academy of Medical Sciences, Beijing, China
| | - T Li
- Department of Orthopaedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Science, Beijing, 100730, China
| | - L Fan
- Department of Cell Biology, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Peking Union Medical College Hospital, Center of Excellence in Tissue Engineering Chinese Academy of Medical Sciences, Beijing, China
| | - S Wang
- Department of Cell Biology, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Peking Union Medical College Hospital, Center of Excellence in Tissue Engineering Chinese Academy of Medical Sciences, Beijing, China
| | - X Weng
- Department of Orthopaedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Science, Beijing, 100730, China
| | - Q Han
- Department of Cell Biology, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Peking Union Medical College Hospital, Center of Excellence in Tissue Engineering Chinese Academy of Medical Sciences, Beijing, China
| | - R C Zhao
- Department of Cell Biology, Institute of Basic Medical Sciences Chinese Academy of Medical Sciences, School of Basic Medicine Peking Union Medical College, Peking Union Medical College Hospital, Center of Excellence in Tissue Engineering Chinese Academy of Medical Sciences, Beijing, China
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Djouhri L, Al Otaibi M, Kahlat K, Smith T, Sathish J, Weng X. Persistent hindlimb inflammation induces changes in activation properties of hyperpolarization-activated current (Ih) in rat C-fiber nociceptors in vivo. Neuroscience 2015; 301:121-33. [PMID: 26047727 DOI: 10.1016/j.neuroscience.2015.05.074] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2015] [Revised: 05/24/2015] [Accepted: 05/28/2015] [Indexed: 12/31/2022]
Abstract
A hallmark of chronic inflammation is hypersensitivity to noxious and innocuous stimuli. This inflammatory pain hypersensitivity results partly from hyperexcitability of nociceptive dorsal root ganglion (DRG) neurons innervating inflamed tissue, although the underlying ionic mechanisms are not fully understood. However, we have previously shown that the nociceptor hyperexcitability is associated with increased expression of hyperpolarization-activated cyclic nucleotide-gated channel 2 (HCN2) protein and hyperpolarization-activated current (Ih) in C-nociceptors. Here we used in vivo voltage-clamp and current-clamp recordings, in deeply anesthetized rats, to determine whether activation properties of Ih in these C-nociceptors also change following persistent (not acute) hindlimb inflammation induced by complete Freund's adjuvant (CFA). Recordings were made from lumbar (L4/L5) C-nociceptive DRG neurons. Behavioral sensory testing was performed 5-7days after CFA treatment, and all the CFA-treated group showed significant behavioral signs of mechanical and heat hypersensitivity, but not spontaneous pain. Compared with control, C-nociceptors recorded 5-7days after CFA showed: (a) a significant increase in the incidence of spontaneous activity (from ∼5% to 26%) albeit at low rate (0.14±0.08Hz (Mean±SEM); range, 0.01-0.29Hz), (b) a significant increase in the percentage of neurons expressing Ih (from 35%, n=43-84%, n=50) based on the presence of voltage "sag" of >10%, and (c) a significant increase in the conductance (Gh) of the somatic channels conducting Ih along with the corresponding Ih,Ih, activation rate, but not voltage dependence, in C-nociceptors. Given that activation of Ih depolarizes the neuronal membrane toward the threshold of action potential generation, these changes in Ih kinetics in CFA C-nociceptors may contribute to their hyperexcitability and thus to pain hypersensitivity associated with persistent inflammation.
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Affiliation(s)
- L Djouhri
- Department of Physiology, College of Medicine, King Saud University, P.O. Box 7805, Riyadh 11472, Saudi Arabia
| | - M Al Otaibi
- Department of Physiology, College of Medicine, King Saud University, P.O. Box 7805, Riyadh 11472, Saudi Arabia
| | - K Kahlat
- Department of Physiology, College of Medicine, King Saud University, P.O. Box 7805, Riyadh 11472, Saudi Arabia
| | - T Smith
- Wolfson CARD, Neurorestoration Group, Hodgkin Building, King's College London, Guy's Campus, London Bridge, London SE1 1UL, UK
| | - J Sathish
- Department of Molecular and Clinical Pharmacology;Sherrington Buildings, University of Liverpool, L69 3GE, UK
| | - X Weng
- Department of Neurobiology and State Key Laboratory of Proteomics, Beijing Institute of B Basic Medical Sciences, Beijing 100850, China.
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Wu N, Ming X, Xiao J, Wu Z, Chen X, Shinawi M, Shen Y, Yu G, Liu J, Xie H, Gucev ZS, Liu S, Yang N, Al-Kateb H, Chen J, Zhang J, Hauser N, Zhang T, Tasic V, Liu P, Su X, Pan X, Liu C, Wang L, Shen J, Shen J, Chen Y, Zhang T, Zhang J, Choy KW, Wang J, Wang Q, Li S, Zhou W, Guo J, Wang Y, Zhang C, Zhao H, An Y, Zhao Y, Wang J, Liu Z, Zuo Y, Tian Y, Weng X, Sutton VR, Wang H, Ming Y, Kulkarni S, Zhong TP, Giampietro PF, Dunwoodie SL, Cheung SW, Zhang X, Jin L, Lupski JR, Qiu G, Zhang F. TBX6 null variants and a common hypomorphic allele in congenital scoliosis. N Engl J Med 2015; 372:341-50. [PMID: 25564734 PMCID: PMC4326244 DOI: 10.1056/nejmoa1406829] [Citation(s) in RCA: 203] [Impact Index Per Article: 22.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
BACKGROUND Congenital scoliosis is a common type of vertebral malformation. Genetic susceptibility has been implicated in congenital scoliosis. METHODS We evaluated 161 Han Chinese persons with sporadic congenital scoliosis, 166 Han Chinese controls, and 2 pedigrees, family members of which had a 16p11.2 deletion, using comparative genomic hybridization, quantitative polymerase-chain-reaction analysis, and DNA sequencing. We carried out tests of replication using an additional series of 76 Han Chinese persons with congenital scoliosis and a multicenter series of 42 persons with 16p11.2 deletions. RESULTS We identified a total of 17 heterozygous TBX6 null mutations in the 161 persons with sporadic congenital scoliosis (11%); we did not observe any null mutations in TBX6 in 166 controls (P<3.8×10(-6)). These null alleles include copy-number variants (12 instances of a 16p11.2 deletion affecting TBX6) and single-nucleotide variants (1 nonsense and 4 frame-shift mutations). However, the discordant intrafamilial phenotypes of 16p11.2 deletion carriers suggest that heterozygous TBX6 null mutation is insufficient to cause congenital scoliosis. We went on to identify a common TBX6 haplotype as the second risk allele in all 17 carriers of TBX6 null mutations (P<1.1×10(-6)). Replication studies involving additional persons with congenital scoliosis who carried a deletion affecting TBX6 confirmed this compound inheritance model. In vitro functional assays suggested that the risk haplotype is a hypomorphic allele. Hemivertebrae are characteristic of TBX6-associated congenital scoliosis. CONCLUSIONS Compound inheritance of a rare null mutation and a hypomorphic allele of TBX6 accounted for up to 11% of congenital scoliosis cases in the series that we analyzed. (Funded by the National Basic Research Program of China and others.).
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Affiliation(s)
- N Wu
- The authors' affiliations are listed in the Appendix
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Zhang J, Wang S, Weng X, Li Q. Posterior vertebral column resection in a 10-year-old boy with haemophilia B and congenital kyphosis--a case report and literature review. Haemophilia 2014; 20:e364-7. [PMID: 25102760 DOI: 10.1111/hae.12490] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/28/2014] [Indexed: 11/29/2022]
Affiliation(s)
- J Zhang
- Department of Orthopedics, Peking Union Medical College Hospital, Beijing, China
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Chen G, Zhao Y, Fu G, Duchesne PN, Gu L, Zheng Y, Weng X, Chen M, Zhang P, Pao CW, Lee JF, Zheng N. Interfacial Effects in Iron-Nickel Hydroxide-Platinum Nanoparticles Enhance Catalytic Oxidation. Science 2014; 344:495-9. [DOI: 10.1126/science.1252553] [Citation(s) in RCA: 502] [Impact Index Per Article: 50.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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Soulieres D, Allo G, Audet ML, Kim L, Weng X, Gologan O, Quinn S, Taylor I, English P, Siu L. Potential Predictive Markers of Efficacy of Dacomitinib in Patients with Recurrent/Metastatic Scchn from a Phase 2 Trial. Ann Oncol 2013. [DOI: 10.1093/annonc/mdt460.85] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Shao H, Cheng Q, He S, Weng X. Differential Selectivity and Representational Content of the Fine Scale Face-Responsive Regions. J Vis 2013. [DOI: 10.1167/13.9.173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Chen N, Shao H, Weng X, Fang F. Motion perceptual learning in noise improves neural sensitivity in human MT+ and IPS. J Vis 2013. [DOI: 10.1167/13.9.908] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Du X, Wang J, Shao L, Hu X, Yang C, Shen L, Weng X, Zhang W. Histological improvement of long-term antiviral therapy in chronic hepatitis B patients with persistently normal alanine aminotransferase levels. J Viral Hepat 2013; 20:328-35. [PMID: 23565615 DOI: 10.1111/jvh.12034] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2012] [Accepted: 09/01/2012] [Indexed: 12/11/2022]
Abstract
The aim of this study was to evaluate the histological outcomes of chronic hepatitis B (CHB) patients with persistently normal alanine aminotransferase (ALT) levels after long-term antiviral therapy. Paired liver biopsies before and after lamivudine (LAM) treatment in CHB patients with normal and elevated ALT levels were compared. Histological response was defined as a 1-point decrease according to the Scheuer scoring system, without worsening of fibrosis between pretreatment and posttreatment biopsies. Among the 48 patients who underwent paired liver biopsies, 17 had persistently normal baseline ALT level and 31 had elevated ALT level. The median age of the patients was 44 years and 72.9% of the patients were male. The median duration of antiviral treatment was 44.5 months (range 14-104). Long-term follow-up of liver biopsies revealed that 82.4% of patients in the normal ALT group and 61.3% in the elevated ALT group had a baseline fibrosis score of 4, which was reduced to 17.6% and 38.7% after long-term therapy, respectively, indicating reversal of cirrhosis in a large proportion of both groups, especially in patients with normal baseline ALT levels. Long-term antiviral treatment could achieve significant histological improvement in CHB patients with fibrosis or cirrhosis, regardless of ALT level.
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Affiliation(s)
- X Du
- Department of Infectious Diseases, Beilun People's Hospital, Ningbo, China
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Bie L, Zhao G, McClland M, Ju Y, Li PY, Zhou DJ, Jin Z, Bie L, Jenkins RB, Xiao Y, Sicotte H, Decker PA, Kollmeyer TM, Hansen HM, Kosel ML, Zheng S, Walsh KM, Rice T, Bracci P, Smirnov I, Patoka JF, Hsuang G, Wiemels JL, Tehan T, Pico AR, Prados MD, Berger MS, Caron AA, Fink SR, Halder C, Rynearson AL, Fridley BL, O'Neill BP, Giannini C, Lachance DH, Wienke JK, Eckel-Passow JE, Wrensch MR, Aref D, Perry A, Taylor M, Eberhardt C, Olson J, Moffatt C, Croul S, Maurice C, Belanger K, Berthelet F, Weng X, Amirian ES, Liu Y, Okada H, Sarkar SN, Bondy ML, Scheurer ME, Verhaak R, Liu Y, Amirian ES, Okada H, Sarkar S, Scheurer M, Bondy M, Liu Y, Melin B, Wang Z, Rajaraman P, Chanock S, Bondy M, Consortium G, Smith A, Accomando WP, Houseman EA, Marsit CJ, Weincke JK, Kelsey KT. LAB-MOLECULAR EPIDEMIOLOGY. Neuro Oncol 2012. [DOI: 10.1093/neuonc/nos225] [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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Jin J, Zhang Y, Fan X, Diao N, Shao L, Wang F, Hu P, Wang S, Weng X, Zhang W. Evaluation of the GenoType® MTBDRplus assay and identification of a rare mutation for improving MDR-TB detection. Int J Tuberc Lung Dis 2012; 16:521-6. [PMID: 22325117 DOI: 10.5588/ijtld.11.0269] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVE To assess the new GenoType® MTBDRplus assay for the rapid detection of multidrug-resistant tuberculosis (MDR-TB) in comparison with DNA sequencing to identify drug resistance mutation profiles in China. DESIGN Using MTBDRplus, drug susceptibility testing (DST) and DNA sequencing, 237 Mycobacterium tuberculosis strains were tested. RESULTS The sensitivity of MTBDRplus was 75.0% (126/168) for isoniazid (INH) resistant strains, and 93.5% (157/168) for rifampicin (RMP) resistant strains. It correlated well with sequencing, with 94.9% and 99.6% agreement for each strain category and 100% specificity for all categories. The two most common rpoB mutations were S531L (53.6%, 90/168) and D516G (17.3%, 29/168) in RMP-resistant strains. INH resistance was dominated by the katG 315 locus (S to T, N, R, I) mutation (73.7%, 124/168), and a rare katG mutation, S315N (6.5%, 11/168), not covered by MTBDRplus was identified. The mutation combination inhA-15/inhA-8 and katG315 (34 strains) was characteristically displayed in MDR-TB strains (23.5%), but not in INH-monoresistant strains. CONCLUSIONS Although Genotype MTBDRplus is a rapid and reliable molecular test for detecting MDR-TB, a significant proportion of strains in China contain a rare katG S315N mutation that would be missed by the assay. Further improvements may be achieved by incorporating this mutation into the assay to increase sensitivity in detecting INH resistance in China.
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Affiliation(s)
- J Jin
- Department of Infectious Diseases, Huashan Hospital, Fudan University, Shanghai, China
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Kamel-Reid S, Chong G, Ionescu DN, Magliocco AM, Spatz A, Tsao M, Weng X, Young S, Zhang T, Soulieres D. EGFR tyrosine kinase mutation testing in the treatment of non-small-cell lung cancer. ACTA ACUST UNITED AC 2012; 19:e67-74. [PMID: 22514499 DOI: 10.3747/co.19.862] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
BACKGROUND Non-small-cell lung cancer (nsclc) tumours with activating mutations of the epidermal growth factor receptor (efgr) tyrosine kinase are highly sensitized to the effects of oral tyrosine kinase inhibitors such as gefitinib and erlotinib, suggesting the possibility of targeted treatment of nsclc based on EFGR mutation status. However, no standardized method exists for assessing the EGFR mutation status of tumours. Also, it is not known if available methods are feasible for routine screening. To address that question, we conducted a validation study of methods used for detecting EGFR mutations in exons 19 and 21 at molecular laboratories located in five specialized Canadian cancer centres. METHODS The screening methods were first optimized using cell lines harbouring the mutations in question. A validation phase using anonymized patient samples followed. RESULTS The methods used at the sites were highly specific and sensitive in detecting both mutations in cell-line dna (specificity of 100% and sensitivity of at least 1% across all centres). In the validation phase, we observed excellent concordance between the laboratories for detecting mutations in the patient samples. Concordant results were obtained in 26 of 30 samples (approximately 87%). In general, the samples for which results were discordant were also less optimal, containing small amounts of tumour. CONCLUSIONS Our results suggest that currently available methods are capable of reliably detecting exon 19 and exon 21 mutations of EFGR in tumour samples (provided that sufficient tumour material is available) and that routine screening for those mutations is feasible in clinical practice.
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Affiliation(s)
- S Kamel-Reid
- Department of Pathology, The University Health Network, Toronto, ON
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Jiang B, Chen Q, Liu X, Kong D, Kuang Y, Weng X, Chen H. Ischemic Postconditioning Protects Renal Function After 24 Hours of Cold Preservation in a Canine Autotransplantation Model. Transplant Proc 2012; 44:1776-81. [DOI: 10.1016/j.transproceed.2012.05.040] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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Bai J, Wang L, Weng X, He S. The efficiency of searching for Chinese character in Pseudo characters, false characters and stroke combinations. J Vis 2011. [DOI: 10.1167/11.11.1307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Thibaudeau E, Soulieres D, Fortin B, Coutlee F, Nguyen-Tan P, Weng X, Audette M, Abboud O, Guertin L, Christopoulos A, Tabet J. HPV prevalence and prognostic value in a prospective cohort of 255 patients with locally advanced squamous cell carcinoma of the head and neck treated with chemoradiation therapy at Centre Hospitalier de l'Université de Montréal: A single-center experience. J Clin Oncol 2011. [DOI: 10.1200/jco.2011.29.15_suppl.5574] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Gong W, Xiao W, Hu M, Weng X, Qian L, Pan X, Ji M. Ex vivo expansion of natural killer cells with high cytotoxicity by K562 cells modified to co-express major histocompatibility complex class I chain-related protein A, 4-1BB ligand, and interleukin-15. ACTA ACUST UNITED AC 2011; 76:467-75. [PMID: 20670353 DOI: 10.1111/j.1399-0039.2010.01535.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
A large number of natural killer (NK) cells with high function are expected to generate especially in tumor adoptive immunotherapy. Here K562 cells were genetically modified to co-express major histocompatibility complex class I chain-related protein A (MICA), 4-1BB ligand, and IL-15, called K562-MICA-4-1BBL-IL-15. The modified K562 cells not only promoted activation, proliferation, and survival of NK cells, but also enhanced NK cell cytotoxicity. In long-term culture tests, K562-MICA-4-1BBL-IL-15 cells stimulated NK cell to expand mean 550 folds in 24-day culture and to cover from 14.8% of total peripheral blood monoclonal lymphocytes on day 1 to 86.7% on day 24. Prevalent NK cells after expansion enhanced the ability of killing targets and producing interferon gamma (IFN-γ), and kept high expression of activating receptors. The results indicated that K562-MICA-4-1BBL-IL-15 cells would be developed for expansion of NK cells ex vivo and may have important implications for clinical immunotherapy.
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Affiliation(s)
- W Gong
- Department of Immunology, School of Medicine, The Second Clinical Medical College, Yangzhou University, Yangzhou, PR China.
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He S, Liu H, Jiang Y, Chen C, Gong Q, Weng X. Transforming a left lateral fusiform region into VWFA through training in illiterate adults. J Vis 2010. [DOI: 10.1167/9.8.853] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Yan Y, Dou Y, Weng X, Cox C. SU-GG-T-258: Solutions to Transforming a Radiotherapy Clinic with Multigenerational Equipment into a Paperless and Filmless Facility. Med Phys 2010. [DOI: 10.1118/1.3468649] [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: 11/07/2022] Open
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