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Zhang H, Zhang SY, Jiang C, Li Y, Xu G, Xu MJ, Wang X. Intermedin/adrenomedullin 2 polypeptide promotes adipose tissue browning and reduces high-fat diet-induced obesity and insulin resistance in mice. Int J Obes (Lond) 2016; 40:852-60. [PMID: 26786353 DOI: 10.1038/ijo.2016.2] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [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: 06/04/2015] [Revised: 11/06/2015] [Accepted: 12/06/2015] [Indexed: 12/31/2022]
Abstract
OBJECTIVES There is an urgent need to develop interventions and policies to mitigate the health effects of obesity by targeting its metabolic mediators. Adrenomedullin 2 (AM2)/intermedin (IMD) is a secreted peptide that has an important role in protecting the cardiovascular system. However, the role of AM2 in type 2 diabetes is unknown. METHODS Wild-type (WT) and aP2/AM2 transgenic (aAM2-tg) mice were fed a high-fat diet (HFD) for 8 weeks, and WT mice were treated with AM2 through mini-osmotic pumps. Indirect calorimetry, ambulatory activity and food intake, hyperinsulinemic-euglycemic clamp test, glucose and insulin tolerance tests were used for assessing insulin resistance. Rat primary adipocytes and pre-adipocyte-derived adipocytes were used for in vitro experiments. Real-time PCR and western blot were used for analyses of gene expression and protein level. RESULTS AM2 and receptor activity-modifying proteins expressions were significantly decreased in the adipose tissue of obese mice. AM2 treatment significantly reduced blood glucose, fasting serum insulin and free fatty acid levels, improved glucose tolerance and insulin sensitivity, and increased the glucose infusion rate during a hyperinsulinemic-euglycemic clamp test, indicating ameliorated HFD-induced insulin resistance. These effects were consistently observed in aAM2-tg mice under HFD conditions, whereas the aAM2-tg mice showed less weight gain and improved glucose tolerance and insulin sensitivity. More importantly, the aAM2-tg mice had increased oxygen consumption and CO2 production, reflecting more energy expenditure. These effects may be due to increased AMP-activated protein kinase phosphorylation and reduced peroxisome proliferator-activated receptor gamma co-activator 1α (PGC1α) acetylation, which result in interactions between PGC1α and PR domain containing 16 and then promote uncoupling protein 1 (UCP1) expression in adipocytes. CONCLUSIONS These results indicate that endogenous AM2 might be involved in energy metabolism in adipocytes through the upregulation of UCP1 expression.
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Affiliation(s)
- H Zhang
- Department of Physiology and Pathophysiology, School of Basic Medical Science, Peking University Health Science Center, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing, China
| | - S-Y Zhang
- Department of Physiology and Pathophysiology, School of Basic Medical Science, Peking University Health Science Center, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing, China
| | - C Jiang
- Department of Physiology and Pathophysiology, School of Basic Medical Science, Peking University Health Science Center, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing, China
| | - Y Li
- Department of Physiology and Pathophysiology, School of Basic Medical Science, Peking University Health Science Center, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing, China
| | - G Xu
- Department of Physiology and Pathophysiology, School of Basic Medical Science, Peking University Health Science Center, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing, China
| | - M-J Xu
- Department of Physiology and Pathophysiology, School of Basic Medical Science, Peking University Health Science Center, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing, China
| | - X Wang
- Department of Physiology and Pathophysiology, School of Basic Medical Science, Peking University Health Science Center, Key Laboratory of Molecular Cardiovascular Science, Ministry of Education, Beijing, China
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Guan WJ, Gao YH, Xu G, Lin ZY, Tang Y, Li HM, Lin ZM, Zheng JP, Chen RC, Zhong NS. Sputum bacteriology in steady-state bronchiectasis in Guangzhou, China. Int J Tuberc Lung Dis 2016; 19:610-9. [PMID: 25868032 DOI: 10.5588/ijtld.14.0613] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The impact of potentially pathogenic micro-organisms (PPMs) on Chinese patients with steady-state bronchiectasis is unknown. METHODS Peripheral blood and sputum were sampled to determine inflammatory markers and sputum bacterial density. Spirometry and diffusing capacity were measured. Quality of life was assessed using the St George's Respiratory Questionnaire. RESULTS Of 144 patients with steady-state bronchiectasis, Pseudomonas aeruginosa was isolated in 44 cases (30.6%). Compared with other PPMs, P. aeruginosa had a more pronounced influence on airway inflammation and spirometry, but not on systemic inflammation or quality of life. The impact of PPMs other than P. aeruginosa on clinical indices was similar. Bacterial density was not correlated with most clinical parameters. Factors associated with PPM isolation included bronchiectasis symptoms for ⩾ 10 years (OR 2.13) and ⩾ 4 bronchiectatic lobes (OR 2.82). Having ⩾ 4 exacerbations within 2 years (OR 2.18) and cystic bronchiectasis (OR 2.23) was associated with the colonisation of PPMs, i.e., isolating an identical PPM on at least two occasions within 1 year. CONCLUSION In patients with steady-state bronchiectasis in Guangzhou, P. aeruginosa is the most common organism causing heightened airway inflammation and poor lung function. PPM isolation or colonisation should be suspected in case of longer duration of symptoms, multilobar bronchiectasis, frequent exacerbation and cystic bronchiectasis.
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Affiliation(s)
- W-J Guan
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Disease, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Y-H Gao
- Department of Respiratory and Critical Care Medicine, First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, China
| | - G Xu
- Guangzhou First People's Hospital, Guangzhou, Guangdong, China
| | - Z-Y Lin
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Disease, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Y Tang
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Disease, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - H-M Li
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Disease, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Z-M Lin
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Disease, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - J-P Zheng
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Disease, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - R-C Chen
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Disease, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - N-S Zhong
- State Key Laboratory of Respiratory Disease, National Clinical Research Center for Respiratory Disease, Guangzhou Institute of Respiratory Disease, First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
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An L, Han X, Li H, Ma Y, Shi L, Xu G, Yuan G, Sun J, Zhao N, Sheng Y, Wang M, Du P. Effects and mechanism of cerebroprotein hydrolysate on learning and memory ability in mice. Genet Mol Res 2016; 15:gmr8804. [DOI: 10.4238/gmr.15038804] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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154
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Xu G, Niu Z, Dong J, Zhao Y, Zhang Y, Li X. Noscapine inhibits human hepatocellular carcinoma growth through inducing apoptosis in vitro and in vivo. Neoplasma 2016; 63:726-33. [DOI: 10.4149/neo_2016_509] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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155
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Liu Y, Huang J, Xu G, He S, Zhang J, Wang X, Cai H, Shen Y. Prevalence and Determinants of Metabolic Syndrome-identified by Three Criteria among Men in Rural China: A Population-based Cross-sectional Study Conducted during 2007-2008. J Nutr Health Aging 2016; 20:574-82. [PMID: 27102798 DOI: 10.1007/s12603-015-0615-8] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
OBJECTIVE The aim of this study was to estimate MS prevalence according to three criteria and its risk factors among men in rural China. DESIGN Cross-sectional study. SETTING The Nantong Metabolic Syndrome Study (NMSS) was conducted during 2007-2008 in Nantong, China. PARTICIPANTS 6997 male participants aged 18-74 years. MEASUREMENTS In person interviews, blood glucose and lipid measurements were accomplished. RESULTS The prevalence of MS was 12.86%, 8.55% and 15.28% according to IDF, ATPIII and ATPIII-modified criteria, respectively. The IDF and ATP III-modified criteria agreed only moderately with ATP III criteria (κ= 0.56 and 0.68), whereas ATP III-modified and the IDF criteria agreed perfectly (κ= 0.90). Vigorous occupational physical activity was associated with a low prevalence of MS with Odds ratio (OR) of 0.58 (95% confidence interval (CI): 0.45-0.74). Beer drinkers (alcohol ≤ 6.2 g/day) and rice wine drinkers (alcohol ≤ 9.0 g/day) had about 34% and 33% low risks of developing MS respectively, compared with non-drinkers. OR of MS was 1.95 (95% CI: 1.39-2.73) in men who had familial history of at least two diseases, including hypertension and diabetes, compared with men without familial history of those diseases. CONCLUSIONS Our data suggested that MS is highly prevalent among men in rural China. Family history of diabetes and hypertension is a risk factor in MS development. Physical activity, rice wine and beer consumption are associated with a significantly lower risk.
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Affiliation(s)
- Y Liu
- Yi Shen, Department of Epidemiology and Medical Statistics, Nantong University, Nantong, Jiangsu, China 226019 E-mail: ; Hui Cai, Department of Medicine, Vanderbilt Epidemiology Center and Vanderbilt-Ingram Cancer Center, Vanderbilt University, Nashville, USA E-mail:
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Yang X, Li D, Ren ZH, Zeng RG, Gong SY, Zhou DK, Tian H, Li JX, Xu G, Shen ZJ, Han GR. Colossal dielectric performance of pure barium titanate ceramics consolidated by spark plasma sintering. RSC Adv 2016. [DOI: 10.1039/c6ra14741k] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023] Open
Abstract
The pure BaTiO3 nanoceramics have a high permittivity up to 6 × 104 and a low dielectric loss. The polaron dipoles configured by oxygen vacancies and Ti3+ cations within grains could contribute to the colossal dielectric permittivity of the ceramics.
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157
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Wang JH, Wang CC, Wang SX, Wu MH, Xu G, Zheng WF, He H, Zhang SD. γ-ray damage of N,N-diethyl-hydroxylamine in water and its radiolytic products at lower dose. J Radioanal Nucl Chem 2015. [DOI: 10.1007/s10967-015-4641-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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158
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Tian Y, Shen L, Wu J, Xu G, Yang S, Song L, Zhang Y, Mandiwa C, Yang H, Liang Y, Wang Y. Sleep duration and timing in relation to osteoporosis in an elderly Chinese population: a cross-sectional analysis in the Dongfeng-Tongji cohort study. Osteoporos Int 2015; 26:2641-8. [PMID: 25986387 DOI: 10.1007/s00198-015-3172-4] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [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: 02/11/2015] [Accepted: 05/07/2015] [Indexed: 01/23/2023]
Abstract
UNLABELLED This population-based cross-sectional study in an older Chinese population shows a link between sleep duration, sleep timing, and osteoporosis risk, suggesting that sleep may have a role in osteoporosis development. These findings may help to identify contributing mechanisms and provide new opportunities for sleep-focused interventions to prevent osteoporosis. INTRODUCTION Accumulated evidence suggests that sleep pattern disruption may lead to alterations in physiology, potentially triggering the development of osteoporosis. The present study sought to examine whether sleep duration or sleep timing is associated with osteoporosis. METHODS A total of 31,769 participants (aged 45-86 years) were recruited from the Dongfeng-Tongji cohort study. All participants completed questionnaires and medical examinations and provided blood samples. The presence of osteoporosis was determined using calcaneal quantitative ultrasonography. Logistic regression models were used to evaluate the association of sleep duration and timing with osteoporosis, after adjusting for potential confounders. RESULTS The prevalence of osteoporosis was 14.2 % in men and 23.9 % in women. After controlling for potential confounders, the adjusted odds ratio (OR) [95 % confidence interval (CI)] for osteoporosis comparing sleep duration of 9 h or longer with the reference (7-8 h) was 1.40 (1.22-1.62) in men and 1.20 (1.07-1.33) in women. Men with early sleep timing (going to sleep before 21:00 h) were more likely to have osteoporosis (OR, 1.43; 95 % CI, 1.16-1.78) than those with normal sleep timing (going to sleep between 21:00 and 23:00 h). In the interaction analysis, participants with long sleep duration and early sleep timing had the highest risk of osteoporosis both in men (OR, 1.79; 95 % CI, 1.48-2.16) and women (OR, 1.41; 95 % CI, 1.19-1.66). CONCLUSIONS Long sleep duration (≥9 h) and early sleep timing were independently and interactively associated with an increased risk of osteoporosis in this older Chinese population.
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Affiliation(s)
- Y Tian
- MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - L Shen
- MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Department of Maternal and Child Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan, 430030, Hubei, China
| | - J Wu
- MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Department of Maternal and Child Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan, 430030, Hubei, China
| | - G Xu
- MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Department of Maternal and Child Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan, 430030, Hubei, China
| | - S Yang
- MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Department of Maternal and Child Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan, 430030, Hubei, China
| | - L Song
- MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Department of Maternal and Child Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan, 430030, Hubei, China
| | - Y Zhang
- MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Department of Maternal and Child Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan, 430030, Hubei, China
| | - C Mandiwa
- MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Department of Maternal and Child Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan, 430030, Hubei, China
| | - H Yang
- Dongfeng General Hospital, Dongfeng Motor Corporation and Hubei University of Medicine, Shiyan, China
| | - Y Liang
- Department of Social Medicine, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Y Wang
- MOE Key Lab of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
- Department of Maternal and Child Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road 13, Wuhan, 430030, Hubei, China.
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159
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He X, Liang W, Xu G, Guo Z. The Development and Validation of a Nomogram for Identification of Potential Donation After Cardiac Death Donors. Am J Transplant 2015; 15:2531-2. [PMID: 26211483 DOI: 10.1111/ajt.13390] [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] [Received: 04/28/2015] [Revised: 04/28/2015] [Accepted: 05/20/2015] [Indexed: 01/25/2023]
Affiliation(s)
- X He
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - W Liang
- Department of Cardiothoracic Surgery, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - G Xu
- Department of Neurosurgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - Z Guo
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
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160
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Gao YH, Guan WJ, Xu G, Gao Y, Lin ZY, Tang Y, Lin ZM, Li HM, Luo Q, Zhong NS, Birring SS, Chen RC. Validation of the Mandarin Chinese version of the Leicester Cough Questionnaire in bronchiectasis. Int J Tuberc Lung Dis 2015; 18:1431-7. [PMID: 25517807 DOI: 10.5588/ijtld.14.0195] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND The Leicester Cough Questionnaire (LCQ) has been validated for assessing cough-specific health status in bronchiectasis. We translated the LCQ into Mandarin Chinese and investigated its validity, reliability and responsiveness. METHODS The LCQ was translated into Mandarin Chinese using the forward-backward translation procedure. A total of 144 out-patients completed the Mandarin Chinese version of the LCQ (LCQ-MC), the Hospital Anxiety and Depression Scale (HADS) and the St George's Respiratory Questionnaire. Reassessments were performed during exacerbations and at 6 months. Concurrent validation, internal consistency, repeatability and responsiveness were determined. RESULTS Minor cultural adaptations were made to the wording of LCQ-MC. No other difficulties were found during the translation process, with all items easily adapted to acceptable Mandarin Chinese. The questionnaire was not changed in terms of content layout and the order of the questions. In cognitive debriefing interviews, participants reported that the questionnaire was acceptable, relevant, comprehensive and easy to complete. The LCQ-MC showed good concurrent validity, internal consistency and test-retest reliability. Responsiveness was shown by significant changes in LCQ-MC scores between steady state, the first exacerbation and following 2-week antibiotic treatment (both interval changes, P < 0.01) CONCLUSION: The LCQ-MC is a valid, reliable and responsive instrument for determining cough-specific health status in Chinese bronchiectasis patients.
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Affiliation(s)
- Y-H Gao
- State Key Laboratory of Respiratory Diseases, National Clinical Research Centre for Respiratory Disease, Guangzhou Institute of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - W-J Guan
- State Key Laboratory of Respiratory Diseases, National Clinical Research Centre for Respiratory Disease, Guangzhou Institute of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - G Xu
- State Key Laboratory of Respiratory Diseases, National Clinical Research Centre for Respiratory Disease, Guangzhou Institute of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Y Gao
- State Key Laboratory of Respiratory Diseases, National Clinical Research Centre for Respiratory Disease, Guangzhou Institute of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Z-Y Lin
- State Key Laboratory of Respiratory Diseases, National Clinical Research Centre for Respiratory Disease, Guangzhou Institute of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Y Tang
- State Key Laboratory of Respiratory Diseases, National Clinical Research Centre for Respiratory Disease, Guangzhou Institute of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Z-M Lin
- State Key Laboratory of Respiratory Diseases, National Clinical Research Centre for Respiratory Disease, Guangzhou Institute of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - H-M Li
- State Key Laboratory of Respiratory Diseases, National Clinical Research Centre for Respiratory Disease, Guangzhou Institute of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Q Luo
- State Key Laboratory of Respiratory Diseases, National Clinical Research Centre for Respiratory Disease, Guangzhou Institute of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - N-S Zhong
- tate Key Laboratory of Respiratory Diseases, National Clinical Research Centre for Respiratory Disease, Guangzhou Institute of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
| | - S S Birring
- Division of Asthma, Allergy and Lung Biology, King's College London, London, UK
| | - R-C Chen
- State Key Laboratory of Respiratory Diseases, National Clinical Research Centre for Respiratory Disease, Guangzhou Institute of Respiratory Diseases, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, Guangdong, China
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Zhong Z, Zhong M, Lu Y, Lu L, Wang J, Xu D, Wang F, Xu G, Chen J. Identification of mutations in U2HR in two Chinese families with Marie Unna hereditary hypotrichosis. Clin Exp Dermatol 2015; 41:175-8. [PMID: 26269244 DOI: 10.1111/ced.12711] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/11/2014] [Indexed: 12/01/2022]
Abstract
Marie Unna hereditary hypotrichosis (MUHH) is a rare autosomal dominant genodermatosis characterized by coarse, wiry, twisted hair developing during early childhood, with subsequent progressive hair loss. Recently, mutations in U2HR, an inhibitory upstream open reading frame in the 5' untranslated region of the human hairless gene (HR), were identified as the underlying cause of MUHH. We investigated two unrelated Chinese multigenerational families with MUHH. By sequencing U2HR in the two families, we identified two previously reported mutations, c.1A >T (p.Met1?) and c.104A>G (p*35Wext1263*). Both these mutations cosegregated with the disease phenotype in the two families.
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Affiliation(s)
- Z Zhong
- Department of Ophthalmology of Shanghai Tenth People's Hospital and Tongji Eye Institute, Tongji University School of Medicine, Shanghai, China.,Department of Regenerative Medicine and Stem Cell Research Center, Tongji University School of Medicine, Shanghai, China.,Department of Medical Genetics, Tongji University School of Medicine, Shanghai, China
| | - M Zhong
- Department of Ophthalmology of Pingxiang People's Hospital, Pingxiang, Jiangxi, China
| | - Y Lu
- Department of Ophthalmology of Shanghai Tenth People's Hospital and Tongji Eye Institute, Tongji University School of Medicine, Shanghai, China.,Department of Regenerative Medicine and Stem Cell Research Center, Tongji University School of Medicine, Shanghai, China.,Department of Medical Genetics, Tongji University School of Medicine, Shanghai, China
| | - L Lu
- Department of Ophthalmology of Shanghai Tenth People's Hospital and Tongji Eye Institute, Tongji University School of Medicine, Shanghai, China.,Department of Regenerative Medicine and Stem Cell Research Center, Tongji University School of Medicine, Shanghai, China
| | - J Wang
- Department of Ophthalmology of Shanghai Tenth People's Hospital and Tongji Eye Institute, Tongji University School of Medicine, Shanghai, China.,Department of Regenerative Medicine and Stem Cell Research Center, Tongji University School of Medicine, Shanghai, China
| | - D Xu
- Department of Ophthalmology of Shanghai Tenth People's Hospital and Tongji Eye Institute, Tongji University School of Medicine, Shanghai, China
| | - F Wang
- Department of Ophthalmology of Shanghai Tenth People's Hospital and Tongji Eye Institute, Tongji University School of Medicine, Shanghai, China
| | - G Xu
- Department of Ophthalmology of Shanghai Tenth People's Hospital and Tongji Eye Institute, Tongji University School of Medicine, Shanghai, China.,Department of Regenerative Medicine and Stem Cell Research Center, Tongji University School of Medicine, Shanghai, China
| | - J Chen
- Department of Ophthalmology of Shanghai Tenth People's Hospital and Tongji Eye Institute, Tongji University School of Medicine, Shanghai, China.,Department of Regenerative Medicine and Stem Cell Research Center, Tongji University School of Medicine, Shanghai, China.,Department of Medical Genetics, Tongji University School of Medicine, Shanghai, China
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162
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Jiang YQ, Zhu YX, Chen XL, Xu X, Li F, Fu HJ, Shen CY, Lu YY, Zhuang QJ, Xu G, Cai YY, Zhang Y, Liu SS, Zhu MY, Li SH. Impact of adherence to GOLD guidelines on 6-minute walk distance, MRC dyspnea scale score, lung function decline, quality of life, and quality-adjusted life years in a Shanghai suburb. Genet Mol Res 2015; 14:8861-70. [PMID: 26345817 DOI: 10.4238/2015.august.3.9] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
We performed a 1-year cluster-randomized field trial to assess the effect of standardized management of chronic obstructive pulmonary disease (COPD) on lung function and quality of life (QOL) measures in patients in China. We used the Global Initiative for Chronic Obstructive Lung Disease (GOLD) treatment guidelines and assessed indexes including pulmonary function, QOL, quality-adjusted life years (QALY), Medical Research Council (MRC) dyspnea scale, 6-min walk distance (6-MWD), number of emergency visits, and frequency of hospitalization. Of a total of 711 patients with chronic cough and asthma, 132 were diagnosed as having COPD and 102 participated in this study [intervention group (N = 47); control group (N = 55)]. We found that adherence to GOLD guidelines had a perceivable impact on 6-MWD, MRC dyspnea scale score, and QOL. The average QALY increased by 1.42/person/year in the intervention group, but declined by 0.95/person/year in the control group. We conclude that standardized management improves disease severity, QOL, and QALY in COPD patients when treatment protocols adhere to GOLD guidelines.
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Affiliation(s)
- Y Q Jiang
- Shanghai Municipal First People's Hospital Affiliated to Shanghai Jiaotong University, Shanghai, China
| | - Y X Zhu
- Songjiang Branch of Shanghai Municipal First People's Hospital Affiliated to Shanghai Jiaotong University, Shanghai, China
| | - X L Chen
- Songjiang Branch of Shanghai Municipal First People's Hospital Affiliated to Shanghai Jiaotong University, Shanghai, China
| | - X Xu
- Songjiang Branch of Shanghai Municipal First People's Hospital Affiliated to Shanghai Jiaotong University, Shanghai, China
| | - F Li
- Songjiang Branch of Shanghai Municipal First People's Hospital Affiliated to Shanghai Jiaotong University, Shanghai, China
| | - H J Fu
- Xiaokunshan Town Primary Care of Songjiang District, Shanghai, China
| | - C Y Shen
- Xiaokunshan Town Primary Care of Songjiang District, Shanghai, China
| | - Y Y Lu
- Xiaokunshan Town Primary Care of Songjiang District, Shanghai, China
| | - Q J Zhuang
- Xinbang Town Primary Care of Songjiang District, Shanghai, China
| | - G Xu
- School of Public Health, Shanghai Jiao Tong University, Shanghai, China
| | - Y Y Cai
- Institute of Respiratory Disease, Zhongshan Hospital Affiliated to Fudan University, Shanghai, China
| | - Y Zhang
- Shanghai Songjiang District Public Health Bureau, Shanghai, China
| | - S S Liu
- Shanghai Songjiang District Center for Diseases Control and Prevention, Shanghai, China
| | - M Y Zhu
- Shanghai Songjiang District Center for Diseases Control and Prevention, Shanghai, China
| | - S H Li
- Songjiang Branch of Shanghai Municipal First People's Hospital Affiliated to Shanghai Jiaotong University, Shanghai, China
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He X, Xu G, Liang W, Liu B, Xu Y, Luan Z, Lu Y, Ko DSC, Manyalich M, Schroder PM, Guo Z. Nomogram for Predicting Time to Death After Withdrawal of Life-Sustaining Treatment in Patients With Devastating Neurological Injury. Am J Transplant 2015; 15:2136-42. [PMID: 25810114 DOI: 10.1111/ajt.13231] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Revised: 01/15/2015] [Accepted: 01/16/2015] [Indexed: 01/25/2023]
Abstract
Reliable prediction of time of death after withdrawal of life-sustaining treatment in patients with devastating neurological injury is crucial to successful donation after cardiac death. Herein, we conducted a study of 419 neurocritical patients who underwent life support withdrawal at four neurosurgical centers in China. Based on a retrospective cohort, we used multivariate Cox regression analysis to identify prognostic factors for patient death, which were then integrated into a nomogram. The model was calibrated and validated using data from an external retrospective cohort and a prospective cohort. We identified 10 variables that were incorporated into a nomogram. The C-indexes for predicting the 60-min death probability in the training, external validation and prospective validation cohorts were 0.96 (0.93-0.98), 0.94 (0.91-0.97), and 0.99 (0.97-1.00), respectively. The calibration plots after WLST showed an optimal agreement between the prediction of time to death by the nomogram and the actual observation for all cohorts. Then we identified 22, 26 and 37 as cut-points for risk stratification into four groups. Kaplan-Meier curves indicated distinct prognoses between patients in the different risk groups (p < 0.001). In conclusion, we have developed and validated a nomogram to accurately identify potential cardiac death donors in neurocritical patients in a Chinese population.
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Affiliation(s)
- X He
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - G Xu
- Department of Neurosurgery, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - W Liang
- Department of Cardiothoracic Surgery, The First Affiliated Hospital of Guangzhou Medical University, Guangzhou, China
| | - B Liu
- Department of Neurosurgery, The People's Hospital of Dongguan City, Dongguan, China
| | - Y Xu
- Department of Neurosurgery, The First People's Hospital of Foshan City, Foshan, China
| | - Z Luan
- Department of Neurosurgery, Jiangmen Central Hospital, Jiangmen, China
| | - Y Lu
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
| | - D S C Ko
- Departments of Urology and Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, MA
| | - M Manyalich
- TPM-DTI Foundation, Parc Científic de Barcelona, Barcelona, Spain
| | - P M Schroder
- University of Toledo College of Medicine, Toledo, OH
| | - Z Guo
- Organ Transplant Center, The First Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
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164
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Guan WJ, Gao YH, Xu G, Lin ZY, Tang Y, Li HM, Lin ZM, Jiang M, Zheng JP, Chen RC, Zhong NS. Inflammatory Responses, Spirometry, and Quality of Life in Subjects With Bronchiectasis Exacerbations. Respir Care 2015; 60:1180-9. [PMID: 26060319 PMCID: PMC10044274 DOI: 10.4187/respcare.04004] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
BACKGROUND Bronchiectasis exacerbations are critical events characterized by worsened symptoms and signs (ie, cough frequency, sputum volume, malaise). OBJECTIVES Our goal was to examine variations in airway and systemic inflammation, spirometry, and quality of life during steady state, bronchiectasis exacerbations, and convalescence (1 week following a 2-week antibiotic treatment) to determine whether potentially pathogenic microorganisms, including Pseudomonas aeruginosa, were associated with poorer conditions during bronchiectasis exacerbations. METHODS Peripheral blood and sputum were sampled to detect inflammatory mediators and bacterial densities. Spirometry and quality of life (St George Respiratory Questionnaire [SGRQ]) were assessed during the 3 stages. RESULTS Forty-eight subjects with bronchiectasis (43.2 ± 14.2 y of age) were analyzed. No notable differences in species and density of potentially pathogenic microorganisms were found during bronchiectasis exacerbations. Except for CXCL8 and tumor necrosis factor alpha (TNF-α), serum inflammation was heightened during bronchiectasis exacerbations and recovered during convalescence. Even though sputum TNF-α was markedly higher during bronchiectasis exacerbations and remained heightened during convalescence, the variations in miscellaneous sputum markers were unremarkable. Bronchiectasis exacerbations were associated with notably higher SGRQ symptom and total scores, which recovered during convalescence. FVC, FEV1, and maximum mid-expiratory flow worsened during bronchiectasis exacerbations (median change from baseline of -2.2%, -0.8%, and -1.3%) and recovered during convalescence (median change from baseline of 0.6%, 0.7%, and -0.7%). Compared with no bacterial isolation, potentially pathogenic microorganism or P. aeruginosa isolation at baseline did not result in poorer clinical condition during bronchiectasis exacerbations. CONCLUSIONS Bronchiectasis exacerbations are characterized by heightened inflammatory responses and poorer quality of life and spirometry, but not by increased bacterial density, which applies for subjects with and without potentially pathogenic microorganism isolation when clinically stable. (ClinicalTrials.gov registration NCT01761214.).
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165
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Zeng S, Zhou J, Peng Q, Tian L, Xu G, Zhao Y, Wang T, Zhou Q. Assessment by three-dimensional power Doppler ultrasound of cerebral blood flow perfusion in fetuses with congenital heart disease. Ultrasound Obstet Gynecol 2015; 45:649-656. [PMID: 25615948 DOI: 10.1002/uog.14798] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2014] [Revised: 01/11/2015] [Accepted: 01/15/2015] [Indexed: 06/04/2023]
Abstract
OBJECTIVES To use three-dimensional (3D) power Doppler ultrasound to investigate cerebral blood flow perfusion in fetuses with congenital heart disease (CHD). METHODS The vascularization index (VI), flow index (FI) and vascularization flow index (VFI) in the total intracranial volume and the main arterial territories (middle cerebral artery (MCA), anterior cerebral artery (ACA) and posterior cerebral artery (PCA)) were evaluated prospectively and compared in 112 fetuses with CHD and 112 normal fetuses using 3D power Doppler. Correlations between the 3D power Doppler indices and neurodevelopment scores at 12 months of age were assessed in a subset of the CHD group, and values were compared with those of controls. RESULTS Compared with the controls, the VI, FI and VFI of the total intracranial volume and the three main arteries were significantly higher in fetuses with hypoplastic left heart syndrome and left-sided obstructive lesions (P < 0.001), and the 3D power Doppler values in the ACA territory were significantly higher in fetuses with transposition of the great arteries (P < 0.01). The largest proportional increase in the blood flow perfusion indices in the fetuses with CHD relative to controls was observed in the ACA territory (P < 0.05). Among 41 cases with CHD that underwent testing, the mean Psychomotor Development Index (PDI) and Mental Development Index (MDI) scores were significantly lower than in 94 of the controls that were tested (P < 0.001). Among these CHD cases, total intracranial FI was positively correlated with PDI (r = 0.342, P = 0.029) and MDI (r = 0.339, P = 0.030), and ACA-VI and ACA-VFI were positively correlated with PDI (r = 0.377 and 0.389, P = 0.015 and 0.012, respectively) but were not correlated with MDI (r = 0.243 and 0.203, P = 0.126 and 0.204, respectively). CONCLUSIONS Cerebral blood flow perfusion was increased relative to controls in most fetuses with CHD and was associated with neurodevelopment scores at 12 months. Prenatal 3D power Doppler ultrasound might help to identify cases of brain vasodilatation earlier and inform parental counseling.
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Affiliation(s)
- S Zeng
- Department of Ultrasonography, The Second Xiangya Hospital, Central South University, Hunan, PR China
| | - J Zhou
- Department of Ultrasonography, The Second Xiangya Hospital, Central South University, Hunan, PR China
| | - Q Peng
- Department of Ultrasonography, The Second Xiangya Hospital, Central South University, Hunan, PR China
| | - L Tian
- Department of Ultrasonography, The Second Xiangya Hospital, Central South University, Hunan, PR China
| | - G Xu
- Department of Ultrasonography, The Second Xiangya Hospital, Central South University, Hunan, PR China
| | - Y Zhao
- Department of Ultrasonography, The Second Xiangya Hospital, Central South University, Hunan, PR China
| | - T Wang
- Department of Pediatrics, The Second Xiangya Hospital, Central South University, Changsha, Hunan, PR China
| | - Q Zhou
- Department of Ultrasonography, The Second Xiangya Hospital, Central South University, Hunan, PR China
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Xu G, Ji C, Song G, Zhao C, Shi C, Song L, Chen L, Yang L, Huang F, Pang L, Zhang N, Zhao Y, Guo X. MiR-26b modulates insulin sensitivity in adipocytes by interrupting the PTEN/PI3K/AKT pathway. Int J Obes (Lond) 2015; 39:1523-30. [PMID: 25999046 DOI: 10.1038/ijo.2015.95] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.0] [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] [Received: 10/07/2014] [Revised: 05/06/2015] [Accepted: 05/17/2015] [Indexed: 01/14/2023]
Abstract
BACKGROUND MicroRNAs (miRNAs) have emerged as epigenetic regulators of metabolism and energy homeostasis. There is a growing body of evidence pointing to miRNAs that have important regulatory roles in insulin sensitivity. OBJECTIVE The aim of this work was to explore the expression and mechanism of action of miR-26b in obesity-related insulin resistance (IR) in adipocytes. METHODS Quantitative real-time PCR was performed to determine miR-26b expression in obese rodent models, human obesity subjects and insulin-resistant adipocytes. We analysed the roles of miR-26b overexpression and inhibition on glucose uptake in adipocytes. Western blotting was used to detect the levels of protein molecules involved in the phosphoinositide-3-kinase (PI3K) pathway. Bioinformatics and the Dual Luciferase Assay were used to identify the target gene of miR-26b. We assessed the regulatory roles of miR-26b on the phosphatase and tensin homologue (PTEN)/PI3K/AKT pathway and the relationship between miR-26b and the metabolism of human obese subjects. RESULTS Levels of miR-26b are reduced in visceral adipose tissue (VAT) in obese rodent models, human obesity and insulin-resistant adipocytes. MiR-26b promotes insulin-stimulated glucose uptake and increases insulin-stimulated glucose transporter type 4 translocation to the plasma membrane in human mature adipocytes. MiR-26b modulates insulin-stimulated AKT activation via inhibition of its target gene, PTEN, and significantly increases insulin sensitivity via the PTEN/PI3K/AKT pathway. The expression level of miR-26b negatively correlates with increasing body mass index and homeostasis model assessment for IR in human obese subjects. CONCLUSION Decreased miR-26b expression in VAT may be involved in obesity-related IR by interrupting the PTEN/PI3K/AKT pathway.
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Affiliation(s)
- G Xu
- Department of Clinical Laboratory, The 82nd Hospital of the People's Liberation Army, Huaian, China
| | - C Ji
- Department of Children Health Care, Nanjing Maternity and Child Health Care Hospital Affiliated to Nanjing Medical University, Nanjing, China
| | - G Song
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - C Zhao
- Department of Clinical Laboratory, The 82nd Hospital of the People's Liberation Army, Huaian, China
| | - C Shi
- Department of Children Health Care, Nanjing Maternity and Child Health Care Hospital Affiliated to Nanjing Medical University, Nanjing, China
| | - L Song
- Department of Clinical Laboratory, The 82nd Hospital of the People's Liberation Army, Huaian, China
| | - L Chen
- Institute of Pediatrics, Nanjing Medical University, Nanjing, China
| | - L Yang
- Institute of Pediatrics, Nanjing Medical University, Nanjing, China
| | - F Huang
- Institute of Pediatrics, Nanjing Medical University, Nanjing, China
| | - L Pang
- Institute of Pediatrics, Nanjing Medical University, Nanjing, China
| | - N Zhang
- Department of Clinical Laboratory, The 82nd Hospital of the People's Liberation Army, Huaian, China
| | - Y Zhao
- Department of Clinical Laboratory, The 82nd Hospital of the People's Liberation Army, Huaian, China
| | - X Guo
- Department of Children Health Care, Nanjing Maternity and Child Health Care Hospital Affiliated to Nanjing Medical University, Nanjing, China
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Shi J, Fu QL, Zhang H, Cheng L, Wang YJ, Zhu DD, Lv W, Liu SX, Li PZ, Ou CQ, Xu G. Epidemiology of chronic rhinosinusitis: results from a cross-sectional survey in seven Chinese cities. Allergy 2015; 70:533-9. [PMID: 25631304 PMCID: PMC4409092 DOI: 10.1111/all.12577] [Citation(s) in RCA: 262] [Impact Index Per Article: 29.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/15/2015] [Indexed: 02/05/2023]
Abstract
BACKGROUND Chronic sinusitis (CRS) is a common otorhinolaryngologic disease that is frequently encountered in everyday practice, but there is a lack of precise data regarding the prevalence of CRS in developing countries. We performed a national investigation in China to determine the prevalence and associated factors of CRS. METHODS We conducted a cross-sectional investigation in 2012. A stratified four-stage sampling method was used to select participants randomly from seven cities in mainland China. All participants were interviewed face-to-face via a standardized questionnaire. Unconditional logistic regression analyses were conducted to examine the association between smoking and sinusitis after adjusting for socio-demographic factors. RESULTS This study included a total of 10 636 respondents from seven cities. The overall prevalence of CRS was 8.0% and ranged from 4.8% to 9.7% in seven centres. Chronic sinusitis affected approximately 107 million people in mainland China. Chronic sinusitis was particularly prevalent among people with specific medical conditions, including allergic rhinitis, asthma, chronic obstructive pulmonary disease and gout. The prevalence was slightly higher among males (8.79%) than females (7.28%) (P = 0.004), and the prevalence varied by age group, ethnicity and marital status and education (P < 0.05), but not by household per capita income or living space (P > 0.05). Both second-hand tobacco smoke and active smoking were independent risk factors for CRS (P = 0.001). CONCLUSIONS Chronic sinusitis is an important public health problem in China. Our study provides important information for the assessment of the economic burden of CRS and the development and promotion of public health policies associated with CRS particularly in developing countries.
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Affiliation(s)
- J.B. Shi
- Otorhinolaryngology Hospital The First Affiliated Hospital Sun Yat‐sen University Guangzhou China
| | - Q. L. Fu
- Otorhinolaryngology Hospital The First Affiliated Hospital Sun Yat‐sen University Guangzhou China
| | - H. Zhang
- Department of Otorhinolaryngology, The First Affiliated Hospital Xinjiang Medical University Urumqi China
| | - L. Cheng
- Department of Otorhinolaryngology The First Affiliated Hospital Nanjing Medical University Nanjing China
| | - Y. J. Wang
- Department of Otorhinolaryngology Union Hospital Tongji Medical College Huazhong University of Science and Technology Wuhan China
| | - D. D. Zhu
- Department of Otolaryngology Head and Neck China‐Japan Union Hospital Jilin University Changchun China
| | - W. Lv
- Department of Otolaryngology Peking Union Medical College Hospital Beijing China
| | - S. X. Liu
- Department of Otorhinolaryngology West China Hospital of Medicine Sichuan University Chengdu China
| | - P. Z. Li
- Department of Otorhinolaryngology Affiliated Huai'an First People's Hospital Nanjing Medical University Huaian China
| | - C. Q. Ou
- State Key Laboratory of Organ Failure Research Department of Biostatistics School of Public Health and Tropical Medicine Southern Medical University Guangzhou China
| | - G. Xu
- Otorhinolaryngology Hospital The First Affiliated Hospital Sun Yat‐sen University Guangzhou China
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168
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Hoene M, Li J, Häring HU, Xu G, Weigert C, Lehmann R. Muscle- and liver-specific alterations in lipid and acylcarnitine metabolism after a single bout of exercise in mice. DIABETOL STOFFWECHS 2015. [DOI: 10.1055/s-0035-1549695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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169
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Lehmann R, Liu X, Hoene M, Peter A, Häring HU, Xu G. Wird die Probenqualität vieler Biobankproben überschätzt? Eine internationale Studie. DIABETOL STOFFWECHS 2015. [DOI: 10.1055/s-0035-1549702] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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170
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Fan YH, Ding J, Nguyen S, Liu XJ, Xu G, Zhou HY, Duan NN, Yang SM, Zern MA, Wu J. Aberrant hedgehog signaling is responsible for the highly invasive behavior of a subpopulation of hepatoma cells. Oncogene 2015; 35:116-24. [DOI: 10.1038/onc.2015.67] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2014] [Accepted: 01/14/2015] [Indexed: 02/07/2023]
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Abstract
Phenotypic diversity is a direct consequence resulting mainly from the impact of underlying genetic variation, and recent studies have shown that copy number variation (CNV) is emerging as an important contributor to both phenotypic variability and disease susceptibility. Herein, we performed a genome-wide CNV scan in 96 chickens from 12 diversified breeds, benefiting from the high-density Affymetrix 600 K SNP arrays. We identified a total of 231 autosomal CNV regions (CNVRs) encompassing 5.41 Mb of the chicken genome and corresponding to 0.59% of the autosomal sequence. The length of these CNVRs ranged from 2.6 to 586.2 kb with an average of 23.4 kb, including 130 gain, 93 loss and eight both gain and loss events. These CNVRs, especially deletions, had lower GC content and were located particularly in gene deserts. In particular, 102 CNVRs harbored 128 chicken genes, most of which were enriched in immune responses. We obtained 221 autosomal CNVRs after converting probe coordinates to Galgal3, and comparative analysis with previous studies illustrated that 153 of these CNVRs were regarded as novel events. Furthermore, qPCR assays were designed for 11 novel CNVRs, and eight (72.73%) were validated successfully. In this study, we demonstrated that the high-density 600 K SNP array can capture CNVs with higher efficiency and accuracy and highlighted the necessity of integrating multiple technologies and algorithms. Our findings provide a pioneering exploration of chicken CNVs based on a high-density SNP array, which contributes to a more comprehensive understanding of genetic variation in the chicken genome and is beneficial to unearthing potential CNVs underlying important traits of chickens.
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Affiliation(s)
- G Yi
- National Engineering Laboratory for Animal Breeding and MOA Key Laboratory of Animal Genetics and Breeding, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, China
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Zhu J, Liu Q, Jiang Y, Wu L, Xu G, Liu X. Enhanced angiogenesis promoted by human umbilical mesenchymal stem cell transplantation in stroked mouse is Notch1 signaling associated. Neuroscience 2015; 290:288-99. [PMID: 25637797 DOI: 10.1016/j.neuroscience.2015.01.038] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [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: 09/12/2014] [Revised: 11/18/2014] [Accepted: 01/08/2015] [Indexed: 12/16/2022]
Abstract
Cellular therapy has provided hope for restoring neurological function post stroke through promoting endogenous neurogenesis, angiogenesis and synaptogenesis. The current study was based on the observation that transplantation of human umbilical cord mesenchymal stem cells (hUCMSCs) promoted the neurological function improvement in stroked mice and meanwhile enhanced angiogenesis in the stroked hemisphere. Grafted hUCMSCs secreted human vascular endothelial growth factor A (VEGF-A). Notch1 signaling was activated after stroke and also in the grafted hUCMSCs. To address the potential mechanism that might mediate such pro-angiogenic effect, we established a hUCMSC-neuron co-culture system. Neurons were subjected to oxygen glucose deprivation (OGD) injury before co-culturing to mimic the in vivo cell transplantation. Consistent with the in vivo data, co-culture medium claimed from hUCMSC-OGD neuron co-culture system significantly promoted the capillary-like tube formation of brain-derived endothelial cells. Moreover, coincident with our in vivo data, Notch 1 signaling activation was detected in hUCMSCs after co-cultured with OGD neurons as demonstrated by the up-regulation of key Notch1 signaling components Notch1 and Notch1 intercellular domain (NICD). In addition, OGD-neuron co-culture also increased the VEGF-A production by hUCMSCs. To verify whether Notch1 activation was involved in the pro-angiogenic effect, γ-secretase inhibitor N-[N-(3,5-difluorophenacetyl)-L-alanyl]-S-phenylglycine t-butyl ester (DAPT) was added into the co-culture medium before co-culture. It turned out that DAPT significantly prevented the Notch1 activation in hUCMSCs after co-culture with OGD neurons. More importantly, the pro-angiogenic effect of hUCMSCs was remarkably abolished by DAPT addition as demonstrated by inhibited capillary-like tube formation and less VEGF-A production. Regarding how Notch1 signaling was linked with VEGF-A secretion, we provided some clue that Notch1 effector Hes1 mRNA expression was significantly up-regulated by OGD-neuron co-culturing and down-regulated after additional treatment of DAPT. In summary, our data provided evidence that the VEGF-A secretion from hUCMSCs after being triggered by OGD neurons is Notch1 signaling associated. This might be a possible mechanism that contributes to the angiogenic effect of hUCMSC transplantation in stroked brain.
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Affiliation(s)
- J Zhu
- Department of Neurology, Jinling Hospital, Medical School of Nanjing University, 305 East Zhongshan Road, Nanjing 210002, Jiangsu, China.
| | - Q Liu
- Department of Neurology, Jinling Hospital, Medical School of Nanjing University, 305 East Zhongshan Road, Nanjing 210002, Jiangsu, China.
| | - Y Jiang
- Department of Neurology, Jinling Hospital, Medical School of Nanjing University, 305 East Zhongshan Road, Nanjing 210002, Jiangsu, China.
| | - L Wu
- Department of Neurology, Jinling Hospital, Medical School of Nanjing University, 305 East Zhongshan Road, Nanjing 210002, Jiangsu, China.
| | - G Xu
- Department of Neurology, Jinling Hospital, Medical School of Nanjing University, 305 East Zhongshan Road, Nanjing 210002, Jiangsu, China.
| | - X Liu
- Department of Neurology, Jinling Hospital, Medical School of Nanjing University, 305 East Zhongshan Road, Nanjing 210002, Jiangsu, China.
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Zhao J, Xu G, Qian YWD, Li YWY. Down-regulation of miR-205 promotes stemness of hepatocellular carcinoma cells by targeting PLCβ1 and increasing CD24 expression. Neoplasma 2015; 62:567-73. [PMID: 25997960 DOI: 10.4149/neo_2015_068] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Hepatocellular carcinoma (HCC) is a particularly lethal form of cancer. Overall survival evenafter liver surgery is unsatisfactory due to high metastatic capacity and recurrence rates. Cancer stem cells (CSCs) were recently proposed to elucidate the molecular mechanism of HCC metastasis and recurrence. In our study, we found that down-regulation of miR-205 promoted stem cell inhibition of HCC.Expression of miR-205 and PLCβ1 was investigated by qRT-PCR. MiR-205 and PLCΒ1 expression were associated with disease free survival(DFS) by log-rank test. Computational predicting software was used to predict potential targets of miR-205. MiR-205 and PLCΒ1 were transfected into cells to analyze the stem cell inhibition. MiR-205 was significantly down-regulated and PLCβ1 dramatically up-regulated in tumors compared with matched tissues (P<0.0001). High miR-205 and low PLCβ1 expression was found to be associated with better DFS. PLCβ1 was one of the potential targets of miR-205 and the dual luciferase report system demonstrated that PLCβ1 was a direct target of miR-205 in cells. When miR-205 and PLCβ1 were transfected into cells, we found that the number of spheres increased and the CD24+ subpopulation of HCC cells dramatically increased.Down-regulation of miR-205 promotes stem cell inhibition of HCC by targeting PLCβ1 and increasing CD24 expression.
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174
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Sun TJ, Tao R, Han YQ, Xu G, Liu J, Han YF. Wnt3a promotes human umbilical cord mesenchymal stem cells to differentiate into epidermal-like cells. Eur Rev Med Pharmacol Sci 2015; 19:86-91. [PMID: 25635980] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE Mesenchymal stem cells are a population of pluripotent cells that can differentiate into epidermal-like cells under certain conditions. Wnt3a can promote the proliferation and differentiation of stem cells. However, the role of Wnt3a in the differentiation of human umbilical cord mesenchymal stem cells (hUCMSCs) into epidermal-like cells is unknown. MATERIALS AND METHODS Third-generation hUCMSCs were cultured in normal medium, epidermal stem cell-conditioned medium, and conditioned medium with added Wnt3a. After culturing for 5 days, the expression of cytokeratin 19 (CK19), an antigen specific for epidermal-like cells, was assessed by immunofluorescence and flow cytometry. The expression of CK19 mRNA was confirmed by reverse transcription-polymerase chain reaction(RT-PCR), and β-catenin expression was detected by western blot. RESULTS hUCMSCs differentiated into epidermal-like cells when cultured in conditioned medium as shown by positive immunofluorescence staining for CK19. Flow cytometry showed that the number of cells positive for CK19 in the epidermal stem cell-conditioned medium group was significantly higher than that of control group, but lower than that of the Wnt3a-conditioned group (p < 0.05). RT-PCR showed that the expression level of CK19 mRNA in the conditioned medium group was significantly lower than that of the Wnt3a group (p < 0.01). Westernblots showed that the expression of β-catenin in the conditioned medium group was significantly lower than that of the Wnt3a group (p < 0.01). CONCLUSIONS These results suggest that Wnt3a can effectively promote the differentiation of hUCMSCs into epidermal-like cells.
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Affiliation(s)
- T-J Sun
- Department of Burn and Plastic Surgery, Hainan Branch of People's Liberation Army General Hospital, Sanya, People's Republic of China.
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175
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Wang M, Xu G, Wang D, Zou Y, Frey W, Buchmeiser MR. Group 4 metal complexes bearing the aminoborane motif: origin of tandem ring-opening metathesis/vinyl-insertion polymerization. Polym Chem 2015. [DOI: 10.1039/c5py00303b] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The origin of tandem ring-opening metathesis/vinyl-insertion polymerization using tailored group 4 metal complexes is outlined.
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Affiliation(s)
- M. Wang
- Lehrstuhl für Makromolekulare Stoffe und Faserchemie
- Institut für Polymerchemie
- Universität Stuttgart
- D-70569 Stuttgart
- Germany
| | - G. Xu
- Lehrstuhl für Makromolekulare Stoffe und Faserchemie
- Institut für Polymerchemie
- Universität Stuttgart
- D-70569 Stuttgart
- Germany
| | - D. Wang
- Lehrstuhl für Makromolekulare Stoffe und Faserchemie
- Institut für Polymerchemie
- Universität Stuttgart
- D-70569 Stuttgart
- Germany
| | - Y. Zou
- Lehrstuhl für Makromolekulare Stoffe und Faserchemie
- Institut für Polymerchemie
- Universität Stuttgart
- D-70569 Stuttgart
- Germany
| | - W. Frey
- Institut für Organische Chemie
- Universität Stuttgart
- D-70569 Stuttgart
- Germany
| | - M. R. Buchmeiser
- Lehrstuhl für Makromolekulare Stoffe und Faserchemie
- Institut für Polymerchemie
- Universität Stuttgart
- D-70569 Stuttgart
- Germany
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Chen T, Xu G, Tan D, Wu C. Effects of platelet infusion, anticoagulant and other risk factors on the rehaemorrhagia after surgery of hypertensive cerebral hemorrhage. Eur Rev Med Pharmacol Sci 2015; 19:795-799. [PMID: 25807432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
OBJECTIVE Our objective is to explore the effect of platelet infusion, anticoagulant and other risk factors on the rehaemorrhagia after surgery of hypertensive cerebral hemorrhage (HCH), and to provide a reference for the prevention and treatment of rehaemorrhagia in patients with HCH. PATIENTS AND METHODS The patients with HCH admitted during April, 2007-June, 2012 in our hospital were selected. The general data such as age and gender, disease course, past pathogenic characters, past and present medical history such as treatment, personal history, family history and son on, were collected. The data were analyzed by t test, ANOVA, Chi-squared test and logistic regression analysis. RESULTS The application of aspirin and platelets has significant effect on rehaemorrhagia after surgery of HCH: 72 patients received aspirin, of which 14 cases had rehaemorrhagia while 197 patients did not receive aspirin, of which 20 cases had rehaemorrhagia. The difference between these two groups was statistically significant (p < 0.05). 186 patients received platelet infusions, of which 18 cases had rehaemorrhagia whereas among other 83 patients not receiving platelet infusions, 16 cases had rehaemorrhagia. Statistical analysis showed a significant difference between these two groups (p < 0.05). In the univariate logistic regression analysis of related data in patients with rehaemorrhagia after surgery of HCH, diastolic or systolic blood pressure at admission, the time from onset to surgery, coagulation disorder, surgical method, hematoma volume, cerebral hemia, effect of hematoma clearance and GCS at admission were the potential risk factors for rehaemorrhagia after surgery of HCH (p < 0.05). In the multivariate logistic regression analysis of related data in the same patients, diastolic blood pressure at admission (> 120 mmHg), systolic blood pressure at admission (> 200 mmHg), the time from onset to surgery and coagulation disorder were screened out (p < 0.05) to be associated with rehaemorrhagia. CONCLUSIONS Aspirin increased the risk of rehaemorrhagia after surgery of HCH. On the contrary, infusion of platelets decreased the risk of rehaemorrhagia and improved the prognosis of patients. High diastolic and/or high systolic blood pressure at admission, ultra-early surgery after onset of HCH and coagulation disorder were related with rehaemorrhagia after operation of HCH. Our results indicate that rehaemorrhagia rate can be decreased by controlling related risk factors.
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Affiliation(s)
- T Chen
- Department of Neurosurgery, Qilu Hospital of Shandong University, Jinan, China.
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177
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Xu G, Li N. A comparison study on mental health status between suicide survivors and survivors of accidental deaths in rural China. J Psychiatr Ment Health Nurs 2014; 21:859-65. [PMID: 24646431 DOI: 10.1111/jpm.12147] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 01/31/2014] [Indexed: 11/30/2022]
Abstract
Suicide has become a major public health problem worldwide. For every suicide there are six suicide survivors, a term referring to family members or friends of a person who has died by suicide. Within the literature there has been ongoing debate regarding the bereavement process and if it differs in survivors of suicide as opposed to survivors of those who have died from accidental death. There are scarcely any published reports on comparison between these two groups of survivors in China. In this study, we aimed to explore the difference of mental health status between suicide survivors and survivors of accidental deaths in China. We used a cross-sectional study design to collect data of survivors. Consecutive sampling was used and 92 suicide survivors and 64 survivors of accidental deaths were interviewed. The Symptom Checklist-90-Revised was used to assess the survivors' mental health status. After controlling for demographic variables and time interval between death and interview, no significant differences were found on mental health status between these two groups of survivors. Several explanations might account for the lack of differences. Further studies employing qualitative measures and suicide-specific instruments are needed to explore the bereavement of Chinese suicide survivors.
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Affiliation(s)
- G Xu
- Tianjin Anding Hospital, Tianjin Mental Health Center, China
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178
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Liu H, Ye YK, Li GM, Zhou Y, Han KB, Xu G, Wang D. Diagnosis of lymph node micrometastasis at the pN₀ stage of lung adenocarcinoma using a combination of markers. Genet Mol Res 2014; 13:5594-600. [PMID: 25117316 DOI: 10.4238/2014.july.25.14] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
This study aimed to detect micrometastatic tumor cells in the lymph nodes of patients with pN0 lung adenocarcinoma using a combination of thyroid transcription factor-1 (TTF-1) expression and cytokeratin 7 (CK7) expression and to investigate the association of lymph node micrometastasis with the clinicopathological characteristics of patients with lung adenocarcinoma. A total of 54 patients with pN0 lung adenocarcinoma and whose primary tumors were positive for both TTF-1 and CK7 expression were included in this study. In total, 893 lymph nodes were obtained from these 54 patients and were analyzed for micrometastasis by immunohistochemical staining with anti-CK7 and anti-TTF-1 antibodies. CK7- and TTF-1-positive cells were found in the lymph nodes of 9 (16.7%) of 54 patients, and 21 (2.4%) of 893 lymph nodes exhibited positivity for these factors. No cells positive for both CK7 and TTF-1 were detected in the 5 lymph nodes obtained from patients with benign lung tumors. Lymph node micrometastasis was found to be associated with the differentiation grade and primary tumor position (P < 0.05). The detection of lymph node micrometastasis by a combination of CK7 and TTF-1 immunohistochemical staining provides a more accurate assessment of tumor staging for pN0 lung adenocarcinoma.
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Affiliation(s)
- H Liu
- Department of Thoracic Surgery, Jingdu Hospital, Nanjing, China
| | - Y-K Ye
- Department of Thoracic Surgery, Jingdu Hospital, Nanjing, China
| | - G-M Li
- Department of Pathology, Jingdu Hospital, Nanjing, China
| | - Y Zhou
- Department of Thoracic Surgery, Jingdu Hospital, Nanjing, China
| | - K-B Han
- Department of Thoracic Surgery, Jingdu Hospital, Nanjing, China
| | - G Xu
- Department of Thoracic Surgery, Jingdu Hospital, Nanjing, China
| | - D Wang
- Department of Thoracic Surgery, Jingdu Hospital, Nanjing, China
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179
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Zhang Z, Xu G, Zhu W, Cao L, Bai W, Xiong Y, Yan B, Liu X. Chromosome 12p13 variants predict recurrence of ischaemic stroke in a Chinese population. Eur J Neurol 2014; 21:1400-5. [PMID: 24995625 DOI: 10.1111/ene.12508] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Accepted: 05/26/2014] [Indexed: 11/29/2022]
Abstract
BACKGROUND AND PURPOSE A recent genome-wide association study identified two genetic variants (rs12425791 and rs11833579) on chromosome 12p13 that confer risk of ischaemic stroke. The purpose of this study was to examine whether these two polymorphisms are associated with stroke onset and prognosis in a Chinese population. METHODS rs12425791 and rs11833579 were genotyped using the improved multiple ligase detection reaction in 913 patients with ischaemic stroke. Analyses of genotype association with onset and prognosis outcomes were evaluated by the Kaplan-Meier method, the log-rank test and Cox proportional hazards models. RESULTS rs12425791 and rs11833579 were not associated with age of stroke onset (P = 0.786 and 0.340, respectively). However, these two polymorphisms were significantly associated with risk of stroke recurrence, especially for the large-artery atherosclerosis (LAA) subtype, in recessive models [hazard ratio (HR) 2.52; 95% confidence interval (CI) 1.04-6.12 for rs12425791; HR 2.13; 95% CI 1.03-4.40 for rs11833579]. The combined genotype of these two single-nucleotide polymorphisms showed a locus-dosage effect on recurrence of LAA subtype and was an independent prognostic factor for LAA subtype in the final multivariate Cox regression model. CONCLUSIONS These findings indicated that rs12425791 and rs11833579 on chromosome 12p13 may be useful biomarkers for predicting the prognosis of patients with the LAA subtype of ischaemic stroke.
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Affiliation(s)
- Z Zhang
- Department of Neurology, Jinling Hospital, Nanjing University School of Medicine, Nanjing, China
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180
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Halioua Y, Xu G, Moumdji S, Li LH, Davies AG, Linfield EH, Colombelli R. THz quantum cascade lasers operating on the radiative modes of a 2D photonic crystal. Opt Lett 2014; 39:3962-3965. [PMID: 24978782 DOI: 10.1364/ol.39.003962] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Photonic-crystal lasers operating on Γ-point band-edge states of a photonic structure naturally exploit the so-called "nonradiative" modes. As the surface output coupling efficiency of these modes is low, they have relatively high Q factors, which favor lasing. We propose a new 2D photonic-crystal design that is capable of reversing this mode competition and achieving lasing on the radiative modes instead. Previously, this has only been shown in 1D structures, where the central idea is to introduce anisotropy into the system, both at unit-cell and resonator scales. By applying this concept to 2D photonic-crystal patterned terahertz frequency quantum cascade lasers, surface-emitting devices with diffraction-limited beams are demonstrated, with 17 mW peak output power.
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182
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Ding L, Wu JP, Xu G, Zhu B, Zeng QM, Li DF, Lu W. Lentiviral-mediated RNAi targeting caspase-3 inhibits apoptosis induced by serum deprivation in rat endplate chondrocytes in vitro. ACTA ACUST UNITED AC 2014; 47:445-51. [PMID: 24878605 PMCID: PMC4086170 DOI: 10.1590/1414-431x20143198] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2013] [Accepted: 02/20/2014] [Indexed: 01/27/2023]
Abstract
Current studies find that degenerated cartilage endplates (CEP) of vertebrae, with
fewer diffusion areas, decrease nutrient supply and accelerate intervertebral disc
degeneration. Many more apoptotic cells have been identified in degenerated than in
normal endplates, and may be responsible for the degenerated grade. Previous findings
suggest that inhibition of apoptosis is one possible approach to improve disc
regeneration. It is postulated that inhibition of CEP cell apoptosis may be
responsible for the regeneration of endplates. Caspase-3, involved in the execution
phase of apoptosis, is a candidate for regulating the apoptotic process. In the
present study, CEP cells were incubated in 1% fetal bovine serum. Activated caspases
were detected to identify the apoptotic pathway, and apoptosis was quantified by flow
cytometry. Lentiviral caspase-3 short hairpin RNA (shRNA) was employed to study its
protective effects against serum deprivation. Silencing of caspase-3 expression was
quantified by reverse transcription-polymerase chain reaction and Western blots, and
inhibition of apoptosis was quantified by flow cytometry. Serum deprivation increased
apoptosis of rat CEP cells through activation of a caspase cascade. Lentiviral
caspase-3 shRNA was successfully transduced into CEP cells, and specifically silenced
endogenous caspase-3 expression. Surviving cells were protected by the downregulation
of caspase-3 expression and activation. Thus, lentiviral caspase-3 shRNA-mediated
RNAi successfully silenced endogenous caspase-3 expression, preventing inappropriate
or premature apoptosis.
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Affiliation(s)
- L Ding
- Department of Orthopaedics, Jinshan Hospital, Fudan University, China
| | - J P Wu
- Department of Orthopaedics, Jinshan Hospital, Fudan University, China
| | - G Xu
- Center Laboratory, Jinshan Hospital, Fudan University, China
| | - B Zhu
- Department of Orthopaedics, Jinshan Hospital, Fudan University, China
| | - Q M Zeng
- Department of Orthopaedics, Jinshan Hospital, Fudan University, China
| | - D F Li
- Department of Orthopaedics, Jinshan Hospital, Fudan University, China
| | - W Lu
- Department of Orthopaedics, Jinshan Hospital, Fudan University, China
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183
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Andrews ES, Xu G, Rich SM. Microbial communities within field-collected Culiseta melanura and Coquillettidia perturbans. Med Vet Entomol 2014; 28:125-32. [PMID: 23781871 PMCID: PMC3784633 DOI: 10.1111/mve.12017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2012] [Revised: 02/28/2013] [Accepted: 04/04/2013] [Indexed: 05/03/2023]
Abstract
Although mosquitoes are well-known vectors of human and animal diseases, pathogens are only minor components of their total endogenous microbial communities. The midguts of many insects, including mosquitoes, contain diverse microbial communities. In this study, we used denaturing gradient gel electrophoresis to identify the diversity of bacteria in field-collected adult female Culiseta melanura (Diptera: Culicidae) (Coquillett) and Coquillettidia perturbans (Diptera: Culicidae) (Walker). Few significant differences in bacterial fauna between the two mosquito species were found, but the results suggest that host life history may be a determinant of the endogenous bacterial communities in mosquitoes. In the present study, the dominant bacteria are frequently identified as major components of other mosquito species' microbial flora, suggesting the establishment of a stable association between the mosquitoes and the microbes after initial acquisition from the environment.
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Affiliation(s)
- E S Andrews
- Laboratory of Medical Zoology, Department of Microbiology, University of Massachusetts, Amherst, MA, U.S.A
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184
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Xu G, Fu X, Du C, Ma J, Li Z, Ma X. Biomechanical effects of vertebroplasty on thoracolumbar burst fracture with transpedicular fixation: a finite element model analysis. Orthop Traumatol Surg Res 2014; 100:379-83. [PMID: 24835003 DOI: 10.1016/j.otsr.2014.03.016] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [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: 04/10/2013] [Revised: 12/17/2013] [Accepted: 03/13/2014] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To investigate the biomechanical effects of augmentation of the fractured vertebrae after posterior instrumentation. METHODS By simulating internal fixation plus augmentation with cement, eight tridimensional, anatomically detailed finite element models of the T11-L1 functional spinal junction were developed. Two kinds of models for mimicking different severity of the fracture were established according to the Denis' classification. Augmentation with cement was conducted after reduction with posterior fixation using a universal spine system. These models assumed a three-column loading configuration as follows: compression, anteflexion, extension, lateroflexion and axial rotation. Stress of the implants and spine was evaluated. RESULTS Data showed that for severely fractured models, augmentation apparently decreased the von Mises stresses by 50% for the rods and 40% for the screws, about 40% for the inferior endplate of T11, and 50% for the superior endplate of L1 in vertical compression and other load situations. CONCLUSION We should only apply vertebroplasty to prevent correction loss and implants failure based on the fact that it could significantly decrease stress of the instrumentations and spine when the vertebrae are severely fractured. LEVEL OF EVIDENCE Level IV, biomechanical study.
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Affiliation(s)
- G Xu
- Biomechanics Labs of Orthopaedic Institute, Tianjin Hospital, 406, Jiefang Nan Street, Hexi District, 300211 Tianjin, China
| | - X Fu
- Biomechanics Labs of Orthopaedic Institute, Tianjin Hospital, 406, Jiefang Nan Street, Hexi District, 300211 Tianjin, China
| | - C Du
- Department of Orthopaedics, Binzhou Medical University Hospital, 661 Yellow River Road, 256603 Binzhou, China
| | - J Ma
- Biomechanics Labs of Orthopaedic Institute, Tianjin Hospital, 406, Jiefang Nan Street, Hexi District, 300211 Tianjin, China
| | - Z Li
- Department of Orthopaedics, Tianjin Medical University General Hospital, 154 Anshan Street, Heping District, 300052 Tianjin, China; Department of Immunology, Tianjin Medical University, 22 Qixiangtai Road, Heping District, 300070 Tianjin, China
| | - X Ma
- Biomechanics Labs of Orthopaedic Institute, Tianjin Hospital, 406, Jiefang Nan Street, Hexi District, 300211 Tianjin, China.
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185
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Klingler C, Wolf M, Suhm T, Li J, Chen S, Zhao X, Schleicher E, Häring HU, Xu G, Lehmann R, Weigert C. Lysophosphatidylcholine als Regulatoren der Genexpression humaner Skelettmuskelzellen. DIABETOL STOFFWECHS 2014. [DOI: 10.1055/s-0034-1374897] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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186
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Xu G, Lan Y, He X. Pathogens of urinary system infection in patients with spinal cord disorders: Their distribution and treatment. Ann Phys Rehabil Med 2014. [DOI: 10.1016/j.rehab.2014.03.850] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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187
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Xiao F, Yu Q, Li J, Johansson MEV, Singh AK, Xia W, Riederer B, Engelhardt R, Montrose M, Soleimani M, Tian DA, Xu G, Hansson GC, Seidler U. Slc26a3 deficiency is associated with loss of colonic HCO3 (-) secretion, absence of a firm mucus layer and barrier impairment in mice. Acta Physiol (Oxf) 2014; 211:161-75. [PMID: 24373192 DOI: 10.1111/apha.12220] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [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: 09/05/2013] [Revised: 11/08/2013] [Accepted: 12/17/2013] [Indexed: 12/11/2022]
Abstract
AIM Downregulated in adenoma (DRA, Slc26a3) is a member of the solute carrier family 26 (SLC26), family of anion transporters, which is mutated in familial chloride-losing diarrhoea (CLD). Besides Cl(-) -rich diarrhoea, CLD patients also have a higher-than-average incidence of intestinal inflammation. In a search for potential explanations for this clinical finding, we investigated colonic electrolyte transport, the mucus layer and susceptibility against dextran sodium sulphate (DSS)-induced colitis in Slc26a3(-/-) mice. METHODS HCO3 (-) secretory (JHCO3 (-) ) and fluid absorptive rates were measured by single-pass perfusion in vivo and in isolated mid-distal colonic mucosa in Ussing chambers in vitro. Colonocyte intracellular pH (pHi ) was assessed fluorometrically, the mucus layer by immunohistochemistry and colitis susceptibility by the addition of DSS to the drinking water. RESULTS HCO3 (-) secretory (JHCO3- ) and fluid absorptive rates were strongly reduced in Slc26a3(-/-) mice compared to wild-type (WT) littermates. Despite an increase in sodium/hydrogen exchanger 3 (NHE3) mRNA and protein expression, and intact acid-activation of NHE3, the high colonocyte pH in Slc26a3(-/-) mice prevented Na(+) /H(+) exchange-mediated fluid absorption in vivo. Mucin 2 (MUC2) immunohistochemistry revealed the absence of a firm mucus layer, implying that alkaline secretion and/or an absorptive flux may be necessary for optimal mucus gel formation. Slc26a3(-/-) mice were highly susceptible to DSS damage. CONCLUSIONS Deletion of DRA results in severely reduced colonic HCO3 (-) secretory rate, a loss of colonic fluid absorption, a lack of a firmly adherent mucus layer and a severely reduced colonic mucosal resistance to DSS damage. These data provide potential pathophysiological explanations for the increased susceptibility of CLD patients to intestinal inflammation.
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Affiliation(s)
- F. Xiao
- Department of Gastroenterology; Hannover Medical School; Hannover Germany
- Department of Gastroenterology; Tongji Hospital; Huazhong University of Science & Technology; Wuhan China
| | - Q. Yu
- Department of Gastroenterology; Hannover Medical School; Hannover Germany
- Department of Gastroenterology; Tongji Hospital; Huazhong University of Science & Technology; Wuhan China
| | - J. Li
- Department of Gastroenterology; Hannover Medical School; Hannover Germany
- Department of Nephrology; Tongji Hospital; Huazhong University of Science & Technology; Wuhan China
| | - M. E. V. Johansson
- Department of Medical Biochemistry; University of Gothenburg; Gothenburg Sweden
| | - A. K. Singh
- Department of Gastroenterology; Hannover Medical School; Hannover Germany
| | - W. Xia
- Department of Gastroenterology; Hannover Medical School; Hannover Germany
- School of Medicine; Key Lab of Combined Multiorgan Transplantation; The First Affiliated Hospital; Zhejiang University; Hangzhou China
| | - B. Riederer
- Department of Gastroenterology; Hannover Medical School; Hannover Germany
| | - R. Engelhardt
- Department of Gastroenterology; Hannover Medical School; Hannover Germany
| | - M. Montrose
- Center on Genetics of Transport and Epithelial Biology; University of Cincinnati; Cincinnati OH USA
| | - M. Soleimani
- Center on Genetics of Transport and Epithelial Biology; University of Cincinnati; Cincinnati OH USA
| | - D. A Tian
- Department of Gastroenterology; Tongji Hospital; Huazhong University of Science & Technology; Wuhan China
| | - G. Xu
- Department of Nephrology; Tongji Hospital; Huazhong University of Science & Technology; Wuhan China
| | - G. C. Hansson
- Department of Medical Biochemistry; University of Gothenburg; Gothenburg Sweden
| | - U. Seidler
- Department of Gastroenterology; Hannover Medical School; Hannover Germany
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188
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Xu G, He X. Neural mechanism of the spatial orienting in the posterior parietal cortex in live mouse: Two-photon brain imaging study. Ann Phys Rehabil Med 2014. [DOI: 10.1016/j.rehab.2014.03.1586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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189
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Guan Y, Cui L, Qu Z, Lu L, Wang F, Wu Y, Zhang J, Gao F, Tian H, Xu L, Xu G, Li W, Jin Y, Xu GT. Subretinal transplantation of rat MSCs and erythropoietin gene modified rat MSCs for protecting and rescuing degenerative retina in rats. Curr Mol Med 2014; 13:1419-31. [PMID: 23971737 DOI: 10.2174/15665240113139990071] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2011] [Revised: 10/06/2011] [Accepted: 06/10/2013] [Indexed: 12/18/2022]
Abstract
For degenerative retinal diseases, like the acquired form exemplified by age-related macular degeneration (AMD), there is currently no cure. This study was to explore a stem cell therapy and a stem cell based gene therapy for sodium iodate (SI)-induced retinal degeneration in rats. Three cell types, i.e., rat mesenchymal stem cells (rMSCs) alone, erythropoietin (EPO) gene modified rMSCs (EPO-rMSCs) or doxycycline (DOX) inducible EPO expression rMSCs (Tet-on EPO-rMSCs), were transplanted into the subretinal spaces of SI-treated rats. The rMSCs were prepared for transplantation after 3 to 5 passages or modified with EPO gene. During the 8 weeks after the transplantation, the rats treated with rMSCs alone or with two types of EPO-rMSCs were all monitored with fundus examination, fundus fluorescein angiography (FFA) and electroretinogram. The transplantation efficiency of donor cells was examined for their survival, integration and differentiation. Following the transplantation, labeled donor cells were observed in subretinal space and adopted RPE morphology. EPO concentration in vitreous and retina of SI-treated rats which were transplanted with EPO-rMSCs or Tet-on EPO-rMSCs was markedly increased, in parallel with the improvement of retinal morphology and function. These findings suggest that rMSCs transplantation could be a new therapy for degenerative retinal diseases since it can protect and rescue RPE and retinal neurons, while EPO gene modification to rMSCs could be an even better option.
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Affiliation(s)
- Y Guan
- Department of Ophthalmology, Drexel University College of Medicine, 219 North Broad Street 3FL, Philadelphia, PA 19107, USA.
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Abstract
This article aimed to investigate the value of α-fetoprotein (AFP) for the diagnosis of hepatocellular carcinoma (HCC) and to evaluate the relationship between AFP and various clinical variables of HCC comprehensively. A retrospective study of postoperative patients diagnosed with liver neoplasm from two Chinese centers was enrolled in our study.A total of 3050 patients were included. The best cut-off point of AFP for the diagnosis of HCC was 20ng/ml with ideal sensitivity (69.74%), specificity (91.18%), LR (4.12) and YI (0.61). Non-HBV infection patients showed the highest specificity (94.44%) but lowest sensitivity (60.13%). In HBV infection. Patients, HBsAg, HBeAb, and HBcAb positive patients had the highest sensitivity (79.55%) and specificity (58.49%). AFP levels increased significantly in symptomatic patients (p=0.011). Those patients with tumor sizes ≥10cm had much higher serum AFP level compared with smaller tumors ones (p=0.014). AFP levels increased remarkably in patients with vascular invasion (p=0.015). Stepwise logistic regression showed tumor size (≥10cm) was an independent predictor of elevated AFP (OR=2.743, 95%CI: 1.167-6.447, P=0.021). The best discriminating AFP value for the diagnosis of HCC is 20ng/ml; HBsAg, HBeAb and HBcAb positive patients have the optimal sensitivity and specificity; tumor size ≥ 10cm is an independent predictor of elevated AFP.
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192
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Cao C, Luo J, Gao L, Xu G, Yi J, Huang X, Li S, Xiao J, Liu S, Xu Z. Primary Radiation Therapy Compared With Primary Surgery in Cervical Esophageal Cancer. Int J Radiat Oncol Biol Phys 2014. [DOI: 10.1016/j.ijrobp.2013.11.078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Ma RCW, So WY, Tam CHT, Luk AO, Ho JSK, Wang Y, Lam VK, Lee HM, Kong AP, Tong PC, Xu G, Chow CC, Ng MC, Yang XL, Chan JC. Genetic variants for type 2 diabetes and new-onset cancer in Chinese with type 2 diabetes. Diabetes Res Clin Pract 2014; 103:328-37. [PMID: 24468095 DOI: 10.1016/j.diabres.2013.12.016] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/11/2013] [Revised: 10/24/2013] [Accepted: 12/18/2013] [Indexed: 12/19/2022]
Abstract
BACKGROUND Diabetes is associated with an increased risk of cancer. This study aimed to evaluate associations between recently reported type 2 diabetes (T2D) susceptibility genetic variants and cancer risk in a prospective cohort of Chinese patients with T2D. METHODS Seven single nucleotide polymorphisms (SNP) in IGF2BP2, CDKAL1, SLC30A8, CDKN2A/B, HHEX and TCF7L2, all identified from genome-wide association studies of T2D, were genotyped in 5900 T2D patients [age mean ± SD = 57 ± 13 years, % males = 46] without any known cancer at baseline. Associations between new-onset of cancer and SNPs were tested by Cox proportional hazard models with adjustment of conventional risk factors. RESULTS During the mean follow-up period of 8.5 ± 3.3 years, 429 patients (7.3%) developed cancer. Of the T2D-related SNPs, the G-alleles of HHEX rs7923837 (hazard ratio [HR] (95% C.I.) = 1.34 (1.08-1.65); P = 6.7 ×10(-3) under dominant model) and TCF7L2 rs290481 (HR (95% C.I.) = 1.16 (1.01-1.33); P = 0.040 under additive model) were positively associated with cancer risk, while the G-allele of CDKAL1 rs7756992 was inversely associated (HR (95% C.I.) = 0.80 (0.65-1.00); P = 0.048 under recessive model). The risk alleles of these significant SNPs exhibited combined effect on increasing cancer risk (per-allele HR (95% C.I.) = 1.25 (1.12-1.39); P = 4.8 × 10(-5)). The adjusted cancer risk was 2.41 (95% C.I. 1.23-4.69) for patients with four risk alleles comparing to patients without risk allele. CONCLUSIONS T2D-related variants HHEX rs7923837, TCF7L2 rs290481 and CDKAL1 rs7756992 increased cancer risk in patients with diabetes. IMPACT Our findings provide novel insights into the pathogenesis of cancer in diabetes.
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Affiliation(s)
- R C W Ma
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong; Hong Kong Institute of Diabetes and Obesity, Chinese University of Hong Kong, Hong Kong; Lee Ka Shing Institute of Health Sciences, Chinese University of Hong Kong, Hong Kong.
| | - W Y So
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong.
| | - C H T Tam
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong
| | - A O Luk
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong
| | - J S K Ho
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong
| | - Y Wang
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong
| | - V K Lam
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong
| | - H M Lee
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong
| | - A P Kong
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong
| | - P C Tong
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong
| | - G Xu
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong; Hong Kong Institute of Diabetes and Obesity, Chinese University of Hong Kong, Hong Kong; Lee Ka Shing Institute of Health Sciences, Chinese University of Hong Kong, Hong Kong
| | - C C Chow
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong
| | - M C Ng
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong
| | - X L Yang
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong
| | - J C Chan
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Prince of Wales Hospital, Shatin, New Territories, Hong Kong; Hong Kong Institute of Diabetes and Obesity, Chinese University of Hong Kong, Hong Kong; Lee Ka Shing Institute of Health Sciences, Chinese University of Hong Kong, Hong Kong
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194
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Wan D, Gu W, Xu G, Shen C, Ding D, Shen S, Wang S, Gong X, He S, Zhi Q. Effects of common polymorphisms rs2910164 in miR-146a and rs11614913 in miR-196a2 on susceptibility to colorectal cancer: a systematic review meta-analysis. Clin Transl Oncol 2014; 16:792-800. [PMID: 24399071 DOI: 10.1007/s12094-013-1150-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2013] [Accepted: 12/09/2013] [Indexed: 01/29/2023]
Abstract
PURPOSE Emerging evidence has shown that single nucleotide polymorphisms occurred in microRNAs may contribute to the development of colorectal cancer (CRC). rs2910164 in miR-146a and rs11614913 in miR-196a2 are suggested to be associated with the susceptibility to CRC, but individually published studies revealed inconclusive results. To systematically summarize the possible correlationship between these polymorphisms and CRC risk, we performed this meta-analysis. METHODS We retrieved the relevant articles of the associations between these two microRNA polymorphisms and susceptibility to CRC for the period up to July 1, 2013. A total of seven articles were identified with 2,143 cases and 2,457 controls for miR-146a rs2910164, 1,594 cases and 2,252 controls for miR-196a2 rs11614913. Odds ratio and 95 % confidence interval were calculated to investigate the strength of the association. RESULTS The pooled analysis showed that miR-146a rs2910164 did not reveal any correlation with CRC susceptibility. However, a decreased risk was observed between miR-196a2 rs11614913 and CRC in all genetic models. CONCLUSION Our current meta-analysis demonstrates that miR-196a2 rs11614913 most likely contributes to decreased risk of CRC, whereas miR-146a rs2910164 may not be associated with the susceptibility to CRC.
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Affiliation(s)
- D Wan
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, 510006, Guangdong, China
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195
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Xu SP, Xu G, Pei Y, Zhu HL. Microwave solid phase synthesis, characterization, and antimicrobial activities of one mononuclear manganese(II) complex with 4-chlorobenzoic acid 4-[3-(4-chlorophenyl)-3-hydroxyacryloyl]-3-hydroxyphenyl ester. RUSS J COORD CHEM+ 2014. [DOI: 10.1134/s1070328414010084] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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196
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Tao R, Sun TJ, Han YQ, Xu G, Liu J, Han YF. Optimization of in vitro cell labeling methods for human umbilical cord-derived mesenchymal stem cells. Eur Rev Med Pharmacol Sci 2014; 18:1127-1134. [PMID: 24817285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
BACKGROUND AND OBJECTIVES Human umbilical cord-derived mesenchymal stem cells (hUCMSCs) are a novel source of seed cells for cell therapy and tissue engineering. However, in vitro labeling methods for hUCMSCs need to be optimized for better detection of transplanted cells. AIM OF THE STUDY To identify the most stable and efficient method for labeling hUCMSCs in vitro. MATERIALS AND METHODS hUCMSCs were isolated using a modified enzymatic digestion procedure and cultured. hUCMSCs of passage three (P3) were then labeled with BrdU, PKH26, or lentivirus-GFP and passaged further. Cells from the first labeled passage (LP1), the fourth labeled passage (LP4) and later passages were observed using a fluorescence microscope. The differentiation potential of LP4 cells was assessed by induction with adipogenic and osteogenic medium. Flow cytometry was used to measure the percentage of labeled cells and the percentage of apoptotic or dead cells. The labeling efficiencies of the three hUCMSC-labeling methods were compared in vitro. RESULTS BrdU, PKH26, and lentivirus-GFP all labeled LP1 cells with high intensity and clarity. However, the BrdU labeling of the LP4 cells was vague and not localized to the cell nuclei; LP9 cells were not detected under a fluorescence microscope. There was also a significant decrease in the fluorescence intensity of PKH26-labeled LP4 cells, and LP11 cells were not detected under a fluorescence microscope. However, the fluorescence of LP4 cells labeled with lentivirus-GFP remained strong, and cells labeled with lentivirus-GFP were detected up to LP14 under a fluorescence microscope. Statistical analyses indicated that percentages of LP1 cells labeled with PKH26 and lentivirus-GFP were significantly higher than that of cells labeled with BrdU (p < 0.05), and that the LP4 cells were more efficiently labeled with lentivirus-GFP than with PKH26 or BrdU (p < 0.05). BrdU-, PKH26-, and lentivirus-GFP labeled LP4 cells were all differentiated to adipocytes or osteoblasts with adipogenic and osteogenic medium. No statistical significance (p > 0.05) was observed between the death rates of labeled and unlabeled cells. CONCLUSIONS Lentivirus-GFP is a valid method for long-term in vitro labeling, and it may be used as a long-term hUCMSC tracker following transplantation in vivo.
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Affiliation(s)
- R Tao
- Department of Plastic Surgery, PLA General Hospital, Beijing, People's Republic of China.
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197
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Sun TJ, Tao R, Han YQ, Xu G, Liu J, Han YF. Therapeutic potential of umbilical cord mesenchymal stem cells with Wnt/β-catenin signaling pathway pre-activated for the treatment of diabetic wounds. Eur Rev Med Pharmacol Sci 2014; 18:2460-2464. [PMID: 25268090] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The pathogenesis of diabetes mellitus wounds is complicate, and there lacks effective treatment strategies. Mesenchymal stem cells can promote wound healing. Compared with bone marrow mesenchymal stem cells, umbilical cord mesenchymal stem cells have obvious advantages in biological property. Wnts are potent regulatory molecules for stem cell turnover and skin regeneration, while Wnt signaling is not well activated in diabetic wounds. Umbilical cord mesenchymal stem cells with Wnt/β-catenin signaling pathway pre-activated have some potential in the treatment of diabetic wounds. In this paper, we review the research status as well as problems in this field.
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Affiliation(s)
- T-J Sun
- Department of Burn and Plastic Surgery, Burns Institute, The First Affiliated Hospital of PLA General Hospital, Beijing, People's Republic of China.
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198
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Tao R, Sun TJ, Han YQ, Xu G, Liu J, Han YF. Epimorphin-induced differentiation of human umbilical cord mesenchymal stem cells into sweat gland cells. Eur Rev Med Pharmacol Sci 2014; 18:1404-1410. [PMID: 24867521] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
OBJECTIVES Mesenchymal stem cells (MSCs) have the potential for multi-directional differentiation and can be induced to differentiate into sweat gland cells under certain conditions. Epimorphin (EPM) plays an important role in the promotion of epithelial cell morphogenesis; however, its effect on sweat gland-cell differentiation of MSCs remains unknown. The purpose of this study was to investigate how EPM regulates sweat gland cell differentiation of human umbilical cord mesenchymal stem cells (hUCMSCs). MATERIALS AND METHODS hUCMSCs were labeled with 5-bromo-2-deoxyuridine (BrdU) before differentiation induction; were cultured in common culture medium, conditioned medium, or EPM-conditioned medium; and then induced to differentiate into sweat gland cells. Five days after induction, the expression rates of the sweat gland-cell antigens cytokeratin 14 (CK14), cytokeratin 19 (CK19), and carcinoembryonic antigen (CEA) in hUCMSCs were detected by flow cytometry, and the messenger ribonucleic acid (mRNA) and protein levels of CK14, CK19, and CEA were determined by reverse transcription polymerase chain reaction (RT-PCR) and western blot, respectively. RESULTS hUCMSCs can be induced to differentiate into sweat gland cells in conditioned medium, and expression of CEA was detected by immunofluorescence assay. Flow cytometry results showed that the expression rate of the sweat gland-cell antigens CK14, CK19, and CEA in the conditioned medium were significantly lower than that in the EPM conditioned medium (p < 0.05). RT-PCR and western blot results showed that the mRNA and protein levels of CK14, CK19, and CEA in the conditioned medium were all significantly lower than that in the EPM-conditioned medium (p < 0.01). CONCLUSIONS These results suggest that EPM can effectively induce the differentiation of hUCMSCs into sweat gland cells.
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Affiliation(s)
- R Tao
- Department of Plastic Surgery, PLA General Hospital, Beijing, People's Republic of China.
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199
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Xu G, Jiang HW, Fang J, Wen H, Gu B, Liu J, Zhang LM, Ding Q, Zhang YF. An improved dosage regimen of sertraline hydrochloride in the treatment for premature ejaculation: an 8-week, single-blind, randomized controlled study followed by a 4-week, open-label extension study. J Clin Pharm Ther 2013; 39:84-90. [PMID: 24313633 DOI: 10.1111/jcpt.12115] [Citation(s) in RCA: 8] [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: 07/19/2012] [Accepted: 11/04/2013] [Indexed: 01/23/2023]
Abstract
WHAT IS KNOWN AND OBJECTIVE This study aimed at evaluating the safety and efficacy of an improved dosage regimen of sertraline in patients with premature ejaculation (PE) and to examine whether the premature ejaculation diagnostic tool (PEDT) can be used as a measure of treatment response in these patients. METHODS A total of 218 PE patients were randomized into control (n = 61) and treatment (n = 157) groups to receive mycelium of cordyceps sinensis C4 and sertraline 50 mg daily for 8 weeks, respectively. Following this blinded stage, sixty-three patients chose to take sertraline 100 mg daily for an additional 4-week period, and 80 other patients continued treatment with sertraline 50 mg. Main outcome measures include intravaginal ejaculatory latency time (IELT), PEDT score and Clinical Global Impression of Change (CGIC) score. RESULTS At weeks 4 and 8, mean IELT of patients who subsequently chose to take 100 mg of sertraline was significantly lower than that of patients who continued taking 50 mg of sertraline, although the IELT value was comparable between the two groups of patients at baseline. However, with an additional 4-week treatment, the mean IELT increased significantly more in the 100-mg group than in the 50-mg continuation group. Similar results were also obtained in the analyses of the PEDT and CGIC scores. Both regimens were well tolerated, and relapse rate did not differ significantly between the two groups. WHAT IS NEW AND CONCLUSION These findings suggest that PE patients not responding to an 8-week treatment with sertraline 50 mg can benefit from an additional 4-week treatment with sertraline 100 mg and that the PEDT may be a valid measure of treatment response in PE patients.
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Affiliation(s)
- G Xu
- Department of Urologic Surgery, Huashan Hospital Affiliated to Fudan University, Shanghai, China
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200
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Lan Y, Xu G, Dou Z, Wan G, Yu F, Lin T. Biomechanical changes in the pharynx and upper esophageal sphincter after modified balloon dilatation in brainstem stroke patients with dysphagia. Neurogastroenterol Motil 2013; 25:e821-9. [PMID: 23941282 DOI: 10.1111/nmo.12209] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2013] [Accepted: 07/20/2013] [Indexed: 01/24/2023]
Abstract
BACKGROUND Few studies have investigated the biomechanical changes in the upper esophageal sphincter (UES) and pharyngeal function after successful dilatation therapy for dysphagia. Using high-resolution manometry (HRM), we examined the biomechanical properties of swallowing in brainstem stroke patients with dysphagia following modified balloon dilation therapy. METHODS 30 brainstem stroke patients with dysphagia were included. Patients in the experimental group received 3 weeks of modified balloon dilatation treatment and regular dysphagia therapy. Patients in the control group received 3 weeks of regular dysphagia therapy only. Efficacy of treatment was evaluated before and following intervention. Functional oral intake was measured using the Functional Oral Intake Scale (FOIS). Pharyngeal maximum pressures and duration, UES residual pressure and duration during swallowing were measured using HRM. KEY RESULTS In the experimental group, the feeding tube was able to be removed in 12 of 15 patients, vs 2 of 15 patients in the control group. The experimental group had 4-point median improvement, while control groups only had 1-point improvement in FOIS scores. In the experimental group, posttreatment UES relaxation and pharyngeal propulsion were both significantly improved for the three materials (p < 0.05) and UES resting pressure approximated normal. In the control group, pharyngeal propulsion was improved for water and thick liquids (p < 0.05) but not for paste material; there was no improvement in posttreatment UES relaxation for all three materials (p > 0.05). CONCLUSIONS & INFERENCES Dysphagia therapy with modified dilatation improved UES relaxation, strengthened pharyngeal propulsion, restored UES resting pressure and improved functional oral intake to a greater extent than regular therapy alone.
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Affiliation(s)
- Y Lan
- Department of Rehabilitation Medicine, The Third Affiliated Hospital, Sun Yat-sen University, Guangzhou, China
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