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Deng LH, Wang ZP. [The prevalence of common complications among pneumoconiosis patients: a systematic review and Meta-analysis]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2023; 41:931-938. [PMID: 38195231 DOI: 10.3760/cma.j.cn121094-20230118-00018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/11/2024]
Abstract
Objective: To analysis the main types and prevalences of complications among pneumoconiosis patients, and to provide scientific basis for the prevention and treatment of pneumoconiosis. Methods: In January 2023, literatures on pneumoconiosis complications published before December 31, 2022 in China National Knowledge Infrastructure (CNKI), Wanfang Database, Chinese Science & Technology Journal Database (VIP), PubMed and Web of Science were systematically searched. Literatures were selected according to inclusion and exclusion criteria, and relevant data were extracted. Quality assessment tool was used to evaluate the quality of the articles for this study. The combined prevalence of complications among pneumoconiosis patients was calculated by R 4.1.1 software. Subgroup analysis was carried out to explore the origin of heterogeneity. Results: Sixty-four eligible articles were selected from 2276 literatures related to pneumoconiosis and its complications. The combined prevalence of complications among pneumoconiosis patients was 21.1% (95% CI: 16.0%-26.3%, I(2)=99.9%). The combined prevalence of chronic obstructive pulmonary disease (COPD) was 26.4% (95%CI: 17.3%-35.6%, I(2)=97.1%), which was the highest among different types of complications among pneumoconiosis patients. Subgroup analyses revealed that the combined prevalence of tuberculosis among pneumoconiosis stage Ⅰ, Ⅱand Ⅲ were 13.8% (95%CI: 10.5%-17.2%, I(2)=99.6%), 18.4% (95% CI: 14.9%-22.0%, I(2)=99.3%) and 37.3% (95% CI: 30.7%-44.0%, I(2)=99.1%), respectively, showing a corresponding increasing tendency (P<0.05). The combined prevalence of tuberculosis among coal worker's pneumoconiosis patients was 12.9% (95% CI: 6.4%-19.3%, I(2)=97.9%), while the combined prevalence of tuberculosis among silicosis patients was 13.9% (95%CI: 10.0%-17.8%, I(2)=96.9%) . Conclusion: The prevalence of pneumoconiosis patients combined with different types of complications is high, and its prevalence increases with the severity of pneumoconiosis.
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Affiliation(s)
- L H Deng
- Journal of Preventive Medicine, Tianjin Center for Disease Control and Prevention, Tianjin 300011, China
| | - Z P Wang
- Department of Epidemiology and Biostatistics, Key Laboratory of Molecular Cancer Epidemiology, Tianjin, National Clinical Research Center for Cancer, Tianjin Medical University Cancer Institute and Hospital, Tianjin Medical University, Tianjin 300060, China Organ Transplantation Center, Tianjin First Central Hospital, Tianjin 300192, China
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Wang ZP, Jing H, Teng YX, Huang Y, Chacha CHACHA, Liu YZ, Zhang BY, Shen Y, Li Q, Mi BB, Yang JM, Yan H, Dang SN. [Association between muscle mass and quality of life in Shaanxi adults]. Zhonghua Liu Xing Bing Xue Za Zhi 2023; 44:877-884. [PMID: 37380407 DOI: 10.3760/cma.j.cn112338-20220917-00786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Subscribe] [Scholar Register] [Indexed: 06/30/2023]
Abstract
Objective: To investigate the association between muscle mass and quality of life in adults in Shaanxi adults. Methods: The data in this analysis were part of the baseline survey of the Regional Ethnic Cohort Study in Northwest China from June 2018 to May 2019 in Shaanxi Province. The participants' quality of life, including physical component summary (PCS) and mental component summary (MCS), was assessed by the 12-Item Short Form Survey, and the Body Fat Determination System measured muscle mass. A logistic regression model with adjustment for confounding factors was established to analyze the association between muscle mass and quality of life in different genders. Further, sensitivity and subgroup analyses were conducted to explore its stability. Finally, a restricted cubic spline was employed to investigate the dose-response relationship between muscle mass and quality of life in different genders. Results: A total of 20 595 participants were included, with an average age of 55.0, and 33.4% were male. After controlling for potential confounders, compared with the Q1 group, the risk of low PCS was reduced by 20.6% (OR=0.794, 95%CI: 0.681-0.925) and the risk of low MCS was lower reduced by 20.1% (OR=0.799, 95%CI: 0.689-0.926) in female Q5 groups. Compared with the Q1 group, the risk of low PCS was reduced by 24.4% (OR=0.756, 95%CI: 0.644-0.888) in the male Q2 group. However, no significant association between muscle mass and MCS in males has been found. In females, restricted cubic spline analysis showed a significant linear dose-response relationship between muscle mass and PCS and MCS. Conclusions: There is a positive association between muscle mass and quality of life in Shaanxi adults, especially females. With the increase in muscle mass, the physical and mental functions of the population continue to improve.
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Affiliation(s)
- Z P Wang
- Department of Epidemiology and Biostatistics, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China
| | - H Jing
- Department of Epidemiology and Biostatistics, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China
| | - Y X Teng
- Department of Epidemiology and Biostatistics, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China
| | - Y Huang
- Department of Epidemiology and Biostatistics, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China
| | - C H A C H A Chacha
- Department of Epidemiology and Biostatistics, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China
| | - Y Z Liu
- Department of Epidemiology and Biostatistics, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China
| | - B Y Zhang
- Department of Epidemiology and Biostatistics, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China
| | - Y Shen
- Department of Epidemiology and Biostatistics, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China
| | - Q Li
- Department of Epidemiology and Biostatistics, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China
| | - B B Mi
- Department of Epidemiology and Biostatistics, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China
| | - J M Yang
- Department of Epidemiology and Biostatistics, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China
| | - H Yan
- Department of Epidemiology and Biostatistics, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China
| | - S N Dang
- Department of Epidemiology and Biostatistics, School of Public Health, Xi'an Jiaotong University Health Science Center, Xi'an 710061, China
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Ding GP, Zhang J, Wang ZP, Yang Y, Zhu YC, Lin J, Tian Y. [Clinical analysis of fifteen transplant ureteral stricture cases]. Zhonghua Yi Xue Za Zhi 2023; 103:1568-1570. [PMID: 37246008 DOI: 10.3760/cma.j.cn112137-20230109-00046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
This research aims to explore the clinical characteristics and treatment of transplant ureteral strictures. We retrospectively analyzed the clinical data from fifteen patients diagnosed with transplant ureteral stricture. Of the fifteen patients, five underwent regular ureteral stent or nephrostomy tube exchanges, while ten underwent open surgery. There were no significant differences in basic clinical characteristics between the two groups. The median follow-up time for regular ureteral stent or nephrostomy tube exchanges and open surgery group was 36.8 (11.8-56.0) months and 25.0 (4.5-31.2) months, respectively. Among patients who underwent regular exchanges, one required regular dialysis. Nine patients in the open surgery group had successful removal of the ureteral stent. Our findings suggest that regular ureteral stent or nephrostomy tube exchanges, as well as open surgery, are effective treatment options for transplant ureteral strictures.
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Affiliation(s)
- G P Ding
- Department of Urology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - J Zhang
- Department of Urology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Z P Wang
- Department of Urology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Y Yang
- Department of Urology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Y C Zhu
- Department of Urology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - J Lin
- Department of Urology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
| | - Y Tian
- Department of Urology, Beijing Friendship Hospital, Capital Medical University, Beijing 100050, China
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Cao YY, Sun T, Wang ZP, Lei F, Lin LJ, Zhang XY, Song XH, Zhang XJ, Zhang P, She ZG, Cai JJ, Yang SJ, Jia P, Li J, Li HL. Association between one-year exposure to air pollution and the prevalence of pulmonary nodules in China. J Breath Res 2023; 17. [PMID: 37040740 DOI: 10.1088/1752-7163/accbe4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 04/11/2023] [Indexed: 04/13/2023]
Abstract
BACKGROUND PM2.5 is a well-known airborne hazard to cause various diseases. Evidence suggests that air pollution exposure contributes to the occurrence of pulmonary nodules. Pulmonary nodules detected on the CT scans can be malignant or progress to malignant during follow-up. But the evidence of the association between PM2.5 exposure and pulmonary nodules was limited. 
Objective: To examine potential associations of exposures to PM2.5 and its major chemical constituents with the prevalence of pulmonary nodules.
Methods: 16865 participants were investigated from eight physical examination centers in China from 2014 to 2017. The daily concentrations of PM2.5 and its five components were estimated by high-resolution and high-quality spatiotemporal datasets of ground-level air pollutants in China. The logistic regression and the quantile-based g-computation models were used to assess the single and mixture impact of air pollutant PM2.5 and its components on the risk of pulmonary nodules, respectively. 
Results: Each 1mg/m3 increase in PM2.5 (OR 1.011 (95%CI: 1.007-1.014)) was positively associated with pulmonary nodules. Among five PM2.5 components, in single-pollutant effect models, every 1 μg/m3 increase in OM, BC, and NO3- elevated the risk of pulmonary nodule prevalence by 1.040 (95%CI: 1.025-1.055), 1.314 (95%CI: 1.209-1.407) and 1.021 (95%CI: 1.007-1.035) fold, respectively. In mixture-pollutant effect models, the joint effect of every quintile increase in PM2.5 components was 1.076 (95%CI: 1.023-1.133) fold. Notably, NO3- BC and OM contributed higher risks of pulmonary nodules than other PM2.5 components. And the NO3- particles were identified to have the highest contribution. The impacts of PM2.5 components on pulmonary nodules were consistent across gender and age.
Conclusion: These findings provide important evidence for the positive correlation between exposure to PM2.5 and pulmonary nodules in China and identify that NO3- particles have the highest contribution to the risk.
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Affiliation(s)
- Yuan Yuan Cao
- Institute of Model Animal, Wuhan University, No.115 Donghu Road, Wuhan, P.R. China, Wuhan, Hubei, 430072, CHINA
| | - Tao Sun
- Cardiology, Renmin Hospital of Wuhan University, 99 Zhangzhidong Rd, Wuhan, China, Wuhan, 430060, CHINA
| | - Zhan Peng Wang
- School of Resource and Environmental Sciences, Wuhan University, No.299 Bayi Road, Wuchang District, Wuhan City, Hubei Province, Wuhan, Hubei, 430072, CHINA
| | - Fang Lei
- School of Basic Medical Science, Wuhan University, No.299 Bayi Road, Wuchang District, Wuhan City, Hubei Province, Wuhan, Hubei, 430072, CHINA
| | - Li Jin Lin
- Cardiology, Renmin Hospital of Wuhan University, 99 Zhangzhidong Rd, Wuhan, China, Wuhan, Hubei, 430060, CHINA
| | - Xing Yuan Zhang
- School of Basic Medical Science, Wuhan University, No.299 Bayi Road, Wuchang District, Wuhan City, Hubei Province, Wuhan, Hubei, 430072, CHINA
| | - Xiao Hui Song
- Cardiology, Renmin Hospital of Wuhan University, 99 Zhangzhidong Rd, Wuhan, China, Wuhan, 430060, CHINA
| | - Xiao Jing Zhang
- School of Basic Medical Science, Wuhan University, No.299 Bayi Road, Wuchang District, Wuhan City, Hubei Province, Wuhan, Hubei, 430072, CHINA
| | - Peng Zhang
- School of Basic Medical Science, Wuhan University, No.299 Bayi Road, Wuchang District, Wuhan City, Hubei Province, Wuhan, Hubei, 430072, CHINA
| | - Zhi Gang She
- Cardiology, Renmin Hospital of Wuhan University, 99 Zhangzhidong Rd, Wuhan, China, Wuhan, 430060, CHINA
| | - Jing Jing Cai
- Department of Cardiology, The Third Xiangya Hospital, Central South University, NO.87 Xiangya Road, Changsha City, Changsha, Hunan, 410083, CHINA
| | - Shu Juan Yang
- West China School of Public Health and West China Fourth Hospital, Sichuan University, No.16, Section 3, Renmin South Road, Chengdu City, Chengdu, Sichuan, 610065, CHINA
| | - Peng Jia
- School of Resource and Environmental Sciences, Wuhan University, No.299 Bayi Road, Wuchang District, Wuhan City, Hubei Province, Wuhan, Hubei, 430072, CHINA
| | - Jian Li
- Thoracic and cardiovascular surgery, Huanggang central Hospital, Yangtze University, No.11 Kaopeng Street, Huangzhou District, Huanggang City, Hubei Province, Jingzhou, Hubei, 434023, CHINA
| | - Hong Liang Li
- Cardiology, Renmin Hospital of Wuhan University, 99 Zhangzhidong Rd, Wuhan, China, Wuhan, 430060, CHINA
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Wang YQ, Wang X, Zhang JS, Yang BS, Zhu WJ, Wang ZP. Similar experimental study on retaining waterproof coal pillar in composite strata mining. Sci Rep 2022; 12:1366. [PMID: 35079074 PMCID: PMC8789923 DOI: 10.1038/s41598-022-05369-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2021] [Accepted: 01/11/2022] [Indexed: 11/30/2022] Open
Abstract
Numerous field examples of coal seam mining show that when coal seams under confined water are mined close to faults, water inrush effects on complex mining surfaces occur. Obeying similarity rules, physical similarity models consisting of sand, lime, and plaster were used to investigate the water conducting process, along with stress and displacement measured by a combination of mechanical senor, total station, and video camera-. Comparing the physical model tests with the calculation results of elastoplastic limit equilibrium theory, the rationality of the model has been verified. Besides, a safe width of the waterproof coal pillar has been obtained. It can be demonstrated from the model observations that the coal seam in front of the mining can be divided into three areas with different characteristics of stress and displacement, namely, which are the fault-affected area, the elastic area, and the plastic yield crack area. A closed-loop water inlet and outlet pipeline composed of a water control platform that can provide stable water pressure, and water bags pre-buried in the fault was used to simulate the water conduction in the fracture zone. Integrate the development law of stress, displacement, and water conduction coming from the upper and lower walls of the fault to further determine the reasonable width of the waterproof coal pillar.
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Affiliation(s)
- Y Q Wang
- School of Civil Engineering, Central South University, Changsha, 410075, China
| | - X Wang
- School of Civil Engineering, Central South University, Changsha, 410075, China. .,National Engineering Research Center of High-speed Railway Construction Technology, Central South University, Changsha, 410083, China.
| | - J S Zhang
- School of Civil Engineering, Central South University, Changsha, 410075, China.,National Engineering Research Center of High-speed Railway Construction Technology, Central South University, Changsha, 410083, China
| | - B S Yang
- School of Civil Engineering, Anhui Jianzhu University, Hefei, 230022, China
| | - W J Zhu
- School of Civil Engineering, Central South University, Changsha, 410075, China
| | - Z P Wang
- Qingdao Hisense Real Estate Co. Ltd, Qingdao, 266071, China
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6
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Lu XT, Li Y, Wang ZP, Guang XF, Feng XL, Zhang WH, Dai HL. [Clinical characteristics of patients with acute pulmonary embolism in high altitude area of Yunnan province in China]. Zhonghua Xin Xue Guan Bing Za Zhi 2022; 50:36-42. [PMID: 35045612 DOI: 10.3760/cma.j.cn112148-20211203-01045] [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: 06/14/2023]
Abstract
Objective: To analyze the clinical features of patients with acute pulmonary embolism (APE) living in high altitude area of Yunnan province. Methods: This was a cross-sectional retrospective study. APE patients, hospitalized in our hospital between January 2017 and December 2019, were included. The selected patients were divided into low-risk group, medium-risk group and high-risk group according to risk stratification. The clinical data of patients, including demographic data, the main symptoms, risk factors of APE, heart rate and systolic blood pressure and laboratory testing results (D-dimer, cardiac troponin I (cTNI), N terminal B-type natriuretic peptide (NT-proBNP)) and echocardiography and electrocardiogram examination results, were obtained through the electronic medical record system. The clinical characteristics of selected patients were analyzed. Results: A total of 392 patients, aged (63.5±15.7) years, 224 males (57.14%), were included in this study and there were 59 low-risk, 304 medium-risk and 29 high-risk patients in this cohort. The main clinical manifestations were chest pain (157(40.05%)), dyspnea (107(27.30%)), hemoptysis (55(14.03%)), syncope as the first symptom (20(5.10%)), and only 6 cases (1.53%) presented with the typical "Virchow's triad". Most of the patients were accompanied by atypical chest tightness (223(56.89%)) and cough (208(53.06%)). The main risk factors were venous thrombosis of lower limbs (179(45.66%)), hypertension (138(35.20%)), surgery (63(16.07%)), and chronic obstructive pulmonary disease (COPD) (62(15.82%)). There were 57 cases (14.54%) of coronary heart disease, 57 cases (14.54%) of diabetes, 51 cases (13.01%) of cerebral infarction, 47 cases (12.00%) of advanced age, 15 cases (3.83%) of tumor, 7 cases (1.79%) of activity restriction, 6 cases (1.53%) of pregnancy and 4 cases (1.02%) of hormone use in this cohort. The proportion of lower extremity venous thrombosis was significantly higher in low-risk group than in medium-risk group (P<0.01), COPD was more common in high-risk and medium-risk groups than in low-risk group (P<0.01), hypertension was more common in high-risk group than in medium-and low-risk groups (P<0.01). The proportion of advanced age was significantly higher in medium-risk group than in low-risk group (P<0.01). There were no significant differences in RBC and hemoglobin level between low-, medium-and high-risk groups (P>0.05). The level of D-dimer was significantly higher in high-risk group than in medium-and low-risk groups (P<0.05). Levels of NT-proBNP and cTNI were significantly higher in high-risk group than in medium- and low-risk groups (P<0.05). Increased proportion of cTNI and NT-proBNP was significantly higher in high-risk group than in medium- and low-risk groups (P<0.05). There were 105 (26.79%) patients with pulmonary hypertension (PAH). The incidence of PAH was significantly higher in high-risk group than in low-risk group (P<0.01). There were 104 patients (26.53%) with right ventricular enlargement, and the incidence of right ventricular enlargement was significantly higher in high-risk group than in medium-and low-risk groups (P<0.01). Characteristic changes of electrocardiogram in patient with APE were T-wave inversion of limb leads (98(25.00%)), followed by SⅠQⅢTⅢ (83(21.17%)). Conclusions: The main clinical manifestations of APE in Yunnan high altitude area are chest pain and dyspnea, and syncope is the first symptom in some patients, but the typical "Virchow's triad" is rare. The most common risk factors are lower extremity venous thrombosis, hypertension, and COPD. Clinical symptoms, risk factors and laboratory examination results differ among patients with different risk stratification.
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Affiliation(s)
- X T Lu
- Clinical Medicine Center and Key Laboratory for Cardiovascular Disease of Yunnan Province, Department of Cardiology, Yan'an Affiliated Hospital, Kunming Medical University, Kunming 650051, China
| | - Y Li
- Department of Respiratory and Critical Care Medicine, Yan'an Affiliated Hospital, Kunming Medical University, Kunming 650051, China
| | - Z P Wang
- Department of Respiratory and Critical Care Medicine, Yan'an Affiliated Hospital, Kunming Medical University, Kunming 650051, China
| | - X F Guang
- Clinical Medicine Center and Key Laboratory for Cardiovascular Disease of Yunnan Province, Department of Cardiology, Yan'an Affiliated Hospital, Kunming Medical University, Kunming 650051, China
| | - X L Feng
- Clinical Medicine Center and Key Laboratory for Cardiovascular Disease of Yunnan Province, Department of Cardiology, Yan'an Affiliated Hospital, Kunming Medical University, Kunming 650051, China
| | - W H Zhang
- Clinical Medicine Center and Key Laboratory for Cardiovascular Disease of Yunnan Province, Department of Cardiology, Yan'an Affiliated Hospital, Kunming Medical University, Kunming 650051, China
| | - H L Dai
- Clinical Medicine Center and Key Laboratory for Cardiovascular Disease of Yunnan Province, Department of Cardiology, Yan'an Affiliated Hospital, Kunming Medical University, Kunming 650051, China
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Wang YY, He YL, Chi YJ, Zhai XY, An TT, Li JJ, Zhuo ML, Zhao J, Wang ZP. [Progress in treatment for malignant pleural mesothelioma]. Zhonghua Jie He He Hu Xi Za Zhi 2022; 45:111-115. [PMID: 35000316 DOI: 10.3760/cma.j.cn112147-20210413-00245] [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: 06/14/2023]
Abstract
Malignant pleural mesothelioma (MPM) is a kind of invasive malignant tumor originated from pleural tissue. The incidence of MPM is not high in the population, but the prognosis is very poor. The median survival time is only about 12 months. Pemetrexed combined with platinum is the first-line chemotherapy regimen recommended by the current guidelines. The use of bevacizumab will further prolong the survival of chemotherapy. Once resistance happened, no anti-tumor treatment has been confirmed to achieve survival benefits. Therefore, there is no recommended standard second-line MPM regimen in international and domestic guidelines, including National Comprehensive Cancer Network (NCCN) guidelines. Vinorelbine, gemcitabine and other monotherapy regimens are commonly used in clinical practice, but the median progression free survival (PFS) is only about 3 months. Immune checkpoint inhibitors (ICIS) have been proved to have a significant inhibitory effect on tumor growth in a variety of malignant tumors, and their efficacy is related to the expression of programmed death-ligand 1(PD-L1). In unresectable MPM, programmed death 1 (PD-1)/PD-L1 inhibitors have been used in a series of clinical studies in the first-line, second-line and above treatment. Some of the results have been cited and recommended by international guidelines, but the overall efficacy improvement is still limited. This review summarizes the latest clinical studies and researches in the field of MPM treatment and predicts the directions and prospect of improving the therapeutic effect in the future.
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Affiliation(s)
- Y Y Wang
- Department of Thoracic Medical Oncology Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Beijing Institute for Cancer Research, Beijing 100142, China
| | - Y L He
- Department of Thoracic Medical Oncology Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Beijing Institute for Cancer Research, Beijing 100142, China
| | - Y J Chi
- Department of Thoracic Medical Oncology Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Beijing Institute for Cancer Research, Beijing 100142, China
| | - X Y Zhai
- Department of Thoracic Medical Oncology Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Beijing Institute for Cancer Research, Beijing 100142, China
| | - T T An
- Department of Thoracic Medical Oncology Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Beijing Institute for Cancer Research, Beijing 100142, China
| | - J J Li
- Department of Thoracic Medical Oncology Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Beijing Institute for Cancer Research, Beijing 100142, China
| | - M L Zhuo
- Department of Thoracic Medical Oncology Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Beijing Institute for Cancer Research, Beijing 100142, China
| | - J Zhao
- Department of Thoracic Medical Oncology Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Beijing Institute for Cancer Research, Beijing 100142, China
| | - Z P Wang
- Department of Thoracic Medical Oncology Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education), Peking University Cancer Hospital and Beijing Institute for Cancer Research, Beijing 100142, China
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Ni XL, Yuan HP, Jiao J, Wang ZP, Su HB, Lyu Y, Pang GF, Zhang W, Sun L, Hu CY, Yang Z. [An epigenetic clock model for assessing the human biological age of healthy aging]. Zhonghua Yi Xue Za Zhi 2022; 102:119-124. [PMID: 35012300 DOI: 10.3760/cma.j.cn112137-20210817-01862] [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: 06/14/2023]
Abstract
Objective: To construct an epigenetic clock model for assessing and calibrating human biological age. Methods: Convenience sampling was used to select 186 subjects from the longevity cohort of Guangxi Zhuang Antonornous Region from July 1 to November 30, 2019, and 124 subjects from the physical examination population of the Seventh Medical Center of the PLA General Hospital from October 1 to December 31, 2020. Self-designed questionnaire was applied to collect demographic characteristics and family history of disease. Physical examination was applied to determine heart rate and blood pressure. Fasting peripheral venous blood was drawn for determination of fasting plasma glucose, plasma total cholesterol, triglyceride, plasma high-density lipoprotein cholesterol, plasma low-density lipoprotein cholesterol and telomere length. Methylation levels of EDARADD cg09809672, IPO8 cg19722847, NHLRC1 cg22736354, P2RX6 cg05442902 and SCGN cg06493994 were detected by targeted methylation site sequencing. A total of 54 subjects with unqualified quality control of DNA methylation and telomere length were excluded, and 256 subjects' data were finally analyzed. Trend test was used for the change of methylation level among different ages groups, multiple linear regression method was used to build prediction models of biological age. Kendal rank correlation analysis was used to evaluate the correlation of age gap (Gregorian calendar age minus biological age) with telomere length. Independent sample t-test was used to compare the health-related indicators between subjects with different age gap within different age groups. Results: The M(Q1, Q3)of age of subjects were 67 (51, 91) years old, including 166 females (64.84%). With increase of age, the methylation levels of gene loci were decreased (EDARADD cg09809672, IPO8 cg19722847 and P2RX6 cg05442902) and increased (NHLRC1 cg22736354 and SCGN cg06493994) (all P values<0.05). The established biological age prediction model was as follows: Y=-53.121×EDARADD cg09809672-137.564×IPO8 cg19722847+141.040×NHLRC1 cg22736354-67.893×P2RX6 cg05442902+149.547×SCGNcg06493994+4.592×sex+64.185 (R2=0.86, P<0.001), where Y was the biological age, and the items in the equation were methylation level, sex (male =1, female =2) and intercept in sequence. The Kendall rank correlation coefficient between age gap and telomere length was 0.731 (P<0.001). Compared with the subjects whose age gaP<0, the subjects with age gaP≥0 had higher systolic blood pressure in adolescence [(88.50±8.89) and (109.83±9.48) mmHg, respectively, 1 mmHg=0.133 kPa]; lower TC [(5.48±0.23) and (3.98±0.54) mmol/L, respectively, ] and TG [(3.51±0.32) and (3.41±0.20) mmol/L] in young adults; lower fasting blood glucose in middle age [(6.17±0.67) and (5.37±0.79) mmol/L, respectively, ] and higher diastolic blood pressure in nonagenarian age [(76.99±6.78) and (83.97±9.36) mmHg, respectively, ] (all P values<0.05). Conclusion: The constructed epigenetic clock model can be used to evaluate and calibrate human biological age.
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Affiliation(s)
- X L Ni
- The Key Laboratory of Geriatrics, Beijing Institute of Geriatrics, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing Hospital/National Center of Gerontology of National Health Commission, Beijing 100730, China
| | - H P Yuan
- The Key Laboratory of Geriatrics, Beijing Institute of Geriatrics, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing Hospital/National Center of Gerontology of National Health Commission, Beijing 100730, China
| | - J Jiao
- Clinical Lab, the Seventh Medical Center of Chinese People's Liberation Army General Hospital, Beijing 100700, China
| | - Z P Wang
- The Key Laboratory of Geriatrics, Beijing Institute of Geriatrics, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing Hospital/National Center of Gerontology of National Health Commission, Beijing 100730, China
| | - H B Su
- Department of Prevention and Health Protection, Jiangbin Hospital, Guangxi Zhuang Autonomous Region, Nanning 530021, China
| | - Y Lyu
- Neurological Department, Jiangbin Hospital, Guangxi Zhuang Autonomous Region, Nanning 530021, China
| | - G F Pang
- Neurological Department, Jiangbin Hospital, Guangxi Zhuang Autonomous Region, Nanning 530021, China
| | - W Zhang
- Neurological Department, Jiangbin Hospital, Guangxi Zhuang Autonomous Region, Nanning 530021, China
| | - L Sun
- The Key Laboratory of Geriatrics, Beijing Institute of Geriatrics, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing Hospital/National Center of Gerontology of National Health Commission, Beijing 100730, China
| | - C Y Hu
- Neurological Department, Jiangbin Hospital, Guangxi Zhuang Autonomous Region, Nanning 530021, China
| | - Z Yang
- The Key Laboratory of Geriatrics, Beijing Institute of Geriatrics, Institute of Geriatric Medicine, Chinese Academy of Medical Sciences, Beijing Hospital/National Center of Gerontology of National Health Commission, Beijing 100730, China
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Zhang Y, Lyu ZY, Yang L, Wang SF, Zhang LW, Sheng C, Wang ZP, Zhang YC, Wang H, Huang YB, Chen KX. [Potential pleiotropism of cancer-related single nucleotide polymorphisms among Chinese population]. Zhonghua Yu Fang Yi Xue Za Zhi 2021; 55:1203-1208. [PMID: 34706505 DOI: 10.3760/cma.j.cn112150-20201121-01390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the potential pleiotropism of cancer-related single nucleotide polymorphisms (SNPs) among Chinese population. Methods: Based on the catalogue of GWAS jointly constructed by the National Human Genome Research Institute and the European Institute of Bioinformatics, according to population origin (Chinese population and non-Chinese population) and disease traits (cancer and non-cancer traits). All SNPs found by GWAS before August 2020 were divided into four categories: cancer in Chinese population, non-cancer in Chinese population, cancer in non-Chinese population and non-cancer in non-Chinese population. The number, correlation and linkage of the four categories of SNPs were described. Results: By August 2020, a total of 196 813 SNPs from 4 096 GWAS were included in the GWAS directory. The information that SNPs refer to unknown or were not related to the disease was excluded, and 117 441 independent SNPs were finally included. There were 619 SNPs related to cancer and 9 569 SNPs related to non-cancer disease in Chinese population, respectively. There were 4 624 SNPs related to cancer and 106 448 SNPs related to non-cancer disease (trait) in non-Chinese population, respectively. Three SNPs, rs2736100, rs6983267 and rs401681, were associated with two or more types of cancer in both Chinese and non-Chinese populations. Seven SNPs, rs7705526, rs2736100, rs10993994, rs2735839, rs4430796, rs174537 and rs9271588, were associated with cancer and non-cancer diseases in both Chinese and non-Chinese populations, respectively. Conclusion: There is a potential pleiotropism of cancer-related SNPs in Chinese population.
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Affiliation(s)
- Y Zhang
- Department of Cancer Epidemiology and Biostatistics, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China
| | - Z Y Lyu
- Department of Cancer Epidemiology and Biostatistics, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China
| | - L Yang
- Beijing Office for Cancer Prevention and Control, Peking University Cancer Hospital & Institute, Beijing 100142, China
| | - S F Wang
- Department of Epidemiology & Bio-statistics, School of Public Health, Peking University Health Science Center, Beijing 100191, China
| | - L W Zhang
- Department of Cancer Epidemiology and Biostatistics, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China
| | - C Sheng
- Department of Cancer Epidemiology and Biostatistics, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China
| | - Z P Wang
- Department of Cancer Epidemiology and Biostatistics, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China
| | - Y C Zhang
- Department of Cancer Epidemiology and Biostatistics, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China
| | - H Wang
- Department of Cancer Epidemiology and Biostatistics, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China
| | - Y B Huang
- Department of Cancer Epidemiology and Biostatistics, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China
| | - K X Chen
- Department of Cancer Epidemiology and Biostatistics, Tianjin Medical University Cancer Institute and Hospital, Tianjin 300060, China
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Abstract
The microfluidic flow is typically laminar due to the dominant viscous effects. At Reynolds numbers far below 1 (Re ≪ 1), the fluid inertia can be neglected. For the steady flow of incompressible Newtonian fluids, it approaches linear Stokes flow. At intermediate Re, there exists a weak-inertia flow regime where secondary flows such as Dean vortices are accessible for microfluidic manipulations. Apart from the fluid inertia, other nonlinear factors such as the non-Newtonian fluid properties, concurrent flow of dissimilar fluids, compliant fluidic structures and stimuli-responsive materials can also cause intriguing flow behaviours. Through proper designs, they can be applied for a variety of microfluidic components including mixers, valves, oscillators, stabilizers and auto-regulators etc., greatly enriching the microfluidic flow control and manipulation strategies. Due to its unique working characteristics and advantages, nonlinear microfluidics has increasingly attracted extensive attention. This review presents a systematic survey on this subject. The designs of typical nonlinear microfluidic devices, their working mechanisms, key applications, and the perspective of their future developments will be discussed. The nonlinear microfluidic techniques are believed to play an essential role in the next generation of highly-integrated, automated, and intelligent microfluidics.
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Affiliation(s)
- H M Xia
- School of Mechanical Engineering, Nanjing University of Science and Technology, Nanjing 210094, P. R. China.
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Liu XA, Fu LL, Zhai YF, Wang ZP. [An analysis of the status quo of ground-level ozone pollution research]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2021; 39:123-129. [PMID: 33691367 DOI: 10.3760/cma.j.cn121094-20200114-00027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To analyze the research status of ground-level ozone pollution, explore research trends and hot spots, and provide references for future research on air pollution. Methods: Papers on ground-level ozone pollution research published before December 31, 2019 had been retrieved in SCI-E database of the "Web of Science Core Collection" in January 2020. The retrieval strategies were set as follows: TS= ( ("Tropospheric Ozone" OR "Low Level Ozone" OR "Ground Level Ozone") AND ("Air pollution*" OR "Air quality") ) . The survey included 2084 articles. By using bibliometric research and visual analysis tools, the research status of global ground-level ozone pollution was revealed from the aspects of time, discipline, journal, financing, institution, country and key words. Results: Cumulative publications increased in a cubic function of y=0.05x(3)+0.80x(2)+0.74x+4.55 (R(2)=0.999, P<0.01) . The most studied subject was Environmental sciences ecology (1401 articles, 67.23%) . Atmospheric Environment was the journal with the most articles (332 articles, 15.93%) . The United States was the country with the most publications (44.67%, 931/2084) , while China ranked second (17.13%, 357/2084) . 80.39% (287/357) of Chinese papers had funding information. Among the top 10 research institutions, 7 and 2 were affiliated to the United States and China respectively. Source apportionment and human health were high frequency keywords that had appeared in the last 5 years. Conclusion: The research on ground-level ozone pollution is in a good period of development. The United States has a leading position in this area, and China has a good prospect in this field. Pollution source apportionment and human health effects are new research directions.
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Affiliation(s)
- X A Liu
- Department of Occupational and Environmental Health, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - L L Fu
- Department of Occupational and Environmental Health, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - Y F Zhai
- Department of Occupational and Environmental Health, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - Z P Wang
- Department of Occupational and Environmental Health, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
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Su HB, Ni XL, Wang ZP, Zhang L, Pang GF, Lyu Y, Zhang W, Yuan HP, Sun L, Yang Z, Hu CY. [Analysis of distribution characteristics and influencing factors of healthy and long-lived people in Shanglin area of Nanning, Guangxi Zhuang Autonomous Region]. Zhonghua Liu Xing Bing Xue Za Zhi 2021; 42:106-112. [PMID: 33503705 DOI: 10.3760/cma.j.cn112338-20200422-00624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To explore the epidemiologic characteristics of long-lived population and influencing factors in Shanglin county of Guangxi and provide scientific basis for the study of health and longevity in Guangxi. Methods: We collected and analyzed the general demographic cross-sectional data of the long-lived individuals (≥90 years old) in 11 villages and towns by multi-source registration and face-to-face interview. The age group control design was adopted to conduct a comparison among the longevity group (90-100 years old), centenarian group (≥100 years old), the longevity plus centenarian group and control group (local population aged 40-85 years), and identify the factors related to longevity. Results: Among the 496 007 people registered in Shanglin, 1 533 were aged ≥90 years, including 1 453 in the longevity group, with an average age of (92.84±2.46) years, and 80 in the centenarian group, with an average age of (102.67±2.60) years. The spatial distribution of long-lived individuals and centenarians was mainly in the north and central areas, and sparse in southwest area. Analysis on factors related to health and longevity indicated that old people with Zhuang ethnic (OR=1.551,95%CI:1.308-1.838), married (OR=55.507,95%CI:36.087-85.377) and moderately high waist-to-hip ratio (OR=258.056,95%CI:27.775-2 397.569), and SBP (OR=1.019,95%CI:1.013-1.026) tended to live longer. Conclusions: We found that the rate of longevity in Shanglin was higher than the average level in Guangxi and China. Longevity in Shanglin country had unique spatial and population distribution characterics of female longevity more than male longevity, mainly Zhuang ethnic and so on. Being women, married, family history of longevity, appropriate high waist-to-hip ratio, SBP and blood sugar level might be positive factors for longevity in Shanglin, but the impacts of other factors on longevity need further study.
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Affiliation(s)
- H B Su
- Department of Prevention and Health Protection, Jiangbin Hospital, Guangxi Zhuang Autonomous Region, Nanning 530021, China
| | - X L Ni
- The Key Laboratory of Geriatrics, Beijing Institute of Geriatrics, Beijing Hospital, National Center of Gerontology, National Health Commission; Institute of Geriatric Medicine,Chinese Academy of Medical Sciences, Beijing 100730, China;Graduate School of Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Z P Wang
- The Key Laboratory of Geriatrics, Beijing Institute of Geriatrics, Beijing Hospital, National Center of Gerontology, National Health Commission; Institute of Geriatric Medicine,Chinese Academy of Medical Sciences, Beijing 100730, China
| | - L Zhang
- The Key Laboratory of Geriatrics, Beijing Institute of Geriatrics, Beijing Hospital, National Center of Gerontology, National Health Commission; Institute of Geriatric Medicine,Chinese Academy of Medical Sciences, Beijing 100730, China;Graduate School of Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - G F Pang
- Neurological Department, Jiangbin Hospital, Guangxi Zhuang Autonomous Region, Nanning 530021, China
| | - Y Lyu
- Neurological Department, Jiangbin Hospital, Guangxi Zhuang Autonomous Region, Nanning 530021, China
| | - W Zhang
- Neurological Department, Jiangbin Hospital, Guangxi Zhuang Autonomous Region, Nanning 530021, China
| | - H P Yuan
- The Key Laboratory of Geriatrics, Beijing Institute of Geriatrics, Beijing Hospital, National Center of Gerontology, National Health Commission; Institute of Geriatric Medicine,Chinese Academy of Medical Sciences, Beijing 100730, China
| | - L Sun
- The Key Laboratory of Geriatrics, Beijing Institute of Geriatrics, Beijing Hospital, National Center of Gerontology, National Health Commission; Institute of Geriatric Medicine,Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Z Yang
- The Key Laboratory of Geriatrics, Beijing Institute of Geriatrics, Beijing Hospital, National Center of Gerontology, National Health Commission; Institute of Geriatric Medicine,Chinese Academy of Medical Sciences, Beijing 100730, China
| | - C Y Hu
- Neurological Department, Jiangbin Hospital, Guangxi Zhuang Autonomous Region, Nanning 530021, China
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Ni XL, Zhang L, Wang ZP, Su HB, Pang GF, Lyu Y, Zhang W, Yuan HP, Sun L, Yang Z, Hu CY. [The study on the distribution characteristics and relevant factors of healthy and long-lived people in multiple regions of Guangxi Zhuang Autonomous Region]. Zhonghua Liu Xing Bing Xue Za Zhi 2021; 42:99-105. [PMID: 33503704 DOI: 10.3760/cma.j.cn112338-20200425-00651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the epidemiological characteristics and relevant factors among individuals characterized by their longevity in multiple regions of Guangxi Zhuang Autonomous Region, and provide a valuable scientific perspective for the research in health and longevity of the elderly in Guangxi. Methods: Registration and face-to-face questionnaire on a door-to-door basis were adopted to collect the demographic characteristics of the long-lived individuals (≥90 years old) in Bama of Hechi city, Yongfu of Guilin city, Dongxing of Fangchenggang city, Guangxi. Then, among the local general population, individuals within the age group between 40 and 85 years old were selected randomly as controls. Correlations were then analyzed between the relative health and longevity of the subjects and their gender, ethnicity, family history, disease history, marital status, the number of family generations, the number of children, smoking, drinking, outdoor activities, sleep and other health-related factors, then the result was subject to further analysis by comparing the long-lived population and the control population respectively. Results: Among 691 500 of the permanent residents of Bama, Yongfu and Dongxing city, 1 005 cases were 90 years old and over with a ratio of 145.34 out of 100 000 persons; within the 1 005 cases, 944 were aged between 90 and 100 (longevity rate: 136.51/100 000) with an average age of (93.28±2.57); 61 cases were aged 100 or over, arriving at a centenarian rate of 8.82/100 000 with an average age of (102.00±3.05) years. Significant differences were found just among three particular factors - regional distribution (P=0.014), history of disease (P=0.002), four generations of family (P=0.008) between nonagenarians and centenarians (P<0.05), while the other 15 indicators did not show anything noteworthy. The result indicated that longevity and centenarians might be the same group and then we combined both groups into one. By cross-comparison between the longevity-plus- centenarians and the control group in the region, factors listed below exhibited significant correlation with health and longevity: marital status (OR=26.469, 95%CI: 13.208-53.045), number of generations within the family (OR=5.419, 95%CI: 3.418-8.592), number of male offspring (OR=2.013, 95%CI: 1.555-2.607), number of female offspring (OR=1.380, 95%CI: 1.122-1.696), and the frequency of outdoor activities (OR=10.226, 95%CI: 3.164-33.045). Conclusions: The longevity rate is higher in the general natural population in Bama, Yongfu and Dongxing of Guangxi. The phenomenon may owe to favorable family structure, atmosphere within or out of the family or other elements related with social surrounding. Among them all, mentality, inclination to physical exercise and regular rhythm of life may all exert tremendous contributory influence here.
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Affiliation(s)
- X L Ni
- The Key Laboratory of Geriatrics, Beijing Institute of Geriatrics, Beijing Hospital, National Center of Gerontology, National Health Commission; Institute of Geriatric Medicine,Chinese Academy of Medical Sciences, Beijing 100730, China;Graduate School of Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - L Zhang
- The Key Laboratory of Geriatrics, Beijing Institute of Geriatrics, Beijing Hospital, National Center of Gerontology, National Health Commission; Institute of Geriatric Medicine,Chinese Academy of Medical Sciences, Beijing 100730, China;Graduate School of Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Z P Wang
- The Key Laboratory of Geriatrics, Beijing Institute of Geriatrics, Beijing Hospital, National Center of Gerontology, National Health Commission; Institute of Geriatric Medicine,Chinese Academy of Medical Sciences, Beijing 100730, China
| | - H B Su
- Neurological Department, Jiangbin Hospital, Guangxi Zhuang Autonomous Region, Nanning 530021, China
| | - G F Pang
- Neurological Department, Jiangbin Hospital, Guangxi Zhuang Autonomous Region, Nanning 530021, China
| | - Y Lyu
- Neurological Department, Jiangbin Hospital, Guangxi Zhuang Autonomous Region, Nanning 530021, China
| | - W Zhang
- Neurological Department, Jiangbin Hospital, Guangxi Zhuang Autonomous Region, Nanning 530021, China
| | - H P Yuan
- The Key Laboratory of Geriatrics, Beijing Institute of Geriatrics, Beijing Hospital, National Center of Gerontology, National Health Commission; Institute of Geriatric Medicine,Chinese Academy of Medical Sciences, Beijing 100730, China
| | - L Sun
- The Key Laboratory of Geriatrics, Beijing Institute of Geriatrics, Beijing Hospital, National Center of Gerontology, National Health Commission; Institute of Geriatric Medicine,Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Z Yang
- The Key Laboratory of Geriatrics, Beijing Institute of Geriatrics, Beijing Hospital, National Center of Gerontology, National Health Commission; Institute of Geriatric Medicine,Chinese Academy of Medical Sciences, Beijing 100730, China;Graduate School of Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - C Y Hu
- Neurological Department, Jiangbin Hospital, Guangxi Zhuang Autonomous Region, Nanning 530021, China
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Zhong J, Zheng QW, Zhao J, Wang ZP, Wu MN, Zhuo ML, Wang YY, Li JJ, Yang X, Chen HX, An TT. [Therapeutic efficacy analysis of immunotherapy in small cell lung cancer]. Zhonghua Zhong Liu Za Zhi 2020; 42:771-776. [PMID: 32988161 DOI: 10.3760/cma.j.cn112152-20200324-00253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: Recently, increasing number of lung cancer patients benefit from immune-checkpoint inhibitors (ICIs). However, the data of Chinese small cell lung cancer (SCLC) patients is limited. This study aims to analyze the response and survival data of ICIs treatment in SCLC and to explore the predictive biomarkers. Methods: Forty-seven SCLC patients who received ICIs treatment from Peking University Cancer Hospital from May 2017 to September 2019 was recruited. Clinical characteristics including sex, age, smoking status, ICIs strategy, PD-L1 expression and therapeutic efficacy were collected to explore the clinical predictive biomarkers for SCLC ICIs treatment. Results: Among the 47 patients, 18 (38.3%) cases were partial repose (PR), 11 (23.4%) were stable disease (SD), 18 (38.3%) were progressive disease (PD), and the objective response rate (ORR) was 38.3%, disease control rate (DCR) was 61.7%, the median progression-free survival (PFS) was 5.3 months. ICIs monotherapy accounts for 27.7%, the ORR was 15.4%, DCR was 53.8%, median PFS was 2.7 months. Combined therapy accounts for 72.3%, the ORR was 47.1%, DCR was 64.7%, median PFS was 5.4 months. Fourteen (29.8%) patients received ICIs as the first line treatment, their ORR was 85.7%, DCR was 100%, median PFS was 9.1 month. The ORR was not related to the age, sex, body mass index (BMI), smoking status and programmed death-ligand 1 (PD-L1) expression (P>0.05). The ORRs were higher in patients underwent PD-L1 monotherapy (P=0.001), combined therapy (P=0.002) and received ICIs as the first line treatment (P<0.001). Log-rank analysis indicated that the PFS of female patients were 12.0 months, significantly longer than 4.4 months of male patients in ICIs treatment (P=0.038). Patients who received PD-L1 monotherapy, combined treatment, or ICIs as the first line treatment had longer PFS than their counterparts, though no statistical significant was observed (P>0.05). Cox multivariate analysis showed that, the gender was not an independent predictor for PFS in ICIs treatment (HR=3.777, 95%CI=0.974~30.891, P=0.054). Conclusions: Immunotherapy is an effective treatment strategy for SCLC. Patients who receive combined ICIs treatment, first line ICIs treatment and PD-L1 treatment may get greater benefits. PD-L1 expression cannot predict the response and PFS in SCLC ICIs treatment.
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Affiliation(s)
- J Zhong
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education Beijing), Department of Thoracic Medical Oncology, Peking University Cancer Hospital & Institute, Beijing 100142, China
| | - Q W Zheng
- Department of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing 100191, China
| | - J Zhao
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education Beijing), Department of Thoracic Medical Oncology, Peking University Cancer Hospital & Institute, Beijing 100142, China
| | - Z P Wang
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education Beijing), Department of Thoracic Medical Oncology, Peking University Cancer Hospital & Institute, Beijing 100142, China
| | - M N Wu
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education Beijing), Department of Thoracic Medical Oncology, Peking University Cancer Hospital & Institute, Beijing 100142, China
| | - M L Zhuo
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education Beijing), Department of Thoracic Medical Oncology, Peking University Cancer Hospital & Institute, Beijing 100142, China
| | - Y Y Wang
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education Beijing), Department of Thoracic Medical Oncology, Peking University Cancer Hospital & Institute, Beijing 100142, China
| | - J J Li
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education Beijing), Department of Thoracic Medical Oncology, Peking University Cancer Hospital & Institute, Beijing 100142, China
| | - X Yang
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education Beijing), Department of Thoracic Medical Oncology, Peking University Cancer Hospital & Institute, Beijing 100142, China
| | - H X Chen
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education Beijing), Department of Thoracic Medical Oncology, Peking University Cancer Hospital & Institute, Beijing 100142, China
| | - T T An
- Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education Beijing), Department of Thoracic Medical Oncology, Peking University Cancer Hospital & Institute, Beijing 100142, China
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Liu Y, Fu LL, Lin MM, Wang ZP. [A bibliometric analysis of research on occupational asthma during 1998 to 2017]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2019; 37:425-431. [PMID: 31256523 DOI: 10.3760/cma.j.issn.1001-9391.2019.06.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To understand the research status of occupational asthma and provide information for related research on occupational asthma in the future. Methods: Papers on occupational asthma published from January 1998 to December 2017 had been retrieved in Web of Science core collection database on 9 October 2018. The data retrieval strategies were set as follows: #1 TS=(occupational AND asthma), #2 TS=(occupational AND asthmas), #3 TS=(occupational asthma OR occupational asthmas), #1 OR #2 OR #3. Three thousand two hundred and twelve publications were analyzed by bibliometric and visualizer. Results: Yearly output of articles in this field had been at a stable high level and annual total citations had been increasing. A significant positive correlation was found between the year and annual total citations (r=0.97, P<0.05). The most productive countries were European countries except the United States and Canada. Our country had few literatures accounting for 1.21 percent of the total and the research on occupational asthma in our country started relatively late which were published mainly from 2013 to 2017. The most studied category and journal were public environmental occupational health and Am J Ind Med respectively. "occupational exposure", "allergy" and "rhinitis" were key words with high frequency. Conclusion: Yearly output of publications of occupational asthma has been at a stable high level. Our country should do more research to provide a scientific basis for further prevention and management of occupational asthma.
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Affiliation(s)
- Y Liu
- Department of Occupational and Environmental Health, School of Public Health, Shandong University, Jinan 250012, China
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Huang FY, Wu YL, Wang ZP. [The intervention effect of N-carbamoyl glutamic acid on embryo implantation disorder induced by carbon disulfide and its possible molecular mechanism]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2019; 37:90-95. [PMID: 30929347 DOI: 10.3760/cma.j.issn.1001-9391.2019.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To explore the preventive effect and possible molecular mechanism of dietary supplementation of N-carbamylglutamate (NCG) in the implantation of carbon disulfide (CS(2)) into embryo implantation disorders. Methods: embryo implantation disorder model was established by single intraperitoneal exposure to CS(2) on the 3rd, 4th, and 5th days after pregnancy. Endometrial tissues were collected for 24h after exposure to CS(2) for western-blot and immunohistochemical staining. Results: The number of embryo implantation was increased in NCG+CS(2) group, compared with CS(2) alone group. Day 4 of pregnancy when CS(2)-exposed after 24 h, the expression of pAKT protein in NCG+CS(2) group was significantly increased (P<0.05), the expression level of pAMPK protein in NCG+CS(2) group was significantly decreased, compared with CS(2) alone group, respectively. Immunohistochemical results showed that pAKT, pAMPK, AKT and AMPK proteins were expressed in luminal epithelial cells, glandular epithelial cells and stromal cells of endometrium; Day 4 of pregnancy when CS(2)-exposed after 24 h, deep staining of ATK and pAKT protein in NCG+CS(2) group, the AMPK and pAMPK protein staining became lighter. Conclusion: Dietary supplementation of NCG can interfere with the embryo loss induced by CS(2) by altering the total amount of AKT/AMPK molecules.
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Affiliation(s)
- F Y Huang
- Department of Environmental and Occupational Health, School of Public Health, Shandong University, Jinan 250012, China
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Mao D, Liu AH, Wang ZP, Zhang XW, Lu H. Cucurbitacin B inhibits cell proliferation and induces cell apoptosis in colorectal cancer by modulating methylation status of BTG3. Neoplasma 2019; 66:593-602. [PMID: 31058532 DOI: 10.4149/neo_2018_180929n729] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Accepted: 02/27/2019] [Indexed: 11/08/2022]
Abstract
A previous report has revealed that cucurbitacin B (CuB) inhibits cancer cell proliferation and tumorigenesis in non-small cell lung cancer (NSCLC) through epigenetic modifications of several genes. However, whether CuB regulates cell proliferation and apoptosis by altering methylation status of BTG3 in colorectal cancer (CRC) remains unknown. In the present study, the results showed that BTG3 was downregulated in CRC tissues compared with adjacent normal tissues. CuB significantly increased BTG3 levels, induced promoter demethylation, and decreased the levels of DNA methyltransferases (DNMT1, DNMT3a and DNMT3b) in both CRC cell lines (SW480 and Caco-2), and the effects of CuB were comparable with those of 5-Aza-dC. We also found that CuB inhibited cell proliferation, accompanied with decreased expression of Ki67. Furthermore, CuB treatment induced cell cycle arrest at G1 phase in SW480 and Caco-2 cells, as well as decreased levels of Cyclin D1 and Cyclin E1. Incubation with CuB promoted cell apoptosis in both CRC cell lines in vitro, accompanied with elevation of cleaved caspase-3 and cleaved PARP. BTG3 knockdown abolished the effects of CuB in CRC cells. In summary, CuB-induced proliferation inhibition and cell apoptosis may be due to the reactivation of BTG3 by promoter demethylation. CuB may be a promising agent for CRC therapy.
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Affiliation(s)
- D Mao
- Department of Colorectal Surgery, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, China
| | - A H Liu
- Department of Colorectal Surgery, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, China
| | - Z P Wang
- Department of Colorectal Surgery, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, China
| | - X W Zhang
- Department of Colorectal Surgery, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, China
| | - H Lu
- Department of Colorectal Surgery, The First Affiliated Hospital of Jinzhou Medical University, Jinzhou, China
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Wei SP, Fan F, Chen J, Liu XL, Yang YR, Wang ZP, Song S, Li ZH, Wei MX, Wang DN, Li SW, Xia NS. [Establishment and evaluation of a triple-color human papillomavirus pseudovirion neutralization assay]. Zhonghua Yu Fang Yi Xue Za Zhi 2019; 52:1039-1044. [PMID: 30392324 DOI: 10.3760/cma.j.issn.0253-9624.2018.10.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To establish a triple-color pseudovirion-based neutralization assay (PBNA) and evaluate its capability of detecting immunogenicity of the sera generated by the immunization of HPV 9-valent vaccine. Methods: HPV pseudovirus (PsVs) 6/11/16/18/31/33/45/52/58 with the encapsidated fluorescence expressing red fluorescent plasmid N31-MCHREEY, green fluorescent N31-EGFP or blue fluorescent N31-mTagBFP were generated. The concentration of HPV PsVs and the infection titers of HPV PsVs were detected by double-antibody sandwich ELISA and TCID(50), respectively. The single- and triple color HPV 16/33/45 PsVs were used to detect the neutralization titers of mice sera immunized with HPV 9-valent vaccine and confirmed the accuracy and specificity of the triple-color PBNAs. Then, the single- and triple color HPV 6/11/18/31/33/45/52/58 PsVs were employed to detect the neutralization titers of cynomolgus macaques sera immunized with HPV 9-valent vaccine and determined whether the triple-color PBNAs could be applied to evaluate the immunogenicity of the sera generated by the immunization of HPV9-valent vaccine. Results: The concentration of HPV16 PsVs encapsulating green, red or blue fluorescent plasmid was 5.0 to 6.0 μg/ml and HPV6/11/18/31/33/45/52/59 triple-color HPV PsVs was about 1.0 to 3.0 μg/ml. 9 types HPV PsVs containing EGFP, Mcherry or mTagBFP reporter plasmid were obtained and the concentration can meet the need of neutralization detection. 9 types single-color fluorescent HPV PsVs had similar infectivity against 293FT cells with the infection titer values between 1×10(4) and 1×10(5). The results of PBNAs showed that there was no significant difference in the anti-HPV neutralization titers of mice sera induced by HPV 9-valent vaccine between single-color and triple-color HPV16/33/45 PsVs (P>0.05). Similarly, there was also no significant difference in the anti-HPV neutralization titers of cynomolgus macaques sera induced by HPV 9-valent vaccine between single-color and triple-color HPV6/11/18/31/33/45/52/58 PsVs (P>0.05). Conclusion: We successfully established the triple-color PBNAs and verified the accuracy and specificity of triple-color PBNAs consistent with single-color PBNAs. The triple-color PBNAs can be applied to evaluate the immunogenicity of HPV 9-valent vaccine's immune serum.
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Affiliation(s)
- S P Wei
- National Institute of Diagnostics and Vaccine Development of Infectious Diseases, State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, School of Life Sciences, Xiamen University, Xiamen 361102, China
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Min YN, Liu FX, Qi X, Ji S, Cui L, Wang ZP, Gao YP. Effects of organic zinc on tibia quality, mineral deposit, and metallothionein expression level of aged hens. Poult Sci 2019; 98:366-372. [PMID: 30184139 PMCID: PMC6347128 DOI: 10.3382/ps/pey386] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2017] [Accepted: 08/27/2018] [Indexed: 11/23/2022] Open
Abstract
The study aimed to determine the effects of methionine hydroxy analog chelate zinc on the tibia quality, mineral deposit, apparent retention of nutrients, and liver metallothionein (MT) expression level of aged laying hens. A total of 960 layers (Hy-Line Grey, 57 wk old) were randomly assigned into 4 groups, and each group had 8 replicates of 30 hens. During the first 2 wk, groups were fed a basal diet without extra zinc (Zn: 35.08 mg/kg). During the ensuing 14 wk, 4 levels of Zn (inorganic Zn: 80 mg/kg; organic Zn: 20, 40, 80 mg/kg) were added to the diet. The results indicated that both the Zn source and level did influence tibia strength and calcium (Ca) and Zn concentrations of tibia (P < 0.05), whereas there were no differences in the copper (Cu) and phosphorus (P) concentrations of the tibia and the tibia length (P > 0.05). Moreover, dietary supplementation with 40 or 80 mg/kg of organic Zn showed higher Zn and Ca concentrations in the tibia and higher tibia strength. The Cu concentration in the liver showed no difference among the 4 treatments, whereas the Zn concentration in the liver increased with the increasing Zn level. The apparent retention of P, iron (Fe), and manganese (Mn) was not affected by the Zn level or source (P > 0.05). However, the organic Zn group increased the apparent retention of Cu, Zn, Ca, crude protein (CP), and energy, and the group supplemented with 40 or 80 mg/kg of organic Zn obtained significant effects (P < 0.05). Moreover, dietary supplementation with 40 or 80 mg/kg organic Zn increased the MT mRNA expression of the liver at week 72, whereas 20 mg/kg of organic Zn decreased it (P < 0.05). In conclusion, this study suggested that an optimum dietary (40 mg/kg) organic Zn level plays a key role in promoting the apparent retention of minerals and nutrients, trace element deposit, and MT mRNA expression.
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Affiliation(s)
- Y N Min
- College of Animal Science and Technology, Northwest A& F University, Yangling, Shaanxi 712100, China
| | - F X Liu
- College of Animal Science and Technology, Northwest A& F University, Yangling, Shaanxi 712100, China
| | - X Qi
- College of Animal Science and Technology, Northwest A& F University, Yangling, Shaanxi 712100, China
| | - S Ji
- College of Animal Science and Technology, Northwest A& F University, Yangling, Shaanxi 712100, China
| | - L Cui
- College of Animal Science and Technology, Northwest A& F University, Yangling, Shaanxi 712100, China
| | - Z P Wang
- College of Animal Science and Technology, Northwest A& F University, Yangling, Shaanxi 712100, China
| | - Y P Gao
- College of Animal Science and Technology, Northwest A& F University, Yangling, Shaanxi 712100, China
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20
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Zhang K, Cheng BH, Yang LL, Wang ZP, Zhang HL, Xu SS, Wang SZ, Wang YX, Zhang H, Li H. Identification of a potential functional single nucleotide polymorphism for fatness and growth traits in the 3'-untranslated region of the PCSK1 gene in chickens. J Anim Sci 2018; 95:4776-4786. [PMID: 29293721 DOI: 10.2527/jas2017.1706] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Prohormone convertase 1/3 is a serine endoprotease belonging to the subtilisin-like proprotein convertase family that is encoded by the () gene, and its major function is the processing and bioactivation of the proproteins of many kinds of neuroendocrine hormones, including insulin, cholecystokinin, and adrenocorticotropic hormone. The results of our previous genomewide association study indicated that the gene might be an important candidate gene for fatness traits in chickens. The objectives of this study were to investigate the tissue expression profiles of gene and to identify functional variants associated with fatness and growth traits in the chicken. The results indicated that mRNA was widely expressed in various tissues, especially neuroendocrine and intestinal tissues. Of these 2 tissue types, mRNA expression in lean males was significantly higher than in fat males. A SNP in the 3' untranslated region of (c.*900G > A) was identified. Association analysis in the Arbor Acres commercial broiler population and Northeast Agricultural University broiler lines divergently selected for abdominal fat content (NEAUHLF) population showed that the SNP c.*900G > A was associated with abdominal fat weight, abdominal fat percentage, BW, metatarsus length, and metatarsal circumference. In the 5th to 19th generation (G to G) of NEAUHLF, the allele frequency of c.*900G > A changed along with selection for abdominal fat content. At G, allele G of c.*900G > A was predominate in the lean line, whereas allele A was predominate in the fat line. Functional analysis demonstrated that allele A of c.*900G > A reduced mRNA stability and consequently downregulated gene expression. These results suggested that c.*900G > A was a functional SNP for fatness and growth traits in the chicken. The results of this study provide basic molecular information for the role of gene in avian growth and development, especially obesity.
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Wang Z, Wang Y, Wu RG, Wang ZP, Ramanujan RV. Label-Free Alignment of Nonmagnetic Particles in a Small Uniform Magnetic Field. J Nanosci Nanotechnol 2018; 18:634-644. [PMID: 29768889 DOI: 10.1166/jnn.2018.14704] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Label-free manipulation of biological entities can minimize damage, increase viability and improve efficiency of subsequent analysis. Understanding the mechanism of interaction between magnetic and nonmagnetic particles in an inverse ferrofluid can provide a mechanism of label-free manipulation of such entities in a uniform magnetic field. The magnetic force, induced by relative magnetic susceptibility difference between nonmagnetic particles and surrounding magnetic particles as well as particle-particle interaction were studied. Label-free alignment of nonmagnetic particles can be achieved by higher magnetic field strength (Ba), smaller particle spacing (R), larger particle size (rp1), and higher relative magnetic permeability difference between particle and the surrounding fluid (Rμr). Rμr can be used to predict the direction of the magnetic force between both magnetic and nonmagnetic particles. A sandwich structure, containing alternate layers of magnetic and nonmagnetic particle chains, was studied. This work can be used for manipulation of nonmagnetic particles in lab-on-a-chip applications.
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Affiliation(s)
- Zhaomeng Wang
- Department of Mechanical Engineering, National University of Singapore, 9 Engineering Drive 1, Singapore 117576, Singapore
| | - Ying Wang
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
| | - Rui Ge Wu
- Singapore Institute of Manufacturing Technology, 71 Nanyang Drive, Singapore 638075, Singapore
| | - Z P Wang
- Singapore Institute of Manufacturing Technology, 71 Nanyang Drive, Singapore 638075, Singapore
| | - R V Ramanujan
- School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
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22
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Wang ZP, Wang D, Wang CL, Xie WJ, Zhu YF, Chen XW. Transcriptome characterization of HPG axis from Chinese sea perch Lateolabrax maculatus. J Fish Biol 2017; 91:1407-1418. [PMID: 28913865 DOI: 10.1111/jfb.13459] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/25/2015] [Accepted: 08/15/2017] [Indexed: 06/07/2023]
Abstract
Here the transcriptome and differential gene expression in the adult brain and gonads of the Chinese sea perch Lateolabrax maculatus were reported. A total of 78 256 909 clean reads were generated from the adult brain, ovary and testis by using the Illumina HiSeq2000 platform and assembled into 274 909 contigs. A total of 31 683 unigenes were annotated based on sequence similarity and 20 702 unigenes were found to exhibit 8237 gene ontology terms and 3888 signal pathways. Transcripts of 26 623 unigenes were present in all of the tissues, whereas pairwise comparisons revealed that 671/367, 496/315 and 1668/580 unigenes were up-down regulated by at least two-fold between the brain and ovary, ovary and testis and brain and testis, respectively. Homology search led to the identification of reproduction-associated genes of the brain-gonad axis, including those involved in sex differentiation and maintenance. The data provided an integrated and comprehensive transcriptome resource for L. maculatus, which could be used for further research on hypothalamus-pituitary-gonad axis gene function, reproduction regulation and sex-biased gene expression.
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Affiliation(s)
- Z P Wang
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai, 201306, China
| | - D Wang
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai, 201306, China
| | - C L Wang
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai, 201306, China
| | - W J Xie
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai, 201306, China
| | - Y F Zhu
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai, 201306, China
| | - X W Chen
- Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai, 201306, China
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Varma VB, Wu RG, Wang ZP, Ramanujan RV. Magnetic Janus particles synthesized using droplet micro-magnetofluidic techniques for protein detection. Lab Chip 2017; 17:3514-3525. [PMID: 28936512 DOI: 10.1039/c7lc00830a] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Magnetic droplets on a microfluidic platform can act as micro-robots, providing wireless, remote, and programmable control. This field of droplet micro-magnetofluidics (DMMF) is useful for droplet merging, mixing and synthesis of Janus structures. Specifically, magnetic Janus particles (MJP) are useful for protein and DNA detection as well as magnetically controlled bioprinting. However, synthesis of MJP with control of the functional phases is a challenge. Hence, we developed a high flow rate, surfactant-free, wash-less method to synthesize MJP by integration of DMMF with hybrid magnetic fields. The effects of the flow rate, flow rate ratio, and hybrid magnetic field on the magnetic component of the Janus droplets and the MJP were investigated. It was found that the magnetization, particle size, and phase distribution inside MJP could be readily tuned by the flow rates and the magnetic field. The magnetic component in the MJP could be concentrated after mixing at flow rate ratio values less than 7.5 and flow rates less than 3 ml h-1. The experimental results and our simulations are in good agreement. The synthesized magnetic-fluorescent Janus particles were used for protein detection, with BSA as a model protein.
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Affiliation(s)
- V B Varma
- School of Materials Science and Engineering, Nanyang Technological University, 639798, Singapore.
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Alberti M, Dancik Y, Sriram G, Wu B, Teo YL, Feng Z, Bigliardi-Qi M, Wu RG, Wang ZP, Bigliardi PL. Multi-chamber microfluidic platform for high-precision skin permeation testing. Lab Chip 2017; 17:1625-1634. [PMID: 28396895 DOI: 10.1039/c6lc01574c] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
The established in vitro tool used for testing the absorption and penetration of chemicals through skin in pharmacology, toxicology and cosmetic science is the static Franz diffusion cell. While widespread, Franz cells are relatively costly, low-throughput and results may suffer from poor reproducibility. Microfluidics has the potential to overcome these drawbacks. In this paper, we present a novel microfluidic skin permeation platform and validate it rigorously against the Franz cell by comparing the transport of 3 model chemicals of varying lipophilicity: caffeine, salicylic acid and testosterone. Permeation experiments through silicone membranes show that the chip yields higher sensitivity in permeant cumulative amounts and comparable or lower coefficients of variation. Using a skin organotypic culture, we show that the chip decreases the effect of unstirred water layers that can occur in static Franz cells. The validation reported herein sets the stage for efficient skin permeation and toxicity screening and further development of microfluidic skin-on-chip devices.
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Affiliation(s)
- M Alberti
- Singapore Institute of Manufacturing Technology, A*STAR, 2 Fusionopolis Way, Level 10, Innovis, 138634 Singapore.
| | - Y Dancik
- Experimental Dermatology Laboratory, Institute of Medical Biology, A*STAR, 8a Biomedical Grove, #06-06, 138648 Singapore and Clinical Research Unit for Skin, Allergy and Regeneration, Institute of Medical Biology, A*STAR, 8a Biomedical Grove, #06-06, 138648 Singapore
| | - G Sriram
- Experimental Dermatology Laboratory, Institute of Medical Biology, A*STAR, 8a Biomedical Grove, #06-06, 138648 Singapore
| | - B Wu
- Singapore Institute of Manufacturing Technology, A*STAR, 2 Fusionopolis Way, Level 10, Innovis, 138634 Singapore.
| | - Y L Teo
- Clinical Research Unit for Skin, Allergy and Regeneration, Institute of Medical Biology, A*STAR, 8a Biomedical Grove, #06-06, 138648 Singapore
| | - Z Feng
- Singapore Institute of Manufacturing Technology, A*STAR, 2 Fusionopolis Way, Level 10, Innovis, 138634 Singapore.
| | - M Bigliardi-Qi
- Experimental Dermatology Laboratory, Institute of Medical Biology, A*STAR, 8a Biomedical Grove, #06-06, 138648 Singapore and Clinical Research Unit for Skin, Allergy and Regeneration, Institute of Medical Biology, A*STAR, 8a Biomedical Grove, #06-06, 138648 Singapore
| | - R G Wu
- Singapore Institute of Manufacturing Technology, A*STAR, 2 Fusionopolis Way, Level 10, Innovis, 138634 Singapore.
| | - Z P Wang
- Singapore Institute of Manufacturing Technology, A*STAR, 2 Fusionopolis Way, Level 10, Innovis, 138634 Singapore.
| | - P L Bigliardi
- Experimental Dermatology Laboratory, Institute of Medical Biology, A*STAR, 8a Biomedical Grove, #06-06, 138648 Singapore and Clinical Research Unit for Skin, Allergy and Regeneration, Institute of Medical Biology, A*STAR, 8a Biomedical Grove, #06-06, 138648 Singapore
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Wang HZ, Jin Y, Wang P, Han C, Wang ZP, Dong MY. Alteration of serum endocan in normal pregnancy and preeclampsia. CLIN EXP OBSTET GYN 2017; 44:419-422. [PMID: 29949285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
UNLABELLED Endocan is a novel marker for inflammation but its significance in preeclampsia remains unknown. OBJECTIVE The aims of this study were to delineate the changes of maternal endocan in normal pregnancy and preeclampsia and to explore its possible role in the pathogenesis of preeclampsia. MATERIALS AND METHODS Blood samples were taken from 42 non-pregnant women, from 43 normal pregnant women at third trimester, and from 41 preeclamptic women. Serum endocan levels were determined with enzyme-linked immunosorbent assay (ELISA) and compared among the groups. RESULTS There were no significant differences in serum endocan among non-pregnant women, normal pregnant women, and women with preeclampsia (X²= 2.207, p = 0.137) and there was no significant difference in serum endocan between women with mild and severe preeclampsia (Z= 0.368, p = 0. 713). The authors concluded that serum endocan did not change in pregnancy and preeclampsia, indicating endocan may not be involved in the pathogenesis of preeclampsia.
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Varma VB, Ray A, Wang ZM, Wang ZP, Ramanujan RV. Droplet Merging on a Lab-on-a-Chip Platform by Uniform Magnetic Fields. Sci Rep 2016; 6:37671. [PMID: 27892475 PMCID: PMC5124862 DOI: 10.1038/srep37671] [Citation(s) in RCA: 54] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2016] [Accepted: 11/01/2016] [Indexed: 02/07/2023] Open
Abstract
Droplet microfluidics offers a range of Lab-on-a-chip (LoC) applications. However, wireless and programmable manipulation of such droplets is a challenge. We address this challenge by experimental and modelling studies of uniform magnetic field induced merging of ferrofluid based droplets. Control of droplet velocity and merging was achieved through uniform magnetic field and flow rate ratio. Conditions for droplet merging with respect to droplet velocity were studied. Merging and mixing of colour dye + magnetite composite droplets was demonstrated. Our experimental and numerical results are in good agreement. These studies are useful for wireless and programmable droplet merging as well as mixing relevant to biosensing, bioassay, microfluidic-based synthesis, reaction kinetics, and magnetochemistry.
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Affiliation(s)
- V B Varma
- School of Materials Science and Engineering, Nanyang Technological University, 639798, Singapore
| | - A Ray
- School of Materials Science and Engineering, Nanyang Technological University, 639798, Singapore
| | - Z M Wang
- School of Materials Science and Engineering, Nanyang Technological University, 639798, Singapore
| | - Z P Wang
- Singapore Institute of Manufacturing Technology, 71 Nanyang Dr, 638075, Singapore
| | - R V Ramanujan
- School of Materials Science and Engineering, Nanyang Technological University, 639798, Singapore
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Wang ZP, Zhao M, Qu QS, Miao SZ. Effect of pregnane X receptor polymorphisms on tacrolimus blood concentrations and the resulting adverse reactions in kidney transplantation recipients. Genet Mol Res 2016; 15:gmr8464. [PMID: 27706725 DOI: 10.4238/gmr.15038464] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
We investigated the effect of pregnane X receptor (PXR) polymorphisms on tacrolimus (FK506) blood trough concentrations and the associated adverse reactions in kidney transplantation recipients (KTRs). Polymerase chain reaction (PCR)-restriction fragment length polymorphism was used to detect the genotypes of single nucleotide polymorphism loci in 336 KTRs. The PXR six-base deletion mutation was classified using specific allele PCR, and the FK506 blood trough concentration in the KTRs was measured by chemiluminescent microparticle immunoassay. There were significant differences in adverse reactions resulting from FK506 in age, weight, body mass index (BMI) and treatment course (P < 0.05). Logistical regression revealed that the FK506 treatment course and BMI were risk factors for hyperlipidemia, and the risk of hyperlipidemia increased 27.534 times when the BMI was less than 18.5. Moreover, age was also a risk factor leading to hyperglycemia. FK506 blood trough concentration and C0/D value had an impact on adverse reactions induced by hyperglycemia. The KTRs' PXR rs3842689, rs6785049, and rs1523127 mutation frequencies were 26.07, 11.79, and 16.07%, respectively. There was no statistically significant difference in the mutation frequency of each locus between the control group and the adverse reaction groups. Therefore, rs3842689, 7635G>A (rs6785049), and 24381C>A (rs1523127) PXR polymorphisms have no obvious impact on FK506; furthermore, the PXR rs3842689 wild-type homozygous WW genotype is a risk factor of FK506 and results in gastrointestinal reactions.
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Affiliation(s)
- Z P Wang
- Renal Transplantation Department of Zhengzhou People's Hospital, Zhengzhou, Henan, China
| | - M Zhao
- Zhengzhou Shuqing Medical College, Zhengzhou, Henan, China
| | - Q S Qu
- Renal Transplantation Department of Zhengzhou People's Hospital, Zhengzhou, Henan, China
| | - S Z Miao
- Renal Transplantation Department of Zhengzhou People's Hospital, Zhengzhou, Henan, China
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Rong EG, Yang H, Zhang ZW, Wang ZP, Yan XH, Li H, Wang N. Association of methionine synthase gene polymorphisms with wool production and quality traits in Chinese Merino population. J Anim Sci 2016; 93:4601-9. [PMID: 26523551 DOI: 10.2527/jas.2015-8963] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Methionine synthase (MTR) plays a crucial role in maintaining homeostasis of intracellular methionine, folate, and homocysteine, and its activity correlates with DNA methylation in many mammalian tissues. Our previous genomewide association study identified that 1 SNP located in the gene was associated with several wool production and quality traits in Chinese Merino. To confirm the potential involvement of the gene in sheep wool production and quality traits, we performed sheep tissue expression profiling, SNP detection, and association analysis with sheep wool production and quality traits. The semiquantitative reverse transcription PCR analysis showed that the gene was differentially expressed in skin from Merino and Kazak sheep. The sequencing analysis identified a total of 13 SNP in the gene from Chinese Merino sheep. Comparison of the allele frequencies revealed that these 13 identified SNP were significantly different among the 6 tested Chinese Merino strains ( < 0.001). Linkage disequilibrium analysis showed that SNP 3 to 11 were strongly linked in a single haplotype block in the tested population. Association analysis showed that SNP 2 to 11 were significantly associated with the average wool fiber diameter and the fineness SD and that SNP 4 to 11 were significantly associated with the CV of fiber diameter trait ( < 0.05). Single nucleotide polymorphism 2 and SNP 5 to 12 were weakly associated with wool crimp. Similarly, the haplotypes derived from these 13 identified SNP were also significantly associated with the average wool fiber diameter, fineness SD, and the CV of fiber diameter ( < 0.05). Our results suggest that is a candidate gene for sheep wool production and quality traits, and the identified SNP might be used in sheep breeding.
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Wang Q, Song YH, Tang Z, Wang ZP, Xu Q, Bao N. Effects of ganglioside GM1 and neural growth factor on neural stem cell proliferation and differentiation. Genet Mol Res 2016; 15:gmr8376. [PMID: 27525911 DOI: 10.4238/gmr.15038376] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Neurogenesis, recovery from nerve injury, neurodegeneration, and Parkinson's disease affect people's health, yet the underlying molecular mechanisms remain elusive. Here, we investigated the effect of ganglioside GM1 and neural growth factor (NGF) on neural stem cell (NSC) proliferation and differentiation in vitro to provide a scientific basis for comprehensive treatment of nervous system diseases via NSC application. As widely applied methods of relatively high accuracy, cell counts and 3-(4,5-dimethyl-2-thiazolyl)-2,5-diphenyl-2-H-tetrazolium bromide (MTT) assays were used to assess NSC proliferation. In addition, western blotting was employed to determine NSC differentiation. Cell counts and MTT assays demonstrated that in epidermal growth factor (EGF)- and basic fibroblast growth factor (bFGF)-containing medium, a high concentration of GM1, but not NGF, significantly elevated NSC proliferation. In NSC cultures lacking EGF and bFGF, cell counts and MTT values were significantly increased compared to those in the negative control group on days 4, 7, and 10 after GM1 (25, 100, and 200 ng/mL) but not NGF (25, 50, 100, and 200 ng/mL) treatment. Western blotting revealed significantly increased expression of nestin (an NSC marker) in NSCs treated with GM1, and upregulation of glial fibrillary acidic protein (a glial cell marker) and neuron-specific enolase (a neuron marker) in those administered NGF. Our results suggest that GM1 and NGF induce NSC proliferation and differentiation, respectively, in a dose-dependent manner.
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Affiliation(s)
- Q Wang
- Pediatric Department, Shanghai First People's Hospital, Shanghai, China
| | - Y H Song
- Neurosurgery Department, Shanghai Children's Medical Center Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Z Tang
- College of Mechanical Engineering, Donghua University, Shanghai, China
| | - Z P Wang
- Neurosurgery Department, Shanghai Children's Medical Center Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Q Xu
- Scientific Research Center, Shanghai Xinhua Hospital, Shanghai, China
| | - N Bao
- Neurosurgery Department, Shanghai Children's Medical Center Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, China
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You CG, Yin YS, Xie XD, Ju J, Wang ZP, Chen YR. Sex Influences on the Penetrance of IL-1β and IL-1RN Genotypes for Rheumatoid Arthritis in the Chinese Population. J Int Med Res 2016; 35:323-8. [PMID: 17593860 DOI: 10.1177/147323000703500306] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Polymorphism (variable number of tandem repeats) in the second intron of the interleukin-1 receptor antagonist ( IL-1Ra) gene and two single nucleotide polymorphisms at positions −511 and +3954 of the IL-1β gene may be associated with an increased risk of rheumatoid arthritis (RA). This study used sex stratification to investigate a correlation of the three genetic polymorphisms with the risk of RA, on patients with RA and healthy controls. Polymerase chain reaction (PCR) and polymerase chain reaction–restriction fragment length polymorphism (PCR–RFLP) were performed. The frequencies of the IL-1β+ 3954 allele and genotype in female patients were significantly different compared with the controls; but in males, only the frequency of the IL-1β+ 3954 allele was different. The frequency of the IL-1RN genotype in patients was not statistically different compared with the controls; however, the frequency of IL-1RN allele in female patients was different. The association of the three polymorphisms with the susceptibility to RA appears to be significantly affected by gender.
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Affiliation(s)
- C G You
- School of Life Sciences, Lanzhou University, Lanzhou City, China
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Wang X, Song ZG, Huang DX, Gao H, Wang Q, Wang ZP. A single nucleotide polymorphism in GABAA receptor isoforms is potentially responsible for isoflurane sensitivity in mice. Genet Mol Res 2016; 15:gmr7340. [PMID: 27323147 DOI: 10.4238/gmr.15027340] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
GABAA receptors are chloride channels in the brain that are activated by binding with g-aminobutyric acid (GABA). The cDNA sequences of GABAA receptor subunits from two strains of mice with different sensitivities to isoflurane were compared to identify nucleotide mutations. Included 80 mice from two strains with different sensitivities to isoflurane on C57BL/6 background. Forty mice were from an isoflurane-sensitive strain (S group) and 40 mice were from a resistant strain (R group). RNA was extracted from brains of the mice, and cDNA were reverse transcribed using AMV reverse transcriptase. The amplified products were processed, sequenced, and analyzed for differences between the two strains. Chi-square analysis was performed to compare differences in nucleotide mutation frequencies between the two strains. No differences were identified in the α1-6, β2, β3, or γ1-3 nucleotide sequences and no single nucleotide polymorphisms were found in the comparison with the GenBank sequence for the GABAA receptor subunit. A single nucleotide polymorphism (SNP) at the nucleotide position 462 (C/G) in the β1 sequence was found. This SNP was observed in 5 mice from the sensitive strain and in 36 mice from the resistant strain. The Fischer exact test (P < 0.01) was used to compare two strains of mice for SNP in the cDNA sequence of the β1 subunit. Additional studies are required to understand whether the GABAA receptor is a specific target of inhaled anesthetic action or whether the identified SNP affects the action of the volatile anesthetic.
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Affiliation(s)
- X Wang
- Department of Anesthesiology, Wuxi People's Hospital of Nanjing Medical University, Wuxi, China
| | - Z G Song
- Department of Anesthesiology, Wuxi People's Hospital of Nanjing Medical University, Wuxi, China
| | - D X Huang
- Department of Anesthesiology, Wuxi People's Hospital of Nanjing Medical University, Wuxi, China
| | - H Gao
- Department of Anesthesiology, Wuxi People's Hospital of Nanjing Medical University, Wuxi, China
| | - Q Wang
- Department of Anesthesiology, Wuxi People's Hospital of Nanjing Medical University, Wuxi, China
| | - Z P Wang
- Department of Anesthesiology, Wuxi People's Hospital of Nanjing Medical University, Wuxi, China
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Abstract
A suspension of non-magnetic entities in a ferrofluid is referred to as an inverse ferrofluid. Current research to trap non-magnetic entities in an inverse ferrofluid focuses on using large permanent magnets to generate high magnetic field gradients, which seriously limits Lab-on-a-Chip applications. On the other hand, in this work, trapping of non-magnetic entities, e.g., bacteria in a uniform external magnetic field was studied with a novel chip design. An inverse ferrofluid flows in a channel and a non-magnetic island is placed in the middle of this channel. The magnetic field was distorted by this island due to the magnetic susceptibility difference between this island and the surrounding ferrofluid, resulting in magnetic forces applied on the non-magnetic entities. Both the ferromagnetic particles and the non-magnetic entities, e.g., bacteria were attracted towards the island, and subsequently accumulate in different regions. The alignment of the ferrimagnetic particles and optical transparency of the ferrofluid was greatly enhanced by the bacteria at low applied magnetic fields. This work is applicable to lab-on-a-chip based detection and trapping of non-magnetic entities bacteria and cells.
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Affiliation(s)
- Z M Wang
- School of Materials Science and Engineering, Nanyang Technological University 50 Nanyang Avenue, Singapore 639798, Singapore
| | - R G Wu
- Singapore Institute of Manufacturing Technology, 71 Nanyang Drive, Singapore 638075, Singapore
| | - Z P Wang
- Singapore Institute of Manufacturing Technology, 71 Nanyang Drive, Singapore 638075, Singapore
| | - R V Ramanujan
- School of Materials Science and Engineering, Nanyang Technological University 50 Nanyang Avenue, Singapore 639798, Singapore
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Liang MJ, Wang ZP, Xu L, Leng L, Wang SZ, Luan P, Cao ZP, Li YM, Li H. Estimating the genetic parameters for liver fat traits in broiler lines divergently selected for abdominal fat. Genet Mol Res 2015; 14:9646-54. [PMID: 26345897 DOI: 10.4238/2015.august.14.27] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Intensive selection of broilers for improved growth rate is known to exert a negative effect on broiler health, such as an increase in body fat (and its related diseases). Excessive fat deposition in the liver can cause fatty liver hemorrhagic syndrome (FLHS); in addition, traits associated with liver fat have also been associated with FLHS. This study explored the genetic relationships among liver fat-related traits. Data was collected from 462 birds derived from 16th generation Northeast Agricultural University broiler lines divergently selected for abdominal fat content. The body weight at 7 weeks of age (BW7), abdominal fat weight (AFW), abdominal fat percentage, liver fat percentage (LFP), liver weight, and liver percentage were measured. The heritability of these traits and the phenotypic and genetic correlations were estimated, using the restricted maximum likelihood (REML) and Gibbs sampling (GS) methods. The REML and GS methods yielded similar heritability estimates for LFP (0.36 and 0.37, respectively). BW7 showed a high positive genetic correlation with AFW (rA(REML) = 0.74 and rA(GS) = 0.80), and a moderate positive genetic correlation with LFP (rA(REML) = 0.27 and rA(GS) = 0.39). Positive genetic correlations were also observed between AFW and LFP (rA(REML) = 0.35 and rA(GS) = 0.36). These results suggested that selection for growth may increase the AFW and LFP in broilers. LFP is directly related to FLHS; therefore, selection for broiler growth rate may increase the incidence of FLHS.
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Affiliation(s)
- M J Liang
- Key Laboratory of Chicken Genetics and Breeding, Ministry of Agriculture, Harbin, China
| | - Z P Wang
- Key Laboratory of Chicken Genetics and Breeding, Ministry of Agriculture, Harbin, China
| | - L Xu
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, China
| | - L Leng
- Key Laboratory of Chicken Genetics and Breeding, Ministry of Agriculture, Harbin, China
| | - S Z Wang
- Key Laboratory of Chicken Genetics and Breeding, Ministry of Agriculture, Harbin, China
| | - P Luan
- Key Laboratory of Chicken Genetics and Breeding, Ministry of Agriculture, Harbin, China
| | - Z P Cao
- Key Laboratory of Chicken Genetics and Breeding, Ministry of Agriculture, Harbin, China
| | - Y M Li
- Key Laboratory of Chicken Genetics and Breeding, Ministry of Agriculture, Harbin, China
| | - H Li
- Key Laboratory of Chicken Genetics and Breeding, Ministry of Agriculture, Harbin, China
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Liu SK, Niu ZY, Min YN, Wang ZP, Zhang J, He ZF, Li HL, Sun TT, Liu FZ. Effects of dietary crude protein on the growth performance, carcass characteristics and serum biochemical indexes of Lueyang black-boned chickens from seven to twelve weeks of age. Rev Bras Cienc Avic 2015. [DOI: 10.1590/1516-635x1701103-108] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
- SK Liu
- Northwest A & F University, China
| | - ZY Niu
- Northwest A & F University, China
| | - YN Min
- Northwest A & F University, China
| | - ZP Wang
- Northwest A & F University, China
| | - J Zhang
- Northwest A & F University, China
| | - ZF He
- Northwest A & F University, China
| | - HL Li
- Northwest A & F University, China
| | - TT Sun
- Northwest A & F University, China
| | - FZ Liu
- Northwest A & F University, China
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Xu Z, Wang ZP, Ou JS, Yin SL, Liu LJ, Zhang X. Is low anticoagulation intensity more beneficial for patients with bileaflet mechanical mitral valves? a meta-analysis. J Cardiovasc Surg (Torino) 2014:R37Y9999N00A140242. [PMID: 25323107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
AIM For the mitral valve replacement(MVR) patients using the lowest thrombogenic risk bileaflet valves (St. Jude Medical, Carbomedics and On-X Prosthetic Heart Valve), excellent results can be achieved by adopting the anticoagulation intensity(median INR<2.5)which is lower than the recommended intensity(INR:2.5~3.5). Our aim was to provide a pooled estimate of potential benefit from clinical studies using low anticoagulation intensity and high intensity in these patients. METHODS Relevant studies published before Feb. 2014 were searched through a number of digital databases(MEDLINE, EMBASE, Cochrane Library, etc.). They were pooled by SPSS19.0 using the random effect method in three fields: occurrence rate of major thromboembolism, major hemorrhage and major total events. RESULTS 14 studies with 3595 patients were included. The follow-up period was 12846.6 patient*year. Pooled estimates indicated reduction in major hemorrhage (RR: 0.420, 95%CI: 0.296~0.595, P<0.001) and major total events(RR: 0.738, 95%CI: 0.604~0.902, P=0.003) in the low intensity group. No difference was noted in major thromboembolism(RR: 1.045, 95%CI: 0.814~1.341, P=0.75). CONCLUSION Compared with the recommended high intensity, low anticoagulation intensity (median INR<2.5) may be more beneficial for the MVR patients using the lowest thrombogenic risk bileaflet valves. We recommended an INR between 2.0 and 2.5, with a median INR of 2.3 for these MVR patients.
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Affiliation(s)
- Z Xu
- . Division of Cardiac Surgery, the First Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong, P.R.China -
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Lv TT, Zhu Z, Shi JH, Guan CY, Wang ZP, Cui TJ. Optically controlled background-free terahertz switching in chiral metamaterial. Opt Lett 2014; 39:3066-3069. [PMID: 24978275 DOI: 10.1364/ol.39.003066] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
We demonstrate a multiband background-free terahertz (THz) switch in photoactive chiral metamaterial using polarization conversion. Orthogonal arrangement of two asymmetrical split-ring apertures allows a high polarization conversion efficiency and low copolarization transmission. The chiral metamaterial embedded with photoactive silicon promises a dynamic control on cross-polarization transmission and thus enables an efficient background-free THz switch. The on/off state of THz metamaterial switching can be efficiently controlled by an optical pump. The realization of a cross-polarization THz switch provides a new mechanism of mode switching to control THz wave propagation and will be a promising candidate for polarization devices.
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Abstract
In this study, we report a robust agitation method for small-volume liquids. It utilizes an elastic diaphragm as the bottom of a liquid chamber, upon which an initial tension is also applied to enhance the aeroelasticity effects at small/micro scales. As a result, spontaneous vibration of the diaphragm can be induced by an external air flow, which further provides fluid agitations. The device structure is simple and can be easily fabricated at low cost. More importantly, the vibration amplitude is controllable and varies widely from several tens to several hundred micrometers depending on the applied air pressure. The resulting agitation is effective and applicable at high viscosities of up to 900 cSt. The influences of air pressure and liquid viscosity on the vibration frequency are discussed. Potential applications of this technique for solid particle agitation, focusing and fluid mixing are also demonstrated.
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Affiliation(s)
- H M Xia
- Singapore Institute of Manufacturing Technology, 71 Nanyang drive,, Singapore 638075.
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Guo HY, Hu XM, Han DD, Wang ZP, Meng L. Lipid peroxidation and antioxidant status in vagina microenvironment of patients with several common vaginitis. CLIN EXP OBSTET GYN 2013; 40:331-336. [PMID: 24283159] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
OBJECTIVE Oxidative stress has been suggested to play an important role in many diseases, including vaginitis. To evaluate oxidative biomarkers in the secretion of cervix samples of vaginitis, this study will illustrate the status of lipid peroxidation and antioxidant status in vaginal microenvironment. MATERIALS AND METHODS A total of 257 patients with vaginitis, including candida vaginitis, bacterial vaginosis, and trichomonas vaginitis were involved in this study. Cervico-vaginal fluid was collected from these patients before and after treatment, and the malondialdehyde (MDA), catalase (CAT), superoxide dismutase (SOD), hydrogen peroxide (H2O2), and vitamin C levels were measured by enzyme-linked immunosorbent assay (ELISA). RESULTS The results revealed that the MDA and H2O2 levels were increased in the vaginitis patients, while there was no significant difference in MDA level among different kinds of vaginitis before treatment. The CAT and vitamin C levels in vaginitis were decreased before treatment. Moreover, the data also showed that the MDA and H2O2 levels were decreased, while the CAT, SOD, and vitamin C levels were increased after received treatment, respectively, and there was no significant difference between controls and vaginitis. CONCLUSION This study indicated that oxidative stress played an important role in vaginitis.
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Affiliation(s)
- H Y Guo
- Department of Urology, The Second Hospital of Lanzhou University, Lanzhou, China
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Wang SZ, Hu XX, Wang ZP, Li XC, Wang QG, Wang YX, Tang ZQ, Li H. Quantitative trait loci associated with body weight and abdominal fat traits on chicken chromosomes 3, 5 and 7. Genet Mol Res 2012; 11:956-65. [PMID: 22576922 DOI: 10.4238/2012.april.19.1] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Body weight and abdominal fat traits in meat-type chickens are complex and economically important factors. Our objective was to identify quantitative trait loci (QTL) responsible for body weight and abdominal fat traits in broiler chickens. The Northeast Agricultural University Resource Population (NEAURP) is a cross between broiler sires and Baier layer dams. We measured body weight and abdominal fat traits in the F(2) population. A total of 362 F(2) individuals derived from four F(1) families and their parents and F(0) birds were genotyped using 29 fluorescent microsatellite markers located on chromosomes 3, 5 and 7. Linkage maps for the three chromosomes were constructed and interval mapping was performed to identify putative QTLs. Nine QTL for body weight were identified at the 5% genome-wide level, while 15 QTL were identified at the 5% chromosome-wide level. Phenotypic variance explained by these QTL varied from 2.95 to 6.03%. In particular, a QTL region spanning 31 cM, associated with body weight at 1 to 12 weeks of age and carcass weight at 12 weeks of age, was first identified on chromosome 5. Three QTLs for the abdominal fat traits were identified at the 5% chromosome-wide level. These QTLs explained 3.42 to 3.59% of the phenotypic variance. This information will help direct prospective fine mapping studies and can facilitate the identification of underlying genes and causal mutations for body weight and abdominal fat traits.
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Affiliation(s)
- S Z Wang
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, PR China
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Wu K, Hao LZ, Yu HH, Wang ZP, Wang JY, Zhang HJ. Thermal and laser properties of Nd:Lu₃Sc₁.₅Ga₃.₅O₁₂ for high power dual-wavelength laser. Opt Express 2012; 20:6944-6951. [PMID: 22453372 DOI: 10.1364/oe.20.006944] [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] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We measured the thermal properties of Nd:Lu₃Sc₁.₅Ga₃.₅O₁₂ (Nd:LuSGG) crystal, including the thermal expansion coefficient, specific heat, and thermal diffusion coefficient. The calculated thermal conductivity is 4.4 W/mK at room temperature. A high-power continuous-wave and passively Q-switched Nd:LuSGG laser was also demonstrated. Continuous-wave output power of 6.96 W is obtained which is the highest power with this material. For the first time to our knowledge, the passively Q-switched Nd:LuSGG laser is reported with the shortest pulse width, largest pulse energy, and highest peak power are achieved to be 5.1 ns, 62.5 μJ, and 12 kW, respectively. By spectral analysis, it has been found that the Nd:LuSGG laser was located at 1059 nm under low pump power, and became dual-wavelength at 1061.5 and 1059 nm when the incident pump power is over 2.27 W. The generating mechanism of dual-wavelength laser is also discussed.
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Affiliation(s)
- K Wu
- State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
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Wang ZP, Yang C. Preface to special topic: selected papers from the second conference on advances in microfluidics and nanofluidics and Asia-pacific international symposium on lab on chip. Biomicrofluidics 2012; 6:12701-127012. [PMID: 22662068 PMCID: PMC3365320 DOI: 10.1063/1.3692256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2012] [Indexed: 06/01/2023]
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Pan ZB, Yao B, Yu HH, Xu HH, Wang ZP, Wang JY, Zhang HJ. Growth and characterization of self-Q-switched Nd:Cr:YVO4 crystal. Opt Express 2012; 20:2178-2183. [PMID: 22330458 DOI: 10.1364/oe.20.002178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A Nd:Cr:YVO4 crystal was grown by the Czochralski method for the first time to our knowledge. Its structure and cell parameter have been studied by X-ray powder diffraction (XRPD) analysis. Polarized absorption spectra were measured at room temperature, which showed that the absorption bands display polarization character and an absorption band of Cr5+ ions at 1110 nm enables the crystal to be a self-Q-switched laser material. We also found that the absorption of Cr5+ ions became much larger and its self-Q-switched laser performance became much better when the Nd:Cr:YVO4 crystal was annealed because the annealing induces more Cr ions to become those with + 5 valence. In the self-Q-switched laser, the maximum output power, shortest pulse width, and largest pulse energy were obtained to be 120 mW, 85.8 ns, and 0.79 μJ, respectively.
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Affiliation(s)
- Z B Pan
- State Key Laboratory of Crystal Materials and Institute of Crystal Materials, Shandong University, Jinan 250100, China
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Xia HM, Wang ZP, Fan W, Wijaya A, Wang W, Wang ZF. Converting steady laminar flow to oscillatory flow through a hydroelasticity approach at microscales. Lab Chip 2012; 12:60-4. [PMID: 22048176 DOI: 10.1039/c1lc20667b] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
We report a hydroelasticity-based microfluidic oscillator that converts otherwise steady laminar flow to oscillatory flow. It incorporates an elastic diaphragm to enhance nonlinearity of the flow. Negative differential flow resistance is observed. High-frequency oscillatory flow is produced passively through interactions among hydrodynamic, elastic and inertial forces, without resorting to external actuators and control equipment. Driven by fluid flow and pressure, this device can operate in either steady laminar flow or oscillatory flow states, or work as a valve. Its applications for flow control and operation, and mixing enhancement are demonstrated.
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Affiliation(s)
- H M Xia
- Singapore Institute of Manufacturing Technology, 71 Nanyang drive, Singapore 638075.
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Zhang CC, Zhang ZM, Dai RC, Wang ZP, Ding ZJ. High pressure luminescence and Raman studies on the phase transition of Gd2O3:Eu3+ nanorods. J Nanosci Nanotechnol 2011; 11:9887-9891. [PMID: 22413315 DOI: 10.1166/jnn.2011.5228] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The cubic Gd2O3:Eu3+ nanorods were synthesized by a hydrothermal method. The SEM image indicated the nanorods with diameter of 30-35 nm and length of 200-500 nm. The structural stability of Gd2O3:Eu3+ nanorods was investigated by in situ high pressure luminescence and Raman spectra up to 18.9 GPa at room temperature. The results reveals a pressure-induced phase transition from cubic to hexagonal structure at about 11.3 GPa. After releasing pressure, the part of hexagonal structure is retained and the other transfers to monoclinic phase.
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Affiliation(s)
- C C Zhang
- Hefei National Laboratory for Physical Sciences at Microscale and Department of Physics, University of Science and Technology of China, Hefei, Anhui 230026, China
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Wang ZP, Liu RF, Wang AR, Li JY, Deng XM. Expression and activity analysis reveal that heme oxygenase (decycling) 1 is associated with blue egg formation. Poult Sci 2011; 90:836-41. [PMID: 21406370 DOI: 10.3382/ps.2010-01143] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Biliverdin is responsible for the coloration of blue eggs and is secreted onto the eggshell by the shell gland. Previous studies confirmed that a significant difference exists in biliverdin content between blue eggs and brown eggs, although the reasons are still unknown. Because the pigment is derived from oxidative degradation of heme catalyzed by heme oxygenase (HO), this study compared heme oxygenase (decycling) 1 (HMOX1), the gene encoding HO expression and HO activity, in the shell glands of the Dongxiang blue-shelled chicken (n = 12) and the Dongxiang brown-shelled chicken (n = 12). Results showed that HMOX1 was highly expressed at the mRNA (1.58-fold; P < 0.05) and protein levels in blue-shelled chickens compared with brown-shelled chickens. At the functional level, blue-shelled chickens also showed 1.40-fold (P < 0.05) higher HO activity than brown-shelled chickens. To explore the reasons for the differential expression of HMOX1, an association study of 6 SNP capturing the majority of HMOX1 variants with the blue egg coloration was performed. Results showed no significant association between SNP and the blue egg coloration in HMOX1 (P > 0.05). Taken together, these results show that blue egg formation is associated with high expression of HMOX1 in the shell gland of Dongxiang blue-shelled chickens, and suggest that differential expression of HMOX1 in the 2 groups of chickens is most likely to arise from an alteration in the trans-acting factor.
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Affiliation(s)
- Z P Wang
- National Engineering Laboratory for Animal Breeding and the Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, China Agricultural University, Beijing, 100193, China
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Abstract
Increased disease resistance through improved general immune capacity would be beneficial for the welfare and productivity of farm animals. Cytokines are essential diagnostic parameters in veterinary practice. To identify quantitative trait loci (QTL) for cytokine levels in serum in the pig, Interferon-gamma (IFN-γ) and Interleukin 10 (IL-10) levels and the ratio of IFN-γ to IL-10 were measured in a composite pig population, before and after challenge with modified live CSF (classical swine fever) vaccine. Through interval mapping using the variance component approach and the permutation test, 11 QTL (five for IFN-γ, two for IL-10 and four for the ratio of IFN-γ to IL-10) with significance levels of P < 0.10 were identified, of which five were significant at the P < 0.05 level. The most significant QTL (P < 0.01) was found on chromosome 16, with effect on the ratio of IFN-γ to IL-10. Within these QTL regions, a number of known genes were revealed and their potential relationships to the studied traits were discussed. Some of these genes may serve as candidate genes for these traits in swine.
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Affiliation(s)
- X Lu
- Key Laboratory Animal Genetics and Breeding of the Ministry of Agricultural, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
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Hu G, Wang SZ, Wang ZP, Li YM, Li H. Genetic epistasis analysis of 10 peroxisome proliferator-activated receptor γ-correlated genes in broiler lines divergently selected for abdominal fat content. Poult Sci 2010; 89:2341-50. [PMID: 20952696 DOI: 10.3382/ps.2010-00857] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Chicken peroxisome proliferator-activated receptor γ (PPARγ), which is highly expressed in adipose tissues, is a key factor in fat accumulation in the abdominal fat pad. In this study, association and pairwise epistasis analyses were performed for all the polymorphisms detected in PPARγ and for 9 genes from PPARγ-correlated lipid metabolic pathways for abdominal fat weight (AFW) in 10th-generation populations of Northeast Agricultural University broiler lines divergently selected for abdominal fat content. Epistatic networks were then reconstructed with the identified epistatic effects. Single-marker association analyses showed that 5 of the 20 screened polymorphisms were significantly associated with AFW (P < 0.05), and CCAAT/enhancer-binding protein α (C/EBPα) c.552G>A was 1 of the 5 significant loci. Pairwise interaction analyses showed that 15 pairs of polymorphisms reached a significance level of P < 2.64 × 10(-4) (adjusted by Bonferroni correction) in the lean line, 41 pairs reached significance in the fat line, and 7 pairs reached significance in both lines. Interestingly, many other loci interacted with C/EBPα c.552G>A in both lines. In epistatic network analyses, C/EBPα c.552G>A seemed to behave as a hub for the epistatic network in both lines. All these results revealed that the genetic architecture of C/EBPα c.552G>A for AFW seemed to be an apparent individual main-effect QTL but that it could be dissected into a genetic epistatic network. Our results suggest that C/EBPα c.552G>A might be the most important locus contributing to phenotypic variation in AFW among all the polymorphisms detected in this study.
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Affiliation(s)
- G Hu
- College of Animal Science and Technology, Northeast Agricultural University, Harbin, 150030, P. R. China
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Wang ZP, Kurahashi M, Suzuki T, Ding ZJ, Yamauchi Y. Silicon micro/nanofabrication using metastable helium atom beam lithography. J Nanosci Nanotechnol 2010; 10:7443-7446. [PMID: 21137955 DOI: 10.1166/jnn.2010.2853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
We utilize metastable helium (He*) atom beam lithography to pattern silicon substrates by using self-assembled monolayer (SAM) of octadecyltrichlorosilane (OTS) grown directly on silicon surface as resist. An improved wet-chemical etching method was used to transfer the resist pattern into silicon substrate. Negative and positive pattern formations with well-defined edges were observed for silicon(100) substrate with SAM after exposure to the He* atom beam followed by the etching. Results indicate a clear transition from positive to negative patterns relies on the He* dosage. The pattern sizes on silicon were successfully decreased to the order of 100 nm, even less than 50 nm.
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Affiliation(s)
- Z P Wang
- National Institute for Materials Science, Japan, Ibaraki 305-0047, Japan
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Xia HM, Wang ZP, Koh YX, May KT. A microfluidic mixer with self-excited 'turbulent' fluid motion for wide viscosity ratio applications. Lab Chip 2010; 10:1712-6. [PMID: 20422105 DOI: 10.1039/b925025e] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
In micromixer studies, compared with the design, modeling and characterization, the influence of the fluid properties on mixing has been less discussed. This topic is of practical significance as the properties of diverse biological and chemical liquids to be mixed have large variations. Here, we report a microfluidic mixer for mixing fluids with widely different viscosities. It contains an interconnected multi-channel network through which the bulk fluid volumes are divided into smaller ones and chaotically reorganized. Then, the multiple fluid streams are driven into an expansion chamber which triggers viscous flow instabilities. Experiments with the co-flow of glycerol and aqueous solutions show an automatic transition of the flow from a steady state to a 'turbulent' state, significantly enhancing the mixing. This observation is rather interesting considering that it occurs in a passive flow and the average Reynolds number involved is small. Further testing indicates that this mixer works well at viscosity ratio (chi) up to the order of 10(4).
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Affiliation(s)
- H M Xia
- Singapore Institute of Manufacturing Technology, 71 Nanyang Drive, Singapore 638075
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Yu YG, Wang JY, Zhang HJ, Wang ZP, Yu HH, Sun SQ, Xia HR, Jiang MH. Thermal characterization of lowly Nd3+ doped disordered Nd:CNGG crystal. Opt Express 2009; 17:9270-9275. [PMID: 19466178 DOI: 10.1364/oe.17.009270] [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] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Thermal properties of a lowly Nd(3+)-doped disordered Nd:CNGG crystal have been symmetrically investigated. At room temperature, the specific heat, thermal diffusion coefficient and density were determined to be 0.595 J/g.K, 1.223 mm(2)/s and 4.718 g/cm(3), corresponding the thermal conductivity of 3.43 W/m.K. By measuring the thermal lens at different pump power, the thermal-optical coefficient was calculated to be 9.2x10(-6) K(-1) for the first time to our knowledge. All the thermal properties recovered that this material can be used in the moderate and even high pump power.
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Affiliation(s)
- Y G Yu
- State Key Laboratory of Crystal Materials, Shandong University, Jinan, 250100, PR China
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