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Chen RX, Liu XN, Xu Y, Shi YJ, Wang MQ, Shao C, Huang H, Xu K, Wang MZ, Xu ZJ. [Clinical features and prognostic analysis of checkpoint inhibitor pneumonitis in patients with non-small cell lung cancer]. Zhonghua Jie He He Hu Xi Za Zhi 2024; 47:207-213. [PMID: 38448169 DOI: 10.3760/cma.j.cn112147-20231003-00210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Abstract
Objective: To describe the clinical characteristics of patients with non-small cell lung cancer (NSCLC) who developed checkpoint inhibitor pneumonitis (CIP) and to explore potential prognostic factors. Methods: NSCLC patients who were complicated with CIP after immune checkpoint inhibitors (ICIs) therapy in our institute were enrolled in this study from 1 July 2018 to 30 November 2022. Clinical data of NSCLC-CIP patients were collected, including clinical and radiological features and their outcomes. Results: Among the 70 enrolled NSCLC-CIP patients, there were 57 males (81%) and 13 females (19%). The mean age at the diagnosis of CIP was (65.2±6.3) years. There were 46 smokers (66%), 26 patients (37%) with emphysema, 19 patients (27%) with previous interstitial lung disease, and 26 patients (37%) with a history of thoracic radiation. The mean interval from the first application of checkpoint inhibitor to the onset of CIP was (122.7±106.9) days (range: 2-458 days). The main chest CT manifestations were coincided with non-specific interstitial pneumonia (NSIP) pattern and organizing pneumonia (OP) pattern. Most patients had grade 2 (21 cases) or grade 3 (34 cases) CIP. Seventeen patients had been concurrent with other immune-related adverse events such as rash, hepatitis, colitis, and thyroiditis. Half of the enrolled patients (36 patients/51%) had fever, and most patients had elevated C-reactive protein (52 patients/72%) and all patients had elevated erythrocyte sedimentation rate (70 patients/100%). Serum lactate dehydrogenase was elevated in 34 CIP patients. Prednisone≥1 mg·kg-1·d-1 (or equivalent) was the most commonly used initial treatment in CIP patients (50 patients/71.4%). Complications with pulmonary infections (OR=4.44, P=0.03), use of anti-fungal drugs (OR=5.10, P=0.03) or therapeutic dose of sulfamethoxazole (OR=4.86, P=0.04), longer duration of prednisone≥1 mg·kg-1·d-1 (or equivalent) (Z=-2.33, P=0.02) were probable potential risk factors for poor prognosis. Conclusions: Older males with smoking history might be predisposed to develop NSCLC-CIPs after ICIs therapy. NSIP pattern and OP pattern were common chest CT manifestations. Complications with pulmonary infections (especially fungal infection or Pneumocystis jirovecii pneumonia), longer duration, longer duration of high-dose corticosteroids were likely potential risk factors for poor prognosis.
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Affiliation(s)
- R X Chen
- Department of Pulmonary and Critical care Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - X N Liu
- Internal Medical Department, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - Y Xu
- Department of Pulmonary and Critical care Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - Y J Shi
- Department of Pulmonary and Critical care Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - M Q Wang
- Internal Medical Department, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - C Shao
- Department of Pulmonary and Critical care Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - H Huang
- Department of Pulmonary and Critical care Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - K Xu
- Radiological Department, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China;Chen Ruxuan and Liu Xiangning contributed equally to this manuscript
| | - M Z Wang
- Department of Pulmonary and Critical care Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - Z J Xu
- Department of Pulmonary and Critical care Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
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Shi YJ, Chen RX, Liu XN, Shao C, Huang H, Xu K, Wang MZ, Xu ZJ. [Clinical analysis of COVID-19 in patients with preexisting interstitial lung abnormalities]. Zhonghua Jie He He Hu Xi Za Zhi 2024; 47:126-131. [PMID: 38309961 DOI: 10.3760/cma.j.cn112147-20231108-00298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 02/05/2024]
Abstract
Objective: To describe the clinical characteristics of SARS-CoV-2 infected patients with interstitial lung abnormalities (ILA) during the COVID-19 pandemic. Methods: We respectively enrolled ILA patients who had been regularly followed up in Peking Union Medical College Hospital for more than six months since January 2021. Clinical data of these ILA patients were collected after the outbreak of COVID-19 pandemic (from December 2022 to January 2023), thirty-eight patients with preexisting ILA were enrolled. Among them, there were 34 ILA patients (20 males and 14 females) who were infected with SARS-CoV-2 during this period, with an average age of (64.0±8.8) years old (range: 41-80). There were 12 (35.3%) ILA patients who were suffered from COVID-19(pneumonia group) and others were the non-pneumonia group. The clinical characteristics, including vaccination status, features of COVID-19 and outcomes of the two groups were compared. Results: Regarding the subcategories of ILA, there were 7 cases of subpleural fibrotic ILA, 10 cases of subpleural non-fibrotic ILA, and 17 cases of non-subpleural ILA. Before SARS-CoV-2 infection, the average pulse oxygen saturation at rest was (97.38±0.87)% (range: 96%-99%); average forced vital capacity (FVC) was (97.6±18.1)% predicted (range: 65%-132%); and average diffusion capacity for carbon monoxide (DLCO) was (76.2±16.3)% predicted (range: 53%-108%). Nineteen patients had been vaccinated with 3 doses of SARS-CoV-2 vaccines, and 5 of them developed COVID-19. One patient had received one dose of vaccine and did not develop COVID-19. The other 14 patients had not been vaccinated, and seven of them developed COVID-19. Of the 12 patients with COVID-19, six were diagnosed with severe COVID-19, and the other 6 ILA patients were diagnosed with moderate COVID-19. Among them, 1 patient was complicated by deep vein thrombosis of left lower limb. All 6 patients with severe COVID-19 who were cured after systemic corticosteroids. As for the other six moderate COVID-19 patients, all were cured and/or improved greatly: two were treated with short-term oral corticosteroids, one was prescribed a dose of compound betamethasone, and the other two were not treated with systemic corticosteroids. Conclusion: Patients with ILA were predisposed to develop COVID-19 after infection with SARS-CoV-2, and more than half of them had severe COVID-19.
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Affiliation(s)
- Y J Shi
- Department of pulmonary and critical care Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - R X Chen
- Department of pulmonary and critical care Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - X N Liu
- Internal Medical Department, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - C Shao
- Department of pulmonary and critical care Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - H Huang
- Department of pulmonary and critical care Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - K Xu
- Radiological Department, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730,China
| | - M Z Wang
- Department of pulmonary and critical care Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - Z J Xu
- Department of pulmonary and critical care Medicine, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
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Bao F, Shi YJ, Cong H, Guan X. [Study on the correlation between thyroid nodule and metabolic index in physical examination population]. Zhonghua Yu Fang Yi Xue Za Zhi 2023; 57:2110-2116. [PMID: 38186163 DOI: 10.3760/cma.j.cn112150-20230827-00126] [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: 01/09/2024]
Abstract
Objective: By analyzing the prevalence and influencing factors of thyroid nodules (TN) among a population undergoing physical examinations in Nantong region, this study aims to provide theoretical basis for early prevention and intervention of TN. Methods: A cross-sectional study was conducted, including 6 950 participants who underwent physical examinations at the Affiliated Hospital of Nantong University from January 2017 to April 2020. All participants underwent high-resolution ultrasound examination of the thyroid, and measurements of height, body mass index (BMI), blood pressure. Fasting blood glucose (FBG), total cholesterol (TC), triglycerides (TG), low-density lipoprotein cholesterol (LDL-C), and high-density lipoprotein cholesterol (HDL-C), uric acid (UA), homocysteine (HCY) and other metabolic indicators were detected. Data analysis was performed using SPSS 26.0 statistical software. The numerical variables with normal distribution were expressed as mean±standard deviation (x¯±s), and the t-test was used for comparison between the two groups. Numerical variables with non-normal distribution were expressed as median (interquartile range), namely M (Q1, Q3). The Mann-Whitney U test was used for comparison between two groups, and the Kruskal-Wallis test was used for comparison between multiple groups. Results: The prevalence of thyroid nodules among the 6 950 participants was 53.97% (3 751/6 950), with a rate of 47.08% (2 218/4 711) in males and 68.47% (1 533/2 239) in females, which was significantly higher in females than in males (χ2=278.575, P<0.001). The prevalence of TN increased with age both overall (χ2=552.145, P<0.001), in males (χ2=304.086, P<0.001), and in females (χ2=202.178, P<0.001). The prevalence of TN was higher in females than in males across different age groups (P<0.05). In the comparison between males in the TN and non-TN groups, significant differences were found in terms of alcohol consumption history, BMI, blood pressure, HCY, and FBG (all P<0.05). In the comparison between females in the TN and non-TN groups, significant differences were found in terms of BMI, blood pressure, HCY, FBG, TC, TG, LDL-C, and UA (all P<0.05). Univariate logistic regression model showed that FBG<6.1 mmol/L (P<0.001) and TC<5.2 mmol/L (P=0.013) were protective factors for TN. Normal UA (P=0.013) was a risk factor for TN. After adjusting for gender, smoking, alcohol consumption, BMI, and blood pressure, multivariate logistic regression analysis revealed that FBG<6.1 mmol/L (OR: 0.713, 95%CI: 0.621-0.817, P<0.001) was a protective factor against TN. Conclusion: The prevalence of TN is relatively high in the Nantong region. Gender, age, blood pressure, BMI, and FBG are important influencing factors for TN. Health screening and management should be strengthened for the physical examination population with abnormal indicators.
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Affiliation(s)
- F Bao
- Laboratory Medicine Center, Affiliated Hospital of Nantong University, Nantong 226001, China
| | - Y J Shi
- Laboratory Medicine Center, Affiliated Hospital of Nantong University, Nantong 226001, China
| | - H Cong
- Laboratory Medicine Center, Affiliated Hospital of Nantong University, Nantong 226001, China
| | - X Guan
- Laboratory Medicine Center, Affiliated Hospital of Nantong University, Nantong 226001, China
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Shi YJ, Han Y, Wang Y, Mao DF, Zhang JL, Xi R, Bai H, Wu T. [Analysis on the clinical efficacy and adverse reactions of blinatumomab for the treatment of relapsed/refractory acute lymphoblastic leukemia]. Zhonghua Xue Ye Xue Za Zhi 2023; 44:516-519. [PMID: 37550212 PMCID: PMC10450561 DOI: 10.3760/cma.j.issn.0253-2727.2023.06.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Indexed: 08/09/2023]
Affiliation(s)
- Y J Shi
- Department of Hematology, the 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Amy, Lanzhou 730050, China
| | - Y Han
- Department of Hematology, the 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Amy, Lanzhou 730050, China
| | - Y Wang
- Department of Hematology, the 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Amy, Lanzhou 730050, China
| | - D F Mao
- Department of Hematology, the 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Amy, Lanzhou 730050, China
| | - J L Zhang
- Department of Hematology, the 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Amy, Lanzhou 730050, China
| | - R Xi
- Department of Hematology, the 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Amy, Lanzhou 730050, China
| | - H Bai
- Department of Hematology, the 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Amy, Lanzhou 730050, China
| | - T Wu
- Department of Hematology, the 940th Hospital of Joint Logistics Support Force of Chinese People's Liberation Amy, Lanzhou 730050, China
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Liu YF, Hou N, Shi YJ, Li CX, Gao YJ, Liu LN. [Relationship between plasma levels of thrombin activatable fibrinolysis inhibitor, plasminogen activator inhibitor-1 and tissue-type plasminogen activator and deep venous thrombosis in patients with systemic lupus erythematosus]. Zhonghua Yi Xue Za Zhi 2023; 103:1638-1642. [PMID: 37248064 DOI: 10.3760/cma.j.cn112137-20220907-01888] [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: 05/31/2023]
Abstract
Objective: To investigate the plasma levels of thrombin activatable fibrinolysis inhibitor (TAFI), plasminogen activator inhibitor-1 (PAI-1) and tissue-type plasminogen activator (t-PA) in patients with systemic lupus erythematosus (SLE), and their relationship with deep venous thrombosis of the lower limbs. Methods: A case-control study was conducted to retrospectively select 32 SLE patients with deep venous thrombosis of the lower extremities (thrombus group) admitted to Liaocheng People's Hospital in Shandong Province from June 2018 to June 2021, including 4 males and 28 females, with a mean age of (49.7±5.5) years. Meanwhile, 64 SLE patients without deep venous thrombosis of the lower extremities (control group) were also selected, including 11 males and 53 females, with a mean age of (50.8±5.5) years. The plasma levels of TAFI, PAI-1 and t-PA of the two groups were compared. A logistic regression model was used to analyze the correlation of TAFI, PAI-1 and t-PA with SLE in patients. Results: The plasma levels of TAFI, PAI-1 and t-PA were (32.77±5.17) mg/L, (29.43±5.51) μg/L and (6.58±1.40) μg/L in the thrombotic group, while the plasma levels of TAFI, PAI-1 and t-PA in the control group were (23.56±4.40) mg/L, (19.00±4.40) μg/L and (9.40±2.23) μg/L. The levels of TAFI and PAI-1 in the thrombotic group were higher than those in the control group, while the level of t-PA was lower than that in the control group (all P<0.05). The results of logistic regression model showed that higher TAFI levels (OR=1.75, 95%CI: 1.05-2.90, P=0.043), higher PAI-1 levels (OR=1.85, 95%CI: 1.04-3.29, P=0.046), and lower t-PA levels (OR=0.72, 95%CI: 0.52-0.99, P=0.048) were related factors for the occurrence of deep venous thrombosis of the lower limbs in SLE patients. Conclusion: The plasma levels of TAFI and PAI-1 in SLE patients with deep venous thrombosis of the lower extremities increase, while the t-PA level decreases, which are related factors for the occurrence of deep venous thrombosis of the lower extremities in SLE patients.
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Affiliation(s)
- Y F Liu
- Department of Rheumatology and Immunology, Liaocheng People's Hospital of Shandong Province, Liaocheng 252000, China
| | - N Hou
- Department of Rheumatology and Immunology, Liaocheng People's Hospital of Shandong Province, Liaocheng 252000, China
| | - Y J Shi
- Department of Rheumatology and Immunology, Liaocheng People's Hospital of Shandong Province, Liaocheng 252000, China
| | - C X Li
- Department of Rheumatology and Immunology, Liaocheng People's Hospital of Shandong Province, Liaocheng 252000, China
| | - Y J Gao
- Department of Laboratory Medicine, Liaocheng People's Hospital of Shandong Province, Liaocheng 252000, China
| | - L N Liu
- Department of Rheumatology and Immunology, Liaocheng People's Hospital of Shandong Province, Liaocheng 252000, China
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Shi YJ, Zhang DZ. [Early aggressive anti-HBV therapy is beneficial to reduce the occurrence risk of liver cancer and reconstitution of immune function of HBV-specific T-lymphocyte]. Zhonghua Gan Zang Bing Za Zhi 2023; 31:314-315. [PMID: 37137859 DOI: 10.3760/cma.j.cn501113-20220602-00297] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Affiliation(s)
- Y J Shi
- Department of Infectious Diseases, the Second Affiliated Hospital of Chongqing Medical University, Institute for Viral Hepatitis, Chongqing Medical University, Key Laboratory of Molecular Biology for Infectious Diseases, Ministry of Education, Chongqing 401336, China
| | - D Z Zhang
- Department of Infectious Diseases, the Second Affiliated Hospital of Chongqing Medical University, Institute for Viral Hepatitis, Chongqing Medical University, Key Laboratory of Molecular Biology for Infectious Diseases, Ministry of Education, Chongqing 401336, China
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Shi YJ, Dong Y, Weng YH, Sun XP, Chen LX, Li XF, Kong LF. [Observation on the influnce of flood-soaking of paraffin blocks on the quality of diagnosis]. Zhonghua Bing Li Xue Za Zhi 2023; 52:61-63. [PMID: 36617911 DOI: 10.3760/cma.j.cn112151-20220608-00505] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Y J Shi
- Department of Clinical Pathology, Fuwai Central China Cardiovascular Hospital, Zhengzhou 450003, China
| | - Y Dong
- Department of Clinical Pathology, Fuwai Central China Cardiovascular Hospital, Zhengzhou 450003, China
| | - Y H Weng
- Department of Clinical Pathology, Fuwai Central China Cardiovascular Hospital, Zhengzhou 450003, China
| | - X P Sun
- Department of Clinical Pathology, Fuwai Central China Cardiovascular Hospital, Zhengzhou 450003, China
| | - L X Chen
- Department of Clinical Pathology, Fuwai Central China Cardiovascular Hospital, Zhengzhou 450003, China
| | - X F Li
- Department of Clinical Pathology, Fuwai Central China Cardiovascular Hospital, Zhengzhou 450003, China
| | - L F Kong
- Department of Clinical Pathology, Fuwai Central China Cardiovascular Hospital, Zhengzhou 450003, China
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Shi YJ, Yu S, Tian BW, Dai YM, Xu H, Tan B, Li Y. [Risk factors and characteristics of gut microbiota and metabolites in inflammatory bowel diseases patients with urolithiasis]. Zhonghua Yi Xue Za Zhi 2022; 102:3525-3531. [PMID: 36418251 DOI: 10.3760/cma.j.cn112137-20220519-01111] [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: 06/16/2023]
Abstract
Objective: To identify the related factors and characteristics of gut microbiota and metabolites in inflammatory bowel disease (IBD) patients with urolithiasis. Methods: A total of 68 IBD patients with urolithiasis and 136 gender-and age-matched IBD patients without urolithiasis in the Department of Gastroenterology, Peking Union Medical College Hospital from January 2014 to December 2019 were recruited. The diagnosis of urolithiasis was confirmed by plain films, ultrasonography, abdominal computed tomography or intravenous urography. The clinical data of patients were collected, and the association between the clinical characteristics and urolithiasis was further analyzed. The fecal samples were collected from 10 patients with urolithiasis and 18 patients without urolithiasis, and the gut microbiota and metabolites composition were analyzed. Results: There were 49 male and 19 female IBD patients with urolithiasis, with a mean age of (36.0±12.4) years, and 98 male and 38 female patients without urolithiasis, with a mean age of (36.1±12.5) years. Univariate analysis revealed that the rate of ileostomy and the resection of small intestine in Crohn's disease (CD) patients with urolithiasis (n=34) was significantly higher than CD patients without urolithiasis (n=68) (26.5% vs 7.4%, P=0.019). And the erythrocyte sedimentation rate was also higher [26.5 (12.0, 40.8) vs 13.0 (7.2, 32.5) mm/1 h, P=0.022] in CD patients with urolithiasis. There were no significant differences in clinical characteristics and biochemical parameters between the ulcerative colitis (UC) patients with urolithiasis (n=34) and without urolithiasis (n=68) (all P>0.05). The multivariate logistic regression analysis indicated that ileostomy and the resection of small intestine were the independent related factors for urolithiasis in CD patients (OR=4.619, 95%CI: 1.178-18.111, P=0.028). There was no significant difference in α and β diversity between the two groups (all P>0.05). At the phylum level, there was no significant difference in the abundance of microbiota (all P>0.05). At the genus level, the abundance of Enterococcus (P=0.049), Eubacterium_eligens (P=0.036) was significantly decreased. At the species level, the abundance of Bacteroides_coprocola was increased in urolithiasis group (P=0.035), while the abundance of Blautia_caecimuris was significantly decreased (P=0.042). No significant difference was found in fecal metabolites between the two groups (all P>0.05). According to LDA effect size (Lefse) analysis, taxa including Sphingomonadales, Fenollaria, Bacteroides_coprocola contributed greatly to the difference between the two groups. Conclusions: Ileostomy and the resection of small intestine are related factors for urolithiasis in patients with CD. Gut microbiota may be involved in the occurrence of urolithiasis in patients with IBD.
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Affiliation(s)
- Y J Shi
- Department of Gastroenterology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China
| | - S Yu
- Department of Gastroenterology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China
| | - B W Tian
- Department of Gastroenterology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Y M Dai
- Department of Gastroenterology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China
| | - H Xu
- Department of Gastroenterology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China
| | - B Tan
- Department of Gastroenterology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Y Li
- Department of Gastroenterology, Peking Union Medical College Hospital, Peking Union Medical College & Chinese Academy of Medical Sciences, Beijing 100730, China
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Shi YJ, Ding Y, Ao L, Zhang DZ, Cai DC. [Very low-level viremia: new clinical attention-requiring problem during the course of anti-hepatitis B virus treatment]. Zhonghua Gan Zang Bing Za Zhi 2021; 29:1147-1150. [PMID: 35045628 DOI: 10.3760/cma.j.cn501113-20210830-00442] [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: 06/14/2023]
Abstract
Clinical studies have validated low-level viremia is associated with a variety of adverse outcomes in patients with chronic hepatitis B during the course of receiving nucleos(t)ide analogue antiviral therapy. With the advancement of PCR technology, the high sensitivity PCR detection of HBV DNA can reach the lower limit of detection of < 5-10 IU/mL. The standard criterion for judging among patients who have achieved complete virological response is HBV DNA levels < 20 IU/ml. The use of highly sensitive PCR tests can detect very low-level viremia (HBV DNA < 20 IU/ml, but > 5-10 IU/mL) in some patients. However, there are currently fewer relevant studies, and more research data needs to be accumulated to answer this clinical question of whether long-term very low-level viremia affects the clinical outcome of patients with chronic hepatitis B.
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Affiliation(s)
- Y J Shi
- Department of Infectious Diseases, the Second Affiliated Hospital of Chongqing Medical University; Institute for Viral Hepatitis, Chongqing Medical University; Key Laboratory of Molecular Biology for Infectious Diseases, Ministry of Education; Chongqing 400010, China
| | - Y Ding
- Department of Infectious Diseases, the Second Affiliated Hospital of Chongqing Medical University; Institute for Viral Hepatitis, Chongqing Medical University; Key Laboratory of Molecular Biology for Infectious Diseases, Ministry of Education; Chongqing 400010, China
| | - L Ao
- Department of Infectious Diseases, the Second Affiliated Hospital of Chongqing Medical University; Institute for Viral Hepatitis, Chongqing Medical University; Key Laboratory of Molecular Biology for Infectious Diseases, Ministry of Education; Chongqing 400010, China
| | - D Z Zhang
- Department of Infectious Diseases, the Second Affiliated Hospital of Chongqing Medical University; Institute for Viral Hepatitis, Chongqing Medical University; Key Laboratory of Molecular Biology for Infectious Diseases, Ministry of Education; Chongqing 400010, China
| | - D C Cai
- Department of Infectious Diseases, the Second Affiliated Hospital of Chongqing Medical University; Institute for Viral Hepatitis, Chongqing Medical University; Key Laboratory of Molecular Biology for Infectious Diseases, Ministry of Education; Chongqing 400010, China
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Yue HX, Zhan YL, Bian F, Zhang YF, Gui LT, Shi YJ, Meng YH, Zhang J, Jiang Y. [Data standard and data sharing in clinical cohort studies]. Zhonghua Liu Xing Bing Xue Za Zhi 2021; 42:1299-1305. [PMID: 34814547 DOI: 10.3760/cma.j.cn112338-20200610-00831] [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: 06/13/2023]
Abstract
Data standard plays an important role in the process of data collection, Integration and sharing in clinical cohort studies, and more attention have been paid to it. This paper summarizes the 5 international proven data standard model, analyze their characteristics and development status, and match their data modules with the general data set of the clinical cohorts to evaluate the international data standard models' applicability and provide reference for the development and improvement of the data standard model for clinical cohort studies in China.
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Affiliation(s)
- H X Yue
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Y L Zhan
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - F Bian
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Y F Zhang
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - L T Gui
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Y J Shi
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Y H Meng
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - J Zhang
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
| | - Y Jiang
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100730, China
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11
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Feng YH, Yue HX, Zhan YL, Shi YJ, Chen YL, Wang YW, Wu SS, Cai SY, Jiang Y. [Study on mental health status of pregnant women and its influencing factors in the third trimester]. Zhonghua Liu Xing Bing Xue Za Zhi 2021; 42:853-858. [PMID: 34814478 DOI: 10.3760/cma.j.cn112338-20200827-01102] [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: 06/13/2023]
Abstract
Objective: To understand the mental health status of pregnant women in the third trimester of pregnancy, and explore the influencing factors. Methods: The general demographic information and pregnancy information of 575 pregnant women in the Chinese Pregnant Women Cohort Study were collected. The mental health status of pregnant women in the third trimester was investigated by using Edinburgh Postpartum Depression Scale, Self-Rating Anxiety Scale and University of California at Los Angeles. Multivariate unconditional logistic regression was used to analyze the influencing factors for mental health of pregnant women. Results: In the third trimester of pregnancy, the incidence of depression was 16.52%, the incidence of anxiety was 11.13%, and the incidence of feeling loneliness was 26.26%. Logistic regression analysis showed that compared with those with education level of junior high school below, those with education level of college or bachelor's degree (OR=0.418, 95%CI: 0.184-0.950) and master's degree or above (OR=0.116, 95%CI: 0.027-0.503) were less likely to feel loneliness. Pregnant women with higher annual family income (10 000 RMB yuan) were less likely to suffer from depression (≥20 vs. <10: OR=0.527, 95%CI: 0.279-0.998), anxiety (10-20 vs. <10: OR=0.363, 95%CI: 0.180-0.731; ≥20 vs. <10: OR=0.271, 95%CI: 0.132-0.554) and feeling loneliness (≥20 vs. <10: OR=0.477, 95%CI: 0.276-0.826). Conclusions: The education level and family income have impacts on the mental health status of pregnant women in the third trimester. Medical staff should give targeted psychological advice to pregnant women to improve their mental health status.
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Affiliation(s)
- Y H Feng
- State Key Laboratory of Experimental Hematology, National Clinical Research Center for Blood Diseases, Institute of Hematology & Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300020, China
| | - H X Yue
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - Y L Zhan
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - Y J Shi
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - Y L Chen
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - Y W Wang
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - S S Wu
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - S Y Cai
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
| | - Y Jiang
- School of Population Medicine and Public Health, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100730, China
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12
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Shi YJ, Li J, Meng YH, Xiang L, Yan RJ, Zhan YL, Yue HX, Jiang Y, Li N, Zhang J, He J. [Quality assessment of global lung cancer screening guidelines and consensus]. Zhonghua Liu Xing Bing Xue Za Zhi 2021; 42:241-247. [PMID: 33626610 DOI: 10.3760/cma.j.cn112338-20200806-01035] [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 understand the research progress and quality of lung cancer screening guidelines and consensus in China and abroad, and to provide reference for the formulation of high-quality lung cancer screening guidelines in China. Methods: Databases including PubMed, Medline, Embase, Cochrane Library, Web of Science, China National Knowledge Infrastructure, SinoMed, VIP and Wanfang Data were searched, websites and important references were also searched by hand retrieval. The Appraisal of Guidelines for Research & Evaluation Ⅱ(AGREE Ⅱ) and Reporting Items for Practice Guidelines in Healthcare (RIGHT) were used to assess the quality of newly published or updated guidelines and consensus. Results: A total of 9 guidelines and consensus published between 2015 and 2020 were included in this study, with countries including the United States, China, Canada, Saudi Arabia and South Africa. The field of scope and purpose and clarity of presentation scored relatively high but the rigor of development and applicability scored low. Five guidelines were judged to be A-level, all of which were published abroad, and the remaining four were B-level, including three guidelines and consensus issued by China and 1 guideline issued by South Africa. The report rate of RIGHT were higher in basic information and background, lower in review and quality assurance, funding and declaration and management of interests. There were 5 guidelines with a good level and 4 guidelines and consensus with a moderate level. The best overall quality guidelines were those published by the American College of Chest Physicians in 2018 and by the Canadian Task Force on Preventive Health Care in 2016. Conclusions: The number of countries and institutions that issue lung cancer screening guidelines and consensus had been increasing gradually, but the quality in China remained low. It is necessary to develop high-quality lung cancer screening guidelines suitable for China's national conditions in combination with evidence-based methods to guide practice.
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Affiliation(s)
- Y J Shi
- School of Population Medicine and Public Health, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - J Li
- Office of Cancer Screening, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Y H Meng
- School of Population Medicine and Public Health, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - L Xiang
- School of Population Medicine and Public Health, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - R J Yan
- School of Population Medicine and Public Health, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Y L Zhan
- School of Population Medicine and Public Health, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - H X Yue
- School of Population Medicine and Public Health, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - Y Jiang
- School of Population Medicine and Public Health, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - N Li
- Office of Cancer Screening, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - J Zhang
- School of Population Medicine and Public Health, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, China
| | - J He
- Department of Thoracic Surgery, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
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13
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Shi YJ, Zuo W, Zhang YY, Sun M, Qian YZ. [Identification of a novel mutation of the PAX9 gene and clinical treatment in a nonsyndromic oligodontia family]. Zhonghua Kou Qiang Yi Xue Za Zhi 2021; 56:207-209. [PMID: 33557508 DOI: 10.3760/cma.j.cn112144-20200427-00235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Affiliation(s)
- Y J Shi
- Center of Stomatology, The Second Affiliated Hospital of Soochow University, Suzhou 215004, China
| | - W Zuo
- Center of Stomatology, The Second Affiliated Hospital of Soochow University, Suzhou 215004, China
| | - Y Y Zhang
- Institute for Fetology, The First Affiliated Hospital of Soochow University, Suzhou 215006, China
| | - M Sun
- Institute for Fetology, The First Affiliated Hospital of Soochow University, Suzhou 215006, China
| | - Y Z Qian
- Center of Stomatology, The Second Affiliated Hospital of Soochow University, Suzhou 215004, China
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14
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Yue HX, Feng YH, Wu SS, Wang YW, Cai SY, Shi YJ, Chen YL, Zhan YL, Ma LK, Jiang Y. [Effects of changes in physical activities on depressive symptoms during pregnancy: a cohort study]. Zhonghua Liu Xing Bing Xue Za Zhi 2020; 41:834-838. [PMID: 32564545 DOI: 10.3760/cma.j.cn112338-20200118-00043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the effect of changes in physical activities on depressive symptoms in the second trimester of pregnancy. Methods: Data from the Chinese Pregnant Women Cohort Study, from July 25, 2017 to November 26, 2018, were used. Women who had effectively completed the survey of physical activity and depressive symptoms in the first and second trimesters of pregnancy, were recruited. Both International Physical Activity Questionnaire-short and Edinburgh Postnatal Depression Scale were used, respectively. Pregnant women who had completed two surveys were included in our study and were divided into two groups according to the depressive symptoms, measured at the baseline. Among the pregnant women without depressive symptoms at the baseline, logistic regression was used to analyze the effects of changes in physical activity on the prevention of depressive symptoms. Effect on the reduction of depressive symptoms was analyzed, using the same method. Results: The prevalence rates of depressive symptoms were 23.83% and 20.57% in the baseline and second trimester, respectively. After adjusting for age, education level, occupation, family annual income and pre-pregnancy BMI, data from the logistic regression showed that women without depressive symptoms and with increased and adequate physical activities in the baseline, were with lower risks to develop depressive symptoms in the second trimester (OR=0.479, 95%CI: 0.335-0.684;OR=0.566, 95%CI: 0.394-0.815). Among women with depressive symptoms in the baseline survey, association between physical activity and depressive symptoms was not statistically significant (P>0.05). Conclusions: Increased and adequate physical activities showed preventive effects on depressive symptoms during pregnancy, but the remission effect was not obvious in women with depressive symptoms. Pregnant women should be encouraged to increase their physical activities while screening programs should also be carried out to reduce the depressive symptoms during pregnancy.
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Affiliation(s)
- H X Yue
- School of Public Health, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
| | - Y H Feng
- School of Public Health, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
| | - S S Wu
- School of Public Health, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
| | - Y W Wang
- School of Public Health, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
| | - S Y Cai
- School of Public Health, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
| | - Y J Shi
- School of Public Health, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
| | - Y L Chen
- School of Public Health, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
| | - Y L Zhan
- School of Public Health, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
| | - L K Ma
- Department of Obstetrics and Gynecology, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
| | - Y Jiang
- School of Public Health, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
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15
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Cai SY, Feng YH, Wang YW, Wu SS, Zhan YL, Ma S, Shen ZZ, Shi YJ, Chen YL, Ma LK, Jiang Y. [Factors associated with sleep quality during first and second trimester in Chinese pregnant woman]. Zhonghua Liu Xing Bing Xue Za Zhi 2020; 41:711-715. [PMID: 32447912 DOI: 10.3760/cma.j.cn112338-20190801-00572] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate sleep quality in pregnant women during their first and second trimester and to identify risk factors. Methods: Data was from the Chinese Pregnant Women Cohort Study. A total of 3 618 pregnant women were included, with the exclusion 346 women who had missing information. Sociodemographic, health-related behavior, depression and sleep quality information were collected and analyzed. Logistic regression analysis were used to explore the influencing factors of sleep quality in pregnant women. Results: Among the 3 618 pregnant woman 28.2% had poor sleep quality in their first trimester and 28.7% in the second trimester. 15.2% pregnant women had progressively worse sleep and 13.0% had persistently poor sleep had pregnant women were generally suffered from poor sleep quality, difficulty falling asleep, sleep disorders and daily fatigue. Regular diet (OR=0.75, 95%CI: 0.62-0.92) and work (OR=0.84,95%CI: 0.71-0.99) in the first trimester were protective factors of sleep quality in pregnant women. Age ≥30 year old (OR=1.19, 95%CI: 1.03-1.37), passive smoking (OR=1.18, 95%CI: 1.02-1.36) and depression (OR=2.25, 95%CI: 1.95-2.61) in the first trimester were risk factors. Conclusions: The rate of poor sleep quality are high among Chinese pregnant woman during their first and second trimester. The risk factors of sleep quality are multiple. Regular diet and work, reduction of tobacco exposure, alleviation of depression symptom may help improve sleep quality among pregnant women.
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Affiliation(s)
- S Y Cai
- School of Public Health, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
| | - Y H Feng
- School of Public Health, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
| | - Y W Wang
- School of Public Health, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
| | - S S Wu
- School of Public Health, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
| | - Y L Zhan
- School of Public Health, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
| | - S Ma
- School of Public Health, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
| | - Z Z Shen
- School of Public Health, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
| | - Y J Shi
- School of Public Health, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
| | - Y L Chen
- School of Public Health, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
| | - L K Ma
- Department of Gynecology and Obstetrics, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
| | - Y Jiang
- School of Public Health, Peking Union Medical College Hospital, Chinese Academy of Medical Science and Peking Union Medical College, Beijing 100730, China
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16
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Liu TT, Li Y, Yao SY, Wang C, Wang M, Liu J, Shi YJ, Xue H. [Effect of individualized antihypertensive therapy on the blood pressure and left ventricular hypertrophy of hypertensive patients with coronary heart disease]. Zhonghua Yi Xue Za Zhi 2019; 99:977-982. [PMID: 30955308 DOI: 10.3760/cma.j.issn.0376-2491.2019.13.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the effect of individualized antihypertensive therapy on the blood pressure and left ventricular hypertrophy (LVH) of hypertensive patients with coronary heart disease (CHD). Methods: We conducted a prospective study from Sep. 2014 to Dec. 2015 in Chinese PLA General Hospital. A total of 650 patients complicated with non-dipper or reverse-dipper hypertension and CHD were enrolled. All the participants were divided into non-dipper (n=259) and reverse-dipper (n=391) group according to their 24h ambulatory blood pressure monitoring (ABPM) reports. Patients who took short-acting antihypertensives changed their medicine to long-acting ones. Patients who had already taken long-acting antihypertensives switched to nighttime or added antihypertensives at night. Self-measured home blood pressure was recorded before going to bed and in the morning. All patients were regularly followed up by face-to-face surveys and clinic BP was recorded every 3 months. After 1 year's follow-up, the effect of individualized antihypertensive treatment on circadian rhythm of blood pressure was evaluated by 24h ABPM. The effect of individualized antihypertensive treatment on LVH was evaluated by echocardiography. Results: After 1 year's individualized antihypertensive therapy, the clinic BP and 24h ABPM of the patients were decreased. BP rhythm in 44% of the non-dipper and 57% of the reverse-dipper patients restored to normal. LVH were returned to normal in 44% of the non-dipper patients and and 48% of the reverse dipper patients, respectively. Left ventricular mass index (LVMI) were (59±12) kg/m(2.7) vs (48±10) kg/m(2.7) (P<0.01), and (63±13) kg/m(2.7) vs (48±11) kg/m(2.7) (P<0.01) respectively in non-dipper and reverse-dipper group before and after individualized antihypertensive treatment. Conclusion: Individualized antihypertensive intervention of abnormal blood pressure circadian rhythm can effectively restore the circadian rhythm of blood pressure and reverse LVH in hypertensive patients with CHD.
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Affiliation(s)
- T T Liu
- Medical Big Data Center of Chinese PLA General Hospital, Beijing 100853, China
| | - Y Li
- Department of Cardiology of Chinese PLA General Hospital, Beijing 100853, China
| | - S Y Yao
- Department of Cardiology of Chinese PLA General Hospital, Beijing 100853, China
| | - C Wang
- Department of Cardiology of Chinese PLA General Hospital, Beijing 100853, China
| | - M Wang
- School of Medicine, Nankai University, Tianjin 300071, China
| | - J Liu
- Department of Cardiology of Chinese PLA General Hospital, Beijing 100853, China
| | - Y J Shi
- Department of Cardiology of Chinese PLA General Hospital, Beijing 100853, China
| | - H Xue
- Department of Cardiology of Chinese PLA General Hospital, Beijing 100853, China
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17
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Wang X, Chen WZ, Zhang J, Li JH, Sun YP, Shi YJ, Zhang L, Chen LL, Zhou X, Zhou RH. Application of miniSTR Loci and Its Detection System for Degraded Materials in Forensic Medicine. Fa Yi Xue Za Zhi 2018; 34:532-537. [PMID: 30468058 DOI: 10.12116/j.issn.1004-5619.2018.05.019] [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] [Received: 01/04/2017] [Indexed: 11/30/2022]
Abstract
OBJECTIVES To establish multiplex system of 16 miniSTR loci, and explore its application value for the degraded materials in forensic medicine. METHODS The multiplex system of 16 miniSTR loci was established using a six-dye fluorescence labeling technology and its application value in forensic medicine was assessed. RESULTS A six-dye fluorescence labeling miniSTR amplification kit was developed, which enabled 15 autosomal STR loci, Amelogenin locus and DYS391 to be typed simultaneously. This method showed good specificity and could provide stable and accurate typing results with a sensitivity of 50 pg. This system also provided a good test result for the normal biological sample of actual cases. CONCLUSIONS The multiplex system of 16 miniSTR loci has application value for degraded and trace materials with the advantages of high sensitivity and database compatibility, which can be used for forensic casework.
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Affiliation(s)
- Xin Wang
- Institute of Forensic Science, Suzhou Public Security Bureau, Suzhou 215131, Jiangsu Province, China
| | - W Z Chen
- Institute of Forensic Science, Suzhou Public Security Bureau, Suzhou 215131, Jiangsu Province, China
| | - J Zhang
- Institute of Forensic Science, Suzhou Public Security Bureau, Suzhou 215131, Jiangsu Province, China
| | - J H Li
- Institute of Forensic Science, Suzhou Public Security Bureau, Suzhou 215131, Jiangsu Province, China
| | - Y P Sun
- Institute of Forensic Science, Suzhou Public Security Bureau, Suzhou 215131, Jiangsu Province, China
| | - Y J Shi
- Institute of Forensic Science, Suzhou Public Security Bureau, Suzhou 215131, Jiangsu Province, China
| | - L Zhang
- AGCU ScienTech Incorporation, Wuxi 214174, Jiangsu Province, China
| | - L L Chen
- AGCU ScienTech Incorporation, Wuxi 214174, Jiangsu Province, China
| | - X Zhou
- AGCU ScienTech Incorporation, Wuxi 214174, Jiangsu Province, China
| | - R H Zhou
- Institute of Forensic Science, Suzhou Public Security Bureau, Suzhou 215131, Jiangsu Province, China
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18
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Lyu B, Chen J, Hu RJ, Delgado-Aparicio LF, Wang FD, Bitter M, Hill KW, Pablant N, Lee SG, Ye MY, Shi YJ, Wan BN. Development of wavelength calibration techniques for high-resolution x-ray imaging crystal spectrometers on the EAST tokamak. Rev Sci Instrum 2018; 89:10F112. [PMID: 30399885 DOI: 10.1063/1.5039314] [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] [Received: 05/07/2018] [Accepted: 07/26/2018] [Indexed: 06/08/2023]
Abstract
Newly developed large-area pixelated two-dimensional detector and two-crystal assemblies were deployed for the first time on tokamaks to enable time-resolved Bragg-diffracted x-ray imaging with good framing rate and water-cooling capabilities for in-vacuum long-pulse operations. High-quality helium-like (He-like) and hydrogen-like (H-like) argon spectra have been observed simultaneously for the first time on a single detector for a wide range of plasma parameters to infer both ion temperature and rotation profiles and support studies on spontaneous rotation, impurity transport, and RF physics. Since tokamak plasmas rotate in both the poloidal (θ) and toroidal (ϕ) directions, a reliable wavelength calibration is needed to account for the correct Doppler shift as well as to compute the spectrometer's instrumental function. Lyα lines emitted from Cd x-ray tubes are proposed to be used as "markers" to provide an in situ calibration of the EAST's X-ray imaging crystal spectrometer systems measuring He- and H-like argon spectra. The first lab test indicated that the X-ray tube can excite strong Lyα lines at 15 kV voltage and 1 mA current when the crystal is shined for 10 min. Other indirect calibration methods using locked-mode discharge scenarios were also studied as complementary methods.
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Affiliation(s)
- B Lyu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - J Chen
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - R J Hu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | | | - F D Wang
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - M Bitter
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543-0451, USA
| | - K W Hill
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543-0451, USA
| | - N Pablant
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543-0451, USA
| | - S G Lee
- National Fusion Research Institute, Daejeon 305-333, South Korea
| | - M Y Ye
- Department of Engineering and Applied Physics, University of Science and Technology of China, Hefei 230026, China
| | - Y J Shi
- Department of Nuclear Engineering, Seoul National University, Seoul 151-742, South Korea
| | - B N Wan
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
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19
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Li YY, Zhou YX, Jiang D, Tao W, Fu J, Lyu B, Shi YJ, Ye MY, Wan BN. Simultaneous measurement of C VI, Ne X, and Li III charge exchange lines on EAST. Rev Sci Instrum 2018; 89:10D119. [PMID: 30399940 DOI: 10.1063/1.5036835] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2018] [Accepted: 05/25/2018] [Indexed: 06/08/2023]
Abstract
The core toroidal charge exchange recombination spectroscopy system on experimental advanced superconducting tokamak (EAST) has been enhanced recently to extend the spectral range. The C VI charge exchange line at 529.059 nm, Ne X line at 524.897 nm, and Li III line at 516.67 nm are observed successfully. The measurements were performed by injecting neon gas and dropping lithium powder simultaneously during the 2016 EAST experimental campaign. One channel connected to a neon lamp is used to perform the real-time wavelength calibration on a shot-to-shot basis. The preliminary results indicate that ion temperature profiles from the carbon and neon impurities are in excellent agreement and provide a consistency check of the measurement from different impurities. Toroidal velocity correction associated with the energy-dependent cross section has been performed. Toroidal rotation of neon impurity is obviously faster than C VI across the whole profile. A cumulative and saturated effect of core lithium ions was observed.
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Affiliation(s)
- Y Y Li
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - Y X Zhou
- Department of Engineering and Applied Physics, University of Science and Technology of China, Hefei 230026, China
| | - D Jiang
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - W Tao
- Department of Engineering and Applied Physics, University of Science and Technology of China, Hefei 230026, China
| | - J Fu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - B Lyu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - Y J Shi
- Department of Nuclear Engineering, Seoul National University, Seoul 151-742, South Korea
| | - M Y Ye
- Department of Engineering and Applied Physics, University of Science and Technology of China, Hefei 230026, China
| | - B N Wan
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
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20
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Hu RJ, Chen J, Delgado-Aparicio LF, Wang QP, Du XW, Shen J, Yang XS, Wang FD, Fu J, Li YY, Bitter M, Hill KW, Pablant NA, Lee SG, Shi YJ, Wan BN, Ye MY, Lyu B. Upgrade of X-ray crystal spectrometer for high temperature measurement using neon-like xenon lines on EAST. Rev Sci Instrum 2018; 89:10F110. [PMID: 30399886 DOI: 10.1063/1.5038885] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/06/2018] [Accepted: 06/13/2018] [Indexed: 06/08/2023]
Abstract
A two-crystal X-ray spectrometer system has been implemented in the EAST tokamak to simultaneously diagnose high- and low-temperature plasmas using He- and H-like argon spectra. But for future fusion devices like ITER and Chinese Fusion Engineering Test Reactor (CFETR), argon ions become fully stripped in the core and the intensity of the H-like lines will be significantly at high temperatures (Te > 5 keV). With increasing auxiliary heating power on EAST, the core plasma temperature could also reach 5 keV and higher. In such conditions, the use of a xenon puff becomes an appropriate choice for both ion-temperature and flow-velocity measurements. A new two-crystal system using a quartz 110 crystal (2d = 4.913 Å) to view He-like argon lines and a quartz 011 crystal (2d = 6.686 Å) to view Ne-like xenon spectra has been deployed on a poloidal X-ray crystal spectrometer. While the He-like argon spectra will be used to measure the plasma temperature in the edge plasma region, the Ne-like xenon spectra will be used for measurement in the hot core. The new crystal arrangement allows a wide temperature measurement ranging from 0.5 to 10 keV or even higher, being the first tests for burning plasmas like ITER and CFETR. The preliminary result of lab-tests, Ne-like xenon lines measurement will be presented.
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Affiliation(s)
- R J Hu
- School of Physical Sciences, University of Science and Technology of China, Hefei 230026, China
| | - J Chen
- School of Physical Sciences, University of Science and Technology of China, Hefei 230026, China
| | | | - Q P Wang
- School of Physical Sciences, University of Science and Technology of China, Hefei 230026, China
| | - X W Du
- School of Physical Sciences, University of Science and Technology of China, Hefei 230026, China
| | - J Shen
- School of Physical Sciences, University of Science and Technology of China, Hefei 230026, China
| | - X S Yang
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - F D Wang
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - J Fu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - Y Y Li
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - M Bitter
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - K W Hill
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - N A Pablant
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - S G Lee
- National Fusion Research Institute, Daejeon 305-333, South Korea
| | - Y J Shi
- Department of Nuclear Engineering, Seoul National University, Seoul 151-742, South Korea
| | - B N Wan
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - M Y Ye
- School of Physical Sciences, University of Science and Technology of China, Hefei 230026, China
| | - B Lyu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
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21
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Xu LY, Wang MY, Shi XZ, Yu QB, Shi YJ, Xu SX, Sun WX. Effect of long-term organic fertilization on the soil pore characteristics of greenhouse vegetable fields converted from rice-wheat rotation fields. Sci Total Environ 2018; 631-632:1243-1250. [PMID: 29727949 DOI: 10.1016/j.scitotenv.2018.03.070] [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] [Subscribe] [Scholar Register] [Received: 10/13/2017] [Revised: 03/05/2018] [Accepted: 03/07/2018] [Indexed: 06/08/2023]
Abstract
The shift from rice-wheat rotation (RWR) to greenhouse vegetable soils has been widely practiced in China. Several studies have discussed the changes in soil properties with land-use changes, but few studies have sought to address the differences in soil pore properties, especially for fields based on long-term organic fertilization under greenhouse vegetable system from RWR fields. This study uses the X-ray computed tomography (CT) scanning and statistical analysis to compare the long-term effects of the conversion of organic greenhouse vegetable fields (over one year, nine years, and fourteen years) from RWR fields on the soil macropore structure as well as the influencing factors from samples obtained in Nanjing, Jiangsu, China, using the surface soil layer and triplicate samples. The results demonstrated that the macropore structure became more complex and stable, with a higher connectivity, fractal dimension (FD) and a lower degree of anisotropy (DA), as the greenhouse vegetable planting time increased. The total topsoil macroporosity increased considerably, but the rate of increase gradually decelerated with time. The transmission pores (round pores ranging from 50 to 500μm) increased with time, but the biopores (>2000μm) clearly decreased after nine years of use as greenhouse vegetable fields. Soil organic matter (OM) has a significant relationship with the soil pore structure characteristics, especially for the transmission pores. In addition, organic fertilization on the topsoil had a short-term effect on the pores, but the effect stabilized and had a weak influence on the pores over longer periods. These results suggested that organic fertilization was conducive for controlling soil degradation regarding it physical quality for water and oxygen availability in the short term.
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Affiliation(s)
- L Y Xu
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of the Chinese Academy of Sciences, Beijing 100049, China
| | - M Y Wang
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China.
| | - X Z Shi
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Q B Yu
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of the Chinese Academy of Sciences, Beijing 100049, China
| | - Y J Shi
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China; University of the Chinese Academy of Sciences, Beijing 100049, China
| | - S X Xu
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
| | - W X Sun
- State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
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22
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Zhang MY, Wang GC, Huang GJ, Feng H, Wang LF, Zhang JY, Shi YJ, Zhang CQ. [Analysis of 833 times measured hepatic venous pressure gradient]. Zhonghua Gan Zang Bing Za Zhi 2018; 26:266-270. [PMID: 29996337 DOI: 10.3760/cma.j.issn.1007-3418.2018.04.007] [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: 06/08/2023]
Abstract
Objective: To summarize and analyze the clinical data of hepatic venous pressure gradient (HVPG) and to explore the application value of HVPG in the diagnosis, evaluation and clinical treatment of portal hypertension in cirrhosis. Methods: The patient data of HVPG measurement performed in Shandong Provincial Hospital from April 2010 to November 2017 were collected. Results: A total of 633 patients with 833 times of HVPG measurements were included. There was significant difference in HVPG between patients with different etiologies, different Child-pugh grades and different degrees of decompensated cirrhosis. Conclusion: The HVPG test is suitable for the diagnosis and evaluation of portal hypertension. The HVPG of patients with different severity of liver cirrhosis can guide the choice of the treatment plan, and the HVPG measurement should also be strictly standardized and quality control.
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Affiliation(s)
- M Y Zhang
- Shandong Provincial Hospital Affiliated to Shandong University, Jinan 250000, China
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23
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Zhu Y, Shi YJ, Zhao YL, Zhu P. [Topoisomerase inhibitor upregulates MICA/B expression in breast cancer cells through ATM/ATR and NF-κB pathway]. Beijing Da Xue Xue Bao Yi Xue Ban 2018; 50:318-325. [PMID: 29643533] [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: 06/08/2023]
Abstract
OBJECTIVE To investigate the effects of chemotherapeutic agents widely used in clinical practice on major histocompatibility complex class I-related chain A and B (MICA/B) expression in breast cancer cells, and to explore the molecular mechanisms involved. METHODS We examined MICA/B mRNA and surface protein expressions in breast cancer cells treated with chemotherapeutic agents by real-time RT-PCR and flow cytometry respectively. The blocking effects of ataxia telangiectasia mutated and Rad3-related kinase (ATM/ATR) inhibitor caffeine and nuclear factor κB (NF-κB) inhibitor pynolidine dithiocarbamate (PDTC) on etoposide-upregulated MICA/B mRNA and surface protein expressions were investigated. Electrophoretic mobility shift assay (EMSA) was taken to investigate whether etoposide enhanced the binding of NF-κB to MICA/B gene promoter. RESULTS Three topoisomerase inhibitors etoposide, camptothecin and doxorubicine upregulated MICA and MICB mRNA expressions in breast cancer cell MCF-7. Comparing to no-drug-treated cells, MICA mRNA levels increased to (1.68±0.17), (2.54±0.25) and (3.42±0.15) fold, and levels of MICB mRNA increased to (1.82±0.24), (1.56±0.05) and (5.84±0.57) fold respectively in cancer cells treated by etoposide at the concentrations of 5, 20 and 100 μmol/L (P<0.05). MICA and MICB mRNA levels also increased significantly when MCF-7 cells were incubated with camptothecin or doxorubicine at the specific concentrations (P<0.05). MICB mRNA expression also increased slightly in another breast cancer cell SK-BR-3 treated by topoisomerase II inhibitors etoposide and camptothecin (P<0.05). Furthermore, etoposide and camptothecin upregulated MICA/B surface protein expression in MCF-7 cells (P<0.05), and the upregulation was found in both living and apoptotic cells. Our study showed that etoposide induced-MICA/B expression in MCF-7 was inhibited by caffeine at different concentrations. When cancer cells were treated by caffeine with 1, 5 and 10 mmol/L, MICA mRNA levels decreased from (3.75±0.25) to (0.89±0.05), (0.81±0.02) and (0.48±0.04) fold respectively (P<0.001), and MICB mRNA levels decreased from (6.85±0.35) to (1.36±0.13), (0.76±0.06) and (0.56±0.03) fold (P<0.05), while MICA/B protein levels decreased from (3.42±0.05) to (1.32±0.03), (1.21±0.06) and (1.14±0.03) fold (P<0.001), indicating that etoposide-induced MICA/B expression was inhibited by ATM/ATR inhibitor. Similarly, NF-κB inhibitor PDTC also inhibited MICA/B mRNA and protein expressions induced by etoposide significantly when MCF-7 cells were incubated with PDTC at the concentrations of 10, 50 and 100 μmol/L (P<0.05), indicating that NF-κB was also involved in this process. EMSA showed that the binding of NF-κB to MICA/B promoter enhanced in MCF-7 cells after etoposide treatment. CONCLUSION Topoisomerase inhibitor increased MICA/B mRNA and protein expressions in breast cancer cells, indicating that chemotherapeutic agents might increase the recognizing and killing ability of immunocytes to breast cancer cells. ATM/ATR and NF-κB pathways might be involved in it.
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Affiliation(s)
- Y Zhu
- Department of Oncology, Peking University First Hospital,Beijing 100034, China
| | - Y J Shi
- Department of Hematology,Peking University First Hospital,Beijing 100034, China
| | - Y L Zhao
- Department of Oncology, Peking University First Hospital,Beijing 100034, China
| | - P Zhu
- Department of Hematology,Peking University First Hospital,Beijing 100034, China
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24
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Shi YJ, Lai SJ, Chen QL, Mu D, Li Y, Li XX, Yin WW, Yu HJ. [Analysis on the epidemiological features of human brucellosis in northern and southern areas of China, 2015-2016]. Zhonghua Liu Xing Bing Xue Za Zhi 2017; 38:435-440. [PMID: 28468058 DOI: 10.3760/cma.j.issn.0254-6450.2017.04.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Different epidemiological features of human brucellosis appeared in both northern and southern areas of China. The disease was seen endemic in the northern and dispersal in the southern provinces. Appropriate strategies for brucellosis prevention and control should be developed, according to the different epidemiological characteristics in the northern or southern areas.
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Affiliation(s)
- Y J Shi
- Division of Infectious Disease, Key Laboratory of Surveillance and Early-warning on Infectious Disease, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - S J Lai
- Department of Geography and Environment, University of Southampton, Southampton, SO17 1BJ, UK
| | - Q L Chen
- Division of Infectious Disease, Key Laboratory of Surveillance and Early-warning on Infectious Disease, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - D Mu
- Division of Infectious Disease, Key Laboratory of Surveillance and Early-warning on Infectious Disease, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - Y Li
- Division of Infectious Disease, Key Laboratory of Surveillance and Early-warning on Infectious Disease, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - X X Li
- Division of Infectious Disease, Key Laboratory of Surveillance and Early-warning on Infectious Disease, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - W W Yin
- Division of Infectious Disease, Key Laboratory of Surveillance and Early-warning on Infectious Disease, Chinese Center for Disease Control and Prevention, Beijing 102206, China
| | - H J Yu
- Division of Infectious Disease, Key Laboratory of Surveillance and Early-warning on Infectious Disease, Chinese Center for Disease Control and Prevention, Beijing 102206, China
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25
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Wang HJ, Yu Y, Chen R, Wu YF, Yuan BD, Gong SB, Yu QJ, Lyu B, Shi YJ, Ye MY, Wan BN. Development of beam emission spectroscopy diagnostic on EAST. Rev Sci Instrum 2017; 88:083505. [PMID: 28863624 DOI: 10.1063/1.4997074] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Beam Emission Spectroscopy (BES) diagnostic based on Neutron Beam Injection (NBI) on the Experimental Advanced Superconducting Tokamak has been developed. This system consists of 16 × 8 channels which can diagnose the density fluctuation in a rectangular area of about 20 × 10 cm2 in the cross section, whose radial position is adjustable from the core to edge just by means of changing the angle of the rotation mirror. The spatial resolution is about 1-3 cm according to the diagnosed radial position. The temporal resolution is 1 μs. Space calibration of the diagnostic system is done based on the reversibility of the optical path. The NBI modulation experiment shows the success of BES development.
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Affiliation(s)
- H J Wang
- School of Nuclear Science and Technology, University of Science and Technology of China, No. 96 Jinzhai Road, 230026 Hefei, China
| | - Y Yu
- School of Nuclear Science and Technology, University of Science and Technology of China, No. 96 Jinzhai Road, 230026 Hefei, China
| | - R Chen
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - Y F Wu
- School of Nuclear Science and Technology, University of Science and Technology of China, No. 96 Jinzhai Road, 230026 Hefei, China
| | - B D Yuan
- School of Nuclear Science and Technology, University of Science and Technology of China, No. 96 Jinzhai Road, 230026 Hefei, China
| | - S B Gong
- School of Nuclear Science and Technology, University of Science and Technology of China, No. 96 Jinzhai Road, 230026 Hefei, China
| | - Q J Yu
- School of Nuclear Science and Technology, University of Science and Technology of China, No. 96 Jinzhai Road, 230026 Hefei, China
| | - B Lyu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - Y J Shi
- School of Nuclear Science and Technology, University of Science and Technology of China, No. 96 Jinzhai Road, 230026 Hefei, China
| | - M Y Ye
- School of Nuclear Science and Technology, University of Science and Technology of China, No. 96 Jinzhai Road, 230026 Hefei, China
| | - B N Wan
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
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26
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Shi YJ, Wang JK, Chen QM, Zeng X. [The research progress of CO(2) laser in the treatment of oral lichen planus]. Zhonghua Kou Qiang Yi Xue Za Zhi 2017; 52:390-392. [PMID: 28613065 DOI: 10.3760/cma.j.issn.1002-0098.2017.06.015] [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
Oral lichen planus (OLP) is a common oral mucosal disease. The etiology of OLP is not clear. The treatment of OLP is difficult as some of the OLP patients have little effects to the conventional mucosal treatments. In recent years, laser therapy has been adopted to treat patients with OLP. The CO(2) laser therapy has drawn much attention of doctors and scholars because of its advantages in treating the OLP. This review article mainly discusses the principle, effects and some state-of-the-art progresses in OLP treatment using CO(2) laser.
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Affiliation(s)
- Y J Shi
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China
| | - J K Wang
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China
| | - Q M Chen
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China
| | - X Zeng
- State Key Laboratory of Oral Diseases, Sichuan University, Chengdu 610041, China
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27
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Shi YJ, Sun YF, Gao L, Chen YD, Wang JL, Dan Q, Zhang Y. [Value of fragmented QRS wave in evaluating the prognosis of patients with coronary artery disease]. Zhonghua Yi Xue Za Zhi 2017; 97:3-6. [PMID: 28056281 DOI: 10.3760/cma.j.issn.0376-2491.2017.01.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Objective: The aim of the current study was to investigate the predictive value of fragmented QRS wave ( fQRS) for the prognosis of patients with coronary heart disease (CHD). Methods: A total of 714 consecutive patients with confirmed CHD were included from Department of Cardiology, General Hospital of PLA between January 2013 and January 2014, and were divided into fQRS group and non-fQRS group based on the presence of fQRS wave or not according to Electrocardiograph (ECG). The baseline, ECG characteristic value, the echocardiography results of the patients were compared between the two groups. Cardiac events were recorded in all patients during 12 months' follow-up. Subgroup analysis was also conducted among patients with abnormal Q wave to investigate the association between fQRS and cardiovascular events. Results: A total of 673 patients completed the follow-up, with 533 in fQRS group and 140 in non-fQRS group. The P wave duration in the fQRS group was longer than non-fQRS group [(92±21) vs (82±23)ms, P<0.01]. The left ventricular ejection fraction (LVEF) value in the fQRS group was lower than non-fQRS group (42%±22% vs 49%±15%, P<0.01) according to echocardiography results. The subgroup analysis with abnormal Q wave showed that compared with non-fQRS group, the left ventricular ejection fraction (LVEF) value in the group of fQRS was lower (38%±21% vs 50%±7%, P<0.01). There was statistically significant in the mortality of patients within follow-up period between the two groups (P<0.05), and the survival time in fQRS group was shorter than the non-fQRS group [(28.3±3.4) vs (30.5±1.5)months, P<0.01]. Conclusion: FQRS presence in body surface ECG of CHD patients with abnormal Q wave is a sign for increased risk of cardiovascular events, which can serve as an indicator to identify CHD patients at high risk of death.
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Affiliation(s)
- Y J Shi
- Department of Cardiology, General Hospital of PLA, Beijing 100853, China
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28
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Yin XH, Li YY, Fu J, Jiang D, Feng SY, Gu YQ, Cheng Y, Lyu B, Shi YJ, Ye MY, Wan BN. Improved spatial calibration for the CXRS system on EAST. Rev Sci Instrum 2016; 87:11E539. [PMID: 27910672 DOI: 10.1063/1.4962054] [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: 06/06/2023]
Abstract
A Charge eXchange Recombination Spectroscopy (CXRS) diagnostic system has been developed to measure profiles of ion temperature and rotation since 2014 on EAST. Several techniques have been developed to improve the spatial calibration of the CXRS diagnostic. The sightline location was obtained by measuring the coordinates of three points on each sightline using an articulated flexible coordinate measuring arm when the vessel was accessible. After vacuum pumping, the effect of pressure change in the vacuum vessel was evaluated by observing the movement of the light spot from back-illuminated sightlines on the first wall using the newly developed articulated inspection arm. In addition, the rotation of the periscope after vacuum pumping was derived by using the Doppler shift of neutral beam emission spectra without magnetic field. Combining these techniques, improved spatial calibration was implemented to provide a complete and accurate description of the EAST CXRS system. Due to the effects of the change of air pressure, a ∼0.4° periscope rotation, yielding a ∼20 mm movement of the major radius of observation positions to the lower field side, was derived. Results of Zeeman splitting of neutral beam emission spectra with magnetic field also showed good agreement with the calibration results.
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Affiliation(s)
- X H Yin
- School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230026, China
| | - Y Y Li
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - J Fu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - D Jiang
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - S Y Feng
- School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230026, China
| | - Y Q Gu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - Y Cheng
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - B Lyu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - Y J Shi
- School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230026, China
| | - M Y Ye
- School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230026, China
| | - B N Wan
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
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29
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Yan W, Chen ZY, Jin W, Lee SG, Shi YJ, Huang DW, Tong RH, Wang SY, Wei YN, Ma TK, Zhuang G. Measurement of the electron and ion temperatures by the x-ray imaging crystal spectrometer on joint Texas experimental tokamak. Rev Sci Instrum 2016; 87:11E318. [PMID: 27910481 DOI: 10.1063/1.4960060] [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: 06/06/2023]
Abstract
An x-ray imaging crystal spectrometer has been developed on joint Texas experimental tokamak for the measurement of electron and ion temperatures from the Kα spectra of helium-like argon and its satellite lines. A two-dimensional multi-wire proportional counter has been applied to detect the spectra. The electron and ion temperatures have been obtained from the Voigt fitting with the spectra of helium-like argon ions. The profiles of electron and ion temperatures show the dependence on electron density in ohmic plasmas.
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Affiliation(s)
- W Yan
- State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Z Y Chen
- State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - W Jin
- Center of Interface Dynamics for Sustainability, China Academy of Engineering Physics, Chengdu, Sichuan 610200, People's Republic of China
| | - S G Lee
- National Fusion Research Institute, Daejeon 305-333, South Korea
| | - Y J Shi
- Department of Nuclear Engineering, Seoul National University, Seoul 08826, South Korea
| | - D W Huang
- State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - R H Tong
- State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - S Y Wang
- State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Y N Wei
- State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - T K Ma
- State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - G Zhuang
- State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, People's Republic of China
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30
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Lyu B, Chen J, Hu RJ, Wang FD, Li YY, Fu J, Shen YC, Bitter M, Hill KW, Delgado-Aparicio LF, Pablant N, Lee SG, Ye MY, Shi YJ, Wan BN. Measurement of helium-like and hydrogen-like argon spectra using double-crystal X-ray spectrometers on EAST. Rev Sci Instrum 2016; 87:11E326. [PMID: 27910526 DOI: 10.1063/1.4960504] [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: 06/06/2023]
Abstract
A two-crystal assembly was deployed on the tangential X-ray crystal spectrometer to measure both helium-like and hydrogen-like spectra on EAST. High-quality helium-like and hydrogen-like spectra were observed simultaneously for the first time on one detector for a wide range of plasma parameters. Profiles of line-integrated core ion temperatures inferred from two spectra were consistent. Since tungsten was adopted as the upper divertor material, one tungsten line (W XLIV at 4.017 Å) on the short-wavelength side of the Lyman-α line (Lα1) was identified for typical USN discharges, which was diffracted by a He-like crystal (2d = 4.913 Å). Another possible Fe XXV line (1.85 Å) was observed to be located on the long-wavelength side of resonance line (w), which was diffracted from a H-like crystal (2d = 4.5622 Å) on the second order. Be-like argon lines were also observable that fill the detector space between the He-like and H-like spectra.
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Affiliation(s)
- B Lyu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - J Chen
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - R J Hu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - F D Wang
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - Y Y Li
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - J Fu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - Y C Shen
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
| | - M Bitter
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - K W Hill
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | | | - N Pablant
- Princeton Plasma Physics Laboratory, Princeton, New Jersey 08543, USA
| | - S G Lee
- National Fusion Research Institute, Daejeon 305-333, South Korea
| | - M Y Ye
- School of Nuclear Science and Technology, University of Science and Technology of China, Hefei 230026, China
| | - Y J Shi
- Hefei Science Center, Chinese Academy of Sciences, Hefei 230031, China
| | - B N Wan
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China
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31
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Li YY, Yin XH, Fu J, Jiang D, Feng SY, Lyu B, Shi YJ, Yi Y, Zhou XJ, Hu CD, Ye MY, Wan BN. First measurement of the edge charge exchange recombination spectroscopy on EAST tokamak. Rev Sci Instrum 2016; 87:11E501. [PMID: 27910523 DOI: 10.1063/1.4955279] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
An edge toroidal charge exchange recombination spectroscopy (eCXRS) diagnostic, based on a heating neutral beam injection (NBI), has been deployed recently on the Experimental Advanced Superconducting Tokamak (EAST). The eCXRS, which aims to measure the plasma ion temperature and toroidal rotation velocity in the edge region simultaneously, is a complement to the exiting core CXRS (cCXRS). Two rows with 32 fiber channels each cover a radial range from ∼2.15 m to ∼2.32 m with a high spatial resolution of ∼5-7 mm. Charge exchange emission of Carbon VI CVI at 529.059 nm induced by the NBI is routinely observed, but can be tuned to any interested wavelength in the spectral range from 400 to 700 nm. Double-slit fiber bundles increase the number of channels, the fibers viewing the same radial position are binned on the CCD detector to improve the signal-to-noise ratio, enabling shorter exposure time down to 5 ms. One channel is connected to a neon lamp, which provides the real-time wavelength calibration on a shot-to-shot basis. In this paper, an overview of the eCXRS diagnostic on EAST is presented and the first results from the 2015 experimental campaign will be shown. Good agreements in ion temperature and toroidal rotation are obtained between the eCXRS and cCXRS systems.
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Affiliation(s)
- Y Y Li
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China
| | - X H Yin
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China
| | - J Fu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China
| | - D Jiang
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China
| | - S Y Feng
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China
| | - B Lyu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China
| | - Y J Shi
- School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, China
| | - Y Yi
- School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, China
| | - X J Zhou
- Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China
| | - C D Hu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China
| | - M Y Ye
- School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, China
| | - B N Wan
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, China
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Luo XP, Yuan Y, Shi YJ, Qian DD. [A ten-year clinical study of cracked teeth restored with glass ceramic crowns]. Zhonghua Kou Qiang Yi Xue Za Zhi 2016; 51:583-586. [PMID: 27719700 DOI: 10.3760/cma.j.issn.1002-0098.2016.10.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To evaluate the clinic performance of high strength glass ceramic crowns for the painful cracked teeth during a 10-year observation period. Methods: Forty-two posterior teeth from 36 patients were diagnosed as having a crack, biting painful and sensitivity to cold were selected in the Department of Prosthodontic, Institute and Hospital of Stomatology, Nanjing University Medical School. The lost-wax hot pressed glass ceramic crowns were bonded on the minimally invasive prepared teeth by modern adhesive technology. Patients were interviewed and went through clinic examination after one week, one month, and every six months. Results: The effectiveness of 42 glass ceramic crowns for cracked teeth was evaluated for a mean observation time over 10-year. At the first week, 29(81%) patients were free of pain, three still had sensitivity to cold and chewing pain, three still had sensitivity to cold, one had painful to cold and hot. After one month, two patients still had chewing pain, and one tooth needed endodontic treatment after six months. In 10 years, 2(5%) all ceramic crowns were broken, the other 40 restorations kept good clinical performances with a 10-year survival rate of 95%. Conclusions: The high strength glass ceramic crowns are very effective and successful in treating the cracked teeth and then keep the good mastication function and appearance.
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Affiliation(s)
- X P Luo
- Department of Prosthodontics, Institute and Hospital of Stomatology, Nanjing University Medical School, Nanjing 210008, China
| | - Y Yuan
- Department of Prosthodontics, Institute and Hospital of Stomatology, Nanjing University Medical School, Nanjing 210008, China
| | - Y J Shi
- Department of Prosthodontics, Institute and Hospital of Stomatology, Nanjing University Medical School, Nanjing 210008, China
| | - D D Qian
- Department of Prosthodontics, Institute and Hospital of Stomatology, Nanjing University Medical School, Nanjing 210008, China
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Gao L, Chen YD, Shi YJ, Xue H, Wang JL. [Prediction value of deceleration capacity of rate and GRACE risk score on major adverse cardiac events in patients with acute myocardial infarction]. Zhonghua Xin Xue Guan Bing Za Zhi 2016; 44:583-587. [PMID: 27530942 DOI: 10.3760/cma.j.issn.0253-3758.2016.07.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
OBJECTIVE To investigate the prediction value of deceleration capacity of rate (DC) and GRACE risk score for cardiovascular events in AMI patients. METHODS Consecutive AMI patients with sinus rhythm hospitalized in our department during August 2012 to August 2013 were included in this prospective study. 24-hour ECG Holter monitoring was performed within 1 week, and the DC value was analyzed, GRACE risk score was acquired with the application of GRACE risk score calculator. Patients were followed up for more than 1 year and major adverse cardiac events (MACE) were obtained. Analysised the Kaplan Meier survival according to DC and GRACE score risk stratification respectively. RESULTS A total of 157 patients were enrolled in the study (average age: (58.9±12.7)years old). The average follow-up was (20.54±2.85) months. Mortality during follow-up was significantly higher in patients with DC>2.5 compared to patients with DC≤2.5 (P<0.01). In terms of early warning cardiac death, the area under ROC curve of DC risk stratification was 0.898 (95%CI 0.840-0.940, P<0.01), the sensitivity was 84.6%, and the specificity was 84.0%. The area under ROC curve of GRACE risk stratification was 0.786 (95%CI 0.714-0.847, P<0.01), the sensitivity was 84.6%, and the specificity was 74.3%. In terms of early warning cardiac adverse events, the ROC curve of DC was 0.747(95%CI 0.672-0.813, P<0.01), with the 90.0% sensitivity and 67.7% specificity. The GRACE risk stratification was 0.708 (95%CI 0.652-0.769, P<0.01), with the 63.3% sensitivity and 75.6% specificity. Subgroup analysis showed that mortality during follow-up was significantly higher in high risk patients than those with intermediate and low risk patients according to DC risk stratification in intermediate and low risk patients by GRACE risk stratification (P<0.01). CONCLUSION DC could predict cardiac death and MACE in patients with AMI. DC risk stratification is superior to GRACE risk score on outcome assessment in this AMI patient cohort.
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Affiliation(s)
- L Gao
- Department of Cardiology, General Hospital of People's Liberation Army, Beijing 100853, China
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Wang JL, Chen YD, Shi YJ, Xue H, Zhang WG, Gao L. [Cross-sectional study of differential effects with age on non-invasive central hemodynamics and peripheral arterial stiffness of healthy people in Beijing communities]. Zhonghua Yi Xue Za Zhi 2016; 96:1871-5. [PMID: 27356802 DOI: 10.3760/cma.j.issn.0376-2491.2016.23.019] [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 observe the variation of central hemodynamics and peripheral arterial stiffness in different ages and to investigate the parameters of differential effects in younger individuals (≤60y) and older individuals (>60y). METHODS We conducted a population-based cross-sectional study in eight regions by random cluster sampling, from April to July 2014 in Beijing, China.Central hemodynamics and peripheral arterial stiffness parameters were determined in 861 healthy (372 male), normotensive individuals, aged 20 to 91(56±14) years.The main observed indexes were central systolic blood pressure (cSBP), arterial augmentation index (AI), augmentation pressure (AP), heart-ankle pulse wave velocity (haPWV) and brachial-ankle PWV (baPWV). Subjects were divided into six groups by 10 aged segment.Differences between groups and age tendency were observed. RESULTS The mean values of cSBP, AI, AP, haPWV and baPWV were (113±12) mmHg, (90±18)%, (-5±9) mmHg, (987±144) cm/s and (1 382±254) cm/s, respectively.cSBP, AI, AP, haPWV and baPWV increased with age (P<0.001). In average, cSBP, baPWV and haPWV increased 3 mmHg, 97 cm/s and 62 cm/s by additional 10 years, respectively.cSBP, AI and AP increased slowly after 60 years old, while haPWV and baPWV increased significantly with age (P<0.001). Stepwise regression analysis showed: cSBP was mainly relevant with mean arterial pressure(b=0.990, P<0.001), while baPWV and haPWV were relevant with age(b=8.858, 5.971; P<0.001). AI and AP were associated with height and rest heart rate (b=-0.676, -0.660 and b=-0.361, -0.341, P<0.001). Individuals were divided into two groups by age 60.The age-related changes in AI were significant in under 60-year-old; while the changes in baPWV were more prominent in over 60-year-old.However there was no significant difference in cSBP between two groups. CONCLUSIONS In healthy people, there are obvious differences of age tendency in central hemodynamics and peripheral arterial stiffness parameters.AI might be a good predictor of cardiovascular disease for early stage, especially for early coronary artery disease.
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Affiliation(s)
- J L Wang
- Department of Cardiology, PLA General Hospital, Beijing 100853, China
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Abstract
In the present study, we investigated BMP6 and BMP4 expression in patients with cancer-related anemia (CRA) as well as its relationship with hepcidin and s-HJV. The avidin-biotin system enzyme-linked immunosorbent assay was used to test serum levels of BMP6, BMP4, s-HJV, and hepcidin in 53 cancer patients with anemia and 52 control cancer patients without anemia. Serum levels of BMP6 and hepcidin in the anemia group were 434.53 ± 212.11 ng/mL and 5.68 ± 3.89 μg/L, respectively. In the non-anemia cancer group, serum BMP6 and hepcidin levels were 334.37 ± 171.32 ng/mL and 4.60 ± 2.28 μg/L, which were significantly lower than the levels for the CRA group (P < 0.05). In addition, the serum level of s-HJV was 0.69 ± 0.28 ng/mL in the CRA group, which was significantly lower compared to that for the non-anemia group (1.07 ± 1.00 ng/mL, P < 0.01). There were no significant differences in BMP4 expression between the two groups. BMP6 was negatively correlated with s-HJV and Hb (r = -0.2536 and -0.2949, P < 0.01), but was not correlated with hepcidin. Similarly, BMP4 expression was not correlated with Hb, s-HJV, or hepcidin. Our study shows that patients with CRA had high expression of BMP6 and hepcidin and low expression of s-HJV. BMP6 was found to be negatively correlated with s-HJV; both regulate hepcidin expression and play important roles in the development of anemia.
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Affiliation(s)
- Y J Shi
- Affiliated Taicang Hospital of Suzhou University, Taicang, Jiangsu, China
| | - X T Pan
- Affiliated Taicang Hospital of Suzhou University, Taicang, Jiangsu, China
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An L, Liu J, Li WW, Shi YJ, Lin XH, Yu DM, Deng JB, Ren XQ. Distribution of LIM domain kinase 1 in the olfactory bulb, cerebral cortex, hippocampus, and cerebellum of the App/PS+/- mice. Genet Mol Res 2015; 14:17244-51. [PMID: 26681218 DOI: 10.4238/2015.december.16.24] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
LIM domain kinase 1 (LIMK1), an actin-binding kinase, can phosphorylate and inactivate its substrates, and can regulate long-term memory and synaptic plasticity. Both β-amyloid precursor protein (App) and presenilin (PS) are functional degeneration factors during early neuronal development, and are considered as potential factors that contribute to the development of Alzheimer's disease (AD). However, hardly any information is available about the distribution and expression of LIMK1. Thus, using the App and PS deficient mice, the role of LIMK1 was demonstrated in the absence of App and PS. Our results showed that LIMK1 was present in the nerve fiber layer and external plexiform layer of the olfactory bulb, as well as in the mitral cells and Purkinje cells of the cerebellum in App and PS deficient mice. Additionally, LIMK1 was concentrated in the granule cell layer of the olfactory bulb and cerebellum and LIMK1 positive cells were located in the CA1 region of the hippocampus. Our study indicates that there is a connection between LIMK1 and AD in the mouse model of AD. This might explain neurological problems such as cerebellar ataxia, impaired long-term memory, and impaired synaptic plasticity observed in AD.
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Affiliation(s)
- L An
- Institute of Neurobiology, College of Life Science, Henan University, Kaifeng, Henan, China.,Translational Medicine Center, Huaihe Hospital, Henan University, Kaifeng, Henan, China
| | - J Liu
- Institute of Neurobiology, College of Life Science, Henan University, Kaifeng, Henan, China
| | - W W Li
- Institute of Neurobiology, College of Life Science, Henan University, Kaifeng, Henan, China
| | - Y J Shi
- Institute of Neurobiology, College of Life Science, Henan University, Kaifeng, Henan, China
| | - X H Lin
- Translational Medicine Center, Huaihe Hospital, Henan University, Kaifeng, Henan, China
| | - D M Yu
- Institute of Neurobiology, College of Life Science, Henan University, Kaifeng, Henan, China
| | - J B Deng
- Institute of Neurobiology, College of Life Science, Henan University, Kaifeng, Henan, China
| | - X Q Ren
- Translational Medicine Center, Huaihe Hospital, Henan University, Kaifeng, Henan, China
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Badran I, Shi YJ. Promotion of exocyclic bond cleavages in the decomposition of 1,3-disilacyclobutane in the presence of a metal filament. J Phys Chem A 2015; 119:590-600. [PMID: 25560235 DOI: 10.1021/jp511716x] [Citation(s) in RCA: 8] [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: 12/19/2022]
Abstract
The primary decomposition of 1,3-disilacyclobutane (DSCB) on a tungsten filament and its secondary gas-phase reactions in a hot-wire chemical vapor deposition (CVD) reactor have been studied using laser ionization mass spectrometry. Under the collision-free conditions, DSCB decomposes on the W filament to produce H2 molecules with an activation energy of 43.6 ± 4.1 kJ·mol(-1). With the help of the isotope labeling and chemical trapping methods, the mechanistic details in the secondary gas-phase reactions important in the hot-wire CVD reactor setup have been examined. The dominant pathway has been demonstrated to be the insertion of the cyclic 1,3-disilacyclobut-1-ylidene, generated by exocyclic Si-H bond rupture, into the Si-H bond in DSCB to form 1,1'-bis(1,3-disilacyclobutane) (174 amu). The successful trapping of 1,3-disilacyclobut-1-ylidene by both 1,3-butadiene and trimethylsilane provides compelling evidence for the existence of this cyclic silylene species in the hot-wire CVD reactor with DSCB. Other reactions operating in the reactor include the DSCB cycloreversion to form silene and the ring opening of DSCB via 1,2-H shift to produce silene/methylsilylene and 1-methylsilene/silylene. The introduction of an additional Si atom in the four-membered ring monosilacyclobutane molecule has caused two major changes in the reaction chemistry assumed by DSCB: (1) The endocyclic cycloreversion reactions that dominate in the decomposition of monosilacyclobutane molecules only play a much less important role in the dissociation of DSCB; and (2) the exocyclic bond cleavages are promoted in DSCB due to the ring stabilization caused by the introduction of one additional Si atom.
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Affiliation(s)
- I Badran
- Department of Chemistry, University of Calgary , Calgary, Alberta T2N 1 N4, Canada
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Lyu B, Wang FD, Pan XY, Chen J, Fu J, Li YY, Bitter M, Hill KW, Delgado-Aparicio LF, Pablant N, Lee SG, Shi YJ, Ye MY, Wan BN. Upgrades of imaging x-ray crystal spectrometers for high-resolution and high-temperature plasma diagnostics on EAST. Rev Sci Instrum 2014; 85:11E406. [PMID: 25430313 DOI: 10.1063/1.4886387] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Upgrade of the imaging X-ray crystal spectrometers continues in order to fulfill the high-performance diagnostics requirements on EAST. For the tangential spectrometer, a new large pixelated two-dimensional detector was deployed on tokamaks for time-resolved X-ray imaging. This vacuum-compatible detector has an area of 83.8 × 325.3 mm(2), a framing rate over 150 Hz, and water-cooling capability for long-pulse discharges. To effectively extend the temperature limit, a double-crystal assembly was designed to replace the previous single crystals for He-like argon line measurement. The tangential spectrometer employed two crystal slices attached to a common substrate and part of He- and H-like Ar spectra could be recorded on the same detector when crystals were chosen to have similar Bragg angles. This setup cannot only extend the measurable Te up to 10 keV in the core region, but also extend the spatial coverage since He-like argon ions will be present in the outer plasma region. Similarly, crystal slices for He-like iron and argon spectra were adopted on the poloidal spectrometer. Wavelength calibration for absolute rotation velocity measurement will be studied using cadmium characteristic L-shell X-ray lines excited by plasma radiation. A Cd foil is placed before the crystal and can be inserted and retracted for in situ wavelength calibration. The Geant4 code was used to estimate X-ray fluorescence yield and optimize the thickness of the foil.
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Affiliation(s)
- B Lyu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China
| | - F D Wang
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China
| | - X Y Pan
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China
| | - J Chen
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China
| | - J Fu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China
| | - Y Y Li
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China
| | - M Bitter
- Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, New Jersey 08543-0451, USA
| | - K W Hill
- Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, New Jersey 08543-0451, USA
| | - L F Delgado-Aparicio
- Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, New Jersey 08543-0451, USA
| | - N Pablant
- Princeton Plasma Physics Laboratory, P.O. Box 451, Princeton, New Jersey 08543-0451, USA
| | - S G Lee
- National Fusion Research Institute, 52 Eoeun-Dong, Yusung-Gu, Daejeon 305-333, South Korea
| | - Y J Shi
- School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - M Y Ye
- School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - B N Wan
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China
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Yan W, Chen ZY, Jin W, Huang DW, Ding YH, Li JC, Zhang XQ, Lee SG, Shi YJ, Zhuang G. Wavelength calibration of x-ray imaging crystal spectrometer on Joint Texas Experimental Tokamak. Rev Sci Instrum 2014; 85:11E416. [PMID: 25430323 DOI: 10.1063/1.4891058] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The wavelength calibration of x-ray imaging crystal spectrometer is a key issue for the measurements of plasma rotation. For the lack of available standard radiation source near 3.95 Å and there is no other diagnostics to measure the core rotation for inter-calibration, an indirect method by using tokamak plasma itself has been applied on joint Texas experimental tokamak. It is found that the core toroidal rotation velocity is not zero during locked mode phase. This is consistent with the observation of small oscillations on soft x-ray signals and electron cyclotron emission during locked-mode phase.
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Affiliation(s)
- W Yan
- School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Z Y Chen
- School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - W Jin
- School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - D W Huang
- School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - Y H Ding
- School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - J C Li
- School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - X Q Zhang
- School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, People's Republic of China
| | - S G Lee
- National Fusion Research Institute, Daejeon 305-333, South Korea
| | - Y J Shi
- National Fusion Research Institute, Daejeon 305-333, South Korea
| | - G Zhuang
- School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan, People's Republic of China
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Li YY, Fu J, Lyu B, Du XW, Li CY, Zhang Y, Yin XH, Yu Y, Wang QP, von Hellermann M, Shi YJ, Ye MY, Wan BN. Development of the charge exchange recombination spectroscopy and the beam emission spectroscopy on the EAST tokamak. Rev Sci Instrum 2014; 85:11E428. [PMID: 25430335 DOI: 10.1063/1.4890408] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Charge eXchange Recombination Spectroscopy (CXRS) and Beam Emission Spectroscopy (BES) diagnostics based on a heating neutral beam have recently been installed on EAST to provide local measurements of ion temperature, velocity, and density. The system design features common light collection optics for CXRS and BES, background channels for the toroidal views, multi-chord viewing sightlines, and high throughput lens-based spectrometers with good signal to noise ratio for high time resolution measurements. Additionally, two spectrometers each has a tunable grating to observe any wavelength of interest are used for the CXRS and one utilizes a fixed-wavelength grating to achieve higher diffraction efficiency for the BES system. A real-time wavelength correction is implemented to achieve a high-accuracy wavelength calibration. Alignment and calibration are performed. Initial performance test results are presented.
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Affiliation(s)
- Y Y Li
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China
| | - J Fu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China
| | - B Lyu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China
| | - X W Du
- School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - C Y Li
- School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Y Zhang
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China
| | - X H Yin
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China
| | - Y Yu
- School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Q P Wang
- School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - M von Hellermann
- FOM-Institute for Plasma Physics "Rijnhuizen," Association EURATOM, Trilateral Euregio Cluster, 3430BE Nieuwegein, The Netherlands
| | - Y J Shi
- School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - M Y Ye
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China
| | - B N Wan
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China
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Fu J, Li YY, Lyu B, Sheng P, Zhang Y, Yin XH, Shi YJ, Yu Y, Ye MY, Wan BN. Preparations for the motional Stark effect diagnostic on EAST. Rev Sci Instrum 2014; 85:11D410. [PMID: 25430173 DOI: 10.1063/1.4893996] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Measurement and control of the current profile is essential for high performance and steady state operation of Experimental Advanced Superconducting Tokamak (EAST). For this purpose, a conventional Motional Stark Effect (MSE) diagnostics utilizing photoelastic modulators is proposed and investigated. The pilot experiment includes one channel to verify the feasibility of MSE, whose sightline intersects with Neutral Beam Injection at major radius of R = 2.12 m. A beam splitter is adopted for simultaneous measurements of Stark multiplets and their polarization directions. A simplified simulation code was also developed to explore the Stark splitting spectra. Finally, the filter is optimized based on the viewing geometry and neutral beam parameters.
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Affiliation(s)
- J Fu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China
| | - Y Y Li
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China
| | - B Lyu
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China
| | - P Sheng
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China
| | - Y Zhang
- School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - X H Yin
- School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Y J Shi
- School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - Y Yu
- School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - M Y Ye
- School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230026, China
| | - B N Wan
- Institute of Plasma Physics, Chinese Academy of Sciences, Hefei, Anhui 230031, China
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Toukabri R, Shi YJ. Dominance of Silylene Chemistry in the Decomposition of Monomethylsilane in the Presence of a Heated Metal Filament. J Phys Chem A 2014; 118:3866-74. [DOI: 10.1021/jp502795u] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- R. Toukabri
- Department
of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
| | - Y. J. Shi
- Department
of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, Alberta T2N 1N4, Canada
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Jin W, Chen ZY, Huang DW, Li QL, Yan W, Luo YH, Lee SG, Shi YJ, Huang YH, Tong RH, Yang ZJ, Rao B, Ding YH, Zhuang G. Upgraded high time-resolved x-ray imaging crystal spectroscopy system for J-TEXT ohmic plasmas. Rev Sci Instrum 2014; 85:023509. [PMID: 24593363 DOI: 10.1063/1.4864147] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
This paper presents the upgraded x-ray imaging crystal spectrometer (XICS) system on Joint Texas Experimental Tokamak (J-TEXT) tokamak and the latest experimental results obtained in last campaign. With 500 Hz frame rate of the new Pilatus detector and 5 cm × 10 cm spherically bent crystal, the XICS system can provide core electron temperature (Te), core ion temperature (Ti), and plasma toroidal rotation (VΦ) with a maximum temporal resolution of 2 ms for J-TEXT pure ohmic plasmas. These parameters with high temporal resolution are very useful in tokamak plasma research, especially for rapidly changed physical processes. The experimental results from the upgraded XICS system are presented.
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Affiliation(s)
- W Jin
- State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - Z Y Chen
- State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - D W Huang
- State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - Q L Li
- State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - W Yan
- State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - Y H Luo
- State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - S G Lee
- National Fusion Research Institute, Daejeon 305-333, South Korea
| | - Y J Shi
- National Fusion Research Institute, Daejeon 305-333, South Korea
| | - Y H Huang
- State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - R H Tong
- State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - Z J Yang
- State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - B Rao
- State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - Y H Ding
- State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
| | - G Zhuang
- State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
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Toukabri R, Alkadhi N, Shi YJ. Formation of Methyl Radicals from Decomposition of Methyl-Substituted Silanes over Tungsten and Tantalum Filament Surfaces. J Phys Chem A 2013; 117:7697-704. [DOI: 10.1021/jp404882t] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- R. Toukabri
- Department of Chemistry, University of Calgary, Calgary, Alberta,
Canada T2N 1N4
| | - N. Alkadhi
- Department of Chemistry, University of Calgary, Calgary, Alberta,
Canada T2N 1N4
| | - Y. J. Shi
- Department of Chemistry, University of Calgary, Calgary, Alberta,
Canada T2N 1N4
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Affiliation(s)
- I Badran
- Department of Chemistry, University of Calgary, Alberta, Canada
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Shi YJ, Lee SG, Hill KW, Bitter M. Inversion technique to obtain local rotation velocity and ion temperature from line-integrated measurements for elongated tokamak plasma. Rev Sci Instrum 2012; 83:10D717. [PMID: 23126891 DOI: 10.1063/1.4733732] [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: 06/01/2023]
Abstract
An inversion technique is presented to calculate local toroidal and poloidal rotation velocity and ion temperature from line-integrated measurements of impurity lines by a matrix method. The effects of the rotation velocity on the ion temperature are analyzed in particular. An accurate inversion formula for the ion temperature is obtained. Several experimental geometries or configurations of line-integrated diagnostics in tokamaks are presented. For a plasma that is up-down symmetric, both the toroidal rotation velocity and poloidal rotation velocity can be deduced from one special line-integrated measurement.
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Affiliation(s)
- Y J Shi
- National Fusion Research Institute, Daejeon, Korea.
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47
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Jin W, Chen ZY, Cen YS, Lee SG, Shi YJ, Ding YH, Yang ZJ, Wang ZJ, Zhuang G. Tangential x-ray imaging crystal spectrometer on J-TEXT tokamak. Rev Sci Instrum 2012; 83:10E502. [PMID: 23127009 DOI: 10.1063/1.4729504] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
A tangential x-ray imaging crystal spectrometer (XICS) has been developed for the J-TEXT tokamak to measure the ion temperature and the plasma toroidal rotation velocity. The resonance spectral line and its satellites of Ar XVII in the ranges of 3.94 Å-4.0 Å are detected. A spherically bent quartz crystal with 2d = 4.913 Å is used in this system. The crystal has a dimension of 9 cm high and 3 cm wide and the radius of curvature 3823 mm. The XICS is designed to receive emission of Ar XVII from -10 cm to +10 cm region with a spatial resolution of 3.1 cm in the vertical direction considering the parameters of the J-TEXT plasma. The XICS has a tangential angle of 27° with respect to toroidal direction in the magnetic axis. A two-dimensional 100 mm by 300 mm multi-wire proportional counter is applied to detect the spectra.
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Affiliation(s)
- W Jin
- State Key Laboratory of Advanced Electromagnetic Engineering and Technology, College of Electrical and Electronic Engineering, Huazhong University of Science and Technology, Wuhan 430074, People's Republic of China
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Badran I, Forster TD, Roesler R, Shi YJ. Competition of Silene/Silylene Chemistry with Free Radical Chain Reactions Using 1-Methylsilacyclobutane in the Hot-Wire Chemical Vapor Deposition Process. J Phys Chem A 2012; 116:10054-62. [DOI: 10.1021/jp3055558] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- I. Badran
- Department of Chemistry, University of Calgary, Calgary, Alberta
T2N 1N4, Canada
| | - T. D. Forster
- Department of Chemistry, University of Calgary, Calgary, Alberta
T2N 1N4, Canada
| | - R. Roesler
- Department of Chemistry, University of Calgary, Calgary, Alberta
T2N 1N4, Canada
| | - Y. J. Shi
- Department of Chemistry, University of Calgary, Calgary, Alberta
T2N 1N4, Canada
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Shi YJ, Li XM, Toukabri R, Tong L. Effect of Si–H Bond on the Gas-Phase Chemistry of Trimethylsilane in the Hot Wire Chemical Vapor Deposition Process. J Phys Chem A 2011; 115:10290-8. [DOI: 10.1021/jp203966h] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Y. J. Shi
- Department of Chemistry, University of Calgary, Calgary, Alberta, T2N 1N4 Canada
| | - X. M. Li
- Department of Chemistry, University of Calgary, Calgary, Alberta, T2N 1N4 Canada
| | - R. Toukabri
- Department of Chemistry, University of Calgary, Calgary, Alberta, T2N 1N4 Canada
| | - L. Tong
- Department of Chemistry, University of Calgary, Calgary, Alberta, T2N 1N4 Canada
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Tong L, Shi YJ. Gas-phase reaction chemistry of 1,1-dimethyl-1-silacyclobutane as a precursor gas in the hot-wire chemical vapor deposition process — Formation of tetramethylsilane and trimethylsilane. CAN J CHEM 2011. [DOI: 10.1139/v10-147] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The secondary gas-phase reaction products of 1,1-dimethyl-1-silacyclobutane (DMSCB) and its isotopomer, 1,1-di(perdeuteratedmethyl)-1-silacyclobutane (DMSCB-d6), in a hot-wire chemical vapour deposition reactor were investigated using vacuum UV laser single photon ionization with time-of-flight mass spectrometry. Dimethylsilylene, one of the primary decomposition products, undergoes π-type addition across the double and triple C–C bond and an insertion reaction into the Si–H bond. A short-chain reaction mechanism, initiated by methyl radicals produced in the primary decomposition, is found to exist for both the source DMSCB molecule and its stable secondary products. The formation of tetramethylsilane and trimethylsilane via the reaction of 1,1-dimethylsilene with a methyl radical and an H2 molecule, respectively, has been demonstrated. These are two new reaction channels involving 1,1-dimethylsilene in secondary gas-phase reactions.
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Affiliation(s)
- L. Tong
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada
| | - Y. J. Shi
- Department of Chemistry, University of Calgary, 2500 University Drive NW, Calgary, AB T2N 1N4, Canada
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