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Dong XY, Zou YX, Lyu FF, Yang WH, Zhang HL, Niu YH, Wang HJ, Guo R, Wang X, Li L, Lin ZH, Luo L, Lu DL, Lu Q, Liu HM, Chen LN. [A multicenter study on respiratory pathogen detection with Mycoplasma pneumoniae pneumonia in children]. Zhonghua Er Ke Za Zhi 2024; 62:310-316. [PMID: 38527500 DOI: 10.3760/cma.j.cn112140-20240117-00054] [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: 03/27/2024]
Abstract
Objective: To analyze the status of respiratory pathogen detection and the clinical features in children with Mycoplasma pneumoniae pneumonia (MPP). Methods: A prospective, multicenter study was conducted to collect clinical data, including medical history, laboratory examinations and multiplex PCR tests of children diagnosed with MPP from 4 hospitals in China between November 15th and December 20th, 2023. The multiplex PCR results and clinical characteristics of MPP children in different regions were analyzed. The children were divided into severe and mild groups according to the severity of the disease. Patients in the severe group were further divided into Mycoplasma pneumoniae (MP) alone and Multi-pathogen co-detection groups based on whether other pathogens were detected besides MP, to analyze the influence of respiratory pathogen co-detection rate on the severity of the disease. Mann-Whitney rank sum test and Chi-square test were used to compare data between independent groups. Results: A total of 298 children, 136 males and 162 females, were enrolled in this study, including 204 children in the severe group with an onset age of 7.0 (6.0, 8.0) years, and 94 children in the mild group with an onset age of 6.5 (4.0, 7.8) years. The level of C-reactive protein, D-dimer, lactic dehydrogenase (LDH) were significantly higher (10.0 (5.0, 18.0) vs. 5.0 (5.0, 7.5) mg/L, 0.6 (0.4, 1.1) vs. 0.5 (0.3, 0.6) mg/L, 337 (286, 431) vs. 314 (271, 393) U/L, Z=2.02, 2.50, 3.05, all P<0.05), and the length of hospitalization was significantly longer in the severe group compared with those in mild group (6.0 (6.0, 7.0) vs. 5.0 (4.0, 6.0) d, Z=4.37, P<0.05). The time from onset to admission in severe MPP children was significantly shorter than that in mild MPP children (6.0 (5.0, 9.5) vs. 9.0 (7.0, 13.0) d, Z=2.23, P=0.026). All patients completed the multiplex PCR test, with 142 cases (47.7%) MPP children detected with 21 pathogens including adenovirus 25 cases (8.4%), human coronavirus 23 cases (7.7%), rhinovirus 21 cases (7.0%), Streptococcus pneumoniae 21 cases (7.0%), influenza A virus 18 cases (6.0%). The pathogens with the highest detection rates in Tianjin, Shanghai, Wenzhou and Chengdu were Staphylococcus aureus at 10.7% (8/75), adenovirus at 13.0% (10/77), adenovirus at 15.3% (9/59), and both rhinovirus and Haemophilus influenzae at 11.5% (10/87) each. The multi-pathogen co-detection rate in severe MPP children was significantly higher than that in mild MPP group (52.9% (108/204) vs. 36.2% (34/94), χ²=10.62,P=0.005). Among severe MPP children, there are 89 cases in the multi-pathogen co-detection group and 73 cases in the simple MPP group. The levels of LDH, D-dimer and neutrophil counts in the multi-pathogen co-detection group were significantly higher than those in the simple MPP group (348 (284, 422) vs. 307 (270, 358) U/L, 0.8 (0.5, 1.5) vs. 0.6 (0.4, 1.0) mg/L, 4.99 (3.66, 6.89)×109 vs. 4.06 (2.91, 5.65)×109/L, Z=5.17, 4.99, 6.11, all P<0.05). Conclusions: The co-detection rate of respiratory pathogens, LDH and D-dimer in children with severe MPP were higher than those with mild MPP. Among severe MPP children the stress response of children in co-detection group was more serious than that of children with simple MPP.
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Affiliation(s)
- X Y Dong
- Department of Pulmonology, Shanghai Children's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200062, China
| | - Y X Zou
- Department of Pulmonology, Tianjin Children's Hospital (Children's Hospital of Tianjin University), Machang District, Tianjin 300074, China
| | - F F Lyu
- Department of Pediatric Respiratory Medicine, the Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, China
| | - W H Yang
- Department of Pediatric Pulmonology and Immunology, West China Second University Hospital, Sichuan University, Chengdu 610041, China
| | - H L Zhang
- Department of Pediatric Respiratory Medicine, the Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, China
| | - Y H Niu
- Department of Pulmonology, Shanghai Children's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200062, China
| | - H J Wang
- Department of Pulmonology, Shanghai Children's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200062, China
| | - R Guo
- Department of Pulmonology, Tianjin Children's Hospital (Children's Hospital of Tianjin University), Machang District, Tianjin 300074, China
| | - X Wang
- Department of Pulmonology, Tianjin Children's Hospital (Children's Hospital of Tianjin University), Machang District, Tianjin 300074, China
| | - L Li
- Department of Pulmonology, Tianjin Children's Hospital (Children's Hospital of Tianjin University), Machang District, Tianjin 300074, China
| | - Z H Lin
- Department of Pediatric Respiratory Medicine, the Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, China
| | - L Luo
- Department of Pediatric Pulmonology, Yaan People's Hospital, Yaan 625000, China
| | - D L Lu
- Department of Pediatric Pulmonology and Immunology, West China Second University Hospital, Sichuan University, Chengdu 610041, China
| | - Q Lu
- Department of Pulmonology, Shanghai Children's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200062, China
| | - H M Liu
- Department of Pediatric Pulmonology and Immunology, West China Second University Hospital, Sichuan University, Chengdu 610041, China
| | - L N Chen
- Department of Pediatric Pulmonology and Immunology, West China Second University Hospital, Sichuan University, Chengdu 610041, China
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Zhao SY, Liu HM, Lu Q, Liu XC, Hong JG, Liu EM, Zou YX, Yang M, Chen ZM, Zhang HL, Zhao DY, Zhang XB, Yin Y, Dong XY, Lu XX, Liu JR, Chen LN. [Interpretation of key points in diagnosis and treatment of Mycoplasma pneumoniae pneumonia in children (November 2023)]. Zhonghua Er Ke Za Zhi 2024; 62:108-113. [PMID: 38228509 DOI: 10.3760/cma.j.cn112140-20231120-00382] [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: 01/18/2024]
Affiliation(s)
- S Y Zhao
- Department of No.2 Respiratory Medicine, Beijing Children's Hospital, Capital Medical University, National Clinical Research Center for Respiratory Diseases, National Center for Children's Health, Beijing 100045, China
| | - H M Liu
- Department of Pediatric Pulmonology and Immunology, West China Second University Hospital, Sichuan University, Chengdu 610041, China
| | - Q Lu
- Department of Pulmonology, Shanghai Children's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200062, China
| | - X C Liu
- Department of No.2 Respiratory Medicine, Beijing Children's Hospital, Capital Medical University, National Clinical Research Center for Respiratory Diseases, National Center for Children's Health, Beijing 100045, China
| | - J G Hong
- Department of Pediatrics, Shanghai General Hospital, Shanghai Jiao Tong University, School of Medicine, Shanghai 200080, China
| | - E M Liu
- Department of Respiratory, Children's Hospital of Chongqing Medical University, Chongqing 400014, China
| | - Y X Zou
- Department of Pulmonology, Tianjin Children's Hospital (Children's Hospital of Tianjin University), Machang Compus, Tianjin 300074, China
| | - M Yang
- Department of Pharmacy, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing 100045, China
| | - Z M Chen
- Department of Pulmonology, Children's Hospital, Zhejiang University School of Medicine, Hangzhou 310052, China
| | - H L Zhang
- Department of Pediatric Respiratory Medicine, the Second Affiliated Hospital & Yuying Children's Hospital of Wenzhou Medical University, Wenzhou 325027, China
| | - D Y Zhao
- Department of Respiratory Medicine, Children's Hospital of Nanjing Medical University, Nanjing 210008, China
| | - X B Zhang
- Department of Respiratory Disease, Children's Hospital of Fudan University, Shanghai 201102, China
| | - Y Yin
- Department of Respiratory Medicine, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai 200062, China
| | - X Y Dong
- Department of Pulmonology, Shanghai Children's Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200062, China
| | - X X Lu
- Department of Respiratory Medicine, Wuhan Children's Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430015, China
| | - J R Liu
- Department of No.2 Respiratory Medicine, Beijing Children's Hospital, Capital Medical University, National Clinical Research Center for Respiratory Diseases, National Center for Children's Health, Beijing 100045, China
| | - L N Chen
- Department of Pediatric Pulmonology and Immunology, West China Second University Hospital, Sichuan University, Chengdu 610041, China
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Hu BH, Huang XP, Yu XP, Chen LN, Dai LY, Mao GC. [Two cases of airway dysfunction related to diacetyl exposure]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2023; 41:222-224. [PMID: 37006150 DOI: 10.3760/cma.j.cn121094-20220210-00062] [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] [Grants] [Subscribe] [Scholar Register] [Indexed: 04/04/2023]
Abstract
Occupational exposure to diacetyl can lead to bronchiolitis obliterans. In this paper, two patients with severe obstructive ventilation disorder who were exposed to diacetyl at a fragrance and flavours factory were analyzed. The clinical manifestations were cough and shortness of breath. One of them showed Mosaic shadows and uneven perfusion in both lungs on CT, while the other was normal. Field investigation found that 4 of the 8 workers in the factory were found to have obstructive ventilation disorder, and 2 had small airway dysfunction. This paper summarizes the diagnostic process of patients in order to improve the understanding of airway dysfunction caused by occupational exposure to diacetyl and promote the development of relevant standards.
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Affiliation(s)
- B H Hu
- Department of Preventive Health Care, Ningbo First Hospital, Ningbo 315010, China
| | - X P Huang
- Department of Respiratory and Critical Care, Ningbo First Hospital, Ningbo 315010, China
| | - X P Yu
- Department of Preventive Health Care, Ningbo First Hospital, Ningbo 315010, China
| | - L N Chen
- Department of Respiratory and Critical Care, Ningbo First Hospital, Ningbo 315010, China
| | - L Y Dai
- Department of Preventive Health Care, Ningbo First Hospital, Ningbo 315010, China
| | - G C Mao
- Institute of Environmental and Occupational Health, Ningbo Center for Disease Control, Ningbo 315000, China
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Wang J, Fu Y, Zhao ZG, Zhang LJ, Chen LN. [A case of peripheral hypoglossal schwannoma in child]. Zhonghua Er Bi Yan Hou Tou Jing Wai Ke Za Zhi 2022; 57:1508-1510. [PMID: 36707960 DOI: 10.3760/cma.j.cn115330-20220624-00375] [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: 01/29/2023]
Affiliation(s)
- J Wang
- Division of Pediatric Pulmonology and Immunology, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu 610041, China
| | - Y Fu
- Department of Otolaryngology, Zhejiang Key Laboratory of Genetic Defects and Developmental Disorders, Children's Hospital Affiliated to Zhejiang University School of Medicine,Hangzhou 310051, China
| | - Z G Zhao
- Department of Otolaryngology, Zhejiang Key Laboratory of Genetic Defects and Developmental Disorders, Children's Hospital Affiliated to Zhejiang University School of Medicine,Hangzhou 310051, China
| | - L J Zhang
- Department of Otolaryngology, Zhejiang Key Laboratory of Genetic Defects and Developmental Disorders, Children's Hospital Affiliated to Zhejiang University School of Medicine,Hangzhou 310051, China
| | - L N Chen
- Division of Pediatric Pulmonology and Immunology, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu 610041, China
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Zhou YL, Liu JR, Yi QW, Chen LN, Han ZY, Xu CD, Liu SY, Hao CL, Liu J, Li QL, Wang LJ, Wang C, Che GH, Zhang YY, Tong L, Liu YQ, Zhao SY, Zheng YJ, Li S, Liu HM, Chang J, Zhao DY, Zou YX, Zhang XX, Nong GM, Zhang HL, Pan JL, Chen YN, Dong XY, Zhang YF, Wang YS, Yang DH, Lu Q, Chen ZM. [A multicenter retrospective study on the etiology of necrotizing pneumonia in children]. Zhonghua Er Ke Za Zhi 2021; 59:658-664. [PMID: 34333918 DOI: 10.3760/cma.j.cn112140-20210126-00072] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To investigate the etiology of necrotizing pneumonia (NP) in children and the clinical characteristics of NP caused by different pathogens in China. Methods: A retrospective, case-control study was performed in children with NP who were admitted to 13 hospitals in China from January 2008 to December 2019. The demographic and clinical information, laboratory data, etiological and radiological findings were analyzed. The data were divided into three groups based on the following years: 2008-2011, 2012-2015 and 2016-2019, and the distribution characteristics of the pathogens in different period were compared. Meanwhile, the pathogens of pediatric NP in the southern and northern China were compared. And the clinical characteristics of the Mycoplasma pneumoniae (MP) NP and the bacterial NP were also compared. T-test or Mann-Whitney nonparametric test was used for comparison of numerical variables, and χ2 test was used for categorical variables. Results: A total of 494 children with NP were enrolled, the median ages were 4.7 (0.1-15.3) years, including 272 boys and 222 girls. Among these patients, pathogens were identified in 347 cases and the pathogen was unclear in the remaining 147 cases. The main pathogens were MP (238 cases), Streptococcus pneumoniae (SP) (61 cases), Staphylococcus aureus (SA) (51 cases), Pseudomonas aeruginosa (13 cases), Haemophilus influenzae (10 cases), adenovirus (10 cases), and influenza virus A (7 cases), respectively. MP was the most common pathogen in all three periods and the proportion increased yearly. The proportion of MP in 2016-2019 was significantly higher than that in 2012-2015 (52.1% (197/378) vs. 36.8% (32/87), χ2=6.654, P=0.010), while there was no significant difference in the proportion of MP in 2012-2015 and that in 2008-2011 (36.8% (32/87) vs. 31.0% (9/29), χ²=0.314, P=0.575).Regarding the regional distribution, 342 cases were in the southern China and 152 in the northern China. Also, MP was the most common pathogen in both regions, but the proportion of MP was higher and the proportion of SP was lower in the north than those in the south (60.5% (92/152) vs. 42.7% (146/342), χ2=13.409, P<0.010; 7.9% (12/152) vs. 14.3% (49/342), χ2=4.023, P=0.045). Comparing the clinical characteristics of different pathogens, we found that fever and cough were the common symptoms in both single MP and single bacterial groups, but chest pain was more common (17.0% (34/200) vs. 6.1% (6/98), χ2=6.697, P=0.010) while shortness of breath and wheezing were less common in MP group (16.0% (32/200) vs. 60.2% (59/98), χ2=60.688, P<0.01; 4.5% (9/200) vs. 21.4% (21/98), χ2=20.819, P<0.01, respectively). The white blood cell count, C-reactive protein and procalcitonin in the bacterial group were significantly higher than those in the MP group (14.7 (1.0-67.1)×109/L vs. 10.5 (2.5-32.2)×109/L, 122.5 (0.5-277.3) mg/L vs. 51.4 (0.5-200.0) g/L, 2.13 (0.05-100.00) μg/L vs. 0.24 (0.01-18.85) μg/L, Z=-3.719, -5.901 and -7.765, all P<0.01). Conclusions: The prevalence of pediatric NP in China shows an increasing trend during the past years. MP, SP and SA are the main pathogens of NP, and the most common clinical symptoms are fever and cough. The WBC count, C-reactive protein and procalcitonin in bacterial NP are significantly higher than those caused by MP.
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Affiliation(s)
- Y L Zhou
- Department of Pulmonology, Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou 310052, China
| | - J R Liu
- Department No.2 of Respiratory Medicine, Beijing Children's Hospital, Capital Medical University, Beijing 100045, China
| | - Q W Yi
- Department of Pulmonology, Shenzhen Children's Hospital, Shenzhen 518038, China
| | - L N Chen
- Division of Pediatric Pulmonology and Immunology, West China Second University Hospital, Sichuan University, Chengdu 610041, China
| | - Z Y Han
- Department of Pulmonology, Children's Hospital of Shanxi Province, Taiyuan 030013, China
| | - C D Xu
- Department of Pulmonology, Children's Hospital of Nanjing Medical University, Nanjing 210019, China
| | - S Y Liu
- Department of the Second Respiratory, Tianjin Children's Hospital, Tianjin 300074, China
| | - C L Hao
- Department of Pulmonology, Children's Hospital of Soochow University, Suzhou 215003, China
| | - J Liu
- Department of Pediatrics, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
| | - Q L Li
- Department of Pediatric Respiratory Disease, the Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou 325027, China
| | - L J Wang
- First Department of Respiratory Medicine, Xi'an Children's Hospital, Xi'an 710003, China
| | - C Wang
- Department of Respiratory, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai 200062, China
| | - G H Che
- Department of Pediatrics, Second Affiliated Hospital of Jilin University, Changchun 130000, China
| | - Y Y Zhang
- Department of Pulmonology, Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou 310052, China
| | - L Tong
- Department of Pulmonology, Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou 310052, China
| | - Y Q Liu
- Department No.2 of Respiratory Medicine, Beijing Children's Hospital, Capital Medical University, Beijing 100045, China
| | - S Y Zhao
- Department No.2 of Respiratory Medicine, Beijing Children's Hospital, Capital Medical University, Beijing 100045, China
| | - Y J Zheng
- Department of Pulmonology, Shenzhen Children's Hospital, Shenzhen 518038, China
| | - S Li
- Division of Pediatric Pulmonology and Immunology, West China Second University Hospital, Sichuan University, Chengdu 610041, China
| | - H M Liu
- Division of Pediatric Pulmonology and Immunology, West China Second University Hospital, Sichuan University, Chengdu 610041, China
| | - J Chang
- Department of Pulmonology, Children's Hospital of Shanxi Province, Taiyuan 030013, China
| | - D Y Zhao
- Department of Pulmonology, Children's Hospital of Nanjing Medical University, Nanjing 210019, China
| | - Y X Zou
- Department of the Second Respiratory, Tianjin Children's Hospital, Tianjin 300074, China
| | - X X Zhang
- Department of Pulmonology, Children's Hospital of Soochow University, Suzhou 215003, China
| | - G M Nong
- Department of Pediatrics, the First Affiliated Hospital of Guangxi Medical University, Nanning 530021, China
| | - H L Zhang
- Department of Pediatric Respiratory Disease, the Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University, Wenzhou 325027, China
| | - J L Pan
- First Department of Respiratory Medicine, Xi'an Children's Hospital, Xi'an 710003, China
| | - Y N Chen
- First Department of Respiratory Medicine, Xi'an Children's Hospital, Xi'an 710003, China
| | - X Y Dong
- Department of Respiratory, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai 200062, China
| | - Y F Zhang
- Department of Pediatrics, Second Affiliated Hospital of Jilin University, Changchun 130000, China
| | - Y S Wang
- Department of Pulmonology, Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou 310052, China
| | - D H Yang
- Department of Pulmonology, Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou 310052, China
| | - Q Lu
- Department of Respiratory, Shanghai Children's Hospital, Shanghai Jiao Tong University, Shanghai 200062, China
| | - Z M Chen
- Department of Pulmonology, Children's Hospital, Zhejiang University School of Medicine, National Clinical Research Center for Child Health, Hangzhou 310052, China
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Tian YL, Ji JJ, Chen LN, Cui XL, Liu ST, Mao L, Qiu YD, Li BB. Risk factors for long-term prognosis of hepatocellular carcinoma patients after anatomic hepatectomy. World J Clin Cases 2020; 8:713-722. [PMID: 32149055 PMCID: PMC7052543 DOI: 10.12998/wjcc.v8.i4.713] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 01/03/2020] [Accepted: 02/11/2020] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND The risk factors for patients with major postoperative complications immediately after liver resection have been identified; however, the intermediate and long-term prognoses for these patients have yet to be determined.
AIM To evaluate the factors responsible for the long-term recurrence-free survival rate in patients with hepatocellular carcinoma (HCC) following anatomic hepatectomy.
METHODS We performed a retrospective analysis of 74 patients with HCC who underwent precise anatomic hepatectomy at our institution from January 2013 to December 2015. The observational endpoints for this study were the tumor recurrence or death of the HCC patients. The overall follow-up duration was three years. The recurrence-free survival curves were plotted by the Kaplan-Meier method and were analyzed by the log-rank test. The value of each variable for predicting prognosis was assessed via multivariate Cox proportional hazards regression analysis.
RESULTS The 1-year and 3-year recurrence-free survival rates of HCC patients were 68.92% and 55.41%, respectively, following anatomic liver resection. The results showed that the 3-year recurrence-free survival rate in HCC patients was closely related to preoperative cirrhosis, jaundice level, tumor stage, maximal tumor diameter, complications of diabetes mellitus, frequency of intraoperative hypotensive episodes, estimated blood loss (EBL), blood transfusion, fluid infusion, and postoperative infection (P < 0.1). Based on multivariate analysis, preoperative cirrhosis, tumor stage, intraoperative hypotension, and EBL were identified to be predictors of 3-year recurrence-free survival in HCC patients undergoing anatomic hepatectomy (P < 0.05).
CONCLUSION Tumor stage and preoperative cirrhosis adversely affect the recurrence-free survival rate in HCC patients following anatomic hepatectomy. The long-term recurrence-free survival rate of patients with HCC is closely related to intraoperative hypotension and EBL.
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Affiliation(s)
- Ya-Li Tian
- Department of Anesthesiology, Drum Tower Hospital Affiliated with the Nanjing University Medical School, Nanjing 210008, Jiangsu Province, China
| | - Jing-Jing Ji
- Department of Anesthesiology, Drum Tower Hospital Affiliated with the Nanjing University Medical School, Nanjing 210008, Jiangsu Province, China
| | - Lu-Ning Chen
- Department of Anesthesiology, Drum Tower Hospital Affiliated with the Nanjing University Medical School, Nanjing 210008, Jiangsu Province, China
| | - Xin-Long Cui
- Department of Anesthesiology, Drum Tower Hospital Affiliated with the Nanjing University Medical School, Nanjing 210008, Jiangsu Province, China
| | - Shi-Teng Liu
- Department of Surgery, Division of Hepatobiliary and Pancreatic Surgery, Drum Tower Hospital Affiliated with the Nanjing University Medical School, Nanjing 210008, Jiangsu Province, China
| | - Liang Mao
- Department of Surgery, Division of Hepatobiliary and Pancreatic Surgery, Drum Tower Hospital Affiliated with the Nanjing University Medical School, Nanjing 210008, Jiangsu Province, China
| | - Yu-Dong Qiu
- Department of Surgery, Division of Hepatobiliary and Pancreatic Surgery, Drum Tower Hospital Affiliated with the Nanjing University Medical School, Nanjing 210008, Jiangsu Province, China
| | - Bing-Bing Li
- Department of Anesthesiology, Drum Tower Hospital Affiliated with the Nanjing University Medical School, Nanjing 210008, Jiangsu Province, China
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Chen LN, Hou KP, Liu YS, Qi ZY, Zheng Q, Lu YH, Chen JY, Chen JL, Pao CW, Wang SB, Li YB, Xie SH, Liu FD, Prendergast D, Klebanoff LE, Stavila V, Allendorf MD, Guo J, Zheng LS, Su J, Somorjai GA. Efficient Hydrogen Production from Methanol Using a Single-Site Pt 1/CeO 2 Catalyst. J Am Chem Soc 2019; 141:17995-17999. [PMID: 31647653 DOI: 10.1021/jacs.9b09431] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Hydrogen is regarded as an attractive alternative energy carrier due to its high gravimetric energy density and only water production upon combustion. However, due to its low volumetric energy density, there are still some challenges in practical hydrogen storage and transportation. In the past decade, using chemical bonds of liquid organic molecules as hydrogen carriers to generate hydrogen in situ provided a feasible method to potentially solve this problem. Research efforts on liquid organic hydrogen carriers (LOHCs) seek practical carrier systems and advanced catalytic materials that have the potential to reduce costs, increase reaction rate, and provide a more efficient catalytic hydrogen generation/storage process. In this work, we used methanol as a hydrogen carrier to release hydrogen in situ with the single-site Pt1/CeO2 catalyst. Moreover, in this reaction, compared with traditional nanoparticle catalysts, the single site catalyst displays excellent hydrogen generation efficiency, 40 times higher than 2.5 nm Pt/CeO2 sample, and 800 times higher compared to 7.0 nm Pt/CeO2 sample. This in-depth study highlights the benefits of single-site catalysts and paves the way for further rational design of highly efficient catalysts for sustainable energy storage applications.
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Affiliation(s)
- Lu-Ning Chen
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and Department of Chemistry, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , China
| | - Kai-Peng Hou
- Department of Chemistry , University of California-Berkeley , Berkeley , California 94720 , United States
| | | | | | | | | | - Jia-Yu Chen
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and Department of Chemistry, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , China
| | - Jeng-Lung Chen
- National Synchrotron Radiation Research Center , Science-Based Industrial Park, Hsinchu 30076 , Taiwan
| | - Chih-Wen Pao
- National Synchrotron Radiation Research Center , Science-Based Industrial Park, Hsinchu 30076 , Taiwan
| | | | - Yao-Bin Li
- Institute of Urban Environment, Chinese Academy of Sciences , Xiamen 361021 , China
| | - Shao-Hua Xie
- Department of Civil, Environmental, and Construction Engineering, Catalysis Cluster for Renewable Energy and Chemical Transformations (REACT), Nano-Science Technology Center (NSTC) , University of Central Florida , Orlando , Florida 32916 , United States
| | - Fu-Dong Liu
- Department of Civil, Environmental, and Construction Engineering, Catalysis Cluster for Renewable Energy and Chemical Transformations (REACT), Nano-Science Technology Center (NSTC) , University of Central Florida , Orlando , Florida 32916 , United States
| | | | | | - Vitalie Stavila
- Sandia National Laboratories , Livermore , California 94551 , United States
| | - Mark D Allendorf
- Sandia National Laboratories , Livermore , California 94551 , United States
| | | | - Lan-Sun Zheng
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and Department of Chemistry, College of Chemistry and Chemical Engineering , Xiamen University , Xiamen 361005 , China
| | | | - Gabor A Somorjai
- Department of Chemistry , University of California-Berkeley , Berkeley , California 94720 , United States
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Wang YX, Mao BH, Li J, Li YM, Dai ZR, Zhang CH, Chen LN, Liu Q. [Effect of occupational stress on recurrent spontaneous abortion in women of childbearing age]. Zhonghua Lao Dong Wei Sheng Zhi Ye Bing Za Zhi 2019; 36:840-843. [PMID: 30646649 DOI: 10.3760/cma.j.issn.1001-9391.2018.11.011] [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 influence of occupational stress on recurrent spontaneous abortion (RSA) in women of childbearing age. Methods: From January to December, 2017, 75 working women of childbearing age (25-35 years) who were admitted to a provisional hospital in Lanzhou, China and diagnosed with RSA were assigned into patient group. At a 1∶4 ratio, 300 age-matched working women who had normal first pregnancy were randomly selected as controls. A case-control study was conducted by a self-made questionnaire and the effort-reward imbalance scale. The impact of occupational stress on RSA in women of childbearing age was analyzed by evaluation of occupational harmful factors, regularity, effort-reward ratio, and sleep quality. Results: There were significant differences in the distribution of sleep, daily exercise, night shift, extrinsic-effort/low-reward score, and effort/low-reward score between the patient group and the control group (χ(2)=7.867, P<0.05; χ(2)=7.377, P<0.05; χ(2)=3.714, P<0.05; χ(2)=6.651, P<0.05; χ(2)=8.556, P<0.05) . With controlled factors such as general conditions and living habits, logistic regression analysis showed that poor sleep quality and high-effort/low-reward were risk factors for RSA (odds ratio[OR]=1.462, 95% confidence interval[CI]: 1.032~2.073; OR=3.253, 95%CI: 1.169~9.053) . A regular work was a protective factor against RSA (OR=0.644, 95%CI: 0.438-0.946) . Conclusion: In occupational stress, irregular working hours, lack of sleep, and high-effort/low-reward are risk factors for RSA. Working women of childbearing age should ensure adequate sleep, pay attention to effort-reward balance, and make a regular work schedule.
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Affiliation(s)
- Y X Wang
- Institute of Research Center, Gansu Provincial Maternity and Child-care Hospital, Lanzhou 730030, China
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Yang KN, Han W, Qin YJ, Chen LN. Effects of different levels of soluble PD-L1 protein on the growth of Lewis lung cancer transplanted tumor. J BIOL REG HOMEOS AG 2019; 33:537-542. [PMID: 30972999] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
To investigate the effects of different doses of soluble PD-L1 (soluble form of Programmed death ligand 1, sPD-L1) protein on Lewis lung cancer cells, flow cytometry was used to detect the expression of PD-L1 (Programmed death ligand 1) on the surface of Lewis lung cancer cell lines and the expression of PD-1 on the surface of T lymphocytes in peripheral blood and spleen cells of C57BL/6 mice. A Lewis lung cancer animal model of C57BL/6 mice was established by transplanting Lewis lung cancer cells subcutaneously. The sPD-L1 protein was injected into the abdominal cavity of the mouse (sPD-L1 Ig) (working dose: 2.5, 5, 10 μg per mouse), while the sPD-L1 control protein was injected as a control. The growth of Lewis lung cancer xenografts was observed. On the 18th day after tumor cell inoculation, T lymphocyte subsets in mouse spleen were determined by flow cytometry. The PD-1 molecules on the surface of Lewis lung cancer cell line, C57BL/6 mouse spleen T lymphocytes and peripheral blood T lymphocytes were positively expressed. Compared with the control group, the volume of the transplanted tumor of Lewis lung cancer in C57BL/6 mice was larger with 10 μg sPD-L1 I g injection (P less than 0.05), and no significant difference was observed in tumor volume with 2.5 μg and 5 μg injection (P > 0.05). A certain level of soluble PD-L1 (10 μg/ mouse) could promote the growth of transplanted tumors of Lewis lung cancer in C57BL/6 mice.
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Affiliation(s)
- K N Yang
- Respiratory and Critical Care Medicine, Weifang Respiratory Disease Hospital (Weifang No.2 people's Hospital), Weifang, Shandong, China
| | - W Han
- Respiratory and Critical Care Medicine, Weifang Respiratory Disease Hospital (Weifang No.2 people's Hospital), Weifang, Shandong, China
| | - Y J Qin
- Respiratory and Critical Care Medicine, Weifang Respiratory Disease Hospital (Weifang No.2 people's Hospital), Weifang, Shandong, China
| | - L N Chen
- Respiratory and Critical Care Medicine, Weifang Respiratory Disease Hospital (Weifang No.2 people's Hospital), Weifang, Shandong, China
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Chen LN, Li HQ, Yan MW, Yuan CF, Zhan WW, Jiang YQ, Xie ZX, Kuang Q, Zheng LS. Ternary Alloys Encapsulated within Different MOFs via a Self-Sacrificing Template Process: A Potential Platform for the Investigation of Size-Selective Catalytic Performances. Small 2017; 13:1700683. [PMID: 28675780 DOI: 10.1002/smll.201700683] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 05/19/2017] [Indexed: 06/07/2023]
Abstract
Functional nanoparticles encapsulated within metal-organic frameworks (MOFs) as an emerging class of composite materials attract increasing attention owing to their enhanced or even novel properties caused by the synergistic effect between the two functional materials. However, there is still no ideal composite structure as platform to systematically analyze and evaluate the relation between the enhanced catalytic performance of composites and the structure of MOF shells. In this work, taking RhCoNi ternary alloy nanoflowers, for example, first the RhCoNi@MOF composite catalysts sheathed with different structured MOFs via a facile self-sacrificing template process are successfully fabricated. The structure type of MOF shells is easily adjustable by using different organic molecules as etchant and coordination reagent (e.g., 2,5-dihydroxyterephthalic acid or 2-methylimidazole), which can dissolve out the Co or Ni element in the alloy template in a targeted manner, thereby producing ZIF-67(Co) or MOF-74(Ni) shells accordingly. With the difference between the two MOF shells in the aperture sizes, the as-prepared two RhCoNi@MOF composites preform distinct size selectivity during the alkene hydrogenation. This work would help us to get more comprehensive understanding of the intrinsic role of MOFs behind the enhanced catalytic performance of nanoparticle@MOF composites.
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Affiliation(s)
- Lu-Ning Chen
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Hui-Qi Li
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Meng-Wen Yan
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Chao-Fan Yuan
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Wen-Wen Zhan
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Ya-Qi Jiang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Zhao-Xiong Xie
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
- Pen-Tung Sah Institute of Micro-Nano Science and Technology, Xiamen University, Xiamen, 361005, China
| | - Qin Kuang
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
| | - Lan-Sun Zheng
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Collaborative Innovation Center of Chemistry for Energy Materials, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China
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11
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Li ZB, Li QH, Ning YF, Shangguan JB, Dai G, Chen LN, Cao YY, Chen XJ. Development and characterization of microsatellite loci in Megalonibea fusca. Genet Mol Res 2015; 14:4633-6. [PMID: 25966237 DOI: 10.4238/2015.may.4.22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Megalonibea fusca is a commercially important large edible fish. In this study, the first set of 10 polymorphic microsatellite loci for M. fusca was developed and characterized. The number of alleles per locus ranged from two to five, with the observed and expected heterozygosities ranging from 0.0667 to 0.7667, and from 0.0644 to 0.5828, respectively. Most of the loci were in Hardy-Weinberg equilibrium (P > 0.05), except for two loci (Mf25 and Mf30) after a Bonferroni's correction (P < 0.005). These informative microsatellite markers will be useful in further studies of the population and conservation genetics of this species.
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Affiliation(s)
- Z B Li
- Fisheries College, Jimei University, Xiamen, China
| | - Q H Li
- Fisheries College, Jimei University, Xiamen, China
| | - Y F Ning
- Fisheries College, Jimei University, Xiamen, China
| | | | - G Dai
- Fisheries College, Jimei University, Xiamen, China
| | - L N Chen
- Fisheries College, Jimei University, Xiamen, China
| | - Y Y Cao
- Fisheries College, Jimei University, Xiamen, China
| | - X J Chen
- Fisheries College, Jimei University, Xiamen, China
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12
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Li ZB, Tian XJ, Shangguan JB, Cao YY, Zhang GL, Chen LN. Development of novel and polymorphic microsatellite DNA loci from Haliotis ovina. Genet Mol Res 2015; 14:525-8. [PMID: 25729987 DOI: 10.4238/2015.january.26.6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Twelve microsatellite loci were developed from Haliotis ovina by the magnetic bead hybridization method. Genetic variability was assessed using 30 individuals from 3 wild populations. The number of alleles per locus ranged from 2 to 5, and the polymorphism information content ranged from 0.1228 to 0.6542. Observed and expected heterozygosities ranged from 0.0000 to 0.7778 and 0.1288 to 0.6310, respectively. These loci should provide useful information for genetic studies such as genetic diversity, pedigree analysis, construction of genetic linkage maps, and marker-assisted selection breeding in H. ovina.
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Affiliation(s)
- Z B Li
- Fisheries College, Jimei University, Xiamen, China
| | - X J Tian
- Fisheries College, Jimei University, Xiamen, China
| | | | - Y Y Cao
- Fisheries College, Jimei University, Xiamen, China
| | - G L Zhang
- Fisheries College, Jimei University, Xiamen, China
| | - L N Chen
- Fisheries College, Jimei University, Xiamen, China
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13
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Chen LN, Yang GB, Zhu NB. A Cauchy distribution-based ternary hypothesis testing for bipolar additive watermark detection in H.264/AVC video. The Imaging Science Journal 2013. [DOI: 10.1179/1743131x11y.0000000058] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
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Li QH, Li ZB, Dai G, Chen XJ, Chen LN, Cao YY, Shangguan JB, Ning YF. Characterization of new microsatellite markers of Siganus fuscescens (Siganidae). Genet Mol Res 2013; 12:2751-4. [PMID: 23979899 DOI: 10.4238/2013.july.30.12] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
Siganus fuscescens, which is a small commercially important marine fish, is wildly distributed in shallow waters throughout the tropical and subtropical Indo-Pacific and Eastern Mediterranean regions. It is part of a group known as rabbitfish. Fifteen new polymorphic microsatellite markers for S. fuscescens were identified, and 32 wild individuals were used to evaluate the degree of polymorphism of these markers. The number of alleles per locus ranged from 2 to 12, and the polymorphism information content ranged from 0.210 to 0.849. The observed and expected heterozygosities were 0.142-0.808 and 0.225-0.853, respectively. Although significant deviations from Hardy-Weinberg equilibrium were detected at 2 loci (Sf1-37-2 and Sf1-47), no significant deviations were detected at the other 13 loci. These microsatellite markers will provide a useful tool for studies on genetic diversity and differentiation of S. fuscescens.
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Affiliation(s)
- Q H Li
- Fisheries College, Jimei University, Xiamen, China
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15
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Chen LN, Wang Y, Ma DL, Chen YY. Short interfering RNA against the PDCD5 attenuates cell apoptosis and caspase-3 activity induced by Bax overexpression. Apoptosis 2007; 11:101-11. [PMID: 16374546 DOI: 10.1007/s10495-005-3134-y] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The programmed cell death 5 (PDCD5) protein plays an important apoptosis-accelerating role in cells undergoing apoptosis. Decreased expression of PDCD5 has been detected in various human carcinomas. Here we describe that one potent short interfering RNA (siRNA) against the PDCD5 (siPDCD5) specifically inhibits the expression of PDCD5 at both the mRNA and protein level. Cells with decreased PDCD5 expression displayed reduced sensitivity to an apoptotic stimulus induced by Bax overexpression in HeLa, HEK293 and 293T cell lines. Furthermore, we also show that siPDCD5 inhibited both caspase-3 activity and procaspase-3 cleavage. Suppressed expression of PDCD5 attenuates the release of cytochrome c from mitochondria to cytosol induced by Bax overexpression. This phenomenon is accompanied by the reduced translocation of Bax from the cytosol to mitochondria. MTT assay shows that targeted suppression of PDCD5 expression markedly promoted cell proliferation in Hela and HEK293 cell lines. Our data suggests that PDCD5 may exert its effects through pathway of mitochondria by modulating Bax translocation, cytochrome c release and caspase 3 activation directly or indirectly, and that decreased PDCD5 expression may be one of the mechanisms by which tumor cells achieve resistance to apoptotic stimulus induced by anticancer drugs.
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Affiliation(s)
- L N Chen
- Laboratory of Medical Immunology, School of Basic Medical Science, Peking University Health Science Center, 38 Xueyuan Road, Beijing, 100083, People's Republic of China
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16
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Abstract
This study investigated whether each part of the heart is evenly innervated by the left or right vagus and observed the mechanism of compensatory recovery after unilateral cervical vagotomy. HR, BP, LVSP and +/-dp/dt max all decreased one week after left vagotomy, whereas only BP and -dp/dt max decreased one week after right vagotomy. Western blot analyses revealed that the expression of M(2) receptors in the left atrium and left ventricle was upregulated after subacute (1 week) left/right vagotomy. However, significantly more cholinesterase-positive nerves in LV and RV were seen one week after unilateral vagotomy compared to the sham-operated group. In addition, baroreflex sensitivity was increased after subacute right vagotomy. The decreasing effects of ACh (0.5 microg/kg) on LVSP and +/-dp/dt max (but not on HR and BP) were facilitated by subacute unilateral vagotomy. Our present experiments indicate that 1) the working myocardium is innervated bilaterally by the vagus, 2) ventricular contractility is influenced more by denervation of the left than the right vagus and 3) up-regulation of M(2) muscarinic receptors in the left heart, increase of cholinergic nerves, and high baroreflex sensitivity could be involved in the mechanism of compensatory hemodynamic recovery via contralateral vagus overactivity, thereby amplifying contralateral vagal activity and decreasing cardiac contractility.
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Affiliation(s)
- L N Chen
- Department of Pharmacology, College of Medicine, Xi'an Jiaotong University, Xi'an, China
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17
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Zang WJ, Chen LN, Yu XJ, Fang P, Lu J, Sun Q. Comparison of effects of acetylcholine on electromechanical characteristics in guinea-pig atrium and ventricle. Exp Physiol 2004; 90:123-30. [PMID: 15466461 DOI: 10.1113/expphysiol.2004.027888] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The direct negative effects of acetylcholine (ACh) on guinea-pig atria and ventricles were investigated using standard microelectrodes, a force transducer and a video edge-detection system. It was found that: (1) ACh (at 0.001-100 microm) decreased the force of contraction and shortened the action potential duration (APD) in both atria and ventricles in a concentration-dependent manner, and that the atria were more sensitive to ACh than the ventricles; and (2) the direct negative inotropic effect of ACh (1 microm) on an isolated cardiac cell was similar to that on the isolated myocardium. But this effect was not present in all isolated ventricular cells, while all the atrial cells responded to ACh. In conclusion, ACh had direct inhibitory effects on both atrial and ventricular tissue and myocytes, although the effects were greater in atria than in ventricles; and the negative inotropic effect of ACh was closely related to the shortening of the APD.
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Affiliation(s)
- W J Zang
- School of Medicine, Department of Pharmacology, Division of Cardiovascular Physiology and Pharmacology, Ki'an Jiaotong University, Xi'an, 710061, China.
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Abstract
The adherence and viability of central neural cells (substantia nigra) on a thin layer of SiO(2) on Si wafers with different surface roughness were investigated. Variable roughness of the Si wafer surface was achieved by etching. The nano-scale surface topography was evaluated by atomic force microscopy. The adherence and subsequent viability of the cells on the wafer were examined by scanning electron microscopy (SEM) and fluorescence immunostaining of tyrosine hydroxylase (TH). It is found that the surface roughness significantly affected cell adhesion and viability. Cells survived for over 5 days with normal morphology and expressed neuronal TH when grown on surfaces with an average roughness (Ra) ranging from 20 to 50 nm. However, cell adherence was adversely affected when surfaces with Ra less than 10 nm and rough surfaces with Ra above 70 nm were used as the substrate. Such a simple preparation procedure may provide a suitable interface surface for silicon-based devices and neurones or other living tissues.
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Affiliation(s)
- Y W Fan
- Department of Materials Science and Engineering, Tsinghua University, 100084, Beijing, People's Republic of China
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Delgado G, Viluce C, Fletcher E, de Espinosa H, Del Río B, Chen LN. [Bilateral Wilms' tumor. Current treatment]. Rev Med Panama 1996; 21:93-101. [PMID: 9280927] [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: 02/05/2023]
Abstract
Partial nephrectomy combined with chemotherapy has been the most effective treatment in bilateral Wilms tumors. We present two cases. The bilateral synchronous tumor are present in 4.2% and the metachronous tumor in 1.6%, in the world statistics. The synchronous bilateral Wilms tumor, Stage V, have an excellent prognosis: over 87% survival, compared to 40% of the metachronous bilateral Wilms tumors.
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Chiou JY, Chang LS, Chen LN, Chang CC. Purification and characterization of a novel phospholipase A2 from king cobra (Ophiophagus hannah) venom. J Protein Chem 1995; 14:451-6. [PMID: 8593185 DOI: 10.1007/bf01888139] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
A novel phospholipase A2, designated as Oh-DE-2, was isolated from the venom of Ophiophagus hannah (king cobra) by successive chromatography on SP-Sephadex C-25, DE-52, and Q-Sepharose columns. Oh-DE-2 with pI 5.1 showed an apparent molecular weight of 14 kD as revealed by SDS-PAGE and gel filtration. The amino acid sequence was homologous with those of PLA2S from Elapidae venoms. Oh-DE-2 was effectively inactivated by p-bromophenacyl bromide, indicating that the conserved His-48 is essential for its enzymatic activity. However, modification of the conserved Trp-19 did not cause a precipitous drop in the enzymatic activity of Oh-DE-2 as observed with PLA2S from Naja naja atra and Bungarus multicinctus venoms. A quenching study showed that the microenvironment of Trp in Oh-DE-2 was inaccessible to acrylamide, iodide, or cesium, a finding which was different from those observed with PLA2S from N. naja atra and B. multicinctus venoms. These results might suggest that, unlike other PLA2 enzymes, Trp-19 in Oh-DE-2 is not directly involved in its enzymatic mechanisms.
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Affiliation(s)
- J Y Chiou
- Department of Biochemistry, Kaohsiung Medical College, Taiwan, ROC
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Chen LN, Liu CS, Chang CC. Isolation and characterization of a toxic phospholipase A2 from the venom of the Taiwan habu (Trimeresurus mucrosquamatus). Biotechnol Appl Biochem 1994; 19:61-73. [PMID: 8136082] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
A toxic phospholipase A2 (PLA2) was isolated from Taiwan-habu-snake (Trimeresurus mucrosquamatus) venom by sequential chromatographies on CM-52, Sephadex G-75 and S-Sepharose columns. This basic PLA2 has a single polypeptide with an estimated M(r) of 15,000. The PLA2 activity was Ca(2+)-dependent and inactivated by p-bromophenacyl bromide and its specific antibody. The toxic PLA2-induced myotoxic and direct haemolytic effects as well as respiratory distress in mice with an intraperitoneal LD50 of 1.17 micrograms/g body weight. The histological examination showed it caused haemorrhage and congestion in the viscera of mice. It was also cytotoxic to myeloma cells (NS-1), baby-hamster-kidney (BHK) cells and human umbilical endothelial cells. By neutralization experiments with a specific antibody against toxic PLA2, it was found that the enzymic activity of toxic PLA2 is essential for its myotoxicity, but it is not the only factor responsible for the lethal toxicity.
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Affiliation(s)
- L N Chen
- Department of Biochemistry, Kaohsiung Medical College, Taiwan, Republic of China
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Lu CY, Yin DM, Cao D, Chen LN. [Immune status of oral lichen planus and squamous cell cancer patients-T subgroup cells evaluation in PBL]. Shanghai Kou Qiang Yi Xue 1992; 1:70-2. [PMID: 15159893] [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: 04/29/2023]
Abstract
The levels of T-subgroup cells for 30 oral lichen planus(LP) and 25 cancers are reported.15 health are constracted.The results are as follows:Health OKT value T(3) 62.8+/-1.81,T(4) 44.4+/-7.34,T(8) 25.5+/-0.71,T(4)/T(8) 1.79+/-0.13;OLP OKT value:T(3) 53.2+/-1.92,T(4) 40.2+/-1.9, T(8)38.61+/-2.2, T(4)/T(8) 1.10+/-0.07,Cancer value 52.9+/-1.9,40.2+/-2.3,36.4+/-2.05,1.17+/-0.09. Both group of patients were compared with health.The level of OKT(3) OKT(4)/OKT(8) was decreased significantly(0.001),but OKT(8) qA increased significantly(0.001).This shows that T cell immune function is decreased in the oral LP and cancer patients.
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Affiliation(s)
- C Y Lu
- Department of Oral Immunology,School of Stomatogy, Shanghai Second Medical University. Shanghai 200023,China
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23
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Chen LN, Parham ES. College students' use of high-intensity sweeteners is not consistently associated with sugar consumption. J Am Diet Assoc 1991; 91:686-90. [PMID: 2040783] [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: 12/29/2022]
Abstract
This study, which replicated the 1980 investigation of Parham and Parham, sought to determine whether the use of high-intensity sweeteners (HISs) effectively reduced sugar intake among college students. At the time of the earlier study, saccharin was the only available HIS; the current investigation considered the use of both saccharin and aspartame. Both studies used 24-hour recalls and food frequency data to assess the use of HISs and to determine intakes of sugars, energy, and selected dietary components. In this study 61% (82 of 135) of the women and 31% (18 of 58) of the men used HISs regularly. Among the women using HISs, sugar intake was significantly lower than among the women not using HISs, but both groups reported consuming a high proportion of energy from sugars. Among the men, use of HISs was associated with a significantly greater intake of sugars. The difference in the pattern of use between men and women is attributed to differences in concerns about weight and dieting. Compared with the earlier study, this investigation found a higher incidence of HIS use by both sexes and more use by men. Unlike the earlier findings, HIS use was not accompanied by a general restriction of food intake. There was no evidence that HISs were associated with a biologically significant reduction in sugar intake.
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Affiliation(s)
- L N Chen
- Department of Human and Family Resources at Northern Illinois University, DeKalb 60115
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24
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Zhong GQ, Chen LN, Wen XG. [Evaluation of scleral buckle in preventing retinal detachment after intraocular foreign body extraction]. Yan Ke Xue Bao 1985; 1:81-3. [PMID: 3880139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Chen LN, Chang CC. [Purification and characterization of hemorrhagic toxins from the venom of Trimeresurus gramineus]. Gaoxiong Yi Xue Ke Xue Za Zhi 1985; 1:113-22. [PMID: 2454320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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