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Wang Y, Liu W, Zhang J, Shan Q. Synthesis of Novel Ionic Porous Organic Polymers and Its Application in Hydroxyl Condensation Reaction. Catal Letters 2022. [DOI: 10.1007/s10562-022-04110-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Qiu Y, Lin D, Xu Y, Cheng Y, Wang F, Zhu Q, Zhu C, Wan C, Zhu Y, Tong J, Li R, Zhou Q, Chen M, Shan Q, Zhuo Z, Wang C, Zhao S, Song W, Zeng M. Invasive Klebsiella pneumoniae Infections in Community-Settings and Healthcare Settings. Infect Drug Resist 2021; 14:2647-2656. [PMID: 34285517 PMCID: PMC8285564 DOI: 10.2147/idr.s315871] [Citation(s) in RCA: 7] [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] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Accepted: 06/19/2021] [Indexed: 01/21/2023] Open
Abstract
Objective To assess clinical characteristics, outcomes and antimicrobial resistance of invasive Klebsiella pneumoniae (KP) infections in Chinese pediatric patients in hospital and community settings. Methods This retrospective study was conducted in the nine tertiary hospitals during 2016–2018. The 324 pediatric inpatients who had KP isolated from blood and cerebrospinal fluid and had complete medical records reviewed were included. We analyzed the risk factors, outcomes and antimicrobial resistance pattern of KP-infected patients based on comparison between healthcare-associated KP infections (HAI) and community-acquired infections. Results Of the 324 enrolled patients, 275 (84.9%) were clinically defined as HAI, including 175 (63.6%) neonates and 100 (36.4%) aged >28 days. The overall prevalence of CRKP was 38.2% (43.4% in HAI verse 8.7% in CAI, P <0.05). Prematurity (odds ratio (OR): 37.07, 95% CI: 8.29–165.84), hematologic malignancies (OR: 15.52, 95% CI: 1.89–127.14) and invasive mechanical ventilation (OR: 13.09, 95% CI: 1.66–103.56) were independent risk factors for HAI. Patients from rural area (OR: 1.94, 95% CI: 1.12–3.35), invasive mechanical ventilation (OR: 2.33, 95% CI: 1.25–4.33), antibiotic therapy prior to admission (OR: 2.33, 95% CI: 1.25–4.33) and prior hospital stay in the past 30 days (OR: 3.46, 95% CI: 1.87–6.41) were associated with healthcare-associated CRKP infections. Organ dysfunction was independently correlated with poor outcomes (OR: 2.92, 95% CI: 1.23–6.95). Conclusion Pediatric invasive KP infections and high prevalence of CRKP infections largely occurred in healthcare settings in China. The adequate and intensified infection control measures should be focused on high-risk hematologic patients, neonatal patients and intubated patients.
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Affiliation(s)
- Yue Qiu
- Department of Infectious Diseases, Children's Hospital of Fudan University, ShangHai, People's Republic of China
| | - Daojiong Lin
- Department of Infectious Diseases, Hainan Women and Children's Medical Center, Haikou, People's Republic of China
| | - Yi Xu
- Department of Infections Disease, Guangzhou Women and Children's Medical Center, Guangzhou, People's Republic of China
| | - Yibing Cheng
- Department of Emergency, Children's Hospital Affiliated to Zhengzhou University (Henan Children's Hospital), Zhengzhou, People's Republic of China
| | - Fang Wang
- Department of Infections Disease, Children's Hospital Affiliated to Zhengzhou University (Henan Children's Hospital), Zhengzhou, People's Republic of China
| | - Qingxiong Zhu
- Department of Infection Diseases, Children's hospital of Jiangxi Province, Nanchang, People's Republic of China
| | - Chunhui Zhu
- Department of Infection Diseases, Children's hospital of Jiangxi Province, Nanchang, People's Republic of China
| | - Chaomin Wan
- Department of Pediatrics, West China Second Hospital, Sichuan University, Chengdu, People's Republic of China
| | - Yu Zhu
- Department of Pediatrics, West China Second Hospital, Sichuan University, Chengdu, People's Republic of China
| | - Jianning Tong
- Department of Pediatric, Gastroenterology and Infectious Diseases, Qingdao Women and Children's Hospital, Qingdao, People's Republic of China
| | - Rui Li
- Department of Pediatric, Gastroenterology and Infectious Diseases, Qingdao Women and Children's Hospital, Qingdao, People's Republic of China
| | - Qionghua Zhou
- Department of Infectious Diseases, Hainan Women and Children's Medical Center, Haikou, People's Republic of China
| | - Minxia Chen
- Department of Infections Disease, Guangzhou Women and Children's Medical Center, Guangzhou, People's Republic of China
| | - Qingwen Shan
- Department of Pediatrics, The First Affiliated Hospital of Guangxi Medical University, Nanning, People's Republic of China
| | - Zhiqiang Zhuo
- Department of Infectious Diseases, Xiamen Children's Hospital, Xiamen, People's Republic of China
| | - Caihong Wang
- Department of Infectious Diseases, Xiamen Children's Hospital, Xiamen, People's Republic of China
| | - Shiyong Zhao
- Department of Infectious Diseases, Hangzhou Children's Hospital, Hangzhou, People's Republic of China
| | - Wen Song
- Department of Infectious Diseases, Hangzhou Children's Hospital, Hangzhou, People's Republic of China
| | - Mei Zeng
- Department of Infectious Diseases, Children's Hospital of Fudan University, ShangHai, People's Republic of China
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Zhan Q, Lv Z, Tang Q, Huang L, Chen X, Yang M, Lan L, Shan Q. Glycogen storage disease type VI with a novel PYGL mutation: Two case reports and literature review. Medicine (Baltimore) 2021; 100:e25520. [PMID: 33879691 PMCID: PMC8078372 DOI: 10.1097/md.0000000000025520] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 03/25/2021] [Indexed: 11/26/2022] Open
Abstract
RATIONALE Glycogen storage disease (GSD) type VI is a rare disease caused by the inherited deficiency of liver phosphorylase. PATIENT CONCERNS The proband, a 61-month-old Chinese boy, manifested intermittent hematochezia, growth retardation, hepatomegaly, damage of liver function, mild hypoglycemia, and hyperlactatemia. The other patient was a 107-month-old Chinese girl with growth retardation, hepatomegaly, mild hypoglycemia, and hyperlactatemia. In order to further confirm the diagnosis, we conducted a liver biopsy and detected blood samples for their gene using IDT exon chip capture and high-throughput sequencing. DIAGNOSES According to the clinical symptoms, physical examination, laboratory examinations, liver biopsy, and the genetic test finding, the 2 patients were diagnosed GSD VI. INTERVENTIONS They were treated mainly with uncooked cornstarch. OUTCOMES There were 2 mutations of PYGL gene in this pedigree. c.2467C>T (p. Q823X) and c.2178-2A>C occurred both in the proband and his second sister. LESSONS As a novel mutation, c.2178-2A>C enriches the mutation spectrum of PYGL gene. The different degrees of elevated lactate is an unusual phenotype in GSD VI patients. It is not clear if this is caused by the new mutation of c. 2178-2A > C. Long-term complications remains to be observed.
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Affiliation(s)
| | - Zili Lv
- Department of Pathology, the First Affiliated Hospital of Guangxi Medical University, Nanning, China
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Peng X, Zhu Q, Liu J, Zeng M, Qiu Y, Zhu C, Cheng Y, Zhou Y, Xu Y, Chen M, Wen Z, Chen Y, Li R, Tong J, Shan Q, Lin D, Wu S, Zhuo Z, Wang C, Zhao S, Qi Z, Sun X, Maihebuba B, Jia C, Gao H, Li S, Zhu Y, Wan C. Prevalence and antimicrobial resistance patterns of bacteria isolated from cerebrospinal fluid among children with bacterial meningitis in China from 2016 to 2018: a multicenter retrospective study. Antimicrob Resist Infect Control 2021; 10:24. [PMID: 33516275 PMCID: PMC7847565 DOI: 10.1186/s13756-021-00895-x] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 01/21/2021] [Indexed: 11/23/2022] Open
Abstract
Background Pediatric bacterial meningitis (PBM) remains a devastating disease that causes substantial neurological morbidity and mortality worldwide. However, there are few large-scale studies on the pathogens causing PBM and their antimicrobial resistance (AMR) patterns in China. The present multicenter survey summarized the features of the etiological agents of PBM and characterized their AMR patterns. Methods Patients diagnosed with PBM were enrolled retrospectively at 13 children’s hospitals in China from 2016 to 2018 and were screened based on a review of cerebrospinal fluid (CSF) microbiology results. Demographic characteristics, the causative organisms and their AMR patterns were systematically analyzed. Results Overall, 1193 CSF bacterial isolates from 1142 patients with PBM were obtained. The three leading pathogens causing PBM were Staphylococcus epidermidis (16.5%), Escherichia coli (12.4%) and Streptococcus pneumoniae (10.6%). In infants under 3 months of age, the top 3 pathogens were E. coli (116/523; 22.2%), Enterococcus faecium (75/523; 14.3%), and S. epidermidis (57/523; 10.9%). However, in children more than 3 months of age, the top 3 pathogens were S. epidermidis (140/670; 20.9%), S. pneumoniae (117/670; 17.5%), and Staphylococcus hominis (57/670; 8.5%). More than 93.0% of E. coli isolates were sensitive to cefoxitin, piperacillin/tazobactam, cefoperazone/sulbactam, amikacin and carbapenems, and the resistance rates to ceftriaxone, cefotaxime and ceftazidime were 49.4%, 49.2% and 26.4%, respectively. From 2016 to 2018, the proportion of methicillin-resistant coagulase-negative Staphylococcus isolates (MRCoNS) declined from 80.5 to 72.3%, and the frequency of penicillin-resistant S. pneumoniae isolates increased from 75.0 to 87.5%. The proportion of extended-spectrum β-lactamase (ESBL)-producing E. coli fluctuated between 44.4 and 49.2%, and the detection rate of ESBL production in Klebsiella pneumoniae ranged from 55.6 to 88.9%. The resistance of E. coli strains to carbapenems was 5.0%, but the overall prevalence of carbapenem-resistant K. pneumoniae (CRKP) was high (54.5%). Conclusions S. epidermidis, E. coli and S. pneumoniae were the predominant pathogens causing PBM in Chinese patients. The distribution of PBM causative organisms varied by age. The resistance of CoNS to methicillin and the high incidence of ESBL production among E. coli and K. pneumoniae isolates were concerning. CRKP poses a critical challenge for the treatment of PBM.
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Affiliation(s)
- Xiaoshan Peng
- Department of Pediatrics, West China Second Hospital, Sichuan University and Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, No 20, 3rd Section of Renmin South Road, Chengdu, 610041, People's Republic of China
| | - Qingxiong Zhu
- Department of Infectious Diseases, Children's Hospital of Jiangxi Province, Nanchang, People's Republic of China
| | - Jing Liu
- Department of Infectious Diseases, Hunan Children's Hospital, Changsha, People's Republic of China
| | - Mei Zeng
- Department of Infectious Diseases, Children's Hospital of Fudan University, Shanghai, People's Republic of China
| | - Yue Qiu
- Department of Infectious Diseases, Children's Hospital of Fudan University, Shanghai, People's Republic of China
| | - Chunhui Zhu
- Department of Infectious Diseases, Children's Hospital of Jiangxi Province, Nanchang, People's Republic of China
| | - Yibing Cheng
- Department of Emergency, Children's Hospital Affiliated to Zhengzhou University (Henan Children's Hospital), Zhengzhou, People's Republic of China
| | - Yibo Zhou
- Department of General Pediatrics, Children's Hospital Affiliated to Zhengzhou University (Henan Children's Hospital), Zhengzhou, People's Republic of China
| | - Yi Xu
- Department of Infectious Diseases, Guangzhou Women and Children's Medical Center, Guangzhou, People's Republic of China
| | - Minxia Chen
- Department of Infectious Diseases, Guangzhou Women and Children's Medical Center, Guangzhou, People's Republic of China
| | - Zhengwang Wen
- Department of Pediatrics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, People's Republic of China
| | - Yiping Chen
- Department of Pediatrics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, People's Republic of China
| | - Rui Li
- Department of Pediatrics, Gastroenterology and Infectious Diseases, Qingdao Women and Children's Hospital, Qingdao, People's Republic of China
| | - Jianning Tong
- Department of Pediatrics, Gastroenterology and Infectious Diseases, Qingdao Women and Children's Hospital, Qingdao, People's Republic of China
| | - Qingwen Shan
- Department of Pediatrics, The First Affiliated Hospital of Guangxi Medical University, Nanning, People's Republic of China
| | - Daojiong Lin
- Department of Infectious Diseases, Hainan Women and Children's Medical Center, Haikou, People's Republic of China
| | - Shouye Wu
- Department of Infectious Diseases, Hainan Women and Children's Medical Center, Haikou, People's Republic of China
| | - Zhiqiang Zhuo
- Department of Infectious Diseases, Xiamen Children's Hospital, Xiamen, People's Republic of China
| | - Caihong Wang
- Department of Infectious Diseases, Xiamen Children's Hospital, Xiamen, People's Republic of China
| | - Shiyong Zhao
- Department of Infectious Diseases, Hangzhou Children's Hospital, Hangzhou, People's Republic of China
| | - Zhenghong Qi
- Department of Infectious Diseases, Hangzhou Children's Hospital, Hangzhou, People's Republic of China
| | - Xiaofeng Sun
- Department of Infectious Diseases, The First Affiliated Hospital of Xinjiang Medical University, Ürümqi, People's Republic of China
| | - Bieerding Maihebuba
- Department of Infectious Diseases, The First Affiliated Hospital of Xinjiang Medical University, Ürümqi, People's Republic of China
| | - Chunmei Jia
- Department of Pediatrics, The Fourth Hospital of Baotou, Baotou, People's Republic of China
| | - Huiling Gao
- Department of Pharmacy, The Fourth Hospital of Baotou, Baotou, People's Republic of China
| | - Shuangjie Li
- Department of Hepatology, Hunan Children's Hospital, No 86 Ziyuan Road, Changsha, 410000, People's Republic of China.
| | - Yu Zhu
- Department of Pediatrics, West China Second Hospital, Sichuan University and Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, No 20, 3rd Section of Renmin South Road, Chengdu, 610041, People's Republic of China.
| | - Chaomin Wan
- Department of Pediatrics, West China Second Hospital, Sichuan University and Key Laboratory of Birth Defects and Related Diseases of Women and Children, Ministry of Education, No 20, 3rd Section of Renmin South Road, Chengdu, 610041, People's Republic of China.
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Wang G, Chen H, Xie X, Cao Q, Liao B, Jiang H, Shan Q, Zhong Z, Zhou W, Zhou L. 2D shear wave elastography combined with age and serum biomarkers prior to kasai surgery predicts native liver survival of biliary atresia infants. J Intern Med 2020; 288:570-580. [PMID: 32496659 DOI: 10.1111/joim.13097] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2020] [Revised: 04/28/2020] [Accepted: 04/28/2020] [Indexed: 02/06/2023]
Abstract
BACKGROUND The prognosis of patients with biliary atresia (BA) after Kasai portoenterostomy (KPE) varies, and precisely predicting the outcomes of KPE before surgery is still challenging. METHODS A total of 158 patients who underwent KPE in our hospital were included in this study. The patients in the training cohort were recruited from January 2012 to October 2017 (n = 118), and then, those in the validation cohort were recruited from November 2017 to April 2019 (n = 40). Combined nomogram models were developed based on two-dimensional shear wave elastography (2D SWE) values and other biomarkers. The utility of the proposed models was evaluated by C-index. RESULTS 2D SWE played a potentially important role in predicting native liver survival (NLS) of BA patients with a C-index of 0.69 (0.63 to 0.75) in the training cohort and 0.76 (0.67 to 0.85) in the validation cohort. The nomogram A based on 2D SWE values, age, gamma-glutamyl transferase (GGT) and aspartate aminotransferase-to-platelet ratio (APRI) had a better C-index in the training cohort [0.74 (0.68-0.80) vs. 0.66 (0.60-0.73), P = 0.017] and in the validation cohort [0.78 (0.70-0.86) vs. 0.60 (0.49-0.71), P = 0.002] than the nomogram B (without 2D SWE). Using risk score developed from nomogram A, we successfully predicted 88.0% (22/25) of patients in the training cohort and 75.0% (9/12) in the validation cohort to have survival time of less than 12 months after KPE. CONCLUSION The combined nomogram model based on 2D SWE values, age, GGT and APRI prior to KPE can effectively predict NLS in BA infants.
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Affiliation(s)
- G Wang
- From the, Department of Medical Ultrasonics, Institute of Diagnostic and Interventional Ultrasound, the First Affiliated Hospital of Sun Yat-sen University, Sun Yat-sen University, Guangzhou, China
| | - H Chen
- Department of Pediatric Surgery, the First Affiliated Hospital of Sun Yat-sen University, Sun Yat-sen University, Guangzhou, China
| | - X Xie
- From the, Department of Medical Ultrasonics, Institute of Diagnostic and Interventional Ultrasound, the First Affiliated Hospital of Sun Yat-sen University, Sun Yat-sen University, Guangzhou, China
| | - Q Cao
- Department of Pathoglogy, the First Affiliated Hospital of Sun Yat-sen University, Sun Yat-sen University, Guangzhou, China
| | - B Liao
- Department of Pathoglogy, the First Affiliated Hospital of Sun Yat-sen University, Sun Yat-sen University, Guangzhou, China
| | - H Jiang
- Department of Pediatric Surgery, the First Affiliated Hospital of Sun Yat-sen University, Sun Yat-sen University, Guangzhou, China
| | - Q Shan
- From the, Department of Medical Ultrasonics, Institute of Diagnostic and Interventional Ultrasound, the First Affiliated Hospital of Sun Yat-sen University, Sun Yat-sen University, Guangzhou, China
| | - Z Zhong
- Department of Pediatric Surgery, the First Affiliated Hospital of Sun Yat-sen University, Sun Yat-sen University, Guangzhou, China
| | - W Zhou
- From the, Department of Medical Ultrasonics, Institute of Diagnostic and Interventional Ultrasound, the First Affiliated Hospital of Sun Yat-sen University, Sun Yat-sen University, Guangzhou, China
| | - L Zhou
- From the, Department of Medical Ultrasonics, Institute of Diagnostic and Interventional Ultrasound, the First Affiliated Hospital of Sun Yat-sen University, Sun Yat-sen University, Guangzhou, China
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Qiu Y, Yang J, Chen Y, Yang J, Zhu Q, Zhu C, Li S, Liu J, Wan C, Zhu Y, Chen M, Xu Y, Tong J, Li R, Shan Q, Lin D, Wu S, Zhuo Z, Wang C, Zhao S, Qi Z, Sun X, Maihebuba B, Jia C, Gao H, Cheng Y, Zeng M. Microbiological profiles and antimicrobial resistance patterns of pediatric bloodstream pathogens in China, 2016-2018. Eur J Clin Microbiol Infect Dis 2020; 40:739-749. [PMID: 33078219 DOI: 10.1007/s10096-020-04069-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2020] [Accepted: 10/09/2020] [Indexed: 10/23/2022]
Abstract
OBJECTIVES This study aimed to investigate the microbiological profiles and antimicrobial resistance patterns of bloodstream pathogens in Chinese children. METHODS This retrospective study was conducted at 13 tertiary hospitals in China during 2016-2018. The first bloodstream isolates of the same species from one pediatric patient < 18 years were included to this study for analysis. Antimicrobial susceptibility testing was determined based on minimum inhibitory concentrations or Kirby-Bauer disk diffusion methods according to the 2018 Clinical and Laboratory Standards Institute guidelines. RESULTS Overall, 9345 nonduplicate bloodstream isolates were collected. Top 10 pathogens included Coagulase-negative staphylococcus (CoNS) (44.4%), Escherichia coli (10.2%), Klebsiella pneumoniae (5.9%), Staphylococcus aureus (5.0%), Streptococcus pneumoniae (4.9%), Pseudomonas aeruginosa(2.8%), Enterococcus faecium (2.7%), Stenotrophomonas maltophilia (2.4%), Salmonella spp. (2.3%), and Streptococcus agalactiae (2.0%). The commonest pathogens apart from CoNS in age group 0-28 days, 29 days-2 months, 3-11 months, 1-5 years, and ≥ 5 years were Escherichia coli (17.2%), Escherichia coli (14.0%), Escherichia coli (7.9%), Streptococcus pneumoniae (10.7%) ,and Staphylococcus aureus (13.6%), respectively. The overall prevalence of extended-spectrum β-lactamases-producing Enterobacteriaceae, carbapenem-resistant Klebsiella pneumoniae, carbapenem-resistant Acinetobacter baumannii, and carbapenem-resistant Pseudomonas aeruginosa were 41.4, 28.4, 31.7, and 5.6%, respectively. The overall prevalence of methicillin-resistant Staphylococcus aureus, penicillin-resistant Streptococcus pneumoniae and vancomycin-resistant Enterococcus was 38.1, 28.3, and 0.7%, respectively. CONCLUSIONS The major bacterial pathogens have differences in different age groups, ward types, and regions in Chinese children, and the commonest causing microorganism was the Escherichia coli, especially in neonates and infants. High prevalence of important resistant phenotypes is of a serious concern.
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Affiliation(s)
- Yue Qiu
- Department of Infectious Diseases, Children's Hospital of Fudan University, 399 Wanyuan Road, Shanghai, 201102, China
| | - Junwen Yang
- Department of Microbiology Laboratory, Children's Hospital Affiliated to Zhengzhou University (Henan Children's Hospital), Zhengzhou, China
| | - Yiping Chen
- Department of Pediatrics, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Jinhong Yang
- Department of Microbiology Laboratory, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, Wenzhou, China
| | - Qingxiong Zhu
- Department of Infection Diseases, Children's hospital of Jiangxi Province, Nanchang, China
| | - Chunhui Zhu
- Department of Infection Diseases, Children's hospital of Jiangxi Province, Nanchang, China
| | - Shuangjie Li
- Department of Hepatology, Hunan Children's Hospital, Changsha, China
| | - Jing Liu
- Department of Infection Diseases, Hunan Children's Hospital, Changsha, China
| | - Chaomin Wan
- Department of Pediatrics, Sichuan University West China Second Hospital, Chengdu, China
| | - Yu Zhu
- Department of Pediatrics, Sichuan University West China Second Hospital, Chengdu, China
| | - Minxia Chen
- Department of Infections Disease, Guangzhou Women and Children's Medical Center, Guangzhou, China
| | - Yi Xu
- Department of Infections Disease, Guangzhou Women and Children's Medical Center, Guangzhou, China
| | - Jianning Tong
- Department of Pediatric, Gastroenterology and Infectious Diseases, Qingdao Women and Children's Hospital, Qingdao, China
| | - Rui Li
- Department of Pediatric, Gastroenterology and Infectious Diseases, Qingdao Women and Children's Hospital, Qingdao, China
| | - Qingwen Shan
- Department of Pediatrics, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Daojiong Lin
- Department of infectious diseases, Hainan Women and Children's Medical Center, Haikou, China
| | - Shouye Wu
- Department of infectious diseases, Hainan Women and Children's Medical Center, Haikou, China
| | - Zhiqiang Zhuo
- Department of infectious diseases, Xiamen Children's Hospital, Xiamen, China
| | - Caihong Wang
- Department of infectious diseases, Xiamen Children's Hospital, Xiamen, China
| | - Shiyong Zhao
- Department of Infectious Diseases, Hangzhou Children's Hospital, Hangzhou, China
| | - Zhenghong Qi
- Department of Infectious Diseases, Hangzhou Children's Hospital, Hangzhou, China
| | - Xiaofeng Sun
- Department of Infectious Diseases, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
| | - Bieerding Maihebuba
- Department of Infectious Diseases, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, China
| | - Chunmei Jia
- Department of Pharmacy, The fourth Hospital of Baotou, Baotou, China
| | - Huiling Gao
- Department of Pharmacy, The fourth Hospital of Baotou, Baotou, China
| | - Yibing Cheng
- Department of Emergency, Henan Children's Hospital Affiliated to Zhengzhou University, 33, Longhu Outer Ring East Road, Zhengzhou, 450018, China.
| | - Mei Zeng
- Department of Infectious Diseases, Children's Hospital of Fudan University, 399 Wanyuan Road, Shanghai, 201102, China.
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Ma FT, Shan Q, Jin YH, Gao D, Li HY, Chang MN, Sun P. Effect of Lonicera japonica extract on lactation performance, antioxidant status, and endocrine and immune function in heat-stressed mid-lactation dairy cows. J Dairy Sci 2020; 103:10074-10082. [PMID: 32896406 DOI: 10.3168/jds.2020-18504] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 06/25/2020] [Indexed: 12/25/2022]
Abstract
Here, we examined the effects of Lonicera japonica extract (LJE) on lactation performance, antioxidant status, and endocrine and immune function in heat-stressed mid-lactation dairy cows. Twenty-four healthy Chinese Holstein mid-lactation dairy cows, all with similar milk yield (30.0 ± 1.0 kg/d), parity (2.5 ± 0.3), and days in milk (105 ± 5 d) were allocated to 4 groups using a randomized complete block design: a negative control group (without LJE supplementation; CON) and groups that received LJE at 14, 28, and 56 g/d. The experiment lasted 10 wk over a hot summer, with a pre-feeding period of 2 wk. Cows were exposed to heat stress, as the average temperature-humidity index was greater than 72. The results showed that LJE had no effect on respiration rate; however, it reduced the rectal temperature of dairy cows experiencing heat stress in both a linear and quadratic manner; the lowest (39.03°C) was recorded for the LJE-28 group, lower than the CON group. Supplementation with LJE did not affect dry matter intake, milk yield, or milk composition. The majority of biochemical parameters in serum were unaffected by supplementation with different amounts of LJE; the exception was creatinine, which was reduced quadratically. Compared with the CON group, serum triiodothyronine concentrations increased significantly in the LJE-28 group. Addition of LJE to the diet increased thyroxine concentrations quadratically; values peaked at 18.62 ng/mL in the LJE-28 group. Furthermore, supplementation with increasing amounts of LJE quadratically increased the activity of glutathione peroxidase and total antioxidant capacity in serum but decreased concentration of malondialdehyde. Although we detected no differences in the concentrations of IgA, IgM, or cytokines, dairy cows in the LJE-28 group had higher IgG and IL-4 concentrations than did cows in the CON group. Supplementation with LJE increased concentrations of IgG and IL-4 in the serum quadratically but decreased that of IL-2. Finally, heat shock protein 72 concentrations in the serum tended to fall quadratically as the amount of LJE increased. In summary, LJE had no negative effects on lactation performance but helped to alleviate heat stress by improving antioxidant status and promoting endocrine and immune functions. Supplementation with LJE at 28 g/d is recommended for lactating dairy cows experiencing heat stress during hot summers.
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Affiliation(s)
- F T Ma
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Q Shan
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - Y H Jin
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - D Gao
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - H Y Li
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - M N Chang
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China
| | - P Sun
- State Key Laboratory of Animal Nutrition, Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing, 100193, China.
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Wang CN, Huttner BD, Magrini N, Cheng Y, Tong J, Li S, Wan C, Zhu Q, Zhao S, Zhuo Z, Lin D, Yi B, Shan Q, Long M, Jia C, Zhao D, Sun X, Liu J, Zhou Y, Li R, Liu J, Zhu Y, Miao R, Zhu C, Qi Z, Wang C, Wu S, Xu X, Zhou L, Ye W, Luo N, Gao H, Yang P, Bieerding M, Tang J, Zeng M. Pediatric Antibiotic Prescribing in China According to the 2019 World Health Organization Access, Watch, and Reserve (AWaRe) Antibiotic Categories. J Pediatr 2020; 220:125-131.e5. [PMID: 32093934 DOI: 10.1016/j.jpeds.2020.01.044] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 01/14/2020] [Accepted: 01/15/2020] [Indexed: 12/31/2022]
Abstract
OBJECTIVES To assess clinical indication-specific antibiotic prescribing in pediatric practice in China based on the World Health Organization (WHO) Access, Watch, and Reserve (AWaRe) metrics and to detect potential problem areas. STUDY DESIGN Pediatric prescription records on the 16th of each month during 2018 were sampled for all encounters at outpatient and emergency departments of 16 tertiary care hospitals via hospital information systems. Antibiotic prescribing patterns were analyzed across and within diagnostic conditions according to WHO AWaRe metrics and Anatomical Therapeutic Chemical (ATC) classification. RESULTS A total of 260 001 pediatric encounters were assessed, and antibiotics were prescribed in 94 453 (36.3%). In 35 167 encounters (37.2%), at least 1 intravenous antibiotic was administered. WHO Watch group antibiotics accounted for 82.2% (n = 84 176) of all antibiotic therapies. Azithromycin (n = 15 791; 15.4%) was the most commonly prescribed antibiotic, and third-generation cephalosporins (n = 44 387; 43.3%) were the most commonly prescribed antibiotic class. In at least 66 098 encounters (70.0%), antibiotics were prescribed for respiratory tract conditions, mainly for bronchitis/bronchiolitis (n = 25 815; 27.3%), upper respiratory tract infection (n = 25 184; 26.7%), and pneumonia (n = 13 392; 14.2%). CONCLUSIONS Overuse and misuse of WHO Watch group antibiotics for respiratory tract conditions and viral infectious diseases is common in pediatric outpatients in China. Pediatric antimicrobial stewardship should be strengthened using WHO AWaRe metrics.
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Affiliation(s)
- Chu-Ning Wang
- Department of Infectious Diseases, Children's Hospital of Fudan University, Shanghai, China
| | - Benedikt D Huttner
- Division of Infectious Diseases, Geneva University Hospitals and Faculty of Medicine, University of Geneva, Geneva, Switzerland
| | - Nicola Magrini
- Department of Essential Medicines and Health Products, World Health Organization, Geneva, Switzerland
| | - Yibing Cheng
- Emergency Department, Henan Children's Hospital Affiliated to Zhengzhou University, Zhengzhou, China
| | - Jianning Tong
- Department of Pediatric Gastroenterology and Infectious Diseases, Qingdao Women and Children's Hospital, Qingdao, China
| | - Shuangjie Li
- Department of Hepatology, Hunan Children's Hospital, Changsha, China
| | - Chaomin Wan
- Department of Pediatrics, West China Second Hospital, Sichuan University, Chengdu, China
| | - Qingxiong Zhu
- Department of Infectious Diseases, Jiangxi Provincial Children's Hospital, Nanchang, China
| | - Shiyong Zhao
- Department of Infectious Diseases, Hangzhou Children's Hospital, Hangzhou, China
| | - Zhiqiang Zhuo
- Department of Infectious Diseases, Xiamen Children's Hospital, Xiamen, China
| | - Daojiong Lin
- Department of Infectious Diseases, Hainan Women and Children's Medical Center, Hainan, China
| | - Bin Yi
- Department of Neonatology, Gansu Provincial Maternity and Child Care Hospital, Lanzhou, China
| | - Qingwen Shan
- Department of Pediatrics, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Mei Long
- Department of Pediatric Gastroenterology, Guiyang Maternal and Child Hospital, Guiyang, China
| | - Chunmei Jia
- Department of Pediatrics, The Fourth Hospital of Baotou, Baotou, China
| | - Dongchi Zhao
- Department of Pediatrics, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Xiaofeng Sun
- Department of Infectious Diseases, The First Affiliated Hospital of Xinjiang Medical University, Wulumuqi, China
| | - Juan Liu
- Department of Pediatrics, Nanchong Central Hospital, The Second Clinical Medical College, North Sichuan Medical College, Nanchong, China
| | - Yibo Zhou
- Department of General Pediatrics, Henan Children's Hospital Affiliated to Zhengzhou University, Zhengzhou, China
| | - Rui Li
- Department of Pediatric Gastroenterology and Infectious Diseases, Qingdao Women and Children's Hospital, Qingdao, China
| | - Jing Liu
- Department of Infectious Diseases, Hunan Children's Hospital, Changsha, China
| | - Yu Zhu
- Department of Pediatrics, West China Second Hospital, Sichuan University, Chengdu, China
| | - Ruixue Miao
- Department of Pediatrics, West China Second Hospital, Sichuan University, Chengdu, China
| | - Chunhui Zhu
- Department of Infectious Diseases, Jiangxi Provincial Children's Hospital, Nanchang, China
| | - Zhenghong Qi
- Department of Infectious Diseases, Hangzhou Children's Hospital, Hangzhou, China
| | - Caihong Wang
- Department of Infectious Diseases, Xiamen Children's Hospital, Xiamen, China
| | - Shouye Wu
- Department of Infectious Diseases, Hainan Women and Children's Medical Center, Hainan, China
| | - Xiaohong Xu
- Department of Digestive Infection, Gansu Provincial Maternity and Child Care Hospital, Lanzhou, China
| | - Li Zhou
- Department of Digestive Infection, Gansu Provincial Maternity and Child Care Hospital, Lanzhou, China
| | - Wenyu Ye
- Department of Pediatrics, The First Affiliated Hospital of Guangxi Medical University, Nanning, China
| | - Na Luo
- Department of Pediatric Gastroenterology, Guiyang Maternal and Child Hospital, Guiyang, China
| | - Huiling Gao
- Department of Pharmacy, The Fourth Hospital of Baotou, Baotou, China
| | - Pu Yang
- Department of Pediatrics, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Maihebuba Bieerding
- Department of Infectious Diseases, The First Affiliated Hospital of Xinjiang Medical University, Wulumuqi, China
| | - Jie Tang
- Department of Pharmacy, Nanchong Central Hospital, The Second Clinical Medical College, North Sichuan Medical College, Nanchong, China
| | - Mei Zeng
- Department of Infectious Diseases, Children's Hospital of Fudan University, Shanghai, China.
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10
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Shan Q, Wang J, Yang F, Ma L, Yin Y, Liu S, Li L, Zheng G. Pharmacokinetics of cefquinome in crucian carp (Carassius auratus gibelio) after oral, intramuscular, intraperitoneal, and bath administration. J Vet Pharmacol Ther 2018; 41:734-738. [PMID: 29654606 DOI: 10.1111/jvp.12510] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Accepted: 02/05/2018] [Indexed: 11/29/2022]
Abstract
The pharmacokinetics (PK) of cefquinome (CEQ) was studied in crucian carp (Carassius auratus gibelio) after single oral, intramuscular (i.m.), and intraperitoneal (i.p.) administration at a dose of 10 mg/kg body weight and following incubation in a 5 mg/L bath for 5 hr at 25°C. The plasma concentration of CEQ was determined using high-performance liquid chromatography (HPLC). PK parameters were calculated based on mean CEQ concentration using WinNonlin 6.1 software. The disposition of CEQ following oral, i.m., or i.p. administration was best described by a two-compartment open model with first-order absorption. After oral, i.m., and i.p. administration, the maximum plasma concentration (Cmax ) values were 1.52, 40.53, and 67.87 μg/ml obtained at 0.25, 0.23, and 0.35 hr, respectively, while the elimination half-life (T1/2β ) values were 4.68, 7.39, and 6.88 hr, respectively; the area under the concentration-time curve (AUC) values were 8.61, 339.11, and 495.06 μg hr/ml, respectively. No CEQ was detected in the plasma after bath incubation. Therapeutic blood concentrations of CEQ can be achieved in the crucian carp following i.m. and i.p. administration at a dosage of 10 mg/kg once every 2 days.
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Affiliation(s)
- Q Shan
- Key Laboratory of Recreational Fisheries Research, Ministry of Agriculture and Ministry of Agriculture Laboratory of Quality and Safety Risky Assessment for Aquatic Product, Pearl River Fisheries Research Institute, Chinese Academic of Fishery Science, Guangzhou, China
| | - J Wang
- Guangdong Provincial Key Laboratory of Laboratory Animals, Guangdong Laboratory Animals Monitoring Institute, Guangzhou, China
| | - F Yang
- Guangdong Provincial Key Laboratory of Laboratory Animals, Guangdong Laboratory Animals Monitoring Institute, Guangzhou, China
| | - L Ma
- Key Laboratory of Recreational Fisheries Research, Ministry of Agriculture and Ministry of Agriculture Laboratory of Quality and Safety Risky Assessment for Aquatic Product, Pearl River Fisheries Research Institute, Chinese Academic of Fishery Science, Guangzhou, China
| | - Y Yin
- Key Laboratory of Recreational Fisheries Research, Ministry of Agriculture and Ministry of Agriculture Laboratory of Quality and Safety Risky Assessment for Aquatic Product, Pearl River Fisheries Research Institute, Chinese Academic of Fishery Science, Guangzhou, China
| | - S Liu
- Key Laboratory of Recreational Fisheries Research, Ministry of Agriculture and Ministry of Agriculture Laboratory of Quality and Safety Risky Assessment for Aquatic Product, Pearl River Fisheries Research Institute, Chinese Academic of Fishery Science, Guangzhou, China
| | - L Li
- Key Laboratory of Recreational Fisheries Research, Ministry of Agriculture and Ministry of Agriculture Laboratory of Quality and Safety Risky Assessment for Aquatic Product, Pearl River Fisheries Research Institute, Chinese Academic of Fishery Science, Guangzhou, China
| | - G Zheng
- Key Laboratory of Recreational Fisheries Research, Ministry of Agriculture and Ministry of Agriculture Laboratory of Quality and Safety Risky Assessment for Aquatic Product, Pearl River Fisheries Research Institute, Chinese Academic of Fishery Science, Guangzhou, China
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11
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Shan Q, Fan J, Wang J, Zhu X, Yin Y, Zheng G. Pharmacokinetics of enrofloxacin after oral, intramuscular and bath administration in crucian carp (Carassius auratus gibelio). J Vet Pharmacol Ther 2017; 41:159-162. [PMID: 28603916 DOI: 10.1111/jvp.12428] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Accepted: 05/10/2017] [Indexed: 11/29/2022]
Abstract
The pharmacokinetics of enrofloxacin (ENR) was studied in crucian carp (Carassius auratus gibelio) after single administration by intramuscular (IM) injection and oral gavage (PO) at a dose of 10 mg/kg body weight and by 5 mg/L bath for 5 hr at 25°C. The plasma concentrations of ENR and ciprofloxacin (CIP) were determined by HPLC. Pharmacokinetic parameters were calculated based on mean ENR or CIP concentrations using WinNonlin 6.1 software. After IM, PO and bath administration, the maximum plasma concentration (Cmax ) of 2.29, 3.24 and 0.36 μg/ml was obtained at 4.08, 0.68 and 0 hr, respectively; the elimination half-life (T1/2β ) was 80.95, 62.17 and 61.15 hr, respectively; the area under the concentration-time curve (AUC) values were 223.46, 162.72 and 14.91 μg hr/ml, respectively. CIP, an active metabolite of enrofloxacin, was detected and measured after all methods of drug administration except bath. It is possible and practical to obtain therapeutic blood concentrations of enrofloxacin in the crucian carp using IM, PO and bath immersion administration.
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Affiliation(s)
- Q Shan
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation of Ministry of Agriculture, Pearl River Fisheries Research Institute, Chinese Academic of Fishery Science, Guangzhou, China
| | - J Fan
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation of Ministry of Agriculture, Pearl River Fisheries Research Institute, Chinese Academic of Fishery Science, Guangzhou, China
| | - J Wang
- Guangdong Provincial Key Laboratory of Laboratory Animals, Guangdong Laboratory Animals Monitoring Institute, Guangzhou, China
| | - X Zhu
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation of Ministry of Agriculture, Pearl River Fisheries Research Institute, Chinese Academic of Fishery Science, Guangzhou, China
| | - Y Yin
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation of Ministry of Agriculture, Pearl River Fisheries Research Institute, Chinese Academic of Fishery Science, Guangzhou, China
| | - G Zheng
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation of Ministry of Agriculture, Pearl River Fisheries Research Institute, Chinese Academic of Fishery Science, Guangzhou, China
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12
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Lu D, Wang K, Wang S, Zhang B, Liu Q, Zhang Q, Geng J, Shan Q. Beneficial effects of renal denervation on cardiac angiogenesis in rats with prolonged pressure overload. Acta Physiol (Oxf) 2017; 220:47-57. [PMID: 27575955 DOI: 10.1111/apha.12793] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 06/20/2016] [Accepted: 08/29/2016] [Indexed: 01/20/2023]
Abstract
AIM Renal denervation (RDN) has beneficial effects on cardiac remodelling and function in resistant hypertension. We aimed to investigate the impact of RDN on cardiac angiogenesis during prolonged pressure overload. METHODS Cardiac pressure overload was reproduced by transverse aorta constriction (TAC) procedure in adult Sprague Dawley male rats (n = 35). RDN/sham-RDN procedure was performed in surviving rats at 5 weeks after TAC. RESULTS Five weeks post-TAC, transthoracic echocardiography revealed that myocardial hypertrophy occurred in TAC rats, with ejection fraction and fractional shortening not significantly changed. At the end of 10 weeks, cardiac systolic function was preserved in RDN group, but not in sham group. CD31 immunohistochemical staining showed that RDN-treated rats had higher cardiac capillary density than sham rats. However, no significant between-group difference was observed in the kidneys. A decreased protein expression of left ventricle vascular endothelial growth factor (VEGF) was observed in sham group, while RDN attenuated this decrease. Compared with sham, RDN resulted in a higher protein expression of VEGF receptor 2 (VEGFR2) and phosphorylated endothelial nitric oxide synthase (p-eNOS) in the heart. CONCLUSION Renal denervation benefits cardiac angiogenesis during sustained pressure overload, involving regulation of VEGF and VEGFR2 expression as well as activation of eNOS.
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Affiliation(s)
- D. Lu
- Department of Cardiology; The First Affiliated Hospital of Nanjing Medical University; Nanjing Jiangsu China
| | - K. Wang
- Department of Cardiology; The First Affiliated Hospital of Nanjing Medical University; Nanjing Jiangsu China
| | - S. Wang
- Department of Cardiology; The First Affiliated Hospital of Nanjing Medical University; Nanjing Jiangsu China
| | - B. Zhang
- Department of Cardiology; The First Affiliated Hospital of Nanjing Medical University; Nanjing Jiangsu China
| | - Q. Liu
- Department of Cardiology; The First Affiliated Hospital of Nanjing Medical University; Nanjing Jiangsu China
| | - Q. Zhang
- Department of Cardiology; The First Affiliated Hospital of Nanjing Medical University; Nanjing Jiangsu China
| | - J. Geng
- Department of Cardiology; The First Affiliated Hospital of Nanjing Medical University; Nanjing Jiangsu China
| | - Q. Shan
- Department of Cardiology; The First Affiliated Hospital of Nanjing Medical University; Nanjing Jiangsu China
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13
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Fan J, Shan Q, Wang J, Liu S, Li L, Zheng G. Comparative pharmacokinetics of enrofloxacin in healthy and Aeromonas hydrophila-
infected crucian carp (Carassius auratus gibelio
). J Vet Pharmacol Ther 2017; 40:580-582. [DOI: 10.1111/jvp.12392] [Citation(s) in RCA: 10] [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] [Received: 08/01/2016] [Accepted: 12/04/2016] [Indexed: 11/27/2022]
Affiliation(s)
- J. Fan
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation of Ministry of Agriculture; Pearl River Fisheries Research Institute; Chinese Academic of Fishery Science; Guangzhou China
- College of Fisheries and Life Science; Shanghai Ocean University; Shanghai China
| | - Q. Shan
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation of Ministry of Agriculture; Pearl River Fisheries Research Institute; Chinese Academic of Fishery Science; Guangzhou China
| | - J. Wang
- Guangdong Provincial Key Laboratory of Laboratory Animals; Guangdong Laboratory Animals Monitoring Institute; Guangzhou China
| | - S. Liu
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation of Ministry of Agriculture; Pearl River Fisheries Research Institute; Chinese Academic of Fishery Science; Guangzhou China
| | - L. Li
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation of Ministry of Agriculture; Pearl River Fisheries Research Institute; Chinese Academic of Fishery Science; Guangzhou China
| | - G. Zheng
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation of Ministry of Agriculture; Pearl River Fisheries Research Institute; Chinese Academic of Fishery Science; Guangzhou China
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14
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Shan Q, Wang J. Activity of cefquinome against extended-spectrum β-lactamase-producing Klebsiella pneumoniae in neutropenic mouse thigh model. J Vet Pharmacol Ther 2016; 40:392-397. [PMID: 27682189 DOI: 10.1111/jvp.12365] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2016] [Accepted: 09/05/2016] [Indexed: 11/30/2022]
Abstract
Increasing prevalence of extended-spectrum β-lactamase (ESBL)-producing Klebsiella pneumoniae (K. pneumoniae) is of clinical concern. The objective of our study was to examine the in vivo activity of cefquinome against ESBL-producing K. pneumoniae strain using a neutropenic mouse thigh infection model. Cefquinome kinetics and protein binding in infected neutropenic mice were measured by liquid chromatography-tandem mass spectrometry (LC-MS/MS). Dose-fractionation studies over a 24-h dose range of 2.5-320 mg/kg were administered every 3, 6, 12, or 24 h. The percentage of the dosing interval that the free-drug serum levels exceed the MIC (%fT > MIC) was the PK-PD index that best correlated with cefquinome efficacy (R2 = 86%). Using a sigmoid Emax model, the magnitudes of %fT > MIC producing net bacterial stasis, a 1-log10 kill and a 2-log10 kill over 24 h, were estimated to be 20.07%, 29.57%, and 55.12%, respectively. These studies suggest that optimal cefquinome PK/PD targets are not achieved in pigs, sheep, and cattle at current recommended doses (1˜2 mg/kg). Further studies with higher doses in the target species are needed to ensure therapeutic concentration, if cefquinome is used for treatment of K. pneumoniae infection.
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Affiliation(s)
- Q Shan
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation of Ministry of Agriculture, Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
| | - J Wang
- Guangdong Laboratory Animals Monitoring Institute, Guangdong Provincial Key Laboratory of Laboratory Animals, Guangzhou, China
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15
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Zhang Q, Chen Y, Liu Q, Shan Q. Effects of renin-angiotensin-aldosterone system inhibitors on mortality, hospitalization, and diastolic function in patients with HFpEF. A meta-analysis of 13 randomized controlled trials. Herz 2015; 41:76-86. [PMID: 26272273 DOI: 10.1007/s00059-015-4346-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Revised: 07/16/2015] [Accepted: 07/16/2015] [Indexed: 01/19/2023]
Abstract
AIM The purpose of this meta-analysis was to evaluate the effects of renin-angiotensin-aldosterone system (RAAS) inhibitors on mortality, hospitalization, diastolic function, and exercise capacity in heart failure with preserved ejection fraction (HFpEF). METHODS Thirteen randomized controlled trials (RCTs), totaling 12,532 patients with HFpEF, were selected. All-cause and cardiovascular mortality, all-cause and heart failure-related hospitalization, diastolic function, and the 6-min walk distance were assessed. The risk ratios (RR) of the dichotomous data, weighted mean difference (WMD) of continuous data, and 95 % confidence intervals (CI) were calculated to assess the effects of RAAS inhibitors. RESULTS RAAS inhibitors significantly decreased heart failure-related hospitalization (RR 0.89; 95 % CI 0.82-0.97; p = 0.01) and improved the diastolic function, as reflected in a reduced E/e' index (MD -1.38; 95 % CI -2.01 to -0.74; p < 0.0001). However, there were no beneficial effects on all-cause cardiovascular mortality and all-cause hospitalization. Other diastolic parameters had few changes compared with the controls. The 6-min walk distance was not improved by the use of RAAS inhibitors. CONCLUSION In patients with HFpEF, RAAS inhibitors decreased heart-failure hospitalization and the E/e' index without affecting mortality, all-cause hospitalization, other diastolic function parameters, and the 6-min walk distance.
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Affiliation(s)
- Q Zhang
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, 210029, Jiangsu, China
| | - Y Chen
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, 210029, Jiangsu, China
| | - Q Liu
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, 210029, Jiangsu, China
| | - Q Shan
- Department of Cardiology, The First Affiliated Hospital of Nanjing Medical University, 210029, Jiangsu, China. .,Department of Cardiovascular Medicine, The First Affiliated Hospital of Nanjing Medical University, Guangzhou road 300, 210029, Nanjing, Jiangsu Province, China.
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16
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Shan Q, Zhu X, Liu S, Bai Y, Ma L, Yin Y, Zheng G. Pharmacokinetics of cefquinome in tilapia (Oreochromis niloticus) after a single intramuscular or intraperitoneal administration. J Vet Pharmacol Ther 2015; 38:601-5. [PMID: 25707428 DOI: 10.1111/jvp.12219] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Accepted: 02/04/2015] [Indexed: 11/28/2022]
Abstract
The pharmacokinetics of cefquinome was studied in plasma after a single dose (10 mg/kg) of intramuscular (i.m.) or intraperitoneal (i.p.) administration to tilapia (Oreochromis niloticus) in freshwater at 30 °C. Ten fish per sampling point were examined after treatment. The data were fitted to two-compartment open models following both routes of administration. The estimates of total body clearance (CL/F), volume of distribution (Vd/F), and absorption half-life (T1/2ka ) were 0.049 and 0.037 L/h/kg, 0.41 and 0.33 L/kg, and 0.028 and 0.035 h following i.m. and i.p. administration, respectively. After i.m. injection, the elimination half-life (T1⁄2β ) was calculated to be 5.81 h, the maximum plasma concentration (Cmax ) to be 49.40 μg/mL, the time to peak plasma cefquinome concentration (Tmax ) to be 0.14 h, and the area under the plasma concentration-time curve (AUC) to be 204.6 μg h/mL. Following i.p. administration, the corresponding estimates were 6.05 h, 44.39 μg/mL, 0.17 h and 267.8 μg h/mL. The minimum inhibitory concentrations of cefquinome, determined for 30 strains of Streptococcus agalactiae isolated from diseased tilapia, ranged from 0.015 to 0.12 μg/mL. Results from these studies support that 10 mg cefquinome/kg body weight daily could be expected to control tilapia bacterial pathogens inhibited in vitro by a minimal inhibitory concentration value of ≤2 μg/mL.
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Affiliation(s)
- Q Shan
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation of Ministry of Agriculture and Ministry of Agriculture Laboratory of Quality & Safety Risky Assessment for Aquatic Product, Pearl River Fisheries Research Institute, Chinese Academic of Fishery Science, Guangzhou, China
| | - X Zhu
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation of Ministry of Agriculture and Ministry of Agriculture Laboratory of Quality & Safety Risky Assessment for Aquatic Product, Pearl River Fisheries Research Institute, Chinese Academic of Fishery Science, Guangzhou, China
| | - S Liu
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation of Ministry of Agriculture and Ministry of Agriculture Laboratory of Quality & Safety Risky Assessment for Aquatic Product, Pearl River Fisheries Research Institute, Chinese Academic of Fishery Science, Guangzhou, China
| | - Y Bai
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation of Ministry of Agriculture and Ministry of Agriculture Laboratory of Quality & Safety Risky Assessment for Aquatic Product, Pearl River Fisheries Research Institute, Chinese Academic of Fishery Science, Guangzhou, China
| | - L Ma
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation of Ministry of Agriculture and Ministry of Agriculture Laboratory of Quality & Safety Risky Assessment for Aquatic Product, Pearl River Fisheries Research Institute, Chinese Academic of Fishery Science, Guangzhou, China
| | - Y Yin
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation of Ministry of Agriculture and Ministry of Agriculture Laboratory of Quality & Safety Risky Assessment for Aquatic Product, Pearl River Fisheries Research Institute, Chinese Academic of Fishery Science, Guangzhou, China
| | - G Zheng
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation of Ministry of Agriculture and Ministry of Agriculture Laboratory of Quality & Safety Risky Assessment for Aquatic Product, Pearl River Fisheries Research Institute, Chinese Academic of Fishery Science, Guangzhou, China
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17
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Shan Q, Zheng G, Liu S, Bai Y, Li L, Yin Y, Ma L, Zhu X. Pharmacokinetic/pharmacodynamic relationship of marbofloxacin against Aeromonas hydrophila
in Chinese soft-shelled turtles (Trionyx sinensis
). J Vet Pharmacol Ther 2015; 38:537-42. [DOI: 10.1111/jvp.12214] [Citation(s) in RCA: 14] [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] [Received: 10/09/2014] [Accepted: 01/20/2015] [Indexed: 11/29/2022]
Affiliation(s)
- Q. Shan
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation of Ministry of Agriculture; Pearl River Fisheries Research Institute; Chinese Academy of Fishery Sciences; Guangzhou China
| | - G. Zheng
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation of Ministry of Agriculture; Pearl River Fisheries Research Institute; Chinese Academy of Fishery Sciences; Guangzhou China
| | - S. Liu
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation of Ministry of Agriculture; Pearl River Fisheries Research Institute; Chinese Academy of Fishery Sciences; Guangzhou China
| | - Y. Bai
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation of Ministry of Agriculture; Pearl River Fisheries Research Institute; Chinese Academy of Fishery Sciences; Guangzhou China
| | - L. Li
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation of Ministry of Agriculture; Pearl River Fisheries Research Institute; Chinese Academy of Fishery Sciences; Guangzhou China
| | - Y. Yin
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation of Ministry of Agriculture; Pearl River Fisheries Research Institute; Chinese Academy of Fishery Sciences; Guangzhou China
| | - L. Ma
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation of Ministry of Agriculture; Pearl River Fisheries Research Institute; Chinese Academy of Fishery Sciences; Guangzhou China
| | - X. Zhu
- Key Laboratory of Tropical and Subtropical Fishery Resource Application and Cultivation of Ministry of Agriculture; Pearl River Fisheries Research Institute; Chinese Academy of Fishery Sciences; Guangzhou China
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Yang F, Li ZL, Shan Q, Zeng ZL. Pharmacokinetics of doxycycline in tilapia (Oreochromis aureus × Oreochromis niloticus) after intravenous and oral administration. J Vet Pharmacol Ther 2014; 37:388-93. [PMID: 24479741 DOI: 10.1111/jvp.12095] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Accepted: 11/05/2013] [Indexed: 11/27/2022]
Abstract
The pharmacokinetics of doxycycline was studied in plasma after a single dose (20 mg/kg) of intravenous or oral administration to tilapia (Oreochromis aureus × Oreochromis niloticus) reared in fresh water at 24 °C. Plasma samples were collected from six fish per sampling point. Doxycycline concentrations were determined by high-performance liquid chromatography with a 0.005 μg/mL limit of detection, then were subjected to noncompartmental analysis. Following oral administration, the double-peak phenomenon was observed, and the first (Cmax1 ) and second (Cmax2) peaks were 1.99 ± 0.43 μg/mL at 2.0 h and 2.27 ± 0.38 μg/mL at 24.0 h, respectively. After the intravenous injection, a Cmax2 (12.12 ± 1.97 μg/mL) was also observed, and initial concentration of 45.76 μg/mL, apparent elimination rate constant (λz) of 0.018 per h, apparent elimination half-life (t1/2λz) of 39.0 h, systemic total body clearance (Cl) of 41.28 mL/h/kg, volume of distribution (Vz) of 2323.21 mL/kg, and volume of distribution at steady-state (Vss) of 1356.69 mL/kg were determined, respectively. While after oral administration, the λz, t1/2λz, and bioavailability of doxycycline were 0.009 per h, 77.2 h, and 23.41%, respectively. It was shown that doxycycline was relatively slowly and incompletely absorbed, extensively distributed, and slowly eliminated in tilapia, in addition, doxycycline might undergo enterohepatic recycling in tilapia.
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Affiliation(s)
- F Yang
- College of Animal Science and Technology, Henan University of Science and Technology, Luoyang, China; College of Veterinary Medicine, South China Agricultural University, Guangzhou, China
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Le Floch JM, Fan Y, Aubourg M, Cros D, Carvalho NC, Shan Q, Bourhill J, Ivanov EN, Humbert G, Madrangeas V, Tobar ME. Rigorous analysis of highly tunable cylindrical transverse magnetic mode re-entrant cavities. Rev Sci Instrum 2013; 84:125114. [PMID: 24387475 DOI: 10.1063/1.4848935] [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: 06/03/2023]
Abstract
Cylindrical re-entrant cavities are unique three-dimensional structures that resonate with their electric and magnetic fields in separate parts of the cavity. To further understand these devices, we undertake rigorous analysis of the properties of the resonance using "in-house" developed Finite Element Method (FEM) software capable of dealing with small gap structures of extreme aspect ratio. Comparisons between the FEM method and experiments are consistent and we illustrate where predictions using established lumped element models work well and where they are limited. With the aid of the modeling we design a highly tunable cavity that can be tuned from 2 GHz to 22 GHz just by inserting a post into a fixed dimensioned cylindrical cavity. We show this is possible, as the mode structure transforms from a re-entrant mode during the tuning process to a standard cylindrical transverse magnetic mode.
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Affiliation(s)
- J-M Le Floch
- School of Physics, University of Western Australia, 35 Stirling Hwy, 6009 Crawley, Western Australia, Australia
| | - Y Fan
- School of Physics, University of Western Australia, 35 Stirling Hwy, 6009 Crawley, Western Australia, Australia
| | - M Aubourg
- XLIM, UMR CNRS No. 6172, 123 av. A. Thomas, 87060 Limoges Cedex, France
| | - D Cros
- XLIM, UMR CNRS No. 6172, 123 av. A. Thomas, 87060 Limoges Cedex, France
| | - N C Carvalho
- School of Physics, University of Western Australia, 35 Stirling Hwy, 6009 Crawley, Western Australia, Australia
| | - Q Shan
- School of Physics, University of Western Australia, 35 Stirling Hwy, 6009 Crawley, Western Australia, Australia
| | - J Bourhill
- School of Physics, University of Western Australia, 35 Stirling Hwy, 6009 Crawley, Western Australia, Australia
| | - E N Ivanov
- School of Physics, University of Western Australia, 35 Stirling Hwy, 6009 Crawley, Western Australia, Australia
| | - G Humbert
- XLIM, UMR CNRS No. 6172, 123 av. A. Thomas, 87060 Limoges Cedex, France
| | - V Madrangeas
- XLIM, UMR CNRS No. 6172, 123 av. A. Thomas, 87060 Limoges Cedex, France
| | - M E Tobar
- School of Physics, University of Western Australia, 35 Stirling Hwy, 6009 Crawley, Western Australia, Australia
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20
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Shan Q, Yang F, Wang J, Ding H, He L, Zeng Z. Pharmacokinetic/pharmacodynamic relationship of cefquinome against Pasteurella multocida in a tissue-cage model in yellow cattle. J Vet Pharmacol Ther 2013; 37:178-85. [PMID: 23980645 DOI: 10.1111/jvp.12076] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Accepted: 07/15/2013] [Indexed: 11/29/2022]
Abstract
The cephalosporin antimicrobial drug cefquinome was administered to yellow cattle intravenously (i.v.) and intramuscularly (i.m.) at a dose of 1 mg/kg of body weight in a two-period crossover study. The pharmacokinetic (PK) properties of cefquinome in serum, inflamed tissue-cage fluid (exudate), and noninflamed tissue-cage fluid (transudate) were studied using a tissue-cage model. The in vitro and ex vivo activities of cefquinome in serum, exudate, and transudate against a pathogenic strain of Pasteurella multocida (P. multocida) were determined. A concentration-independent antimicrobial activity of cefquinome was confirmed for levels lower than 4 × MIC. Integration of in vivo pharmacokinetic data with the in vitro MIC provided mean values for the time that drug levels remain above the MIC (T > MIC) in serum was 14.10 h after intravenous and 14.46 h after intramuscular dosing, indicating a likely high level of effectiveness in clinical infections caused by P. multocida of MIC 0.04 μg/mL or less. These data may be used as a rational basis for setting dosing schedules, which optimize clinical efficacy and minimize the opportunities for emergence of resistant organisms.
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Affiliation(s)
- Q Shan
- National Reference Laboratory of Veterinary Drug Residues (SCAU), College of Veterinary Medicine, South China Agricultural University, Guangzhou, China; Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
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21
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Shan Q, Wang J, Yang F, Ding H, Liang C, Lv Z, Li Z, Zeng Z. Pharmacokinetic/pharmacodynamic relationship of marbofloxacin against Pasteurella multocida in a tissue-cage model in yellow cattle. J Vet Pharmacol Ther 2013; 37:222-30. [PMID: 24033339 DOI: 10.1111/jvp.12078] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2012] [Accepted: 07/18/2013] [Indexed: 11/29/2022]
Abstract
The fluoroquinolone antimicrobial drug marbofloxacin was administered to yellow cattle intravenously and intramuscularly at a dose of 2 mg/kg of body weight in a two-period crossover study. The pharmacokinetic properties of marbofloxacin in serum, inflamed tissue-cage fluid (exudate), and noninflamed tissue-cage fluid (transudate) were studied by using a tissue-cage model. The in vitro and ex vivo activities of marbofloxacin in serum, exudate, and transudate against a pathogenic strain of Pasteurella multocida (P. multocida) were determined. Integration of in vivo pharmacokinetic data with the in vitro MIC provided mean values for the area under the curve (AUC)/MIC for serum, exudate, and transudate of 155.75, 153.00, and 138.88, respectively, after intravenous dosing and 160.50, 151.00, and 137.63, respectively, after intramuscular dosing. After intramuscular dosing, the maximum concentration/MIC ratios for serum, exudate, and transudate were 21.13, 9.13, and 8.38, respectively. The ex vivo growth inhibition data after intramuscular dosing were fitted to the inhibitory sigmoid Emax equation to provide the values of AUC/MIC required to produce bacteriostasis, bactericidal activity, and elimination of bacteria. The respective values for serum were 17.25, 31.29, and 109.62, and slightly lower values were obtained for transudate and exudate. It is proposed that these findings might be used with MIC50 or MIC90 data to provide a rational approach to the design of dosage schedules which optimize efficacy in respect of bacteriological as well as clinical cures.
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Affiliation(s)
- Q Shan
- National Reference Laboratory of Veterinary Drug Residues (SCAU), College of Veterinary Medicine, South China Agricultural University, Guangzhou, China; Pearl River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Guangzhou, China
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22
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Chen K, Jin L, Zhu L, Shan Q, Su F. Abstract P1-01-09: Which nomograms may be the best for predicting nonsentinel lymph node metastasis in breast cancer patients: a meta-analysis. Cancer Res 2012. [DOI: 10.1158/0008-5472.sabcs12-p1-01-09] [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: 11/16/2022]
Abstract
Abstract
Background: Axillary lymph node dissection (ALND) is the standard treatment for breast cancer patients with positive sentinel lymph nodes (SLNs). Several nomograms were developed to identify SLN-positive patients with low risk of nonsentinel lymph nodes (NSLNs) metastasis. These nomograms were validated in different populations and it is still unknown which is the best. This study is to present a systemic review and perform a meta-analysis to obtained the pooled AUC (Area Under the receiver-operator Curve) value of each models.
Methods: This review focused on six models: Cambridge, MSKCC, Mayo, MDA, Tenon and Stanford models. A “Pubmed” search and “Web of science” search were conducted and 35 literatures were ultimately included. AUC and the number of patients with positive NSLNs were extracted. Publication bias and heterogeneity were analyzed. AUCs were converted to odds ratios (ORs) for combination. The combined ORs were converted back to AUCs to represent the integrated discriminative capabilities of each models.
Findings: In total, the Cambridge, Mayo, MDA, MSKCC, Stanford and Tenon models were validated in 8, 6, 4, 39, 14 and 15 studies, with 2156, 2431, 843, 8143, 3700 and 3648 patients included, respectively. There were no publication bias or heterogeneity observed in the Cambridge, Mayo, MDA and Tenon models (Table 1). The combined ORs and the corresponding AUCs of each models were listed as follow: Cambridge (OR = 3.86, AUC = 0.71), Mayo (OR = 3.71, AUC = 0.71), MSKCC (OR = 3.47, AUC = 0.70), MDA(OR = 3.44, AUC = 0.70), Tenon (OR = 3.46, AUC = 0.70) and Stanford (OR = 2.92, AUC = 0.67). For each of the predictive models, both fixed and random effect models were used to calculate the combined OR. The presence of larger difference between the fixed and random effect analysis suggests small study effects, rendering the meta-analysis relatively less reliable. The combined ORs were identical when fixed and random effect models were used in the Cambridge and MDA models, suggesting that there was no small study effects in these two models.
Conclusions: All of the included models are all better than random chance but not provide excellent discriminative capabilities. The Cambridge and Stanford models were relatively superior and inferior when compared with the other models, respectively.
Citation Information: Cancer Res 2012;72(24 Suppl):Abstract nr P1-01-09.
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Affiliation(s)
- K Chen
- Sun Yat-sen Memorial Hopsital, Guangzhou, Guangdong, China
| | - L Jin
- Sun Yat-sen Memorial Hopsital, Guangzhou, Guangdong, China
| | - L Zhu
- Sun Yat-sen Memorial Hopsital, Guangzhou, Guangdong, China
| | - Q Shan
- Sun Yat-sen Memorial Hopsital, Guangzhou, Guangdong, China
| | - F Su
- Sun Yat-sen Memorial Hopsital, Guangzhou, Guangdong, China
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Zheng B, Zhou R, Gong Y, Yang X, Shan Q. Proteasome inhibitor bortezomib overcomes P-gp-mediated multidrug resistance in resistant leukemic cell lines. Int J Lab Hematol 2011; 34:237-47. [PMID: 22145750 DOI: 10.1111/j.1751-553x.2011.01384.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
INTRODUCTION To study the effect of bortezomib alone or in combination with daunorubicin (DNR) on an mdr1 single-factor drug-resistant leukemia cell line K562/MDR1, a multifactor-resistant cell line K562/A02, a drug-sensitive cell line K562, and primary cells from acute myeloid leukemia patients. METHODS The cell lines were exposed to bortezomib, DNR, and bortezomib plus DNR, and cell proliferation, cell cycle, apoptosis rate, and expression of MDR1/BCL2 were analyzed. RESULTS Bortezomib potently inhibited growth and increased the apoptosis rate in the cell lines. In K562/MDR1 and K562/A02, the calcium channel blocker verapamil reduced the 50% inhibitory concentration and apoptosis rate of DNR, a P-gp protein substrate, but not of bortezomib. Bortezomib plus DNR had synergistic effect on antiproliferation (synergistic ratio > 1). Apoptosis was substantially more increased by the combination of two drugs than by bortezomib alone. Bortezomib arrested the cell cycles of three cell lines at the G2/M stage, decreased BCL2 mRNA expression, but did not affect MDR1 mRNA levels. The antiproliferative role of bortezomib was also confirmed in primary leukemia cells. CONCLUSION Bortezomib is a promising potential therapy for acute leukemia, especially mdr1 drug-resistant leukemia.
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Affiliation(s)
- B Zheng
- Department of Hematology and State Key Laboratory of Biotherapy, West China Hospital of Sichuan University, Chengdu, China
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24
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Yaduvanshi A, Kumar M, Kataria V, Arora V, Nair M, Ardashev AV, Rybachenko MS, Zhelyakov EG, Konev AV, Xv D, Yang B, Chen M, Zhang F, Ju W, Chen H, Zhai L, Wang J, Yu J, Shan Q, Zou J, Chen C, Hou X, Cao K, Termosesov S, Garipov R, Ilich I, Volkova Y, Zhang F, Chen M, Yang B, Chen H, Ju W, Xu D, Zou J, Shan Q, Cao K, Liu J, Fang PH, Hou Y, Jia YH, Chu JM, Yao Y, Ma J, Pu JL, Zhang S. Catheter Ablation. Europace 2011. [DOI: 10.1093/europace/euq469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Yang B, Chen M, Zhang F, Ju W, Chen H, Zhai L, Yang H, Wang J, Yu J, Shan Q, Zou J, Chen C, Hou X, Cao K, Chi SY, Ho D, Wong SP, Prasertwitayakij N, Vodnala D, Pridjian AK, Thakur RK, Tan VH, Lee L, Wah LB, Tan M, Khurana R, Liew R, Chow J, Madras A, Arena F, Barin E, Figtree G. Case Reports I. Europace 2011. [DOI: 10.1093/europace/euq486] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Yang B, Chen M, Zhang F, Ju W, Chen H, Zhao W, Zhai L, Wang J, Yu J, Shan Q, Zou J, Chen C, Dongjie X, Hou X, Cao K, Dong YX, Yang YZ, Oh JK, Mitsuru M, Powell BD, Larson MD, Buescher TL, Hodge DO, Packer DL, Cha YM, Liu J, Fang P, Hou Y, Li X, Hou C, Ma J, Pu J, Zhang S, Ju W, Yang B, Chen H, Zhang F, Zhai L, Cao K, Chen M, Yu S, Zhao Q, Qin M, Cui H, Huang H, Huang C. AF Ablation III. Europace 2011. [DOI: 10.1093/europace/euq472] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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27
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Mutig K, Saritas T, Uchida S, Kahl T, Borowski T, Paliege A, Böhlick A, Bleich M, Shan Q, Bachmann S. Short-term stimulation of the thiazide-sensitive Na+-Cl- cotransporter by vasopressin involves phosphorylation and membrane translocation. Am J Physiol Renal Physiol 2009; 298:F502-9. [PMID: 20007345 DOI: 10.1152/ajprenal.00476.2009] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Vasopressin influences salt and water transport in renal epithelia. This is coordinated by the combined action of V2 receptor-mediated effects along distinct nephron segments. Modulation of NaCl reabsorption by vasopressin has been established in the loop of Henle, but its role in the distal convoluted tubule (DCT), an effective site for fine regulation of urinary electrolyte composition and the target for thiazide diuretics, is largely unknown. The Na+-Cl- cotransporter (NCC) of DCT is activated by luminal trafficking and phosphorylation at conserved NH2-terminal residues. Here, we demonstrate the effects of short-term vasopressin administration (30 min) on NCC activation in Brattleboro rats with central diabetes insipidus (DI) using the V2 receptor agonist desmopressin (dDAVP). The fraction of NCC abundance in the luminal plasma membrane was significantly increased upon dDAVP as shown by confocal microscopy, immunogold cytochemistry, and Western blot, suggesting increased apical trafficking of the transporter. Changes were paralleled by augmented phosphorylation of NCC as detected by antibodies against phospho-threonine and phospho-serine residues (2.5-fold increase at Thr53 and 1.4-fold increase at Ser71). dDAVP-induced phosphorylation of NCC, studied in tubular suspensions in the absence of systemic effects, was enhanced as well (1.7-fold increase at Ser71), which points to the direct mode of action of vasopressin in DCT. Changes were more pronounced in early (DCT1) than in late DCT as distinguished by the distribution of 11beta-hydroxysteroid dehydrogenase 2 in DCT2. These results suggest that the vasopressin-V(2) receptor-NCC signaling cascade is a novel effector system to adjust transepithelial NaCl reabsorption in DCT.
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Zhan B, Hawdon J, Shan Q, Ren H, Qiang H, Xiao SH, Li TH, Feng Z, Hotez P. Construction and analysis of cDNA library of Necator americanus third stage larvae. Zhongguo Ji Sheng Chong Xue Yu Ji Sheng Chong Bing Za Zhi 2003; 18:26-8. [PMID: 12567467] [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: 02/28/2023]
Abstract
OBJECTIVE To obtain the genetic information on Necator americanus and to search for the purpose genes. METHODS mRNA was isolated from the third stage larvae of Necator americanus maintained in hamsters. Double strand cDNA was synthesized and ligated to lambda ZAPII vector to construct the cDNA library. Expressed sequence tages (ESTs) were obtained by single pass sequencing of randomly isolated cDNA clones from the established library. RESULTS A cDNA library of N. americanus was successfully constructed with high recombinant efficiency. The titer of unamplified library was 1 x 10(7). The insert size was about 750-3,000 bp. Of 11 ESTs obtained from the library, 7 have a significant homology with certain functional genes. CONCLUSION A high quality and high representative cDNA library of N. americanus was constructed at the first time and some functional genes were identified from the library by ESTs.
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Affiliation(s)
- B Zhan
- Institute of Parasitic Diseases, Chinese Academy of Preventive Medicine, WHO Collaborating Center for Malaria, Schistosomiasis and Filariasis, Shanghai, 200025
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Li T, Zhan B, Hawdon JM, Gong X, Xiao S, Shan Q, Feng Z, Hotez PJ. [Sequencing of cytochrome C oxidase 1 gene of Ancylostoma duodenale and Necator americanus]. Zhongguo Ji Sheng Chong Xue Yu Ji Sheng Chong Bing Za Zhi 2003; 17:81-3. [PMID: 12563786] [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: 02/28/2023]
Abstract
AIM To identify the genetic diversity between Ancylostoma duodenale and Necator americanus. METHODS Mitochondrial cytochrome C oxidase subunit 1 (CO1) gene was amplified from genomic DNA of human hookworms collected from infected patients in Hejiang County, Sichuan Province, and the purified PCR products were directly sequenced by using Licor auto-sequencer. RESULTS The PCR products were about 700 bp. Alignment of CO1 gene fragment sequences showed 89.7% similarity between Ancylostoma duodenale and Necator americanus, but still certain nucleotide variations (10.3%) existed. CONCLUSION CO1 gene sequence can be used as a marker to identify the two species of human hookworms.
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Affiliation(s)
- T Li
- Institute of Parasitic Diseases, Chinese Academy of Preventive Medicine, Shanghai 200025
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Abstract
The effects of the antihelmintic, ivermectin, were investigated in recombinantly expressed human alpha(1) homomeric and alpha(1)beta heteromeric glycine receptors (GlyRs). At low (0.03 microm) concentrations ivermectin potentiated the response to sub-saturating glycine concentrations, and at higher (> or =0.03 microm) concentrations it irreversibly activated both alpha(1) homomeric and alpha(1)beta heteromeric GlyRs. Relative to glycine-gated currents, ivermectin-gated currents exhibited a dramatically reduced sensitivity to inhibition by strychnine, picrotoxin, and zinc. The insensitivity to strychnine could not be explained by ivermectin preventing the access of strychnine to its binding site. Furthermore, the elimination of a known glycine- and strychnine-binding site by site-directed mutagenesis had little effect on ivermectin sensitivity, demonstrating that the ivermectin- and glycine-binding sites were not identical. Ivermectin strongly and irreversibly activated a fast-desensitizing mutant GlyR after it had been completely desensitized by a saturating concentration of glycine. Finally, a mutation known to impair dramatically the glycine signal transduction mechanism had little effect on the apparent affinity or efficacy of ivermectin. Together, these findings indicate that ivermectin activates the GlyR by a novel mechanism.
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Affiliation(s)
- Q Shan
- Department of Physiology and Pharmacology, University of Queensland, Brisbane, Queensland 4072, Australia
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Shan Q, Cao K, Huang Y, Liao M, Chen M, Li W, Zou J, Zhu B, Ma W. Clinical and familial study of arrhythmogenic right ventricular cardiomyopathy. Chin Med J (Engl) 2001; 114:369-73. [PMID: 11780456] [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: 02/23/2023] Open
Abstract
OBJECTIVE To explore the characteristics of arrhythmogenic right ventricular cardiomyopathy (ARVC). METHODS Seven patients with arrhythmogenic right ventricular cardiomyopathy and 34 members of three families were studied. All patients and family members underwent history collection, clinical examination, electrocardiogram (ECG), two-dimensional echocardiography (2-DE) and a signal averaging electrocardiogram. Programmed ventricular stimulation was performed in five patients. RESULTS All patients and family members had normal morphologic characteristics and normal function of the left ventricular by 2-DE. Fourteen persons had abnormal findings indicating ARVC. Five had enlargement of the right ventricular with diffused hypocontractility, eight had thin and systolic bulging in the focal anterior wall with hypokinesia and one had bulging of the inferior wall. Twenty-five persons (seven patients and 18 family members) had abnormal findings in ECG. Positive ventricular late potential was recorded in 13 persons (six patients). Two to three monomorphic ventricular tachycardia (VT) with left bundle branch block (LBBB) configurations were induced in five patients. Ventricular fibrillation was induced in two patients during the electrophysiologic study (EPS). Five patients had very high pacing threshold and/or ineffective pacing in one or many regions of the right ventricle. Two members of one family died suddenly. One member was a dwarf with ARVC. Spontaneous VT with a left bundle branch block (LBBB) configuration was recorded in five patients, polymorphic VT with extremely short coupling interval in one, and premature ventricular complexes with LBBB configuration in 12 (six patients). CONCLUSION Our familial study strongly suggests that ARVC may be a hereditary disease and it is helpful in the diagnosis and detection of ARVC. The most common manifestations were abnormal structure and function of the right ventricle and abnormal ECG of repolarization and ventricular arrhythmia which originates from the right ventricle.
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Affiliation(s)
- Q Shan
- Department of Cardiology, First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, China
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Shan Q, Haddrill JL, Lynch JW. A single beta subunit M2 domain residue controls the picrotoxin sensitivity of alphabeta heteromeric glycine receptor chloride channels. J Neurochem 2001; 76:1109-20. [PMID: 11181831 DOI: 10.1046/j.1471-4159.2001.00124.x] [Citation(s) in RCA: 67] [Impact Index Per Article: 2.9] [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: 11/20/2022]
Abstract
This study investigated the residues responsible for the reduced picrotoxin sensitivity of the alphabeta heteromeric glycine receptor relative to the alpha homomeric receptor. By analogy with structurally related receptors, the beta subunit M2 domain residues P278 and F282 were considered the most likely candidates for mediating this effect. These residues align with G254 and T258 of the alpha subunit. The T258A, T258C and T258F mutations dramatically reduced the picrotoxin sensitivity of the alpha homomeric receptor. Furthermore, the converse F282T mutation in the beta subunit increased the picrotoxin sensitivity of the alphabeta heteromeric receptor. The P278G mutation in the beta subunit did not affect the picrotoxin sensitivity of the alphabeta heteromer. Thus, a ring of five threonines at the M2 domain depth corresponding to alpha subunit T258 is specifically required for picrotoxin sensitivity. Mutations to alpha subunit T258 also profoundly influenced the apparent glycine affinity. A substituted cysteine accessibility analysis revealed that the T258C sidechain increases its pore exposure in the channel open state. This provides further evidence for an allosteric mechanism of picrotoxin inhibition, but renders it unlikely that picrotoxin (as an allosterically acting 'competitive' antagonist) binds to this residue.
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MESH Headings
- Allosteric Regulation/genetics
- Amino Acid Substitution/genetics
- Binding Sites/drug effects
- Binding Sites/genetics
- Binding, Competitive/drug effects
- Binding, Competitive/genetics
- Cell Line
- Chloride Channels/antagonists & inhibitors
- Chloride Channels/genetics
- Chloride Channels/metabolism
- Dose-Response Relationship, Drug
- Glycine/metabolism
- Glycine/pharmacology
- Humans
- Kidney/cytology
- Kidney/drug effects
- Kidney/metabolism
- Mesylates/pharmacology
- Mutagenesis, Site-Directed
- Picrotoxin/pharmacology
- Protein Structure, Tertiary/drug effects
- Protein Structure, Tertiary/genetics
- Protein Subunits
- Receptors, Glycine/antagonists & inhibitors
- Receptors, Glycine/genetics
- Receptors, Glycine/metabolism
- Sequence Homology, Amino Acid
- Sulfhydryl Reagents/pharmacology
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Affiliation(s)
- Q Shan
- Department of Physiology and Pharmacology, University of Queensland, Brisbane, Queensland, Australia
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Abstract
In the present study, intraperitoneal injection of lipopolysaccharide (10 mg/kg) to anaesthetized rats produced a gradual fall in mean arterial pressure in 6 h. Aortic rings from lipopolysaccharide-treated rats showed a significant reduction in the contractile response to vasoconstrictors. Pretreatment with N(G)-nitro-L-arginine methyl ester (L-NAME) or aminoguanidine, two nitric oxide synthase (NOS) inhibitors, abolished this vascular hyporeactivity. In ventricular myocytes isolated from lipopolysaccharide-treated rats, both electrically induced Ca(2+) transients and the intracellular Ca(2+) response to beta-adrenergic stimulation were significantly depressed when compared with those recorded from myocytes from sham control rats. L-NAME and aminoguanidine alone had no effects on electrically stimulated Ca(2+) transients in ventricular myocytes either from control or lipopolysaccharide-treated rats. However, these two NOS inhibitors augmented the intracellular Ca(2+) response to beta-adrenergic stimulation in myocytes from lipopolysaccharide-treated rats, but not in control myocytes. In addition, 1H-[1,2,4]oxadiazolo[4, 3-a]quinoxalin-1-one (ODQ), an inhibitor of nitric oxide (NO)-sensitive guanylyl cyclase, also reversed the intracellular Ca(2+) hyporesponsiveness to beta-adrenergic stimulation in myocytes from lipopolysaccharide-treated rats. In cardiac myocytes from lipopolysaccharide-rats pretreated with aminoguanidine, the intracellular Ca(2+) hyporesponsiveness to beta-adrenergic stimulation was abolished. However, there still existed a depressed Ca(2+) response to electrical field stimulation. These data indicate that NO following lipopolysaccharide stimulation contributes to vascular hyporeactivity and the depressed intracellular Ca(2+) response to beta-adrenergic stimulation in lipopolysaccharide-treated rats, but is not responsible for the reduced Ca(2+) response to electrical stimulation in our experimental conditions.
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Affiliation(s)
- Q Shan
- Department of Physiology, Institute of Cardiovascular Sciences and Medicine, The University of Hong Kong, 5 Sassoon Road, SAR, Hong Kong, People's Republic of China.
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Chen M, Cao K, Shan Q, Zou J, Li W, Liao M, Huang Y. [Automatic modulation of refractoriness of His-Purkinje system during atrioventricular nodal reentrant tachycardia]. Chin Med J (Engl) 2000; 113:490-2. [PMID: 11775863] [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: 02/23/2023] Open
Abstract
OBJECTIVE To illustrate the automatic modulation of refractoriness of His-Purkinje system during atrioventricular nodal reentrant tachycardia (AVNRT) and to discuss the possible mechanisms. METHODS Programmed electrical stimulations were performed in high right atrium (HRA) in 8 patients with AVNRT before ablation to induce tachycardia and electrocardiagraphic recordings were done synchronically when AVNRT appeared. RESULTS All the patients had 2:1 atrioventricular (A-V) conduction when AVNRT began, 2 of whom were blocked below His bundle, 5 above His bundle and 1 unclear. After a duration of 14.03 +/- 10.03 s of 2:1 A-V conduction, 1:1 A-V conduction with bundle banch block appeared, 3 of which were right bundle branch block (RBBB), 3 left bundle branch block (LBBB), and 2 with both. Bundle branch block disappeared after a duration of 6.87 +/- 11.26 s. CONCLUSION Effective refractory period (ERP) of His-Purkinje system at the beginning of AVNRT was modulated automatically within less than 30-60 s and thus facilitated nodal-ventricular conduction. The mechanism of this is electrical remodeling.
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Affiliation(s)
- M Chen
- Department of Cardiology, First Affiliated Hospital, Nanjing Medical University, Nanjing 210029, China
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Feig BW, Lu X, Hunt KK, Shan Q, Yu D, Pollock R, Chiao P. Inhibition of the transcription factor nuclear factor-kappa B by adenoviral-mediated expression of I kappa B alpha M results in tumor cell death. Surgery 1999; 126:399-405. [PMID: 10455913] [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: 02/13/2023]
Abstract
BACKGROUND The activation of transcription factor nuclear factor-kappa B (NF-kappa B) by extracellular stimuli has been shown to protect cells from apoptotic cell death. Inhibition of NF-kappa B activity should result in increased tumor cell killing in response to apoptotic stimuli. This study evaluated the effect of inhibition of NF-kappa B on a series of sarcoma and normal cell lines. METHODS Human sarcoma cell lines (HT1080, SKLMS-1, and MFH) and normal cell lines (NLF and BSMC) were infected with an adenoviral dominant-negative mutant Ad5I kappa B alpha M in vitro. Control cells were infected with the empty adenoviral vector and mock-infected with media alone. Viable cell counts were determined by microscopic evaluation on days 1 to 6 after infection. Cell proliferation was determined at 48 hours by MTT (1-[4,5-dimethylthiazol-2-yl]-3,5-dephenylformazan) assay. RESULTS All cell lines showed evidence of successful adenoviral infection as evidenced by the infection of all cell lines with the adenoviral marker gene Ad5 LacZ. All the tumor cells were found to have a significant decrease in cell viability and proliferation after treatment with the Ad5I kappa B alpha M gene compared with both mock-infected cells and cells infected with empty vector (P < .0001). The normal cell lines, although able to be successfully infected, did not show a significant decrease in cell viability or proliferation with adenoviral-mediated I kappa B alpha M infection. CONCLUSIONS Inhibition of NF-kappa B through adenoviral-mediated infection of the dominant-negative inhibitor I kappa B alpha M resulted in a significant decrease in tumor cell viability and proliferation while having no deleterious effect on normal cell lines. The Ad5I kappa B alpha M gene therefore could be potentially used as a clinical treatment for patients with soft-tissue sarcoma.
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Affiliation(s)
- B W Feig
- Department of Surgical Oncology, M.D. Anderson Cancer Center, Houston, Tex. 77030, USA
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Zhang D, Jin S, Shan Q, Sun G, Fan J, Ding N. [The relationship of lung function and heart function of RHD patients in different period]. Zhonghua Wai Ke Za Zhi 1999; 37:286-8. [PMID: 11829841] [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: 02/23/2023]
Abstract
OBJECTIVE To investigate the relationship of heart function and lung function in RHD patients. METHODS We compared heart posterior-anterior film, lung function test results, PaO(2) and O(2) Sat of blood gas analysis before and after motion before operation, early postoperation, late postoperation, according to heart function and cardiothoracic ratio in 98 RHD patients. RESULTS With worsening of heart function and enlargement of cardiothoracic ratio, lung function worsened too. PaO(2) and O(2) Sat did not change apparently. The lung function of early postoperation did not improve significantly. The lung function improved gradually with better heart function and shortening of heart in later postoperation. But small air way obstruction and diffuse function and function residue volume changed slowly. CONCLUSIONS Heart function affects the lung function directly. They were positively correlated.
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Affiliation(s)
- D Zhang
- Qingdao Institute of Thoracic and Cardiovascular Surgery, Qingdao 266100
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Zhang S, Ye X, Shan Q, Zhang W, Ye L, Cui Y. Effects of acupuncture on the levels of endothelin, TXB2, and 6-keto-PGF1 alpha in apoplexy patients. J TRADIT CHIN MED 1999; 19:39-43. [PMID: 10453582] [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: 02/13/2023]
Abstract
In order to delve into the mechanism governing the treatment of apoplexy by acupuncture at yangming channel points as main points, we observed the changes in the endothelin (ET) level in plasma, TXB2 and 6-Keto-PGF1 alpha levels in urine in convalescent apoplexy patients during acupuncture treatment. The results showed that the ET level in plasma in convalescent apoplexy patients was significantly higher than that in healthy subjects (P < 0.05), and the ET level in plasma in patients was decreased after one course of acupuncture treatment. It was found that before treatment the TXB2 level in urine in apoplexy patients was significantly higher than in healthy subjects, and the 6-Keto-PGF1 alpha level in urine in the patients was significantly lower than that in healthy subjects, with an increased ratio of TXB2 to 6-Keto-PGF1 alpha. After acupuncture treatment, the TXB2 level in urine was lowered with a decrease in the ratio of TXB2 to 6-Keto-PGF1 alpha. All this indicated that one of the mechanisms governing acupuncture treatment of apoplexy acupuncture at yangming channel points as main points was that acupuncture could produce therapeutic effects by adjusting the imbalance of important vaso-active substances, ET, TXA2, and PGI2.
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Affiliation(s)
- S Zhang
- Shandong University of Traditional Chinese Medicine and Pharmacy, Jinan
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Zhan B, Hawdon J, Shan Q, Ren H, Qiang H, Gong X, Xiao S, Hotez P. Screening and sequential comparison of Ancylostoma-secreted protein 1 and 2 (ASP1, ASP2) genes from different species of hookworm. Parasitol Int 1998. [DOI: 10.1016/s1383-5769(98)80563-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Abstract
RecA protein will bind to a gapped duplex DNA molecule and promote a DNA strand exchange with a second homologous linear duplex. A double-strand break in the second duplex is efficiently bypassed in the course of these reactions. We demonstrate that the bypass of double-strand breaks is not explained by a mechanism involving homologous interactions between two duplex DNA molecules, but instead requires the ATP-mediated generation of DNA torsional stress brought about by the action of RecA. The results suggest new pathways for the repair of double-strand breaks and underline the need for new paradigms to explain the alignment of homologous DNAs during genetic recombination.
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Affiliation(s)
- Q Shan
- Department of Biochemistry, University of Wisconsin, Madison 53706, USA
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40
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Abstract
ATP hydrolysis (by RecA protein) fundamentally alters the properties of RecA protein-mediated DNA strand exchange reactions. ATP hydrolysis renders DNA strand exchange unidirectional, greatly increases the lengths of hybrid DNA created, permits the bypass of heterologous DNA insertions in one or both DNA substrates, and is absolutely required for exchange reactions involving four DNA strands. There are at least two viable models to explain how ATP hydrolysis is coupled to DNA strand exchange so as to bring about these effects. The first couples ATP hydrolysis to a redistribution of RecA monomers within a RecA filament. The second couples ATP hydrolysis to a facilitated rotation of the DNA substrates. The RecA monomer redistribution model makes the prediction that heterology bypass should not occur if the single-stranded DNA substrate is linear. The facilitated DNA rotation model predicts that RecA protein should promote the separation of paired DNA strands within a RecA filament if one of them is contiguous with a length of DNA being rotated about the filament exterior. Here, a facile bypass of heterologous insertions with linear DNA substrates is demonstrated, providing evidence against a role for RecA monomer redistribution in heterology bypass. In addition, we demonstrate that following a four-strand DNA exchange reaction, a distal segment of DNA hundreds of base pairs in length can be unwound in a nonreciprocal phase of the reaction, consistent with the direct coupling of an ATP hydrolytic motor to the proposed DNA rotation.
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Affiliation(s)
- K J MacFarland
- Department of Biochemistry, College of Agriculture and Life Sciences, University of Wisconsin, Madison, Wisconsin 53706, USA
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41
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Abstract
The role of ATP hydrolysis in RecA protein-mediated DNA strand exchange reactions remains controversial. Competing models suggest that ATP hydrolysis is coupled either to a simple redistribution of RecA monomers within a filament to repair filament discontinuities, or more directly to rotation of the DNA substrates to drive branch movement unidirectionally. Here, we test key predictions of the RecA redistribution idea. When ATP is hydrolyzed, DNA strand exchange is accompanied by a RecA exchange reaction, between free and bound RecA protomers in the interior of RecA filaments, that meets a central prediction of the model. The RecA protomer exchange is not required for, and does not occur during, the "search for homology" in which the single-stranded DNA within a RecA-ssDNA nucleoprotein filament is homologously aligned with the duplex DNA. Instead, the RecA exchange is triggered by the completion of strand exchange (a strand switch to generate a hybrid DNA product) in any given segment of the filament. In effect, formation of hybrid DNA leads to a change in filament conformation to one with properties approximating those of RecA filaments bound to double-stranded DNA. Addition of the RecA K72R mutant protein to a reaction with the wild type protein leads to the formation of mixed filaments and a poisoning of the DNA strand exchange reaction. Under some conditions, a facile RecA protomer exchange is observed, and significant ATP is hydrolyzed, even though DNA strand exchange is entirely blocked by the mutant protein. A redistribution of RecA protomers coupled to ATP hydrolysis is not sufficient in itself to explain how ATP hydrolysis facilitates DNA strand exchange. A RecA protomer exchange may nevertheless play an important role in the DNA strand exchange process.
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Affiliation(s)
- Q Shan
- Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
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Shan Q, Bork JM, Webb BL, Inman RB, Cox MM. RecA protein filaments: end-dependent dissociation from ssDNA and stabilization by RecO and RecR proteins. J Mol Biol 1997; 265:519-40. [PMID: 9048946 DOI: 10.1006/jmbi.1996.0748] [Citation(s) in RCA: 166] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
RecA protein filaments formed on circular (ssDNA) in the presence of ssDNA binding protein (SSB) are generally stable as long as ATP is regenerated. On linear ssDNA, stable RecA filaments are believed to be formed by nucleation at random sites on the DNA followed by filament extension in the 5' to 3' direction. This view must now be enlarged as we demonstrate that RecA filaments formed on linear ssDNA are subject to a previously undetected end-dependent disassembly process. RecA protein slowly dissociates from one filament end and is replaced by SSB. The results are most consistent with disassembly from the filament end nearest the 5' end of the DNA. The bound SSB prevents re-formation of the RecA filaments, rendering the dissociation largely irreversible. The dissociation requires ATP hydrolysis. Disassembly is not observed when the pH is lowered to 6.3 or when dATP replaces ATP. Disassembly is not observed even with ATP when both the RecO and RecR proteins are present in the initial reaction mixture. When the RecO and RecR proteins are added after most of the RecA protein has already dissociated, RecA protein filaments re-form after a short lag. The newly formed filaments contain an amount of RecA protein and exhibit an ATP hydrolysis rate comparable to that observed when the RecO and RecR proteins are included in the initial reaction mixture. The RecO and RecR proteins thereby stabilize RecA filaments even at the 5' ends of ssDNA, a fact which should affect the recombination potential of 5' ends relative to 3' ends. The location and length of RecA filaments involved in recombinational DNA repair is dictated by both the assembly and disassembly processes, as well as by the presence or absence of a variety of other proteins that can modulate either process.
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Affiliation(s)
- Q Shan
- Department of Biochemistry, University of Wisconsin-Madison 53706, USA
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Abstract
A model is presented describing the thermoelastic photoacoustic interaction in a layered medium within a transparent fluid, where a polymer transducer is used for the detection of ultrasonic pulses. By taking the optical absorption coefficient and finite layer thickness into account, the amplitude and shape of photoacoustic transients are calculated for both forward and backward travelling directions. Additionally, photoacoustic transient interaction with the PVDF transducer has been characterised using a discrete-time algorithm for the transducer response. Good agreement with experimental waveforms are demonstrated, so that this may form the basis of system characterisation when miniature laser-ultrasound probes are used in various applications.
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Affiliation(s)
- Q Shan
- University of Manchester Institute of Science and Technology, DIAS, UMIST, UK.
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44
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Abstract
We characterize aspects of the conformation and dynamic state of RecA filaments when bound to dsDNA that are specifically linked to the presence of the second of the two bound DNA strands. Filaments bound to dsDNA exhibit a facile exchange between free and bound RecA monomers or oligomers in the filament interior that is not seen on ssDNA. The RecA mutant K72R, which binds but does not hydrolyze ATP, forms mixed filaments with wild type RecA protein under some conditions. In the presence of dATP, mixed filaments are formed on dsDNA or ssDNA in which the RecA K72R content approximately reflects the proportion of the K72R mutant in the total RecA protein present when the filament is formed. In the presence of ATP, mixed filaments are formed on dsDNA, but the mutant protein strongly inhibits the binding of wtRecA protein to single-stranded DNA. When RecA K72R is added to pre-formed filaments containing only wild-type RecA protein on single-stranded DNA, little of the mutant protein exchanges into the filament. Exchange occurs readily, however, when the filament is bound to double-stranded DNA. The presence of a second DNA strand in RecA-dsDNA filaments produces as altered and more dynamic filament state relative to filaments formed on single-stranded DNA. The results point to a substantial alteration in filament state when synapsis occurs during RecA protein-mediated DNA strand exchange.
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Affiliation(s)
- Q Shan
- Department of Biochemistry, University of Wisconsin-Madison, 53706, USA
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Abstract
Replacement of lysine 72 in RecA protein with arginine produces a mutant protein that binds but does not hydrolyze ATP. The protein nevertheless promotes DNA strand exchange (Rehrauer, W. M., and Kowalczykowski, S. C. (1993) J. Biol. Chem. 268, 1292-1297). With RecA K72R protein, the formation of the hybrid DNA product of strand exchange is greatly affected by the concentration of Mg2+ in ways that reflect the concentration of a Mg.dATP complex. When Mg2+ is present at concentrations just sufficient to form the Mg.dATP complex, substantial generation of completed product hybrid DNAs over 7 kilobase pairs in length is observed (albeit slowly). Higher levels of Mg2+ are required for optimal uptake of substrate duplex DNA into the nucleoprotein filament, indicating that the formation of joint molecules is facilitated by Mg2+ levels that inhibit the subsequent migration of a DNA branch. We also show that the strand exchange reaction promoted by RecA K72R, regardless of the Mg2+ concentration, is bidirectional and incapable of bypassing structural barriers in the DNA or accommodating four DNA strands. The reaction exhibits the same limitations as that promoted by wild type RecA protein in the presence of adenosine 5'-O-(3-thio)triphosphate. The Mg2+ effects, the limitations of RecA-mediated DNA strand exchange in the absence of ATP hydrolysis, and unusual DNA structures observed by electron microscopy in some experiments, are interpreted in the context of a model in which a fast phase of DNA strand exchange produces a discontinuous three-stranded DNA pairing intermediate, followed by a slow phase in which the discontinuities are resolved. The mutant protein also facilitates the autocatalytic cleavage of the LexA repressor, but at a reduced rate.
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Affiliation(s)
- Q Shan
- Department of Biochemistry, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA
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Xu J, Sun C, Wu K, Shao J, Shan Q, Cong J, Zhang J. Election spin resonance studies of free radical formation and oxygen consumption of lens epithelium during ultraviolet exposure. Yan Ke Xue Bao 1993; 9:15-8. [PMID: 8253176] [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: 01/29/2023]
Abstract
A long life election spin resonance (ESR) signal at g = 2.0006 was observed in the normal lens epithelium and cortical fibers. During ultraviolet (UV) exposure, a new ESR signal at g = 2.0060 was found in the lens epithelium. But this specific signal was not detected in the lens cortical fibers. This suggested that lens epithelial cells were more susceptible to the free radical formation which was induced by UV light. By means of ESR spin probe oximetry, the oxygen uptake of lens epithelial cells was measured. The more the oxygen uptake, the higher the K value was. The K value of the oxygen consumption of epithelial cell linearly correlated with time of consumption (20-60 min) and increased as a function of UV exposure time (1-5 min). The oxygen consumption rate of lens epithelial cell was approximately 1.38 x 10(6) and increased to 7.1 x 10(6) O2 molecules per cell per sec. The oxygen consumption rate increased more than 5 times. These results indicates that UV light can accelerate the respiratory function of lens epithelial cells. The necessity of excess oxygen of lens epithelial cells may play a role in the cataract formation induced by UV light.
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Affiliation(s)
- J Xu
- Beijing Institute of Radiation Medicine, China
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