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Xu JJ, Shi C, Hong XQ, Chu F, Bai QK, Wang J, Shi YM, Guo ZX, Zhang XR, Wang FC, Zhang M, Chang XT, Zhang XC, Zhong YW. [Study of the predictive role of serum HBV RNA on HBeAg serological conversion in children with chronic hepatitis B]. Zhonghua Gan Zang Bing Za Zhi 2023; 31:1182-1186. [PMID: 38238952 DOI: 10.3760/cma.j.cn501113-20220121-00038] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/23/2024]
Abstract
Objective: To investigate the role of serum hepatitis B virus RNA (HBV RNA) in predicting HBeAg serological conversion in children with chronic hepatitis B. Methods: 175 children aged 1~17 years with chronic hepatitis B who received interferon α (IFNα) for 48 weeks were selected. Patients were divided into HBeAg seroconversion and non-conversion based on whether HBeAg seroconversion occurred at 48 weeks of treatment.T-test and Mann-Whitney U test were used to compare between groups; chisquare test or Fisher exact probability method was used to compare the frequency between groups of classified variables; and Pearson correlation was used to analyze the correlation between indicators. Univariate and multivariate logistic regression analyses were used to identify influencing factors associated with HBeAg serological conversion. The predictive effect of HBV RNA, HBV DNA, and HBsAg on HBeAg serological conversion was compared and analyzed by the receiver operating characteristic curve (ROC). Results: The seroconversion rate of HBeAg at 48 weeks was 36.0% (63/175). The reduction in HBVRNA levels from baseline to the 12th, 24th, 36th, and 48th weeks of antiviral therapy was significantly greater in the HBeAg serological conversion group than that in the non-conversion group, and the difference was statistically significant between the two groups (P < 0.05). Univariate and multivariate regression analyses showed that age and a decline in HBV RNA levels at week 12 were independent predictors of HBeAg serological conversion. The area under the ROC curve (AUROC) of HBV RNA decline at week 12 was 0.677(95% CI∶0.549-0.806, P = 0.012), which was significantly better than the same period of AUROC of HBV DNA (0.657, 95% CI∶0.527-0.788, P = 0.025) and HBsAg (0.660, 95% CI∶0.526-0.795, P = 0.023) decline. HBV RNA levels decreased (>1.385 log10 copies/ml) at week 12, with a positive predictive value of 53.2%, a negative predictive value of 72.2%, a sensitivity of 77.4%, and a specificity of 57.9% for HBeAg seroconversion. Conclusion: HBV RNA level lowering during the 12th week of antiviral therapy can serve as an early predictor marker for HBeAg serological conversion in children with chronic hepatitis B.
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Affiliation(s)
- J J Xu
- Hebei North University, Zhangjiakou 075000, China the Fifth Medical Center of Chinese PLA General Hospital, Beijing 100039, China
| | - C Shi
- the Fifth Medical Center of Chinese PLA General Hospital, Beijing 100039, China
| | - X Q Hong
- Hebei North University, Zhangjiakou 075000, China the Fifth Medical Center of Chinese PLA General Hospital, Beijing 100039, China
| | - F Chu
- the Fifth Medical Center of Chinese PLA General Hospital, Beijing 100039, China
| | - Q K Bai
- Hebei North University, Zhangjiakou 075000, China
| | - J Wang
- Hebei North University, Zhangjiakou 075000, China
| | - Y M Shi
- The First Affiliated Hospital of Henan University of Chinese Medicine, Zhengzhou 450000, China
| | - Z X Guo
- Hebei North University, Zhangjiakou 075000, China
| | - X R Zhang
- Hebei North University, Zhangjiakou 075000, China
| | - F C Wang
- the Fifth Medical Center of Chinese PLA General Hospital, Beijing 100039, China
| | - M Zhang
- the Fifth Medical Center of Chinese PLA General Hospital, Beijing 100039, China
| | - X T Chang
- Hebei North University, Zhangjiakou 075000, China
| | - X C Zhang
- Hebei North University, Zhangjiakou 075000, China
| | - Y W Zhong
- the Fifth Medical Center of Chinese PLA General Hospital, Beijing 100039, China
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Guo ZX, Zhao XL, Zhao ZY, Zhu QY, Wang ZY, Xu M. Malignant melanoma resection and reconstruction with the first manifestation of lumbar metastasis: A case report. World J Clin Cases 2023; 11:3571-3577. [PMID: 37383908 PMCID: PMC10294206 DOI: 10.12998/wjcc.v11.i15.3571] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/24/2022] [Revised: 03/05/2023] [Accepted: 04/19/2023] [Indexed: 05/25/2023] Open
Abstract
BACKGROUND Malignant melanoma (MM) has shown an increasing incidence worldwide, and a potential to metastasize to almost any part of the body. Clinically, MM with bone metastasis as the initial manifestation is extremely rare. Spinal metastatic MM can cause spinal cord or nerve root compression, resulting in severe pain and paralysis. Currently, the primary clinical treatments for MM are surgical resection in conjunction with chemotherapy, radiotherapy, and immunotherapy.
CASE SUMMARY Here, we report the case of a 52-year-old male who presented to the clinic with progressive low back pain and limited nerve function. No primary lesion or spinal cord compression was detected from computed tomography and magnetic resonance imaging of the lumbar vertebrae and positron emission tomography scan. A lumbar puncture biopsy confirmed the diagnosis of lumbar spine metastatic MM. Following surgical resection, the patient’s quality of life improved, symptoms were relieved, and comprehensive treatment was initiated, which prevented recurrence.
CONCLUSION Spinal metastatic MM is clinically rare, and may cause neurological symptoms, including paraplegia. Currently, the clinical treatment plan consists of surgical resection in combination with chemotherapy, radiotherapy, and immunotherapy.
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Affiliation(s)
- Zi-Xuan Guo
- Graduate School, Medical School of Chinese PLA, Beijing 100853, China
| | - Xue-Lin Zhao
- Graduate School, Medical School of Chinese PLA, Beijing 100853, China
| | - Zi-Yi Zhao
- Graduate School, Medical School of Chinese PLA, Beijing 100853, China
| | - Qing-Yan Zhu
- Graduate School, Medical School of Chinese PLA, Beijing 100853, China
| | - Zi-Ying Wang
- Graduate School, Medical School of Chinese PLA, Beijing 100853, China
| | - Meng Xu
- Department of Orthopedics, The Forth Medical Center of PLA General Hospital, Beijing 100037, China
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3
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Guo ZX, Wu YE, Shi HY, van den Anker J, Liang P, Zheng Y, Zhao XW, Feng R, Zhao W. A liquid chromatography-tandem mass spectrometry method for simultaneous quantification of thirty-nine tyrosine kinase inhibitors in human plasma. J Pharm Biomed Anal 2023; 224:115159. [PMID: 36442459 DOI: 10.1016/j.jpba.2022.115159] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2022] [Revised: 10/26/2022] [Accepted: 11/09/2022] [Indexed: 11/23/2022]
Abstract
Currently, the use of targeted drugs such as tyrosine kinase inhibitors (TKIs) plays an important role in clinical therapy. As the number of approved TKIs continues to increase, existing analysis methods will not be able to meet the growing needs, and will hamper the development of therapeutic drug monitoring (TDM) of TKIs. Based on LC-MS/MS technology, this study tends to develop and validate a multi-component analysis method for simultaneous determination of the concentrations of 39 TKIs in plasma. Spiked plasma was blended with isotope labelled internal standards, and injected into the LC-MS/MS system after protein precipitation by acetonitrile. Chromatographic separation was achieved using an ODS-4 column with gradient elution of formic acid/water (1:1000; v/v) and acetonitrile. Analytes detection was conducted in positive ionisation mode using MRM. The total run time was 8 min. The method validation was conducted by assessing the following parameters: selectivity, linearity and the lower limit of qualification, accuracy and precision, stability, matrix effect and recovery. The concentrations of 39 TKIs showed good linearity within the range of their respective standard curves in plasma, the accuracy of all quality control samples ranged from 85.9% to 114.1%, and the precision was lower than 13.3%. The extraction recovery ranged from 92.6% to 114.7%, and the matrix effect of plasma was lower than 11.3%. This new method was successfully developed, can be used for the determination of drug concentrations in multiple patients with different kinds of TKIs, and will therefore be suitable for TDM of 39 TKIs.
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Affiliation(s)
- Zi-Xuan Guo
- Department of Clinical Pharmacy, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China; Department of Pharmacy, China-Japan Friendship Hospital, Beijing, China
| | - Yue-E Wu
- Department of Clinical Pharmacy, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Hai-Yan Shi
- Department of Clinical Pharmacy, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Engineering and Technology Research Center for Pediatric Drug Development, Shandong Medicine and Health Key Laboratory of Clinical Pharmacy, Jinan, China
| | - John van den Anker
- Division of Clinical Pharmacology, Children's National Hospital, Washington DC, USA; Departments of Pediatrics, Pharmacology & Physiology, Genomics & Precision Medicine, the George Washington University School of Medicine and Health Sciences, Washington DC, USA; Department of Paediatric Pharmacology and Pharmacometrics, University of Basel Children's Hospital, Basel, Switzerland
| | - Ping Liang
- Department of Pharmacy, Fourth Hospital of Hebei Medical University, Shijiazhuang, China
| | - Ying Zheng
- Department of Pharmacy, Fourth Hospital of Hebei Medical University, Shijiazhuang, China
| | - Xue-Wei Zhao
- Department of Pharmacy, Fourth Hospital of Hebei Medical University, Shijiazhuang, China
| | - Rui Feng
- Department of Pharmacy, Fourth Hospital of Hebei Medical University, Shijiazhuang, China.
| | - Wei Zhao
- Department of Clinical Pharmacy, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China; NMPA Key Laboratory for Clinical Research and Evaluation of Innovative Drug, Qilu Hospital of Shandong University, Shandong University, Jinan, China.
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4
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Yang XM, Ye PP, Liu XL, Guo ZX, Kan M, Li Q, Song LL, Liu HY, Chen KG, Shi JY, Zhang YH, Li Y, Zhao FR, van den Anker J, Li Y, Zhao W. Population pharmacokinetics and pharmacogenetics of apatinib in adult cancer patients. Br J Clin Pharmacol 2023; 89:1862-1872. [PMID: 36662574 DOI: 10.1111/bcp.15665] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 01/07/2023] [Accepted: 01/09/2023] [Indexed: 01/21/2023] Open
Abstract
AIMS Apatinib is widely used in Chinese cancer patients. As the in vivo drug disposition of apatinib has large individual differences, adverse events are prone to occur. Cytochrome P450 (CYP)3A5 and cancer types maybe the main factors affecting this individual differences. The objective of our study was to establish a population pharmacokinetics (PK) model of apatinib in adult cancer patients, and to explore optimal dosage regimens for individualized treatment. METHODS Adult patients with various types of cancer treated with apatinib were enrolled. The concentration of apatinib in plasma was determined by high-performance liquid chromatography-tandem mass spectrometry. CYP3A5 genotype was determined using TaqMan allelic discrimination technique. The population PK model was developed by NONMEM V7.4. The dosing regimen was optimized based on Monte Carlo simulations. RESULTS A population PK model of apatinib in adult cancer patient was established. CYP3A5 genotype and systemic cancer type (digestive system cancers, nondigestive system cancers) were the most significant covariates for PK parameters. Patients with CYP3A5*1 expressers (CYP3A5*1/*1 and CYP3A5*1/*3) had lower apparent clearance and apparent volume of distribution than patients who do not express CYP3A5*1 (CYP3A5*3/*3). Patients with nondigestive system cancer had higher apparent volume of distribution and absorption rate constant than digestive system cancer. The results of dose simulation suggest that the apatinib dose in patients who do not express CYP3A5*1 should be 33.33-50.00% higher than that in CYP3A5*1 expressers. CONCLUSIONS A population PK model of apatinib in adult cancer patients was established. CYP3A5 genotype and systemic cancer type had concurrent effects on PK parameters. CYP3A5 patients who do not express CYP3A5*1 required higher doses.
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Affiliation(s)
- Xin-Mei Yang
- Department of Clinical Pharmacy, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Engineering and Technology Research Center for Pediatric Drug Development, Shandong Medicine and Health Key Laboratory of Clinical Pharmacy, Jinan, China
| | - Pan-Pan Ye
- Department of Clinical Pharmacy, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Engineering and Technology Research Center for Pediatric Drug Development, Shandong Medicine and Health Key Laboratory of Clinical Pharmacy, Jinan, China
| | - Xiao-Lin Liu
- Department of Oncology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Key Laboratory of Rheumatic Disease and Translational Medicine, Shandong Lung Cancer Institute, Jinan, China
| | - Zi-Xuan Guo
- Department of Pharmacy, China - Japan Friendship Hospital, Beijing, China
| | - Min Kan
- Department of Clinical Pharmacy, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Qian Li
- Department of Clinical Pharmacy, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Engineering and Technology Research Center for Pediatric Drug Development, Shandong Medicine and Health Key Laboratory of Clinical Pharmacy, Jinan, China
| | - Lin-Lin Song
- Department of Clinical Pharmacy, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Engineering and Technology Research Center for Pediatric Drug Development, Shandong Medicine and Health Key Laboratory of Clinical Pharmacy, Jinan, China
| | - Hong-Ying Liu
- Department of Clinical Pharmacy, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Engineering and Technology Research Center for Pediatric Drug Development, Shandong Medicine and Health Key Laboratory of Clinical Pharmacy, Jinan, China
| | - Ke-Guang Chen
- Department of Clinical Pharmacy, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Engineering and Technology Research Center for Pediatric Drug Development, Shandong Medicine and Health Key Laboratory of Clinical Pharmacy, Jinan, China
| | - Jin-Yi Shi
- Department of Clinical Pharmacy, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Engineering and Technology Research Center for Pediatric Drug Development, Shandong Medicine and Health Key Laboratory of Clinical Pharmacy, Jinan, China
| | - Ye-Hui Zhang
- Department of Clinical Pharmacy, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Engineering and Technology Research Center for Pediatric Drug Development, Shandong Medicine and Health Key Laboratory of Clinical Pharmacy, Jinan, China
| | - Ya Li
- Department of Clinical Pharmacy, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Engineering and Technology Research Center for Pediatric Drug Development, Shandong Medicine and Health Key Laboratory of Clinical Pharmacy, Jinan, China
| | - Fu-Rong Zhao
- Department of Clinical Pharmacy, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Engineering and Technology Research Center for Pediatric Drug Development, Shandong Medicine and Health Key Laboratory of Clinical Pharmacy, Jinan, China
| | - John van den Anker
- Division of Clinical Pharmacology, Children's National Hospital, Washington, DC, USA.,Departments of Pediatrics, Pharmacology & Physiology, Genomics & Precision Medicine, George Washington University, School of Medicine and Health Sciences, Washington, DC, USA.,Department of Paediatric Pharmacology and Pharmacometrics, University Children's Hospital Basel, University of Basel, Basel, Switzerland
| | - Yan Li
- Department of Oncology, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Key Laboratory of Rheumatic Disease and Translational Medicine, Shandong Lung Cancer Institute, Jinan, China
| | - Wei Zhao
- Department of Clinical Pharmacy, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Engineering and Technology Research Center for Pediatric Drug Development, Shandong Medicine and Health Key Laboratory of Clinical Pharmacy, Jinan, China.,Department of Clinical Pharmacy, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
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5
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Li J, Liu YX, Lü PP, Wang YL, Li ZF, Zhang Y, Gan HY, Li XC, Mandal D, Cai J, Guo ZX, Yao H, Guo LD. Community Assembly of Fungi and Bacteria along Soil-Plant Continuum Differs in a Zoige Wetland. Microbiol Spectr 2022; 10:e0226022. [PMID: 36135597 PMCID: PMC9604091 DOI: 10.1128/spectrum.02260-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2022] [Accepted: 08/28/2022] [Indexed: 01/04/2023] Open
Abstract
Distinct plant associated microbiomes live in rhizosphere soil, roots, and leaves. However, the differences in community assembly of fungi and bacteria along soil-plant continuum are less documented in ecosystems. We examined fungal and bacterial communities associated with leaves, roots, and rhizosphere soil of the dominant arbuscular mycorrhizal (AM) plants Taraxacum mongolicum and Elymus nutans and non-AM plant Carex enervis in the Zoige Wetland by using high throughput sequencing techniques. The operational taxonomic unit (OTU) richness of fungi and bacteria was significantly higher in rhizosphere soil than in roots and leaves, and their community compositions were significantly different in the rhizosphere soil, roots, and leaves in each plant species. The co-occurrence network analysis revealed that the sensitive fungal and bacterial OTUs with various taxonomic positions were mainly clustered into different modules according to rhizosphere soil, roots, and leaves in each plant species. Along the soil-plant continuum, the rhizosphere soil pool contributed more source on bacterial than on fungal communities in roots and leaves of the three plant species, and more source on bacterial and fungal communities in leaves of T. mongolicum and E. nutans compared with C. enervis. Furthermore, the root pool contributed more source on bacterial than on fungal communities in leaves of T. mongolicum and E. nutans but not that of C. enervis. This study highlights that the host plant selection intensity is higher in fungal than in bacterial communities in roots and leaves from rhizosphere soil in each plant species, and differs in fungal and bacterial communities along the soil-plant continuum in AM plants T. mongolicum and E. nutans and non-AM plant C. enervis in the Zoige Wetland. IMPORTANCE Elucidating the community microbiome assemblage alone the soil-plant continuum will help to better understand the biodiversity maintenance and ecosystem functioning. Here, we examined the fungal and bacterial communities in rhizosphere soil, roots, and leaves of two dominant AM plants and a non-AM plant in Zoige Wetland. We found that along the soil - plant continuum, host plant selection intensity is higher in fungal than in bacterial communities in roots and leaves from rhizosphere soil in each plant species, and differs in fungal and bacterial communities in the AM- and non-AM plants. This is the first report provides evidence of different assembly patterns of fungal and bacterial communities along the soil-plant continuum in the AM- and non-AM plants in the Zoige Wetland.
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Affiliation(s)
- Jie Li
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
| | - Yu-Xuan Liu
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Peng-Peng Lü
- Lushan Botanical Garden, Chinese Academy of Sciences, Jiujiang, China
| | - Yong-Long Wang
- Faculty of Biological Science and Technology, Baotou Teacher's College, Baotou, China
| | - Zhong-Feng Li
- Research Institute of Subtropical Forestry, Chinese Academy of Forestry, Hangzhou, China
| | - Yue Zhang
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Hui-Yun Gan
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Xing-Chun Li
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
| | - Dipa Mandal
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Jing Cai
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Zi-Xuan Guo
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Hui Yao
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
| | - Liang-Dong Guo
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Sciences, Beijing, China
- College of Life Sciences, University of Chinese Academy of Sciences, Beijing, China
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Xue ZM, Yang G, Guo ZX, Gao ME, Qin QQ, Zhang YX, Zhao J, Kang YX, Li Y, Zhao RL. Investigation on knowledge level about rational use of antimicrobial drugs among pharmacists in medical institutions in Shanxi province, China. Public Health 2022; 209:67-72. [PMID: 35839623 DOI: 10.1016/j.puhe.2022.05.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Revised: 05/03/2022] [Accepted: 05/26/2022] [Indexed: 10/17/2022]
Abstract
OBJECTIVE To investigate the pharmacist's knowledge about rational use of antimicrobials in Shanxi of China, so as to find out the problems and provide support for the management of antimicrobials. METHODS A questionnaire survey was conducted, which included the basic information of the respondents, the basic knowledge about antimicrobial management and the related knowledge about antimicrobial drugs. SPSS 25.0 was used for statistical analysis. RESULTS A total of 462 pharmacists were investigated. The average score of the knowledge related to rational use of antimicrobials was 10.49 ± 4.05. It showed that the hospital type, grade, pharmacist's education, professional title and years of experience had effect on the pharmacist's knowledge level about antimicrobial drugs (P < 0.05). Multivariable logistic regression analysis showed that hospital grade and pharmacist's education were the main influencing factors (P < 0.05). CONCLUSION Pharmacists have insufficient knowledge about the rational use of antibacterial drugs. It is essential to strengthen the training in management regulations and application of antibacterial drugs.
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Affiliation(s)
- Z M Xue
- Department of Pharmacy, Shanxi Children's Hospital, Taiyuan, China.
| | - G Yang
- Department of Pediatrics, Shanxi Medical University, Taiyuan, China; Neonatal Internal Medicine, Children's Hospital of Shanxi, Taiyuan, China.
| | - Z X Guo
- Department of Pharmacy, Shanxi Children's Hospital, Taiyuan, China.
| | - M E Gao
- Department of Pharmacy, Shanxi Children's Hospital, Taiyuan, China.
| | - Q Q Qin
- Department of Pharmacy, Shanxi Children's Hospital, Taiyuan, China.
| | - Y X Zhang
- Department of Pharmacy, Shanxi Children's Hospital, Taiyuan, China.
| | - J Zhao
- Department of Pharmacy, Shanxi Children's Hospital, Taiyuan, China.
| | - Y X Kang
- Department of Pharmacy, Shanxi Children's Hospital, Taiyuan, China.
| | - Y Li
- Department of Pharmacy, Shanxi Children's Hospital, Taiyuan, China.
| | - R L Zhao
- Department of Pharmacy, Shanxi Children's Hospital, Taiyuan, China.
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7
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Zhou J, Jiang L, Zhang ZL, Wang ZR, Zhang YX, Lin X, Tang BH, Yao BF, Guo ZX, Yang JJ, Van Den Anker J, Wu YE, Zhao W. Population pharmacokinetics and dosing optimization of mezlocillin in neonates and young infants. J Antimicrob Chemother 2022; 77:2238-2244. [PMID: 35662337 DOI: 10.1093/jac/dkac176] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2022] [Accepted: 05/07/2022] [Indexed: 01/01/2023] Open
Abstract
OBJECTIVES Mezlocillin is used in the treatment of neonatal infectious diseases. However, due to the absence of population pharmacokinetic studies in neonates and young infants, dosing regimens differ considerably in clinical practice. Hence, this study aimed to describe the pharmacokinetic characteristics of mezlocillin in neonates and young infants, and propose the optimal dosing regimen based on the population pharmacokinetic model of mezlocillin. METHODS A prospective, open-label pharmacokinetic study of mezlocillin was carried out in newborns. Blood samples were collected using an opportunistic sampling method. HPLC was used to measure the plasma drug concentrations. A population pharmacokinetic model was developed using NONMEM software. RESULTS Ninety-five blood samples from 48 neonates and young infants were included. The ranges of postmenstrual age and birth weight were 29-40 weeks and 1200-4000 g, respectively, including term and preterm infants. A two-compartment model with first-order elimination was developed to describe the population pharmacokinetics of mezlocillin. Postmenstrual age, current weight and serum creatinine concentration were the most important covariates. Monte Carlo simulation results indicated that the current dose of 50 mg/kg q12h resulted in 89.2% of patients achieving the therapeutic target, when the MIC of 4 mg/L was used as the breakpoint. When increasing the dosing frequency to q8h, a dose of 20 mg/kg resulted in 74.3% of patients achieving the therapeutic target. CONCLUSIONS A population pharmacokinetic model of mezlocillin in neonates and young infants was established. Optimal dosing regimens based on this model were provided for use in neonatal infections.
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Affiliation(s)
- Jing Zhou
- Department of Clinical Pharmacy, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China.,Department of Pharmacy, Qilu Hospital of Shandong University Dezhou Hospital, Dezhou, China
| | - Li Jiang
- Department of Pediatrics, Qilu Hospital of Shandong University Dezhou Hospital, Dezhou, China
| | - Zhi-Ling Zhang
- Department of Pediatrics, Qilu Hospital of Shandong University Dezhou Hospital, Dezhou, China
| | - Zhao-Rui Wang
- Department of Pediatrics, Qilu Hospital of Shandong University Dezhou Hospital, Dezhou, China
| | - Yan-Xiu Zhang
- Department of Pediatrics, Qilu Hospital of Shandong University Dezhou Hospital, Dezhou, China
| | - Xu Lin
- Department of Pediatrics, Qilu Hospital of Shandong University Dezhou Hospital, Dezhou, China
| | - Bo-Hao Tang
- Department of Clinical Pharmacy, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Bu-Fan Yao
- Department of Clinical Pharmacy, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Zi-Xuan Guo
- Department of Clinical Pharmacy, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Jing-Jing Yang
- Department of Pharmacy, Qilu Hospital of Shandong University Dezhou Hospital, Dezhou, China
| | - John Van Den Anker
- Division of Clinical Pharmacology, Children's National Hospital, Washington, DC, USA.,Departments of Pediatrics, Pharmacology & Physiology, Genomics and Precision Medicine, George Washington University, School of Medicine and Health Sciences, Washington, DC, USA.,Department of Paediatric Pharmacology and Pharmacometrics, University Children's Hospital Basel, University of Basel, Switzerland
| | - Yue-E Wu
- Department of Clinical Pharmacy, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Wei Zhao
- Department of Clinical Pharmacy, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China.,NMPA Key Laboratory for Clinical Research and Evaluation of Innovative Drugs, Qilu Hospital of Shandong University, Shandong University, Jinan, China
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Guo ZX, Yang F, van den Anker JN, Zheng Y, Zhao W. A simplified method for bortezomib determination using dried blood spots in combination with liquid chromatography/tandem mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2021; 1181:122905. [PMID: 34438277 DOI: 10.1016/j.jchromb.2021.122905] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [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: 06/25/2021] [Revised: 08/12/2021] [Accepted: 08/20/2021] [Indexed: 11/30/2022]
Abstract
Bortezomib, a proteinase inhibitor currently used to treat multiple myeloma and mantle cell lymphoma, has a high incidence of adverse reactions and large inter-individual differences in plasma concentrations. A simple, validated LC-MS/MS method for the quantitative analysis of bortezomib in dried blood spot (DBS) samples was developed to provide support for determining the effective concentration range of bortezomib for clinical use. Fifty (i50) μL of spiked blood were added onto Whatman protein saver cards to prepare the DBS samples. Circular cards of 6 mm diameter were punched, extracted by methanol containing the internal standard (apatinib), and injected into the LC-MS/MS system. The method validation included selectivity, linearity, accuracy and precision, stability, matrix effect, recovery and hematocrit. The calibration curve showed correlation coefficient values higher than 0.999 in the range of 0.2 - 20.0 ng/mL for bortezomib. The acceptance criteria of accuracy (relative error < 12.5%) and precision (coefficient of variation < 10.7%) were met in all cases. The matrix effect was<13.2%, and the recovery was between 87.3 and 100.2%. DBS samples were shown to be stable when stored in cold conditions or at room temperature. Different hematocrit values did not significantly affect the accuracy of the measured concentrations. And there are no significant differences between bortezomib concentrations in DBS samples and plasma samples. This new method was successfully used for clinical concentration determinations of bortezomib and can be applied in future therapeutic drug monitoring and pharmacokinetic studies of bortezomib especially in pediatric patients.
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Affiliation(s)
- Zi-Xuan Guo
- Department of Clinical Pharmacy, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Fan Yang
- Department of Clinical Pharmacy, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Johannes N van den Anker
- Division of Clinical Pharmacology, Children's National Hospital, WA, DC, USA; Departments of Pediatrics, Pharmacology & Physiology, Genomics & Precision Medicine, George Washington University, School of Medicine and Health Sciences, WA, DC, USA; Department of Pediatric Pharmacology and Pharmacometrics, University Children's Hospital Basel, University of Basel, Switzerland
| | - Yi Zheng
- Department of Clinical Pharmacy, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China.
| | - Wei Zhao
- Department of Clinical Pharmacy, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan, China; Department of Clinical Pharmacy, Clinical Trial Center, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Engineering and Technology Research Center for Pediatric Drug Development, Shandong Medicine and Health Key Laboratory of Clinical Pharmacy, Jinan, China.
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9
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Kan M, Wu YE, Li X, Dong YN, Du B, Guo ZX, Shi HY, Huang X, Su LQ, Wang WQ, Zheng Y, Zhao W. An adapted LC-MS/MS method for the determination of free plasma concentration of cefoperazone in children: Age-dependent protein binding. J Chromatogr B Analyt Technol Biomed Life Sci 2020; 1144:122081. [DOI: 10.1016/j.jchromb.2020.122081] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2020] [Revised: 03/22/2020] [Accepted: 03/24/2020] [Indexed: 01/14/2023]
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10
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Li J, Guo ZX, Chen JA, Xue C, Sun LL, Ren ZG, Li A, Cui GY, Yu ZJ. [Studies on the role of chromobox protein homolog 2 in the inhibition of progression of hepatoma]. Zhonghua Gan Zang Bing Za Zhi 2019; 27:192-197. [PMID: 30929335 DOI: 10.3760/cma.j.issn.1007-3418.2019.03.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Objective: To explore chromobox protein homolog 2 (CBX2) expressions in relation to clinical features of patients and elucidate its role in the progression of hepatocellular carcinoma. Methods: Using the Cancer Genome Atlas (TCGA) database, R language was used to analyze the distribution of differentially expressed mRNA in hepatocellular carcinoma. The different expression of CBX2 in HCC and adjacent tissues and its relationship with survival and clinical characteristics of patients were further analyzed. The expression of CBX2 in liver tissues, liver cancer tissue, and L02, HepG2 and SMMC-7721 cell lines was detected by real time-PCR and western blot. The expression of CBX2 was interfered by siRNA in hepatoma cell line. MTT, colony formation, transwell assays, and flow cytometry were used to identify the proliferation, apoptosis, invasion and clone-formation ability of HepG2 and SMMC-7721 cells after CBX2 down-regulation. According to the different data, t-test, ANOVA, chi-square test, and COX regression model were used for statistical analysis. Survival curve was plotted through Kaplan-Meier method. Results: TCGA public database analysis showed that the expression of CBX2 mRNA in hepatocellular carcinoma tissues (7.296 ± 1.6115) was significantly higher than normal liver tissues (4.706 ± 0.940) (P = 0.000). In addition, the overall survival time of patients with low CBX2 mRNA expression was significantly longer than that of patients with high CBX2 mRNA expression [(5.971 ± 0.411) years vs. (4.650 ± 0.503) years, P = 0.001]. The expression level of CBX2 mRNA was correlated with the pathological TNM stage (P = 0.025) and differentiation degree (P < 0.001) of liver cancer. COX regression analysis showed that CBX2 mRNA expression was an independent predictor of patient survival (P = 0.013). siRNA was transfected and compared with the blank control group. The transgenic ability of HepG2 and SMMC-77221 cells decreased significantly at 72h (P < 0.05) and 96h (P < 0.05), and the apoptosis rate (11.430% ± 0.215%) was higher than blank control group (6.6 00% ± 0.170%) (P = 0.003). The number of invasive cells ((both P < 0.05) and relative colony forming cells ((both P < 0.001) were significantly decreased. In 20 cases of tissue samples, the expression of CBX2 protein (relative expression level 3.020 ± 0.269) in liver cancer was higher than that in adjacent tissues (relative expression level 0.886±0.065) (P < 0.001). The overall survival time of patients with low CBX2 expression in liver cancer was longer than that of patients with high expression [(3.670 + 0.576) years vs. (0.834 + 0.153) years, P = 0.004]. Conclusion: An evident high expression of CBX2 is an independent poor prognostic factor in hepatoma. Down-regulation of CBX2 expression can inhibit the progression of liver cancer. Therefore, CBX2 may be a prognostic biomarker and a new target for HCC treatment.
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Affiliation(s)
- J Li
- Infectious Diseases Department, the First Affliated Hospital of Zhengzhou University, Zhengzhou 450052, China; Precision Medicine Center, the First Affliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Z X Guo
- Infectious Diseases Department, the First Affliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - J A Chen
- Infectious Diseases Department, the First Affliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - C Xue
- Infectious Diseases Department, the First Affliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - L L Sun
- Infectious Diseases Department, the First Affliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Z G Ren
- Infectious Diseases Department, the First Affliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - A Li
- Precision Medicine Center, the First Affliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - G Y Cui
- Infectious Diseases Department, the First Affliated Hospital of Zhengzhou University, Zhengzhou 450052, China
| | - Z J Yu
- Infectious Diseases Department, the First Affliated Hospital of Zhengzhou University, Zhengzhou 450052, China
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11
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Yu Q, Guo ZX. [Facing tomorrow, the rapidly developing reproductive medicine]. Zhonghua Fu Chan Ke Za Zhi 2018; 53:740-741. [PMID: 30453419 DOI: 10.3760/cma.j.issn.0529-567x.2018.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
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12
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Wang Y, Guo ZX, Tan NW, Cheng HD, Song YL. [Analysis and discussion of risk factors related to dental implant failure]. Zhonghua Kou Qiang Yi Xue Za Zhi 2017; 52:510-512. [PMID: 28835034 DOI: 10.3760/cma.j.issn.1002-0098.2017.08.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The implant prosthesis has been extensively used in clinic recently, and implant failure is appearing. Many factors may cause the failure, and they work together generally. This paper summarizes and analyzes the failure cases related to implant treatment and relevant risk factors of oral implants in Department of Implantation, School of Stomatology, The Fourth Military Medical University during the past six years, in order to improve the success rate of implant prosthesis and provide guidance for clinical application.
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Affiliation(s)
- Y Wang
- Department of Implantation, School of Stomatology, The Fourth Military Medical University & State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Xi'an 710032, China
| | - Z X Guo
- Department of Prosthodontics, School of Stomatology, The Fourth Military Medical University & State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Key Laboratory of Stomatology, Xi'an 710032, China
| | - N W Tan
- Department of Implantation, School of Stomatology, The Fourth Military Medical University & State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Xi'an 710032, China
| | - H D Cheng
- Department of Implantation, School of Stomatology, The Fourth Military Medical University & State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Xi'an 710032, China
| | - Y L Song
- Department of Implantation, School of Stomatology, The Fourth Military Medical University & State Key Laboratory of Military Stomatology & National Clinical Research Center for Oral Diseases & Shaanxi Engineering Research Center for Dental Materials and Advanced Manufacture, Xi'an 710032, China
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Zhao XJ, Shan WW, He H, Xue X, Guo ZX, Li SF. From single atoms to self-assembled quantum single-atomic nanowires: noble metal atoms on black phosphorene monolayers. Phys Chem Chem Phys 2017; 19:7864-7870. [PMID: 28262871 DOI: 10.1039/c6cp08230k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Transition metal (TM) nanostructures, such as one dimensional (1D) nanowires with/without substrates, usually possess drastically different properties from their bulk counterparts, due to their distinct stacking and electronic confinement. Correspondingly, it is of great importance to establish the dominant driving force in forming 1D single-metal-atom-wires (SMAWs). Here, with first-principles calculations, taking the black phosphorene (BP) monolayer as a prototype 2D substrate, we investigate the energetic and kinetic properties of all the 5d-TM atoms on the 2D substrate to reveal the mechanism of formation of SMAWs. In contrast to other 5d- and 4d-TMs, noble metal elements Pd and Pt are found to prefer to grow along the trough in an atom-by-atom manner, self-assembling into SMAWs with a significant magic growth behavior. This is due to distinct binding energies and diffusion barriers along the trough, i.e., zig-zag direction, as compared to other directions of the BP. The present findings are valuable in the fabrication and modulation of 1D nanostructures which can be anticipated to possess desirable functionalities for potential applications such as in nanocatalysis, nanosensors, and related areas.
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Affiliation(s)
- X J Zhao
- International Laboratory for Quantum Functional Materials of Henan, School of Physics and Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China.
| | - Wen-Wen Shan
- North China University of Water Resources and Electric Power, Zhengzhou, 450011, China
| | - Hao He
- International Laboratory for Quantum Functional Materials of Henan, School of Physics and Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China.
| | - Xinlian Xue
- International Laboratory for Quantum Functional Materials of Henan, School of Physics and Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China.
| | - Z X Guo
- International Laboratory for Quantum Functional Materials of Henan, School of Physics and Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China. and Department of Chemistry, University College London, London WC1H 0AJ, UK
| | - S F Li
- International Laboratory for Quantum Functional Materials of Henan, School of Physics and Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China.
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14
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Shi JL, Wu JH, Zhao XJ, Xue XL, Gao YF, Guo ZX, Li SF. Substrate co-doping modulates electronic metal-support interactions and significantly enhances single-atom catalysis. Nanoscale 2016; 8:19256-19262. [PMID: 27808312 DOI: 10.1039/c6nr04292a] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Transitional metal nanoparticles or atoms deposited on appropriate substrates can lead to highly economical, efficient, and selective catalysis. One of the greatest challenges is to control the electronic metal-support interactions (EMSI) between the supported metal atoms and the substrate so as to optimize their catalytic performance. Here, from first-principles calculations, we show that an otherwise inactive Pd single adatom on TiO2(110) can be tuned into a highly effective catalyst, e.g. for O2 adsorption and CO oxidation, by purposefully selected metal-nonmetal co-dopant pairs in the substrate. Such an effect is proved here to result unambiguously from a significantly enhanced EMSI. A nearly linear correlation is noted between the strength of the EMSI and the activation of the adsorbed O2 molecule, as well as the energy barrier for CO oxidation. Particularly, the enhanced EMSI shifts the frontier orbital of the deposited Pd atom upward and largely enhances the hybridization and charge transfer between the O2 molecule and the Pd atom. Upon co-doping, the activation barrier for CO oxidation on the Pd monomer is also reduced to a level comparable to that on the Pd dimer which was experimentally reported to be highly efficient for CO oxidation. The present findings provide new insights into the understanding of the EMSI in heterogeneous catalysis and can open new avenues to design and fabricate cost-effective single-atom-sized and/or nanometer-sized catalysts.
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Affiliation(s)
- J L Shi
- International Laboratory for Quantum Functional Materials of Henan, School of Physics and Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China.
| | - J H Wu
- Department of Physics, Henan Institute of Education, Zhengzhou, 450046, China
| | - X J Zhao
- International Laboratory for Quantum Functional Materials of Henan, School of Physics and Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China.
| | - X L Xue
- International Laboratory for Quantum Functional Materials of Henan, School of Physics and Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China.
| | - Y F Gao
- Department of Materials Science and Engineering, University of Tennessee, Knoxville, Tennessee 37996, USA and Materials Science and Technology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
| | - Z X Guo
- Department of Chemistry, University College London, London WC1H 0AJ, UK and International Laboratory for Quantum Functional Materials of Henan, School of Physics and Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China.
| | - S F Li
- International Laboratory for Quantum Functional Materials of Henan, School of Physics and Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China.
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15
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Zhao XJ, Xue XL, Guo ZX, Li SF. Relative edge energy in the stability of transition metal nanoclusters of different motifs. Nanoscale 2016; 8:12834-12842. [PMID: 27296770 DOI: 10.1039/c6nr00486e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
When a structure is reduced to a nanometer scale, the proportion of the edge atoms increases significantly, which can play a crucial role in determining both their geometric and electronic properties, as demonstrated by the recently established generalized Wulff construction principle [S. F. Li, et al., Phys. Rev. Lett., 2013, 111, 115501]. Consequently, it is of great interest to clarify quantitatively the role of the edge atoms that dominate the motifs of these nanostructures. In principle, establishing an effective method valid for determining the absolute value of the surface energy and particularly the edge energy for a given nanostructure is expected to resolve such a problem. However, hitherto, it is difficult to obtain the absolute edge energy of transition metal clusters, particularly when their sizes approach the nanometer regime. In this paper, taking Ru nanoclusters as a prototypical example, our first-principles calculations introduce the concept of relative edge energy (REE), reflecting the net edge atom effect over the surface (facet) atom effect, which is fairly powerful to quasi-quantitatively estimate the critical size at which the crossover occurs between different configurations of a given motif, such as from an icosahedron to an fcc nanocrystal. By contrast, the bulk effect should be re-considered to rationalize the power of the REE in predicting the relative stability of larger nanostructures between different motifs, such as fcc-like and hcp-like nanocrystals.
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Affiliation(s)
- X J Zhao
- International Laboratory for Quantum Functional Materials of Henan, School of Physics and Engineering, Zhengzhou University, Zhengzhou, Henan 450001, China.
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Fu YT, Zheng X, He Q, Jia XY, Guo ZX, Yao RY, Wang YF, Wang ZG. Silencing FKBP38 gene by siRNA induces activation of mTOR signaling in goat fetal fibroblasts. Genet Mol Res 2015; 14:9675-82. [PMID: 26345900 DOI: 10.4238/2015.august.14.30] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
FKBP38 (also known as FKBP8) is a unique member of the FK506-binding protein (FKBP) family, and its role is controversial because it acts as an upstream regulator of the mTOR signaling pathway, which controls cell growth, proliferation, and differentiation. This study aimed to explore the role of FKBP38 in the activation of mTOR signaling in Cashmere goat (Capra hircus) fetal fibroblasts. To construct a Cashmere goat FKBP38 siRNA eukaryotic expression vector that targets FKBP38 mRNA, we designed shRNA based on the gene sequence deposited in GenBank (accession No. JF714970) and synthesized a DNA fragment encoding the shRNA. The DNA fragment was inserted into the pRNAT-U6.1/Neo vector to construct an expression vector of shRNA, which was labeled pRNAT-FKBP38-shRNA. The recombinant plasmid was used to transfect Cashmere goat fetal fibroblasts (GFb) using lipofectamine™2000. We found that cells were successfully transfected with pRNAT-U6.1/Neo-FKBP38-shRNA. Green fluorescence could be observed in cells following 48-h transfection. Proteins were then isolated from GFbs transfected with pRNAT-FKBP38-shRNA and from control cells, and protein expression was analyzed by western blot. Expression of FKBP38 decreased and mTOR signaling was activated, which induced the phosphorylation of mTOR, S6, and 4EBP1. Thus, FKBP38 gene-silencing activates mTOR signaling in goat cells.
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Affiliation(s)
- Y T Fu
- College of Life Sciences, Inner Mongolia University, Hohhot, China
| | - X Zheng
- College of Life Sciences, Inner Mongolia University, Hohhot, China
| | - Q He
- College of Life Sciences, Inner Mongolia University, Hohhot, China
| | - X Y Jia
- College of Life Sciences, Inner Mongolia University, Hohhot, China
| | - Z X Guo
- College of Life Sciences, Inner Mongolia University, Hohhot, China
| | - R Y Yao
- College of Life Sciences, Inner Mongolia University, Hohhot, China
| | - Y F Wang
- College of Life Sciences, Inner Mongolia University, Hohhot, China
| | - Z G Wang
- College of Life Sciences, Inner Mongolia University, Hohhot, China
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Yang J, Wang X, Wang Y, Guo ZX, Luo DZ, Jia J, Wang XM. Dopaminergic neuronal conversion from adult rat skeletal muscle-derived stem cells in vitro. Neurochem Res 2012; 37:1982-92. [PMID: 22723079 DOI: 10.1007/s11064-012-0819-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2012] [Revised: 05/09/2012] [Accepted: 05/28/2012] [Indexed: 11/26/2022]
Abstract
Muscle-derived stem cells reside in the skeletal muscle tissues and are known for their multipotency to differentiate toward the mesodermal lineage. Recent studies have demonstrated their capacity of neuroectodermal differentiation, including neurons and astrocytes. In this study, we investigated the possibility of dopaminergic neuronal conversion from adult rat skeletal muscle-derived stem cells. Using a neurosphere protocol, muscle-derived stem cells form neurosphere-like cell clusters after cultivation as a suspension, displaying an obvious expression of nestin and a remarkable down-regulation of myogenic associated factors desmin, MyoD, Myf5 and myogenin. Subsequently, these neurosphere-like cell clusters were further directed to dopaminergic differentiation through two major induction steps, patterning to midbrain progenitors with sonic hedgehog and fibroblast growth factor 8, followed by the differentiation to dopaminergic neurons with neurotrophic factors (glial cell line-derived neurotrophic factor) and chemicals (ascorbic acid, forskolin). After the differentiation, these cells expressed tyrosine hydroxylase, dopamine transporter, dopamine D1 receptor and synapse-associated protein synapsin I. Several genes, Nurr1, Lmx1b, and En1, which are critically related with the development of dopaminergic neurons, were also significantly up-regulated. The present results indicate that adult skeletal muscle-derived stem cells could provide a promising cell source for autologous transplantation for neurodegenerative diseases in the future, especially the Parkinson's disease.
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Affiliation(s)
- Jian Yang
- Key Laboratory for Neurodegenerative Disease of Education Ministry, Department of Physiology and Neurobiology, Capital Medical University, 10# Youanmen, Beijing 100069, People's Republic of China
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Catlow CRA, Guo ZX, Miskufova M, Shevlin SA, Smith AGH, Sokol AA, Walsh A, Wilson DJ, Woodley SM. Advances in computational studies of energy materials. Philos Trans A Math Phys Eng Sci 2010; 368:3379-3456. [PMID: 20566517 DOI: 10.1098/rsta.2010.0111] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
We review recent developments and applications of computational modelling techniques in the field of materials for energy technologies including hydrogen production and storage, energy storage and conversion, and light absorption and emission. In addition, we present new work on an Sn2TiO4 photocatalyst containing an Sn(II) lone pair, new interatomic potential models for SrTiO3 and GaN, an exploration of defects in the kesterite/stannite-structured solar cell absorber Cu2ZnSnS4, and report details of the incorporation of hydrogen into Ag2O and Cu2O. Special attention is paid to the modelling of nanostructured systems, including ceria (CeO2, mixed Ce(x)O(y) and Ce2O3) and group 13 sesquioxides. We consider applications based on both interatomic potential and electronic structure methodologies; and we illustrate the increasingly quantitative and predictive nature of modelling in this field.
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Affiliation(s)
- C R A Catlow
- Department of Chemistry, Materials Chemistry, 3rd Floor, Kathleen Lonsdale Building, University College London, , Gower Street, London WC1E 6BT, UK.
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Cui YQ, Zhang LJ, Zhang T, Luo DZ, Jia YJ, Guo ZX, Zhang QB, Wang X, Wang XM. Inhibitory effect of fucoidan on nitric oxide production in lipopolysaccharide-activated primary microglia. Clin Exp Pharmacol Physiol 2010; 37:422-8. [DOI: 10.1111/j.1440-1681.2009.05314.x] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Chen MF, You C, Li SJ, Yang R, Guo ZX. The formation of nanocrystallite bone-like apatite on chemically treated Ti-24Nd-4Zr-7.9Sn alloy. J Nanosci Nanotechnol 2009; 9:1214-1217. [PMID: 19441490 DOI: 10.1166/jnn.2009.c122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Ti-24Nd-4Zr-7.9Sn alloy with low elastic modulus and high strength is a great candidate for artificial biomaterials used in orthopedic and dental implants. In order to improve biocompatibility, a biomimetic process was employed to deposit a bone-like apatite nanocrystal coating on alloy. Analysis of the coatings showed that a net-like Na2TiO3 layer with about 100 nm in size was formed on Ti-24Nd-4Zr-7.9Sn treated by NaOH. Consequently, a carbonated apatite nanocrystal coating, namely bone-like apatite, was biomimetically deposited on Na2TiO3 layer, which has similar mineral composition to that of natural bone. The growth mechanism of bone-like layer is also discussed.
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Affiliation(s)
- M F Chen
- School of Materials Science and Engineering, Tianjin University of Technology, Tianjin, 300191, China
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Hong TF, Guo ZX, Yang R. Fabrication of porous titanium scaffold materials by a fugitive filler method. J Mater Sci Mater Med 2008; 19:3489-3495. [PMID: 18622764 DOI: 10.1007/s10856-008-3527-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2008] [Accepted: 06/25/2008] [Indexed: 05/26/2023]
Abstract
A clean powder metallurgy route was developed here to produce Ti foams, using a fugitive polymeric filler, polypropylene carbonate (PPC), to create porosities in a metal-polymer compact at the pre-processing stage. The as-produced foams were studied by scanning electron microscopy (SEM), LECO combustion analyses and X-ray diffraction (XRD). Compression tests were performed to assess their mechanical properties. The results show that titanium foams with open pores can be successfully produced by the method. The compressive strength and modulus of the foams decrease with an increasing level of porosity and can be tailored to those of the human bones. After alkali treatment and soaking in a simulated body fluid (SBF) for 3 days, a thin apatite layer was formed along the Ti foam surfaces, which provides favourable bioactive conditions for bone bonding and growth.
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Affiliation(s)
- T F Hong
- Department of Materials Engineering, National Pingtung University of Science and Technology, Pingtung, 91201, Taiwan.
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Abstract
This work reported an experimental investigation of complete oxidation of nickel nanoparticles using simultaneous thermogravimetry analysis (TGA) and differential scanning calorimetry (DSC). Nickel nanoparticles and their elemental compositions were characterized by Brunauer-Emmett-Teller (BET) analysis, transmission electron microscopy (TEM) and energy dispersive X-ray spectroscopy (EDS). The oxidation experiments were performed under isoconversion conditions for seven heating rates, varying from 2 to 20 K min(-1), with temperatures up to 1000 degrees C. The experiments revealed unique oxidation behaviour of nickel at the nanometre scale, such as early oxidation and melting phenomena, variable activation energies and different oxidation kinetics between low and high conversion ratios. Unlike its bulk counterpart where the activation energy is a constant, the activation energy of nickel nanoparticles depended on the conversion ratio, ranging between 1.4 and 1.8 eV. The oxidation kinetics of nickel nanoparticles changed from the classical diffusion controlled mechanism to a pseudo-homogeneous reaction as conversion ratios were over 50%. The oxidation mechanisms of nickel nanoparticles were further discussed and future studies to enhance understanding were identified.
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Affiliation(s)
- Pengxiang Song
- School of Engineering and Materials Science, Queen Mary, University of London, London, UK
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Abstract
Based on density functional theory, the geometrical and electronic structures of oxygen-functionalized single-wall carbon nanotubes (O-SWCNs) are obtained, of which the vibrational properties are calculated in terms of lattice dynamics theory. Both bond expansion and contraction are found to coexist in O-SWCNs. A distinct Raman shift is observed in the radial breathing mode (RBM) and the G modes, depending not only on the tube diameter and chirality but also on oxygen coverage and adsorption configurations. With the oxygen coverage increasing, interestingly, a nonmonotonic upshift and downshift is observed in the G modes, which is attributed to the competition between the bond expansion and contraction. In addition, the resonance Raman effect at different oxygen coverage, which may be observable in O-SWCNs, is discussed.
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Affiliation(s)
- Z X Guo
- Department of Physics, Xiangtan University, Xiangtan 411105, Hunan, People's Republic of China
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24
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Abstract
Based on the density functional theory, we obtain the optimum geometry of carbon chain inside a carbon nanotube. The phonon spectrum and specific heat of such a chain and nanotube hybrid system are calculated in terms of lattice dynamics theory. Some new phonon branches that have been obtained come from the coupling vibrations of the nanotube and the chain. The bending and stretching modes of the chain appear at about 520 cm(-1)and 1935 cm(-1) at Gamma point, respectively. It is found that the softening of G modes results mainly from the chain induced variations in the bond length on nanotube, independent of van der Waals interaction, while the stiffening of radial breathing mode is developed by the competition between the two factors. In the low-frequency region, the vibrational density of states are very different from that of the bare nanotube. Its specific heat implies the underlying quantized phonon structures and much large thermal conductivity in the hybrid system. In addition, the chain-length dependent vibration modes are calculated, from which it is expected that a finite chain of about 14 carbon atoms in the nanotube may produce the experimental Raman peak at about 1850 cm(-1).
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Affiliation(s)
- Z X Guo
- Department of Physics, Xiangtan University, Xiangtan 411105, Hunan, China
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Song Y, Singh R, Guo ZX. A First-Principles Study of the Electronic Structure and Stability of a Lithium Aluminum Hydride for Hydrogen Storage. J Phys Chem B 2006; 110:6906-10. [PMID: 16571001 DOI: 10.1021/jp0603280] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
LiAlH4 holds great promise for reversible hydrogen storage, where a fundamental understanding of hydrogen interaction with the metal elements is essential to further improve its properties. The present paper reports a first-principles study of its stability and electronic structure, using a full potential linearized augmented plane wave (FLAPW) method within the generalized gradient approximation (GGA) for high accuracy. The theoretically calculated heat of formation agrees well with experiment. The electronic structures show that the H atoms bond nonequivalently with the Al in the [AlH4]- ligand, which leads to complex dehydrogenation characteristics of LiAlH4.
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Affiliation(s)
- Y Song
- London Centre for Clean Energy, Department of Materials, Queen Mary University of London, Mile End Road, London E1 4NS, United Kingdom
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Darr JA, Guo ZX, Raman V, Bououdina M, Rehman IU. Metal organic chemical vapour deposition (MOCVD) of bone mineral like carbonated hydroxyapatite coatingsElectronic supplementary information (ESI) available: experimental data. See http://www.rsc.org/suppdata/cc/b3/b312855p/. Chem Commun (Camb) 2004:696-7. [PMID: 15010786 DOI: 10.1039/b312855p] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
For the first time, the MOCVD technique has been used to deposit carbonated hydroxyapatite onto Ti6AL4V substrates using volatile monomeric (liquid) complexes [Ca(beta-diketonate)(2)(L)] and P(OEt)(3).
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Affiliation(s)
- J A Darr
- Department of Materials, Queen Mary University of London, Mile End Road, London, UK E1 4NS.
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Xu XL, Zhu NS, Guo ZX. [The software design for the molecular biological image processing system]. Zhongguo Yi Liao Qi Xie Za Zhi 2001; 25:9-15. [PMID: 12583292] [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: 05/24/2023]
Abstract
With the use of Visual Basic 6.0 language and molecular biological technology, we have developed a new molecular biological information processing system to detect the characteristic parameter of molecular biological electrophoresis image. The software can determine the molecular weight of the restriction endonuclease hydrolytic DNA fragment and protein or other macromolecules. The application indicates that the system with its accuracy reliability high efficiency and a large capacity of data to be stored, It is very useful to gene diagnosis and molecular biological researches.
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Affiliation(s)
- X L Xu
- Department of Medical Instrumentation, Shanghai Medical Instrumentation College
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Hu XW, Xiao CZ, Li ZH, Guo ZX, Gao LH, Zhang ZG, Xu ZP, Wang F. [Production of u-PA with rCHO cell culture on porous microcarriers in serum-free growth medium]. Sheng Wu Gong Cheng Xue Bao 2000; 16:387-91. [PMID: 11059287] [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: 02/18/2023]
Abstract
A novel technique was developed to deal with apoptosis in large-scale animal cell culture. By means of replacing part of Cytopore porous microcarriers at regular intervals, a rCHO cell line, which produces urokinase-type plasminogen activitor(u-PA), was cultivated continuously with serum-free medium in a 30 L stirred tank for 91 days. The cell density was maintained at (1.3-2.6) x 10(7)/mL, and > 90% of cells was viable. In order to reduce the effect of cell density on cell growth and expression, a cyclic pressure oscillation was exerted on a 7.5 L reactor headspace to enhance cell expression at high cell density to a certain extent. During the 67 days of medium-replacement culture, the maximal cell density reached 2.64 x 10(7)/mL, and cell viability was always kept above 95% when combined with microcarrier-replacement. Compare to control culture, culture with cyclic pressure oscillation could enhance cell expression level and reduce the ratio of glucose metabolized anaerobically to produce lactate. With four-step purification process, about 80 g u-PA(approximately 90% scu-PA) was recovered from approximately 2100 liters supernatant which contained approximately 135 g u-PA.
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Affiliation(s)
- X W Hu
- Institute of Biotechnology, Academy of Military Medical Sciences, Beijing
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Qian F, Xiao CZ, Gao LH, Zhang ZG, Guo ZX, Yu WY. [Expression of prourokinase in different mammalian cells]. Sheng Wu Gong Cheng Xue Bao 2000; 16:349-52. [PMID: 11059279] [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: 02/18/2023]
Abstract
Comparison studies of recombinant prourokinase(pro-UK) in various host cells, and expression vectors were carried out. Expression levels of vectors constructed in this study in different cell lines were compared. Mammalian cells expressing pro-UK were established. The levels of pro-UK expression in recombinant Namalwa, Vero and Sp2/0 cells are 200, 12.5 and 50 IU/(10(6) cells 24 h). pro-UK purities separated by immunoaffinity chromatograph are above 90%. Immunoabsorbent assay showed the ratio of pro-UK in CHO cells is lower than that from Vero and Namalwa cells. This study provide new host cells for pro-UK production.
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Affiliation(s)
- F Qian
- Institute of Biotechnology, Beijing
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Guo ZX, Shen HX. A highly sensitive assay for protein using resonance light-scattering technique with dibromohydroxyphenylfluorone-molybdenum(VI) complex. Spectrochim Acta A Mol Biomol Spectrosc 1999; 55A:2919-2925. [PMID: 10659451 DOI: 10.1016/s1386-1425(99)00168-7] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
At pH 2.8 and in the presence of 0.090% p-octylpolyethyleneglycol phenylether, the resonance light-scattering (RLS) spectrum of molybdenum(VI) complex with dibromohydroxyphenylfluorone (DBHPF) has a sharp peak at 586 nm. If the micro protein coexists with Mo(VI) and DBHPF, the RLS intensity of the complex at 586 nm is significantly enhanced by protein due to the binding interaction between protein and DBHPF-Mo(VI) complex. Based on this a new assay for protein is described. The dynamic ranges for bovine and human serum albumins are both 0.05-0.75 mg l-1 with detection limits of 13 and 15 ng ml-1, respectively. Besides high sensitivity, the method is characterized by good reproducibility, rapidity of reaction, good stability of chemical system, commonality of spectrofluorometer, few coexisting substances, especially detergents. The determinations of diluted human serum and urine by this method give the results very close to these by the Coomassie brilliant blue G-250 colorimetry, with relative standard deviations of five duplicates of 1.8-2.5%.
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Affiliation(s)
- Z X Guo
- Department of Chemistry, Nankai University, Tianjin, People's Republic of China
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Guo ZX, Wang RS, Guo XC. [Clinical observation on treatment of 40 cases of apoplexy hemiplegia complicated shoulder-hand syndrome with electro-acupuncture]. Zhongguo Zhong Xi Yi Jie He Za Zhi 1995; 15:646-8. [PMID: 8732146] [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: 02/01/2023]
Abstract
The authors treated 40 cases of shoulder-hand syndrome of apoplexy hemiplegia with electro-acupuncture (EA) and filiform needle acupuncture (FNA) respectively. The results showed that EA had better results in treating hand back swelling, hand skin temperature elevating and the bending finger caused pain than that with FNA (P < 0.05). The finger joint and shoulder joint improvement (the functional scoring increased for 3 points or more) in EA was also better than that of FNA (P < 0.05). The total marked effective rate was higher in EA group (75%) than that in FNA (50%), P < 0.05). It suggested that EA produced rhythmic muscle contraction which had a "shoulder-hand pump" like action, and is significant in eliminating hand back swelling and preventing atrophy of hand muscles.
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Guo ZX, Haines AH, Pyke SM, Pyke SG, Taylor RJ. Improved preparation of (+/-)-(1,3/2,4)-5-cyclohexene-1,2,3,4-tetrol [(+/-)-conduritol-B] and its reaction with hydrobromic and hydrochloric acid; synthesis and characterisation of some (+/-)-1-deoxy-1-halo- and (+/-)- 1,4-dideoxy-1,4-dihalo-conduritols. Carbohydr Res 1994; 264:147-53. [PMID: 8001016 DOI: 10.1016/0008-6215(94)00188-x] [Citation(s) in RCA: 26] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Z X Guo
- School of Chemical Sciences, University of East Anglia, Norwich, United Kingdom
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Guo ZX, Fu XL. [Surgical treatment of laryngeal cancer]. Zhonghua Zhong Liu Za Zhi 1988; 10:54-6. [PMID: 3416699] [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: 01/05/2023]
Abstract
From March 1974 to December 1982, 186 patients with laryngeal cancer were treated by operation alone in our hospital. In this series, the average age was 56.5 years. The sex ratio of male and female was 2.9:1. Total laryngectomy comprised 42%, partial laryngectomy 20.4% and postlaryngectomy reconstruction 37.6%. The 3 and 5 year survival rates were 75% and 74% for glottic cancer, 67% and 61% for supraglottic cancer, 67% and 67% for infraglottic cancer, 70% and 38% for transglottic cancer. The authors believe that, at present, operation is the main method of treatment. For early laryngeal cancer, partial laryngectomy is indicated for better postoperative functions in addition to higher survival rate. In advanced laryngeal cancer, total laryngectomy and other radical operation as well as combined therapy are advocated.
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Affiliation(s)
- Z X Guo
- Shenyang Hospital, PLA Air Force
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Guo ZX. Results of reconstructive laryngectomy in 55 patients. Chin Med J (Engl) 1987; 100:835-8. [PMID: 3127139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023] Open
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35
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Tang GY, Guo ZX, Ren ZY. [Re-evaluation of the effect of formalin and other scolicidal agents in hydatid surgery]. Zhonghua Wai Ke Za Zhi 1985; 23:362-4, 383. [PMID: 4053853] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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