186 results on '"D. Yan"'
Search Results
2. [NECRC syndrome caused by ZMYM2 gene variation in 2 cases].
- Author
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Yan D, Wang JL, Zhao NN, Huang K, Wu W, Dong GP, and Wang JL
- Subjects
- Humans, Male, Female, Child, Preschool, Mutation, Craniofacial Abnormalities genetics, Infant, Child, Abnormalities, Multiple genetics
- Published
- 2024
- Full Text
- View/download PDF
3. [Advances in in vitro assessment models and screening methods for blood glucose-lowering medications].
- Author
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Dong LJ, Long JL, Zhang J, Zhang Y, and Yan D
- Subjects
- Humans, Animals, Drug Evaluation, Preclinical methods, Blood Glucose drug effects, Blood Glucose analysis, Hypoglycemic Agents pharmacology
- Abstract
Diabetes, a common metabolic condition, is recognized by the worldwide public health community as a serious chronic illness. International new drug discovery has long been dominated by the study and creation of blood glucose-lowering medications. Important phases in the development process of these medications include the in vitro assessment model and screening methods, which can dramatically lower the costs and risks of subsequent clinical trials and increase the effectiveness and efficiency of drug development. This article reviews the classic and latest cutting-edge in vitro assessment models, principles, methods, and key technologies for blood glucose-lowering medications both domestically and internationally. By objectively evaluating their advantages, disadvantages, characteristics, applicability, experimental design, and data analysis, this article aims to improve the standardization and consensus of in vitro assessment models and screening methods and serve the research and development of blood glucose-lowering medications.
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- 2024
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4. [Recent advances in the bioproduction of mannitol].
- Author
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Yan D, Cai X, Xue H, Zhen N, Wu Y, Liu Z, Li M, and Zheng Y
- Subjects
- Bacteria metabolism, Bacteria genetics, Metabolic Engineering methods, Mannitol metabolism, Fermentation, Industrial Microbiology methods
- Abstract
D-mannitol is a six-carbon sugar alcohol and one of the most abundant polyols in the nature. With antioxidant and osmotic pressure-regulating effects and non-metabolism by the human body, D-mannitol has been widely used in functional food and pharmaceutical industries. At present, a major way for industrial production of D-mannitol is chemical hydrogenation. In addition, D-Mannitol can be produced by microbial metabolism or catalysis. Compared with the chemical hydrogenation, the microbial methods for synthesizing mannitol do not produce sorbitol as a by-product and have the advantages of mild reaction conditions, strong specificity, and high conversion rate. Microbial fermentation is praised for easy access of strains and raw materials and simple separation of the product. Microbial catalysis usually adopts a multi-enzyme coupling strategy, which uses enzymes produced by engineered bacteria for whole-cell catalysis, and the cofactor recycling pathway is introduced to replenish expensive cofactor. This method can achieve high yields with cheap substrates under mild conditions without the formation of by-products. However, the application of microbial methods in the industrial production of D-mannitol is limited by the high costs of fermentation media and substrates and the long reaction time. This article reviews the reported microbial methods for producing D-mannitol, including the use of high-yielding strains and their fermentation processes, the utilization of low-cost substrates, whole-cell catalytic strategies, and the process control for high productivity. The biosynthesis of mannitol is not only of great significance for promoting industrial upgrading and realizing green manufacturing, but also provides strong support for the development of new bio-based products to meet the growing market demand. With the continuous improvement of technological innovation and industrial chain, it is expected to become one of the main ways of mannitol production in the future.
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- 2024
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5. [The application of inflammation-related cytokines in early diagnosis and disease assessment of rheumatoid arthritis].
- Author
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Yan D, Wan L, Zhang M, Wang S, and Li F
- Subjects
- Humans, Female, Male, Middle Aged, Adult, C-Reactive Protein analysis, Blood Sedimentation, Aged, Inflammation diagnosis, Inflammation blood, Severity of Illness Index, Arthritis, Rheumatoid diagnosis, Arthritis, Rheumatoid blood, Cytokines blood, Early Diagnosis
- Abstract
Objective To measure the serum contents of cytokines in patients with rheumatoid arthritis (RA) and explore the clinical application value of combined detection of inflammatory cytokines in evaluating the severity of RA. Methods This study recruited 28 RA patients and 15 healthy individuals who received health checkups during the same period. The expression of inflammatory cytokines including interleukin 1β (IL-1β), IL-2, IL-5, IL-6, IL-8, IL-12P70, IL-17, tumor necrosis factor-α (TNF-α), interferon α (IFN-α), IFN-γ, IL-4 and IL-10 were detected with the multiplexed microsphere-based flow cytometric immunoassay. C-reactive protein (CRP) was detected with an automatic biochemical instrument, and erythrocyte sedimentation rate (ESR) was measured by the Westergren method. The disease activity score in 28 joints (DAS28) in the RA group was calculated, and the area under the curve (AUC) of each cytokine and RA disease activity was compared. The correlation of serum levels of inflammatory cytokines with CRP and ESR was analyzed in RA patients. Results In RA patients, the serum levels of IL-2, IL-6, IL-12P70, IL-4 and IL-10 were significantly correlated with the indicator of RA disease activity DAS28-CRP, and the serum levels of IL-12P70, TNF-α and IL-4 were markedly correlated with the indicator of RA disease activity DAS28-ESR. CRP was positively correlated with IL-6 (r=0.515), IL-12P70 (r=0.530), IL-4 (r=0.539), and IL-10(r=0.434). ESR was positively correlated with IL-6 (r=0.403), IL-12P70 (r=0.475), TNF-α (r=0.497), and IL-4 (r=0.450). Compared with the normal CRP and ESR group, the abnormal CRP group showed an increase in the levels of IL-6, IL-12P70, IL-2, IL-4 and IL-10, and the abnormal ESR group exhibited an elevation in the levels of IL-12P70, IL-4 and TNF-α. The expression of IL-8, IFN-α and IFN-γ was higher in the experimental group than in the control group. Conclusion Serum inflammatory cytokines detection has shed light on the early diagnosis and severity evaluation of RA and can be used as a pivotal indcator for the diagnosis of RA.
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- 2024
6. [Diagnostic Value of Interleukin 6, Interleukin 12P70, Serum Amyloid A, and Procalcitonin for Rheumatoid Arthritis and Their Relationship With the Disease Activity].
- Author
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Li F, Wan L, Yan D, Zhang M, and Wang S
- Subjects
- Humans, Blood Sedimentation, Male, Female, C-Reactive Protein metabolism, C-Reactive Protein analysis, Middle Aged, ROC Curve, Arthritis, Rheumatoid diagnosis, Arthritis, Rheumatoid blood, Serum Amyloid A Protein metabolism, Procalcitonin blood, Interleukin-6 blood, Biomarkers blood, Interleukin-12 blood
- Abstract
Objective: To observe the diagnostic value of four serum inflammatory biomarkers, including interleukin 6 (IL-6), interleukin 12P70 (IL-12P70), serum amyloid A (SAA), and procalcitonin (PCT), in rheumatoid arthritis (RA) and to analyze their relationship with the disease activity., Methods: The study included 60 RA patients admitted to the Department of Rheumatology at Anhui Provincial Hospital of Traditional Chinese Medicine between December 2022 and December 2023. Thirty healthy individuals from the hospital's physical examination center served as the control group. Serum levels of IL-6 and IL-12P70 were detected using flow cytometry. SAA levels were determined by immunoturbidimetry, and PCT levels were assessed by chemiluminescence. Erythrocyte sedimentation rate (ESR), C-reactive protein (CRP), rheumatoid factor (RF), and anticyclic citrullinated peptide (ACCP) were detected using an automated biochemical analyzer. The 28-joint disease activity scores (DAS28-ESR) based on ESR were observed. Statistical analysis included t -tests, rank-sum tests, and Kruskal-Wallis H tests to compare the expression differences of the biomarkers among different groups. The diagnostic value of these biomarkers for RA was analyzed by ROC curve analysis. Spearman correlation analysis was performed to assess the relationships between the four inflammatory biomarkers and CRP, ESR, RF, ACCP, and DAS28-ESR., Results: 1) The expression levels of SAA, IL-6, and IL-12P70 in the RA group were significantly higher than those in the control group ( P <0.01). 2) ROC curve analysis showed that the area under the curve (AUC) for PCT was 0.611 (95% confidence interval [CI]: 0.488-0.735, P >0.05), for SAA, it was 0.819 (95% CI: 0.733-0.906, P <0.01), for IL-6, it was 0.875 (95% CI: 0.803-0.946, P <0.01), and for IL-12P70, it was 0.832 (95% CI: 0.746-0.917, P <0.01). The combined index of IL-6, IL-12P70, SAA, and PCT had an AUC of 0.973 (95% CI: 0.942-1.000, P <0.01). This indicates that the four inflammatory biomarkers can assist in the diagnosis of rheumatoid arthritis. 3) The expression levels of PCT and SAA varied significantly among the high, moderate, and low activity RA groups ( P <0.01). 4) In RA patients, CRP was positively correlated with SAA ( r
s =0.75, P <0.01), and IL-6 ( rs =0.52, P <0.01). ESR was positively correlated with SAA ( rs =0.36, P <0.01). DAS28-ESR was positively correlated with PCT ( rs =0.34, P =0.01), SAA ( rs =0.51, P <0.01) and IL-6 ( rs =0.33, P =0.01)., Conclusion: The four inflammatory biomarkers (PCT, SAA, IL-6, and IL-12P70) are closely related to rheumatoid arthritis disease activity and can serve as serum indicators to assist in the diagnosis and assessment of RA., Competing Interests: 利益冲突 所有作者均声明不存在利益冲突, (© 2024《四川大学学报(医学版)》编辑部 版权所有Copyright ©2024 Editorial Office of Journal of Sichuan University (Medical Sciences).)- Published
- 2024
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7. Construction and evaluation of short - term and long - term mortality risk prediction model for patients with sepsis based on MIMIC - IV database.
- Author
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Yan D, Xie X, Fu X, Xu D, Li N, and Yao R
- Subjects
- Humans, Female, Male, Risk Factors, Prognosis, Databases, Factual, Risk Assessment methods, Intensive Care Units statistics & numerical data, Middle Aged, Area Under Curve, Aged, Organ Dysfunction Scores, Proportional Hazards Models, Sepsis mortality, Sepsis diagnosis
- Abstract
Objectives: Given the high incidence and mortality rate of sepsis, early identification of high-risk patients and timely intervention are crucial. However, existing mortality risk prediction models still have shortcomings in terms of operation, applicability, and evaluation on long-term prognosis. This study aims to investigate the risk factors for death in patients with sepsis, and to construct the prediction model of short-term and long-term mortality risk., Methods: Patients meeting sepsis 3.0 diagnostic criteria were selected from the Medical Information Mart for Intensive Care-IV (MIMIC-IV) database and randomly divided into a modeling group and a validation group at a ratio of 7꞉3. Baseline data of patients were analyzed. Univariate Cox regression analysis and full subset regression were used to determine the risk factors of death in patients with sepsis and to screen out the variables to construct the prediction model. The time-dependent area under the curve (AUC), calibration curve, and decision curve were used to evaluate the differentiation, calibration, and clinical practicability of the model., Results: A total of 14 240 patients with sepsis were included in our study. The 28-day and 1-year mortality were 21.45% (3 054 cases) and 36.50% (5 198 cases), respectively. Advanced age, female, high sepsis-related organ failure assessment (SOFA) score, high simplified acute physiology score II (SAPS II), rapid heart rate, rapid respiratory rate, septic shock, congestive heart failure, chronic obstructive pulmonary disease, liver disease, kidney disease, diabetes, malignant tumor, high white blood cell count (WBC), long prothrombin time (PT), and high serum creatinine (SCr) levels were all risk factors for sepsis death (all P <0.05). Eight variables, including PT, respiratory rate, body temperature, malignant tumor, liver disease, septic shock, SAPS II, and age were used to construct the model. The AUCs for 28-day and 1-year survival were 0.717 (95% CI 0.710 to 0.724) and 0.716 (95% CI 0.707 to 0.725), respectively. The calibration curve and decision curve showed that the model had good calibration degree and clinical application value., Conclusions: The short-term and long-term mortality risk prediction models of patients with sepsis based on the MIMIC-IV database have good recognition ability and certain clinical reference significance for prognostic risk assessment and intervention treatment of patients.
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- 2024
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8. [Analysis of genetic variants in a child with Intellectual developmental disorder with behavioral abnormalities and craniofacial dysmorphism without seizures].
- Author
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Tong J, Wang T, Wang L, and Yan D
- Subjects
- Child, Male, Humans, Infant, Developmental Disabilities genetics, Seizures genetics, Mutation, Craniofacial Abnormalities genetics, Intellectual Disability genetics, Problem Behavior
- Abstract
Objective: To explore the clinical phenotype and genetic characteristics of a child with Intellectual developmental disorder with behavioral abnormalities and craniofacial malformations without epilepsy (IDDBCS)., Methods: A child who had visited the Lianyungang Maternal and Child Health Care Hospital in April 2021 was selected as the study subject. Clinical data of the child were collected. Genomic DNA was extracted from peripheral blood samples of the child and his parents and subjected to whole exome sequencing (WES). Candidate variants were verified by Sanger sequencing of his family members., Results: The child, a 3-year-and-4-month-old male, had presented with global developmental delay and cranial malformation. Genetic testing revealed that he has harbored a heterozygous c.1703delA (p.K568Sfs9) variant of the PHF21A gene, for which both of his parents were of the wild type. This low-frequency variant may alter the structure and function of the protein product. Based on the guidelines from the American College of Medical Genetics and Genomics (ACMG), it was classified as a pathogenic variant (PVS1+PS2+PM2_Supporting)., Conclusion: The heterozygous c.1703delA (p.K568Sfs9) variant of the PHF21A gene probably underlay the IDDBCS in this patient.
- Published
- 2023
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9. [Analysis of a child with severe combined immunodeficiency due to variants of DCLRE1C gene].
- Author
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Xu X, Yan D, Yin J, Zheng J, Wang X, and Shu J
- Subjects
- Child, DNA Copy Number Variations, DNA-Binding Proteins genetics, Endonucleases genetics, Exons, Family, Humans, Mutation, Exome Sequencing, Severe Combined Immunodeficiency genetics
- Abstract
Objective: To explore the genetic etiology of a child with severe combined immunodeficiency (SCID)., Methods: Whole exome sequencing (WES) and copy number variation (CNV) analysis were carried out to screen potential variants in the proband. Suspected variants were validated by Sanger sequencing and qPCR., Results: WES showed that the proband harbored compound heterozygous variants of the DCLRE1C gene, namely deletion of exons 1-3 and c.322G>A (p.Val108Met) in exon 5. The exon 1-3 deletion was derived from his father and was known to be pathogenic, while the c.322G>A was derived from his mother and was unreported previously., Conclusion: The compound heterozygous variants of the DCLRE1C gene probably underlay the SCID in this child.
- Published
- 2022
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10. [Rationality evaluation of Shuanghuanglian Injection combined with Ampicillin Sodium for Injection based on sequential analysis].
- Author
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Xu Y, Li JL, Liu S, Wang ZZ, Huang MY, Wang AT, Liu XW, and Yan D
- Subjects
- Calorimetry, Drug Combinations, HEK293 Cells, Humans, Injections, Ampicillin pharmacology, Drugs, Chinese Herbal chemistry
- Abstract
The lack of rationality evaluation method for drug combination has long restricted its clinical application. In view of this, this study took Shuanghuanglian Injection as model drug and established a "physical-chemical-biological" sequential analysis method, which is expected to provide clues for improving the safety and effectiveness of clinical drug combination. With the methods of insoluble particle testing, isothermal titration calorimetry(ITC), and real time cellular analysis(RTCA), the rationality of Shuanghuanglian Injection combined with Ampicillin Sodium for Injection was assessed. The results showed that the number of insoluble particles>10 μm in the solution of the combination met the standard of Chinese Pharmacopoeia, while the number of insoluble particles>25 μm did not meet the standard. ITC detection demonstrated that the change of Gibbs free energy(ΔG) was less than 0 during the fusion process, indicating that the process was spontaneous and enthalpy-driven reaction. Therefore, the interaction between the two was mainly chemical reaction, and the internal substances may change. RTCA found that Shuanghuanglian Injection alone and Ampicillin Sodium for Injection alone basically had no inhibitory effect on the growth of HEK293 T cells, while the combination of the two suppressed the growth of HEK293 T cells, suggesting that the combination was toxic to HEK293 T cells. This study showed that Shuanghuanglian Injection and Ampicillin Sodium for Injection reacted, yielding toxicity. This suggested that the two should not be combined for application. With the "physical-chemical-biological" sequential analysis, the molecular interaction of drugs was clarified. The method can be further applied for evaluating the rationality of other Chinese and western medicine injections.
- Published
- 2022
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11. [Risk factors of residual tumor in single small hepatocellular carcinoma after thermal ablation treatment].
- Author
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Han Y, Zhi WH, Fan SP, Yan D, and Xu F
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- Aged, Female, Humans, Male, Neoplasm, Residual, Retrospective Studies, Risk Factors, Treatment Outcome, Carcinoma, Hepatocellular pathology, Carcinoma, Hepatocellular surgery, Liver Neoplasms pathology, Liver Neoplasms surgery
- Abstract
Objective: To evaluate the risk factors of residual tumor after thermal ablation in patients with small hepatocellular carcinoma. Methods: This was a retrospective study recruiting 107 patients diagnosed as single hepatocellular carcinoma with maximum diameter ≤3 cm from December 2009 to August 2015 in National Cancer Center. The cohort enrolled 81 males and 26 females, including 83 patients younger than 70 years old. All patients were treated with radiofrequency ablation or microwave ablation, and evaluated by CT or MRI after 4-6 weeks compared with baseline data. Potentially related factors were analyzed such as patients' characteristics, tumor location and adjacent, ablation pattern, hepatitis B/C infection. A multivariate logistic regression analysis was conducted for the independence of risk factors. Results: Six patients (5.6%) with residual tumor was detected in the whole population of 101 cases. Univariate analysis suggested that tumor adjacent to vascular structure, poor differentiation, AFP≥200 μg/L were the risk factors of residue disease (all P <0.05). Multivariate logistic regression suggested that pathological type of poorly differentiated tumor was the only independent risk factor ( HR =2.26,95% CI 0.25-20.50, P =0.030). Conclusions: Poorly differentiated pathology is an independent predictive factor for residual disease in small hepatocellular carcinoma after thermal ablation. Such patients should be routinely followed up after operation.
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- 2022
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12. [Analysis of gene variant in an infant with succinic semialdehyde dehydrogenase deficiency].
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Yan D, Xu X, Wang X, Zhang X, Zhi X, Wang H, Zhang Y, and Shu J
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- Child, Developmental Disabilities, Humans, Infant, Mutation, Amino Acid Metabolism, Inborn Errors genetics, Succinate-Semialdehyde Dehydrogenase deficiency, Succinate-Semialdehyde Dehydrogenase genetics
- Abstract
Objective: To explore the genetic basis for a child with succinate semialdehyde dehydrogenase deficiency., Methods: Peripheral blood samples of the proband and his parents were collected and subjected to Sanger sequencing. High-throughput sequencing was used to verify the gene variants. Bioinformatic software was used to analyze the pathogenicity of the variant sites., Results: Sanger sequencing showed that the proband carried a homozygous c.1529C>T (p.S510F) variant of the ALDH5A1 gene, for which his mother was a carrier. The same variant was not detected in his father. However, high-throughput sequencing revealed that the child and his father both had a deletion of ALDH5A1 gene fragment (chr6: 24 403 265-24 566 986)., Conclusion: The c.1529C>T variant of the ALDH5A1 gene and deletion of ALDH5A1 gene fragment probably underlay the disease in the child. High-throughput sequencing can detect site variation as well as deletion of gene fragment, which has enabled genetic diagnosis and counseling for the family.
- Published
- 2022
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13. [Clinical application of the disposable incision retractor fixator in resection for papillary thyroid carcinoma].
- Author
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Ge X, Yan D, Zhang Q, and Xin Q
- Subjects
- Humans, Microsurgery, Thyroid Cancer, Papillary surgery, Thyroidectomy, Carcinoma, Papillary surgery, Thyroid Neoplasms surgery
- Abstract
Competing Interests: The authors of this article and the planning committee members and staff have no relevant financial relationships with commercial interests to disclose.
- Published
- 2021
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14. [Mechanism of Jinqi Jiangtang Tablets in treatment of pancreatic β cell dysfunction based on network pharmacology and molecular docking technology].
- Author
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Huang MY, Wang ZZ, Long JL, Yang XY, Zhang Y, and Yan D
- Subjects
- Medicine, Chinese Traditional, Molecular Docking Simulation, Tablets, Technology, Drugs, Chinese Herbal pharmacology, Insulin-Secreting Cells
- Abstract
The present study investigated the therapeutic efficacy and potential mechanism of Jinqi Jiangtang Tablets(JQJT) on pancreatic β cell dysfunction based on network pharmacology and molecular docking technology. TCMSP platform was used to retrieve the chemical components and targets of the three Chinese herbal medicines of JQJT. The genes were converted to gene symbol by the UniProt, and its intersection with targets related to pancreatic β cell function in GeneCards and CTD databases was obtained. The drugs, active components and common targets were imported into Cytoscape 3.8.2 to plot the drug-component-target network. The main effective components and targets were obtained by software analysis. The drug targets and targets related to pancreatic β cell function were imported separately into the STRING platform for the construction of protein-protein interaction(PPI) networks. The two PPI networks were merged by Cytoscape 3.8.2 and the key targets were obtained by plug-in CytoNCA. The targets obtained from drug-component-target network and PPI networks were imported into DAVID for GO analysis and KEGG enrichment analysis. AutoDock was used to carry out molecular docking of main active components and core targets and Pymol was used to plot the molecular docking diagram. The results showed that there were 371 active components and 203 targets related to JQJT and 2 523 targets related to pancreatic β cell damage, covering 136 common targets. The results revealed core targets(such as PTGS2, PTGS1, NOS2, ESR1 and RXRA) and effective key components(such as quercetin, kaempferol, luteolin, β-carotene and β-sitosterol). KEGG enrichment analysis indicated that apoptosis, inflammation, and other signaling pathways were mainly involved. Molecular docking results showed that the main active components could spontaneously bind to the targets. This study preliminarily revealed the mechanism of JQJT in improving pancreatic β cell damage through multi-component, multi-target and multi-pathway, and provided a theoretical basis for JQJT in the treatment of pancreatic β cell dysfunction.
- Published
- 2021
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15. [Non-coding RNAs in viral myocarditis].
- Author
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Hu J, Zhu Y, Yuan Q, Yan D, Li C, Guo H, and Lu L
- Subjects
- Enterovirus B, Human, Humans, Inflammation, Coxsackievirus Infections, Myocarditis genetics, Virus Diseases diagnosis, Virus Diseases genetics
- Abstract
Viral myocarditis (VMC) is a disease characterized by inflammation of myocardial cells caused by viral infection. Since the pathogenesis mechanism of VMC has not been fully elucidated, the diagnosis and treatment of this disease remains extremely challenging. Non-coding RNAs (ncRNAs) are a class of RNAs that do not encode proteins. An increasing number of studies have shown that ncRNAs are involved in regulating the occurrence and development of VMC, thus providing potential new targets for the treatment and diagnosis of VMC. This review summarizes the possible roles of ncRNAs in the pathogenesis and diagnosis of VMC revealed recently.
- Published
- 2021
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16. [Effect of intestinal flora changes on pharmacokinetics of astragaloside Ⅳ].
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Zhang Y, Yang CJ, Meng Q, Zhang L, Liu L, Zhang X, and Yan D
- Subjects
- Animals, Chromatography, High Pressure Liquid, Chromatography, Liquid, Rats, Rats, Sprague-Dawley, Reproducibility of Results, Tandem Mass Spectrometry, Triterpenes, Diabetes Mellitus, Type 2, Gastrointestinal Microbiome, Saponins
- Abstract
The effect of intestinal flora changes on the pharmacokinetics of astragaloside Ⅳ in rats with type 2 diabetes mellitus was explored in this study. The rat model in preliminary experiment was established by high-sugar and high-fat diet combined with the intraperitoneal injection of low-dose streptozotocin(STZ). Rats were divided into model group, astragaloside Ⅳ group, berberine group and combination group(five rats in each group). After two weeks of gavage, the rats' feces was taken for 16 S rRNA sequencing of intestinal flora. Pharmacokinetic experiments were performed on astragaloside Ⅳ in the four groups one day after the preliminary experiment. Plasma samples were precipitated in methanol with ginsenoside Rb_1 as an internal standard, and the plasma concentrations of astragaloside Ⅳ at different time points were determined by UPLC-MS/MS. The chromatographic separation was performed on a Waters Acquity UPLC BEH-C_(18) column(2.1 mm×100 mm, 1.7 μm) via gradient elution. The mobile phase was acetonitrile(A) and 5 mmol·L~(-1) ammonium formate solution with 0.2% formic acid(B). The flow rate was 0.4 mL·min~(-1), the injection volume 5 μL and the column temperature 40 ℃. The mass spectrometry was carried out with electrospray ionization source(ESI) in multiple reaction monitoring and positive ion modes. The specificity, linearity range, accuracy, precision, stability and dilution effect of the method all met the requirements for the determination of astragaloside Ⅳ in plasma. Plasma concentration-time curves were plotted and relevant pharmacokinetic parameters were calculated by DAS 3.2.8. The results showed that the concentration of absorbed astragaloside Ⅳ increased within 0-3.95 h and began to decline since 3.95 h. After 36 h, the metabolism was complete. The area under the plasma concentration-time curve(AUC_(0-t)) and the peak concentration(C_(max)) of astragaloside Ⅳ were increased in the three administration groups compared with the model group, but without significant difference, which suggested that the pharmacokinetic characteristics of saponin components would not necessarily change after the drug-induced alteration of intestinal flora.
- Published
- 2021
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17. [Exploration on rationality evaluation approach of drug combination medication based on sequential analysis and machine learning].
- Author
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Wang ZZ, Liu S, Li JL, Wang XF, Wang AT, Deng KJ, Lin H, and Yan D
- Subjects
- Drug Combinations, Technology, Artificial Intelligence, Machine Learning
- Abstract
Drug combination is a common clinical phenomenon. However, the scientific implementation of drug combination is li-mited by the weak rational evaluation that reflects its clinical characteristics. In order to break through the limitations of existing evaluation tools, examining drug-to-drug and drug-to-target action characteristics is proposed from the physical, chemical and biological perspectives, combining clinical multicenter case resources, domestic and international drug interaction public facilities with the aim of discovering the common rules of drug combination. Machine learning technology is employed to build a system for evaluating and predicting the rationality of clinical drug combinations based on "drug characteristics-repository information-artificial intelligence" strategy, which will be debugged and validated in multi-center clinical practice, with a view to providing new ideas and technical references for the safety and efficacy of clinical drug use.
- Published
- 2021
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18. [Progress in interferon: A treatment of Behcet syndrome].
- Author
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Yan D and Zheng WJ
- Subjects
- Glucocorticoids, Humans, Immunosuppressive Agents, Behcet Syndrome drug therapy, Uveitis, Venous Thrombosis
- Abstract
Behcet syndrome (BS) is a chronic systemic inflammatory disorder involving vessels of all sizes, characterized by relapsing episodes of oral and/or genital ulcers, as well as skin lesions. Ocular, vascular, gastrointestinal, neurological system involvement can cause significant morbidity and mortality. Glucocorticoids and immunosuppressants are the cornerstones for the management of BS. Biologic agents has been recommended for severe and/or refractory BS. Interferon-α (IFN-α) had multiple biological effects, such as antiviral and antiproliferative, that could regulate both innate and adaptive immunity in BS. Growing evidence showed the efficacy of IFN-α in severe and/or refractory BS. Many studies have demonstrated that IFN-α has comparable effectiveness and tolerance profiles as anti-tumor necrosis factor (TNF) agents for Behcet's uveitis with a much lower cost and steroid-and immunosuppressant-sparing effects. IFN-α has been recommended as second-line therapy for ocular involvement of BS in EULAR (The European League Against Rheumatism) 2018. IFN-α also improves mucocutaneous lesions in BS with the dosage from 3 to 9-12 million IU three times per week. A few cases indicated the therapeutic potential of IFN-α in intestinal BS. As a new trial of IFN-α in vascular BS (VBS), a recent study revealed the lower relapse rate and higher recanalization rate with IFN-α in lower extremity deep vein thrombosis (DVT). Another two case reports presented the efficacy of IFN-α in pulmonary artery involvement in BS. Also, case reports have shown successful treatment in refractory neurological involvement. There are two subtypes of IFN-α commonly used in autoimmune diseases, named IFN-α2a and IFN-α2b. IFN-α2a seemed more effective than IFN-α2b, especially in ocular and mucocutaneous involvement of BS. Side effects of IFN-α are dose-dependent and not severe. The most frequent side effects are flu-like syndrome, mild leukopenia and alopecia. Considering the potential risk of tuberculosis (TB) and hepatitis B virus (HBV) reactivation of TNF-α inhibitors, IFN-α is safe due to its anti-HBV effect and protective effect on TB. In conclusion, IFN-α is a promising choice for severe and/or refractory BS patients, especially for those who are intolerant or contraindicant to other biological agents, such as TNF inhibitors. Further prospective controlled studies are warranted to confirm the efficacy and safety of IFN-α in BS.
- Published
- 2020
19. [Study on the effect of direct anti-human globulin test positive strength on patients' red blood cell transfusion].
- Author
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Chen LF, Zhuang JM, Zhang JR, Liu X, Zhang L, and Yan D
- Subjects
- Bilirubin, Coombs Test, Humans, Retrospective Studies, Blood Transfusion, Erythrocyte Transfusion
- Abstract
Objective: To investigate the effect of direct antiglobulin test (DAT) positive strength on the clinical effect of red blood cell transfusion. Methods: The clinical data was collected on blood transfusion compatibility test and clinical transfusion of patients who underwent DAT testing from January 2015 to March 2019 in the Department of Blood Transfusion, Beijing Shijitan Hospital affiliated to Capital Medical University. A retrospective cohort study method was used to analyze the correlation between the DAT positive strength and the blood match results, irregular antibody test results, bilirubin value after blood transfusion, and red blood cell transfusion effect. Results: According to the blood matching test results, the minor cross-matching results were significantly correlated with the DAT strength ( r= 0.58, P< 0.01). The DAT strength of the antibody-screening positive patients was greater (χ(2)=126.810, P< 0.01). DAT-positive strength influences the direct bilirubin, the higher the DAT-positive strength, the higher the direct bilirubin concentration of the patients (χ(2)=32.069, P< 0.01). DAT-positive strength also had an effect on patients' total bilirubin value (χ(2)=17.981, P= 0.001). From the effect of red blood cell transfusion, patients with a DAT positive strength of 0.5 had a lower effective rate of transfusion (28.6%). The remaining DAT strength had no relation to the effect of red blood cell transfusion, and the efficiency of blood transfusion in patients with different DAT-positive strengths (1, 2, 3, 4) was 57.0%, 60.1%, 65.6% and 60.0%, respectively. With the same DAT strength, the patient's transfusion efficiency was higher (χ(2)=41.071, P= 0.009). Conclusion: Different DAT-positive strengths are correlated with the patient's minor cross-match results and bilirubin content, while the effect of red blood cell transfusion has no significant correlation with DAT-positive strength. However, with the increase of DAT positive strength, patients are more likely to have irregular antibodies.
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- 2020
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20. [Study on mechanism of Guilu Erxianjiao in treatment of post-traumatic stress disorder based on network pharmacology].
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Li L, Chen J, Wang HZ, Wang YN, Wu LL, Yan D, and Yan C
- Subjects
- Humans, Medicine, Chinese Traditional, Molecular Docking Simulation, Protein Interaction Maps, Drugs, Chinese Herbal, Stress Disorders, Post-Traumatic
- Abstract
The aim of this paper was to predict the multi-compound, multi-target and multi-pathway mechanism of Guilu Erxianjiao in treating post-traumatic stress disorder(PTSD) based on network pharmacology. Active compounds and corresponding targets of Guilu Erxianjiao were obtained from TCMSP, BATMAN-TCM, Chemistry and DrugBank database, and known therapeutic targets of PTSD were obtained from OMIM, TTD and DisGeNET Database. The protein interaction network of compound-disease was then built by combining with the STRING Database. Topological parameters of the network were analyzed by Cytoscape 3.6.0 to get key active compounds and their targets. The GO biological process analysis and KEGG pathway analysis of the key targets were conducted. Based on the results of KEGG, the "compound-target-pathway" network was built by Cytoscape 3.6.0 and the results were verified by SystemsDock online molecular docking tool. The prediction results showed that there were 67 active compounds and 420 targets for Guilu Erxianjiao, and 206 known PTSD-related therapeutic targets. Besides, 66 targets, 58 terms and 22 pathways were obtained from Cytoscape 3.6.0 topological parameters analysis, GO biological process analysis, and KEGG pathway analysis, respectively. Molecular docking results showed that both target with the maximum degree value and common targets of PTSD and Guilu Erxianjiao in the pathway can be effectively combined with their corresponding active compounds through molecular docking. The results suggested that Guilu Erxianjiao could exert anti-PTSD effect by regulating synaptic plasticity, anti-apoptotic, anti-inflammatory and promoting fear memory extinction through pathways such as LTP, PI3 K/Akt/mTOR, TNF, serotonergic synapse and dopaminergic synapse. This study provides a theoretical basis for further elucidating pharmacological mechanisms of Guilu Erxianjiao in treating PTSD.
- Published
- 2020
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21. [Genetic analysis of a case of mosaic trisomy 21 associated with autism spectrum disorder].
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Yan D, Zhao Y, Wang Z, Yin T, Yang S, Tang X, and Wang L
- Subjects
- Child, Chromosomes, Human, Pair 21, DNA Copy Number Variations, Humans, Autism Spectrum Disorder, Mosaicism, Trisomy, Uniparental Disomy
- Abstract
Objective: To explore the genetic basis for a child with autism spectrum disorder (ASD) and congenital heart disease., Methods: G-banded chromosomal karyotyping was carried out for the patient and his parents. The child was also subjected to whole exome sequencing (WES) and low-coverage massively parallel copy number variation sequencing (CNV-seq). The result was validated by chromosomal microarray analysis (CMA)., Results: The karyotype of the patient and his parents were normal. No significant genetic variation was found by WES. However, CNV-seq has discovered a 47, XY, +21 [10%]/46,XY [90%] mosaicism in the patient. The result was confirmed by CMA., Conclusion: In addition to Down syndrome, low proportion mosaic trisomy 21 is also associated with ASD. WES and CNV-seq can enable accurate diagnosis for patient with unexplained ASD.
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- 2020
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22. [Cognitive ability to mental disorders among medical workers in ear-nose-throat departments and its impact on doctor-patient relationship].
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Tu Y, Chou Y, Liu B, Liu J, Yan D, and Zhang Y
- Subjects
- Adaptation, Psychological, Cognition, Humans, Nose, Pharynx, Physician-Patient Relations
- Abstract
Objective: To investigate the cognitive ability and coping strategy to mental disorders among medical workers in ear-nose-throat departments and its impact on doctor-patient relationship. Methods: A total of 78 medical workers (including doctors, nurses, and technicians) in ear-nose-throat departments from 10 general hospitals in Hunan Province were investigated by self-compiled questionnaire on the perspective and coping strategy to mental disorders among medical workers. Results: Mental disorders except depression and schizophrenia were poorly understood in respondents, and many of their coping strategies were inappropriate. Furthermore, subjects tend to avoid too much contact with psychiatric patients for being afraid of the mental disorders. The poorer understanding of mental disorders, the more inappropriate coping strategies in dealing with mental disorders (P<0.001). Moreover, there was a significant difference in inappropriate coping strategies to mental disorders between patients being abused and patients not being abused (P=0.017). Factors such as education background (P=0.031) and the hospital level (P=0.038) also impacted the coping strategies to mental disorders. Conclusion: Among all mental disorders, only depression and schizophrenia are coped with the right way in medical workers of ear-nose-throat departments. In addition, obviously negative attitude and avoidance are found in dealing with mental disorders by medical workers. Importantly, poor cognitive ability to mental disorders is the main reason for hurting doctor-patient relationship in the ear-nose-throat departments.
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- 2019
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23. [Investigation on human intestinal parasitic diseases in ecological regions of Qinba Mountains in Henan Province in 2015].
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Rui-Min Z, Su-Hua L, Ya-Lan Z, Yan D, Wei-Qi C, Cheng-Yun Y, Ying L, Dan Q, Yu-Ling Z, Xi-Meng L, Hong-Wei Z, and Bian-Li X
- Subjects
- Animals, Child, Child, Preschool, China epidemiology, Feces parasitology, Female, Helminthiasis epidemiology, Helminthiasis parasitology, Helminthiasis prevention & control, Humans, Infant, Male, Prevalence, Risk Factors, Socioeconomic Factors, Intestinal Diseases, Parasitic epidemiology, Intestinal Diseases, Parasitic parasitology, Intestinal Diseases, Parasitic prevention & control
- Abstract
Objective: To understand and analyze the epidemic status of human intestinal parasitic diseases in the ecological region of the Qinba Mountains in Henan Province, so as to provide the evidence for the control of the diseases in this region., Methods: According to the methods of National Survey Scheme on Major Human Parasitic Diseases , 26 survey spots were selected in 8 counties (cities) in ecological regions of Qinba Mountains in Henan Province in 2015. After collecting the human fecal samples, the eggs of intestinal helminthes were detected with the modified Kato-Katz thick smear method, the species of Ancylostoma of the hookworm egg-positive samples were identified with the tube fecal culture method, the eggs of Enterobius vermicularis were detected by using the adhesive tape method in children aged 3 to 6 years, and the cyst and trophozoite of intestinal protozoa were examined by iodine staining. The infections of intestinal parasites in different populations and the related influencing factors were analyzed., Results: Totally 6 706 residents were recruited in this study, 8 kinds of parasites were found including 3 species of helminthes and 5 species of protozoans. The overall infection rate of intestinal parasites was 3.39%, covering 2.92% for helminthes and 0.49% for protozoans. The infection rate of E. vermicularis in children aged 3 to 6 years was 3.93%. The 3 identified helminthes were Ascaris lumbricoides , E. vermicularis , and Dicrocoelium dendriticum , with the highest infection rate of E. vermicularis (2.68%, χ
2 = 306.362, P < 0.05). The 5 identified protozoans were Entamoeba hartmani , E. coli, Endolimax nana, Giardia lamblia , and Blastocystis hominis , and the infection rate of E. nana was the highest ( χ2 = 23.842, P < 0.05). Among the 8 counties (cities), the highest infection rate of helminthes, mainly with Enterobius infection, existed in Ruyang County, and the infection rate of protozoans in Xin'an County was the highest, mainly with E. nana infection. There was a significant difference in the infection rates of helminthes and protozoans among the 8 counties (cities) (helminthes: χ2 = 357.525, P < 0.05; protozoans: χ2 = 38.795, P < 0.05). There was no significant difference in the helminth infection rate between males and females ( χ2 = 0.034, P > 0.05), but the protozoan infection rate of the males was higher than that of the females ( χ2 = 12.946, P < 0.05). The helminth infection rate of the 0-9 years old group was the highest ( χ2 = 62.600, P < 0.05), up to 6.60%, mainly with E. vermicularis infection. There was no significant difference in the infection rate of intestinal parasites among nationalities ( χ2 = 0.212, P > 0.05). The helminth infection rate of preschool children was the highest and up to 8.43%, mainly with E. vermicularis infection. The infection of A. lumbricoides was mainly happened among farmers, with the infection rate of 0.31%. There was a significant difference in the helminth infection rate among different occupations ( χ2 = 84.333, P < 0.05). The intestinal parasites infection rate of the illiterate population was the highest and up to 7.63%, there was a significant difference among the populations with different educational levels ( χ2 = 72.013, P < 0.05). The helminth infection rate of plain areas was higher than that of valley and hill ( χ2 = 11.690, P < 0.05). The helminth infection rate of people with low-income was the highest and up to 10.32% ( χ2 = 244.999, P < 0.05). The protozoan infection rate of people with middle-income was the highest, who had the annual per capita net income of 6 000 to 7 999 Yuan ( χ2 = 24.749, P < 0.05). The helminth infection rate of people drinking well water was much higher than that of people drinking tap water ( χ2 = 62.255, P < 0.05). The protozoan infection rate of people without insect repellent was higher than that of people with insect repellent ( χ2 = 5.235, P < 0.05)., Conclusions: The infection rates of human intestinal parasites in the ecological region of the Qinba Mountains in Henan Province have decreased sharply. E. vermicularis infection in children should be the main point of prevention and treatment of parasitic diseases in the future.- Published
- 2019
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24. [Inhibition effect of biocontrol bacteria NJ13 and its mixture with chemical fungicides against ginseng root rot caused by Fusarium solani].
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Chen CQ, Yan D, Jiang Y, Xu P, Chu YX, and Gao J
- Subjects
- Plant Roots microbiology, Bacteria, Biological Control Agents, Fungicides, Industrial, Fusarium pathogenicity, Panax microbiology
- Abstract
This study was aimed to clarify the toxicity indoor and inhibition effect of biocontrol strain NJ13 and its mixture with chemical fungicides against Fusarium solani causing ginseng root rot. The method of mycelial growth rate and Sun Yunpei method were used to determine the indoor toxicity and co-toxicity coefficient of strain NJ13 and their mixture with chemical pesticides against F. solani. The dual culture assay method,mixed culture method and microscopic observation were used to determine the sporulation and germination of spores and mycelial growth and morphological change of hyphae of F. solani treated by strain NJ13. The results of toxicity indoor showed that strain NJ13 had the best inhibitory effect on pathogen,and its EC_(50) value was 0. 071 mg·L~(-1). It was all synergistic for antifungal effect that strain NJ13 was mixed with propiconazole and difenoconazole respectively with a range from 1 ∶4 to 4 ∶1( volume ratio). Both of optimal ratios were 1 ∶1,and the co-toxicity coefficients were 848. 70 and 859. 73,respectively. The strain NJ13 could inhibit the sporulation,germination and mycelial growth of F. solani. The biocontrol strain NJ13 had an inhibition effect on F. solani,and the optimal antifungal ratio of strain NJ13 mixed with propiconazole and difenoconazole was obtained.
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- 2019
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25. [A Meta-Analysis of Efficacy and Adverse Effects of Lobaplatin and Cisplatin in the Treatment of Malignant Pleural Effusion].
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Min S, Zheng Q, Zhang B, Yan D, Wang R, Qu Z, Li L, Liu J, and Zhou Q
- Subjects
- Antineoplastic Agents therapeutic use, Cisplatin therapeutic use, Cyclobutanes therapeutic use, Humans, Organoplatinum Compounds therapeutic use, Randomized Controlled Trials as Topic, Antineoplastic Agents adverse effects, Cisplatin adverse effects, Cyclobutanes adverse effects, Organoplatinum Compounds adverse effects, Pleural Effusion, Malignant drug therapy
- Abstract
Background: The aim of this study is to systematically evaluate the efficacy and adverse effects of Lobaplatin and Cisplatin in the treatment of malignant pleural effusion., Methods: The databases of Medline (PubMed), Embase, Web of Science, Cochrane, Wanfang, CNKI and VIP were retrieved so as to search the studies about the randomized controlled clinical trials (RCT) that compared the Lobaplatin and Cisplatin for malignant pleural effusion. The main outcome indicators include objective response rate, complete response, partial response, nephrotoxicity, chest pain, gastrointestinal reaction, myelosuppression, fever response and hepatotoxicity. Relative risk was used as the effect size, which was expressed as 95% confidence interval. The meta-analysis was performed using Stata 14.0 statistical software., Results: A total of 12 RCTs and 720 MPE patients were included. The results showed that the ORR (RR=1.27, 95%CI: 1.15-1.40, P<0.001), CR (RR=1.39, 95%CI: 1.09-1.78, P=0.007), PR (RR=1.21, 95%CI: 1.02-1.42, P=0.026) in LBP thoracic perfusion chemotherapy were significantly higher than those in DDP thoracic perfusion chemotherapy. The incidence of nephrotoxicity (RR=0.31, 95%CI: 0.13-0.71, P=0.005) and gastrointestinal reactions (RR=0.44, 95%CI: 0.31-0.62, P<0.001) in the LBP group were significantly lower than those in DDP group., Conclusions: Compared with DDP pleural perfusion chemotherapy, the ORR, CR and PR of LBP pleural perfusion chemotherapy for MPE are significantly better than DDP, and its nephrotoxicity and gastrointestinal reactions are remarkably lower than DDP.
- Published
- 2019
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26. [Bio-characteristic profiling related to clinic:thought and practice on quality evaluation of Chinese materia medica].
- Author
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Yan D
- Subjects
- Animals, Materia Medica standards, Medicine, Chinese Traditional standards
- Abstract
The quality evaluation of Chinese materia medica(CMM) is an important and difficult topic research in traditional Chinese medicine, due to its inherent complexity, and incompatibility of evaluation patterns and their key techniques. To solve the issue, it is necessary to break the limit of conventional evaluation, and establish the evaluation pattern and its key techniques about CMM quality related to clinic. Hence, with the strategy- "originating from clinic, validating by experiments and returning to clinic", a novel academic concept is proposed which is termed as "bio-characteristic profiling related to clinic of CMM". A series of key techniques should be established including living-cell dynamic monitoring, enzyme bioactivity dynamic monitoring, electric chemistry dynamic monitoring and isothermal titration dynamic monitoring, etc. Besides, the quality fluctuation of CMM(products) which is hard to control and assess could be evaluated when associated with clinical efficacy and safety(exemplified by Chinese herbal injection, animal medicine and joint use of drugs in clinic). It is expected to form the novel evaluation system for CMM quality based on bio-characteristic profiling related to clinic and its key techniques, which provides novel ideas and techniques for improving quality and clinical efficacy, and promotes the modernization and internationalization of CMM.
- Published
- 2019
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27. [Effects of dexmedetomidine on the growth and development of rat hippocampal neurons and its mechanism].
- Author
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Liu YX and Yan D
- Subjects
- Animals, Brain-Derived Neurotrophic Factor, Growth and Development, Rats, Dexmedetomidine pharmacology, Hippocampus drug effects, Hippocampus growth & development, Hypnotics and Sedatives pharmacology, Neurons drug effects
- Abstract
Objective: To investigate the effects of dexmedetomidine (DEX) on hippocampal neuron development process and the expressions of molecules in brain-derived neurotropic factor (BDNF)-tyrosine receptor kinase B (TrkB) signaling pathway in neonatal rats., Methods: The hippocampal neurons were isolated from neonatal rats and cultured in vitro. The cells were seeded in 96-well plates,which were divided into 4 groups (control group, 1 μmol/L DEX treatment group, 5 μmol/L DEX treatment group, 50 μmol/L DEX treatment group), six wells were set in each group, and different concentrations of dexmedetomidine 1, 5 and 50 μmol/L were administered respectively. Cell viability was detected at 2, 4, 6, 8, and 10 d after treatment, and apoptosis was detected 10 days after treatment. The mRNA expression levels of synaptophysin (SYN) and postsynaptic density protein 95 (PSD95) were detected by q-PCR, and the expressions of BDNF, TrkB and N-methyl-D-aspartate receptor (NMDAR) protein were analyzed., Results: Compared with the control group, there was no significant difference in neuronal cell viability between the different doses of DEX treatment group. There was no significant difference in the expression of SYN and PSD95 mRNA and TrkB protein between the 1 μmol/L and 5 μmol/L DEX treatment groups (P>0.05). The expression levels of SYN and PSD95 mRNA in the 50 μmol/L DEX group were increased significantly (P<0.01), and the expression level of BDNF protein was up-regulated significantly (P<0.01), the expression of the p-N-methyl-D-aspartate receptor was increased (P<0.01)., Conclusion: 50 μmol/L DEX has a certain effect on rat hippocampal neurons, which may be achieved by up-regulating the expression of BDNF and the phosphorylation level of N-methyl-D-aspartate receptor.
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- 2019
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28. [Incidence of Lower Limb Deep Venous Thrombosis and Coagulation Status in Severe Patients after Thoracic Surgery].
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Huang Y, Wang C, Zhang Y, Ning Y, Kui L, Song L, Zhi X, Yan D, and Ji X
- Subjects
- Adult, Aged, Aged, 80 and over, Female, Humans, Incidence, Lung Neoplasms surgery, Male, Middle Aged, Retrospective Studies, Young Adult, Blood Coagulation, Lower Extremity blood supply, Thoracic Surgical Procedures adverse effects, Venous Thrombosis etiology, Venous Thrombosis physiopathology
- Abstract
Background: The aim of this study was to analyze the incidence of lower limb deep venous thrombosis (DVT) and the corresponding coagulation status in severe patients after thoracic surgery., Methods: Severe patients after thoracic surgery who received mechanical prophylaxis of lower limb DVT between July 2016 and June 2018 were analysed retrospectively. Their general information, disease species, surgical treatment, and coagulation index were reviewed., Results: Fifty patients were finally included. There were 34 male and 16 female, aging from 22 to 80 years. The incidence of DVT was 22.0%, all of them were isolated calf DVT. The incidence was 29.4% in male patients, while 6.3% in female; 23.5% in malignant diseases and 18.6% in benign. All coagulation index presented no statistical difference between patients with and without DVT, except activated partial thromboplastin time (APTT)., Conclusions: Even on the basis of adequate mechanical prophylaxis, lower limb DVT is common in severe patients after thoracic surgery. Meanwhile, male patients and malignant diseases are more suscepted.
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- 2018
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29. [Exploring research ideas of mechanism of dominant diseases in traditional Chinese medicine based on evidence-based medicine].
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Yan D, Liu J, Wang AT, Yang ZR, Yue SJ, and Feng XZ
- Subjects
- Animals, Evidence-Based Medicine, Drugs, Chinese Herbal, Medicine, Chinese Traditional
- Abstract
The prescription of clinical curative effect has promoted the formation and development of the dominant diseases in traditional Chinese medicine, but it has been controversial for a long time because its mechanism has not been effectively explained. Breaking the gap between animal/cell research and clinical research, and understanding the mechanism of dominant diseases in traditional Chinese medicine based on evidence-based medicine has become an important breakthrough in this scientific issue. Therefore, based on evidence-based medicine, we established the research concept that "originating from clinic, testing in experiment, returning to clinic". Taking the classic formula (Jinqi Jiangtang formula) treating diabetes as an example to find characteristic markers of diabetes supported by evidence-based medicine from clinic. We used the reverse analysis strategy of the response of characteristic markers to explore the intervention mechanism of Jinqi Jiangtang formula on characteristic markers. Then, we verified the key signaling molecules of the metabolic regulation of the Jinqi Jiangtang formula in clinic. The research ideas and key technologies for the mechanism of treatment of diabetes by Jinqi Jiangtang formula based on evidence-based medicine are formed, and it is expected to provide research reference for explaining the mechanism of dominant diseases in traditional Chinese medicine based on evidence-based medicine., Competing Interests: The authors of this article and the planning committee members and staff have no relevant financial relationships with commercial interests to disclose., (Copyright© by the Chinese Pharmaceutical Association.)
- Published
- 2018
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30. [Expert consensus on prescription comment of Chinese traditional patent medicine for promoting the rational use of drugs in Beijing].
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Jin R, Zhao KJ, Guo GM, Zhang B, Wang YG, Xue CM, Yang YH, Wang LX, Li GH, Tang JF, Nie LX, Zhang XL, Zhao TT, Zhang Y, Yan C, Yuan SZ, Sun LL, Feng XZ, and Yan D
- Subjects
- Beijing, Consensus, Prescriptions, Drugs, Chinese Herbal, Medicine, Chinese Traditional, Nonprescription Drugs
- Abstract
With the growth of number of Chinese patent medicines and clinical use, the rational use of Chinese medicine is becoming more and more serious. Due to the complexity of Chinese medicine theory and the uncertainty of clinical application, the prescription review of Chinese patent medicine always relied on experience in their respective, leading to the uncontrolled of clinical rational use. According to the traditional Chinese medicine (TCM) theory and characteristics of the unique clinical therapeutics, based on the practice experience and expertise comments, our paper formed the expert consensus on the prescription review of Chinese traditional patent medicine for promoting the rational use of drugs in Beijing. The objective, methods and key points of prescription review of Chinese patent medicine, were included in this expert consensus, in order to regulate the behavior of prescription and promote rational drug use., Competing Interests: The authors of this article and the planning committee members and staff have no relevant financial relationships with commercial interests to disclose., (Copyright© by the Chinese Pharmaceutical Association.)
- Published
- 2018
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31. [Current situation of human resources of parasitic disease control and prevention organizations in Henan Province].
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Ya-Lan Z, Yan-Kun Z, Wei-Qi C, Yan D, and Peng L
- Subjects
- China, Humans, Surveys and Questionnaires, Workforce, Health Personnel, Parasitic Diseases prevention & control, Public Health
- Abstract
Objective: To understand the current status of human resources of parasitic disease control and prevention organizations in Henan Province, so as to provide the reference for promoting the integrative ability of the prevention and control of parasitic diseases in Henan Province., Methods: The questionnaires were designed and the method of census was adopted. The information, such as the amounts, majors, education background, technical titles, working years, and turnover in each parasitic disease control and prevention organization was collected by the centers for disease control and prevention (CDCs) at all levels. The data were descriptively analyzed., Results: Totally 179 CDCs were investigated, in which only 19.0% (34/179) had the independent parasitic diseases control institution (department) . There were only 258 full-time staffs working on parasitic disease control and prevention in the whole province, in which only 61.9% (159/258) were health professionals. Those with junior college degree or below in the health professionals accounted for 60.3% (96/159) . Most of them (42.1%) had over 20 years of experience, but 57.9% (92/159) of their technical post titles were at primary level or below., Conclusions: The proportion of the health professionals is low in the parasitic disease control and prevention organizations in Henan Province. The human resource construction for parasitic disease control and prevention at all levels should be strengthened.
- Published
- 2018
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32. [Electrical properties tomography based on radio frequency for human breast imaging].
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Li H, Yan D, and Liu H
- Abstract
Through magnetic resonance electrical properties tomography (MR-EPT), electrical conductivity and permittivity of biological tissues could be reconstructed based on radio frequency field of magnetic resonance imaging (MRI) system. High precision and high resolution image could be obtained without current injection. In this study, XFDTD software was used to establish a finite element model of the human breast. Simulation was delivered at the Larmor frequency of 128 MHz by a 16-channel radio frequency coil. Conductivity and permittivity of the mammary tissue was reconstructed according to the B
1 + field's amplitude and phase of forward problem. Anti-noise performance of the algorithm was studied by adding noise to B1 + field. The conductivity and permittivity's average relative error between simulation results and dielectric constant was 4.71% and 11.32%, respectively. With a signal-to-noise ratio of >30 dB, the noise added would not affect imaging results. This study demonstrated that high precision and high resolution image could be obtained by MR-EPT without excitation. MR-EPT had excellent feasibility and developing potential in early detection of diseases.- Published
- 2017
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33. [Monitoring results of soil-transmitted nematodiasis in national surveillance site of Huaiyang County in Henan Province, 2006-2015].
- Author
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Wei-Qi C, Ya-Lan Z, Su-Hua L, Yan D, Bian-Li X, and Hong-Wei Z
- Subjects
- Ancylostomatoidea, Animals, Ascaris lumbricoides, Child, Child, Preschool, China epidemiology, Enterobius, Humans, Parasite Egg Count, Prevalence, Trichostrongylus, Trichuris, Nematode Infections epidemiology, Soil parasitology
- Abstract
Objective: To understand the epidemic situation of soil-transmitted nematodiasis in the national surveillance site in Henan Province., Methods: Over 1 000 fecal samples from inhabitants in Huaiyang County of Henan Province, which was a national surveillance site, were collected each year from 2006 to 2015, the eggs of soil-transmitted nematodes and other intestinal helminths were examined by Kato-Kats technique. The cellophane swab method was used to detect Enterobius vermicularis eggs in children aged 3 to 12 years. In addition, the soil samples were collected from vegetable fields, lavatories, courtyards and kitchens of 10 families randomly selected in each year to examine Ascaris eggs by a modified saturated sodium nitrate floatation method., Results: From 2006 to 2015, 10 419 persons were investigated, and the eggs of five species of intestinal helminths, Ascaris lumbricoides , Trichuris trichiura , hookworm, E. vermicularis , and Trichostrongylus orientalis , were detected, The average infection rate of soil-transmitted nematodes in residents in Huaiyang County was 3.69%. The intensity of infection was mild and a family clustering was obvious. Both the infection rates of E. vermicularis in children and soil-transmitted nematodes in villagers had no significant differences between different genders (both P >0.05). The infection rates of soil-transmitted nematodes, A. lumbricoides and E. vermicularis all reached the highest in the age group of 1-10 years. For different education back-ground, the people with primary school education had the highest infection rate, and the infection rate showed a decreasing trend with the increase of the educational level. The infection rate of soil-transmitted nematodes in the national surveillance site in Henan Province showed a decreasing trend from 2006 to 2015. Unfertilized and fertilized A. lumbricoides eggs were detected in the soil samples, but the positive rate was very low., Conclusions: In the recent 10 years, the infection rate of soil-transmitted nematodes in the national surveillance site in Henan Province shows a decreasing trend and maintains at a low level. The infection shows a family clustering. The children, especially those aged 3-9 years are the main infected population, and E. vermicularis infection is the key point of prevention and control.
- Published
- 2017
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34. [Survey and analysis of epidemic status of principal human parasitosis in ecological region of Huaiyang hills of Henan Province in 2015].
- Author
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Ya-Lan Z, Yan-Kun Z, Wei-Qi C, Yan D, Xi-Meng L, Peng L, and Hong-Wei Z
- Subjects
- Ancylostomatoidea, Animals, Ascaris lumbricoides, Blastocystis hominis, Child, Child, Preschool, China epidemiology, Feces, Humans, Prevalence, Surveys and Questionnaires, Helminthiasis epidemiology, Intestinal Diseases, Parasitic epidemiology, Protozoan Infections epidemiology
- Abstract
Objective: To understand the epidemic status of principal human parasitosis in the ecological region of Huaiyang hills of Henan Province., Methods: According to the scheme of The 3rd National Survey of Principal Human Parasites made by National Institute of Parasitic Diseases, the survey was performed based on the ecological regions. The stratified cluster sampling was made combined with the economic and geographical conditions. The infections of intestinal helminths and protozoans in permanent residents were respectively detected by Kato-Kats technique and iodine solution. Trichuris trichiura infection was detected by the cellophane swab method in children aged 3 to 6 years., Results: Totally 6 710 residents in 26 survey spots from 9 counties were detected, in which 528 children aged 3 to 6 years were detected for T. trichiura infection. Eleven kinds of parasites were found in this survey, including 5 species of helminthes and 6 species of protozoans. The infection rates of overall parasites, helminthes and protozoans were respectively 1.65%, 1.07% and 0.61%. The infection rate of T. trichiura in the children aged 3 to 6 years was 3.79%. Only 0.10 percent of the infections were co-infection, and all were infected by 2 kinds of parasites. The principal parasites in this district were Ascaris lumbricoides (0.31%), Blastocystis hominis (0.28%) and hookworm (0.27%). The T. trichiura infection rate among children was 3.79% by the cellophane swab method. The infections of protozoans were found in all age groups. In the group aged 9 years and below, the maximum kinds of parasites were found., Conclusions: The infection rates of principal human parasites in Huaiyang hilly ecological region of Henan have decreased sharply, but more efforts still should be paid on the prevention and control of parasitosis in children.
- Published
- 2017
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35. [Establishing the acupuncture-moxibustion clinical trial registry and improving the transparence of clinical trials of acupuncture and moxibustion].
- Author
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Liu Y, He L, Liu J, Yang X, Yan D, Wang X, Luo L, Li H, Yan S, Wen T, Bai W, Wu T, and Liu B
- Subjects
- China, Humans, Moxibustion standards, Acupuncture Therapy standards, Clinical Trials as Topic standards, Registries
- Abstract
As a kind of intervention measures of traditional Chinese medicine, acupuncture-moxibustion is highly adopted on global clinical practice. Even though the global clinical trial registration system was established more than 10 years ago, the proportion of acupuncture-moxibustion clinical trial registration is still very low; and it is very problematic on the methodological quality and report quality in the published acupuncture-moxibustion clinical trials. In order to manage particularly the acupuncture-moxibustion clinical trials, China Academy of Chinese Medical Sciences, collaborated with China Association of Acupuncture and Moxibustion and World Federation of Acupuncture Societies, established the Acupuncture-Moxibustion Clinical Trail Registry (AMCTR). AMCTR is a secondary registry platform affiliated to the Chinese Clinical Trial Registry (ChiCTR) and WHO International Clinical Trials Registry Platform (ICTRP), specifically for the acceptance and management of clinical trials in the field of acupuncture and moxibustion. It is a nonprofit academic organization, located in China Academy of Chinese Medical Sciences.
- Published
- 2017
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36. [Time characteristics of imported malaria cases in Yunnan Province].
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Xiang-Hua M, Yan D, Ying D, Meng-Ni C, Yan-Chun XU, Chun W, and Ye-Rong T
- Subjects
- China epidemiology, Epidemics, Forecasting, Seasons, Time Factors, Malaria epidemiology
- Abstract
Objective To investigate the time distribution characteristics and the epidemic trends of imported malaria cases in Yunnan Province. Methods The malaria case records and epidemiological history data of Yunnan Province were collected, and the local infection cases were excluded. The data were statistical analyzed. Results The imported malaria cases had a significantly seasonal periodicity ( Q = 26.574, P < 0.05) and epidemic trends ( Q = 35.487, P < 0.05). The imported peak was in May, while February was the lowest month of imported cases, and the difference was significant ( Z = -2.619, P < 0.05). The simple seasonal prediction model was the best model ( R
2 = 0.677, BIC = 4.867) for forecast while the residual sequence was white noise ( Q = 14.226, P > 0.05). By using the model to predict the cases in January, February and March of 2016, the number (95% CI ) were 29 (7-50), 22 (0-44) and 31 (8-54), and the actual number of imported malaria cases were 29, 24 and 38 cases respectively and all cases were included in the 95% CI . Conclusion The imported malaria cases in Yunnan Province had a significantly seasonal periodicity and epidemic trends, and the established model has good prediction on the recent cases.- Published
- 2017
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37. [The relationship among depression, anxiety, stress and addictive substance use behavior in 5 935 secondary vocational students].
- Author
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Yu XD, Yu JC, Wu QF, Chen JY, Wang YC, Yan D, Teng SW, Zhao YT, Cao JP, Li SQ, Yan YQ, Gong J, Yao K, Zhou H, and Wang ZZ
- Subjects
- Adolescent, Alcohol Drinking, China epidemiology, Family Characteristics, Female, Health Surveys, Humans, Male, Prevalence, Risk Factors, Stress, Psychological psychology, Students statistics & numerical data, Substance-Related Disorders psychology, Surveys and Questionnaires, Vocational Education, Anxiety epidemiology, Depression epidemiology, Depression psychology, Stress, Psychological epidemiology, Students psychology, Substance-Related Disorders epidemiology
- Abstract
Objective: To investigate the relationship among depression, anxiety, stress and addictive substance use behavior in secondary vocational students. Methods: Cluster sampling method and the Adolescent Health-related Behaviors Questionnaire were used to collect demographic characteristics, psychological symptoms, and addictive substance usage among 5 935 students in nine vocational schools in Chongqing, Zhaoqing, Ningbo, and Taiyuan. Multivariate logistic regression analysis was used to analyze the relationship between the addictive substance use behavior and psychological factors. Results: The detection rates of depression, anxiety and stress were 46.5% ( n= 2 762), 58.7% ( n= 3 483), and 29.8% ( n= 1 770), respectively. The prevalence of addictive substances was 74.8% ( n =4 440), traditional drugs was 0.8% ( n= 50), new drugs was 2.8% ( n= 166), other addictive drugs was 4.1% ( n= 241). Multivariate logistic regression analysis showed that compared with the normal psychological states of secondary vocational students, the OR value of mild depression tendency alcohol and tobacco use behavior of secondary vocational students was 1.45; the OR values of mild anxiety, moderate anxiety, severe anxiety and very serious anxiety were 1.46, 1.46, 1.71, and 1.83, respectively; the traditional drugs use behaviors were 5.51, and 2.61, respectively, for the severe anxiety and very serious anxiety. Compared with the normal psychological state of secondary vocational students, the OR values of the severe anxiety and very severe anxiety were 2.56, and 2.66, respectively, for severe anxiety and very serious anxiety. Compared with normal psychological status of secondary vocational students, the OR values of mild, moderate, severe, and very severe anxiety were 2.14, 2.47, 2.39, and 3.45, respectively; all P values <0.05. Conclusion: Anxiety and mild depression were risk factors of tobacco and alcohol use in secondary vocational students; severe and above anxiety were the risk factors of drug use in secondary vocational students; anxiety was the risk factor for other addictive drug use in secondary vocational students.
- Published
- 2017
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38. [Comparative outcomes of three kinds of transforaminal interbody fusion technique in the treatment of single segment lumbar degenerative disease].
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Zhu DJ, Zou C, Yan D, Feng FB, and Li XL
- Subjects
- Fluoroscopy, Humans, Lumbosacral Region, Minimally Invasive Surgical Procedures, Pain Measurement, Pain, Postoperative, Postoperative Period, Retrospective Studies, Lumbar Vertebrae, Spinal Diseases surgery, Spinal Fusion
- Abstract
Objective: To compare the clinical outcomes among three kinds of transforaminal interbody fusion technique in the treatment of single segment lumbar degenerative disease. Methods: From October 2012 to November 2014, a total of 67 cases of lumbar degenerative disease of single segment underwent surgical intervention were retrospectively analyzed, including 19 cases by mis- transforaminal lumbar interbody fusion(TLIF), 25 cases by mini-open TLIF and 23 cases by open TLIF.Blood loss, surgical time, fluoroscopy time and hospital costs were recorded.Pre- and postoperative back pain was assessed with visual analogue scale (VAS), and lumbar function was evaluated with Oswestry disability index (ODI). Results: mis-TLIF group need more surgical time, fluoroscopy time and more hospital costs when compared to mini-open TLIF group and open TLIF group ( P <0.05), but no significant difference between mini-open TLIF group and open TLIF group ( P >0.05). mis-TLIF group tended to lose less blood than mini-open TLIF group( P <0.05), and mini-open TLIF group lose less blood than open TLIF group ( P <0.05). There is no significant difference of the change of ODI among three groups ( P >0.05). mis-TLIF group and mini-open TLIF group was superior to open TLIF group in VAS of the second day postoperative [(3.2±1.6) scale, (3.4±1.5) scale vs(5.8±1.4)scale]( P <0.05). Conclusion: mis-TLIF, mini-open TLIF and open TLIF can all get satisfactory clinical outcomes in the treatment of single segment lumbar degenerative disease.mis-TLIF and mini-open TLIF was superior to open TLIF in blood loss, early postoperative recovery.Compared with mis-TLIF, mini-open TLIF reduce the fluoroscopy time and hospital costs, and also has a shorter learning curve.
- Published
- 2016
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39. [SATB1 promotes the malignant of human non-Hodgkin lymphoma by activating the ribonucleotide reductase small subunit M2].
- Author
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Yan D and Wang W
- Subjects
- Cell Cycle Proteins genetics, Down-Regulation, Humans, Lymph Nodes chemistry, Lymphoma, Non-Hodgkin, Matrix Attachment Region Binding Proteins genetics, Oncogenes genetics, Oncogenes physiology, RNA, Messenger, RNA, Small Interfering, Ribonucleoside Diphosphate Reductase, Ribonucleotide Reductases genetics, Signal Transduction, Transcription Factors, Transcriptional Activation, Transfection, Tumor Cells, Cultured, Up-Regulation, Cell Cycle Proteins physiology, Cell Movement genetics, Cell Proliferation genetics, Gene Expression Regulation, Neoplastic genetics, Matrix Attachment Region Binding Proteins physiology, Neoplasm Invasiveness genetics, Ribonucleotide Reductases physiology
- Abstract
Objective: To explore the role of the special AT rich sequence binding protein-1 (SATB1) and ribonucleotide reductase M2 (RRM2) in enhancing malignant progression of non-Hodgkin lymphoma (NHL). Methods: A total of 42 NHL and 42 chronic lymphadenitis patients were recruited. The protein expressions of SATB1 and RRM2 in cervical lymph nodes were determined by Western blot. After overexpression of SATB1, siSATB1 or siRRM2, the mRNA levels of SATB1 and RRM2 in cells were analyzed via RT-PCR, the cell proliferation was evaluated via MTT and EdU assays, while the migration and invasion of cells were assessed by transwell assays. Results: Compared with chronic lymphadenitis, the expressions of SATB1 and RRM2 in NHL patients were up-regulated. There was positive correlation between SATB1 and RRM2 in NHL patients. RRM2 mRNA level was up-regulated after transfection of SATB1 and down-regulated after transfection of siSATB1. Overexpression of SATB1 increased tumor cell proliferation, migration and invasion, while knockdown of RRM2 reversed those phenomena. Conclusion: SATB1 functions as an oncogene and promotes tumor cell proliferation, migration and invasion by up-regulation of RRM2 in NHL.
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- 2016
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40. [Human antigen R regulates TGF-β 1 expression in airway smooth muscle cells under the stimulation of platelet-derived growth factor].
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Wang N, Yan D, Gu XM, Liu Y, and Jiang SJ
- Subjects
- Cells, Cultured, Humans, Platelet-Derived Growth Factor, RNA Interference, RNA, Messenger, Receptors, Antigen, Transforming Growth Factor beta, Transforming Growth Factor beta1, Myocytes, Smooth Muscle
- Abstract
Objective: To study the role of human antigen R (HuR) regulated transforming growth factor β
1 (TGF-β1 ) expression in airway smooth muscle cells under the stimulation of platelet-derived growth factor (PDGF). Methods: Airway smooth muscle (ASM) cells were cultured at 37 ℃ and 5% CO2 in dulbecco's modified eagle medium (DMEM) cell medium. Cells at passages between 4 and 11 were divided into different groups according to the different compounds added. For control group, no compounds were administrated. For PDGF group, cells were stimulated with PDGF (20 μg/L) and cultured for an additional time. Cells were harvested and real-time PCR was used to measure mRNA level and Western blotting to detect protein level of HuR and TGF-β1 in ASM cells for different groups. Cells were divided into HuR siRNA group and control group. RNA-interference was used to determine whether lowering HuR expression could decrease PDGF-induced TGF-β1 expression in HuR siRNA group and control group after the stimulation of PDGF for indicated times. Western blotting analysis was used to test the expression of TGF-β1 after interrupting HuR expression. The concentration of TGF-β1 in the cultured serum of HuR siRNA group and control group for 0, 6, 12 h under the stimulation of PDGF was measured by enzyme-link immunosorbent assay (ELISA). Cells were divided into control group, control+ PDGF 6 h group, HuR siRNA group and HuR siRNA+ PDGF 6 h group, then the half-life of TGF-β1 mRNA in different groups was determined by treating ASM cells with the transcriptional inhibitor actinomycin D (10 mg/L) for 0, 4, 8 and 12 h. Results: PDGF treatment for 0, 6, 12 and 24 h significantly promoted HuR mRNA and protein expression and the relative levels were 1.00±0.00, 1.35±0.14, 1.73±0.17, 2.07±0.10; 0.51±0.10, 0.67±0.05, 0.83±0.07, 0.95±0.02 (all P <0.05). Similar alterations could also be demonstrated at TGF-β1 mRNA and protein. The relative expression was 1.00±0.00, 1.27±0.06, 1.60±0.10, 1.87±0.10; 0.72±0.09, 0.87±0.07, 1.13±0.12, 1.33±0.05 (6 h versus 12 h and 12 h versus 24 h, P <0.05). HuR expression decreased 21.9% in HuR siRNA group compared with control group under the stimulation of PDGF for 12 h. HuR silencing also decreased PDGF-induced TGF-β1 over-expression in ASM cells. In the control group, the relative protein levels of PDGF treatment for 0, 6 and 12 h were 0.70±0.05, 0.89±0.06, 1.06±0.05 and the protein levels in HuR siRNA group were 0.67±0.09, 0.77±0.03, 0.89±0.05 (all P <0.05). The concentration of TGF-β1 in the cultured serum was measured by ELISA and the outcomes were (773.33±16.32, 877.97±16.03, 3 060.34±82.53) ng/L in control group for 0, 6 and 12 h. Under the same condition, the outcomes of HuR siRNA group were (277.33±9.93, 407.77±7.14, 828.05±11.67) ng/L (both P <0.05). Actinomycin D disturbed the process of transcription and the half-life of TGF-β1 mRNA in HuR siRNA group showed no significant change compared with the HuR siRNA+ PDGF 6 h group ( P >0.05). However, compared with control group and control + PDGF 6 h group, the half-life of TGF-β1 mRNA in HuR siRNA group showed significant change ( P <0.05). Conclusions: PDGF can elevate TGF-β1 expression in ASM cells. HuR regulates TGF-β1 expression by promoting its mRNA stability.- Published
- 2016
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41. [A Review of Electrical Property Tomography for Human Tissues].
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Li H, Shen S, and Yan D
- Subjects
- Humans, Image Processing, Computer-Assisted, Magnetic Resonance Spectroscopy, Tomography, X-Ray Computed, Electric Impedance, Tomography methods
- Abstract
In recent years,the technologies based on the electrical properties(EPs)of human tissue,such as electrical impedance tomography(EIT)and magnetic resonance electrical impedance tomography(MREIT),have become one of the most popular research subjects in biomedicine.Compared with EIT and MREIT,the magnetic resonance electrical property tomography(MR-EPT)is a new technique using nondestructive EPs method.MR-EPT reconstructs the electrical conductivity and permittivity of the biological tissues based on the radio frequency field of the magnetic resonance imaging(MRI)system.It can obtain an accurate and high resolution image without current injection.In this paper,several methods for the EPs are reviewed,especially the MR-EPT.The theory,advantages and prospects of MR-EPT’s are elaborated.The method of specific absorption rate(SAR)based on it is also introduced.MR-EPT is deserved further research and should be given more attention by the researchers.All this evolution based on MREPT can give new energy to the medical diagnosis.
- Published
- 2016
42. [Geographical features of malaria in Yunnan Province].
- Author
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Xiang-Hua M, Chun W, Ye-Rong T, Ying D, Yan D, Jian W, Meng-Ni C, Yan-Chun X, and Xiao-Dong S
- Subjects
- China epidemiology, Geography, Humans, Malaria epidemiology
- Abstract
Objective: To understand the geographical features of malaria in Yunnan Province, so as to provide the reference for malaria elimination., Methods: The data of malaria in Yunnan Province from 2012 to 2015 were collected and analyzed., Results: Totally 2 586 malaria cases were reported in Yunnan Province from 2012 to 2015, in which 274 (10.60%) were local cases and 2 311 (89.37%) were abroad imported, and one (0.03%) was domestic imported. The imported malaria cases and local cases were analyzed according to the sources and locations respectively, and the arithmetic means of the numbers of imported and local cases were 96.29 and 10.96 respectively, the standard deviations of the numbers of imported and local cases were 421.18 and 19.12 respectively, and the difference of the means was not significant ( Z = - 0.326, P > 0.10). Both the imported and local malaria cases could be clustered into five sections by the number of 5. The Herfendal-Hirshman indexes of the imported and local malaria cases were 8 121 and 1 598 respectively., Conclusions: There is no significant difference of the distribution between the imported and local malaria cases, and they should be attaching equal importance. The non-uniform degree of imported cases is higher than that of the local cases, while both of them could be divided into five major clusters in the prevention and control work.
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- 2016
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43. [In vitro observation of haemolymph melanization and melanin-related biosynthesis enzyme genes in silkworm, Bombyx mori].
- Author
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Li T, Zhang L, Shen Q, Zhao W, Li L, Lv Y, Jiang G, Yan D, Xiao J, and Chen P
- Subjects
- Animals, Bombyx microbiology, Escherichia coli, Genes, Insect, Larva, Bombyx enzymology, Bombyx genetics, Hemolymph chemistry, Melanins biosynthesis
- Abstract
The observation statistics suggested that the haemolymph melanization speed of larvae became fast and the growth inhibition of Escherichia coli was strong as the quantities of feeding on mulberry leaves increased. The RT-PCR result showed that the mRNA expressions of melanin biosynthesis enzyme BmTan, BmPo-1, BmYellow-f and BmDdc were high in the haemolyph of 5 L 3 d larvae. The qPCR analysis showed Bmtan, Bmddc, Bmyellow, Bmebony and Bmblack, especially Bmddc expression were significantly higher in black disease larvae than in normal larvae. Compared with control, Ddc inhibitors drastically inhibited the lipopolysaccharide-induced haemolymph melanization. In addition, the content of Dopa and Dopamine markedly rose after E. coli injection. These indicated that haemolymph melanization was linked to immune defenses and Bmddc may play a role in melanization response of haemolymph immune in silkworm.
- Published
- 2016
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44. [Correlative factors related to the density of Meriones unguiculatus in the Meriones unguiculatus plague foci of Hebei province, 2001-2013].
- Author
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Niu YF, Kang XP, Yan D, Zhang YH, Liu G, Kang DM, Liu HZ, Shi XM, and Li YG
- Subjects
- Animals, China epidemiology, Prevalence, Rodentia, Sentinel Surveillance, Weather, Gerbillinae, Plague epidemiology
- Abstract
Objective: To explore the yearly, monthly and habitat-related distribution and their relations with Meriones unguiculatus density in the Hebei Meriones unguiculatus plague foci, from 2001 to 2013., Methods: Data related to Meriones unguiculatus was gathered through the monitoring programs set up at the national and provincial Meriones unguiculatus plague foci in Hebei province, from 2001 to 2013. According to the yearly density of Meriones unguiculatus, criteria set for the three groups under study, were as follows:'high-risk group'-when the rodent density was≥1.00 under rodents/hm(2),'warning group'-when the rodents/hm(2)>rodent density> 0.20,'standard group'-when rodents/hm(2) rodent density≤0.20 rodents/hm(2). Differences of habitats and monthly distribution among the three groups were compared, under the Kruskal-Wallis H rank sum test while their relations were under the multiple correspondence analysis., Results: The Meriones unguiculatus densities were higher than 1.00 rodents/hm(2), far above the set national standards, in the monitoring area, between 2001 and 2005. From 2005, though the rodent densities began to decrease, however, figures from 2008 to 2013 were still among 0.20 to 1.00 rodents/hm(2). The distribution of habitats in the three groups showed that the Meriones unguiculatus densities were all different in habitats and the difference was statistically significant (P<0.05). The highest median densities were all in the arable land, with maximum value of high-risk group appeared the highest (20.50 rodents/hm(2)) in the wasteland. Monthly distribution showed that the Meriones unguiculatus densities were different and the difference was statistically significant (P<0.05) in the high-risk and standard groups but not statistically significant in the warning group. Data from the multiple correspondence analysis showed that there was a strong aggregation among wasteland, in April and June, while the warning group was associated with weather in July and the arable land., Conclusions: When the density became higher than 1.00 rodents/hm(2), the risk on animal plague increased in Hebei Meriones unguiculatus plague foci. Based on the distribution of Meriones unguiculatus, programs should be set to monitor the rodent in arable land and wasteland, in April and June, to reduce the prevalence of animals plague.
- Published
- 2016
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45. [Analysis of polymorphism of Pfhrp 2 gene in Plasmodium falciparum from falciparum malaria patients in Yunnan Province].
- Author
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Ying D, Ai-Ming S, Meng-Ni C, Yan-Chun X, Xiang-Hua M, Yan D, and Hen-Lin Y
- Subjects
- Adolescent, Adult, Amino Acid Sequence, Antigens, Protozoan chemistry, Child, Child, Preschool, China, Evolution, Molecular, Exons genetics, Female, Humans, Male, Middle Aged, Phylogeny, Protozoan Proteins chemistry, Sequence Alignment, Young Adult, Antigens, Protozoan genetics, Malaria, Falciparum parasitology, Plasmodium falciparum genetics, Polymorphism, Genetic, Protozoan Proteins genetics
- Abstract
Objective: To analyze the polymorphism of histidine rich protein 2 (HRP II) gene in Plasmodium falciparum ( Pfhrp 2) from falciparum malaria patients in Yunnan Province, so as to lay the foundation for studying the defection of antigen genes of Plasmodium ., Methods: The filter paper blood samples and related information of falciparum malaria cases reported were obtained in Yunnan Province from August 2012 to September 2015. Under the guidance of the specific primers, the exon2 regions in Pfhrp 2 gene in P. falciparum from DNA samples were amplified by PCR, and the PCR products were sequenced. The sequences of exon2 region in Pfhrp 2 gene were blasted by comparing with the reference sequences AY816237, AY816240, and AY816301. Next, the polymorphism of the sequence in exon2 region of Pfhrp 2 gene was analyzed by MEGA 5.04 software. The conserved sites and genetic distances between sequences were calculated by using the software as well, and the clustering tree was drawn according to the genetic distances between the amino acid sequences., Results: A total of 218 bloods samples from the falciparum malaria cases in 15 prefectures of Yunnan Province were collected, and the sources of infection included Yunnan, Africa and Myanmar. The PCR results showed that the exon2 regions in Pfhrp 2 genes of 155 samples were positive by amplification and their products were sequenced successfully. The sequence analysis showed that the length range of the amino acid residues of exon2 region in Pfhrp 2 gene was from 115 aa to 298 aa, the average length was 239.7 aa. There was no statistically significance among the means of the amino acid residues of the isolates from Africa (239.9 aa), Myanmar (239.5 aa) and Yunnan (241.6 aa) ( F = 0.025, P > 0.05). All the 155 amino acid sequences ended with type 12 repeat, 98.1% (152/155) of them started with type 1 repeat and 1.9% (3/155) of them started with type 2. Type 2 presented most frequently repeat in all the sequences and the average repeat times were 12.9. The homologous locus of the DNA sequences in exon2 regions of the 155 Pfhrp 2 genes was 894 bp, among which the conservative sites accounted for 20.6% (186/894), and the variable sites for 78.2% (699/ 894). The genetic distances between the sequences of Africa isolates ranged from 0 to 0.741, and those of the Myanmar and Yunnan isolates were 0-0.948 and 0-0.750, respectively. The cluster analysis showed that all the 155 sequences clustered into 3 categories on genetic distances between amino acid sequences according to the size of the amino acid sequence length. At the same level, the sequences had approximate lengths and amino acid repeat types., Conclusions: The sequence of exon2 region in Pfhrp 2 gene of P. falciparum from falciparum malaria cases in Yunnan Province is highly polymorphic, the P. falciparum isolates are clustered mainly according to the size of the amino acid sequence of exon2 region in Pfhrp 2 gene.
- Published
- 2016
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46. [Research Progress in Enveloped Glycoproteins and the Membrane-fusion Mechanism of Nipah Virus].
- Author
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Yan D and Wang Z
- Subjects
- Animals, Henipavirus Infections metabolism, Humans, Membrane Fusion, Nipah Virus genetics, Receptors, Virus genetics, Receptors, Virus metabolism, Viral Envelope Proteins genetics, Henipavirus Infections virology, Nipah Virus metabolism, Viral Envelope Proteins metabolism
- Abstract
Nipah virus (NiV) is the pathogen of an emerging zoonotic disease that is highly lethal and infectious. NiV seriously impacts human lives and the property in the epidemic areas and poses a great threat to the global public health security. This paper provides a brief introduction to the morphological structure, and physiological function of the attachment protein G and the fusion protein F, which are both crucial glycoproteins located on the surface of the virus envelope. Moreover, recent advances in domestic and international research are reviewed. We will consider tissue tropism to elaborate the interactive mechanism between the attachment protein and its protein receptors ephrin-B2/B3,as well as the interactions between the two glycoproteins in detail. Avenues of future research are also discussed.
- Published
- 2016
47. [Diversity and cytotoxic activity of endophytic bacteria isolated from Sonneratia apetala of Maowei Sea].
- Author
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Li F, Gao C, Zhu L, Yu L, Qin M, and Yan D
- Subjects
- Bacteria classification, Bacteria genetics, Cell Survival, Endophytes classification, Endophytes genetics, Hep G2 Cells, Humans, Phylogeny, Plant Roots microbiology, Protein Conformation, Wetlands, Bacteria chemistry, Bacteria isolation & purification, Biodiversity, Endophytes chemistry, Endophytes isolation & purification, Lythraceae microbiology
- Abstract
Objective: The purpose of this study was to study the distribution, diversity and cytotoxic activity of endophytic bacteria of Sonneratia apetala collected from Maowei Sea, Qinzhou city., Methods: The 16S rRNA gene sequencing and MTT were used to explore the diversity and cytotoxic activity of endophytic bacteria isolated from different organs and tissues of Sonneratia apetala., Results: Total of 38 isolates were obtained. The result of diversity analysis showed that these isolates could be phylogenetically classified into 21 genera and 12 families, based on their 16S rRNA gene sequencing. Of them 5 were potential new genera or new genus. Five strains (R74, R71, S92, S85 and S84) had cytotoxic activity against human liver carcinoma Hep G2 cell line., Conclusion: Endophytic bacteria of Sonneratia apetala are genetically diverse and most of them have abundant new bioactivities.
- Published
- 2016
48. [Genetic Characteristics of Coxsackievirus Group A Type 4 Isolated from Patients with Acute Flaccid Paralysis in Shaanxi, China].
- Author
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Wang D, Xu Y, Zhang Y, Zhu S, Si Y, Yan D, Zhu H, Yang Q, Ji T, and Xu W
- Subjects
- China, Enterovirus A, Human classification, Genotype, Humans, Phylogeny, Viral Proteins genetics, Enterovirus A, Human genetics, Enterovirus A, Human isolation & purification, Enterovirus Infections virology, Paralysis virology
- Abstract
We analyzed the genetic characteristics of coxsackievirus A4 (CV-A4) based on the entire VP1 coding region. Samples were isolated from patients with acute flaccid paralysis (AFP) in Shaanxi, China from 2006 to 2010. We wished to ascertain the predominant genotype and the relationship between CV-A4 infection and AFP. Sixty-eight non-polio enteroviruses were inoculated onto RD cells (to increase the virus titer) and molecular typing was undertaken. The entire VP1 coding region was amplified. Percentage of CV-A4 was 10.3% (7/68). Analyses of genetic identify and creation of phylogenetic trees revealed that CV-A4 could be classified into A, B and C genotypes. Seven CV-A4 strains from Shaanxi and other CV-A4 strains from China formed an independent evolution lineage located in group 4 and belonged to the C2 sub-genotype. These data suggested that CV-A4 strains of sub-genotype C2 were the predominant genotypes in China. These strains co-evolved and co-circulated with those from other provinces in China, so continued monitoring of CV-A4 (by clinical and genetic surveillance) should be enhanced.
- Published
- 2016
49. [Analysis of different dosage forms of Xiasangju granules on fingerprints and models using high performance liquid chromatography].
- Author
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Xia BH, Yan D, Cao Y, Zhou YM, Li YM, Xie JC, Bai YB, Liao DF, and Lin LM
- Subjects
- Drug Dosage Calculations, Principal Component Analysis, Quality Control, Chromatography, High Pressure Liquid methods, Drugs, Chinese Herbal analysis
- Abstract
To establish the fingerprints of Xiasangju granules (with sugar and non-sugar forms) by HPLC, and provide reference for their identification and effective quality control. High performance liquid chromatography (HPLC) method was used to collect the fingerprints of 20 batches of non-sugar Xiasangju granules and 34 batches of sugar type Xiasangju granules. Their main different components were classified and screened by mode identification methods (principal component analysis, PCA, and orthogonal partial least squares discriminate analysis, OPLS-DA). The principal components were identified by comparing with reference standards. The fingerprints of Xiasangju granules (sugar type and non-sugar type) were established. PCA could not fully classify the two types of granules, while OPLS-DA could obviously classify these two different types of Xiasangju granules. Six components showed greatest difference between two types of granules, including salviaflaside, luteoloside and linarin. The developed mode identification method is helpful to control the overall quality of Xiasangju granules, and it provides an effective approach to quality evaluation., Competing Interests: The authors of this article and the planning committee members and staff have no relevant financial relationships with commercial interests to disclose., (Copyright© by the Chinese Pharmaceutical Association.)
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- 2016
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50. [The antagonistic effect and mechanism of N-acetylcysteine on acrylamide-induced hepatic and renal toxicity].
- Author
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Wang D, Qi J, Pan X, Yan D, and Yan H
- Subjects
- Animals, Cyclooxygenase 2 metabolism, Female, I-kappa B Proteins metabolism, Kidney metabolism, Kidney pathology, Liver metabolism, NF-KappaB Inhibitor alpha, Rats, Rats, Sprague-Dawley, Signal Transduction, Transcription Factor RelA metabolism, Acetylcysteine pharmacology, Acrylamide toxicity, Kidney drug effects, Liver drug effects
- Abstract
Objective: The aim of this study is to investigate hepatic and renal toxicity of acrylamide (ACR) , the antagonistic effect and possible mechanism of N-acetylcysteine (NAC) on the toxicity., Methods: Forty female SD rats were randomly divided into four groups. All the rats were administrated by intraperitoneal(i.p.) injection and 1.5 hours later by gavage. The control group was administrated with 0.9% NaCl by i.p. injection and gavaged with 0.9% NaCl. The NAC group was administrated with 200 mg/kg NAC by injection and gavaged with 0.9% NaCl. The ACR group was administrated with 0.9% NaCl by injection and gavaged with 40 mg/kg ACR. The combined treatment group was administrated with 200 mg/kg NAC by i.p. injection and gavaged with 40 mg/kg ACR. The rats were administrated once a day for 2 weeks. After 24 hours of the last administration, the rats were decapitated. The blood was collected, the liver and kidney were separated. The body weight, organ coefficient and serum biochemical parameters were measured, and the pathological changes of the tissues were examined with a microscope. Then the expression of NF-κB p65, IκB-α and COX-2 were detected by Western blot., Results: From the second day to the end of the exposure, the body weight of rats in the ACR group was statistically lower than that in the control group (P<0.05) . Compared with the combined treatment group, the body weight in the ACR group statistically decreased in the second and third days (P < 0.05) . The liver and kidney organ coefficients in the ACR group were (4.159%±.371%) and (0.764%±0.068%) respectively, which increased statistically when compared with the control group (P < 0.05) . The contents of ALT, AST and Cr in the serum in the ACR group were (77.370±16.397) U/L、(379.410±57.817) U/L and (77.812±6.391) μmol/L respectively, which were not significantly different with those in the control group and the combined treatment group (P>0.05) . The content of BUN in the serum in the ACR group was (7.005±1.009) mmol/L, which was statistically higher than that in the control group (P<0.05) . Histopathology results showed unclear boundary and nucleus pyknosis in hepatocytes, loose and disordered structures of hepatic cords in the ACR group, but no obvious pathology changes were observed in the kidneys of each group. In the Western blot results, the expression of nuclear NF-κB p65 and COX-2 in the liver in the ACR group was statistically higher than that in the control group and the combined treatment group (P<0.05) , and the expression of IκB-α in the liver in the ACR group statistically decreased compared with the control group and the combined treatment group (P<0.05) . The expression of total NF-κB p65 in the liver in the ACR group was statistically higher than that in the control group (P<0.05) ., Conclusion: Under the conditions of this experiment, ACR may induce hepatic toxicity through the activation of NF-κB signaling pathway, and NAC could antagonize the hepatic toxicity of ACR by inhibiting the NF-κB signaling pathway, whereas the toxic effect of ACR on kidney needs to be further studied.
- Published
- 2016
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