Objective To define the MRI features of biliary postoperative disoders,so as to find its exact causes.Methods MRI informations of 41 patients with biliary postoperative disoders were retrospectively evaluated to find whether there were such disorders as biliary dilatation,stricture,cholangeitis,remnant stones,remnant gallbladder,etc.Results The biliary abnormality was found in thirty-eight of the 41 patients,including ductal dilatation in 20,intraductal stones in 16,cholangietis in 13,ductal stricture in 7,tumors in hepatic hila in 3.The biliary dilatation commonly presented within 3 months after operation while the biliary stricture and cholangeitis presented commonly 6 months after operation.Conclusion The biliary postoperative disoders is mainly caused by biliary dilatation,stricture and remnant stone,MRI is the sensitive and effective method for diagnosis of biliary abnormalities.

Objective To establish the assay method of hydroxyproline(HYP) level in rat lung tissue for evaluating the lung fi-brosis degree .Methods The impact of different acid hydrolyzable time ,oxidative time ,developing time on the assay results of the HYP level in rat lung tissue was studied .On this basis ,the assay method for determining the HYP level was established and prelim-inarily applied in the detection of the HYP level in rat lung tissue .Results The optimal condition for the HYP level detection in rat lung tissue was as follows :7 .50 mol HCL was hydrolyzed for 16 h at 110 ℃ ,oxidized for 10 min at room temperature and devel-oped for 25min at 60℃ .The sensitivity of this method was 0 .067μg/mL .The recovery rate and the average CV of this method were 88 .85% -110 .88% and 4 .70% -6 .60% ,respectively .In the study of bleomycin induced rat lung fibrosis ,the HYP level of the model group was obviously higher than that of the control group .Conclusion This method has high sensitivity ,high recovery rate and good reproducibility ,and may be used as a reliable quantitative method to judge the lung fibrosis level in clinic .

Objective:Generation and functional analysis of EBV LMP2A specific CTL elicited by DC transfected with recombinant adenovirus in vitro .Methods:PBMC were isolated from healthy EBV carriers and NPC patients, and then cocultured with autologous mature Ad5 LMP2A transfected DC at the ratios of 20∶1. Cytotoxicity of LMP2A specific CTL was determined with LDH release assay, the populations of CTL were performed by FACS,the IFN ? secretion and FasL mRNA expression of the CTL were detected by biological activity assays and RT PCR, respectively.Results:The results showed that high cytotoxicity of LMP2A specific CTL could be elicited by autologous transfected DC. The cytotoxicity boosted with the increase of transfected DC stimulation times, but there were no significant changes between two and three stimulations.The phenotypic analysis demonstrated that the LMP2A specific CTL induced at day 14 consisted of a majority of CD4 + and CD8 +T cells, and only a small percentage of CD56 + cells. The IFN ? secreted in the supernatants of cell culture also increased with the stimulation times. In addition, the specific CTL at day 14 from EBV healthy carriers could express FasL mRNA.Conclusion:Strong and functional EBV specific CTL could be generated by autologous mature DC transfected with adenovirus encoding LMP2A, which could provide a rationale for the immunotherapy of EBV associated NPC. [

AIM:To evaluate the effects of treatment with HP 1188-immunoglobulin yolk ( HP1188-IgY) on Helicobacter pylori ( H.pylori)-infected gastritis in BALB/c mice.METHODS:BALB/c mice were used to establish an animal model of H.pylori-infected gastritis, and the mice were divided into 8 groups (10 mice per group).Oral antibiotics were used in group 1, 1 mg HP1188-IgY in group 2, 1 mg HP1188-IgY plus 30%sucralfate in group 3, 5 mg HP1188-IgY in group 4, 5 mg HP1188-IgY plus 30%sucralfate in group 5, PBS in group 6, and 30% sucralfate in group 7 with the treatment once per day for 10 d;and 2.5 mg HP1188-IgY was injected hypodermically twice with a 48-h interval in group 8.Another 10 mice were used as normal control in group 9.The planting of bacteria in the stomach was assayed by bacteri-al culture, rapid urease test, PCR and pathological sectioning .RESULTS:Intragastric administration with 1 mg HP1188-IgY plus 30%sucralfate per day effectively cured the injury of gastric mucosa caused by H.pylori infection, and the effect has no significant difference compared with antibiotics (P>0.05).CONCLUSION:We establish a BALB/c mouse mod-el infected with H.pylori successfully.Sucralfate (30%) is an ideal protectant for HP1188-IgY, which might decrease H. pylori infection in the stomach of BALB/c mice by oral inoculation .

Objective To synthesize and identify artificial antigens of lung elastin degradation peptide and for the purpose of preparation of COPD test.Methods The artificial antigens were synthesized by Sulfo-SMCC and KLH.The complete antigens were identified by ultraviolet spectrum and SDS-PAGE.Immunize Balb/c mice was used to prepare antibody.The antiserum activity was evaluated by indirect competitive ELISA.Results The artificial antigens were identified by ultraviolet spectrum and SDS-PAGE. The protein concentration was 1.181 mg/mL.The titer of antiserum was 1∶64 000,and IC50 was 13.7 ng/mL.The antiserum had no cross-reaction with nonsense peptide.Conclusion The artificial antigens were acquired successfully,which had good immunoge-nicity.The results have laid basis for COPD test.

Objective Toinvestigatetheclinicalvalueofhumanneutrophillipocalin(HNL)detectioninthedifferentialdiagnosis of bacterial and viral infections of elderly patients with acute respiratory infection .Methods 142 elderly patients with respiratory infection were divided the bacteria group (96 cases) and the virus group (46 cases) according to their infections ,42 healthy people in the corresponding period were enrolled as the control group .Enzyme-linked immunosorbent assay and highly sensitive dry chemi-cal particles enhanced immune turbidity assay were employed to detect their blood HNL and C-reactive protein(CRP) ,respectively , and virus-specific antibodies detection were performed simultaneously .Results Compared the blood HNL ,CRP levels and their positive rates of patients in bacteria group with those in the virus group ,control group ,respectively ,differences showed statistically significant(P<0 .01) ,while the differences of indicators listed above between the virus group and control group had no statistically significant(P>0 .05) .Antibiotic treatment before and 24 ,48 and 72 hours after ,the concentrations of HNL were (216 .8 ± 64 .1) , (192 .0 ± 41 .2) ,(158 .0 ± 54 .5) and (87 .0 ± 12 .4)μg/L ,respectively ,while those of CRP were (50 .9 ± 40 .9) ,(46 .2 ± 18 .3) , (39 .6 ± 9 .6) and (12 .6 ± 9 .8) mg/L ,respectively .Sensitivity ,specificity ,positive predictive value and negative predictive value of HNL detection were 90 .6% ,90 .9% ,91 .5% and 89 .9% ,respectively ,which were higher than those of CRP (88 .5% ,85 .2% , 86 .7% and 87 .2% ,respectively) ,with statistically significant difference(P<0 .05) .Conclusion NHL detection possesses impor-tant significance in differential diagnosis between bacterial and viral infections of elderly patients with acute respiratory infection .

Objective To screen stable express A30P a-synuclein PC12 cell as the research object,and to preliminarily investigate the activity of different glycogen systhesis kinase 3β (GSK3β) for the regulation of autophagy pathway causes a-synuclein autophagy level change and its effects on cell growth.Methods The vector of A30P a-synuclein was used to transfect to PC12 cells.G418 was used to screen stable expressed cells.Liposome method was used to transfect GSK3β-expressed plasmid,GSK3β silence plasmid,and blank plasmid into these cell lines,and stable expressed activity of GSK3β cell lines were screened.Western blot was used to detect the expression of GSK3 β after transfection and verify the transfection efficiency.Western blot was used to test groups of cells in LC-3 Ⅱ,Beclin1,and a-synuclein expressions.Methyl thiazolyl tetrazolium (MTF) method was used to detect the change of cell proliferation.Terminal dexynucleotidyl transferase (TdT) mediated dUTP nick end labeling (TUNEL) method was used to detect apoptosis.Results (1) When GSK3β expressed group was compared to GSK3β silence group,blank plasmidgroup,and blank control group,the expressions of LC-3 Ⅱ and Beclin1 were significantly increased (P ＜ 0.05),the expression of a-synuclein was significantly reduced (P ＜ 0.05),the results of MTT and TUNEL showed that the cells were the decrease of apoptosis and increase of cell proliferation,with a statistically significant difference (P ＜ 0.05).(2) When GSK3β silence group was compared to GSK3β express group,blank plasmidgroup,and blank control group,the expressions of LC-3 Ⅱ and Beclin1 were significantly reduced (P ＜ 0.05),the expression of a-synuclein was significantly increased (P ＜ 0.05),the results of MTT and TUNEL showed that the cells were the increase of apoptosis and decrease of cell proliferation,with a statistically significant difference (P ＜0.05).Conclusions (1) Activation of GSK3β activity can improve the level of cell autophagy,enhance the ability of alpha-synuclein degradation,and promote cell survival.(2) Inhibition of GSK3β activity can reduce the level of cell autophagy,weaken the ability of alpha-synucleindegradation,and reduce cell survival.(3) Autophagy is closely related to the pathogenesis of Parkinson's disease (PD).The improvement of the level of autophagy and enhancing of the degradation of asynuclein is a new way of the future treatment of PD.

PURPOSE: Developing a risk prediction model for invasive fungal disease based on an analysis of the disease-related risk factors in critically ill patients in the intensive care unit (ICU) to diagnose the invasive fungal disease in the early stages and determine the time of initiating early antifungal treatment. METHODS: Data were collected retrospectively from 141 critically ill adult patients with at least 4 days of general ICU stay at Sun Yat-sen Memorial Hospital, Sun Yat-sen University during the period from February 2015 to February 2016. Logistic regression was used to develop the risk prediction model. Discriminative power was evaluated by the area under the receiver operating characteristics (ROC) curve (AUC). RESULTS: Sequential organ failure assessment (SOFA) score, antibiotic treatment period, and positive culture of Candida albicans other than normally sterile sites are the three predictors of invasive fungal disease in critically ill patients in the ICU. The model performs well with an ROC-AUC of .73. CONCLUSION: The risk prediction model performs well to discriminate between critically ill patients with or without invasive fungal disease. Physicians could use this prediction model for early diagnosis of invasive fungal disease and determination of the time to start early antifungal treatment of critically ill patients in the ICU.
Adult ; Candida albicans ; Critical Care* ; Critical Illness* ; Early Diagnosis ; Humans ; Intensive Care Units* ; Logistic Models ; Retrospective Studies ; Risk Factors ; ROC Curve ; Solar System

AIM: To identify the differentially expressed lncRNAs related to myelodysplastic syndromes by method of bioinformatics. METHODS: The GSE145733 was downloaded from GEO database; the differentially expressed lncRNAs were screened out by GEO2R. miRNA and mRNA associated with the differentially expressed lncRNAs were analyzed by the platform miRDB. lncRNA-miRNA-mRNA network was constructed and visualized by Cytoscape software. We annotated and enriched the lncRNAs to biological functions and pathways by GO and KEGG tools. RESULTS: Five differentially expressed lncRNAs were screened out. These lncRNAs were associated with 19 miRNAs and 84 mRNAs. They mainly affected the functions such as substance synthesis and transportation, gene transcription, and nervous system. CONCLUSION: We discovered the lncRNA expression characteristics in MDS patients, predicted the functions of these lncRNAs, which may provide new drug targets for the precise medication in MDS.

Objective:To analyze the distribution and drug resistance of wound pathogenic microorganisms in outpatients of wound healing center so as to provide a basis for the standardized construction of wound healing centers.Methods:A retrospective case series study was used to analyzed the data of 365 outpatients treated at Ruijin Hospital, Shanghai Jiaotong University School of Medicine from December 2017 to October 2019. There were 220 males and 145 females, aged (58.8±18.9)years (range, 18-98 years). The patients included 92 first-visit patients and 273 re-visit patients. The culture results (positive rate of pathogenic microorganisms, bacterial species, bacterial distribution) and drug sensitivity results of the wound secretions were compared and analyzed.Results:(1) Among 365 samples of wound secretions, 198 patients were positive for pathogenic microorganisms with a positive rate of 54.3%. A total of 107 strains (51.0%) of Gram-positive bacteria were detected, mainly Staphylococcus aureus (70 strains, 33.3%); 95 strains (45.2%) of Gram-negative bacteria were detected, mainly Escherichia coli (20 strains, 9.5%), followed by Pseudomonas aeruginosa (17 strains, 8.1%); 8 strains (3.8%) of fungi were detected. (2) A total of 26 (28.3%) first-visit patients were positive for pathogenic microorganisms, and 172 (63.0%) re-visit patients were positive for pathogenic microorganisms. The rate of positive microorganism detection had significant differences between first-visit and re-visit patients ( P<0.05). (3) A total of 29 strains were detected in first-visit patients, including 16 strains (55.2%) of Gram-positive bacteria, 11 strains (37.9%) of Gram-negative bacteria and 2 strains (6.9%) of fungi. A total of 181 strains were detected in re-visit patients, including 91 strains (50.3%) of Gram-positive bacteria, 84 strains (46.4%) of Gram-negative bacteria and 6 strains (3.3%) of fungi. The microbial distribution was significantly different between first-visit and re-visit patients ( P<0.05). (4) Compared with first-visit patients, the resistance of Staphylococcus aureus isolated from the re-visit patients to spenicillin, oxacillin, ciprofloxacin, tetracycline, clindamycin, moxifloxacin, erythromycin, and levofloxacin were increased variably. No vancomycin-resistant Staphylococcus aureus was detected, indicating that the staphylococcus aureus presented in the wound was highly sensitive to vancomycin. Conclusions:Staphylococcus aureus is the most common microorganism in wound secretions in outpatients of wound healing center. The rate of positive pathogenic microorganisms in wound secretions of re-visit patients is significantly higher than that of first-visit patients, and the distribution of pathogenic microorganisms of first-visited and revisited patients differs significantly. The Staphylococcus aureus detected in re-visit patients has a higher resistance to common antibiotics compared with first-visit patients. It is suggested that timely detection of pathogenic microorganisms in outpatients and effective control and supervision of outpatient infections are important contents that cannot be ignored in the construction of wound healing center.