ABSTRACT
Objective To establish Cdh5-Cre ERT /Acta2-tdTomato-STOP floxed -eGFP knockin genetic tracing mice, and to investigate its application in studies on vascular endothelial cell transition in liver fibrosis. Methods Cdh5-Cre ERT mice were mated with Acta2-KI mice, and the Cdh5-Cre ERT /Acta2-KI genetic tracing mice were obtained and identified by PCR genotyping. Primary liver sinusoid endothelial cells (LSECs) were isolated and cultured, and a model of CCl 4 -induced liver fibrosis was established. LSECs and liver tissue were collected for immunofluorescent staining to observe the expression of the fluorescent proteins tdTomato and eGFP. Results After being induced by tamoxifen, LSECs and liver tissue of Cdh5-Cre ERT /Acta2-KI genetic tracing mice expressed eGFP under the conditions for epithelial-mesenchymal transdifferentiation established in vivo and in vitro, while the control group without induction expressed tdTomato alone. Conclusion The successfully established Cdh5-Cre ERT /Acta2-KI genetic tracing mice can realize the effective labeling of epithelial-mesenchymal transdifferentiation, which provides a genetic tracing basis for the diverse sources of mesenchymal myofibroblasts in liver fibrosis.
ABSTRACT
Objective To investigate the value of CD5 molecule-like protein(CD5L) and partial pressure of CO2 in arterial blood(PaCO2) in predicting the survival of patients with severe asthma and mechanical ventilation.Methods From Jan.2013 to Jan.2016,a total of 38 patients with severe asthma and mechanical ventilation were enrolled.Acute Physiology and Chronic Health EvaluationⅡ(APACHE II)were used to assess the severity.Enzyme linked immunosorbent assay was used to detect serum levels of CD5L at admission and 6 h after treatment.PaCO2 were also detected.Pearson correlation analysis was used to analyze the correlation between APACHEⅡ score and CD5L and PaCO2 levels.Receiver operation characteristic(ROC) curve was used to evaluate the value of CD5L and PaCO2 in predicting the survival of patients.Results APACHEⅡscores of survival patients were significantly higher than dead patients(P<0.05).CD5L level of survival patients after treatment was significantly lower than dead patients,while PaCO2 level was significantly higher(P<0.05).APACHEⅡ score was negatively correlated with serum CD5L level(r=-0.347,P<0.05),while positively correlated with PaCO2 level(r=0.573,P<0.05).ROC curve analysis showed that serum CD5L and PaCO2 were with predictive value for prediction the survival of patients,with sensitivity of 93.33%,specificity of 75.00%,accuracy of 89.47%,positive predictive value of 93.33%,and negative predictive value of 75.00% for CD5L,and those for PaCO2 were 90.00%,87.50%,89.47%,97.42% and 70.00%.Conclusion With the decreasing of CD5L level and increasing of PaCO2 level,severity of disease in patients with severe asthma and mechanical ventilation could be more serious condition,indicating poor prognosis.CD5L and PaCO2 could be with fine predictive value of survival of patients with severe asthma and mechanical ventilation.
ABSTRACT
The management for qualification documents of medical instruments is very important work to management department of medical instruments. Because the number of qualification documents of medical instruments is very large and they have an expiry date, it is difficult to manage them. This article discussed how to manage qualification documents of medical instruments, and an information management system that has a function of traceability management has been developed. This information management system standardizes management for qualification documents of medical instruments, and ensures that qualification documents of medical instruments are available and can be traced. Besides, it can reduce the amount of work for medical instruments management.