Objective Detecting the level of IDO and KYN in ulcerative colitis (UC) patients; using ROC curve to discuss their value in the diagnosis of patients with active UC. Methods 60 cases of UC group, 18 cases of dis-ease control group and 20 cases of healthy control group were included in the study. Immunohistochemical staining methods were used to detect the expression of IDO in colonic mucosa of UC, enzyme-linked immunosorbent (ELISA) methods were used to detect the serum levels of IDO, KYN and CRP, and the value with ROC curve method was analyzed. Results ① There was a positive correlation between IDO level and IDO expression (P<0.05). There was a positive correlation between KYN level and IDO expression (P<0.05). ②The levels of IDO and KYN in UC group were higher than those of disease control group and health control group (P<0.05). ③The levels of IDO and KYN in patients with active UC were significantly higher than that in patients with catabasis UC (P<0.01), and the levels increased with severity of inflammation. ④ The levels of IDO and KYN in active UC were positively related to disease activity and CRP levels (P<0.05). ⑤The IDO,KYN and CRP area under ROC curve were 0.976, 0.856 and 0.864;best cut-off point were 53.66 U/L, 2.34 nmol/L and 1.75 mg/ml;sensitiv-ity were 90.5%, 78.65% and 100.0%; specifity were 94.4%, 83.3% and 61.1%; Youden index were 0.839 2, 0.619 0 and 0.611 1. Conclusion The levels of IDO and KYN in serum can be used as an important index to judge the severity of UC. They have important value in the diagnosis of active UC . The value of IDO is higher than KYN and CRP.

Objective In clinical cerebral perfusion CT examination, repeated scanning the region of interest in the cine mode increases the radiation dose of the patients, while decreasing the radiation dose by lowering the scanning current results in poor image quality and affects the clinical diagnosis. We propose a penalized weighted least-square (PWLS) method for recovering the projection data to improve the quality of low-dose cerebral perfusion CT imaged. This method incorporates the statistical distribution characteristics of brain perfusion CT projection data and uses the statistical properties of the projection data for modeling. The PWLS method was used to recover the data, and the Gauss-Seidel (GS) method was employed for iterative solving. Adaptive weighting is introduced between the original projection data and the projection data after PWLS restoration. The experimental results on the clinical data demonstrated that the PWLS-based sinogram restoration method improved noise reduction and artifact suppression as compared with the conventional noise reduction methods, and better retained the edges and details to generate better cerebral perfusion maps.

Objective To investigate the application of quality control circle ( QCC) intravenous therapy to enhance the quality and reduce the PICC complication rate. Methods Established QCC team and the theme of“Reduce the incidence of PICC complications”, we surveyed, analyzed, set goals, developed and implemented measures to further confirm the effectiveness and standardization. Results After QCC application, PICC overall complication rate, the incidence of plugging and thrombosis were significantly lower than before the application, the differences were statistically significant (χ2 =21. 338,12. 032,7. 684;P<0. 01). After QCC application, quality control practices of QCC members, team cohesion, communication and coordination, degree of harmony, job motivation, self-confidence were higher than these of before activities (P <0. 01). Conclusions The application of QCC can reduce overall complication rate of PICC plugging and thrombosis, and promote continuous intravenous therapy quality improvement, improved nurses motivation, personal values, team cohesion and communication skills. It is worthy of promotion.

Objective In clinical cerebral perfusion CT examination, repeated scanning the region of interest in the cine mode increases the radiation dose of the patients, while decreasing the radiation dose by lowering the scanning current results in poor image quality and affects the clinical diagnosis. We propose a penalized weighted least-square (PWLS) method for recovering the projection data to improve the quality of low-dose cerebral perfusion CT imaged. This method incorporates the statistical distribution characteristics of brain perfusion CT projection data and uses the statistical properties of the projection data for modeling. The PWLS method was used to recover the data, and the Gauss-Seidel (GS) method was employed for iterative solving. Adaptive weighting is introduced between the original projection data and the projection data after PWLS restoration. The experimental results on the clinical data demonstrated that the PWLS-based sinogram restoration method improved noise reduction and artifact suppression as compared with the conventional noise reduction methods, and better retained the edges and details to generate better cerebral perfusion maps.

Small ubiquitin-related modifier(SUMOylation)is a dynamic post-translational modification that maintains cardiac function and can protect against a hypertrophic response to cardiac pressure overload.However,the function of SUMOylation after myocardial infarction(MI)and the molecular details of heart cell responses to SUMO1 deficiency have not been determined.In this study,we demonstrated that SUMO1 protein was inconsistently abundant in different cell types and heart regions after MI.However,SUMO1 knockout significantly exacerbated systolic dysfunction and infarct size after myocardial injury.Single-nucleus RNA sequencing revealed the differential role of SUMO1 in regulating heart cells.Among cardiomyocytes,SUMO1 deletion increased the Nppa+Nppb+Ankrd1+cardiomyocyte subcluster pro-portion after MI.In addition,the conversion of fibroblasts to myofibroblasts subclusters was inhibited in SUMO1 knockout mice.Importantly,SUMO1 loss promoted proliferation of endothelial cell subsets with the ability to reconstitute neovascularization and expressed angiogenesis-related genes.Computational analysis of ligand/receptor interactions suggested putative pathways that mediate cardiomyocytes to endothelial cell communication in the myocardium.Mice preinjected with cardiomyocyte-specific AAV-SUMO1,but not the endothelial cell-specific form,and exhibited ameliorated cardiac remodeling following MI.Collectively,our results identified the role of SUMO1 in cardiomyocytes,fibroblasts,and endothelial cells after Ml.These findings provide new insights into SUMO1 involvement in the patho-genesis of MI and reveal novel therapeutic targets.