Objective To study the effects of ethanol extract of rhizoma phragmitis on liver glycogen content and glycogen synthetase (GS) in streptozotocin (STZ) induced diabetic mice. Methods The diabetic model mice were divided in-to model control group, high-dose group and low-dose group, 10 mice for each group. Another 10 normal mice were used as control group. The liver glycogen content was detected by histochemical staining of glycogen (PAS) method. The expression of GS mRNA was detected by reverse transcription polymerase chain reaction (RT-PCR) and Western blot assays. Results After PAS staining the hepatic glycogen content decreased significantly in model control group, and which was significantly increased in low-dose group and high-dose group compared with that of model control group (P＜0.01). The hepatic glyco-gen content was the highest in high-dose group compared with that of other three groups. The levels of GS mRNA and GS protein were significantly lower in model control group than those of other three groups, which were significantly lower in low-dose group than those of high-dose group (P＜0.05). Conclusion There is a dose-dependent effect of ethanol extract of rhizoma phragmitis on liver glycogen in STZ induced diabetic mice, which may be related with the increased expression of liver glycogen synthetase.

Objective This study was aimed to characterize the swine leukocyte antigen( SLA) class I genes of GGTA1 -/ - Wuzhishan minipigs and compare their similarity to human leukocyte antigen( HLA) . It has important implica?tions for understanding the cellular rejection in xenotransplantation. Methods Specimens of ear tissue from six founding GGTA1 -/ - Wuzhishan minipigs were collected, and the SLA class I genes (SLA?1, SLA?3, SLA?2) were amplified by RT?PCR. Purified products were cloned into pEASY?T1 vectors and sequenced, followed by BLAST alignment and using bioin? formatc analysis to characterize the SLA class I genes and compare with the similarity to HLA. Results A total of six al?leles were detected, among them alleles were previously reported (SLA?1?0703,SLA?2?1102, SLA?3?0401, SLA?3?0403), and the other were novel (SLA?1?0401wz01, SLA?2?11wz01). The homology between alleles of SLA class I genes in Wuzhishan minipigs and HLA was from 70?5% to 72?1%. The homology analysis of critical amino acid residues on HLA binding with human CD8 + molecules showed that SLA?1?0401wz01, SLA?1?0703, SLA?2?11wz01, SLA?2?1102 and SLA?3?0401 occurred mutant at amino acid positions 225 and 228 ( T→S,T→M) , whereas the other loci were highly conserved. There was a high homology at amino acid level between SLA?2?11wz01, SLA?2?1102 and HLA class I genes which are NK cell KIRs binding sites. Conclusions The amino acid sequences of SLA class I genes of GGTA1 -/ -Wuzhishan minipigs have a high homology to HLA. From the point of view of cell?mediated xenograft rejection, the amino acid sequences of SLA class I genes of GGTA1 -/ - Wuzhishan minipigs have a high homology to HLA, therefore, Wzhishan minipigs may become a good potential donor for pig?human xenotransplantation.

Objective:To explore the responsibilities of respiratory nurses in the management of chronic obstructive pulmonary disease (COPD) patient and the difficulties in disease management, so as to provide reference basis for formulating COPD management training strategies for respiratory nurses.Methods:Using phenomenological methodology, 14 nurses from the Department of Respiratory and Critical Care Medicine in the General Hospital of Ningxia Medical University and the First People′s Hospital of Yinchuan were interviewed in a personal semi-structured way from May to August 2021, and the data were sorted and analyzed according to Colaizzi 7-step analysis method.Results:Nurses′understanding of the responsibilities of COPD patient management could be summarized into five themes: dynamic monitoring and management of patients′ health, nursing decision-making of sudden changes in patients′ condition, implementation of patients′ out of hospital follow-up, promotion of improvement of patients′ self-management behavior, and cooperation among multidisciplinary team members. The difficult experience of nurses in the management of COPD patients abstracted five themes: lack of professional knowledge of COPD management, lack of clinical nursing decision-making authority, lack of human and financial support for follow-up, lack of communication skills with patients, and lack of multidisciplinary team formation in the hospital.Conclusions:Respiratory nurses have a clear understanding of the responsibilities of COPD patient management, but there are multiple difficulties in performing their responsibilities. We should pay attention to the responsibility positioning and difficulty support of nurses′ COPD management, and formulate targeted training strategies to promote the improvement of COPD nursing quality.

Objective:To observe the effects of salvianolic acid B on migration and tube formation of the retinal vascular endothelial cell (RVEC) in high glucose, and explore its mechanism with network pharmacology.Methods:The cells were divided into normal group, model group and 1.0, 0.5, 0.1 μg/ml salvianolic acid B group according to the random number table method. The cells of each group were added with 5.5 mmol/L glucose for intervention, and the salvianolic acid B group was added with 1.0, 0.5, and 0.1 μg/ml salvianolic acid B for intervention. After 72 h, the cell viability of each group was detected by the CCK-8 method. The cells were divided into normal group, model group and low-, medium-, and high-dose salvianolic acid B group according to the random number table method. Then the cells of the normal group were added with 5.5 mmol/L glucose; the model group was added with 25 mmol/L glucose; the low-, medium-, and high-dose salvianolic acid B group was added with 25 mmol/L glucose and 0.062 5, 0.1250, 0.250 0 μg/ml salvianolic acid B. Then by taking Transwell test to detect the number of cell migration, and Matrigel test to analyze the total length of cells tubes. The active targets of Salvianolic acid B were screened by SuperTarget and Swiss TargetPrediction. Then, the targets of diabetic retinopathy were obtained by searching the GAD database, pharmGkb database, TTD database, DiGSeE database and OMIM database. The effective targets of drug-disease interaction were screened, and the component-target-disease interaction network was constructed by Cytoscape. Finally, the effective targets were analyzed by DAVID for GO analysis and KEGG pathway enrichment analysis. Molecular docking was performed by using Accelrys Discovery Studio Client 2.5 software.Results:The CCK-8 method showed that the cell absorbance values of 0.5 and 0.1 μg/ml salvianolic acid B group were not significantly different from those of the normal group ( P>0.05). The results of Transwell experiment and Matrigel experiment showed that compared with the model group, the relative number of migrating cells and the total length of tubule formation in each dose group of salvianolic acid B decreased ( P<0.05 or P<0.01). The interaction network revealed that salvianolic acid B acted on 46 targets and 8 signaling pathways. Conclusions:Salvianolic acid B could inhibit the migrating and tube forming ability of RVEC cultivated by high glucose. The results suggest that salvianolic acid B may play roles in preventing diabetic retinopathy.