Octapeptin has strong antibacterial activity against Gram-negative bacteria such as Escherichia coli, Klebsiella pneumoniae and Acinetobacter baumannii, while it also has activity against some Gram-positive bacteria. This study used natural octapeptin A3 and B3 as lead compounds for structural modification. Twenty-one peptide derivatives (including A3 and B3) containing eight amino acid residues were prepared by solid-phase synthesis, and evaluated for antibacterial activity and renal cytotoxicity. Among them, three compounds 6, 7 and 17 exhibited broad-spectrum antibacterial activity and significantly enhanced the activity for Gram-positive bacteria while maintaining the activity of Gram-negative bacteria. Several compounds improved the activity for Pseudomonas aeruginosa. Compound 7 was active against all test strains and had relatively low renal cytotoxicity. The results provide a basis for the further development of novel polypeptide antibiotics.

Objective To analyze the factors associated with pain after arthroscopic rotator cuff bridge suture.Methods According to the inclusion and exclusion criteria,the data of 112 patients with unilateral rotator cuff injury who received arthroscopic bridge suture in our department were collected and were investigated in the form of telephone follow-up.In this study,SPSS 23.0 was used to input data and conduct statistical analysis.Logistic regression analysis was used to analyze the correlation between the above influencing factors and postoperative pain.Results A total of 112 patients were included for statistical analysis,single factor analysis revealed,including course of disease,smoking history,preoperative University of California,Los Angeles(UCLA)score,Constant score,numeric rating scale(NRS),size of rotator cuff tear,whether it was full-thickness tear and degree of tendon retraction might be related to postoperative pain(P<0.05).The age,gender,body mass index(BMI),drinking history,diabetes and hypertension were not related to postoperative pain(P>0.05).Multiple linear regression analysis concluded that there were four factors related to postoperative pain,and the correlation degree was preoperative NRS,preoperative UCLA score,tear size and smoking history.Conclusion The causes of postoperative pain after arthroscopic rotator cauff repair are complex and diverse.Analyzing the cause of postoperative pain can effectively reduce the pain of patients and promote the recovery of shoulder joint function.

AIM To optimize the processing technology of red Notoginseng Radix et Rhizoma and evaluate its blood tonifying activity.METHODS On the basis of a single factor experiment,with steaming temperature,steaming time,drying temperature,and drying time as influencing factors,the total contents of notoginsenoside R1,ginsenoside Rg1,Rb1,Rk3,Rh4,and 20(R)-ginsenoside Rg3 as evaluation indicators,Box-Behnken response surface method ology was used to optimize the processing technology.Upon the anemic mouse models jointly induced by 1-acetyl-2-phenylhydrazine(APH)and cyclophosphamide(CTX),the investigation of the blood tonifying activity of red Notoginseng Radix et Rhizoma was carried out in contrast to that of the steamed Notoginseng Radix et Rhizoma.RESULTS The optimal conditions,contributing saponin content of 8.326%and RSD of 0.087%,were determined as follows:steaming temperature of 130℃,steaming time of 4 hours,drying temperature of 60℃,and drying time of 48 h.The pharmacological activity revealed that the different processing techniques were responsible for the different blood enriching activity of notoginseng,with red Notoginseng Radix et Rhizoma displaying a better efficacy than that of steamed Notoginseng Radix et Rhizoma.CONCLUSION This stable and feasible method can be used to control the production of red Notoginseng Radix et Rhizoma.

Objective:To analyze the current situation of the development and allocation of medical and health resources in Liaoning Province,and provide references and guidance for relevant departments to optimize and balance the allocation of medical resources.Methods:Based on data from the Liaoning Provincial Bureau of Statistics,a comparative analysis was conducted on the development and allocation of medical resources in Liaoning Province from the dimensions of time and geography.Indicators such as Lorentz curve,Gini coefficient,and health resource density index were used to quantitatively evaluate the equity of medical and health resource allocation and distribution in Liaoning Province.Results:The allocation level of medical resources in central cities is relatively high,while the northwest region of the province is relatively weak.Conclusion:In recent years,the allocation of medical resources in various regions of the province has been improved,but differences still exist.These differences can be gradually reduced through policy guidance,introduction of information technology,and strengthening of human resource construction.

A high-throughput three-dimensional (3D) hepatocyte culture model is constructed in this study. It is capable of replicating the 3D in vivo environment and offers the advantages of high throughput, enhanced reproducibility, low cost, and simplified operation, rendering a valuable tool for hepatotoxicity screening of traditional Chinese medicine (TCM). First, we constructed the 3D high throughput liver chip model using collagen hydrogel. The precision and its difference with traditional cell culture plates were assessed using acetaminophen, Tripterygium hypoglaucum, and Qili San as the references. The feasibility of this model was also investigated by comparing the hepatotoxicity among four batches of T. hypoglaucum and Qili San. The methodology verification shows that the 3D hepatocyte model is better than traditional two-dimensional (2D) cell culture model in precision and feasibility. Subsequently, we compared the hepatotoxicity of different samples over a period of three or seven days and found that the hepatotoxicity of TCM extracts increased over time. Finally, we compared the hepatotoxicity of T. hypoglaucum and its compound formula Kunxian capsule under equivalent concentration. The results showed that the compound Kunxian capsule could significantly reduce hepatotoxicity of T. hypoglaucum. Generally, we constructed a high-throughput, robust 3D liver-on-a-chip model with the potential of rapid assessing TCM-induced liver toxicity.

Objective:To analyze the current situation of the development and allocation of medical and health resources in Liaoning Province,and provide references and guidance for relevant departments to optimize and balance the allocation of medical resources.Methods:Based on data from the Liaoning Provincial Bureau of Statistics,a comparative analysis was conducted on the development and allocation of medical resources in Liaoning Province from the dimensions of time and geography.Indicators such as Lorentz curve,Gini coefficient,and health resource density index were used to quantitatively evaluate the equity of medical and health resource allocation and distribution in Liaoning Province.Results:The allocation level of medical resources in central cities is relatively high,while the northwest region of the province is relatively weak.Conclusion:In recent years,the allocation of medical resources in various regions of the province has been improved,but differences still exist.These differences can be gradually reduced through policy guidance,introduction of information technology,and strengthening of human resource construction.

Objective:To analyze the current situation of the development and allocation of medical and health resources in Liaoning Province,and provide references and guidance for relevant departments to optimize and balance the allocation of medical resources.Methods:Based on data from the Liaoning Provincial Bureau of Statistics,a comparative analysis was conducted on the development and allocation of medical resources in Liaoning Province from the dimensions of time and geography.Indicators such as Lorentz curve,Gini coefficient,and health resource density index were used to quantitatively evaluate the equity of medical and health resource allocation and distribution in Liaoning Province.Results:The allocation level of medical resources in central cities is relatively high,while the northwest region of the province is relatively weak.Conclusion:In recent years,the allocation of medical resources in various regions of the province has been improved,but differences still exist.These differences can be gradually reduced through policy guidance,introduction of information technology,and strengthening of human resource construction.

Objective:To analyze the current situation of the development and allocation of medical and health resources in Liaoning Province,and provide references and guidance for relevant departments to optimize and balance the allocation of medical resources.Methods:Based on data from the Liaoning Provincial Bureau of Statistics,a comparative analysis was conducted on the development and allocation of medical resources in Liaoning Province from the dimensions of time and geography.Indicators such as Lorentz curve,Gini coefficient,and health resource density index were used to quantitatively evaluate the equity of medical and health resource allocation and distribution in Liaoning Province.Results:The allocation level of medical resources in central cities is relatively high,while the northwest region of the province is relatively weak.Conclusion:In recent years,the allocation of medical resources in various regions of the province has been improved,but differences still exist.These differences can be gradually reduced through policy guidance,introduction of information technology,and strengthening of human resource construction.

Objective:To analyze the current situation of the development and allocation of medical and health resources in Liaoning Province,and provide references and guidance for relevant departments to optimize and balance the allocation of medical resources.Methods:Based on data from the Liaoning Provincial Bureau of Statistics,a comparative analysis was conducted on the development and allocation of medical resources in Liaoning Province from the dimensions of time and geography.Indicators such as Lorentz curve,Gini coefficient,and health resource density index were used to quantitatively evaluate the equity of medical and health resource allocation and distribution in Liaoning Province.Results:The allocation level of medical resources in central cities is relatively high,while the northwest region of the province is relatively weak.Conclusion:In recent years,the allocation of medical resources in various regions of the province has been improved,but differences still exist.These differences can be gradually reduced through policy guidance,introduction of information technology,and strengthening of human resource construction.

Objective:To analyze the current situation of the development and allocation of medical and health resources in Liaoning Province,and provide references and guidance for relevant departments to optimize and balance the allocation of medical resources.Methods:Based on data from the Liaoning Provincial Bureau of Statistics,a comparative analysis was conducted on the development and allocation of medical resources in Liaoning Province from the dimensions of time and geography.Indicators such as Lorentz curve,Gini coefficient,and health resource density index were used to quantitatively evaluate the equity of medical and health resource allocation and distribution in Liaoning Province.Results:The allocation level of medical resources in central cities is relatively high,while the northwest region of the province is relatively weak.Conclusion:In recent years,the allocation of medical resources in various regions of the province has been improved,but differences still exist.These differences can be gradually reduced through policy guidance,introduction of information technology,and strengthening of human resource construction.