Objective:To evaluate the effect of propofol on proliferation of neural stem cells (NSCs) in mice and the role of specificity protein-1 (Sp-1)-epidermal growth factor receptor (EGFR)-protein kinase B (Akt) signaling pathway.Methods:Primary NSCs harvested from both the cortices and hippocampus of C57BL/6 mouse embryos were identified by immunofluorescent staining of Nestin.NSCs at passages 3-6 were divided into 3 groups ( n=21 each) using a random number table method: normal saline control group (C group), propofol group (P group) and propofol plus Sp1 inhibitor plicamycin group (PP group). Propofol at a final concentration of 10 μmol/L was added in group P. Propofol at a final concentration of 10 μmol/L and plicamycin at a final concentration of 100 nmol/L were added in group PP.The equal volume of normal saline was added in group C. The medium was replaced after 6 h of incubation and the cells were continuously incubated.The proliferation of NSCs was assessed by direct cell counting at 24, 36, 48, 60 and 72 h after the end of treatment with drugs.At 6 h after the end of treatment with drugs, the expression of Sp1 and EGFR mRNA was detected by real-time fluorescent quantitative polymerase chain reaction, and the expression of Sp1, Akt and phosphorylated Akt (p-Akt) by Western blot. Results:Compared with group C, the count of NSCs was significantly increased at 48, 60 and 72 h after treatment with drugs, and the expression of EGFR mRNA, Sp1 protein and mRNA and p-Akt was up-regulated in group P ( P<0.05 or 0.01), and no significant change was found in each parameter in group PP ( P>0.05). Compared with group P, the count of NSCs was significantly decreased at 48 and 60 h after treatment with drugs, and the expression of EGFR protein and mRNA and p-Akt was down-regulated in group PP ( P<0.05 or 0.01). Conclusions:Propofol can promote the proliferation of NSCs, and the mechanism may be related to activation of Sp1-EGFR-Akt signaling pathway in mice.

Objective In order to optimize the perioperative anesthesia management for ESDR patients undergoing arteriovenous fistula,we compared the impact of brachial plexus nerve block and other anesthesia methods on the long-term patency rate of arteriovenous fistula after surgery.Methods In this study,2 parts of work were conducted.Part Ⅰ,a retrospective cohort study:ESRD patients who underwent arteriovenous fistulas in the First Affiliated Hospital of Sun Yat-sen University from January 1,2017 to August 30,2022 were selected.According to the method of anesthesia,patients were divided into BPB group(180 cases)and local anesthesia(LA)group(332 cases).The basic characteristics,postoperative follow-up,fistula patency rate and postoperative complications were collected and statistically analyzed.Part Ⅱ:Meta-analysis:All relevant literatures from CNKI,Wanfang,PubMed,Web of Science,Cochrane Library and Scopus databases were searched up to April 2024,literature screening and data extraction were conducted according to inclusion and exclusion criteria,and data analysis was performed using RevMan 5.3.Results The first part of the retrospective study showed that the primary patency rate in the BPB group was significantly different from that in the local anesthesia group at 1 month and 12 months postsurgery(96.6％vs 91.7％,P＜0.05;68.3％vs 59.0％,P＜0.05),and the patency rate after intervention was significantly different at 1 month,3 months and 12 months(100.0％vs 95.5％,P＜0.05;96.5％vs 86.3％,P＜0.05;85.0％vs 70.8％,P＜0.05).There was no significant difference in postoperative infection,thrombosis and hematoma complications(P＞0.05).The second part of the Meta-analysis results showed that there was a statistically significant difference in the primary patency rate of BPB compared with other anesthesia methods(SMD=1.51,95％CI:1.17～1.96,P＜0.05),and there was no statistically significant difference in postoperative infection and thrombosis complications(P＞0.05).Conclusion As a consequence,BPB has obvious advantages over other anesthesia methods in maintaining long-term patency of upper limb arteriovenous fistula,and it has comparable safety with other anesthesia methods.