AIM To explore the effects of Kaixin Powder (Polygalae Radix,Ginseng Radix et Rhizoma,Poria and Acori tatarinowii Rhizoma) on hippocampal long-term potentiation (LTP) in vivo in APP/PS1 transgenic mice and expression of PSD-95 in hippocampus CA1 area and cerebral cortex.METHODS Thirty-two 3-monthold male APP/PS1 mice were randomly divided into model group,Donepezil [0.75 mg/(kg · d)] group,Kaixin Powder [1.5,3 g/(kg · d)] groups.C57/BL6 mice were used as the control group.Kaixin Powder and Donepezil were administered to the APP/PS1 mice for three months,respectively.Afterwards,the LTP in vivo was recorded in a perforant pathway-dentate gyrus in the hippocampus.Immunohistochemical method was used for measuring the expression of PSD-95 in hippocampus CA1 area and cerebral cortex.RESULTS The fEPSPs slopes were significantly decreased in the model group as compared with the control group.Kaixin Powder or Donepezil treatment significantly enhanced the fEPSPs slopes in the model group.The average optical density of PSD-95 positive cells in hippocampus CA1 area and cerebral cortex was obviously decreased in the model group.Donepezil increased the average optical density of PSD-95 positive cells in hippocampus CA1 area.Kaixin Powder [1.5 g/(kg · d)] increased the average optical density of PSD-95 positive cells in hippocampus CA1 area and cerebral cortex.Kaixin Powder [3 g/(kg · d)] increased the average optical density of PSD-95 positive cells in cerebral cortex.CONCLUSION Kaixin Powder can promote the LTP formation in APP/PS1 transgenic mice and enhance synaptic plasticity,which may be related to the regulation of protein expression of PSD-95.

Objective To investigate the value of strain rate imaging(SRI) in estimating the changes of left ventricular regional myocardial function in patients with coronary artery disease before and after coronary artery bypass grafting operation. Methods In sixteen patients with coronary artery disease, echoeardiography was performed 3 days before, 12 days after and 3 months after coronary artery bypass grafting operation respectively. SRI was used to quantitatively analyze the regional myocardial function of left ventricular wall. One hundred and ninety-two segments of left ventricular myocardium were analyzed in the study. The left ventricular myocardium was divided into segments with normal(152 segments) and abnormal(40 segments) wall motion according to two-dimensional echocardiography before the operation. Results Peak strain rate during systolic and early diastolic contraction (SRs, SRe) was not statistically significant between segments with normal and abnormal wall motion before operation. In segments with abnormal wall motion,myocardial peak strain rate of atrial contraction (SRa) was increased three months after operation comparing with three days before operation (P<0.05). In segments with normal wall motion,the absolute values of SRs,SRa and SRe were increased three months after operation comparing with three days before operation (P<0.05 and 0.01 ). SRs was increased three months after operation comparing with 12 days after operation (P<0.05 ). Conclusions SRI can be used to evaluate the functional changes of left ventricular regional myocardium quantitatively after coronary artery bypass grafting operation.

Objective To construct a eukaryotic expression system of IFN-λ,examine the expression of IFN-λand evaluate its bio-functions including anti-proliferation and anti-viral activity.Methods The genes of human IFN-λ1 /2 (hIFN-λ1 /2)were cloned from the mRNA of poly I∶C treated HuH-7 cells.The PCR product was examined with DNA sequencing.The genes of IFN-λ1 /2 were sub-cloned into pcDNA3 vector.The correct insertion of the gene IFN-λ1 /2 was identified with enzyme digestion.The constructed pcDNA3-IFN-λ1 /2 plasmids were transfected into COS-7 cells and IFN-λ1 /2 protein was checked in the supernatant and lysis of transfected cells using Western blotting analysis.The human esophageal carcinoma YES5 and T.Tn cells were treated with the IFN-λ1 /2 from the transfected cells and the proliferation of carcinoma cells were measured with CCK-8 kit.In the treated carcinoma cells,the apoptosis and antivirus related molecules such as caspase-3,ISG15 and MxA was analyzed with Western blotting or Quantitative real time PCR.Results The sequence of hIFN-λ1 /2 fragment matched that of the gene bank and the gene of the cytokines was inserted into pcDNA3 vector correctly.With Western blotting analysis,IFN-λ1 /2 protein was detected in the pcDNA3-IFN-λ1 /2 transfected COS-7 cells.The IFN-λ1 /2 from the transfected COS-7 cells inhibited the growth of YES5 and T.Tn cells, activated apoptosis related caspase-3,and up-regulated the anti-virus gene expression of ISG15 and MxA.Conclusion COS-7 cells can express IFN-λ1 /2 after transfection with pcDNA3-IFN-λ1 /2,suggesting that eukaryotic expression system of IFN-λis established.IFN-λ1 /2 from the system can perform bio-functions,such as proliferation inhibition,apoptosis induction and anti-viral gene up-regulation,which indicates that the system can contribute to further investigations of IFN-λbio-activity and its clinical application.

OBJECTIVE: Ambulance personnel who witness trauma experienced by patients have been reported to experience positive changes, known as vicarious posttraumatic growth (VPTG). We examined VPTG and its relationship with social support and resilience among ambulance personnel. METHODS: The sample (n=227) was recruited from six emergency centers in China. The measures included the Posttraumatic Growth Inventory (PTGI), the Social Support Rating Scale (SSRS), and the 10-item Connor-Davidson Resilience Scale (CD-RISC-10). Structure Equation Modeling (SEM) and the bootstrapping procedure were used to examine indirect effects. RESULTS: The participants' mean score for VPTG was 68.96 (SD=15.51). Social support had significant direct effects on resilience (β=0.51, p < 0.001) and VPTG (β=0.25, p=0.001), and resilience (β=0.58, p < 0.001) had a significant direct effect on VPTG. Furthermore, social support had a significant indirect effect (0.51×0.58=0.30, p < 0.001) on VPTG through resilience. CONCLUSION: Although the nature of the work of ambulance personnel is not expected to change, the negative effects of the trauma they encounter can be reduced by providing them with more support resources and interventions to foster their resilience, which in turn, promote VPTG.
Ambulances* ; China* ; Emergencies ; Humans

OBJECTIVETo discuss the application of right-inferior-posterior "artery first" approach in laparoscopic pancreaticoduodenectomy.

METHODSClinical data of 17 patients who underwent laparoscopic pancreaticoduodenectomy through right-inferior-posterior "artery first" approach in our department from February 2014 to April 2015 were retrospectively analyzed. The operation began at the inferior flexure of duodenum. After entering the Toldt's space, the left renal vein (LRV) was revealed and the root of superior mesenteric artery (SMA) was exposed just above the LRV. SMA was dissected along its trunk till the horizontal part of duodenum.

RESULTSOf these 17 cases, adenocarcinoma of pancreatic head was observed in 5 cases, adenosquamous carcinoma in 2 cases, mucinous cycstic neoplasm in 1 case, adenocarcinoma of lower common bile duct in 4 cases, and duodenal papilla cancer in 5 cases. Fifteen cases were accomplished successfully with laparoscopy and 2 cases were converted to open approach. The average operating time was (320 ± 85) min and mean intraoperative blood loss was (305 ± 175) ml. The cutting margins were tumor negative in all the patients. The average number of harvested lymph node was 15.4 ± 6.5. Postoperative complication occurred in 5 cases. Two cases of bile leakage and 2 cases of pancreatic fistula were cured with conservative treatment. One case of delayed abdominal hemorrhage was resolved with reoperation.

CONCLUSIONRight-inferior-posterior "artery first" approach is safe and feasible in laparoscopic pancreaticoduodenectomy.

Adenocarcinoma ; Duodenal Neoplasms ; Duodenum ; Humans ; Laparoscopy ; Mesenteric Artery, Superior ; Operative Time ; Pancreas ; Pancreaticoduodenectomy ; Postoperative Complications ; Retrospective Studies

Objective To study the effects of the myristoyl-glycine modified peptide which derived from the second intracellular loop of sphingosine 1-phosphate receptor 3 (S1PR3) on activation of mitogenactivated protein kinases (MAPKs) pathway.Methods The phosphorylation levels of JNK and ERK in THP-1 cells were detected by western blot after GPS-725.017 stimulation.Statistical data analysis was conducted by multivariate analysis of variance.Results Western blot showed that 10 min after 30 μmol/L or 50 μmol/L GPS-725.017 stimulated,phosphorylation of ERK significantly increased in comparison with the solvent-treated group [30 μmol/L group:(3.10 ± 0.27) vs.(7.98 ± 0.45),P ＜ 0.01;50 μmol/L group:(4.78 ±0.44) vs.(25.98 ±2.32),P ＜0.01];after 50 μmol/L GPS-725.017 stimulated THP-1 cells for 5 min,10 min,20 min or 30 min,p-ERK or p-JNK level raised at different time points (P ＜0.01vs.solvent group).Conclusions GPS-725.017,a kind of myristoyl-glycine modified peptide derived from S1 PR3,could traverse cytomembrane and activate MAPKs pathway.This study provides an implication of targeting S1PR3 for clinical therapy on inflammatory diseases or sepsis.

Objective:To analyze the application of indocyanine green (ICG) fluorescence imaging in laparoscopic resection of pancreatic cancer.Methods:Data of 15 patients undergoing laparoscopic surgery for pancreatic cancer in the Department of Hepatobiliary Surgery of the First Affiliated Hospital of Wannan Medical College from June 2022 to March 2023 were retrospectively analyzed, including 13 males and 2 females, aged (67.0±8.6) years. ICG were intraoperatively injected to visualize the lesion and guide surgical resection. The surgical methods, postoperative pathology, ICG fluorescence imaging and tumor margins were reviewd.Results:Among the patients, seven underwent laparoscopic pancreaticoduodenectomy, seven underwent laparoscopic radical antegrade modular pancreaticosplenectomy, and one conversed to open pancreaticoduodenectomy due to combined superior mesenteric vein reconstruction. Postoperative pathology confirmed pancreatic moderately differentiated adenocarcinoma in nine cases, pancreatic moderately-low differentiated adenocarcinoma in four cases, pancreatic follicular cell carcinoma in one case, and inflammatory lesion in one case. Negative surgical margins were confirmed in all cases. Pancreatic lesion were visualized in 14 cases (fluorescent delineation of the tumor capsule) but not well visualized in one case (with moderately differentiated adenocarcinoma). In the case of inflammatory disease, the lesion parenchyma were visualized.Conclusion:ICG injection in laparoscopic surgery enables visualization of pancreatic tumor, which facilitates tumor localization and margin determination.

Objective:To evaluate the efficacy and safety of endoscopic biliary drainage for biliary fistula.Methods:Data of consecutive 409 biliary fistula patients who were treated and diagnosed at the First Medical Center of Chinese PLA General Hospital from November 2002 to November 2022 were reviewed, and 53 patients who received endoscopic retrograde cholangiopancreatography (ERCP) drainage were finally included. General information, procedural conditions, clinical outcomes and adverse events were analyzed. The patients were categorized into two groups: the endoscopic retrograde biliary drainage (ERBD) group ( n=46) and the endoscopic nasobiliary drainage (ENBD) group ( n=7). Procedural characteristics, operation outcomes, and operation time were compared between the two groups. Results:There were 36 males and 17 females, with the age of 52.2±12.7 years, among whom 58.5% (31/53) were secondary to cholecystectomy. Clinical success was achieved in 83.0% (44/53) patients, with the operation time of 27.0 (13.5, 33.5) minutes and the treatment session of 1 (1, 2). The time to resolution was 89 (47, 161) days. The success rate of ERCP for low-grade biliary fistula was higher compared with that of high-grade biliary fistula [96.4% (27/28) VS 68.0% (17/25), χ2=7.57, P=0.006]. Bridging drainage achieved higher success rate compared with that of non-bridging drainage [91.7% (33/36) VS 64.7% (11/17), χ2=5.95, P=0.015], while different diameters of stents (≥10 Fr VS <10 Fr) achieved similar success rate [81.8% (27/33) VS 84.6% (11/13), χ2=0.05, P=0.822]. Adverse events occurred in 10 patients (18.9%), including 6 pancreatitis, 2 bleeding, 1 cholangitis and 1 death. Except for 1 death, 9 other adverse events were mild and managed with conservative treatment without interventions. There was no significant difference in clinical success rate [6/7 VS 82.6% (38/46), χ2=0.04, P=0.838] or the median operation time [28.0 min VS 23.0 min, Z=0.38, P=0.774] between ENBD group and ERBD group. Conclusion:Endoscopic biliary drainage is safe and effective for biliary fistula. ENBD and ERBD have comparable clinical efficacy. ERCP for low-grade biliary fistula may achieve a higher success rate, and bridging drainage may facilitate fistula resolution.

Objective:To investigate the current status of women′s level of birth experience and lactation initiation time and explore the effect of level of birth experience on lactation initiation time.Methods:This was a cross-sectional study. A convenience sampling method was used to select 622 maternal cases attending the Affiliated Hospital of Jining Medical College from November, 2020 to January, 2021, and the distribution of their labor experience level and lactation initiation time was investigated by questionnaire and follow-up assessment.Results:There were 622 women with transvaginal deliveries who had lactation initiation times of more than 72 h in 241 cases (38.75%). The scores for each dimension of the Childbirth Experience Questionnaire (CEQ) were (49.63 ± 8.58)points, and the scores for each dimension of CEQ were perceived safety, professional support, involvement and self-efficacy in descending order. The results of the correlation analysis showed that there was a negative correlation between the scores on each dimension of CEQ and the total score and lactation initiation time ( r values were -0.436 to -0.146, all P<0.01). Stratified regression analysis showed that after controlling for age, number of births, gestational weeks of labour, illness during pregnancy and labour analgesia as the underlying variables affecting lactation initiation time, the scores for self-efficacy, involvement, perceived safety and professional support in the CEQ all affected lactation initiation time after delivery ( t values were -6.76 to -2.02, all P<0.05). Conclusions:The birth experience and lactation of women who deliver via vaginal birth need to be taken into account. The more negative the birth experience, the longer the lactation initiation time. The women′s involvement in the birth process, their own competence, perceived safety and level of professional support are all valid influencing indicators of lactation initiation time.

Objective:To purify H5N1 influenza virus concentrate prepared by MDCK cells with a new mixed-mode chromatography medium Capto Core700 and the traditional medium Sepharose 4FF, and to compare the separation and purification efficacy of the two media.Methods:Capto Core700 and Sepharose 4FF were used to purify inactivated H5N1 influenza virus concentrate. The morphology of virus particles in different samples was then observed under a transmission electron microscope. Single radial immunodiffusion (SRID), Folin-Phenol (Lowry) method, double-antibody sandwich ELISA and qPCR were used to detect hemagglutinin, total protein, host cell protein (HCP) and host cell DNA (HCD) before and after purification. The recovery rate of virus antigen and the removal rate of impurities were calculated. The immunogenicity of the viruses purified with different media was analyzed using animal experiments. Difference in the purification efficacy of the two chromatography media was analyzed by t-test. Results:H5N1 influenza viruses purified by Capto Core700 or Sepharose 4FF showed the typical influenza virus morphology under transmission electron microscope. There was no significant difference in the recovery rate of hemagglutinin between the two chromatography media ( P>0.05), but compared with Sepharose 4FF, Capto Core700 had a higher removal rate of impurities (total protein, HCP, HCD) and the difference was statistically significant ( P<0.05). Animal experiments showed that the viruses purified by the two chromatography media had good immunogenicity. Conclusions:Compared with Sepharose 4FF chromatography medium, Capto Core700 could more effectively remove process-related impurities such as HCP, HCD and total protein without affecting the recovery rate of viral antigen. This study provided reference for the development of purification technology in the production of H5N1 influenza virus vaccine in MDCK cells.