Objectives To explore the expression, biological function, and mechanism of MKI67 in pancreatic cancer and its clinical significance. Methods The expression level, diagnosis, and prognostic value of MKI67 in pancreatic cancer were analyzed using public databases. We also investigated the association between the MKI67 with immune cell infiltration and immune checkpoint molecules. We analyzed the functional pathway enrichment to uncover the possible molecular mechanisms. qRT-PCR and Western blot assay were used to verify the expression of MKI67 mRNA and protein. Immunohistochemistry staining was used to detect the expression of MKI67 in tissue protein. Results The high expression of MKI67 was significantly associated with high histological grades and poor outcomes in pancreatic cancer. High MKI67 expression was correlated with poor prognosis of pancreatic cancer patients (P=0.009). MKI67 was an independent risk factor for the patient outcome (95%CI: 1.084-1.743, P<0.05). The MKI67 expression was positively correlated with the helper T cell 2 levels but negatively correlated with plasmacytoid DC, NK cells, mast cells, the T follicular helper, immune DC, and CD8 T cells. Conclusion MKI67 may serve as a biomarker for the diagnosis and prognosis of pancreatic cancer and the mechanism might be associated with immune escape or immunosuppression.

Objective:To study the risk factors of venous thromboembolism(VTE)and the predictive value of the improved VTE score model to identify the risk of VTE in gynecological surgery patients.Methods:From Janu-ary 1,2020 to December 31,2022,41 patients with VTE after gynecological surgery were selected as the VTE group,and a total of 164 patients with adjacent gynecological surgeries during the same period were selected as the non-VTE group with a ratio of 1 :4.Univariate and multivariate Logistic regression analysis were used to ana-lyze the risk factors of VTE after gynecological surgery,and a modified VTE risk factor rapid assessment model(referred to as the improved VTE score model)was constructed.The receiver operating characteristic(ROC)curve was used to study the predictive value for VTE for in gynecological surgery,and compared with the Caprini score model(Caprini table for short).Results:①Multivatiate Logistic regression analysis showed that there were independent risk factors for postoperative VTE in gynecology surgery(OR＞1,P＜0.05),including age≥60 years,BMI≥28 kg/m2,malignant tumors,surgery time＞3 hours,history of thrombosis,and the increased D-di-mer difference before and after surgery.②The Area under Curve(AUC)of ROC was 0.963 in the improved VTE score model with a Youden index 81.10％,sensitivity 87.80％and specificity 93.29％.The AUC of the Caprini score model was 0.888 with Youden index 63.41％,sensitivity 73.17％and specificity 90.24％.The improved VTE score model the Caprini score model identified 92.68％and 85.37％of VTE patients as high-risk or ex-tremely high-risk,respectively,but the difference was not statistically significant(P＜0.05).Conclusions:More attention should be paid to the six independent risk factors for postoperative VTE in gynecology surgery.The two score models showed a similar identified level.However,the improved VTE score model is more simple and easier to operate,has better practicality,and has certain clinical promotion value.

Objective To investigate the potential value of exosomes derived from rat ectoderm mesenchymal stem cells(EMSCs-exo)for repairing secondary spinal cord injury.Methods EMSCs-exo were obtained using ultracentrifugation from EMSCs isolated from rat nasal mucosa,identified by transmission electron microscope,nanoparticle tracking analysis(NTA),and Western blotting,and quantified using the BCA method.Neonatal rat microglia purified by differential attachment were induced with 100 μg/L lipopolysaccharide(LPS)and treated with 37.5 or 75 mg/L EMSCs-exo.PC12 cells were exposed to 400 μmol/L H2O2 and treated with EMSCs-exo at 37.5 or 75 mg/L.The protein and mRNA expressions of Arg1 and iNOS in the treated cells were determined with Western blotting and qRT-PCR,and the concentrations of IL-6,IL-10,and IGF-1 in the supernatants were measured with ELISA.The viability and apoptosis of PC12 cells were detected using CCK-8 assay and flow cytometry.Results The isolated rat EMSCs showed high expressions of nestin,CD44,CD105,and vimentin.The obtained EMSCs-exo had a typical cup-shaped structure under transmission electron microscope with an average particle size of 142 nm and positivity for CD63,CD81,and TSG101 but not vimentin.In LPS-treated microglia,EMSCs-exo treatment at 75 mg/L significantly increased Arg1 protein level and lowered iNOS protein expression(P<0.05).EMSCs-exo treatment at 75 mg/L,as compared with the lower concentration at 37.5 mg/L,more strongly increased Arg1 mRNA expression and IGF-1 and IL-10 production and decreased iNOS mRNA expression and IL-6 production in LPS-induced microglia,and more effectively promoted cell survival and decreased apoptosis rate of H2O2-induced PC12 cells(P<0.05).Conclusion EMSCs-exo at 75 mg/L can effectively reduce the proportion of M1 microglia and alleviate neuronal apoptosis under oxidative stress to promote neuronal survival,suggesting its potential in controlling secondary spinal cord injury.

Objective To investigate the potential value of exosomes derived from rat ectoderm mesenchymal stem cells(EMSCs-exo)for repairing secondary spinal cord injury.Methods EMSCs-exo were obtained using ultracentrifugation from EMSCs isolated from rat nasal mucosa,identified by transmission electron microscope,nanoparticle tracking analysis(NTA),and Western blotting,and quantified using the BCA method.Neonatal rat microglia purified by differential attachment were induced with 100 μg/L lipopolysaccharide(LPS)and treated with 37.5 or 75 mg/L EMSCs-exo.PC12 cells were exposed to 400 μmol/L H2O2 and treated with EMSCs-exo at 37.5 or 75 mg/L.The protein and mRNA expressions of Arg1 and iNOS in the treated cells were determined with Western blotting and qRT-PCR,and the concentrations of IL-6,IL-10,and IGF-1 in the supernatants were measured with ELISA.The viability and apoptosis of PC12 cells were detected using CCK-8 assay and flow cytometry.Results The isolated rat EMSCs showed high expressions of nestin,CD44,CD105,and vimentin.The obtained EMSCs-exo had a typical cup-shaped structure under transmission electron microscope with an average particle size of 142 nm and positivity for CD63,CD81,and TSG101 but not vimentin.In LPS-treated microglia,EMSCs-exo treatment at 75 mg/L significantly increased Arg1 protein level and lowered iNOS protein expression(P<0.05).EMSCs-exo treatment at 75 mg/L,as compared with the lower concentration at 37.5 mg/L,more strongly increased Arg1 mRNA expression and IGF-1 and IL-10 production and decreased iNOS mRNA expression and IL-6 production in LPS-induced microglia,and more effectively promoted cell survival and decreased apoptosis rate of H2O2-induced PC12 cells(P<0.05).Conclusion EMSCs-exo at 75 mg/L can effectively reduce the proportion of M1 microglia and alleviate neuronal apoptosis under oxidative stress to promote neuronal survival,suggesting its potential in controlling secondary spinal cord injury.

Objective A sterile golden hamster model was established by cesarean section purification.Methods SPF-grade donor female golden hamsters were selected,and males and females were mated 1∶1 and separated after mating.The cage time of the surrogate mothers was 1 week earlier than that of the donor mothers.Parturient golden hamsters underwent hysterectomy on a sterilized workbench,and the uteruses were transferred into isolation kits and stripped.To obtain sterile milk for milk replacement,sterile ICR mice and sterile SD rats were used.After successful separation,the hamsters were transferred to isolation kits to prepare for feeding.The sterility status of the feeding isolation kits was tested monthly.Results Three caesarean sections were performed,but the first and second lactations failed.The third milk replacement was successful,and 18 young hamsters were obtained with survival rates of 88%and 66%after weaning.All hamsters were quality tested by GB/T 14926.41-2001.Conclusions Using a cesarean section purification technique and sterile ICR mice and SD rats for microbial-free milk replacement,a sterile golden hamster model was obtained.

Objective To explore the role of transcription factor EB(TFEB)induced by aerobic exer-cise in improving insulin resistance(IR)of skeletal muscles in high-fat diet mice.Method Eighteen male SPF C57BL/6 mice aged 6 weeks were randomly divided into a common diet group(CON),a high-fat diet group(HFD),and a high-fat diet exercise group(HFDE),each of 6.Both high-fat groups were on high-fat diet for 12 weeks.Then the HFDE group underwent daily 60-minute tread-mill exercise with the slope of 0°,at a speed of 12 m/min,5 times per week for 12 weeks.Finally,the glucose tolerance and insulin sensitivity were detected using the intraperitoneal injection glucose tol-erance test(IPGTT)and intraperitoneal injection insulin tolerance test(IPITT).The fasting blood glu-cose and insulin contents were measured by biochemical method,and the IR level was calculated by using the homeostatic model assessment of insulin resistance(HOMA-IR).Moreover,Western blotting was employed to detect the expression of phosphorylated transcription factor EB(pTFEB)and TFEB in skeletal muscle,glucose transporter 4(GLUT4)in cytoplasm and membrane,phosphorylated insulin re-ceptor substrates1(pIRS1),phosphorylated protein kinase B(pAKT),phosphoinositide 3-kinase(PI3K),and phosphorylated akt substrate of 160 kD(pTBC1D4)in skeletal muscle.The correlation of pTFEB and TFEB to insulin signaling pathway-related proteins was analyzed.Results(1)Compared with the CON group,there was a significant increase in the average body weight,IPGTT,blood glucose at each time point of IPGTT,area under curve(AUC),serum insulin,HOMA-IR,protein expressions of pTFEB,total-TFEB and GLUT4 in cytoplasm of the HFD group(P<0.01),but a significant decrease in the average protein expressions of pIRS1,pAKT,PI3K,pTBC1D4 and GLUT4 in cell membrane of skeletal muscles(P<0.01).However,no significant differences were found between the two groups in the average expression of pTFEB and T-TFEB proteins.(2)Compared to the HFD group,a signifi-cant increase was found in the average body weight,blood glucose at each time point of IPGTT,blood glucose of IPITT at 0 min,30 min and 60 min and AUC,serum insulin,HOMA-IR,expres-sions of pTFEB,T-TFEB and GLUT4 in cytoplasm of HFDE group(P<0.05 or P<0.01),with a signifi-cant decrease in the average protein expressions of pIRS1,pAKT,PI3K,pTBC1D4 and GLUT4 in cell membrane and T-TFEB in nucleus(P<0.01).(3)TFEB was negatively correlated with the expres-sion of pIRS1,PI3K,pAKT,and pTBC1D4 proteins(r=-0.8642,r=-0.7789,r=-0.8946,r=-0.8040)but positively correlated with cytoplasmic GLUT4(r=0.8532,P<0.01).Moreover,TFEB in the nucleus was of positive correlation with GLUT4 in the cell membrane(r=0.7744,P<0.01).Conclusions High-fat diet can decrease the expression of insulin signaling pathway related proteins in skeletal mus-cles of mice and weaken their insulin action,leading to the disorder of glucose and lipid metabolism.However,aerobic exercise can significantly increase the expression of such proteins to promote insulin function and sensitivity,and relieve disorders in glucose and lipid metabolism.This effect may be achieved through the promotion of skeletal muscle TFEB nuclear translocation,which activates IRS1/PI3K/AKT/TBC1D4/GLUT4 signaling pathway and facilitates GLUT4 membrane translocation,ultimately enhancing glucose uptake in skeletal muscle cells.The authors speculate that the TFEB-mediated insu-lin signaling pathway may be an important molecular pathway for aerobic exercise to improve insulin re-sistance.

The pursuit of cosmetic effects in post-surgical wounds has led to the development of ultra-minimally invasive techniques in surgery. Minimal invasive surgery has replaced open surgery and has become the new gold-standard for treating diseases. One such technique is the single incision triangulated umbilicus surgery (SITUS), which offers several advantages over traditional laparoscopic and other scarless surgeries, including reduced trauma, faster recovery, and better cosmetic outcomes. SITUS also has a short learning curve, aligns with conventional instrumentation operating habits, and can be used for whole abdominal surgeries. Chinese scholars have made further improvements to the SITUS technology, including expanding its applicability in intra-abdominal surgery and refining its incision closure methods to achieve superior cosmetic results. Currently, SITUS technology is experiencing rapid development in urology applications and has demonstrated satisfactory results in both domestic and international reports. This review aims to discuss the effectiveness and development of the SITUS technique in urology.

Objective:To explore the therapeutic mechanism of electroacupuncture(EA)in treating Parkinson disease(PD)using Tandem mass tag(TMT)quantitative proteomics technology. Methods:Forty-eight PD patients were randomly divided into a control group and an observation group,with 24 patients in each group.The control group received routine drug treatment,while the observation group received EA in addition to the routine drug treatment.EA was administered for 30 min per session,3 times a week,for a total of 12 weeks.Nine patients from each group were randomly selected to provide peripheral blood serum samples before and after treatment for TMT quantitative proteomics analysis.Differentially expressed proteins between the two groups were compared,and bioinformatics analysis was performed.The screened differentially expressed proteins were validated using enzyme-linked immunosorbent assay(ELISA). Results:In the observation group,scores on the unified Parkinson disease rating scale(UPDRS),UPDRS Ⅱ,and UPDRS Ⅲ were significantly reduced after treatment(P<0.05).In the control group,these scores tended to increase,but the changes were not statistically significant(P>0.05).After treatment,the UPDRS and UPDRS Ⅲ scores in the observation group were significantly lower than those in the control group(P<0.05).The observation group showed 62 differentially expressed proteins,while the control group had 36.Compared to the control group,the observation group had 142 differentially expressed proteins.These proteins were primarily involved in the cyclic adenosine monophosphate(cAMP)signaling pathway,T helper(Th)1 and Th2 cell differentiation,ATP-binding cassette transporter,vascular endothelial growth factor signaling pathway,and high-affinity immunoglobulin E receptor(FcεRI)signaling pathway.ELISA verification indicated that after EA treatment,the levels of α-Synuclein(αSyn)and heat shock protein beta 1(HSPB1)in the observation group were significantly lower than those in the control group(P<0.05),while the regulator of G-protein signaling 10(RGS10)level was significantly higher(P<0.05). Conclusion:EA,combined with routine drug therapy,can significantly improve clinical symptoms of PD,potentially through the regulation of the cAMP signaling pathway and the contents of differentially expressed proteins of αSyn,HSPB1,and RGS10.

Objective Using different sterilization method to sterilize pig specific formula milk powder,exploring the sterilization method and conditions that minimize the loss of nutritional components in formula milk powder.Methods Pig-specific formula milk powder was divided into high-pressure sterilization and irradiation sterilization groups.Formula milk powder in the high-pressure group was sterilized using different sterilization conditions and that in the irradiation group was sterilized using different 60 Co γ-radiation doses.The sterility and the nutritional contents of the sterilized formula milk powders were determined according to national standards.Results The sterility tests for both groups of formula milk powder were negative.Compared to control group,the crude protein contents were significantly lower in formula in the high-pressure group sterilized at 121℃for 30 min and in the irradiation liquid group sterilized at 50 kGy(P<0.01).The water,crude protein,and calcium contents were significantly lower(P<0.001)in the irradiation group sterilized at 50 kGy.There was no significant difference in the valine,isoleucine,or leucine content under 50 kGy sterilization conditions in the irradiation sterilized group,but all amino acid contents were decreased in the high-pressure sterilization and irradiation sterilized liquid groups(P<0.001).Analysis of trace elements showed an increased iron content(P<0.001)in formula sterilized at 121℃for 30 min in the high-pressure sterilization group,increased iron and potassium contents(P<0.001)under 25 kGy sterilization conditions in the irradiation sterilization liquid group,and increased magnesium content(P<0.01).The magnesium(P<0.05)and sodium contents(P<0.01)differed significantly in formula treated under 50 kGy sterilization conditions in the irradiation sterilized powder group.VE and VB2 contents were increased in formula sterilized at 121℃for 30 min in the high-pressure sterilization group(P<0.001),the VE content was increased(P<0.05)and the VB2 content was decreased(P<0.001)in formula sterilized under 50 kGy conditions in the irradiation sterilization liquid group,and the VE and VA contents were decreased in formula sterilized at 25 kGy in the irradiation sterilized powder group(P<0.001).Conclusions Sterilization at 121℃for 30 min result ed in the least loss of nutritional components in the high-pressure sterilization group,while irradiation sterilization result ed in the least loss of nutrients at a dose of 50 kGy.Comparing the two sterilization method,irradiation of milk powder at 50 kGy result ed in the least loss of nutrient content.

Objective: To understand the infectious disease prevention and control among primary and secondary schools in Hebei Province from 2019 to 2021 and to provide a scientific basis for promoting epidemic prevention and control in schools. Methods: Relevant indicators of infectious disease prevention and control in primary and secondary schools were collected and screened from the on site supervision and inspection data uploaded from various places, and analyzed with SPSS 22.0 software. Results: The qualified rates of infectious disease prevention and control in primary and secondary schools in Hebei Province from 2019 to 2021 were 77.11%, 89.74% and 96.24%, respectively, the difference was statistically significant( χ 2=455.45, P <0.01). The qualified rates of infectious disease prevention and control in primary schools, middle schools and high schools from 2019 to 2021 increased by year, the difference was statistically significant( χ 2=319.49, 118.74, 25.73, P <0.05). The qualified rates of six infectious disease prevention and control indicators such as morning inspection record, special person responsible for epidemic report, registration record of absence due to illness increased by year, the difference was statistically significant( χ 2=140.34, 9.10, 113.55 , 163.71 , 286.74, 329.18, P <0.05). Conclusion Steady improvement in school infectious disease prevention and control has been observed, while qualification rate in primary school and rural area still need to be improved, with missing or late report. Government support and talent policy, hardware and sofeware construction, as management level should be strengthened.