Objective: To investigate the feasibility of magnetic anastomosis for uretero-ileal anastomosis using experimental rabbit models. Methods: Six experimental rabbits were used as the models.The lower part of the left ureter was cut with scissors，the daughter magnet (DM) was placed in the middle of the ureter，and the distal end of the ureter was ligated.After that，the ileum wall was opened，the parent magnet (PM) was inserted through it，the positions of the PM and DM were adjusted so that their ends were attracted to each other，and then ileum wall incision was sutured.The operation time，intraoperative blood loss，postoperative complications and magnet discharge time were recorded.Two weeks after operation，left ureterography was performed to obtain the specimens of the uretero-ileal anastomosis，and to observe the patency of the anastomosis.The formation of the anastomosis was observed with naked eyes and light microscope. Results: Uretero-ileal magnetic anastomosis was performed successfully in 6 experimental rabbits.The operation time was 28-39（32.50±3.94） min，and the intraoperative blood loss was less than 5 mL.The rabbits recovered well after operation，and no complications were observed.All animals survived to the end point of observation.The disconnection time of magnet after operation was 9-13(10.83±1.72) days.The gross specimen showed that the anastomosis was patent.The histological observation showed that the mucosa of the anastomosis was continuous and smooth，and the anastomosis was well formed. Conclusion: Magnetic anastomosis is feasible for uretero-ileal anastomosis with simple operation and good anastomosis formation.After further experimental verification，this technique is expected to be used in clinical practice.

Objective To evaluate the feasibility of establishing canine rectovaginal fistula ani-mal model using magnetic surgery techniques.Methods Ten female Beagle dogs were randomly di-vided into study group(n=5)and control group(n=5).The study group underwent rectovaginal fistula modeling using magnetic surgery technology,while the control group was subjected to sharp puncture of the rectovaginal septum followed by indwelling rubber tube placement to establish the model.Surgical procedure duration and postoperative adverse events were recorded in both groups.Two weeks later,the magnets and rubber tubes were removed.The formation of rectovaginal fistulas in the animals of two groups was observed,and the success rates of model construction of two groups were statistically analyzed.Results Both groups successfully completed the preparation of the recto-vaginal fistula models.The operative time in both groups was less than 2 minutes.No adverse events such as magnet detachment were observed in the study group during the postoperative period.In the control group,the rubber tube dislodged on day 6 post-surgery in one dog,leading to spontaneous healing of the fistula.Two weeks after surgery,the magnets and rubber tubes were removed.Naked-eye observation showed that the rectovaginal fistula formed well in the experimental dogs of the study group,while the rectovaginal fistula formed well in 4 experimental dogs in the control group.The success rate of model construction in the study group was 100％,and was 80％in the control group.Conclusion The construction of a canine rectovaginal fistula model by magnetosurgical techniques has the advantages of simple operation and high success rate.Magnetosurgical techniques may serve as an ideal animal model for constructing and studying the histopathological changes and treatment methods of rectovaginal fistulas.

Objective To simulate modern social stress using a pre-pregnancy chronic mild stress(CMS)model and to explore the mechanisms of emotional,behavioral,and neurodevelopmental changes in male offspring of pre-pregnancy liver qi stagnation female mice through corticosterone(CORT)-brain-derived neurotrophic factor(BDNF)extracellular signal-regulated kinase(ERK)1/2 signaling cascade-mediated hippocampal injury.This study aimed to elucidate the impact of negative life events on offspring and the interventional mechanism of Shuyu Capsules.Methods CMS stress was used to induce pre-pregnancy depression in female rats(liver qi stagnation state),followed by intervention with Shuyu and fluoxetine capsules.After screening,male rats were mated and 12 male offspring from each group were selected for behavioral testing and detection of serum CORT levels by enzyme-linked immunosorbent assay.BDNF,ERK1/2,phospho(p)-ERK1/2,cAMP-response element binding protein(CREB),and p-CREB protein levels in the hippocampus were detected by Western Blot,and BDNF,ERK1,ERK2,and CREB mRNA levels in the hippocampus were detected by reverse transcription-polymerase chain reaction(RT-PCR),to verify the effects of pre-pregnancy CMS on the BDNF-ERK1/2-CREB signaling pathway and to investigate the key micro-mechanisms of Shuyu Capsules on emotional and learning memory-related behaviors of male offspring of females with pre-pregnancy liver qi stagnation syndrome.Results The distance,number of entries,and duration of stay in the central area in open-field experiments were significantly reduced in offspring in the model group(all P＜0.05).The escape latency during the exploration period of the water-maze experiment was significantly prolonged(P＜0.05)and the swimming distance,duration of the target quadrant,and number of platform crossings were significantly reduced(P＜0.05,P＜0.05,P＜0.01),the suspension time and frequency in the forced-swimming experiment were increased(P＜0.05,P＜0.01),and the incubation period was shortened(P＜0.05)in offspring in the model group.Prophylactic treatment with Shuyu Capsules and fluoxetine improved the depression-like behavior and cognitive impairment in the offspring in the model group.Biochemical tests showed that CORT levels were increased in the CMS model group(P＜0.05),BDNF,p-ERK1/2,and p-CREB protein levels in the hippocampus were decreased(all P＜0.05),and BDNF,ERK1,ERK2,and CREB mRNA levels were significantly reduced(P＜0.01,P＜0.05,P＜0.01,P＜0.05).Treatment with Shuyu Capsules and fluoxetine increased the CORT content and BDNF,ERK1/2,and CREB protein and mRNA levels in male offspring to varying degrees.Conclusions High levels of CORT in offspring act selectively on the hippocampus,exerting adverse effects on the emotional and learning memory functions of rats by downregulating the BDNF-ERK1/2 signaling cascade.The Chinese medicine Shuyu Capsules can reduce the impact of an adverse intrauterine environment on offspring development by correcting abnormal levels and pathways of glucocorticoids.

Objective To simulate modern social stress using a pre-pregnancy chronic mild stress(CMS)model and to explore the mechanisms of emotional,behavioral,and neurodevelopmental changes in male offspring of pre-pregnancy liver qi stagnation female mice through corticosterone(CORT)-brain-derived neurotrophic factor(BDNF)extracellular signal-regulated kinase(ERK)1/2 signaling cascade-mediated hippocampal injury.This study aimed to elucidate the impact of negative life events on offspring and the interventional mechanism of Shuyu Capsules.Methods CMS stress was used to induce pre-pregnancy depression in female rats(liver qi stagnation state),followed by intervention with Shuyu and fluoxetine capsules.After screening,male rats were mated and 12 male offspring from each group were selected for behavioral testing and detection of serum CORT levels by enzyme-linked immunosorbent assay.BDNF,ERK1/2,phospho(p)-ERK1/2,cAMP-response element binding protein(CREB),and p-CREB protein levels in the hippocampus were detected by Western Blot,and BDNF,ERK1,ERK2,and CREB mRNA levels in the hippocampus were detected by reverse transcription-polymerase chain reaction(RT-PCR),to verify the effects of pre-pregnancy CMS on the BDNF-ERK1/2-CREB signaling pathway and to investigate the key micro-mechanisms of Shuyu Capsules on emotional and learning memory-related behaviors of male offspring of females with pre-pregnancy liver qi stagnation syndrome.Results The distance,number of entries,and duration of stay in the central area in open-field experiments were significantly reduced in offspring in the model group(all P＜0.05).The escape latency during the exploration period of the water-maze experiment was significantly prolonged(P＜0.05)and the swimming distance,duration of the target quadrant,and number of platform crossings were significantly reduced(P＜0.05,P＜0.05,P＜0.01),the suspension time and frequency in the forced-swimming experiment were increased(P＜0.05,P＜0.01),and the incubation period was shortened(P＜0.05)in offspring in the model group.Prophylactic treatment with Shuyu Capsules and fluoxetine improved the depression-like behavior and cognitive impairment in the offspring in the model group.Biochemical tests showed that CORT levels were increased in the CMS model group(P＜0.05),BDNF,p-ERK1/2,and p-CREB protein levels in the hippocampus were decreased(all P＜0.05),and BDNF,ERK1,ERK2,and CREB mRNA levels were significantly reduced(P＜0.01,P＜0.05,P＜0.01,P＜0.05).Treatment with Shuyu Capsules and fluoxetine increased the CORT content and BDNF,ERK1/2,and CREB protein and mRNA levels in male offspring to varying degrees.Conclusions High levels of CORT in offspring act selectively on the hippocampus,exerting adverse effects on the emotional and learning memory functions of rats by downregulating the BDNF-ERK1/2 signaling cascade.The Chinese medicine Shuyu Capsules can reduce the impact of an adverse intrauterine environment on offspring development by correcting abnormal levels and pathways of glucocorticoids.

Objective To explore the key nursing cooperation points in single-port laparoscopic cholecystectomy based on magnetic anchor technique. Methods The general information of 24 patients with transumbilical single-port laparoscopic cholecystectomy based on magnetic anchor technique was analyzed. Combined with the surgical procedure, the key nursing cooperation points of this innovative surgery were analyzed from the perspective of operating room nurses. Results By learning the principles of magnetic anchor technique before surgery, understanding the usage and precautions of the magnetic anchor device, accurately passing the magnetic anchor device during surgery, and avoiding mutual interference between the magnetic anchor device and conventional surgical instruments, the operating room nurses successfully assisted the surgeons in completing 24 cases of transumbilical single-port laparoscopic cholecystectomy based on magnetic anchor technique. Conclusion Real-time understanding of the surgeon's operation progress during surgery, accurate delivery of instruments, and avoidance of interference between the magnetic anchor device and conventional surgical instruments are important factors in the nursing cooperation of this surgical procedure.

Objective To investigate the mechanism of Sanguisorbae Radix(SR)in the treatment of ulcerative colitis(UC).Methods Using the GSE92415 dataset from the Gene Expression Omnibus database,we analyzed differentially expressed genes and carried out weighted gene correlation network analysis and FerrDb analysis.Core genes were identified through protein-protein interaction(PPI)network and correlation analysis.UC mouse model induced by dextran sulfate sodium(DSS)was constructed and treated with SR via intragastric administration for 9 days.Disease activity index(DAI)and colon length were recorded.Pathological changes in colon tissue were observed using the HE staining.Levels of inflammatory cytokines such as tumor necrosis factor-α(TNF-α)and interleukin-6(IL-6)were detected by enzyme linked immunosorbent assay(ELISA).Lipid peroxidantion factors such as malondialdehyde(MDA)and glutathione(GSH)were detected using biochemical test kits.Protein expression levels of zonula occludens protein-1(ZO-1)tight junction protein,peroxisome proliferator-activated receptor gamma(PPARG),solute carrier family 7 member 11(SCL7A11),and glutathione peroxidase 4(GPX4)were examined by Western blot or immunofluorescence labeling.Results Nine differentially expressed genes associated with ferroptosis were screened and PPARG was identified as a key gene.Correlation analysis showed a strong correlation between PPARG and ferroptosis.Subsequently,the potential mechanism of SR in improving UC in mice was discussed according to the bioinformatics screening results.The experimental results demonstrated that SR significantly reduced the DAI,prevented colon shortening and improved intestinal mucosal barrier function in the colon.SR decreased TNF-α and IL-6 levels,MDA content and GSH levels in colon tissues.SR also enhanced the expression of PPARG,SLC7A11 and GPX4,which reversed the effect of DSS in mice with colitis.Conclusions Ferroptosis is closely related to UC.SR can inhibit ferroptosis by regulating PPARG and SCL7A11/GPX4 expression,thereby improving colon epithelial injury and dysfunction in UC mice.This provides ideas and directions for UC treatment strategies.

Objective To investigate the feasibility of the optimally designed"I"shaped structure mag-net based on the principle of magnetic compression technique for the preparation of rectovaginal fistula animal model.Methods Using 10 New Zealand female rabbits as the model animals,two self-designed magnets were inserted through the vagina and anus respectively after anesthesia,and the two magnets were adjusted to the appropriate position and made them attraction each other to form a magnet-rectovaginal partition-magnet structure.When the compression tissue between the magnets became ischemic necrosis and fell off,the two magnets formed the"1"shape structure and were located in the stoma of rectovaginal fistula to prevent the stoma from becoming smaller or even closing itself.The operation time and rectovaginal fistula formation time were recorded.The experimental rabbits were killed in postoperative 2 weeks,and the rectovaginal fistula specimens were obtained.The formation of fistula orifice was observed and the size of fistula orifice was meas-ured.Results The animal model of rectovaginal fistula was successfully prepared in all 10 experimental rab-bits.The procedure of intraoperative magnet placement was smooth and the operation time was(1.55±0.65)min.The experimental animals were generally in good condition after surgery,and the fistula orifice was formed on postoperative(4.80±0.75)d.After taking the gross specimen of rectovaginal septum in postopera-tive 2 weeks,the magnet was removed.The fistula orifice of rectovaginal fistula was visible with the diameter of(5.86±0.38)mm.Conclusion The"I"shaped structure magnet designed based on the principle of mag-netic compression technique could be used in the preparation of the rectovaginal fistula animal model.Its oper-ation is simple with high success rate of model preparation and good uniformity in fistula orifice.

ObjectiveTo investigate the change and potential role of Mindin protein in the treatment of chronic hepatitis B （CHB） with PEG-IFNα-2b. MethodsA total of 29 CHB patients who received the treatment with PEG-IFNα-2b in The Second Affiliated Hospital of Xi’an Jiaotong University from January 2018 to December 2019 were enrolled， and according to their clinical outcome， they were divided into cured group with 17 patients and uncured group with 12 patients. Peripheral blood samples were collected from both groups at baseline， 12 weeks， and 24 weeks to measure blood routine indices， liver function parameters， hepatitis B markers， and Mindin protein. HBsAg， alanine aminotransferase （ALT）， aspartate aminotransferase （AST）， and Mindin protein at different time points were compared between the two groups. The independent-samples t test was used for comparison of normally distributed continuous data between two groups， and the Mann-Whitney U test was used for comparison of non-normally distributed continuous data between two groups； a Spearman correlation analysis was used to investigate correlation； a multiple linear regression analysis was used to investigate the influence of HBsAg and ALT on the content of Mindin protein. ResultsThe analysis of baseline data showed that there were significant differences in the levels of HBsAg， HBeAb， albumin， and albumin/globulin ratio between the cured group and the uncured group （all P<0.05）. The cured group tended to have a gradual increase in the level of Mindin， and the level of Mindin at 24 weeks was significantly higher than that at baseline （P<0.05）. The cured group had a significantly higher level of Mindin protein than the uncured group at 24 weeks （P=0.019）. The cured group had a significantly lower level of HBsAg than the uncured group （P<0.05）， with a significant change from baseline to each time point within the cured group （P<0.05）. In addition， the levels of ALT and AST in the cured group tended to first increase and then decrease， and the expression levels at 12 weeks were significantly higher than those at baseline （P<0.05）. At 12 weeks， there was a strong linear correlation between Mindin protein levels and ALT in the untreated group （r=0.760 8， P<0.05）， and further multiple linear regression analysis also demonstrated a linear relationship between the two （b=1.571， P=0.019）. ConclusionThere is a significant difference in the level of Mindin protein between the cured group and the non-cured group after 24 weeks of PEG-IFNα-2b antiviral treatment， and therefore， detecting the dynamic changes of Mindin protein can better predict the treatment outcome of CHB， which provides a reference for clinical practice.

Objective:To investigate the predictive value of a radiomics model based on biparametric magnetic resonance imaging(bpMRI)for biochemical recurrence(BCR)after radical prostatectomy(RP)in elderly prostate cancer patients(≥60 years old).Methods:A retrospective analysis was conducted on data from 175 patients treated at Beijing Hospital from August 2017 to December 2021.Based on pathological results, image segmentation was performed on preoperative bpMRI T2, diffusion weighted imaging(DWI), and apparent diffusion coefficient(ADC)sequences.Pyradiomics was utilized to extract radiomic features, and Cox regression, Spearman correlation coefficient, and LASSO regression were employed for feature dimensionality reduction, leading to the construction of radiomic labels.Clinical models and image-clinical combined models were developed using multifactorial Cox regression analysis, and the performance of these models in predicting BCR was evaluated using the concordance index(C-index).Results:The 175 patients were randomly divided into a training set(122 cases)and a test set(53 cases)at a ratio of 7∶3, with 24 cases(19.7%, 24/122)and 11 cases(20.8%, 11/53)experiencing BCR, respectively.A total of 5 775 radiomic features were extracted from the three sequences, and after dimensionality reduction, 5 features were selected to construct the radiomic labels.The radiomics model exhibited C-index values of 0.764(95% CI: 0.655-0.872)and 0.769(95% CI: 0.632-0.906)in the training and test sets, respectively.Multifactorial Cox regression analysis revealed serum prostate-specific antigen(PSA)( HR=1.032, 95% CI: 1.010-1.054), postoperative pathology International Society of Urological Pathology(ISUP)grade grouping( HR=1.682, 95% CI: 1.039-2.722), and positive surgical margins( HR=2.513, 95% CI: 1.094-5.774)as independent predictors of BCR.The clinical model exhibited C-index values of 0.751(95% CI: 0.655-0.846)and 0.753(95% CI: 0.630-0.877)in the training and test sets, respectively.Following combined modeling of clinical factors and radiomic labels, the image-clinical combined model demonstrated the highest C-index values, namely 0.782(95% CI: 0.679-0.874)and 0.801(95% CI: 0.677-0.915)in the training and test sets, respectively. Conclusions:The radiomics model based on bpMRI can predict the occurrence of BCR after RP in elderly prostate cancer patients.Combined modeling of clinical factors and radiomic labels can enhance predictive efficiency.

SARS-CoV-2 may have potential effects on the male reproductive system. Evidence has shown that SARS-CoV-2 is not likely to transmit through sexual intercouse. However, male infected with SARS-CoV-2 may experience sexual dysfunction, semen quality decline, testicular damage and abnormal sex hormones. The extent and duration of these damages are still unclear, and further multidimensional research is necessary.