ObjectiveTo investigate the epigenetic mechanism of Diwu Yanggan Capsule in improving liver regeneration microenvironment in a rat model of liver cancer by regulating DNA methylation， and to provide a basis for scientific clinical medication. MethodsA total of 48 specific pathogen-free Sprague-Dawley rats were divided into normal group， model group， and Diwu Yanggan Capsule group using a random number table， with 16 rats in each group. The Solt-Farber two-step method was used to establish a rat model of liver cancer. The rats in the Diwu Yanggan Capsule group were given Diwu Yanggan Capsule at a dose of 750 mg/kg/d by gavage， and those in the normal group and the model group were given an equal volume of normal saline by gavage. Liver tissue samples were collected from each group of rats after 16 weeks of continuous intervention； DNA methylation chips were used to analyze the change in DNA methylation in liver tissue， and gene ontology （GO） and Kyoto Encyclopedia of Genes and Genomes （KEGG） analyses were used for data analysis. In addition， the MeDIP-PCR technique was used to detect the changes in candidate differentially methylated genes such as YWHAB， ADCK2， ERLIN2， SEMA3B， and TPH2 in the liver tissue of rats， and Western blot and RT-qPCR were used to verify the expression of key methylated genes. The independent-samples t test was used for comparison of continuous data between two groups， and a one-way analysis of variance was used for comparison between multiple groups， while the least significant difference t-test was used for further comparison between two groups. ResultsThe DNA methylation chip analysis showed that compared with the normal group， the model group had significant methylation changes in the promoter region of 2 422 genes in liver tissue of rats. The GO functional enrichment analysis and the KEGG pathway enrichment analysis showed that these differentially methylated genes were significantly enriched in metabolic pathways such as steroid hormone biosynthesis and drug metabolism-cytochrome P450. Compared with the model group， the Diwu Yanggan Capsule group had significant reversal of promoter methylation in 1 650 genes， and the KEGG enrichment analysis showed that these genes were mainly involved in the pathways closely associated with cell proliferation， apoptosis， and microenvironment regulation， such as the calcium ion signaling pathway， the cAMP signaling pathway， and the extracellular factor signaling pathway. Compared with the model group， the Diwu Yanggan Capsule group had a significant increase in the promoter methylation level of the ADCK2 gene （P<0.05） and significant reductions in the promoter methylation levels of the ERLIN2 and TPH2 genes （all P<0.05）. Compared with the model group， the Diwu Yanggan Capsule group had significant reductions in the mRNA expression levels and the protein expression levels of the ADCK2 （all P<0.05）. ConclusionAbnormal DNA methylation in liver tissue participates in the development and progression of liver cancer. The effect of Diwu Yanggan Capsule on DNA methylation level is an important epigenetic mechanism for its effect in the prevention and treatment of liver cancer.

Risk prediction models for postoperative pulmonary complications (PPCs) can assist healthcare professionals in assessing the likelihood of PPCs occurring after surgery, thereby supporting rapid decision-making. This study evaluated the merits, limitations, and challenges of these models, focusing on model types, construction methods, performance, and clinical applications. The findings indicate that current risk prediction models for PPCs following lung cancer surgery demonstrate a certain level of predictive effectiveness. However, there are notable deficiencies in study design, clinical implementation, and reporting transparency. Future research should prioritize large-scale, prospective, multi-center studies that utilize multiomics approaches to ensure robust data for accurate predictions, ultimately facilitating clinical translation, adoption, and promotion.

Under the new educational development trends,numerous universities are actively exploring the deep integration of digital information technology and artificial intelligence(AI)technology with teaching.Through a three-phase process involving stu-dents'pre-class AI-assisted online self-learning via knowledge graphs,interactive classroom teaching between teachers and students,and post-class collaborative enhancement,we explored intelligent visualization-assisted teaching,personalized learning,and multi-di-mensional,fine-grained formative assessment to help teachers offer differentiated attention and personalized guidance,encourage stu-dents'autonomous and personalized learning,enhance students'self-study capabilities.This teaching practice has achieved remark-able results in stimulating students'learning enthusiasm,broadening their knowledge base,and enhancing their self-directed learning capabilities.

Objective:To analyze the influencing factors of low fall alertness in elderly inpatients,construct a risk prediction model and validate it,providing a reference for clinical medical staff to identify elderly inpatients with low fall alertness in the early stage.Methods:A total of 605 elderly inpatients treated in Yijishan Hospital affiliated to Wannan Medical College from Oct 2023 to Mar 2024 were enrolled and randomly divided into the training group(n=423)and validation group(n=182)at a ratio of 7∶3.The patients were evaluated using a general information questionnaire,the Social Frailty Screening Tool(HALFT),the Tilburg Frailty Indicator(TFI),and the Self-Awareness of Falls in Elderly scale(SAFE).Multivariate logistic analysis was used to determine the influencing factors of low fall alertness in elderly inpatients.RStudio was used to construct a risk prediction model of low fall alertness.The discrimination,calibration,and clinical net benefit of the model were verified using the receiver operating characteristic(ROC)curves,calibration plots,and decision curve analysis(DCA).Results:Multivariate logistic analysis showed that the history of falls,monthly income,previous physical activity time,social frailty score and TFI score were independent risk factors for low fall alertness in elderly inpatients.The Hosmer-Lemeshow χ2 test showed that χ2=8.863,P=0.354,indicating good calibration of the prediction model.The area under the ROC curve of the training group and the validation group were 0.860(95%CI:0.815-0.904)and 0.937(95%CI:0.888-0.986),respectively,and the maximum Youden indices of the model was 0.576 and 0.788,respectively,indicating good discrimination of the model.The DCA decision curve showed that the model had good clinical effectiveness.Conclusion:The constructed model has a good prediction effect and can help clinical medical staff quickly and effectively screen out elderly inpatients at risk of low fall alertness.

Under the background of increasingly severe drug-resistant bacteria infections,protracted course of chronic wounds has become clinical difficulties disturbing both patients and doctors.With the unique advantages of broad antibacterial spectrum,low drug resistance rate and high safety,polyhexanide antibacterial agent has gradu-ally become a major approach for treatment and nursing of chronic wounds.The application of polyhexamethylene biguanide(PHMB)antimicrobial agents in treatment and nursing of chronic wounds was reviewed in the article,including the antibacterial properties,comparisons with other antimicrobial agents,actual clinical practice and potential side effects,aiming to guide the further application of PHMB antimicrobial agents in treatment of chronic wounds.

Objective To investigate the effects of Bushen Shengjing Tiaohe Qixue Prescription on rats with diminished ovarian reserve(DOR)based on Wnt/β-catenin signaling pathway.Methods Totally 60 8-week-old SD female rats were randomly divided into control group,model group,estradiol valerate group and TCM low-,medium-and high-dosage groups,with 10 rats in each group.Except for the control group,the rats in the other groups were given a single intraperitoneal injection of cyclophosphamide 75 mg/kg to replicate the DOR rat model.From the next day of modeling,the corresponding drugs was administered for medication groups by gavage for 3 weeks.The general conditions of the rats were observed,ELISA was used to detect the contents of serum follicle-stimulating hormone(FSH),luteinizing hormone(LH),estradiol(E2),anti-mullerian hormone(AMH)and inhibin B(INHB),HE staining was used to observe the morphologic changes in ovarian tissue,Western blot was used to detect GSK3β,β-catenin,CyclinD1 and c-MYC protein expressions in ovarian tissues,immunohistochemical staining was used to observe β-catenin expression in ovarian tissue,RT-qPCR was used to detect Wnt1,Wnt2,Wnt4,GSK3β,β-catenin,CyclinD1 and c-MYC mRNA expression in ovarian tissue,transmission electron microscopy was used to observe ultrapathologic structure of ovarian granulosa cells.Results Compared with the control group,the rats in the model group had reduced intake of food and water,slow or even reduced body mass gain,and disturbed estrous cycle,the serum contents of FSH and LH increased(P<0.01),the contents of E2,AMH and INHB decreased(P<0.01);the number of follicles of all levels in ovarian tissue was reduced,and there was increased number of atretic follicles with disturbed arrangement of the granulosa cells;the expression of GSK3β protein in ovarian tissue increased(P<0.01),the expression of β-catenin,CyclinD1 and c-MYC protein decreased(P<0.05,P<0.01),and β-catenin positive expression decreased(P<0.01),the expression of Wnt1,Wnt2,Wnt4,β-catenin,CyclinD1 and c-MYC mRNA in ovarian tissue decreased(P<0.01),GSK3β mRNA expression was increased(P<0,01);organelles such as mitochondria and nuclei of ovarian granulosa cells were highly swollen and partially lysed.Compared with the model group,the rats in the administered group all had different degrees of body mass increase,partial restoration of the motility cycle,serum FSH and LH contents decreased,and serum E2,AMH and INHB contents increased(P<0.01,P<0.05);the number of follicles at all levels in ovarian tissue increased to varying degrees,and the atretic follicles were reduced;the expression of GSK3β protein in ovarian tissue decreased,β-catenin,CyclinD1 and c-MYC protein expressions increased,β-catenin positive expression increased,the expression of Wnt1,Wnt2,Wnt4,β-catenin,CyclinD1 and c-MYC mRNA in ovarian tissue increased,and GSK3β mRNA expression decreased,with statistical significance in estradiol valerate group and TCM high-dosage group(P<0.05,P<0.01);mitochondria,endoplasmic reticulum and other organelles of ovarian granulosa cells were mildly to moderately swollen.Conclusion Bushen Shengjing Tiaohe Qixue Prescription can improve ovarian function and regulate serum sex hormone levels in DOR model rats,and its mechanism might be related to the activation of Wnt/β-catenin signaling pathway.

Objective To explore the potential categories of frailty development trajectories in patients undergoing cardiac surgery from pre-operation to 6 months post-operation,and analyze the influencing factors.Methods By a longitudinal study design,patients undergoing elective heart valve replacement surgery or coronary artery bypass grafting in a tertiary general hospital in Zunyi City from August 2022 to June 2023 were selected by the convenience sampling method.Tilburg frailty scale was used to investigate the frailty level of cardiac surgery patients 1 day before surgery(T0),1 month(T1),3 months(T2)and 6 months after surgery(T3).The growth mixture model was used to identify the trajectory categories,and the influencing factors of different frailty trajectories were analyzed by binary Logistic regression.Results 261 patients were enrolled at T0,with 22,9,and 3 patients lost at T1 to T3,and 227 patients were finally included in the analysis.There were 2 types of trajectories being identified as the low frailty decline group and the high frailty maintenance group.Age,use of sedative and analgesic drugs,pace,and depression were the factors influencing the frailty in cardiac surgery patients(P＜0.05).Conclusion There are 2 kinds of frailty development trajectories in patients undergoing cardiac surgery.Medical staff should fonnulate precise interventions and nursing measures according to the factors influencing frailty,so as to improve frailty degree and quality of life of patients undergoing cardiac surgery.

During the Yan’an period， the party and government employed forms of health propaganda that were popular among the masses， focusing on superb medical skills and public feedback， as well as the strategy of skillfully using narrative techniques to carry out doctor-patient communication， which collectively created the image of good doctors characterized by “firm belief， superb medical skills， effective communication， and a friendly and approachable demeanor.” They were not only guardians of the people’s health but also the solid pillars of the success of the revolutionary cause. In the journey of the new era， contemporary medical professionals should deeply grasp the spiritual core of good doctors in the Yan’an period， uphold the leadership of the Communist Party of China， harbor a benevolent heart， and earn the trust and respect of patients through sincere humanistic care and superb medical services， so as to collectively promote the development of medical undertakings and contribute their strength to building a healthy China.

Objective To investigate the value of geometric parameters of vertebrobasilar artery(VBA)for judging whether vertebral artery(VA)provide cross blood supply of posterior cerebral artery(PCA)blood supply area.Methods MR T2-fluid attenuated inversion recovery(FLAIR),3D time of flight(TOF)MR angiography(MRA)and territorial arterial spin labeling(t-ASL)images of 244 healthy adults were prospectively acquired.The angles between left VA(LVA)or right VA(RVA)and basilar artery(BA)were measured,and the sum and difference between the two angles were calculated(referred to as the sum of VA angles and the difference of VA angles),and the differences of diameters of LVA and RVA were measured and calculated(referred to as the difference of VA diameters).VA perfusion distribution type in PCA blood supply area were observed,and those with type Ⅲ or Ⅵ were enrolled in cross group,while those with type Ⅱ or Ⅴ were enrolled in non-cross group,respectively.The geometric parameters of VBA were compared between groups.Receiver operating characteristic(ROC)curve of parameters being significant different between groups were drawn,and the efficacy of these parameters for judging whether VA provide cross blood supply of PCA area were evaluated.Results There were 34 subjects in cross group and 75 in non-cross group.The sum of VA angles and the difference of VA angles in cross group were both larger than those in non-cross group(both P＜0.05),while the difference of VA diameters were not significantly different between groups(P＞0.05).The AUC of the difference of VA angles for judging whether VA provide cross blood supply of PCA area was 0.676(P＜0.05),while of the sum of VA angles was 0.598(P=0.103).Conclusion The angle differences of LVA and RVA with BA had certain application value for judging whether VA provide cross blood supply of PCA area.

Under the new educational development trends,numerous universities are actively exploring the deep integration of digital information technology and artificial intelligence(AI)technology with teaching.Through a three-phase process involving stu-dents'pre-class AI-assisted online self-learning via knowledge graphs,interactive classroom teaching between teachers and students,and post-class collaborative enhancement,we explored intelligent visualization-assisted teaching,personalized learning,and multi-di-mensional,fine-grained formative assessment to help teachers offer differentiated attention and personalized guidance,encourage stu-dents'autonomous and personalized learning,enhance students'self-study capabilities.This teaching practice has achieved remark-able results in stimulating students'learning enthusiasm,broadening their knowledge base,and enhancing their self-directed learning capabilities.