Objective: To analyze factors impacting mental health status of medical students based on ecological systems theory, so as to provide reference for the mental health promotion system for medical students. Methods: In June 2024, 1 760 medical school students randomly selected from 19 different kinds of medical colleges in eastern China by stratified cluster were surveyed using questionnaires and expert interviews. Descriptive statistics, cross analysis, hierarchical linear regression analysis, structural equation models were used for data analysis. Results: Medical school students had higher satisfaction with the school (65.85%) and a great sense of perceived social support (57.16%). Furthermore, 91.14% of the students had normal interpersonal relationships. However, 44.89% reported that their mental health was impacted by high level of depression. The hierarchical linear regression analysis showed that the mental health outcomes of the medical students were positively predicted by higher perceived social support scores ( β =-11.40), institutional satisfaction ( β =-4.85 ), and lower help seeking stigma scores ( β =9.31) ( P <0.05). The structural equation modeling showed that the status of both perceived social support and self help seeking stigma had significant impacts on depression severity ( β =-0.32, -0.53) and interpersonal relationship sensitivity ( β =-0.31, 0.58) among medical students ( P <0.01).Through expert interviews, collaborations between the school and the tripartite organization (families, universities and society) was of growing importance. Conclusions Perceived social support and self stigma have a significant impact on the mental health status of medical students. The problem of self stigma of medical students should be paid attention to. Therefore, families, universities and society should work together to improve the mental health of medical students.

[摘 要] 目的：基于公开的卵巢癌（OC）单细胞测序数据并利用生物信息学方法构建OC上皮细胞亚型，探究上皮细胞异质性及其对OC肿瘤微环境（TME）的影响。方法：使用GSE118828卵巢癌单细胞数据集的分析得到的8种细胞类型及基因表达矩阵结果，使用反卷积方法估计整体转录组测序（bulk RNA-seq）数据中的细胞组成，依据上皮细胞丰度将OC分为高上皮细胞亚型（C1型）和低上皮细胞亚型（C2型）。分析C1型与C2型患者的生存时间及免疫微环境差异。基于C1、C2型及OC早期（Ⅰ~Ⅱ期）、晚期（Ⅲ~Ⅳ期）组间的差异表达基因（DEG），筛选与OC进展相关的上皮细胞相关基因并分析其对TME的影响。通过人类蛋白质图谱（HPA）数据库数据验证OC进展中上皮细胞相关基因的蛋白表达水平。结果：C1型患者的OS明显优于C2型患者（P < 0.05）。C1、C2型具有完全不同的免疫微环境浸润特性，C1型中辅助性T（Th）细胞、M1型巨噬细胞和激活的树突状细胞浸润程度显著高于C2型（均P < 0.05）。晚期高上皮细胞OC患者HAS1、DAPL1、ADH1B基因表达增加（均P < 0.05），同时，DAPL1基因在OC中的表达与巨噬细胞、Treg细胞的浸润程度呈正相关（P < 0.05）。HPA数据库数据证实，DAPL1蛋白在OC组织中表达显著增加。结论：卵巢癌高上皮细胞亚型可能由于Th细胞、M1型巨噬细胞和激活的树突状细胞的高度浸润发挥抗肿瘤作用；上皮细胞相关基因DAPL1的高表达可能会诱导巨噬细胞、Treg细胞的浸润程度，从而促进OC的进展。

Objective To explore the symptom prevalence in the patients with pulmonary nodules in Lingnan area and to investigate the influencing factors,thus to provide data support for the construction of differentiation and treatment system of symptoms-syndrome elements-syndromes-constitutions for patients with pulmonary nodules,and to promote the establishment of secondary prevention system of lung cancer with the in-depth participation of traditional Chinese medicine(TCM).Methods A cross-sectional study was adopted to investigate patients with pulmonary nodules who admitted in the First Affiliated Hospital of Guangzhou University of Chinese Medicine from August 2023 to January 2024.Data collection covered the basic information,clinical characteristics and symptoms of the patients.Likert four-level scale was used for the grading of the severity of the symptoms,multivariate linear regression was adopted to construct three regression models,and then the factors influencing the severity of symptoms of patients with pulmonary nodules were explored.Results(1)A total of 274 patients were enrolled in the analysis,including 160 females and 114 males,with a mean age of(54.44±12.00)years old and the symptom scores averaging(3.97±3.80)point.The included patients with pulmonary nodules were characterized by females outnumbering males,a higher proportion of middle-aged and elderly people,multiple pulmonary nodules being more common.(2)The analysis of the symptoms of the 274 patients showed that symptoms with an incidence over 30%were fatigue(116 cases,42.34%),cough(105 cases,38.32%),expectoration of white sputum(89 cases,32.48%),and irritability and distress(87 cases,31.75%).(3)Multivariate linear regression analysis after variable adjustment suggested that the overall symptomatic severity in the male was milder than that in the female[β=-1.67,95%CI(-2.67,-0.68),P<0.001],and symptom score was positively correlated with age[β=0.07,95%CI(0.03,0.10),P<0.001],history of exposure to secondhand smoke[β=1.27,95%CI(0.26,2.27),P=0.015],history of exposure to other hazardous substances[β=1.96,95%CI(0.39,3.53),P=0.015],and history of allergy[β=2.38,95%CI(1.22,3.54),P<0.001]significantly.Conclusion The overall symptoms of patients with pulmonary nodules in Lingnan area are mild,and the high prevalence of symptoms are fatigue,cough,expectoration of white sputum,and irritability and distress.The symptom severity is correlated with gender,age,history of exposure to secondhand smoke,history of exposure to other hazardous substances,and history of allergy.

Objective To explore the application of Mini-CEX oriented by nurses'core competencies in the clinical teaching of intern nursing students.Methods A total of 50 students,interning in the First Affiliated Hospital of Kunming Medical University from January 1,2023 to April 30,2024,were randomly divided into experimental group and control group,with 25 students in each group.The control group was taught by traditional clinical teaching methods,and the experimental group by Mini-CEX.The data indicators of the two groups of intern nursing students were analyzed and compared at entry into and exit from the department,respectively.Results The scores of the two groups were higher than those at entry into the department(P<0.05),and the intern nursing students in the experimental group had excellent scores in nursing consultation,nursing examination,nursing diagnosis,nursing measures,humanistic care,organizational effectiveness,health consultation,and overall evaluation,and the scores were higher than those of the control group(P<0.05).The improvement in all the scores was also better than that of the control group(P<0.05).Conclusion Mini-CEX,which is oriented to the nurse'core competencies of nurses,can improve the clinical nursing abilities of intern nursing students and enhance the cultivation effect of clinical practice skills.

Based on the discussions in the The Inner Canon of Yellow Emperor （《黄帝内经》）， it is proposed that in the course of the disease， "bind" represents the initial stage of pulmonary nodules， while "accumulation" represents the final form. In terms of the pathogenesis， "two colds interacting" represented by "body cold" and "cold fluid retention" are the prerequisites for the formation of pulmonary nodules， while "disorder of qi" represented by "fainting" is the core of the formation. The specific manifestation is the disturbance of pivot of shaoyang （少阳） or shaoyin （少阴）， resulting in a complex of cold and heat， and then phlegm and stasis are suddenly generated and further formed into nodules. Therefore， the treatment principle should be to regulate the cardinal mechanism， dissolve phlegm and blood stasis. Depending on the complex degree of cold and heat， it is suggested to use Chaihu Guizhi Decoction （柴胡桂枝汤）， Chaihu Guizhi Ganjiang Decoction （柴胡桂枝干姜汤）， or Chaihu Xianxiong Decoction （柴胡陷胸汤） for disturbance of shaoyang pivot， while for shaoyin pivot dysfunction， modified Mahuang Fuzi Xixin Decoction （麻黄附子细辛汤） or Shengjiang Powder （升降散） can be used.

ObjectiveTo investigate the tumor inhibition effect and mechanism of Yifei Sanjie Pills （益肺散结丸， YSP） on lung cancer. MethodsLewis lung cancer tumor-derived mice were established and divided into four groups including model control group， cisplatin group， cisplatin + YSP low-dose group and cisplatin + YSP high-dose group， with 12 mice in each group. The corresponding interventions were given for 14 days. The tumor volume was measured on the 0th， 3rd， 7th， 10th and 14th days of administration to evaluate the tumor growth. The plasma and tumor tissue were collected on the 15th day. Plasma from the model group， the cisplatin group and the cisplatin+YSP high-dose group were selected， and plasma exosomes were extracted； the differences in miRNA expression among the groups were detected and analyzed by second-generation sequencing technology， and the potential mechanism of action of YSP was investigated by principal component analysis， biofunctional enrichment analysis and miRNA-target gene regulatory network analysis. Quantitative real-time PCR was used to detect the expression of miRNA-615-3p in tumor tissues， and the relationship between miRNA-615-3p and overall survival of lung cancer were analyzed using the Kaplan-Meier plotter （kmplot.com） database. ResultsCompared to that of the model control group， the tumor volume of the cisplatin group on day 10， and the cisplatin + YSP low- and high-dose groups on day 7， 10， and 14 were significantly reduced （P＜0.05 or P＜0.01）. Compared to that of the cisplatin group， the tumor volume of the cisplatin + YSP low- and high-dose groups on day 10 and 14 was significantly reduced （P＜0.05）. The principal component analysis of miRNA expression profiles showed significant differences in miRNA expression between different intervention groups. There were 21 differentially expressed miRNAs between the model control group and the cisplatin group， 50 differentially expressed miRNAs between the model control group and the cisplatin+ YSP high-dose group， and 6 differentially expressed miRNAs between the cisplatin group and the cisplatin+ YSP high-dose group. Biological function enrichment analysis showed that the differentially expressed miRNAs were mainly involved in the regulation of signaling pathways related to cell growth， proliferation， differentiation， autophagy and other biological activities. The miRNA-target gene regulatory network showed the top 20 genes that were targeted， among which there were proven miRNAs and genes related to lung cancer， and miRNAs that needed further investigation. The expression of miRNA-615-3p in tumor tissues decreased significantly in the cisplatin group and cisplatin+YSP high-dose group compared to that of the model group（P＜0.05 or P＜0.01）. The miRNA-615-3p was negatively correlated with the survival prognosis of lung cancer（P＜0.05）. ConclusionCisplatin combined with YSP can effectively inhibit the proliferation of Lewis lung cancer tumors， and the tumor-suppressive effect is related to the regulation of multiple miRNAs， especially the downregulation of miRNA-615-3p expression.

Patients with gastric cancer are at high risk for venous thromboembolism(VTE)and bleeding,and patients who develop VTE are often associated with poor outcomes,making it clinically challenging to identify and manage the risk of thrombosis in patients with gastric cancer.Risk factors for VTE in gastric cancer patients include age,obesity,surgery,chemotherapy,etc.It is essential to identify high-risk patients and adopt aggressive prevention strategies.The main strategy to prevent and treat VTE is the use of anticoagulant drugs.This article discusses guidelines and recent studies for the prevention and treatment of VTE in patients with gastric cancer to help clinicians make individualized decisions for their patients and maximize clinical outcomes for their patients.

Patients with primary membranous nephropathy(PMN)tend to develop thrombosis,especially in the early phase of the disease.The pathogenesis of thrombosis is multifactorial,with hypoalbuminemia being widely regarded as an inde-pendent risk factor.Other factors include proteinuria,M-type phospholipase A2 receptor antibody,and D-dimer.Although prophy-lactic anticoagulation therapy is frequently used in clinical practice to prevent thrombosis in PMN patients,there are still many un-resolved issues regarding the optimal prevention of thrombosis in this condition.The timing of prophylactic anticoagulation,the threshold of serum albumin level,and the choice of treatment regimen are still lacking consensus.This article reviewed the relevant literature on these topics,aiming to establish a standard for thrombosis prevention and treatment for this population in the future and provide guidance for clinical practice.

ObjectiveTo investigate the effect of Shugan Quyu Jiedu prescription （SGQYJDF） on inducing ferroptosis in hepatocellular carcinoma cells based on the tumor protein 53 （p53）/solute carrier family 7 member 11 （SLC7A11）/glutathione peroxidase 4 （GPX4） pathway. MethodMHCC97H cells were divided into the blank serum group （10% blank serum medium）， SGQYJDF-containing serum low concentration group （5% SGQYJDF-containing serum and 5% blank serum medium）， SGQYJDF-containing serum medium concentration group （7.5% SGQYJDF-containing serum and 2.5% blank serum medium）， SGQYJDF-containing serum high concentration group （10% SGQYJDF-containing serum medium） and sorafenib group （sorafenib concentration of 10 μmol·L^-1 in 10% blank serum medium）. After 24 hours of intervention， the cell survival rate was detected by cell counting kit-8 （CCK-8） assay. The cell proliferation ability was detected by 5-ethynyl-2′-deoxyuridine （EdU） staining. The intracellular ferrous ion （Fe²⁺） level was detected by ferrous ion fluorescent probe （FerroOrange） staining. The intracellular malondialdehyde （MDA） and glutathione （GSH） levels were detected by colorimetric assays. The ultrastructure of mitochondria was observed by transmission electron microscopy. The expression levels of ferroptosis-related proteins p53， SLC7A11 and GPX4 were detected by Western blot. ResultIn terms of cell viability， compared with the blank serum group， the SGQYJDF group showed a dose-dependent decrease in the survival rate of MHCC97H cells. Effect of the medium and high concentrations of SGQYJDF on the survival rate of MHCC97H cells were significantly decreased （P<0.01）. Additionally， the results of the EdU assay showed that both the medium and high concentrations of SGQYJDF were able to inhibit the proliferation ability of MHCC97H cells （P<0.05， P<0.01）. Regarding the biochemical indicators of ferroptosis， compared to the blank serum group， the medium and high concentrations of SGQYJDF were able to dose-dependently increase the intracellular Fe²⁺ level （P<0.01）. The low， medium， and high concentrations of SGQYJDF were able to dose-dependently decrease the level of GSH in MHCC97H cells （P<0.01） and increase the level of MDA in the cells （P<0.05， P<0.01）. In terms of pathway-related protein expression， compared to the blank serum group， the medium and high concentrations of SGQYJDF could significantly increase the expression of p53 （P<0.01）. The low， medium， and high concentrations of SGQYJDF could significantly decrease the expression of GPX4 （P<0.01）. The high concentration of SGQYJDF could decrease the expression of SLC7A11 （P<0.01）. In terms of the cell morphology of ferroptosis， compared with the blank serum group， transmission electron microscopy revealed that the low concentration of SGQYJDF caused mitochondrial deformation， while the medium and high concentrations of SGQYJDF resulted in reduced mitochondrial volume， increased double-layer membrane density， and decreased mitochondrial cristae. These features were similar to those of sorafenib-induced ferroptosis. Furthermore， compared with the sorafenib group， the high concentration of SGQYJDF showed no statistically significant differences in cell survival rate， proliferation ability， Fe²⁺ level， MDA level， and GSH level. ConclusionThe results suggest that SGQYJDF may induce ferroptosis and inhibit proliferation in hepatocellular carcinoma MHCC97H cells by upregulating the expression of p53， suppressing the expressions of GPX4 and SLC7A11， downregulating the level of GSH， and leading to the accumulation of intracellular Fe²⁺ and MDA.

Objective:To explore the mediating role of mentoring function between proactive personality and transition shock in new nurses, with the aim of providing reference and basis for managers to develop effective intervention measures for new nurses during their transformational period.Methods:Convenience sampling method was used to select 280 new nurses from the Second Affiliated Hospital of Zhejiang University School of Medicine, and a cross-sectional survey was conducted by applying the General Information Questionnaire, Transition Shock Scale, Proactive Personality Scale, and Mentoring Function Scale. The mediating role of mentoring function between new nurses′ proactive personality and transition shock was evaluated by constructing structural equation modelling.Results:265 valid questionnaires were ultimately collected. Among 265 nurses, there were 25 males and 240 females, with an age of (22.88 ± 2.12) years. The score of transition shock, proactive personality, and mentoring function of new nurses were (83.45 ± 18.95), (58.66 ± 9.96) and (81.72 ± 14.46) respectively; transition shock was negatively correlated with proactive personality and mentoring function ( r=-0.379, -0.340, both P<0.01), and proactive personality was positively correlated with mentoring function ( r=0.452, P<0.01); the mediating effect of mentoring function between proactive personality and transition shock was significant (95% CI -0.085 - -0.015, P<0.01), accounting for 29.14% of the total effect. Conclusions:New nurses' transition shock is at a moderately high level, and proactive personality can affect transition shock directly or indirectly through mentoring function. Managers can mitigate new nurses′ transition shock by improving the quality of mentoring.