Objective: To examine the characteristics of physical activity among secondary vocational school students and its associations with depressive symptoms, anxiety symptoms, and their co-existence, so as to provide evidence for promoting their mental health. Methods: From September to December 2024, a questionnaire survey was conducted on 5 141 secondary vocational school students using convenience sampling method across 16 secondary vocational schools in 8 provinces/municipalities, including Fujian, Chongqing, Guangdong, Guangxi, Hubei, Jiangxi, Shanghai and Zhejiang. A self designed questionnaire, International Physical Activity Questionnaire Short Form, Patient Health Questionnaire-9 and Generalized Anxiety Disorder Scale-7 were used to assess basic information, physical activity characteristics, and depressive and anxiety symptoms. Chi-square test and Logistic regression model were used to analyze the associations of physical activity characteristics with depressive symptoms, anxiety symptoms, and their co-existence. Results: Among secondary vocational school students, 22.2% had depressive symptoms, 12.2% had anxiety symptoms, and 10.5% had both conditions. After adjustment for confounding factors such as sex, grade, and family structure, Logistic regression analyses showed that a high physical activity level, meeting the recommendation for daily moderate to vigorous physical activity (MVPA), and a concentrated physical activity pattern were associated with lower odds of depressive symptoms, anxiety symptoms, and their co-existence ( OR =0.70-0.81, all P <0.05). Regular weekly MVPA and a regular physical activity pattern were associated only with lower odds of depressive symptoms ( OR =0.79, 0.70, both P <0.05). Sex stratified analyses showed that meeting the recommendation for daily MVPA and a concentrated physical activity pattern were associated with lower odds of depressive symptoms, anxiety symptoms, and their co-existence among boys ( OR =0.60-0.71); a high physical activity level, regular weekly MVPA, and a regular physical activity pattern were associated with lower odds of depressive symptoms among boys ( OR =0.65-0.78)(all P <0.05). Meanwhile, a high physical activity level, meeting the recommendation for daily MVPA, regular weekly MVPA, and regular and concentrated physical activity patterns were associated with lower odds of depressive symptoms in female students ( OR =0.72-0.79) (all P <0.05). Conclusions Physical activity characteristics are associated with depressive symptoms, anxiety symptoms, and their co-existence among secondary vocational school students. Schools should optimize physical activity promotion strategies according to sex specific characteristics to reduce the occurrence of depressive and anxiety symptoms among secondary vocational school students.

ObjectiveTo construct a risk prediction model for carotid artery plaques in high-risk populations of stroke based on five machine learning methods. MethodsThe clinical information of the high-risk population of stroke was collected. Factor analysis and statistical analysis of syndrome elements were conducted on their traditional Chinese medicine （TCM） symptoms and tongue and pulse manifestations. On the basis of the results of factor analysis and variable screening， five machine learning methods-classification and regression tree （CART） decision tree， support vector machine （SVM）， back propagation（BP） neural network， logistic regression， and random forest-were used to construct the risk prediction model for carotid artery plaques. ResultsThe most common TCM syndrome elements in the high-risk population of stroke was Qi deficiency. The scores of Qi deficiency， Yin deficiency， and Yang deficiency in the population with carotid artery plaques were higher than those without carotid artery plaques （P<0.05）. The CART decision tree， SVM， logistic regression， BP neural network， and random forest models showed the areas under the receiver operating characteristic （ROC） curves of 0.71， 0.75， 0.76， 0.76， and 0.75， the accuracy rates of 68.94%， 69.27%， 69.44%， 70.10%， and 69.60%， the precision rates of 68.56%， 68.53%， 68.75%， 69.74%， and 69.42%， the recall rates of 68.91%， 67.93%， 67.92%， 68.10%， and 67.31%， and the F₁ values of 0.69， 0.68， 0.68， 0.68， and 0.68， respectively. ConclusionAmong the high-risk population of stroke， the most frequently distributed TCM syndrome element is Qi deficiency， with the rest mainly being fire heat， Yin deficiency， Yang deficiency， phlegm dampness， blood stasis， and Qi stagnation. Deficiency syndrome may be a major factor leading to carotid artery plaques in the high-risk population of stroke. The BP neural network model demonstrates better performance in predicting the risk of carotid artery plaques in the high-risk population of stroke. People with carotid artery plaques are more likely to present with symptoms such as a heavy head， dizziness， headache， and thready pulse. The primary community benefits more widely when the BP neural network model is adopted to predict the risk of carotid artery plaques in the high-risk population of stroke over 40 years old.

ObjectiveTo construct a risk prediction model for carotid artery plaques in high-risk populations of stroke based on five machine learning methods. MethodsThe clinical information of the high-risk population of stroke was collected. Factor analysis and statistical analysis of syndrome elements were conducted on their traditional Chinese medicine （TCM） symptoms and tongue and pulse manifestations. On the basis of the results of factor analysis and variable screening， five machine learning methods-classification and regression tree （CART） decision tree， support vector machine （SVM）， back propagation（BP） neural network， logistic regression， and random forest-were used to construct the risk prediction model for carotid artery plaques. ResultsThe most common TCM syndrome elements in the high-risk population of stroke was Qi deficiency. The scores of Qi deficiency， Yin deficiency， and Yang deficiency in the population with carotid artery plaques were higher than those without carotid artery plaques （P<0.05）. The CART decision tree， SVM， logistic regression， BP neural network， and random forest models showed the areas under the receiver operating characteristic （ROC） curves of 0.71， 0.75， 0.76， 0.76， and 0.75， the accuracy rates of 68.94%， 69.27%， 69.44%， 70.10%， and 69.60%， the precision rates of 68.56%， 68.53%， 68.75%， 69.74%， and 69.42%， the recall rates of 68.91%， 67.93%， 67.92%， 68.10%， and 67.31%， and the F₁ values of 0.69， 0.68， 0.68， 0.68， and 0.68， respectively. ConclusionAmong the high-risk population of stroke， the most frequently distributed TCM syndrome element is Qi deficiency， with the rest mainly being fire heat， Yin deficiency， Yang deficiency， phlegm dampness， blood stasis， and Qi stagnation. Deficiency syndrome may be a major factor leading to carotid artery plaques in the high-risk population of stroke. The BP neural network model demonstrates better performance in predicting the risk of carotid artery plaques in the high-risk population of stroke. People with carotid artery plaques are more likely to present with symptoms such as a heavy head， dizziness， headache， and thready pulse. The primary community benefits more widely when the BP neural network model is adopted to predict the risk of carotid artery plaques in the high-risk population of stroke over 40 years old.

Objective To investigate the prevalence and burden of retinoblastoma(RB)in China based on the Glob-al Burden of Disease Study 2021(GBD 2021),thus providing a theoretical foundation for the diagnosis and treatment of RB.Methods Relevant indicators such as the standardized incidence rate,standardized prevalence rate,standardized mortality rate,and standardized disability-adjusted life year(DALY)rate of RB in the total population,males,and females in China from 1990 to 2021 were analyzed to assess the prevalence and disease burden of this disease.The Joinpoint model was employed to analyze the annual percent change(APC)and the average annual percent change(AAPC)of the overall standardized incidence rate,overall standardized prevalence rate,overall standardized mortality rate,and overall standard-ized DALY rate of RB in China from 1990 to 2021.In addition,the changes in the overall standardized incidence rate,over-all standardized prevalence rate,overall standardized mortality rate,and overall standardized DALY rate were compared be-tween China and the globe from 1990 to 2021.Results Compared with 1990,the standardized incidence rate of RB in the total population,males,and females in China increased by 1.840 times,2.154 times,and 1.689 times,respectively,in 2021;the standardized prevalence rate of RB in the total population,males,and females in China increased by 1.876 times,2.133 times,and 1.701 times,respectively;the standardized mortality rate of RB in the total population,males,and fe-males in China decreased by 0.679 times,0.636 times,and 0.714 times,respectively;the standardized DALY rate of RB in the total population,males,and females in China decreased by 0.652 times,0.616 times,and 0.676 times,respectively.Joinpoint analysis showed that compared with 1990,the APPC of the overall standardized incidence rate and the overall standardized prevalence rate in China in 2021 increased by 3.21 and 3.23,respectively;the AAPC of the overall standard-ized mortality rate and the overall standardized DALY rate decreased by 3.61 and 3.46,respectively.Compared with 1990,the global overall standardized incidence rate and overall standardized prevalence rate increased by 0.237 times and 0.242 times,respectively.The global overall standardized mortality rate and overall standardized DALY rate decreased by 0.212 times and 0.195 times,respectively.Conclusion Compared with 1990,the standardized incidence rate and standardized prevalence rate of RB in the total population,males,and females in China increased in 2021,while the standardized mortal-ity rate and DALY rate decreased in 2021,indicating an increase in the prevalence of the disease but a decrease in the dis-ease burden.From 1990 to 2021,the difference between the overall standardized incidence rate and overall standardized prevalence rate in China and the global level first increased and then decreased;however,the overall standardized mortality rate and overall standardized DALY rate in China were always lower than the global level.

Objective:To investigate the role and mechanism of leucine-rich α-2-glycoprotein 1 (LRG1) in the fibrosis of human pterygium fibroblasts (HPFs).Methods:A total of 30 nasal primary pterygium tissues from patients who underwent pterygium excision surgery and 30 nasal normal conjunctival tissues from patients who underwent strabismus correction surgery were collected from the First Affiliated Hospital of Harbin Medical University between January 2022 and March 2023, serving as the pterygium group and normal control group, respectively.LRG1 protein expression in both groups was detected by immunofluorescence staining.The mRNA and protein levels of LRG1 and transforming growth factor-β1 (TGF-β1) were evaluated by quantitative real-time PCR (qRT-PCR) and Western blot.Primary HPFs were cultured from excised pterygium tissues using tissue block adhesion method, and cell morphology was observed.Vmentin and cytokeratin were identified by immunofluorescence staining.HPFs were divided into recombinant human LRG1 (rhLRG1) group and blank control group treated with or without 10 μg/ml rhLRG1 for 24 hours, respectively, and cell migration was evaluated via scratch assay.Additionally, HPFs were divided into blank control group, LRG1 overexpression group and LRG1 knockdown group.HPFs in LRG1 overexpression group and LRG1 knockdown group were transfected with LRG1 overexpression plasmids and small interfering RNA for 24 hours, respectively.TGF-β1 mRNA level was evaluated by qRT-PCR and expression of TGF-β1, fibronectin (FN), type Ⅲ collagen (COL3), and α-smooth muscle actin (α-SMA) proteins were evaluated by Western blot.This study adhered to the Declaration of Helsinki.The study protocol was approved by the Ethics Committee of the First Affiliated Hospital of Harbin Medical University (No.2022IIT026).Written informed consent was obtained from each subject.Results:HPFs were successfully isolated, exhibiting spindle-shaped morphology with whorled arrangement, positive identification for vimentin, and negative immunofluorescence staining for cytokeratin.The migration rate of the rhLRG1 group was (83.01±2.56)%, significantly higher than (50.32±4.97)% of the blank control group ( t=9.59, P<0.001).Immunofluorescence staining results showed that compared with normal conjunctival tissue, LRG1 protein was significantly higher expressed in pterygium tissue and was widely distributed in fibrous connective tissue and epithelial layer.Both mRNA and protein levels of LRG1 and TGF-β1 were significantly higher in the pterygium group than in the normal control group (mRNA: t=10.18, 6.15, both P<0.05.protein: t=6.83, 8.79, both P<0.05).In the LRG1 overexpression group, mRNA level of TGF-β1, and protein levels of FN, COL3 and α-SMA were significantly increased compared with the blank control and LRG1 knockdown groups (all P<0.05). Conclusions:LRG1 promotes fibrosis and enhances the migration ability in HPFs, and its mechanism may be associated with the upregulation of the TGF-β1 signaling pathway.

Polygonatum sibiricum polysaccharide(PSP)is a polysaccharide with multiple pharma-cological activities that has been widely studied and used in the human body.However,there is cur-rently a lack of research investigating the potential advantages of PSP in poultry farming.This study investigated the effects of adding PSP to drinking water on the growth performance,antioxi-dant status,serum biochemical indicators,ileal tissue morphology,immune organs,and intestinal function of chicks.88 Hailan brown laying hens were randomly divided into 4 groups,with 22 hens in each group,namely the blank control group(CON),and fed with basic feed;The low-dose PSP group(250 mg/L),the medium dose PSP group(500 mg/L),and the high-dose PSP group(1 000 mg/L)were fed with corresponding doses of PSP through drinking water on the basis of basic feed,and the experimental period was 21 d.The initial and final body weight and immune or-gan relative quality of chicks,serum biochemical indicators,the activities of SOD,CAT,and GSH-Px,as well as the contents of T-AOC and MDA in the serum of chicks were measured;HE stai-ning method was used to observe the pathological changes of intestinal tissue slices in the ileum;Real time fluorescence quantitative PCR technology was used to detect the mRNA expression lev-els of cytokines ZO-1,Claudin-1,Occludin,Mucin-2,IL-1β,TNF-a,IFN-γ,IL-4,IL-8,and IL-10 in the ileum.The results showed that compared with the blank control group,the addition of medium dose PSP significantly increased the final relative quality(P＜0.01),the final body weight and ADG of PSP500 group chicks significantly increased(P＜0.01),and the F/G of PSP250 and PSP500 groups significantly decreased(P＜0.05 or P＜0.01).The villus height of the jejunum in the 200,500,and 1 000 mg/L PSP groups of chicks significantly increased(P＜0.05).The SOD ac-tivity significantly increased(P＜0.01),and the CAT activity in the PSP1000 group significantly increased(P＜0.01).The PSP500 and PSP1000 groups significantly reduced the mRNA expression of cytokines IL-1β,IL-4,and IFN-γ in the ileum(P＞0.05);PSP did not show significant changes in serum total protein(TP),albumin(ALB),glucose(GLU),cholesterol(T-CHO)content,and immune organ index(P＜0.05).In summary,PSP can improve growth performance,enhance an-tioxidant capacity,improve ileal morphology and epithelial barrier function,and regulate mucosal immune status.Considering the overall economic benefits,the recommended level of PSP addition is 500 mg/L.

To examine how Lycium barbarum polysaccharide(LBP)impacts reproductive harm caused by perfluorooctanoic acid(PFOA)in male offspring mice.Sixty expectant female rats were randomly allocated into 6 groups,with each group consisting of 10 rats.From 1 to 17 d of gesta-tion,the blank control group was given 0.2 mL deionized water;The PFOA group was given 3.5 mg/kg PFOA;the LBP intervention group were given different doses(40,80,120 mg/kg)of LBP by gavage based on the PFOA group;the control group was given 80mg/kg.At 21 d of age,the offspring mice were weaned,and the offspring male mice were fed normally until 35 d of age,and testicular tissue was taken.HE staining was used to observe the pathological changes of testic-ular tissue sections.Body mass and testicular index were measured.The levels of SOD,MDA,LDH,SHD,GSH-PX and AR in testicular tissue were determined.Serum levels of LH,FSH,Gn-RH and T were determined by ELISA.Differential genes and differential metabolites of testis were analyzed in combination with transcriptome and metabolome.Real-time fluorescence quantitative PCR was used to detect the expression of key genes in fatty acid metabolic pathway.The results showed that LBP could alleviate PFOA-induced decline in body mass and increase testicular index(P＜0.01).LBP could alleviate the necrosis,edema of testicular cells caused by PFOA.LBP can in-crease the contents of SOD,GSH-Px,LDH,SDH and AR in testicular tissue of offspring male mice induced by PFOA,increase the contents of FSH,LH,GnRH and T in serum of offspring male mice,and decrease the content of MDA.Analysis of the transcriptome revealed that 1 388 genes exhibited differential expression between the groups exposed to PFOA and 80 mg/kg LBP,with 696 genes being up-regulated and 692 genes being down-regulated.The differentially ex-pressed genes were predominantly involved in pathways such as fatty acid metabolism,unsaturated fatty acid biosynthesis,cholesterol metabolism,the PPAR signaling pathway,and protein digestion and absorption,with fatty acid metabolism being the most prominent among them.Examination of the metabolome revealed 34 metabolites that were expressed differently between the PFOA group and the 80 mg/kg LBP group.Key metabolic pathways such as fatty acid biosynthesis,unsaturated fatty acid biosynthesis,and steroid hormone biosynthesis were found to be significant.In a joint transcriptome and metabolome analysis,the Differentially expressed genes(DEGs)and Differential expression of metabolites(DEMs)are highly correlated in signaling pathways such as fatty acid bi-osynthesis and unsaturated fatty acid biosynthesis.This study shows that PFOA can cause testicu-lar injury in offspring male mice,and LBP can effectively alleviate the testicular injury caused by PFOA in offspring male mice.Meanwhile,transcriptomic metabolism shows that LBP can effec-tively improve the testicular injury caused by PFOA in offspring male mice through fatty acid bio-synthesis and unsaturated fatty acid biosynthesis signaling pathways.Among them,80 mg/kg LBP has better effect.

At present,malignant tumor diseases occur frequently and increase year by year.Traditional chemoradiotherapy methods are expensive,have serious toxic and side effects,and are easy to reduce patient tolerance.Natural medicines have advantages of multiple targets,high selectivity and low toxicity and side effects in process of anti-tumor,and are one of important sources of anti-tumor drugs.As a polypeptide substance,lactoferrin has a strong anti-tumor effect and plays a huge role in field of nano-drug delivery.Receptors of lactoferrin are widely expressed on surface of various cancer cells.In addition to its strong anti-tumor effect,it is also widely used to modify nanocarriers.In this paper,anti-tumor mechanism of lactoferrin is reviewed,and the latest research progress of using lactoferrin as an anti-cancer drug delivery carrier is also introduced.

Objective:To investigate the role and mechanism of leucine-rich α-2-glycoprotein 1 (LRG1) in the fibrosis of human pterygium fibroblasts (HPFs).Methods:A total of 30 nasal primary pterygium tissues from patients who underwent pterygium excision surgery and 30 nasal normal conjunctival tissues from patients who underwent strabismus correction surgery were collected from the First Affiliated Hospital of Harbin Medical University between January 2022 and March 2023, serving as the pterygium group and normal control group, respectively.LRG1 protein expression in both groups was detected by immunofluorescence staining.The mRNA and protein levels of LRG1 and transforming growth factor-β1 (TGF-β1) were evaluated by quantitative real-time PCR (qRT-PCR) and Western blot.Primary HPFs were cultured from excised pterygium tissues using tissue block adhesion method, and cell morphology was observed.Vmentin and cytokeratin were identified by immunofluorescence staining.HPFs were divided into recombinant human LRG1 (rhLRG1) group and blank control group treated with or without 10 μg/ml rhLRG1 for 24 hours, respectively, and cell migration was evaluated via scratch assay.Additionally, HPFs were divided into blank control group, LRG1 overexpression group and LRG1 knockdown group.HPFs in LRG1 overexpression group and LRG1 knockdown group were transfected with LRG1 overexpression plasmids and small interfering RNA for 24 hours, respectively.TGF-β1 mRNA level was evaluated by qRT-PCR and expression of TGF-β1, fibronectin (FN), type Ⅲ collagen (COL3), and α-smooth muscle actin (α-SMA) proteins were evaluated by Western blot.This study adhered to the Declaration of Helsinki.The study protocol was approved by the Ethics Committee of the First Affiliated Hospital of Harbin Medical University (No.2022IIT026).Written informed consent was obtained from each subject.Results:HPFs were successfully isolated, exhibiting spindle-shaped morphology with whorled arrangement, positive identification for vimentin, and negative immunofluorescence staining for cytokeratin.The migration rate of the rhLRG1 group was (83.01±2.56)%, significantly higher than (50.32±4.97)% of the blank control group ( t=9.59, P<0.001).Immunofluorescence staining results showed that compared with normal conjunctival tissue, LRG1 protein was significantly higher expressed in pterygium tissue and was widely distributed in fibrous connective tissue and epithelial layer.Both mRNA and protein levels of LRG1 and TGF-β1 were significantly higher in the pterygium group than in the normal control group (mRNA: t=10.18, 6.15, both P<0.05.protein: t=6.83, 8.79, both P<0.05).In the LRG1 overexpression group, mRNA level of TGF-β1, and protein levels of FN, COL3 and α-SMA were significantly increased compared with the blank control and LRG1 knockdown groups (all P<0.05). Conclusions:LRG1 promotes fibrosis and enhances the migration ability in HPFs, and its mechanism may be associated with the upregulation of the TGF-β1 signaling pathway.

Objective To investigate the causal relationship between frailty and epilepsy based on the traditional Chinese medicine(TCM)theory of"epilepsy caused by frailty"utilizing a two-sample Mendelian randomization approach,to enrich the modern connota-tion of the"epilepsy caused by frailty"theory and provide a theoretical basis for treating epilepsy from a frailty perspective in TCM.Methods Data on frailty and epilepsy were extracted from publicly available genome-wide association study summary datasets.Single nucleotide polymorphism(SNP)were selected as instrumental variable under the conditions of P＜5 x 10-8,a linkage disequilibrium co-efficient of 0.001,and a linkage disequilibrium region width of 10000kb.Mendelian randomization analysis was performed using five methods:MR-Egger regression,weighted median,inverse variance weighting,simple mode and weighted mode,with inverse variance weighting as the primary analysis method.The causal relationship between frailty and epilepsy was interpreted using OR and 95％CI.Pleiotropy was assessed using the MR-Egger intercept and MR-PRESSO analysis methods,while heterogeneity was analyzed using MR-Egger Cochran's Q test,and sensitivity analysis was conducted using the leave-one-out method.Results The results of inverse variance weighting and weighted median analysis indicated that there was a positive causal relationship between frailty and epilepsy.This result passed pleiotropy tests,confirming its robustness.Conclusion Frailty is associated with an increased risk of epilepsy,which is consistent with the TCM understanding of"epilepsy caused by frailty".It is suggested that in clinical treatment,besides conventional ap-proaches such as resolving phlegm,eliminating blood stasis,calming wind,and opening orifices,there should be a greater emphasis on tonifying frailty and nurturing the body's vital energy.