Objective: To examine the effects of combined aerobic and resistance exercise on health related physical fitness (HPF) and depressive symptoms among senior high school freshmen, and to examine whether HPF mediates the relationship between exercise intervention and depressive symptoms, so as to provide a scientific basis for the coordinated promotion of mental health and physical fitness in schools. Methods: In March 2022, 190 senior high school freshmen from a secondary school of Suzhou in Anhui Province were selected by the random cluster sampling method and randomly assigned to an intervention group ( n = 99) and a control group ( n =91). The control group maintained routine activities, while the intervention group underwent a 10 week combined aerobic and resistance exercise program, three sessions per week, 40 minutes per session. Height, weight, standing long jump, sit ups, 20 m shuttle run, and sit and reach were measured before and after the intervention. Depressive symptoms were assessed using the Center for Epidemiological Studies Depression Scale (CES-D). Analysis of covariance (ANCOVA), Mann-Whitney U test, and Wilcoxon test were employed to compare outcomes before and after the intervention, and mediation analysis was conducted. Results: After controlling for pre test scores, ANCOVA results showed that compared with the control group, the intervention group demonstrated the following post intervention changes: a lower body mass index of 0.1 kg/m 2 among girls; higher standing long jump (13.2 cm for boys, 7.4 cm for girls), higher sit ups (5.5 reps for boys, 3.7 reps for girls), higher 20 m shuttle run (7.4 times for boys, 5.1 times for girls), and higher sit and reach (3.2 cm for boys, 0.4 cm for girls) ( F =17.88-84.44); and lower CES-D scores (5.5 for boys, 4.0 for girls) ( Z =-2.51, -2.06) (all P <0.05). The indirect effect of HPF in the relationship between combined aerobic and resistance exercise and depressive symptoms was -2.11, supporting a partial mediation effect ( P < 0.01 ). Conclusions Combined aerobic and resistance exercise improves HPF and alleviates depressive symptoms to varying degrees among senior high school freshmen. HPF served as a partial mediator through which exercise intervention reduces depressive symptoms.

Objective:To analyze the etiological characteristics of Clostridium ramosum DZS3717106 isolated from the blood of a patient with septic shock secondary to perianal abscess and the immunological characteristics of the patient. Methods:The isolate was subjected to morphological observation, mass spectrometry, antibiotic susceptibility testing, and 16S rRNA sequencing. Biochemical and cytological test results of the patient were collected. Flow cytometry was used to detect T cell subsets. Impacts of the virulence factors of the isolate on the host immune system were evaluated.Results:DZS3717106 was an anaerobic Clostridium with pleomorphic rod-shaped cells and spores. It was sensitive to penicillin G, piperacillin/tazobactam, and metronidazole, but resistant to clindamycin. It carried various virulence and resistance genes. The patient was immunocompromised with abnormal IL-6, IL-8, and IL-10 levels. Conclusions:Septic shock caused by Clostridium ramosum is rare, and more research is needed on the causes and epidemiology. DZS3717106 infection triggers over-activated inflammatory response in the patient, which may be closely related to the occurrence and development of septic shock.

Objective:To investigate the role of Platycoside E(PE)in a mouse model of bleomycin(BLM)-induced pulmonary fibrosis by targeting the JAK/STAT signaling pathway to suppress macrophage M2 polarization.Methods:Forty BALB/c mice were randomly assigned to five experimental groups:blank control group,model group,pirfenidone(PDF)experimental group,PE high-dose group and PE low-dose experimental group,each with eight mice.After adaptive feeding,except for blank control group,all mice were used in the model of BLM nasal drip-induced pulmonary fibrosis.HE and Masson staining were employed to examine pathological alterations of lung tissue in mice;ELISA to detect concentrations of IL-10,IL-4,IL-17A and TNF-α in mice serum;expressions of CD206 and CD11b in lung tissue were detected by immunofluorescence.Western blot to detect protein expressions of JAK1,p-JAK1,STAT6 and p-STAT6 in lung tissues.Results:Compared with blank control group,tissues in model group showed distorted structure and thickened alveolar walls,fibrotic foci were formed,and alveolar inflammatory fraction and collagen volume fraction were significantly increased(P<0.01).ELISA showed that concentrations of IL-4,IL-10,IL-6 and TNF-α in serum were significantly reduced compared to those of model group.Immunofluorescence showed that fluorescence intensity of CD11b and CD206 treated by PE were decreased significantly.Western blot showed that expressions of JAK1,p-JAK,STAT6 and p-STAT6 proteins were significantly elevated in lung tissues of model mice.Following PE treatment,levels of the above proteins were diminished.Conclusion:PE can effectively improve lung fibrosis induced by BLM in mice,the mechanism may be related to the inhibition of JAK/STAT pathway to block macrophage M2 polarization.

Objective:To explore the relationship between suicide attempts,school bullying,and psychological resilience in children and adolescents with major depressive disorder(MDD)and school bullying and psychological resilience.Methods:A total of 784 patients with MDD aged 10 to 18 years were included.The Chinese version of the Olweus Bullying Victimization Questionnaire,Adolescent Psychological Resilience Scale,and a suicide attempt assessment were utilized to evaluate school bullying,psychological resilience,and suicide attempt.Stepwise logistic regression was applied to identify the associated factors of suicide attempts.Results:The occurrence of suicide at-tempts in children and adolescents with MDD was positively associated with physical bullying(OR=1.85,95％CI:1.14-3.02)and indirect bullying(OR=1.48,95％CI:1.06-2.04),and negatively associated with higher levels of goal focus(OR=0.62,95％CI:0.45-0.85)and positive cognition(OR=0.62,95％CI:0.45-0.85)at higher levels.Conclusion:Bullying significantly increases the risk of suicide attempts in children and adolescents with MDD,while higher psychological resilience could mitigate this risk.

Objective:To explore the relationship between suicide attempts,school bullying,and psychological resilience in children and adolescents with major depressive disorder(MDD)and school bullying and psychological resilience.Methods:A total of 784 patients with MDD aged 10 to 18 years were included.The Chinese version of the Olweus Bullying Victimization Questionnaire,Adolescent Psychological Resilience Scale,and a suicide attempt assessment were utilized to evaluate school bullying,psychological resilience,and suicide attempt.Stepwise logistic regression was applied to identify the associated factors of suicide attempts.Results:The occurrence of suicide at-tempts in children and adolescents with MDD was positively associated with physical bullying(OR=1.85,95％CI:1.14-3.02)and indirect bullying(OR=1.48,95％CI:1.06-2.04),and negatively associated with higher levels of goal focus(OR=0.62,95％CI:0.45-0.85)and positive cognition(OR=0.62,95％CI:0.45-0.85)at higher levels.Conclusion:Bullying significantly increases the risk of suicide attempts in children and adolescents with MDD,while higher psychological resilience could mitigate this risk.

Objective:To investigate the role of Platycoside E(PE)in a mouse model of bleomycin(BLM)-induced pulmonary fibrosis by targeting the JAK/STAT signaling pathway to suppress macrophage M2 polarization.Methods:Forty BALB/c mice were randomly assigned to five experimental groups:blank control group,model group,pirfenidone(PDF)experimental group,PE high-dose group and PE low-dose experimental group,each with eight mice.After adaptive feeding,except for blank control group,all mice were used in the model of BLM nasal drip-induced pulmonary fibrosis.HE and Masson staining were employed to examine pathological alterations of lung tissue in mice;ELISA to detect concentrations of IL-10,IL-4,IL-17A and TNF-α in mice serum;expressions of CD206 and CD11b in lung tissue were detected by immunofluorescence.Western blot to detect protein expressions of JAK1,p-JAK1,STAT6 and p-STAT6 in lung tissues.Results:Compared with blank control group,tissues in model group showed distorted structure and thickened alveolar walls,fibrotic foci were formed,and alveolar inflammatory fraction and collagen volume fraction were significantly increased(P<0.01).ELISA showed that concentrations of IL-4,IL-10,IL-6 and TNF-α in serum were significantly reduced compared to those of model group.Immunofluorescence showed that fluorescence intensity of CD11b and CD206 treated by PE were decreased significantly.Western blot showed that expressions of JAK1,p-JAK,STAT6 and p-STAT6 proteins were significantly elevated in lung tissues of model mice.Following PE treatment,levels of the above proteins were diminished.Conclusion:PE can effectively improve lung fibrosis induced by BLM in mice,the mechanism may be related to the inhibition of JAK/STAT pathway to block macrophage M2 polarization.

Objective:To analyze the etiological characteristics of Clostridium ramosum DZS3717106 isolated from the blood of a patient with septic shock secondary to perianal abscess and the immunological characteristics of the patient. Methods:The isolate was subjected to morphological observation, mass spectrometry, antibiotic susceptibility testing, and 16S rRNA sequencing. Biochemical and cytological test results of the patient were collected. Flow cytometry was used to detect T cell subsets. Impacts of the virulence factors of the isolate on the host immune system were evaluated.Results:DZS3717106 was an anaerobic Clostridium with pleomorphic rod-shaped cells and spores. It was sensitive to penicillin G, piperacillin/tazobactam, and metronidazole, but resistant to clindamycin. It carried various virulence and resistance genes. The patient was immunocompromised with abnormal IL-6, IL-8, and IL-10 levels. Conclusions:Septic shock caused by Clostridium ramosum is rare, and more research is needed on the causes and epidemiology. DZS3717106 infection triggers over-activated inflammatory response in the patient, which may be closely related to the occurrence and development of septic shock.

Ferroptosis is a new type of cell death proposed in recent years,and its main characteristics are iron overload and lipid peroxidation.Ferroptosis is involved in the occurrence and development of non-alcoholic fatty liv-er disease(NAFLD).Iron overload can generate a large amount of reactive oxygen species through the Fenton reac-tion.Under the action of lipoxygenase,the unsaturated fatty acids on the liver cell membrane undergo lipid peroxi-dation,which induces liver cell death and leads to the occurrence of non-alcoholic fatty liver disease/non-alcoholic steatohepatitis.Blocking ferroptosis may provide one of the therapeutic strategies to protect liver cells.

ObjectiveTo investigate the effect of community-based rehabilitation exercise and physical activity on the physical activity levels, functional states, and quality of life for people with mild and moderate disabilities in community settings, to ascertain the health benefits of their engagement in such fitness sports activities, anchoring in the WHO "Global Action Plan on Physical Activity 2018-2030: More Active People for a Healthier World" and the guidelines tailored for people with disabilities, using the theoretical framework and methodology of the International Classification of Functioning, Disability and Health (ICF). MethodsAligning with the WHO guidelines for people with disabilities and the ICF, a community-based rehabilitation exercise and physical activity program was designed for individuals with mild to moderate disabilities, featuring activities like fitness training (aerobic and resistance exercises), skill exercises (such as balance and coordination), as well as sports and recreational games (ball and games, etc.). A total of 230 people with mild and moderate disabilities were recruited from 20 communities in Shenzhen, with types of disabilities including physical, speech, intellectual, and mental. Professional rehabilitation fitness instructors implemented and supervised the program. The activities were of low to moderate intensity, 30 to 50 minutes per session, five times a month for six months. The community-based rehabilitation exercise and physical activity progress of these individuals was surveyed using the International Physical Activity Questionnaire (IPAQ), and their overall functioning was evaluated with WHODAS 2.0. The health-related quality of life was measured with WHOQOL-BREF. The health benefits from participation in community-based rehabilitation exercise and physical activity were assessed in terms of functioning, activity involvement, and quality of life. ResultsAfter the fitness activities, participation levels significantly increased in IPAQ domains of work-related, transport-related, domestic and gardening activity, and leisure time (|t| > 3.391, P < 0.001). The scores significantly decreased in the domains of cognition, activity, self-care, getting along, life activities and participation; and overall scores also decreased in WHODAS 2.0 (t > 6.639, P < 0.001). The scores significantly increased in the four dimensions of WHOQOL-BREF (|t| > 7.486, P < 0.001). ConclusionAfter participating in a six-month community-based rehabilitation exercise and physical activity program of mild to moderate intensity, individuals with mild to moderate disabilities have improved in physical activity and engagement levels, and the overall functioning and quality of life.

Objective To construct a recombinant poxvirus vector vaccine, rVTTδTK-RBD, and to evaluate its safety and immunogenicity. Methods The receptor-binding domain (RBD) gene was synthesized with reference to the gene sequence of severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) and was inserted into the polyclonal site of the self-constructed recombinant plasmid pSTKE, to construct the recombinant poxvirus shuttle vector pSTKE-RBD. This was then transfected into BHK-21 cells pre-infected with the vaccinia virus Tiantan strain (VTT). The recombinant poxvirus rVTTδTK-RBD was successfully obtained after several rounds of fluorescence phage screening. The effect of rVTTδTK-RBD on the body mass of BALB/c mice was detected after immunizing mice by intra-nasal vaccination. The levels of specific and neutralizing antibodies produced by rVTTδTK-RBD on BALB/c mice were analyzed after immunizing mice intramuscularly. The effect of rVTTδTK-RBD on T cell subsets in BALB/c mice was detected by flow cytometry. Results Through homologous recombination, enhanced green fluorescent protein (EGFP) screening marker, and multiple rounds of fluorescent phosphorescence phage screening, a recombinant poxvirus rVTTδTK-RBD, expressing RBD with deletions in the thymidine kinase (TK) gene, was successfully obtained, which was validated by PCR. The in vivo experiments on BALB/c mice showed that rVTTδTK-RBD was highly immunogenic against SARS-CoV-2 and significantly reduced toxicity to the body compared to the parental strain VTT. Conclusion The recombinant poxvirus vaccine rVTTδTK-RBD against SARS-CoV-2 is successfully constructed and obtained, with its safety and immunogenicity confirmed through various experiments.
Animals ; Mice ; SARS-CoV-2/genetics* ; COVID-19 ; Vaccines, Synthetic/genetics* ; Genes, Reporter ; Bacteriophages ; Mice, Inbred BALB C