Objective: To evaluate the current situation of thermal environment in primary and secondary school classrooms during winter, and to analyze students thermal comfort needs, so as to provide a basis for improving classroom thermal environment. Methods: From December 16 to 26, 2024, a stratified cluster random sampling method was used to select 90 classrooms from 15 primary and secondary schools in centralized/air conditioned heating areas(Liaoning Province, Tianjin City, Shanghai City) and naturally ventilated areas(Anhui Province and Jiangxi Province)for on site environmental measurement. A questionnaire survey was conducted among 743 students. The differences between groups using the χ 2 test were compared. Based on actual measurement data, a predicted mean vote prepared percentage of dissatisfied (PMV-PPD) model for centralized/air conditioned classrooms and an adaptive model for naturally ventilated classrooms were established, and the thermal neutral temperature and comfort interval were calculated. Results: The average outdoor temperature during on site measurement was 4.00(0.20，7.00)℃. In classrooms with centralized or air conditioned heating systems, the measured average temperature was (19.33±2.59)℃, with a thermal comfort range of 20.35-25.35 ℃ and a thermal neutral temperature of 22.85 ℃. And 13.92% of students reported feeling cold, while 80.80% felt comfortable. In classrooms with natural ventilation, the measured average temperature was (12.26±1.83)℃, with a thermal neutral temperature of 19.67 ℃ and a thermal comfort range of 16.17-23.17 ℃. About 48.33% of students reported feeling cold, and 49.81 % felt comfortable.The results of univariate analysis showed that there were statistically significant differences in shoe thickness, temperature sensation, relative humidity sensation and wind speed sensation between centralized/air conditioned heating areas ( χ 2= 7.01 , 31.47, 13.57, 13.80,all P <0.05). There were also statistically significant differences in school stage for primary and secondary school students, body mass index, classroom location for seat, temperature sensation, relative humidity sensation and wind speed sensation between naturally ventilated areas ( χ 2=42.13, 11.13, 11.04, 60.39, 29.27, 38.46,all P <0.05). Conclusions There are differences in thermal environment and students subjective thermal comfort in primary and secondary schools under different ventilation modes in winter. The temperature standards for heated classrooms should be revised, and differentiated environmental regulation strategies should be adopted based on different ventilation methods to improve students health and comfort levels.

Depression, a prevalent mental disorder with significant socioeconomic burdens, underscores the urgent need for safe and effective non-pharmacological interventions. Recent advances in microbiome research have revealed the pivotal role of gut microbiota dysbiosis in the pathogenesis of depression. Concurrently, exercise, as a cost-effective and accessible intervention, has demonstrated remarkable efficacy in alleviating depressive symptoms. This comprehensive review synthesizes current evidence on the interplay among exercise, gut microbiota modulation, and depression, elucidating the mechanistic pathways through which exercise ameliorates depressive symptoms via the microbiota-gut-brain (MGB) axis. Depression is characterized by gut microbiota alterations, including reduced alpha and beta diversity, depletion of beneficial taxa (e.g., Bifidobacterium, Lactobacillus, and Coprococcus), and overgrowth of pro-inflammatory and pathogenic bacteria (e.g., Morganella, Klebsiella, and Enterobacteriaceae). Metagenomic analyses reveal disrupted metabolic functions in depressive patients, such as diminished synthesis of short-chain fatty acids (SCFAs), impaired tryptophan metabolism, and dysregulated bile acid conversion. For instance, Bifidobacterium longum deficiency correlates with reduced synthesis of neuroactive metabolites like homovanillic acid, while decreased Coprococcus abundance limits butyrate production, exacerbating neuroinflammation. Furthermore, elevated levels of indole derivatives from Clostridium species inhibit serotonin (5-HT) synthesis, contributing to depressive phenotypes. These dysbiotic profiles disrupt the MGB axis, triggering systemic inflammation, neurotransmitter imbalances, and hypothalamic-pituitary-adrenal (HPA) axis hyperactivity. Exercise exerts profound effects on gut microbiota composition, diversity, and metabolic activity. Longitudinal studies demonstrate that sustained aerobic exercise increases alpha diversity, enriches SCFA-producing genera (e.g., Faecalibacterium prausnitzii, Roseburia, and Akkermansia), and suppresses pathobionts (e.g., Desulfovibrio and Streptococcus). For example, a meta-analysis of 25 trials involving 1 044 participants confirmed that exercise enhances microbial richness and restores the Firmicutes/Bacteroidetes ratio, a biomarker of metabolic health. Notably, endurance training promotes Veillonella proliferation, which converts lactate into propionate, enhancing energy metabolism and delaying fatigue. Exercise also strengthens intestinal barrier integrity by upregulating tight junction proteins (e.g., ZO-1, occludin), thereby reducing lipopolysaccharide (LPS) translocation and systemic inflammation. However, excessive exercise may paradoxically diminish microbial diversity and exacerbate intestinal permeability, highlighting the importance of moderate intensity and duration. Exercise ameliorates depressive symptoms through multifaceted interactions with the gut microbiota, primarily via 4 interconnected pathways. First, exercise mitigates neuroinflammation by elevating anti-inflammatory SCFAs such as butyrate, which suppresses NF-κB signaling to attenuate microglial activation and oxidative stress in the hippocampus. Animal studies demonstrate that voluntary wheel running reduces hippocampal TNF‑α and IL-17 levels in stress-induced depression models, while fecal microbiota transplantation (FMT) from exercised mice reverses depressive behaviors by modulating the TLR4/NF‑κB pathway. Second, exercise regulates neurotransmitter dynamics by enriching GABA-producing Lactobacillus and Bifidobacterium, thereby counteracting neuronal hyperexcitability. Aerobic exercise also enhances the abundance of Lactobacillus plantarum and Streptococcus thermophilus, which facilitate 5-HT and dopamine synthesis. Clinical trials reveal that 12 weeks of moderate exercise increases fecal Coprococcus and Blautia abundance, correlating with improved 5-HT bioavailability and reduced depression scores. Third, exercise normalizes HPA axis hyperactivity by reducing cortisol levels and restoring glucocorticoid receptor sensitivity. In rodent models, chronic stress-induced corticosterone elevation is reversed by probiotic supplementation (e.g., Lactobacillus), which enhances endocannabinoid signaling and hippocampal neurogenesis. Furthermore, exercise upregulates brain-derived neurotrophic factor (BDNF) via microbial metabolites like butyrate, promoting histone acetylation and synaptic plasticity. FMT experiments confirm that exercise-induced microbiota elevates prefrontal BDNF expression, reversing stress-induced neuronal atrophy. Fourth, exercise reshapes microbial metabolic crosstalk, diverting tryptophan metabolism toward 5-HT synthesis instead of neurotoxic kynurenine derivatives. Butyrate inhibits indoleamine 2,3-dioxygenase (IDO), a key enzyme in the kynurenine pathway linked to depression. Concurrently, exercise-induced Akkermansia enrichment enhances mucin production, fortifies the gut barrier, and reduces LPS-driven neuroinflammation. Collectively, these mechanisms underscore exercise as a potent modulator of the microbiota-gut-brain axis, offering a holistic approach to alleviating depression through microbial and neurophysiological synergy. Current evidence supports exercise as a potent adjunct therapy for depression, with personalized regimens (e.g., aerobic, resistance, or yoga) tailored to individual microbiota profiles. However, challenges remain in optimizing exercise prescriptions (intensity, duration, and type) and integrating them with probiotics, prebiotics, or FMT for synergistic effects. Future research should prioritize large-scale randomized controlled trials to validate causality, multi-omics approaches to decipher MGB axis dynamics, and mechanistic studies exploring microbial metabolites as therapeutic targets. The authors advocate for a paradigm shift toward microbiota-centric interventions, emphasizing the bidirectional relationship between physical activity and gut ecosystem resilience in mental health management. In conclusion, this review underscores exercise as a multifaceted modulator of the gut-brain axis, offering novel insights into non-pharmacological strategies for depression. By bridging microbial ecology, neuroimmunology, and exercise physiology, this work lays a foundation for precision medicine approaches targeting the gut microbiota to alleviate depressive disorders.

Objective:To analyze the clinical characteristics of patients with chronic obstructive pulmonary disease (COPD) complicated by fatigue.Methods:COPD patients enrolled in the RealDTC study from June 2023 to March 2024 were included. Demographic data, history of acute exacerbations in the past year, smoking status, biofuel exposure, occupational exposure, modified Medical Research Council (mMRC) dyspnea score, COPD Assessment Test (CAT) score, forced expiratory volume in the first second predicted of percentage (FEV 1%pred), forced expiratory volume in one second (FEV 1)/forced vital capacity (FVC), and comorbidities (bronchial asthma, bronchiectasis, tuberculosis, cardiovascular disease, diabetes mellitus) were collected. Fatigue was evaluated using the Functional Assessment of Chronic Illness Therapy-Fatigue (FACIT-F) questionnaire, with a score ≤43 defined as fatigue. Patients were divided into fatigue and non-fatigue groups, and multivariate regression analysis was used to screen factors associated with fatigue in COPD patients. Results:A total of 597 COPD patients were included, of which 280(46.9%) had fatigue symptoms. Compared with non-fatigue patients, fatigue patients had lower FEV 1%pred, FEV 1/FVC, and body mass index (BMI), higher CAT and mMRC scores, and a higher proportion of occupational exposure, bronchiectasis, and treatment with long-acting β 2-agonists (LABA)/long-acting muscarinic antagonists (LAMA)/inhaled corticosteroids (ICS) (all P<0.05). Multivariate regression analysis showed that high CAT score ( OR=2.312, 95% CI: 1.366-3.911), high mMRC score ( OR=1.484, 95% CI: 1.053-2.091), occupational exposure ( OR=1.513, 95% CI: 1.082-2.116), comorbid bronchiectasis ( OR=2.452, 95% CI: 1.102-5.457), low BMI ( OR=0.935, 95% CI: 0.891-0.981), and high CAT-energy score ( OR=1.301, 95% CI: 1.149-1.473) were risk factors for fatigue in COPD patients. The CAT-energy score was highly correlated with the FACIT-F score ( r=0.260, P<0.001), and a CAT-energy score ≥2 could preliminarily screen COPD patients with fatigue. Conclusions:COPD patients with comorbid fatigue have a heavy symptom burden, are more likely to have a history of occupational exposure and bronchiectasis, and the CAT-energy score is of great reference value for screening COPD patients with fatigue.

Objective:To analyze the clinical characteristics of patients with chronic obstructive pulmonary disease (COPD) complicated by anorexia.Methods:This cross-sectional study included patients registered in the RealDTC study from May 2023 to December 2023. Demographic data, COPD Assessment Test (CAT) score, modified Medical Research Council (mMRC) dyspnea questionnaire score, Clinical COPD Questionnaire (CCQ) score, forced expiratory volume in one second (FEV 1), forced expiratory volume in the first second predicted of percentage (FEV 1%pred), FEV 1/forced vital capacity (FVC), Global Initiative for Chronic Obstructive Lung Disease (GOLD) grade, GOLD group, number of acute exacerbations and hospitalizations in the past year, and score of the Functional Assessment of Anorexia Cachexia Therapy-Anorexia/Cachexia Subscale-12 (FAACT-A/CS-12) were collected. Patients with a FAACT-A/CS-12 score ≤30 were diagnosed as having anorexia. Multivariate logistic regression analysis was used to evaluate the influencing factors of anorexia in COPD patients. Results:A total of 617 COPD patients were included, of whom 109(17.7%) had anorexia. Compared with non-anorexia patients, COPD patients with anorexia had higher age, CAT, mMRC and CCQ scores, and more acute exacerbations and hospitalizations in the past year, while body mass index, FEV 1, FEV 1%pred and FEV 1/FVC were lower (all P<0.05). The proportions of patients with primary education or below, GOLD 3-4 grade and GOLD E group were higher in COPD patients with anorexia (all P<0.05). Logistic regression analysis showed that a CAT score of 10-<20 [odds ratio ( OR)=4.017, 95% confidence interval ( CI): 1.673-59.645], a CAT score of 20-<30 ( OR=9.686, 95% CI: 3.777-24.842), a CAT score of ≥30 ( OR=78.286, 95% CI: 7.654-800.689) and ≥1 hospitalization in the past year ( OR=2.050, 95% CI: 1.292-3.254) were independent risk factors for anorexia in COPD patients (all P<0.05). Conclusions:COPD patients with anorexia have poor lung function, high symptom burden and high risk of acute exacerbation. Clinicians should pay attention to the management of COPD patients with anorexia and take corresponding intervention measures.

Objective:To analyze the clinical characteristics of frailty in elderly patients with chronic obstructive pulmonary disease (COPD).Methods:COPD patients aged ≥65 years registered in the RealDTC study from June 2023 to March 2024 were included. Demographic data, history of exacerbations in the past year, exposure to risk factors (smoking, biomass fuel exposure, occupational exposure), modified Medical Research Council (mMRC) dyspnea score, COPD Assessment Test (CAT) score, forced expiratory volume in the first second predicted of percentage (FEV 1%pred), forced expiratory volume in one second (FEV 1) to forced vital capacity (FVC), and comorbidities (bronchial asthma, bronchiectasis, pulmonary tuberculosis, cardiovascular disease, diabetes mellitus) were collected. According to Fried′s frailty phenotype, patients meeting any 3 of the 5 criteria were defined as frail and divided into a frailty group and a non-frailty group. Multivariate regression analysis was used to screen the related factors of frailty in elderly COPD patients, and the receiver operating characteristic (ROC) curve was used to calculate the area under the curve (AUC) of related factors for frailty assessment. Results:A total of 496 elderly COPD patients were included, of which 144(29.0%) had comorbid frailty. The frailty group had lower mass body index (BMI), FEV 1%pred, and FEV 1/FVC, higher mMRC and CAT scores, more exacerbations and hospitalizations in the past year (all P<0.001), and higher proportions of patients with junior high school education or below, Global Initiative for Chronic Obstructive Lung Disease (GOLD) group E, and GOLD grades 3 and 4 (all P<0.05). Multivariate regression analysis showed that low education level ( OR=2.117, 95% CI: 1.119-4.003), low BMI ( OR=0.927, 95% CI: 0.867-0.991), GOLD grade 4 ( OR=4.251, 95% CI: 1.477-12.235), high CAT score ( OR=1.174, 95% CI: 1.127-1.224), and high mMRC score ( OR=4.578, 95% CI: 3.364-6.231) were independent risk factors for frailty in elderly COPD patients (all P<0.05). The ROC curve showed that CAT score (AUC=0.78) and mMRC score (AUC=0.81) had the highest AUC for assessing frailty in elderly COPD patients. Conclusions:Elderly COPD patients with frailty have lower BMI, worse lung function, and more severe symptom burden. The results provide clinical reference for the management of frail elderly COPD patients.

Objective To develop a portable heat illness/stroke first-aid kit for on-site first aid of heat illness patients and verify its application effect.Methods The portable heat illness/stroke first-aid kit was composed of a main box,an adjustable telescopic rod,adjustable shoulder straps,universal rollers and a thermal insulation container.The main box made of aluminum alloy material had the inner surface lined with Oxford cloth,which was equipped with an infrared cochlear thermometer,a nebulizer,first aid medicines,heat stroke medicines,a sun umbrella,a cooling blanket,etc;the adjustable telescopic rod was made of aluminum-magnesium alloy;the adjustable shoulder straps was made of high-density nylon webbing;the universal rollers were rubberized and had wheel brakes;the thermal insulation container was located in the lower storage compartment inside the main box,which used polyurethane(PU)material for thermal insulation.The data on on-site first aid of the patients with moderate heat illness or stroke at some institution from 2019 to 2022 were analyzed retrospectively,with the patients treated with the traditional methods enrolled into a control group and the ones with the first-aid kit into an experimental group.The temperature changes at 0,10,20,30,40,50 and 60 min after the start of treatment were investigated to compare the cooling effects of the two groups.Results The heat illness/stroke first-aid kit lowered the patient temperature effectively during the on-site first aid of the patients with moderate heat illness or stroke,with higher cooling speed and effect than the traditional methods,especially at the early stage of treatment.Conclusion The heat illness/stroke first-aid kit with complete functions and easy operation decreases temperature of heat illness patients efficiently,and can be applicable to the scenarios such as field training and outdoors high-temperature operation.[Chinese Medical Equipment Journal,2025,46(9):108-113]

Objective:To explore the clinical characteristics and prognostic risk factors of Mycoplasma pneumoniae pneumonia(MPP)in adults across different age groups,providing evidence for age-stratified management strategies.Methods:A retrospective analysis was conducted on 80 MPP patients admitted to the Respiratory Department of a hospital between January 2023 and December 2024.Patients were divided into three groups based on age:young adults(18-40 years),middle-aged adults(41-60 years),and elderly adults(≥ 61 years).Demographic features,clinical indicators,and mixed infections were analyzed.Univariate and multivariate Logistic regression were used to identify risk factors for disease severity.Results:The severity rate was significantly higher in the elderly group(41.2％)compared to the young adult group(7.1％)and middle-aged group(20.0％)(P=0.022).Elderly patients also exhibited significantly higher rates of underlying diseases(chronic lung disease:35.3％vs.3.6％in young adults),elevated inflammatory markers(C-reactive protein:68.3±19.5 mg/L vs.32.5±8.4 mg/L in young adults),mixed infections(52.9％vs.14.3％),and prolonged hospital stays(8.61±2.22 days vs.5.01±1.11 days)(P＜0.05).Multivariate analysis identified age(OR=1.79 per 10 years),chronic lung disease(OR=3.25),blood urea nitrogen ≥6 mmol/L(OR=2.44),and mixed infections(OR=4.26)as independent risk factors for severe MPP(P＜0.05).Conclusion:Clinical manifestations and prognoses of MPP in adults vary significantly across age groups.Elderly patients are characterized by high mixed infection rates,intense inflammatory responses,and renal function impairment,necessitating individualized monitoring and intervention strategies.

Objective:To explore the characteristics and influencing factors of risk perception related to additional injury during motor rehabilitation in stroke patients with hemiplegia, and to provide a foundation for the development of assessment tools and prevention strategies.Methods:A purposive sampling strategy combined with maximum variation sampling was employed to select 15 stroke patients with hemiplegia who were hospitalized in the Department of Neurology and Department of Rehabilitation at Northern Jiangsu People's Hospital between January and April 2024. Face-to-face, semi-structured in-depth interviews were conducted. Data were analyzed and thematically extracted using Colaizzi seven-step method.Results:Each interview lasted between 25 and 47 minutes, totaling 547 minutes of interview time and approximately 92 000 words of transcription. A total of 3 major themes were identified: characteristics of risk perception regarding additional injury during motor rehabilitation, multidimensional influencing factors of risk perception, and perceived severity of additional injury.Conclusions:Stroke patients with hemiplegia exhibit diverse and dynamic risk perception characteristics regarding additional injury during motor rehabilitation, which are influenced by multiple interrelated factors. A generally low and inaccurate level of risk perception was observed. Medical staff should pay greater attention to improving the accuracy of patients' risk perception, enhancing risk assessment mechanisms, and developing targeted prevention strategies to help patients avoid additional injuries and maximize the benefits of motor rehabilitation.

A recombinant adenovirus(rAd)for expression of Mycobacterium tuberculosis(M.tb)c-di-AMP phosphodiesterase CnpB was constructed,and its induced humoral immune response was detected.The codon-optimized gene of M.tb CnpB was cloned into the adenoviral plasmid pcADV.The recombinant plasmid pcADV-CnpB was transfected into HEK293T cells,and expression was detected with Western blot.The recombinant plasmid pcADV-CnpB and the backbone plasmid were co-transfected into HEK293T cells to obtain the recombinant adenovirus rAd-CnpB.rAd-CnpB was amplified in HEK293T cells,and the target protein expression of rAd-CnpB was detected with Western blot and immunofluorescence.Mice were immunized with rAd-CnpB intranasally,and their sera and bronchoalveolar lavage fluid(BALF)were collected.ELISA was used to detect levels of antigen-specific antibodies.Restriction enzyme digestion and sequencing indicated that the recombinant plasmid pcADV-CnpB was successfully constructed and led to protein expression in eukaryotic cells.rAd-CnpB was packaged and produced in HEK293T cells.After amplification and purification,rAd-CnpB with a titer of 5.53×1010 PFU/mL was obtained.rAd-CnpB led to CnpB expression in HEK293T cells.Intranasal immunization with rAd-CnpB increased levels of IgG and secretory IgA in BALF and led to high levels of IgG in sera.rAd-CnpB,the recombinant adenovirus for expression of c-di-AMP phosphodiesterase CnpB was successfully constructed,and was found to induce antigen-specific humoral and mucosal immune responses through mucosal immunization.Thus,rAd-CnpB may be used in further research on new TB vaccine strategies.

Objective:To analyze the clinical characteristics of patients with chronic obstructive pulmonary disease (COPD) complicated by fatigue.Methods:COPD patients enrolled in the RealDTC study from June 2023 to March 2024 were included. Demographic data, history of acute exacerbations in the past year, smoking status, biofuel exposure, occupational exposure, modified Medical Research Council (mMRC) dyspnea score, COPD Assessment Test (CAT) score, forced expiratory volume in the first second predicted of percentage (FEV 1%pred), forced expiratory volume in one second (FEV 1)/forced vital capacity (FVC), and comorbidities (bronchial asthma, bronchiectasis, tuberculosis, cardiovascular disease, diabetes mellitus) were collected. Fatigue was evaluated using the Functional Assessment of Chronic Illness Therapy-Fatigue (FACIT-F) questionnaire, with a score ≤43 defined as fatigue. Patients were divided into fatigue and non-fatigue groups, and multivariate regression analysis was used to screen factors associated with fatigue in COPD patients. Results:A total of 597 COPD patients were included, of which 280(46.9%) had fatigue symptoms. Compared with non-fatigue patients, fatigue patients had lower FEV 1%pred, FEV 1/FVC, and body mass index (BMI), higher CAT and mMRC scores, and a higher proportion of occupational exposure, bronchiectasis, and treatment with long-acting β 2-agonists (LABA)/long-acting muscarinic antagonists (LAMA)/inhaled corticosteroids (ICS) (all P<0.05). Multivariate regression analysis showed that high CAT score ( OR=2.312, 95% CI: 1.366-3.911), high mMRC score ( OR=1.484, 95% CI: 1.053-2.091), occupational exposure ( OR=1.513, 95% CI: 1.082-2.116), comorbid bronchiectasis ( OR=2.452, 95% CI: 1.102-5.457), low BMI ( OR=0.935, 95% CI: 0.891-0.981), and high CAT-energy score ( OR=1.301, 95% CI: 1.149-1.473) were risk factors for fatigue in COPD patients. The CAT-energy score was highly correlated with the FACIT-F score ( r=0.260, P<0.001), and a CAT-energy score ≥2 could preliminarily screen COPD patients with fatigue. Conclusions:COPD patients with comorbid fatigue have a heavy symptom burden, are more likely to have a history of occupational exposure and bronchiectasis, and the CAT-energy score is of great reference value for screening COPD patients with fatigue.