Objective To investigate the regulatory effects and molecular mechanisms of extracellular vesicles(EVs)secreted by adri-amycin(ADR)-resistant breast cancer cells on vascular endothelial cells related to tumor microenvironment.Methods The ADR-sen-sitive breast cancer cell line(MCF-7)and its ADR-resistant counterpart(MCF-7-ADR)were established in vitro.Then,the EVs were isolated from the supernatant of cell culture using a commercial kit.The fluorescence labeling and tracking technology using PKH67 was used to validate the internalization of EVs by human umbilical vein endothelial cell(HUVEC).The effects of EVs on the proliferation,migration,and angiogenesis of HUVEC were assessed by the colony formation,scratch wound healing,and tube formation assays,re-spectively.The expression level of CD31 protein was detected by Western blot,and the levels of vascular endothelial growth factor(VEGF)in cell supernatant were determined by ELISA.The microRNA(miRNA)sequencing technology was utilized to identify the differentially expressed miRNAs in EVs secreted by ADR-resistant cells.Results Compared with the ADR-sensitive strain,the EVs secreted by the ADR-resistant strain significantly enhanced the proliferation(colony number increased by 38.7%,P=0.011),migra-tion(scratch healing rate improved by 42.3%,P=0.004),and tube formation ability(tube formation rates increased by 1.8 times and 2.3 times at 4 h and 16 h,respectively,P=0.044 and 0.010)of HUVEC.Western blot analysis showed that the expression level of CD31 in the EVs secreted by the ADR-resistant strain increased by 1.85 times compared with the ADR-sensitive strain(P=0.039).The results of ELISA showed that the expression level of VEGF increased by 2.12 times(P=0.012).The miRNA sequencing identified a differentially expressed miRNA profile.Conclusion The ADR-resistant breast cancer cells significantly enhance the proliferation,migration,and angiogenesis of vascular endothelial cells by secreting EVs rich in specific miRNA,and its mechanism may be related to the up-regulation of CD31/VEGF protein levels mediated by EVs,suggesting that the drug-resistant cells reshaping the tumor vascular microenvironment through EVs may become a new therapeutic target of chemotherapy resistance in breast cancer.

BackgroundAttention deficit hyperactivity disorder （ADHD） is a neurodevelopmental disorder characterized by age-inappropriate inattention， excessive activities incongruous with setting， and emotional impulsivity. Subthreshold ADHD （sADHD） is clinically defined as the presence of ADHD symptoms that do not meet the full diagnostic criteria for ADHD. Children with sADHD exhibit deficits in executive function， demonstrate more conduct， learning， and anxiety-related problems compared to typically developing children， and show even poorer working memory performance than children diagnosed with ADHD. Currently， there is limited epidemiological research on sADHD in China， with few studies simultaneously investigating the prevalence of both ADHD and sADHD in children. ObjectiveTo investigate the prevalence of ADHD and sADHD among children aged 6–13 years in Chongqing， analyzing their distribution characteristics within this population， with the aim of providing references for developing preventive measures against both ADHD and sADHD. MethodsFrom October to November 2023， a total of 3 398 students in grades 1–6 from six primary schools in Jiangbei District， Chongqing were selected using a stratified cluster random sampling method. The occurrence of ADHD and sADHD was evaluated by using the short version （18-item version） of the Swanson， Nolan， and Pelham IV rating scales （SNAP-IV） and the Chinese vision of Schedule for Affective Disorder and Schizophrenia for School-aged Children-Present and Lifetime Version （K-SADS-PL）. ResultsThe ADHD detection rate among children in Chongqing was 1.90% （95% CI： 0.014–0.024）. Boys showed a significantly higher ADHD detection rate than girls （χ²=7.733， P=0.005）. No statistically significant differences were found in ADHD detection rates across different grades or age groups （χ²=7.347， 12.362， P>0.05）. The sADHD detection rate was 6.32% （95% CI： 0.054–0.072）. Similarly， boys exhibited significantly higher sADHD detection rates than girls （χ²=21.005， P<0.01）. Significant differences emerged across different grades （χ²=20.559， P=0.001）， while no statistically significant difference was observed in age groups （χ²=12.070， P=0.060）. ConclusionThe ADHD detection rates were comparable across all grade levels and age groups from 6–13 years old. Second-grade children demonstrated notably higher sADHD rates compared to other grades， while boys demonstrated higher prevalence rates than girls for both ADHD and sADHD. ［Funded by Science and Health Joint Medical Research Project in Jiangbei District， Chongqing City in the Second Half of 2023 （number， 2023JBKWLH022）］

Objective To systematically evaluate and integrate qualitative studies on perception of exercise behaviors in community-dwelling older adults with frailty,and to provide references for clinical development of targeted exercise intervention strategies.Methods A systematic search of PubMed,Medline,Embase,PsycINFO,the Cochrane Library,SinoMed,Wanfang Database,CNKI,and VIP Database for qualitative studies on perception of exercise behaviors in older adults with frailty in the community was conducted from the inception of the databases to June 2024.Literature quality was evaluated using the Australian Joanna Briggs Institute Centre for Evidence-Based Health Care Quality Assessment Criteria for Qualitative Research(2016 edition),and Meta-synthesis was performed using the theme synthesis method.Results A total of 10 papers were included,grouped into 10 categories and integrated into the 3 domains of the capability,opportunity,and motivation-behavior model(COM-B model),i.e.Preparation for exercise behavior is influenced by capability factors(physical reserve,knowledge reserve,psychological preparation);stage-specific motivational evolution promotes the internalization of exercise behavior(guiding,focusing,stimulating,and maintaining);external conditions provide opportunities for exercise behavior(individual interaction,community environment,and social support).Conclusion Perceptions of exercise behavior among community-dwelling older adults with frailty or are complex and influenced by a variety of factors.Future exercise intervention strategies should consider modifiable factors,enhance knowledge education,stimulate intrinsic motivation,and solidify external conditions,while also accommodating individual differences and preferences,so as to promote exercise participation and health enhancement in this group.

Objective To systematically evaluate and integrate qualitative studies on perception of exercise behaviors in community-dwelling older adults with frailty,and to provide references for clinical development of targeted exercise intervention strategies.Methods A systematic search of PubMed,Medline,Embase,PsycINFO,the Cochrane Library,SinoMed,Wanfang Database,CNKI,and VIP Database for qualitative studies on perception of exercise behaviors in older adults with frailty in the community was conducted from the inception of the databases to June 2024.Literature quality was evaluated using the Australian Joanna Briggs Institute Centre for Evidence-Based Health Care Quality Assessment Criteria for Qualitative Research(2016 edition),and Meta-synthesis was performed using the theme synthesis method.Results A total of 10 papers were included,grouped into 10 categories and integrated into the 3 domains of the capability,opportunity,and motivation-behavior model(COM-B model),i.e.Preparation for exercise behavior is influenced by capability factors(physical reserve,knowledge reserve,psychological preparation);stage-specific motivational evolution promotes the internalization of exercise behavior(guiding,focusing,stimulating,and maintaining);external conditions provide opportunities for exercise behavior(individual interaction,community environment,and social support).Conclusion Perceptions of exercise behavior among community-dwelling older adults with frailty or are complex and influenced by a variety of factors.Future exercise intervention strategies should consider modifiable factors,enhance knowledge education,stimulate intrinsic motivation,and solidify external conditions,while also accommodating individual differences and preferences,so as to promote exercise participation and health enhancement in this group.

Objective To investigate the regulatory effects and molecular mechanisms of extracellular vesicles(EVs)secreted by adri-amycin(ADR)-resistant breast cancer cells on vascular endothelial cells related to tumor microenvironment.Methods The ADR-sen-sitive breast cancer cell line(MCF-7)and its ADR-resistant counterpart(MCF-7-ADR)were established in vitro.Then,the EVs were isolated from the supernatant of cell culture using a commercial kit.The fluorescence labeling and tracking technology using PKH67 was used to validate the internalization of EVs by human umbilical vein endothelial cell(HUVEC).The effects of EVs on the proliferation,migration,and angiogenesis of HUVEC were assessed by the colony formation,scratch wound healing,and tube formation assays,re-spectively.The expression level of CD31 protein was detected by Western blot,and the levels of vascular endothelial growth factor(VEGF)in cell supernatant were determined by ELISA.The microRNA(miRNA)sequencing technology was utilized to identify the differentially expressed miRNAs in EVs secreted by ADR-resistant cells.Results Compared with the ADR-sensitive strain,the EVs secreted by the ADR-resistant strain significantly enhanced the proliferation(colony number increased by 38.7%,P=0.011),migra-tion(scratch healing rate improved by 42.3%,P=0.004),and tube formation ability(tube formation rates increased by 1.8 times and 2.3 times at 4 h and 16 h,respectively,P=0.044 and 0.010)of HUVEC.Western blot analysis showed that the expression level of CD31 in the EVs secreted by the ADR-resistant strain increased by 1.85 times compared with the ADR-sensitive strain(P=0.039).The results of ELISA showed that the expression level of VEGF increased by 2.12 times(P=0.012).The miRNA sequencing identified a differentially expressed miRNA profile.Conclusion The ADR-resistant breast cancer cells significantly enhance the proliferation,migration,and angiogenesis of vascular endothelial cells by secreting EVs rich in specific miRNA,and its mechanism may be related to the up-regulation of CD31/VEGF protein levels mediated by EVs,suggesting that the drug-resistant cells reshaping the tumor vascular microenvironment through EVs may become a new therapeutic target of chemotherapy resistance in breast cancer.

AIM: To assess the association between the Dem, axial length/corneal radius ratio(AL/CR ratio), and the refractive status of children aged 3 to 14, compare the efficiency of Dem with AL/CR ratio in predicting myopia, and to explore a more effective method for quantitatively predicting the refractive state of children.METHODS: This cross-sectional study involved 519 children aged 3 to 14, including 519 eyes(data from the right eyes were used). All participants were out-patients at the ophthalmic clinic of Xi'an No.1 Hospital from March 2021 to December 2022. The axial length(AL), keratometry(K), Dem, and spherical equivalent refraction(SER)were recorded before ciliary paralysis, and myopia was defined when the SER ≤-0.50 D.RESULTS: There was a positive correlation between SER and Dem(r=0.88, P<0.01), and a negative correlation between SER and the AL/CR ratio(r=-0.87, P<0.01)in children aged 3-14. The optimal cutoff points for the Dem and AL/CR ratio were 20.40 D, and 3.02, respectively. Myopia could be diagnosed when the Dem ≤20.40 D or the AL/CR ratio ≥3.02. SER decreased by 0.57 D for every 1 D decrease in Dem and by 1.00 D for every 0.06 increase in the AL/CR ratio. The area under the ROC curve(AUC)for Dem(0.958)was significantly greater than that for the AL/CR ratio(0.940).CONCLUSION: There is a positive correlation between SER and Dem, and a negative correlation between SER and the AL/CR ratio in children aged 3-14. Dem is more efficient than the AL/CR ratio in myopia assessment. The eye biometrics directly provide Dem values, which is more convenient for calculating the dose-effect relationship with SER, thus making it more efficient for predicting SER in children.

Objective:To detect the changes in the levels of miR-21-5p and miR-125a-5p modified with 3′-terminal 2′-O-methylation (3′t-2′Ome) in serum extracellular vesicles (EV) of non-small cell lung cancer (NSCLC) patients, and evaluate their value as auxiliary screening molecular markers for NSCLC patients.Method:A retrospective analysis was conducted on the data of 69 NSCLC patients diagnosed at the Eastern Theater Command General Hospital from May 1st to October 31st,2023, as well as 65 age and gender matched healthy controls during the same period. Two real-time fluorescence quantitative PCR (RT-qPCR) techniques, namely stem-loop method and poly (A) tailed method, were used to detect the levels of 3′t-2′Ome-miR-21-5p and 3′t-2′-Ome miR-125a-5p in serum EV of NSCLC patients and controls.Analyze the correlation between the levels of two types of 3′t-2 ′Ome miRNAs and the differences in clinical stage, pathological classification, and other tumor indicators in patients. Receiver operating characteristic (receiveroperating curve, ROC) curves were used to analyze the efficacy of 3′t-2 ′Ome miR-21-5p and 3′t-2′ Ome miR-125a-5p in serum EV, as well as their combination, in diagnosing NSCLC.Result:Compared with the control group, the levels of 3′t-2′Ome-miR-21-5p in serum EV of NSCLC patients increased [(0.30±0.05) vs (0.35±0.09), t=3.32, P=0.001], while the levels of 3′t-2′Ome-miR-125a-5p decreased [(0.33±0.06 vs 0.25±0.06, t=7.45, P<0.001]. The differences were statistically significant. The expression levels of 2′Ome-miR-21-5p in EV were also significantly elevated in the NSCLC patients at 0-Ⅱ stage, adenocarcinoma patients, and squamous cell carcinoma patients, respectively. Notably, the levels of EV 3′t-2′Ome-miR-21-5p was also statistically significant between the adenocarcinoma patients and squamous cell carcinoma patients [(0.34±0.85) vs (0.40±0.12), P<0.05]. ROC curve analysis showed that the levels of 3′t-2 ′Ome miR-21-5p and 3′t-2′ Ome miR-125a-5p in serum EV, as well as their combined AUC for discriminating NSCLC patients, were 0.647(95% CI 0.550-0.743), 0.825(95% CI 0.756-0.894) and 0.860(95% CI 0.797-0.923), respectively. The sensitivity was 92.3%, 80.0%, 89.2%, and the specificity was 46.4%, 73.9%, and 78.3%, respectively. Conclusion:There are changes in the levels of 2 ′Ome miR-21-5p and 2′ Ome miR-125a-5p in the serum EV of NSCLC patients, and the combined detaction has the potential as an auxiliary screening molecular marker of NSCLC patients.

Objective To retrieve,evaluate and summarize the related evidences on non-pharmacological management of sarcopenia in community-dwelling older adults to provide an evidence-based basis for formula-ting a scientific and effective health management program for sarcopenia in older adults.Methods According to the"6S"evidence resource pyramid model,the UpToDate,JBI Center for Evidence-based Health Care,Co-chrane Library,DynaMed,Guidelines International Network,Registered Nurses'Association of Ontario,Med-Sci,Yimaitong,PubMed,CINAHL,Web of Science,CNKI,Wanfang,and CBM for evidence related to the non-pharmacological management of sarcopenia in older adults.The retrival time was from January 1,2018 to No-vember 1,2023.Results A total of 20 literatures were included,including 1 clinical decision,2 guidelines,7 expert consensuses and 10 systematic evaluations or meta analysis.Forty-two pieces of evidence were summa-rized in 4 aspects including screening and assessment,dietary and nutritional management,exercise guidance and health education,in which there were 25 recommendations for the level A and 17 recommendations for Level B.Conclusion Medical staff should select the best evidence by combining with the actual situation,medical conditions and individual factors of the patients,and guide elderly patients with sarcopenia to improve their lifestyle and quality of life safely and effectively.

Objective To explore the potential value of coagulation indicators and their combinations for metastasis and postoperative recurrence in renal cell carcinoma(RCC)patients.Methods A total of 39 RCC patients with metastasis and postoperative recurrence were enrolled,and the controls groups included 64 RCC patients without metastasis,15 patients with renal vascular leiomyoma/oncocy-toma and 118 patients with renal cysts.All the patients were diagnosed and hospitalized in the Department of Urology of Nanjing Hospi-tal of Chinese Medicine affiliated with Nanjing University of Chinese Medicine and Jinling Hospital affiliated with Nanjing University School of Medicine from January 2018 to June 2024.The coagulation indicators in the blood samples were measured.The levels of plas-ma prothrombin time(PT),activated partial thromboplastin time(APTT),thrombin time(TT)and fibrinogen(Fib)were analyzed by clotting method.The levels of fibrinogen degradation products(FDP)and D-Dimer(DD)were analyzed by immunological turbidim-etry assay,and the levels of antithrombin Ⅲ(AT3)were analyzed by chromogenic substrate method,respectively.The differences of coagulation indicators between RCC patients with metastasis and postoperative recurrence and the controls were assessed by Mann-Whit-ney U test.The potential value of coagulation indicators and their combinations for predicating metastasis and postoperative recurrence in RCC patients was evaluated through Logistic regression and ROC curve analysis.Results The plasma levels of the seven coagulation indicators showed significant differences between the patients with RCC metastatic/recurrent and the controls(all with P＜0.05).The results of ROC curve analysis showed that the plasma levels of all the 7 coagulation index could distinguish the metastatic/recurrent RCC patients from the controls,and the DD level showed the highest value with the AUCROC=0.913(95％CI:0.859 to 0.967).Multi-ple logistic regression analysis revealed that the plasma levels of Fib,FDP,DD,and AT3 were associated with RCC metastasis/recur-rence.Logistic regression analysis combined with ROC curve analysis revealed that the panel of Fib,FDP,DD and AT3 had the best performance for discriminating RCC metastasis/recurrence along with the AUCROC of 0.920(95％CI:0.865 to 0.974).Conclusion Alterations of the levels of plasma Fib,DD,FDP and AT3 may be closely related to postoperative recurrence and metastasis in RCC patients,and the panel of Fib,FDP,DD and AT3 has the potential to serve as the monitoring and evaluation indicators for RCC recur-rence and metastasis.

Objective To explore the potential value of coagulation indicators and their combinations for metastasis and postoperative recurrence in renal cell carcinoma(RCC)patients.Methods A total of 39 RCC patients with metastasis and postoperative recurrence were enrolled,and the controls groups included 64 RCC patients without metastasis,15 patients with renal vascular leiomyoma/oncocy-toma and 118 patients with renal cysts.All the patients were diagnosed and hospitalized in the Department of Urology of Nanjing Hospi-tal of Chinese Medicine affiliated with Nanjing University of Chinese Medicine and Jinling Hospital affiliated with Nanjing University School of Medicine from January 2018 to June 2024.The coagulation indicators in the blood samples were measured.The levels of plas-ma prothrombin time(PT),activated partial thromboplastin time(APTT),thrombin time(TT)and fibrinogen(Fib)were analyzed by clotting method.The levels of fibrinogen degradation products(FDP)and D-Dimer(DD)were analyzed by immunological turbidim-etry assay,and the levels of antithrombin Ⅲ(AT3)were analyzed by chromogenic substrate method,respectively.The differences of coagulation indicators between RCC patients with metastasis and postoperative recurrence and the controls were assessed by Mann-Whit-ney U test.The potential value of coagulation indicators and their combinations for predicating metastasis and postoperative recurrence in RCC patients was evaluated through Logistic regression and ROC curve analysis.Results The plasma levels of the seven coagulation indicators showed significant differences between the patients with RCC metastatic/recurrent and the controls(all with P＜0.05).The results of ROC curve analysis showed that the plasma levels of all the 7 coagulation index could distinguish the metastatic/recurrent RCC patients from the controls,and the DD level showed the highest value with the AUCROC=0.913(95％CI:0.859 to 0.967).Multi-ple logistic regression analysis revealed that the plasma levels of Fib,FDP,DD,and AT3 were associated with RCC metastasis/recur-rence.Logistic regression analysis combined with ROC curve analysis revealed that the panel of Fib,FDP,DD and AT3 had the best performance for discriminating RCC metastasis/recurrence along with the AUCROC of 0.920(95％CI:0.865 to 0.974).Conclusion Alterations of the levels of plasma Fib,DD,FDP and AT3 may be closely related to postoperative recurrence and metastasis in RCC patients,and the panel of Fib,FDP,DD and AT3 has the potential to serve as the monitoring and evaluation indicators for RCC recur-rence and metastasis.