1.Outpatient Satisfaction Survey and Related Factors Analysis in a Large Tertiary Hospital
Hongjun FANG ; Hao WANG ; Jing LI ; Hongyan YANG ; Sinan GUAN ; Hang LI
Chinese Hospital Management 2025;45(2):40-45
Objective To analyze the satisfaction of medical experience of outpatients in multi-campus of a large tertiary public hospital.Methods From January to March 2024,a questionnaire on outpatient satisfaction was sent to the outpatient department of Peking University First Hospital daily based on the Questionnaire Star platform to analyze the outpatient satisfaction rate and satisfaction score of medical services,and the influencing factors of outpatient satisfaction were explored by logistic regression analysis.Results Among the respondents,64.0%expressed high levels of satisfaction while 26.1%reported being relatively satisfied.Waiting time and consultation time play an important role.The diagnosis,treatment and health education and schedule of follow-up visits may affect the outpatient experience.Outpatient payment,outpatient environment,outpatient perceived complaints and timely resolution of dissatisfaction all could affect outpatient satisfaction.Conclusion The overall satisfaction of outpatients was high,and patient satisfaction of outpatient medical services in multi-campuses was consistent.On the premise of ensuring the quality of medical care,hospitals should actively carry out individualized health education,simplify the medical process,extend the outpatient service,and further improved the sense of gain of outpatients.
2.Visualization Analysis of Research Hotspots and Trends in Field of Tumor Therapy Based on CiteSpace and VOSviewer
Yuhang FANG ; Chuchu ZHANG ; Bailu SUI ; Yan WANG ; Runxi WANG ; Yu CHEN ; Xinhe YUAN ; Hongjun YANG ; Ying ZHANG
Cancer Research on Prevention and Treatment 2025;52(4):297-304
Objective To explore the research hotspots and development trends in the field of cancer treatment in the past decade. Methods The CNKI and Web of Science Core Collection databases were searched for Chinese and English articles related to cancer treatment published over the last 10 years. Bibliometric research methods were employed, including keyword cluster analysis of published literature. Results A total of 45 455 Chinese articles and 866 958 English articles were retrieved. Combining the visualization analysis results and the current research dilemma of tumor treatment revealed that the current research hotspots of tumor treatment domestically and internationally can primarily focus on four key areas. In the realm of targeted therapy, efforts are directed towards the discovery of new drug targets, overcoming resistance to targeted therapy, and the development of monoclonal antibodies and antibody–drug conjugates. In the field of immunotherapy, the emphasis lies in enhancing the response rate to immune checkpoint inhibitors, determining the mechanisms behind resistance to immunotherapy, and improving the safety of treatment. The research in traditional Chinese medicine (TCM) covers evidence-based evaluation studies on TCM treatment, the identification of populations that can gain the most benefit from TCM, and strategies for improving the quality of life. In the area of novel drug development, cutting-edge technologies, such as organoid-based screening for anticancer drugs, synthetic biology, and artificial intelligence, are under investigation. Conclusion New targeted drugs, immune efficacy improvement, multidisciplinary integration, nano-delivery, and TCM innovation are the key research directions in the field of tumor therapy in the future.
3.Untargeted Metabolomics Reveals Mechanism of Modified Sinisan in Ameliorating Anxiety-like Behaviors Induced by Chronic Restraint Stress in Mice
Jie ZHAO ; Zhengyu FANG ; He XIAO ; Na GUO ; Hongwei WU ; Hongjun YANG
Chinese Journal of Experimental Traditional Medical Formulae 2025;31(21):70-79
ObjectiveTo elucidate the potential mechanism of modified Sinisan (MSNS) in alleviating anxiety-like behaviors induced by chronic restraint stress (CRS) in mice at the metabolic level based on serum untargeted metabolomics and identify key metabolites and metabolic pathways regulated by MSNS. MethodsSeventy-two male C57BL/6 mice were randomly assigned into six groups: control, model, high-dose (2.4 g·kg-1) MSNS, medium-dose (1.2 g·kg-1) MSNS, low-dose (0.6 g·kg-1) MSNS, and positive control (fluoxetine, 2.6 mg·kg-1). Except the control group, the other groups were subjected to CRS for the modeling of anxiety. Mice were administrated with corresponding agents by gavage 2 h before daily restraint for 14 days. Anxiety-like behaviors were evaluated by the open field test (OFT), elevated plus maze (EPM) test, and light/dark box (LDB) test. Serum levels of corticotropin-releasing hormone (CRH), adrenocorticotrophic hormone (ACTH), and corticosterone (CORT) were measured via ELISA to assess stress levels. Ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) was employed to detect 9 metabolites in the brain tissue and serum metabolites. Orthogonal partial least squares-discriminant analysis (OPLS-DA) was adopted to identify differential metabolites (VIP>1.0, P<0.05). MetaboAnalyst 5.0 was used for metabolic pathway enrichment analysis of the differential metabolites. ResultsCompared with the control group, the model group showed reductions in the central activity time and central distance in the OFT (P<0.05), the proportions of open-arm residence time and open-arm residence times in the EPM test (P<0.01), and the proportions of open box activity time and open box activity distance in the LDB test (P<0.05), which were increased in the medium- and high-dose MSNS groups compared with the model group (P<0.05). Compared with the control group, the model group showed elevated levels of CRH, ACTH, and CORT in the serum (P<0.01), and the elevations were diminished in the medium- and high-dose MSNS groups (P<0.05). UPLC-MS results indicated that compared with the control group, the model group presented declined DA, GABA, 5-HIAA, 5-HT, and 5-HT/Trp levels (P<0.05, P<0.01) and raised Glu, NE, Kyn, and Kyn/Trp levels (P<0.05). Compared with the model group, high-dose MSNS increased the GABA, 5-HIAA, and 5-HT/Trp levels (P<0.05) and lowered the Glu and Kyn/Trp levels (P<0.05). Untargeted metabolomics identified that 16 CRS-induced metabolic disturbances were reversed by MSNS. KEGG pathway analysis indicated that MSNS primarily modulated eight core pathways including alanine/aspartate/glutamate metabolism, butyrate metabolism, arginine-proline metabolism, TCA cycle, unsaturated fatty acid biosynthesis, and tryptophan metabolism. The mechanisms involved multidimensional biological processes, including neurotransmitter homeostasis regulation, TCA cycle energy metabolism optimization, and inflammatory response suppression. ConclusionMSNS alleviates CRS-induced anxiety-like behaviors in mice by mitigating hypothalamic-pituitary-adrenal axis hyperactivity, improving hippocampal neurotransmitter and tryptophan metabolic pathways, and regulating alanine/aspartate/glutamate metabolism, butyrate metabolism, arginine-proline metabolism, and TCA cycle.
4.Untargeted Metabolomics Reveals Mechanism of Modified Sinisan in Ameliorating Anxiety-like Behaviors Induced by Chronic Restraint Stress in Mice
Jie ZHAO ; Zhengyu FANG ; He XIAO ; Na GUO ; Hongwei WU ; Hongjun YANG
Chinese Journal of Experimental Traditional Medical Formulae 2025;31(21):70-79
ObjectiveTo elucidate the potential mechanism of modified Sinisan (MSNS) in alleviating anxiety-like behaviors induced by chronic restraint stress (CRS) in mice at the metabolic level based on serum untargeted metabolomics and identify key metabolites and metabolic pathways regulated by MSNS. MethodsSeventy-two male C57BL/6 mice were randomly assigned into six groups: control, model, high-dose (2.4 g·kg-1) MSNS, medium-dose (1.2 g·kg-1) MSNS, low-dose (0.6 g·kg-1) MSNS, and positive control (fluoxetine, 2.6 mg·kg-1). Except the control group, the other groups were subjected to CRS for the modeling of anxiety. Mice were administrated with corresponding agents by gavage 2 h before daily restraint for 14 days. Anxiety-like behaviors were evaluated by the open field test (OFT), elevated plus maze (EPM) test, and light/dark box (LDB) test. Serum levels of corticotropin-releasing hormone (CRH), adrenocorticotrophic hormone (ACTH), and corticosterone (CORT) were measured via ELISA to assess stress levels. Ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) was employed to detect 9 metabolites in the brain tissue and serum metabolites. Orthogonal partial least squares-discriminant analysis (OPLS-DA) was adopted to identify differential metabolites (VIP>1.0, P<0.05). MetaboAnalyst 5.0 was used for metabolic pathway enrichment analysis of the differential metabolites. ResultsCompared with the control group, the model group showed reductions in the central activity time and central distance in the OFT (P<0.05), the proportions of open-arm residence time and open-arm residence times in the EPM test (P<0.01), and the proportions of open box activity time and open box activity distance in the LDB test (P<0.05), which were increased in the medium- and high-dose MSNS groups compared with the model group (P<0.05). Compared with the control group, the model group showed elevated levels of CRH, ACTH, and CORT in the serum (P<0.01), and the elevations were diminished in the medium- and high-dose MSNS groups (P<0.05). UPLC-MS results indicated that compared with the control group, the model group presented declined DA, GABA, 5-HIAA, 5-HT, and 5-HT/Trp levels (P<0.05, P<0.01) and raised Glu, NE, Kyn, and Kyn/Trp levels (P<0.05). Compared with the model group, high-dose MSNS increased the GABA, 5-HIAA, and 5-HT/Trp levels (P<0.05) and lowered the Glu and Kyn/Trp levels (P<0.05). Untargeted metabolomics identified that 16 CRS-induced metabolic disturbances were reversed by MSNS. KEGG pathway analysis indicated that MSNS primarily modulated eight core pathways including alanine/aspartate/glutamate metabolism, butyrate metabolism, arginine-proline metabolism, TCA cycle, unsaturated fatty acid biosynthesis, and tryptophan metabolism. The mechanisms involved multidimensional biological processes, including neurotransmitter homeostasis regulation, TCA cycle energy metabolism optimization, and inflammatory response suppression. ConclusionMSNS alleviates CRS-induced anxiety-like behaviors in mice by mitigating hypothalamic-pituitary-adrenal axis hyperactivity, improving hippocampal neurotransmitter and tryptophan metabolic pathways, and regulating alanine/aspartate/glutamate metabolism, butyrate metabolism, arginine-proline metabolism, and TCA cycle.
5.Celecoxib improves right heart function in mice after acute high-altitude hypoxia exposure by increasing 12,13-diHOME level
Wei ZHANG ; Xinyu BAO ; Xiaoyue LAI ; Xiaoqin WAN ; Yan TAN ; Hongjun YIN ; Xiaoshi CAI ; Dingyuan TIAN ; Ziyang WANG ; Pan ZHENG ; Fang DENG ; Zhihui ZHANG
Journal of Army Medical University 2025;47(19):2289-2301
Objective To investigate the effect and mechanisms of celecoxib on right heart function in mice with acute high-altitude hypoxia exposure.Methods Male C57BL/6J mice(7 weeks old)were housed in a hypobaric chamber simulating an altitude of 5 800 m for 2 d to establish an animal model of acute hypobaric hypoxia.①Eighteen mice were randomly assigned to plain+saline(P+S),high-altitude hypoxia exposure+saline(H+S),and high-altitude hypoxia exposure+celecoxib(H+Cel).Body weight and routine blood indicators were measured,and cardiac ultrasound examination were performed for heart rate(HR),pulmonary artery acceleration time to ejection time ratio(AT/ET),tricuspid annular plane systolic excursion(TAPSE),tricuspid annular systolic velocity(S'),and left ventricular ejection fraction(LVEF)and fractional shortening(FS).Targeted metabolomic profiling was applied to detect the cardiac arachidonic acid(AA)metabolite levels.The contents of 12,13-dihydroxy-9Z-octadecenoic acid(12,13-diHOME)in the heart,liver,brown adipose tissue,and plasma were quantified by ELISA.② Eighteen mice were randomly assigned into plain+saline(P+S),high-altitude hypoxia exposure+saline(H+S)and high-altitude hypoxia exposure+12,13-diHOME(H+di)groups.Body weight,routine blood tests,and echocardiography were performed as above.③ Thirty-two mice were randomly divided into high-altitude hypoxia exposure+saline(H+S),high-altitude hypoxia exposure+celecoxib(H+Cel),high-altitude hypoxia exposure+soluble epoxide hydrolase inhibitor(sEHI)(H+sEHI),and high-altitude hypoxia exposure+sEHI+celecoxib(H+sEHI+Cel)groups.Body weight,routine blood tests,and echocardiography were performed as above.Cardiac and plasma contents of 12,13-diHOME and epoxyeicosatrienoic acids(EETs)were measured by ELISA.Results ① Compared to the P+S group,the H+S group exhibited significantly reduction of cardiac 12,13-diHOME level(P<0.001),increased counts of white blood cells(WBC)and neutrophils(P<0.01)and decreased TAPSE,S'and AT/ET both at resting state and under stress(P<0.01,P<0.001).Compared to the H+S group,the H+Cel group exhibited significantly increase of cardiac 12,13-diHOME level(P<0.05),reduced WBC and lymphocyte counts(P<0.01,P<0.05)and improved TAPSE and S'levels at resting state and under stress(P<0.01,P<0.001).② Compared to the H+S group,the H+di group demonstrated significantly improvement of TAPSE at basal and under stress(P<0.001)and a trend towards improved TAPSE at resting state(P=0.0532),but no obvious differences was observed in WBC and neutrophil counts between the H+di group and the H+S group.③ Compared to the H+Cel group,both the H+sEHI and H+sEHI+Cel groups exhibited significantly reduction of cardiac 12,13-diHOME level(P<0.01,P<0.05)though no statistical changes in cardiac function indicators.Compared to the H+S group,WBC counts and lymphocyte were decreased,and serum EETs level was incrased in the H+Cel group,H+sEHI group and H+sEHI+Cel group(P<0.01,P<0.001).Conclusion Celecoxib can elevate cardiac level of 12,13-diHOME and improves right heart function in mice after acute high-altitude hypoxia exposure through the CYP450-sEH metabolic pathway.
6.Incidence, risk factors, and outcomes of falls among elderly in Beijing communities
Chunxiu WANG ; Shaochen GUAN ; Huihui LI ; Hongjun LIU ; Shimin HU ; Xiaoguang WU ; Yan ZHAO ; Chunxiao LIU ; Xujing BAI ; Xianghua FANG
Chinese Journal of Epidemiology 2025;46(6):994-1002
Objective:To investigate the incidence, risk factors, and outcomes of falls among the elderly community population in Beijing.Methods:A cross-sectional survey was conducted using stratified multistage random sampling to select urban and rural residents aged 65 years and older in Beijing. Mortality data was collected after the baseline survey for 5 years. The incidence of falls was weighted based on the composition ratios of age and gender from the 2010 Nation-wide Population Census of Beijing. A logistic regression model was used to analyze the impacts of demographic sociology of common chronic diseases on fall occurrence. The Cox proportional hazards regression model was used to analyze the fall and 5-year survival association.Results:A total of 2 968 participants completed the questionnaire, at cross-sectional survey, with an average age of (73.2±6.0) years, and 1 581 (53.8%) participants were female. Three hundred and sixty-one individuals experienced a fall within the past year. Among those who fell, 64 (17.7%) fell twice, and 95 (26.6%) fell three or more times. Of them, 14.4% (52) had post-fall fractures, with the wrist, knee, and hip being the most common fracture sites, accounting for 25.0%, 17.3%, and 15.4%, respectively. The weighted fall incidence was 12.4% (95% CI: 11.2%-13.5%). Aging, being female, and living in rural areas were more likely to fall. Logistic regression analysis showed that after adjusting for age, gender, and urban-rural status, the risk of falls for those living alone ( OR=1.48, 95% CI: 1.08-2.04) or living with children/grandchildren ( OR=1.51, 95% CI: 1.15-1.97) were significantly higher than those living with their spouse. In addition, the risk of falls was elevated significantly among the elderly with hypertension, diabetes, stroke, dementia, depression status, urinary incontinence, arthritis, insomnia, vision, and hearing loss, dependence on activities of daily living (ADL), general and poor self-rated health (SRH). The Cox proportional hazard regression model revealed that the 5-year risk of death increased by 65% ( HR=1.65, 95% CI: 1.29-2.11) for those who experienced a fall, which increased with fall frequency. This elevated risk persisted after adjusting for chronic conditions, ADL, and SRH. Conclusions:Ageing, female, living in rural regions, having common chronic diseases, dependence on ADL, general and poor SRH, living alone or living with children/grandchildren were associated with the elevated fall risk. The occurrence of fall was seasonal. The most common short-term adverse consequence after a fall was fractures, while the long-term effect was an increased risk of death.
7.Incidence, risk factors, and outcomes of falls among elderly in Beijing communities
Chunxiu WANG ; Shaochen GUAN ; Huihui LI ; Hongjun LIU ; Shimin HU ; Xiaoguang WU ; Yan ZHAO ; Chunxiao LIU ; Xujing BAI ; Xianghua FANG
Chinese Journal of Epidemiology 2025;46(6):994-1002
Objective:To investigate the incidence, risk factors, and outcomes of falls among the elderly community population in Beijing.Methods:A cross-sectional survey was conducted using stratified multistage random sampling to select urban and rural residents aged 65 years and older in Beijing. Mortality data was collected after the baseline survey for 5 years. The incidence of falls was weighted based on the composition ratios of age and gender from the 2010 Nation-wide Population Census of Beijing. A logistic regression model was used to analyze the impacts of demographic sociology of common chronic diseases on fall occurrence. The Cox proportional hazards regression model was used to analyze the fall and 5-year survival association.Results:A total of 2 968 participants completed the questionnaire, at cross-sectional survey, with an average age of (73.2±6.0) years, and 1 581 (53.8%) participants were female. Three hundred and sixty-one individuals experienced a fall within the past year. Among those who fell, 64 (17.7%) fell twice, and 95 (26.6%) fell three or more times. Of them, 14.4% (52) had post-fall fractures, with the wrist, knee, and hip being the most common fracture sites, accounting for 25.0%, 17.3%, and 15.4%, respectively. The weighted fall incidence was 12.4% (95% CI: 11.2%-13.5%). Aging, being female, and living in rural areas were more likely to fall. Logistic regression analysis showed that after adjusting for age, gender, and urban-rural status, the risk of falls for those living alone ( OR=1.48, 95% CI: 1.08-2.04) or living with children/grandchildren ( OR=1.51, 95% CI: 1.15-1.97) were significantly higher than those living with their spouse. In addition, the risk of falls was elevated significantly among the elderly with hypertension, diabetes, stroke, dementia, depression status, urinary incontinence, arthritis, insomnia, vision, and hearing loss, dependence on activities of daily living (ADL), general and poor self-rated health (SRH). The Cox proportional hazard regression model revealed that the 5-year risk of death increased by 65% ( HR=1.65, 95% CI: 1.29-2.11) for those who experienced a fall, which increased with fall frequency. This elevated risk persisted after adjusting for chronic conditions, ADL, and SRH. Conclusions:Ageing, female, living in rural regions, having common chronic diseases, dependence on ADL, general and poor SRH, living alone or living with children/grandchildren were associated with the elevated fall risk. The occurrence of fall was seasonal. The most common short-term adverse consequence after a fall was fractures, while the long-term effect was an increased risk of death.
8.Outpatient Satisfaction Survey and Related Factors Analysis in a Large Tertiary Hospital
Hongjun FANG ; Hao WANG ; Jing LI ; Hongyan YANG ; Sinan GUAN ; Hang LI
Chinese Hospital Management 2025;45(2):40-45
Objective To analyze the satisfaction of medical experience of outpatients in multi-campus of a large tertiary public hospital.Methods From January to March 2024,a questionnaire on outpatient satisfaction was sent to the outpatient department of Peking University First Hospital daily based on the Questionnaire Star platform to analyze the outpatient satisfaction rate and satisfaction score of medical services,and the influencing factors of outpatient satisfaction were explored by logistic regression analysis.Results Among the respondents,64.0%expressed high levels of satisfaction while 26.1%reported being relatively satisfied.Waiting time and consultation time play an important role.The diagnosis,treatment and health education and schedule of follow-up visits may affect the outpatient experience.Outpatient payment,outpatient environment,outpatient perceived complaints and timely resolution of dissatisfaction all could affect outpatient satisfaction.Conclusion The overall satisfaction of outpatients was high,and patient satisfaction of outpatient medical services in multi-campuses was consistent.On the premise of ensuring the quality of medical care,hospitals should actively carry out individualized health education,simplify the medical process,extend the outpatient service,and further improved the sense of gain of outpatients.
9.Prevalence and 5-year mortality of dementia and association with geriatric syndromes in elderly population in Beijing
Shimin HU ; Fang LI ; Shaochen GUAN ; Chunxiu WANG ; Xiaowei SONG ; Hongjun LIU ; Jinghong MA ; Yan ZHAO ; Chunxiao LIU ; Huihui LI ; Yanlei ZHANG ; Jian WU ; Xianghua FANG
Chinese Journal of Epidemiology 2024;45(11):1573-1581
Objective:To investigate the prevalence and mortality of dementia and assess the impact of geriatric syndromes (GS) on the risk for dementia and death in elderly population in Beijing.Methods:A cross-sectional survey was conducted in the elderly population aged ≥65 years and selected by a multi-stage sampling in Beijing during 2013-2015. Cognitive function was screened using the Chinese Revised Version of the Mini-Mental State Examination (MMSE). Then, neurological examination and psychiatric assessment were performed for those with the MMSE score lower than the cut-off value. The information about GS prevalence was also collected. The study also collected death records for all individuals from baseline until December 31, 2019. Based on the age and gender distribution from Beijing data of the 2010 Six th National Population Census, the dementia prevalence in the study population was directly standardized. Logistic regression analysis was used to evaluate the association of different forms of dementia with GS, and Cox proportional hazards regression model was used to estimate the hazard ratio ( HR) and 95% CI of death. Results:During 2013-2015, a total of 2 935 individuals completed dementia assessments, of which 167 were diagnosed with dementia. The standardized prevalence of dementia was 5.9% (95% CI: 5.0%-17.4%). The individuals with Alzheimer's disease (AD) and vascular dementia (VaD) accounted for 58.7% and 28.1% of total individuals with dementia, respectively. Aging, lower education level, urinary incontinence, and fall were risk factors for AD, while disability of activity of daily life dependence, hypertension, and stroke were found to be risk factors for VaD. After a median follow-up of 5.44 person-years, 399 deaths were recorded. The 5-year mortality risk was 2.87 (95% CI: 1.92-4.17) times and 4.93 (95% CI: 3.23-7.53) times higher for the elderly individuals with AD and VaD, respectively, compared to non-demented individuals. After adjusting for demographic, GS, and cardiovascular risk factors, the mortality risk in the elderly individuals with AD showed no significant difference compared with non-demented individuals ( HR=1.32, 95% CI: 0.89-1.97), while the mortality risk in those with VaD was 2.46 (95% CI: 1.49-4.05) times higher than that in non-demented individuals. Conclusions:The prevalence of dementia in Beijing increased significantly in the context of population aging, especially the prevalence of AD. The presence of GS increased the risks for AD and VaD, as well as the risk for death. Close attention needs to be paid to GS management in dementia prevention in elderly population.
10.The role and regulatory mechanism of RNA binding protein ZFP36in hypoxia/reoxygenation injury of cardiomyocytes
Guo LÜ ; Chaofeng SUN ; Hao ZHANG ; Hongjun LI ; Fang WANG
Journal of Xi'an Jiaotong University(Medical Sciences) 2024;45(2):219-227
【Objective】 To explore the role of ZFP36 in cardiomyocyte injury and autophagy induced by hypoxia/reoxygenation (H/R) so as to clarify its molecular regulatory mechanism. 【Methods】 H9C2 rat cardiomyocytes were infected with ZFP36 overexpressing lentivirus (OE-ZFP36) or its negative control lentivirus (OE-ZFP36 NC) to construct stable cell lines, respectively. Transfection of ATG4D overexpression plasmid (OE-ATG4D) improved the expression of ATG4D. Hypoxia/reoxygenation (H/R) induced myocardial cell injury. H9C2 cells were mainly divided into control group, H/R group, OE-ZFP36 NC+H/R group, OE-ZFP36+H/R group, OE-ATG4D NC+H/R group, OE-ATG4D+H/R group, OE-ZFP36+OE-ATG4D NC+H/R group, and OE-ZFP36+OE-ATG4D+H/R group. The protein expressions of ATG4D, Beclin1, LC3 and ZFP36 in H9C2 cells were detected by Western blotting. The mRNA levels of ZFP36 and ATG4D in H9C2 cells were detected by Real-time fluorescence quantitative PCR (qPCR). The viability of H9C2 cells was detected by CCK-8 assay. The levels of interleukin (IL-6) and tumor necrosis factor (TNF-α) in H9C2 cells were detected by enzyme-linked immunosorbent assay (ELISA). Reactive oxygen species (ROS) in H9C2 cells were detected by DCFH-DA method. SOD detection kit was used to detect the SOD level in H9C2 cells. The apoptosis of H9C2 cells was detected by flow cytometry. LC3 autophagosomes in H9C2 cells were detected by cellular immunofluorescence. Dual-luciferase reporter gene assay was used to detect the binding of ZFP36 and ATG4D mRNA in H9C2 cells. 【Results】 Compared with control group, H/R group showed decreased cell viability, increased IL-6 and TNF-α levels, increased ROS levels and decreased SOD levels, increased cell apoptosis. Up-regulated ATG4D and Beclin1 protein expression, increased LC3Ⅱ/LC3Ⅰ ratio, as well as upregulated ZFP36 expression were found in H/R group (all P<0.05). Compared with OE-ZFP36 NC+H/R group, elevated cell viability, decreased IL-6 and TNF-α levels, decreased ROS levels and increased SOD levels, reduced cell apoptosis (P<0.05), and downregulated ATG4D and Beclin1 protein expression, decreased LC3Ⅱ/LC3Ⅰ ratio were shown in OE-ZFP36+H/R group (all P<0.05). Compared with infection with OE-ZFP36 NC lentivirus, infection with OE-ZFP36 lentivirus decreased the luciferase activity of ATG4D 3′-UTR reporter gene, decreased the stability of ATG4D mRNA, and downregulated the H/R-induced ATG4D mRNA expression (all P<0.05). Compared with OE-ATG4D NC+H/R group, OE-ATG4D+H/R group had upregulated ATG4D mRNA and protein expression, decreased cell viability, increased IL-6 and TNF-α levels, increased ROS levels, decreased SOD levels and elevated cell apoptosis (all P<0.05). Compared with OE-ZFP36+OE-ATG4D NC+H/R group, OE-ZFP36+OE-ATG4D+H/R group had decreased cell viability, increased IL-6 and TNF-α levels, increased ROS levels, decreased SOD levels and elevated cell apoptosis (all P<0.05). 【Conclusion】 The expression of ZFP36 is upregulated in H/R-induced cardiomyocyte injury. The overexpression of ZFP36 inhibits H/R-induced cardiomyocyte injury and autophagy by regulating ATG4D, thus resisting cardiomyocyte H/R injury. It proves that ZFP36 is an important regulatory molecule against MI/RI.

Result Analysis
Print
Save
E-mail