BACKGROUND:Intertrochanteric fracture of femur has various fracture types and fixation methods,and the mechanical stability of each fixation system is quite different.It is of scientific clinical significance to use finite element analysis method to carry out biomechanical research on various fixation systems. OBJECTIVE:To compare and analyze the mechanical stability of various internal fixations applied to femoral intertrochanteric fracture A031-A2.1 by finite element method. METHODS:Based on the validated finite element model of femur(Intact),the model was cut and made into A031-A2.1 intertrochanteric fracture of femur.Different internal fixation systems were implanted by simulating clinical operation methods,and fixation models of proximal femoral nail antirotation,dynamic hip screw,percutaneous compression plate and proximal femoral locking plate were established respectively.All nodes under the distal femur of the four groups of models were constrained,and compression loads of 700,1 400 and 2 100 N were applied to the femoral head.Von Mises stress distribution and compression stiffness of each group of models were observed through calculation and analysis,and mechanical stability of each group was compared. RESULTS AND CONCLUSION:(1)Through calculation and analysis,after calculating the compression stiffness by comparing the deformation of each model,the compression stiffness of each model under various loads showed the trend:physiological group>proximal femoral nail antirotation group>proximal femoral locking plate group>percutaneous compression plate group>dynamic hip screw group.The compressive stiffness of the complete physiological group model was significantly higher than that of all surgical group models.(2)The stress index was observed.Due to the stress shielding effect,the stress peak value of each fixed group was higher than that of physiological group,and the maximum peak value was concentrated on each internal fixation.Proximal femoral nail antirotation group had the smallest stress peak,while dynamic hip screw group had the highest stress.The stress distribution trend showed physiological group

ObjectiveTo find out whether there is any difference in the monitoring results of mosq-ovitraps placed in different orientations in multi-storey residential areas, so as to provide a scientific basis for routine and emergency monitoring of Aedes albopictus with mosq-ovitraps in residential areas. MethodsFrom July 6th to October 26th 2023, one mosquito ovitrap was set up in each of the 4 orientations of east, south, west and north around the buildings in a multi-storey residential area in Jinhui Town, Fengxian District, Shanghai. Data was collected and recorded 72 hours after placement. The chi-square test was used to compare the mosquito ovitrap indices (MOIs) of two independent samples, and the Kruskal⁃Wallis H test was used to compare the MOIs of multiple independent samples. ResultsAfter 16 weeks of surveillance, 997 mosquito ovitraps were recovered, of which 211 were positive, with the mosquito ovitrap index (MOI) of 21.16% and the Aedes albopictus density index of 1.03 mosquitoes·ovitrap^-1. The MOIs were higher in September (24.22%) and October (23.96%), and the MOIs in the west, south and north within the two months were all above 20.00%. From July to October, the MOIs in the east, west, south and north were 20.70%, 22.20%, 25.50% and 16.20%, respectively, and the difference in MOIs among the 4 orientations was not statistically significant (χ²=6.647, P=0.084). Stratified analysis by month showed that in August, the south side of the multi-storey residential areas had the highest MOI (31.30%), the north side had the lowest MOI (1.30%), and there was a statistically significant difference in MOI in the east, west, south and north (χ²=25.986, P<0.001). In October, the MOI in the west was the highest (33.30%) and the MOI in the east was the lowest (6.30%), the difference in MOIs of the 4 orientations was statistically significant (χ²=12.007, P=0.007). The MOIs in the south side of the building in the outskirts of the residential area from the 1st week in July to the 4th week in October was lower (19.20%) than that in the south side of the inner building (31.70%), and the difference in MOI was statistically significant (χ²=5.118, P=0.024). ConclusionThe study of MOI in different orientations in a multi-storey residential area is a preliminary exploration based on field work, and the results show that there is a difference in MOIs in different orientations during the peak breeding period of mosquitoes. Further indicators such as temperature, humidity and wind speed in different orientations can be collected to explore the influencing factors of MOIs.

ObjectiveTo construct a family-centered care model for children with tuberculosis based on the double ABC-X model, and to evaluate its clinical effects. MethodsFrom December 2022 to October 2023, 64 newly admitted children with tuberculosis who met the criteria and their caregivers were recruited from the tuberculosis department of Shanghai Public Health Clinical Center were randomly divided into an experimental group (32 cases) and a control group (32 cases).The control group was given a conventional health care, while the experimental group was given a family-centered health care intervention based on the double ABC-X model, in which a multidisciplinary care team provided personalized information and emotional support for the caregivers and their children. Medication adherence of the children, caregiver’s teading burden, and disease management competence were compared between the 2 groups. ResultsA total of 29 cases in the experimental group and 27 cases in the control group completed the intervention. At 12 weeks of intervention, the medication adherence score (7.72±0.45 vs 7.41±0.50, P<0.05) and disease management competence score (36.97±7.85 vs 31.56±7.30, P<0.05) were higher in the experimental group than that in the control group while the caregiving burden score (31.79±13.40 vs 40.04±9.01, P<0.05) and difficulty of disease management score (30.41±12.41 vs 38.56±9.48, P<0.05) were lower than that in the control group. At 24 weeks of intervention, the medication adherence score (7.34±0.97 vs 6.70±1.14, P<0.05) and disease management competence score (42.07±6.93 vs 35.63±7.32, P<0.05) were higher in the experimental group than that in the control group as well, but the caregiving burden score (31.62±11.72 vs 39.63±10.17, P<0.05) and difficulty of disease management score (30.59±10.87 vs 37.81±9.32, P<0.05) were lower than that in the control group. ConclusionFamily-centered care based on the double ABC-X model can effectively promote medication adherence among children with tuberculosis, reduce caregivers’ care burden and disease management difficulties, and improve caregiver’s disease management competence.

ObjectiveTo investigate the features of serum HBV RNA in different stages of the natural history of chronic hepatitis B virus （HBV） infection without antiviral treatment， as well as its correlation with serum HBV DNA and HBsAg. MethodsA total of 306 treatment-naïve patients with chronic HBV infection who attended Department of Infections Diseases and Hepatoloty， the Second Hospital of Shandong University from January 2023 to June 2024 were divided into six groups based on the different stages of natural history， i.e.， HBeAg-positive chronic HBV infection group with 29 patients， HBeAg-positive chronic hepatitis B （CHB） group with 107 patients， HBeAg-negative chronic HBV infection group with 18 patients， HBeAg-negative CHB group with 60 patients， HBeAg-positive indeterminate-phase chronic HBV infection group with 7 patients， and HBeAg-negative indeterminate-phase chronic HBV infection group with 85 patients. Real-time isothermal RNA amplification was used to measure serum high-sensitivity HBV RNA. The Kruskal-Wallis H test was used for comparison between multiple groups of continuous data， while the Mann-Whitney U test was used for comparison between two groups. The Spearman method was used to investigate the correlation of HBV RNA with HBV DNA and HBsAg. ResultsThe HBeAg-positive chronic HBV infection group showed the highest level of serum HBV RNA ［7.5 （7.4‍ ‍—‍ ‍7.9） log₁₀ copies/mL］， followed by the HBeAg-positive CHB group ［7.4 （6.4‍ ‍—‍ ‍7.9） log₁₀ copies/mL］， the HBeAg-negative CHB group ［4.5 （3.0‍ ‍—‍ ‍5.7） log₁₀ copies/mL］， and the HBeAg-negative chronic HBV infection group ［1.0 （1.0‍ ‍—‍ ‍2.0） log₁₀ copies/mL］； the HBeAg-positive indeterminate-phase chronic HBV infection group had a serum HBV RNA level of 3.9 （3.7‍ ‍—‍ ‍5.7） log₁₀ copies/mL， and the HBeAg-negative indeterminate-phase chronic HBV infection group had a serum HBV RNA level of 2.0 （1.0‍ ‍—‍ ‍3.0） log₁₀ copies/mL； there was a significant difference in serum HBV RNA level between the six groups （H=830.770， P<0.001）. There was a significant difference in HBV RNA level between the HBeAg-positive chronic HBV infection group and all the other groups except the HBeAg-positive CHB group （all P<0.001）. In the 306 patients with HBV infection， HBV RNA was strongly correlated with HBV DNA （r=0.92， P<0.001） and was moderately correlated with HBsAg （r=0.67， P<0.001）. The correlation between serum HBV RNA and HBsAg in HBeAg-positive patients （r=0.61， P<0.001） was stronger than that in HBeAg-negative patients （r=0.31， P<0.001）. For the patients with HBeAg-positive chronic HBV infection， the male patients with ALT>30 U/L and the female patients with ALT>19 U/L had a significantly lower serum HBV RNA level than the male patients with ALT≤30 U/L and the female patients with ALT≤19 U/L （P<0.001）， and there was no significant difference in serum HBV RNA level between the latter group of patients and the HBeAg-positive CHB group （P>0.05）. ConclusionIn patients with chronic HBV infection who do not receive antiviral therapy， there is a difference in serum HBV RNA level in different stages of natural history， and serum HBV RNA level has the strongest correlation with HBV DNA and a relatively weak correlation with HBsAg. In patients with HBeAg-positive chronic HBV infection， serum HBV RNA level in male patients with ALT>30 U/L and female patients with ALT>19 U/L are in the transition stage between HBeAg-positive chronic HBV infection and HBeAg-positive CHB.

The incidence of otogenic vertigo accounts for approximately 70% of all vertigo, presenting a sensation of surrounding objects moving and balance disturbances, accompanied by nausea, vomiting, and emotional changes, severely affecting quality of life in patients. Neuroimaging techniques have been widely used to observe structural and functional changes in related brain regions, and provide new insights into the mechanisms of vertigo. This paper aims to review the recent neuroimaging advancements in the study of central nervous mechanisms of otogenic vertigo, offering a imaging evidence for further exploration of related neuropathological mechanisms of otogenic vertigo.

ObjectiveTo explore the effects of compatibility of Ephedrae Herba，Asari Radix et Rhizoma， and Aconiti Lateralis Radix Praeparata on the expression of type 2 innate lymphoid cells（ILC2s）-related factors in the lung of allergic rhinitis（AR）mice. MethodsAccording to the random number table method，fifty-four C57BL/6J mice were randomly divided into the following groups： Blank group，model group，Mahuang Fuzi Xixintang group，Asari Radix et Rhizoma and Aconiti Lateralis Radix Praeparata group，Ephedrae Herba and Asari Radix et Rhizoma group，Ephedrae Herba and Aconiti Lateralis Radix Praeparata group，Ephedrae Herba group，Aconiti Lateralis Radix Praeparata group， and Asari Radix et Rhizoma group （6 mice in each group）. Except the blank group，the other groups were subjected to intraperitoneal injection of ovalbumin（OVA）and intranasal challenge to induce AR. After the AR model was established，the mice in the blank group and the model group were given 0.2 mL·d^-1 normal saline by gavage，while those in the Mahuang Fuzi Xixintang group（2.31 g·kg^-1），Asari Radix et Rhizoma and Aconiti Lateralis Radix Praeparata group（1.54 g·kg^-1）， Ephedrae Herba and Asari Radix et Rhizoma group（1.16 g·kg^-1）， Ephedrae Herba and Aconiti Lateralis Radix Praeparata group（1.93 g·kg^-1），Ephedrae Herba group（0.77 g·kg^-1），Aconiti Lateralis Radix Praeparata group（1.16 g·kg^-1），and Asari Radix et Rhizoma group（0.39 g·kg^-1）were given corresponding medicine by gavage，with the treatment lasting for 14 consecutive days. The survival state of mice in each group was observed， and the levels of serum immunoglobulins E（IgE）after intranasal challenge were measured by enzyme-linked immunosorbent assay（ELISA）. The pathological changes of nasal and lung tissues were observed by hematoxylin-eosin（HE）staining. The expression of ILC2s in lung tissue of mice was detected by immunofluorescence（IF）. The mRNA expression of GATA binding protein 3（GATA3），retinoic acid receptor-related orphan receptor-α（RORα）， and inhibitor of DNA binding 2（ID2）in the lung tissue of mice was detected by quantitative real-time polymerase chain reaction（real-time PCR）. The levels of IgE，interleukin（IL）-4，IL-5， and IL-13 in serum were detected by ELISA. ResultsCompared with the blank group，the model group had poor survival state of mice and significantly increased serum IgE level after intranasal challenge（p<0.01）. Additionally，the mice in the model group showed a large amount of neutrophil infiltration in the mucosa of the posterior turbinate， obvious nasal mucosal bleeding and purulent secretion，shed epithelium， thickened bronchial wall，obvious intravascular hyperemia and edema，diffusion and infiltration of a large number of inflammatory cells，seriously damaged alveolar structure，and local lung consolidation. The model group also exhibited significantly increased expression of ILC2s in the lung tissue（P<0.01），increased mRNA expression of GATA3 and RORα，decreased mRNA expression of ID2（P<0.05，P<0.01），and increased levels of serum IgE， IL-4，IL-5，and IL-13（P<0.05，P<0.01）. Compared with the model group，the Mahuang Fuzi Xixintang group and the other medicine treatment groups showed improved survival state of mice， significantly reduced inflammatory cell infiltration in the nasal and lung tissues，a small amount of nasal mucosal bleeding，trachea wall thinning，and no hyperemia，edema， and nasal secretions. Furthermore， the expression of ILC2s in lung tissue was significantly decreased（P<0.01）. The mRNA expression level of GATA3 was decreased（P<0.05），especially in the Aconiti Lateralis Radix Praeparata group（P<0.01）. The expression mRNA levels of RORα were decreased only in the Ephedrae Herba and Aconiti Lateralis Radix Praeparata group and the Ephedrae Herba group（P<0.05）. The levels of serum IgE were decreased（P<0.05）， and IL-5 levels were significantly decreased（P<0.01）. IL-4 levels were significantly decreased in the groups except the Aconiti Lateralis Radix Praeparata group（P<0.01），and the level of IL-13 in the Mahuang Fuzi Xixintang group was decreased（P<0.05）. The levels of IL-13 in were significantly decreased in the Ephedrae Herba and Aconiti Lateralis Radix Praeparata group， Ephedrae Herba group， Aconiti Lateralis Radix Praeparata group， and Asari Radix et Rhizoma group（P<0.01）. ConclusionDifferent compatibility of Ephedrae Herba，Asari Radix et Rhizoma， and Aconiti Lateralis Radix Praeparata can reduce the inflammation of OVA-induced AR mice and has more advantages in reducing the secretion of IgE and IL-5. The compatibility of Ephedrae Herba and Aconiti Lateralis Radix Praeparata has the most advantage in reducing the mRNA expression of GATA3 and RORα to inhibit the expression of ILC2s and thus exert the anti-allergic effect，while the other compatibility has the extensive advantage in inhibiting the mRNA expression of GATA3.

ObjectiveTo investigate the mechanism of danshenol A （DA） pretreatment in alleviating myocardial ischemia-reperfusion injury （MIRI） by regulating cardiomyocyte ferroptosis by in vivo and in vitro experiments. MethodsA MIRI model was established in SD rats， and an in vitro oxygen-glucose deprivation/reoxygenation （OGD/R） model was constructed with H9C2 cells. Both models were treated with DA. H9C2 cells were allocated into blank， model （OGD/R）， DA， ferroptosis inducer （erastin）， and ferroptosis inhibitor （Fer-1） groups. Cell viability was assessed by the methyl thiazolyl tetrazolium （MTT） assay. Biochemical assays were performed to measure the superoxide dismutase （SOD）， malondialdehyde （MDA）， glutathione （GSH）， and ferrous ion （Fe²⁺） levels. Dihydroethidium （DHE） fluorescence assay was adopted to quantify the reactive oxygen species （ROS） level. Real-time PCR and Western blot were employed to quantify the mRNA and protein levels， respectively， of prostaglandin-endoperoxide synthase 2 （PTGS2）， glutathione peroxidase 4 （GPX4）， ferritin heavy chain 1 （FTH1）， and acyl-coA synthetase long-chain family 4 （ACSL4）. Sixty SPF-grade healthy male SD rats were randomly assigned to control， model （MIRI）， DA， erastin， and Fer-1 groups. Enzyme-linked immunosorbent assay （ELISA） was adopted to measure the serum levels of cardiac troponin I （cTnI）， lactate dehydrogenase （LDH）， and creatine kinase （CK）. Histopathological changes in the myocardial tissue were observed by hematoxylin-eosin （HE） staining. Cardiomyocyte apoptosis was detected by terminal deoxynucleotidyl transferase-mediated nick end labeling （TUNEL）. The effect of DA on cardiomyocyte ferroptosis were observed and analyzed by in vivo and in vitro experiments. ResultsIn vitro experiment： compared with the blank group， the OGD/R model group showed reduced cell viability， elevated levels of ROS， MDA， and Fe²⁺， up-regulated mRNA and protein levels of ACSL4， lowered levels of SOD and GSH， and down-regulated mRNA and protein levels of PTGS2， GPX4， and FTH1 （P<0.05，P<0.01）. The DA and Fer-1 groups exhibited consistent trends： cell viability， SOD and GSH levels， and the mRNA and protein levels of PTGS2， GPX4， and FTH1 were significantly restored， while the ROS， MDA， and Fe²⁺ levels， and the mRNA and protein levels of ACSL4 were reduced （P<0.05，P<0.01）. In vivo experiment： Compared with the control group， the MIRI model group showed elevated serum levels of cTnI， LDH， and CK， increased cardiomyocyte apoptosis rate， risen levels of ROS， MDA， and Fe²⁺， and up-regulated mRNA and protein levels of ACSL4. However， both DA and Fer-1 groups exhibited reductions in the indicators above （P<0.05）. Compared with the control group， the MIRI model group demonstrated reduced levels of SOD and GSH and down-regulated mRNA and protein levels of PTGS2， GPX4， and FTH1 （P<0.05）. In contrast， both DA and Fer-1 upregulated these indicators （P<0.05）， effectively reversing the trends in the model group. In addition， the MIRI model group showed swelling of cardiomyocytes， disarrangement of cardiac muscle fibers， and massive inflammatory cell infiltration， which were alleviated in the DA and Fer-1 groups. ConclusionDA alleviates MIRI by inhibiting ferroptosis and inflammation， demonstrating therapeutic potential in acute myocardial infarction.

Investigator initiated trial （IIT） represents a primary format for clinical research in traditional Chinese medicine （TCM）. As key implementation sites for TCM-based IIT targeting malignant tumors， western medicine institutions often face unique challenges in conducting such studies， which limit their feasibility and standardization. This paper reviews the registration status of TCM-based IIT for malignancies conducted in western medical institutions and analyzes key difficulties， including complex project initiation and management processes， limited TCM knowledge and skills among western medicine physicians， and relatively low patient acceptance of TCM. From a practical perspective， the study proposes several optimization strategies. These include improving the review and management mechanisms of TCM-related IIT within western medical institutions， establishing multidisciplinary clinical research teams that integrate TCM and western medicine， and enhancing investigators' training in TCM theory and clinical skills. Additionally， the study suggests standardizing IIT operational procedures， objectifying the collection of TCM diagnostic information， refining subject recruitment methods， and increasing TCM involvement in patient follow-up and management. These investigator-oriented， TCM-featured， and operable strategies aim to promote the high-quality development of TCM-based IIT in western medicine institutions and enhance the clinical application of TCM.

ObjectiveTo explore the effects of compatibility of Ephedrae Herba，Asari Radix et Rhizoma， and Aconiti Lateralis Radix Praeparata on the expression of type 2 innate lymphoid cells（ILC2s）-related factors in the lung of allergic rhinitis（AR）mice. MethodsAccording to the random number table method，fifty-four C57BL/6J mice were randomly divided into the following groups： Blank group，model group，Mahuang Fuzi Xixintang group，Asari Radix et Rhizoma and Aconiti Lateralis Radix Praeparata group，Ephedrae Herba and Asari Radix et Rhizoma group，Ephedrae Herba and Aconiti Lateralis Radix Praeparata group，Ephedrae Herba group，Aconiti Lateralis Radix Praeparata group， and Asari Radix et Rhizoma group （6 mice in each group）. Except the blank group，the other groups were subjected to intraperitoneal injection of ovalbumin（OVA）and intranasal challenge to induce AR. After the AR model was established，the mice in the blank group and the model group were given 0.2 mL·d^-1 normal saline by gavage，while those in the Mahuang Fuzi Xixintang group（2.31 g·kg^-1），Asari Radix et Rhizoma and Aconiti Lateralis Radix Praeparata group（1.54 g·kg^-1）， Ephedrae Herba and Asari Radix et Rhizoma group（1.16 g·kg^-1）， Ephedrae Herba and Aconiti Lateralis Radix Praeparata group（1.93 g·kg^-1），Ephedrae Herba group（0.77 g·kg^-1），Aconiti Lateralis Radix Praeparata group（1.16 g·kg^-1），and Asari Radix et Rhizoma group（0.39 g·kg^-1）were given corresponding medicine by gavage，with the treatment lasting for 14 consecutive days. The survival state of mice in each group was observed， and the levels of serum immunoglobulins E（IgE）after intranasal challenge were measured by enzyme-linked immunosorbent assay（ELISA）. The pathological changes of nasal and lung tissues were observed by hematoxylin-eosin（HE）staining. The expression of ILC2s in lung tissue of mice was detected by immunofluorescence（IF）. The mRNA expression of GATA binding protein 3（GATA3），retinoic acid receptor-related orphan receptor-α（RORα）， and inhibitor of DNA binding 2（ID2）in the lung tissue of mice was detected by quantitative real-time polymerase chain reaction（real-time PCR）. The levels of IgE，interleukin（IL）-4，IL-5， and IL-13 in serum were detected by ELISA. ResultsCompared with the blank group，the model group had poor survival state of mice and significantly increased serum IgE level after intranasal challenge（p<0.01）. Additionally，the mice in the model group showed a large amount of neutrophil infiltration in the mucosa of the posterior turbinate， obvious nasal mucosal bleeding and purulent secretion，shed epithelium， thickened bronchial wall，obvious intravascular hyperemia and edema，diffusion and infiltration of a large number of inflammatory cells，seriously damaged alveolar structure，and local lung consolidation. The model group also exhibited significantly increased expression of ILC2s in the lung tissue（P<0.01），increased mRNA expression of GATA3 and RORα，decreased mRNA expression of ID2（P<0.05，P<0.01），and increased levels of serum IgE， IL-4，IL-5，and IL-13（P<0.05，P<0.01）. Compared with the model group，the Mahuang Fuzi Xixintang group and the other medicine treatment groups showed improved survival state of mice， significantly reduced inflammatory cell infiltration in the nasal and lung tissues，a small amount of nasal mucosal bleeding，trachea wall thinning，and no hyperemia，edema， and nasal secretions. Furthermore， the expression of ILC2s in lung tissue was significantly decreased（P<0.01）. The mRNA expression level of GATA3 was decreased（P<0.05），especially in the Aconiti Lateralis Radix Praeparata group（P<0.01）. The expression mRNA levels of RORα were decreased only in the Ephedrae Herba and Aconiti Lateralis Radix Praeparata group and the Ephedrae Herba group（P<0.05）. The levels of serum IgE were decreased（P<0.05）， and IL-5 levels were significantly decreased（P<0.01）. IL-4 levels were significantly decreased in the groups except the Aconiti Lateralis Radix Praeparata group（P<0.01），and the level of IL-13 in the Mahuang Fuzi Xixintang group was decreased（P<0.05）. The levels of IL-13 in were significantly decreased in the Ephedrae Herba and Aconiti Lateralis Radix Praeparata group， Ephedrae Herba group， Aconiti Lateralis Radix Praeparata group， and Asari Radix et Rhizoma group（P<0.01）. ConclusionDifferent compatibility of Ephedrae Herba，Asari Radix et Rhizoma， and Aconiti Lateralis Radix Praeparata can reduce the inflammation of OVA-induced AR mice and has more advantages in reducing the secretion of IgE and IL-5. The compatibility of Ephedrae Herba and Aconiti Lateralis Radix Praeparata has the most advantage in reducing the mRNA expression of GATA3 and RORα to inhibit the expression of ILC2s and thus exert the anti-allergic effect，while the other compatibility has the extensive advantage in inhibiting the mRNA expression of GATA3.

ObjectiveTo investigate the mechanism of danshenol A （DA） pretreatment in alleviating myocardial ischemia-reperfusion injury （MIRI） by regulating cardiomyocyte ferroptosis by in vivo and in vitro experiments. MethodsA MIRI model was established in SD rats， and an in vitro oxygen-glucose deprivation/reoxygenation （OGD/R） model was constructed with H9C2 cells. Both models were treated with DA. H9C2 cells were allocated into blank， model （OGD/R）， DA， ferroptosis inducer （erastin）， and ferroptosis inhibitor （Fer-1） groups. Cell viability was assessed by the methyl thiazolyl tetrazolium （MTT） assay. Biochemical assays were performed to measure the superoxide dismutase （SOD）， malondialdehyde （MDA）， glutathione （GSH）， and ferrous ion （Fe²⁺） levels. Dihydroethidium （DHE） fluorescence assay was adopted to quantify the reactive oxygen species （ROS） level. Real-time PCR and Western blot were employed to quantify the mRNA and protein levels， respectively， of prostaglandin-endoperoxide synthase 2 （PTGS2）， glutathione peroxidase 4 （GPX4）， ferritin heavy chain 1 （FTH1）， and acyl-coA synthetase long-chain family 4 （ACSL4）. Sixty SPF-grade healthy male SD rats were randomly assigned to control， model （MIRI）， DA， erastin， and Fer-1 groups. Enzyme-linked immunosorbent assay （ELISA） was adopted to measure the serum levels of cardiac troponin I （cTnI）， lactate dehydrogenase （LDH）， and creatine kinase （CK）. Histopathological changes in the myocardial tissue were observed by hematoxylin-eosin （HE） staining. Cardiomyocyte apoptosis was detected by terminal deoxynucleotidyl transferase-mediated nick end labeling （TUNEL）. The effect of DA on cardiomyocyte ferroptosis were observed and analyzed by in vivo and in vitro experiments. ResultsIn vitro experiment： compared with the blank group， the OGD/R model group showed reduced cell viability， elevated levels of ROS， MDA， and Fe²⁺， up-regulated mRNA and protein levels of ACSL4， lowered levels of SOD and GSH， and down-regulated mRNA and protein levels of PTGS2， GPX4， and FTH1 （P<0.05，P<0.01）. The DA and Fer-1 groups exhibited consistent trends： cell viability， SOD and GSH levels， and the mRNA and protein levels of PTGS2， GPX4， and FTH1 were significantly restored， while the ROS， MDA， and Fe²⁺ levels， and the mRNA and protein levels of ACSL4 were reduced （P<0.05，P<0.01）. In vivo experiment： Compared with the control group， the MIRI model group showed elevated serum levels of cTnI， LDH， and CK， increased cardiomyocyte apoptosis rate， risen levels of ROS， MDA， and Fe²⁺， and up-regulated mRNA and protein levels of ACSL4. However， both DA and Fer-1 groups exhibited reductions in the indicators above （P<0.05）. Compared with the control group， the MIRI model group demonstrated reduced levels of SOD and GSH and down-regulated mRNA and protein levels of PTGS2， GPX4， and FTH1 （P<0.05）. In contrast， both DA and Fer-1 upregulated these indicators （P<0.05）， effectively reversing the trends in the model group. In addition， the MIRI model group showed swelling of cardiomyocytes， disarrangement of cardiac muscle fibers， and massive inflammatory cell infiltration， which were alleviated in the DA and Fer-1 groups. ConclusionDA alleviates MIRI by inhibiting ferroptosis and inflammation， demonstrating therapeutic potential in acute myocardial infarction.