Abdominal aortic aneurysm (AAA) is a deadly condition of the aorta, carrying a significant risk of death upon rupture. Currently, there is a dearth of efficacious pharmaceutical interventions to impede the advancement of AAA and avert it from rupturing. Here, we investigated dihydromyricetin (DHM), one of the predominant bioactive flavonoids in Ampelopsis grossedentata (A. grossedentata), as a potential agent for inhibiting AAA. DHM effectively blocked the formation of AAA in angiotensin II-infused apolipoprotein E-deficient (ApoE^-/-) mice. A combination of network pharmacology and whole transcriptome sequencing analysis revealed that DHM's anti-AAA action is linked to heme oxygenase (HO)-1 (Hmox-1 for the rodent gene) and hypoxia-inducible factor (HIF)-1α in vascular smooth muscle cells (VSMCs). Remarkably, DHM caused a robust rise (∼10-fold) of HO-1 protein expression in VSMCs, thereby suppressing VSMC inflammation and oxidative stress and preserving the VSMC contractile phenotype. Intriguingly, the therapeutic effect of DHM on AAA was largely abrogated by VSMC-specific Hmox1 knockdown in mice. Mechanistically, on one hand, DHM increased the transcription of Hmox-1 by triggering the nuclear translocation and activation of HIF-1α, but not nuclear factor erythroid 2-related factor 2 (NRF2). On the other hand, molecular docking, combined with cellular thermal shift assay (CETSA), isothermal titration calorimetry (ITC), drug affinity responsive target stability (DARTS), co-immunoprecipitation (Co-IP), and site mutant experiments revealed that DHM bonded to HO-1 at Lys243 and prevented its degradation, thereby resulting in considerable HO-1 buildup. In summary, our findings suggest that naturally derived DHM has the capacity to markedly enhance HO-1 expression in VSMCs, which may hold promise as a therapeutic strategy for AAA.

Objective We sought to learn the cognition and attitude of doctors,nurses,patients and patients' family members for male nurses and compare the differences in nursing skills between men and women in order to provide basic information and a basis for further improving the quality of hospital care and promote the comprehensive development of nursing disciplines.Methods Some doctors,female nurses,patients and their family members of patients from the five top hospitals were randomly selected as research subjects to investigate the cognitive attitudes towards male nurses.50 male nurses from the five top hospitals were randomly selected,then 50 female nurses with the same academic level and specialty were selected as the control group,and nursing skills were compared between the two groups.Results This study investigated a total of 304 doctors,522 female nurses,258 patients,176 patients' family members.The cognition attitude to male nurses by doctors,female nurses,patients and their families showed statistically significant differences.Emergency department,operating room,intensive care unit were four departments which were considered to be in great need of male nurses.The differences were statistically significant between men and women nurses in scores of aseptic technique,intravenous infusion operation,suction operation,single unarmed CPR skills.Pearson correlation analysis was conducted between education,working years and scores and total score of four operation skills,the results showed that working life was correlated with aseptic technique score of female nurses,the correlation coefficient was 0.409,the scores of the remaining skills did not showed correlation with education and working years yet.Conclusions Doctors,female nurses,patients and patients' families showed a certain degree of acceptance and positive attitude to male nurses.Male nurses showed advantages in the emergency department,operating room,intensive care unit and other nursing post.Male and female nurses demonstrated the same level of basic nursing skills.