Aim To observe the effects of total flavones of hippophae rhamnoides L on myocardial ischemia-reperfusion injury and the MMP-9 and TIMP-1 expression in cardiac tissues of rats,and to explore the protective mechanism of total flavones of hippophae rhamnoides L on myocardial ischemia-reperfusion injury.Methods Fifty rats were classified into 4 groups by using the random grouping principle:model group,losartan group,sindacon group of different doses and sham operation group.The myocardial ischemia-reperfusion injury model was established by ligating left anterior descending coronary artery for 30 minutes and releasing then.The cardiac muscle tissue was stained by HE to observe its necrosis area and pathological changes as well as the expression of MMP-9 and TIMP-1by immunohistochemistry method.Results HE sections showed that necrosis of cardiac muscle in rats was significantly relieved in sindacon group by using different doses compared with model group,and immunohistochemistry sections showed that the sindacon group using different doses decreased the expression of MMP-9 compared with the model group and increased the expression of TIMP-1.Conclusion Sindacon has protective effect on cardiac muscle after the myocardial ischemia-reperfusion injury,and its mechanism may be related to its inhibition of the MMP-9 and increasing TMPM-1 expression in cardiac muscle.

Heart Atria ; Humans ; Speech ; Tachycardia

AIM: To establish the experimental acute pulmonary embolism(APE) model and observe the left and right ventricular pressure-volume relationship in different overload situations. METHODS: The present study consisted of seven anesthetized mongrel dogs that were divided into the control group, moderate APE group and severe APE group according to the various phase and different pressure load during the experiment. APE model was induced by suture piece injection through right cardiac catheterization. The hemodynamic indexes were measured by the simultaneous cardiac catheterization and echocardiography.RESULTS: (1) In the group with moderate APE, the pressure-volume relationship of right ventricle tended to right-upward shift, the area of chart increased, the shape of chart transformed form triangle to rectangle. The mild parallel leftward shift, the area of chart decreased mildly and no change of chart shape was observed in the pressure-volume relationship of left ventricle. (2) In the group with severe APE, the chart of right ventricular pressure-volume relationship tended to right-upward shift continuously, the area of chart decreased. The chart of the left ventricle tended to left-downward shift and no change of chart shape was observed in the pressure-volume relationship of left ventricle, the area of chart decreased. The erose shape of charts was also found.CONCLUSION: The chart of ventricular pressure-volume relationships is a practical and reliable method to evaluate left and right ventricular hemodynamic in APE.

Objective To investigate the clinical diagnostic value and pathogenesis of serum protein identification in Keshan disease (KD).Methods A total of 65 chronic KD patients were selected as the patient group in KD endemic areas,while 29 cases of dilated cardiomyopathy (the DCM group),62 healthy cases from KD endemic areas (control 1 group) and 28 healthy cases from non-endemic areas (control 2 group) were selected as controls.Liquid chip time of flight mass spectrometry (ClinProtTM MALDI-TOF-MS) was used to determine the expression of proteins/peptide peaks.ClinProTools 2.2 software was used to analyze the protein profiles to determine differentially expressed proteins/peptide peaks.The Genetic Algorithm (GA),QuickClassifer Algorithm (QC) and Supervised Neural Network Algorithm (SNN) methods were used to screen marker proteins.Matrix-assisted laser desorption/ionization time-of-flight Mass Spectrometry technique (MALDI-TOF/TOF) was also used as a secondary mass spectrometry to identify differentially expressed peptides.Results Between the KD and control 1 groups,34 differentially expressed proteins/peptides and 5 marker proteins were identified,while 52 differentially expressed proteins/peptides and 5 marker proteins were identified between the KD and control 2 groups,and there were 67 differentially expressed proteins/peptides and 5 marker proteins between the KD and DCM groups.During secondary mass spectrometry,two peptides for mass-to-charge ratio (m/z) 2 079 and 1 465 were obtained,peptide of matching β-globin showed low expression while peptide of matching fibrinogen showed high expression in the KD patients.Conclusions Serum marker proteins can be used as biomarkers for diagnosis and differentiation of KD.β-globin and fibrinogen play an important role in the development of KD myocardial injury.