BACKGROUND Prompt and effective cardiopulmonary resuscitation(CPR)can promote the recovery of spontaneous circulation to some extent and can save patients’lives.The minimum target of cardiac resuscitation is the rest...BACKGROUND Prompt and effective cardiopulmonary resuscitation(CPR)can promote the recovery of spontaneous circulation to some extent and can save patients’lives.The minimum target of cardiac resuscitation is the restoration of spontaneous circulation(ROSC).However,owing to prolonged sudden cardiac arrest,there is relatively high mortality within 24 h after cardiac resuscitation.Moreover,severe cerebral anoxia can deteriorate the prognosis of patients.Therefore,it is important to adopt an effective clinical evaluation of acute myocardial infarct(AMI)patients’prognosis after cardiac resuscitation for the purpose of prevention and management.AIM To investigate early CPR effects on human myeloperoxidase(MPO),soluble ST2(sST2),and hypersensitive C-reactive protein(hs-CRP)levels in AMI patients.METHODS In total,54 patients with cardiac arrest caused by AMI in our hospital were selected as the observation group,and 50 other patients with AMI were selected as the control group.The differences in serum levels of MPO,sST2,and hs-CRP between the observation group and the control group were tested,and the differences in the serum levels of MPO,sST2,and hs-CRP in ROSC and non-ROSC patients,and in patients who died and in those who survived,were analyzed.RESULTS Serum levels of MPO,sST2,hs-CRP,lactic acid,creatine kinase isoenzyme(CKMB),and cardiac troponin I(cTnI)were significantly higher in the observation group than in the control group(P<0.05).Serum levels of MPO,sST2,hs-CRP,lactic acid,CK-MB,and cTnI in the observation group were lower after CPR than before CPR(P<0.05).In the observation group,MPO,sST2,hs-CRP,lactic acid,CK-MB,and cTnI serum levels were lower in ROSC patients than in non-ROSC patients(P<0.05).MPO,sST2,hs-CRP,and lactic acid serum levels of patients who died in the observation group were higher than those of patients who survived(P<0.05).The areas under receiver operating characteristic curve predicted by MPO,sST2,hs-CRP,lactic acid,CK-MB,and cTnI were 0.616,0.681,0.705,0.704,0.702,and 0.656,respectively(P<0.05).The areas under receiver operating characteristic curve for MPO,SST2,hs-CRP,and lactic acid to predict death were 0.724,0.800,0.689,and 0.691,respectively(P<0.05).Logistic regression analysis showed that MPO,sST2,and hs-CRP were the influencing factors of ROSC[odds ratios=1.667,1.589,and 1.409,P<0.05],while MPO,sST2,hs-CRP,and lactic acid were the influencing factors of death(odds ratios=1.624,1.525,1.451,and 1.365,P<0.05).CONCLUSION Serum levels of MPO,sST2,hs-CRP,and lactic acid have a certain value in predicting recovery and prognosis of patients with ROSC.展开更多
Background and Objectives: Protein kinase C (PKC) activation plays an important role in activation of T-lymphocytes in asthma. Airway hypersensitivity is one of the main characteristic features of asthma, the mechanis...Background and Objectives: Protein kinase C (PKC) activation plays an important role in activation of T-lymphocytes in asthma. Airway hypersensitivity is one of the main characteristic features of asthma, the mechanism of onset of which is not clearly understood. Therefore, the objective was to elucidate the role of PKC in etiopathogenesis of airway hypersensitivity in asthma. Methods: Male guinea pigs (n = 30) were sensitized with ovalbumin and day of initial allergen-specific immune response determined by intradermal test, airway hypersensitivity, BALF cytology and lung histopathology. Total PKC activity, PKC isoenzymes and phosphoinositides were assessed in airway smooth muscles (ASM) and peripheral blood lymphocytes. Results: Intradermal test revealed that day 9 was the earliest time of allergen-specific response and onset of airway hypersensitivity to ovalbumin. It was associated with significant increase in total and differential (lymphocytes and eosinophils) BALF counts and grade I peribronchiolar chronic lymphocytic inflammation in lung. On day 14, grade II infiltration of lymphocytes and eosinophils with onset ofstructural remodelingofproximal and distal airways was seen. Total PKC activity, expression of PKCα, PKCε and phosphoinositides increased significantly in ASM and lymphocytes on day 9 and were maximum on day 14. There was no change in PKC-τ expression. Conclusions: Activation of PKC, particularly PKCα and PKCε, mediated signal transduction pathway plays a critical role in lymphocyte infiltration and onset of airway hypersensitivity, airway remodeling and asthma pathophysiology. The present study is the first one on the mechanism of the etiopathogenesis of the disease, which shows a direct evidence of the role of PKC mediated pathway in the initiation and onset of airway hypersensitivity in ovalbumin sensitized guinea pig model.展开更多
基金Key R&D Projects in Shanxi Province,China,No.201903D321184.
文摘BACKGROUND Prompt and effective cardiopulmonary resuscitation(CPR)can promote the recovery of spontaneous circulation to some extent and can save patients’lives.The minimum target of cardiac resuscitation is the restoration of spontaneous circulation(ROSC).However,owing to prolonged sudden cardiac arrest,there is relatively high mortality within 24 h after cardiac resuscitation.Moreover,severe cerebral anoxia can deteriorate the prognosis of patients.Therefore,it is important to adopt an effective clinical evaluation of acute myocardial infarct(AMI)patients’prognosis after cardiac resuscitation for the purpose of prevention and management.AIM To investigate early CPR effects on human myeloperoxidase(MPO),soluble ST2(sST2),and hypersensitive C-reactive protein(hs-CRP)levels in AMI patients.METHODS In total,54 patients with cardiac arrest caused by AMI in our hospital were selected as the observation group,and 50 other patients with AMI were selected as the control group.The differences in serum levels of MPO,sST2,and hs-CRP between the observation group and the control group were tested,and the differences in the serum levels of MPO,sST2,and hs-CRP in ROSC and non-ROSC patients,and in patients who died and in those who survived,were analyzed.RESULTS Serum levels of MPO,sST2,hs-CRP,lactic acid,creatine kinase isoenzyme(CKMB),and cardiac troponin I(cTnI)were significantly higher in the observation group than in the control group(P<0.05).Serum levels of MPO,sST2,hs-CRP,lactic acid,CK-MB,and cTnI in the observation group were lower after CPR than before CPR(P<0.05).In the observation group,MPO,sST2,hs-CRP,lactic acid,CK-MB,and cTnI serum levels were lower in ROSC patients than in non-ROSC patients(P<0.05).MPO,sST2,hs-CRP,and lactic acid serum levels of patients who died in the observation group were higher than those of patients who survived(P<0.05).The areas under receiver operating characteristic curve predicted by MPO,sST2,hs-CRP,lactic acid,CK-MB,and cTnI were 0.616,0.681,0.705,0.704,0.702,and 0.656,respectively(P<0.05).The areas under receiver operating characteristic curve for MPO,SST2,hs-CRP,and lactic acid to predict death were 0.724,0.800,0.689,and 0.691,respectively(P<0.05).Logistic regression analysis showed that MPO,sST2,and hs-CRP were the influencing factors of ROSC[odds ratios=1.667,1.589,and 1.409,P<0.05],while MPO,sST2,hs-CRP,and lactic acid were the influencing factors of death(odds ratios=1.624,1.525,1.451,and 1.365,P<0.05).CONCLUSION Serum levels of MPO,sST2,hs-CRP,and lactic acid have a certain value in predicting recovery and prognosis of patients with ROSC.
文摘Background and Objectives: Protein kinase C (PKC) activation plays an important role in activation of T-lymphocytes in asthma. Airway hypersensitivity is one of the main characteristic features of asthma, the mechanism of onset of which is not clearly understood. Therefore, the objective was to elucidate the role of PKC in etiopathogenesis of airway hypersensitivity in asthma. Methods: Male guinea pigs (n = 30) were sensitized with ovalbumin and day of initial allergen-specific immune response determined by intradermal test, airway hypersensitivity, BALF cytology and lung histopathology. Total PKC activity, PKC isoenzymes and phosphoinositides were assessed in airway smooth muscles (ASM) and peripheral blood lymphocytes. Results: Intradermal test revealed that day 9 was the earliest time of allergen-specific response and onset of airway hypersensitivity to ovalbumin. It was associated with significant increase in total and differential (lymphocytes and eosinophils) BALF counts and grade I peribronchiolar chronic lymphocytic inflammation in lung. On day 14, grade II infiltration of lymphocytes and eosinophils with onset ofstructural remodelingofproximal and distal airways was seen. Total PKC activity, expression of PKCα, PKCε and phosphoinositides increased significantly in ASM and lymphocytes on day 9 and were maximum on day 14. There was no change in PKC-τ expression. Conclusions: Activation of PKC, particularly PKCα and PKCε, mediated signal transduction pathway plays a critical role in lymphocyte infiltration and onset of airway hypersensitivity, airway remodeling and asthma pathophysiology. The present study is the first one on the mechanism of the etiopathogenesis of the disease, which shows a direct evidence of the role of PKC mediated pathway in the initiation and onset of airway hypersensitivity in ovalbumin sensitized guinea pig model.
