Objective: To observe the changes of plasma concentrations of endotoxin, soluble intercellular adhesion molecule 1, tumor necrosis factor α, and urinary microalbumin in children undergoing cardiac procedure and to st...Objective: To observe the changes of plasma concentrations of endotoxin, soluble intercellular adhesion molecule 1, tumor necrosis factor α, and urinary microalbumin in children undergoing cardiac procedure and to study the effects of cardiopulmonary bypass (CPB) on the injury or activation of endothelial cells and vascular permeability. Methods: Twenty children undergoing cardiac operation with CPB were selected in the study. Plasma concentrations of endotoxin, soluble intercellular adhesion molecule 1, tumor necrosis factor α, and urinary microalbumin were measured after anesthetic induction (baseline), bypass for 20 minutes, at the end of CPB, and at 2, 4, and 18 h after the end of CPB. Results: The plasma concentrations of endotoxin, soluble intercellular adhesion molecule 1, and urinary microalbumin began to increase at 2 h after the end of CPB, and remained higher than that of the baseline, while the concentration of tumor necrosis factor α increased only at the end CPB and at 2 h after the end of CPB. Conclusion: Cardiopulmonary bypass can induce inflammatory response, resulting in the activation or injury of vascular endothelial cells, and can increase the vascular permeability.展开更多
Background. Our previous studies indicated that the increased arginine vasopressin(AVP) in ischemic brain regions of gerbils could exacerbate the ischemic brain edema. This experiments is further clarify the relation ...Background. Our previous studies indicated that the increased arginine vasopressin(AVP) in ischemic brain regions of gerbils could exacerbate the ischemic brain edema. This experiments is further clarify the relation between AVP and cerebral ischemia at the molecular level. Methods. The contents of AVP, AVP mRNA, AVP immunoreactive(ir) neurons in supraoptic nucleus(SON) and paraventricular nucleus(PVN) after cerebral ischemia and reperfusion were respectively determined by radioimmunoassay(RIA), immunocytochemistry(ⅡC), situ hybridization and computed image pattern analysis. Results. The contents of AVP in SON, PVN were increased, and the AVP ir positive neurons in SON and PVN were also significantly increased as compared with the controls after ischemia and reperfusion. And there were very light staining of AVP ir positive neurons in the other brain areas such as suprachiasmatic nucleus (SC) and periventricular hypothalamic nucleus (PE), but these have no significant changes as compared with the controls. During different periods of cerebral ischemia (30～120 min) and reperfusion (30 min), AVP mRNA expression in SON and PVN were more markedly increased than the controls. Conclusions. The transcription of AVP gene elevated, then promoting synthesis and release of AVP in SON, PVN. Under the specific condition of cerebral ischemia and reperfusion, the activity and contents of central AVP increased abnormally is one of the important factors which causes ischemia brain damage.展开更多
Objective： To explore the role of polymorphonuclear neutrophils （PMN） activation in lung injury following cardiopulmonary bypass （CPB）. Methods： Twenty four cases of patients with rheumatic heart disease were en...Objective： To explore the role of polymorphonuclear neutrophils （PMN） activation in lung injury following cardiopulmonary bypass （CPB）. Methods： Twenty four cases of patients with rheumatic heart disease were enrolled in this study to detect the situation of PMN activation and the degree of lung injury. Bronchoalveolar lavage fluid （BALF） and blood samples were collected just after anaesthesia and 4 h postoperatively. Related clinic data were recorded. Results： This cohort included 4 male and 20 female with age ranging from 29 to 69 years old, and body mass from 37 to 73 kg. Mean cardiopulmonary bypass time was （106.46±33.58） rain, mean cross clamp time was （77.58_＋28.02） rain, and mean mechanical ventilation time was （24.17±30.90） h. Postoperative PaO2/FiO2 decreased significantly than that during preoperation （P=0.000）. The postoperative WBC counts in peripheral blood and in BALF were both increased significantly than those during preoperation. And the postoperative rates of PMN in BALF were also increased significantly. Postoperative neutriphil elastase （NE） and myeloperoxidase （MPO） released from inflammatory ceils were increased significantly （P=0.000） both in plasma and BALF. The postoperative yon Willebrand factor （vWF） concentration in plasma was also increased significantly （P=0.000）. The postoperative concentration of sLPI in plasma was decreased, whereas it was increased significantly in BALF. Furthermore, there was a negative correlation between NE and PaO2/FiO2 both in BALF and in plasma. A negative correlation was present between vWF in plasma and PaO2/FiO2. A positive correlation was found between sLPI in plasma and PaO2/FiO2. Conclusion： PMN is recruited and activated after CPB and released large quantity of proteases, and lead to lung injury, sLPI is an important protective factor against inflammatory injury.展开更多
文摘Objective: To observe the changes of plasma concentrations of endotoxin, soluble intercellular adhesion molecule 1, tumor necrosis factor α, and urinary microalbumin in children undergoing cardiac procedure and to study the effects of cardiopulmonary bypass (CPB) on the injury or activation of endothelial cells and vascular permeability. Methods: Twenty children undergoing cardiac operation with CPB were selected in the study. Plasma concentrations of endotoxin, soluble intercellular adhesion molecule 1, tumor necrosis factor α, and urinary microalbumin were measured after anesthetic induction (baseline), bypass for 20 minutes, at the end of CPB, and at 2, 4, and 18 h after the end of CPB. Results: The plasma concentrations of endotoxin, soluble intercellular adhesion molecule 1, and urinary microalbumin began to increase at 2 h after the end of CPB, and remained higher than that of the baseline, while the concentration of tumor necrosis factor α increased only at the end CPB and at 2 h after the end of CPB. Conclusion: Cardiopulmonary bypass can induce inflammatory response, resulting in the activation or injury of vascular endothelial cells, and can increase the vascular permeability.
文摘Background. Our previous studies indicated that the increased arginine vasopressin(AVP) in ischemic brain regions of gerbils could exacerbate the ischemic brain edema. This experiments is further clarify the relation between AVP and cerebral ischemia at the molecular level. Methods. The contents of AVP, AVP mRNA, AVP immunoreactive(ir) neurons in supraoptic nucleus(SON) and paraventricular nucleus(PVN) after cerebral ischemia and reperfusion were respectively determined by radioimmunoassay(RIA), immunocytochemistry(ⅡC), situ hybridization and computed image pattern analysis. Results. The contents of AVP in SON, PVN were increased, and the AVP ir positive neurons in SON and PVN were also significantly increased as compared with the controls after ischemia and reperfusion. And there were very light staining of AVP ir positive neurons in the other brain areas such as suprachiasmatic nucleus (SC) and periventricular hypothalamic nucleus (PE), but these have no significant changes as compared with the controls. During different periods of cerebral ischemia (30～120 min) and reperfusion (30 min), AVP mRNA expression in SON and PVN were more markedly increased than the controls. Conclusions. The transcription of AVP gene elevated, then promoting synthesis and release of AVP in SON, PVN. Under the specific condition of cerebral ischemia and reperfusion, the activity and contents of central AVP increased abnormally is one of the important factors which causes ischemia brain damage.
基金Supported by Military Medical and Sanitation ResearchFund (01Z074)
文摘Objective： To explore the role of polymorphonuclear neutrophils （PMN） activation in lung injury following cardiopulmonary bypass （CPB）. Methods： Twenty four cases of patients with rheumatic heart disease were enrolled in this study to detect the situation of PMN activation and the degree of lung injury. Bronchoalveolar lavage fluid （BALF） and blood samples were collected just after anaesthesia and 4 h postoperatively. Related clinic data were recorded. Results： This cohort included 4 male and 20 female with age ranging from 29 to 69 years old, and body mass from 37 to 73 kg. Mean cardiopulmonary bypass time was （106.46±33.58） rain, mean cross clamp time was （77.58_＋28.02） rain, and mean mechanical ventilation time was （24.17±30.90） h. Postoperative PaO2/FiO2 decreased significantly than that during preoperation （P=0.000）. The postoperative WBC counts in peripheral blood and in BALF were both increased significantly than those during preoperation. And the postoperative rates of PMN in BALF were also increased significantly. Postoperative neutriphil elastase （NE） and myeloperoxidase （MPO） released from inflammatory ceils were increased significantly （P=0.000） both in plasma and BALF. The postoperative yon Willebrand factor （vWF） concentration in plasma was also increased significantly （P=0.000）. The postoperative concentration of sLPI in plasma was decreased, whereas it was increased significantly in BALF. Furthermore, there was a negative correlation between NE and PaO2/FiO2 both in BALF and in plasma. A negative correlation was present between vWF in plasma and PaO2/FiO2. A positive correlation was found between sLPI in plasma and PaO2/FiO2. Conclusion： PMN is recruited and activated after CPB and released large quantity of proteases, and lead to lung injury, sLPI is an important protective factor against inflammatory injury.
