The model of this test was set up according to Langendoff isolated heart reperfusion mechanics. The experimental research was designed to observe the protective effects on ischemic andreperfuslon myocardial tissue by ...The model of this test was set up according to Langendoff isolated heart reperfusion mechanics. The experimental research was designed to observe the protective effects on ischemic andreperfuslon myocardial tissue by using ST. Thomas cardioplegic solution containing selenium andmagnesium. We conclude that using cold crystallold cardioplegic solution containing Se'+, Mg' 4 canobviously reduce ischemic and reperfusion myocardlal injury and bas an advantage of recovering myocardial runctlon after operation by observing the content or lactic dehydrogenase (LDH); creatineI,kasphoklnase CK in the coronary vessel's sinus reflux solutlonl glutatblone peroxldase (GPX); suI,eroxlde dismutase (SOD); maloydladehyde (MDA ) I Se4+ .Mg'+ .Ca'+ and cia-nging or myocardialultrastructure.展开更多
Disseminated intravascular coagulation (DIC) model of rabbits was made by the injectionof endotoxin. Cytochrome P-450 content and aniline hydroxylase activity in hepatocytic microsomes in DICrabbits were significantly...Disseminated intravascular coagulation (DIC) model of rabbits was made by the injectionof endotoxin. Cytochrome P-450 content and aniline hydroxylase activity in hepatocytic microsomes in DICrabbits were significantly reduced. The microviscosity of mitochondrial membrane was elevated, whilethe fluidity of the membrane, and the activities of calcium-magnesium-adenosine triphosphatase and calci-um-adenosine triphosphatase were reduced. Lipid peroxide and xanthine oxidase activities were in-creased. while superoxide dismutase and glutathione peroxidase activities were significantly decreased(P<0.05 or <0. 01) . The changes in the Reduqing test group were not prominent. and the parameters ofthe test group were close to those of the control group. This study suggests that in endotoxin induced DICrabbits the hepatocytic microsomes are injured. calcium homeostasis is disturbed and oxygen free radicalsare notably accumulated. Whereas Reduqing may have a protective effect on hepatocytic microsomestrom the injury, maintain calcium homeostasis and reduce oxygen free radicals in DIC rabbits.展开更多
The changes in content of Ca2 + and CaM, Ca2 + -ATPase activity and active oxygen metabolism during strawberry (Fragaria ananassa Duch. cv. Chunxing) fruits maturation and senescence were investigated in this study. T...The changes in content of Ca2 + and CaM, Ca2 + -ATPase activity and active oxygen metabolism during strawberry (Fragaria ananassa Duch. cv. Chunxing) fruits maturation and senescence were investigated in this study. The results showed that the soluble Ca2+ content and SOD activity in fruits tended to decline and O2 production rate to increase, the Ca2 + -ATPase activity peaked at first and then declined during fruits maturation and senescence. There were the highest CaM content at white stage in preharvest fruits and at marked senescence stage in postharvest ones. The above biochemical changes in fruits stored at low temperature (4℃)were slower than those stored at normal temperature(25℃). Thus, it indicated that the stimulation of calcium messenger system and accumulation of active oxygen free radical were closely related to fruits maturation and senescence.展开更多
文摘The model of this test was set up according to Langendoff isolated heart reperfusion mechanics. The experimental research was designed to observe the protective effects on ischemic andreperfuslon myocardial tissue by using ST. Thomas cardioplegic solution containing selenium andmagnesium. We conclude that using cold crystallold cardioplegic solution containing Se'+, Mg' 4 canobviously reduce ischemic and reperfusion myocardlal injury and bas an advantage of recovering myocardial runctlon after operation by observing the content or lactic dehydrogenase (LDH); creatineI,kasphoklnase CK in the coronary vessel's sinus reflux solutlonl glutatblone peroxldase (GPX); suI,eroxlde dismutase (SOD); maloydladehyde (MDA ) I Se4+ .Mg'+ .Ca'+ and cia-nging or myocardialultrastructure.
文摘Disseminated intravascular coagulation (DIC) model of rabbits was made by the injectionof endotoxin. Cytochrome P-450 content and aniline hydroxylase activity in hepatocytic microsomes in DICrabbits were significantly reduced. The microviscosity of mitochondrial membrane was elevated, whilethe fluidity of the membrane, and the activities of calcium-magnesium-adenosine triphosphatase and calci-um-adenosine triphosphatase were reduced. Lipid peroxide and xanthine oxidase activities were in-creased. while superoxide dismutase and glutathione peroxidase activities were significantly decreased(P<0.05 or <0. 01) . The changes in the Reduqing test group were not prominent. and the parameters ofthe test group were close to those of the control group. This study suggests that in endotoxin induced DICrabbits the hepatocytic microsomes are injured. calcium homeostasis is disturbed and oxygen free radicalsare notably accumulated. Whereas Reduqing may have a protective effect on hepatocytic microsomestrom the injury, maintain calcium homeostasis and reduce oxygen free radicals in DIC rabbits.
基金the National Natural Science Foundation of China ( No.30270933).
文摘The changes in content of Ca2 + and CaM, Ca2 + -ATPase activity and active oxygen metabolism during strawberry (Fragaria ananassa Duch. cv. Chunxing) fruits maturation and senescence were investigated in this study. The results showed that the soluble Ca2+ content and SOD activity in fruits tended to decline and O2 production rate to increase, the Ca2 + -ATPase activity peaked at first and then declined during fruits maturation and senescence. There were the highest CaM content at white stage in preharvest fruits and at marked senescence stage in postharvest ones. The above biochemical changes in fruits stored at low temperature (4℃)were slower than those stored at normal temperature(25℃). Thus, it indicated that the stimulation of calcium messenger system and accumulation of active oxygen free radical were closely related to fruits maturation and senescence.