ABSTRACT
Four hours after the spinal cord of rats was injured,the contents of malondi-aldehyde(MDA)and free fatty acid(FFA)were significantly increased,the activity of xan-thine oxidase(XOD)elevated,the activity of superoxide dismutase(SOD)reduced,and the calcium content significantly increased in the tissues of the injured cord.These facts suggest that there is the generation of calcium-mediated free radicals and lipid peroxidation in the membrane.Intravenous injection of saponins of Panax notoginseng(PNS)in the dosage of 30,90,and 270mg/kg could all inhibit the production of MDA; 270mg/kg could inhibit the release of FFA and the activity of XOD;90mg/kg could significantly decrease the calcium content.These findings indicate that the inhibition of PNS on the calcium influx might be one of the mechanisms of anti-lipid peroxidation in spinal cord injury in rats.
ABSTRACT
The effects of thyrotropin releasing hormone (TRH) on lipid peroxidation in spinal cord injury in rats were studied. It was found that TRH (0.2 mg/kg, 0.6mg/kg, 2.0mg/kg bolus, followed by the same doses/h over 4 h, iv) could inhibit lipid peroxidation of the injuried spinal cord, decrease malondialdehyde (MDA)production and significantly increase superoxide dismutase (SOD) activity in a dose-dependent manner. The results indicate that the antioxidant effects of TRH are the result of increase of SOD activity. TRH might be an effective free radical scavenger.
ABSTRACT
Dexamethasone(Dex) was injected with 3 doses(0.5, 1.0, 2.0mg/kg) into the carrageenan-induced inflamed peritoneal cavity of rats. It was found that the peak a id kinetics of neutrophil (Neu) phagocytic chemoluminescence were depressed, the superoxide anion production was reduced (P
ABSTRACT
It was found that citrated rabbit blood in a test tube could be coagulated within 5 seconds after the addition of isobutyl ?-cyanoacrylate.isoamyl ?-cyanoacrylate and isobutyl ?-cyanoacrylate glycolate in different concentrations respectively.All these monomers exhibited quick and reliable styptic effect on the hemorrhage of the liver,the spleen and the kidneys of rabbits and rats respectively,and their styptic effect was superior to that of most conventional hemostatics.The test for their acute toxicity revealed that they were of quite low toxicity and their dosage for adhesive-hemostatic purpose was about one gram.There was no evident injurious effect on the functions of the kidneys and the liver and the peripheral hemogram in rabbits.The test for subacute toxicity revealed no obvious pathological changes but some imflammatory responses over the site of drug application.