Influence of triptolide on neuronal apoptosis in rat with cerebral injury after focal ischemia reperfusion / 中国中药杂志

<p><b>OBJECTIVE</b>To study effect of triptolide (TL) on neuronal apoptosis in cerebral tissue of rat after ischemia-reperfusion.</p><p><b>METHOD</b>Triptolide at dose 0.2 or 0.4 mg x kg(-1) was intraperitoneally injected once a day for 4 d. The focal cerebral ischemia-reperfusion model was established with thread embolism in middle artery before triptolide injection on the fourth day. Neurological deficit score of rats was evaluated; and immunohistochemical techniques were used to count positive cells of express of MPO and TUNEL in cerebraltissue.</p><p><b>RESULT</b>Compared with the control group, the deficit of neural function was significantly improved, and the number of infiltrate of neutrophil and neuronal apoptosis in cerebral tissue was remarkably reduced in two TL-treated groups.</p><p><b>CONCLUSION</b>The results suggested that TL can inhibit infiltration of neutrophil and decrease the degree of neuronal apoptosis in cerebral tissue.</p>

A study of the relation between interval of the injury and the reaction of neurons, glial cells after experimental brain contusion / 法医学杂志

OBJECTIVE@#To observe the change of c-fos protein(Fos) and nerve growth factor receptor (NGFR) staining in the brain of rat after experimental brain contusion.@*METHODS@#Immunohistochemistry of c-fos and NGFR were applied to investigate the brain contusion.@*RESULTS@#(1) The expression of Fos protein could be observed at 0.5 h after injury and then increased with the prolonging of time. By 3 h after injury, the positive staining cells could be detected massively not only in and round the wound site but also in other areas of the whole ipsilateral cortex. The stains decreased 6-12 h later and could hardly be detected 1 d after the brain contusion. The control-experiment is negative. (2) NGFR positive staining cells could be found round the wound area 1 d postlesion. At 3 d following injury, a peak of massive positively stained cells appeared both in number and in intensity, showing significant differences compare with that of 1 d after damage (P < 0.01). 5 d later the positive express declined slowly. The express in the control-rat is negative.@*CONCLUSION@#There is a rule that the expression of Fos and NGFR positive staining changes with time going after brain contusion, which will be of great value in estimation of brain injury time. Detection of Fos can be used for time deduction in earlier period after injury, while NGFR in later period. They are also very important for distinguishing between antemortem or postmortem injury.