小中大
该课题比较有意思。
做casepase的话,建议进行活性检测,采用荧光试剂盒。用荧光分光检测,我们这里做过很多,稳定性太好了。可以这么说,我们做了很多方法。包括Tunel染色、Bax/BCL的western. casepase活性片段含量测定。我就感觉Tunel染色和casepase活性最能让我信服,其他的实验总是感觉没底。例如western,有时候有,有时候没有,可是Tunel染色和casepase活性我们几乎能达到90%,而且数据非常稳定。如果有什么困难,可以找我讨论。
这就是我们发表的文章摘要。
Brain Res. 2008 Feb 27;1196:151-6. Epub 2007 Dec 28. Links
Mechanism of hyperbaric oxygen preconditioning in neonatal hypoxia-ischemia rat model.Li Z, Liu W, Kang Z, Lv S, Han C, Yun L, Sun X, Zhang JH.
Department of Pathology, Weifang Medical College, Shandong, 261042, PR China.
Hypoxic ischemic (HI) injury in neonates damages brain tissues. We examined the mechanism of hyperbaric oxygen preconditioning (HBO-PC) in neonatal HI rat model. Seven-day-old rat pups were subjected to left common carotid artery ligation and hypoxia (8% oxygen at 37 degrees C) for 90 min. HBO (100% O(2), 2.5 atmospheres absolute for 2.5 h) were administered by placing pups in a chamber 24 h before HI insult. Brain injury was assessed by the survival rate, 2,3,5-triphenyltetrazolium chloride (TTC), Nissl, TUNEL straining and caspase-3,caspase-9 activities after HI. In HBO preconditioned animals, survival rate was increased, infarct ratio was decreased, and the positive stained TUNEL cells were reduced, accompanied by the suppression of caspase-3 and -9 activities. These results indicate that a single HBO-PC appears to provide brain protection against HI insult via inhibition of neuronal apoptosis pathways