【摘要】 目的探讨去势雌性大鼠海马区Tau蛋白Alzheimer样磷酸化的变化。方法建立大鼠双侧卵巢切除(OVX)模型,分别于术后1周、2周、3周、4周和8周取大鼠海马组织,Westernblot检测Tau蛋白的磷酸化程度。结果OVX组去势后4周和8周在海马区的PHF-1位点异常磷酸化Tau蛋白显著高于假手术组(P<001),而相同时间点和相同区域的Tau-1位点非磷酸化Tau蛋白的水平显著低于假手术组(P<001)。结论卵巢切除可导致雌性大鼠海马区Tau蛋白Alzheimer样过度磷酸化。更多还原

【Abstract】 AIM: To explore the effect of ovariectomization on Alzheimer-like phosphorylation of Tau in hippocampus of Sorague-Dawlery rats. METHODS: An animal model was developed using ovariectimized (OVX) rats, and the phosphorylation of Tau protein was measured by Western blot. RESULTS: The levels of phosphorylated Tau at PHF-1epitope were elevated in ovariectimized rat brain hippocampus 4 weeks and 8 weeks after ovariectomization, when compared with sham-OVX rats (P<0.05). On the other hand, the levels of non-phosphorylated Tau at Tau-1site were decreased in same brain regions at the same time point examined (P<0.05). No significant difference of phosphorylated Tau at those epitops was seen 1 week, 2 weeks, 3 weeks after ovariectomization between sham-OVX group and OVX group (P>0.05). CONCLUSION: Ovariectomization may induce Alzheimer-like hyperphosphorylation of Tau protein in brain hippocampus of rats. [更多还原