This article discusses the effects of estrogen on the expression of estrogen receptor （ER）, nerve growth factor （NGF）, and choline acetyltransferase （CHAT） in the cerebellum of rats. The model of aging female ra...This article discusses the effects of estrogen on the expression of estrogen receptor （ER）, nerve growth factor （NGF）, and choline acetyltransferase （CHAT） in the cerebellum of rats. The model of aging female rat was established to study the expression and distribution of ER, NGF, and ChAT in the cerebellum following 17β-estradiol treatment using the technique of immunohistochemical ultrasensitive SP in sprague-dawley rat. The immunoreactive productions were distributed in stratum Purkinje cell, nucleus dentatus, nucleus interpositus, and nucleus fastigii of cerebellum, and the ER positive production was mainly located in the plasma, cytoplasmic membrane, and neurite, and also existed in nucleus. The general tendency of the expression of ER, NGF, and ChAT positive production in the cerebellum cortex and nuclei of aging rat significantly decreases, while the intensity and quantity of the immunoreactive production ascends predominantly after 17β-estradiol treatment. Simultaneously, the positive neurite of Purkinje cell shows a similar tendency. The above- mentioned results suggest that the estrogen upregulates the expression of NGF and CHAT, and plays a vital role in sustaining and protecting the structure and function of cerebellum neurons. Furthermore, the similarity of their changing tendency implies that they were correlated and cooperated during the course in effect of estrogen on cerebellum. It also showed that the action of estrogen in cerebellum could be via genomic and nongenomic mechanism.展开更多
目的观察NGF、BDNF和NT3在A lzhe im er d isease(AD)大鼠海马中的分布及其表达变化。方法采用海马注射Aβ淀粉蛋白的方法建立AD模型。10 d后对大鼠进行灌注,取脑,冰冻切片,用NGF、BNDF和NT3抗体行免疫组织化学染色。对海马恒定视野内NG...目的观察NGF、BDNF和NT3在A lzhe im er d isease(AD)大鼠海马中的分布及其表达变化。方法采用海马注射Aβ淀粉蛋白的方法建立AD模型。10 d后对大鼠进行灌注,取脑,冰冻切片,用NGF、BNDF和NT3抗体行免疫组织化学染色。对海马恒定视野内NGF、BDNF和NT3的阳性细胞进行记数并进行统计学分析。结果AD组海马中的NGF阳性细胞较正常组显著增多(P<0.01),且染色增强。BDNF阳性细胞较正常组明显减少(P<0.01),染色强度减弱。而NT3的阳性细胞数及染色强度与正常组比较差异均没有统计学意义(P>0.05)。结论NGF、BDNF和NT3在AD的海马中发生了不同的变化,提示NGF、BDNF和NT3在AD中发挥了不同的作用,尤其是BDNF阳性细胞的减少可能与AD的神经功能减退有关。展开更多
文摘This article discusses the effects of estrogen on the expression of estrogen receptor （ER）, nerve growth factor （NGF）, and choline acetyltransferase （CHAT） in the cerebellum of rats. The model of aging female rat was established to study the expression and distribution of ER, NGF, and ChAT in the cerebellum following 17β-estradiol treatment using the technique of immunohistochemical ultrasensitive SP in sprague-dawley rat. The immunoreactive productions were distributed in stratum Purkinje cell, nucleus dentatus, nucleus interpositus, and nucleus fastigii of cerebellum, and the ER positive production was mainly located in the plasma, cytoplasmic membrane, and neurite, and also existed in nucleus. The general tendency of the expression of ER, NGF, and ChAT positive production in the cerebellum cortex and nuclei of aging rat significantly decreases, while the intensity and quantity of the immunoreactive production ascends predominantly after 17β-estradiol treatment. Simultaneously, the positive neurite of Purkinje cell shows a similar tendency. The above- mentioned results suggest that the estrogen upregulates the expression of NGF and CHAT, and plays a vital role in sustaining and protecting the structure and function of cerebellum neurons. Furthermore, the similarity of their changing tendency implies that they were correlated and cooperated during the course in effect of estrogen on cerebellum. It also showed that the action of estrogen in cerebellum could be via genomic and nongenomic mechanism.
文摘目的观察NGF、BDNF和NT3在A lzhe im er d isease(AD)大鼠海马中的分布及其表达变化。方法采用海马注射Aβ淀粉蛋白的方法建立AD模型。10 d后对大鼠进行灌注,取脑,冰冻切片,用NGF、BNDF和NT3抗体行免疫组织化学染色。对海马恒定视野内NGF、BDNF和NT3的阳性细胞进行记数并进行统计学分析。结果AD组海马中的NGF阳性细胞较正常组显著增多(P<0.01),且染色增强。BDNF阳性细胞较正常组明显减少(P<0.01),染色强度减弱。而NT3的阳性细胞数及染色强度与正常组比较差异均没有统计学意义(P>0.05)。结论NGF、BDNF和NT3在AD的海马中发生了不同的变化,提示NGF、BDNF和NT3在AD中发挥了不同的作用,尤其是BDNF阳性细胞的减少可能与AD的神经功能减退有关。
