首页> 外文期刊>Pharmacology, Biochemistry and Behavior >Peptide immunoreactivity in aged rat cortex and hippocampus as a function of memory and BDNF infusion.
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Peptide immunoreactivity in aged rat cortex and hippocampus as a function of memory and BDNF infusion.

机译:老年大鼠皮质和海马中的肽免疫反应性与记忆力和BDNF输注的关系。

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摘要

Brain-derived neurotrophic factor (BDNF) modulates neuropeptide levels in hippocampus and cortex of young adult rats. Neuropeptide levels are altered in some age-related disorders, such as Alzheimer's and Parkinson's Disease. BDNF may be able to rectify peptide abnormalities but, because plasticity decreases with age, BDNF may not alter peptide levels as readily in aged animals. To determine if BDNF would regulate peptide levels in aged rats, young, aged memory-impaired, and unimpaired rats were infused with BDNF or vehicle into hippocampus and cortex. Cell profile counts, cell profile areas, fiber counts, and/or fiber terminal densities were measured for sections immunostained for neuropeptide Y (NPY), somatostatin (SOM), cholecystokinin-8 (CCK), and dynorphin A(1-8) (DYN). Results showed that BDNF upregulated cortical NPY-immunoreactivity (ir) and SOM-ir, upregulated hippocampal NPY-ir, and downregulated hippocampal DYN-ir in both aged and young rats. In addition, BDNF significantly and selectively normalized the areas of atrophied deep cortical CCK-ir cell profiles in aged-impaired rats. Finally, decreased CCK-ir fiber density was found in the hippocampal formation of aged memory-impaired rats.
机译:脑源性神经营养因子(BDNF)调节年轻成年大鼠海马和皮层中的神经肽水平。在某些与年龄相关的疾病中,例如阿尔茨海默氏病和帕金森氏病,神经肽水平会发生变化。 BDNF可能能够纠正肽异常,但由于可塑性随着年龄的增长而降低,因此BDNF可能不会像在老年动物中那样轻易改变肽水平。为了确定BDNF是否会调节老年大鼠的肽水平,将幼小,老年记忆力受损和未受损的大鼠注入BDNF或运载体进入海马和皮层。测量了针对神经肽Y(NPY),生长抑素(SOM),胆囊收缩素8(CCK)和强啡肽A(1-8)免疫染色的切片的细胞谱计数,细胞谱面积,纤维计数和/或纤维末端密度。( DYN)。结果显示,BDNF在老年和幼年大鼠中均上调了皮质NPY免疫反应性(ir)和SOM-ir,上调了海马NPY-ir,并下调了海马DYN-ir。此外,BDNF显着选择性地标准化了衰老大鼠的萎缩性深皮质CCK-ir细胞分布区域。最后,在老年记忆障碍的大鼠海马结构中发现CCK-ir纤维密度降低。

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