NEUROTROPHIN REGULATION OF GLUTAMATE RECEPTORS

描述(摘自申请人的摘要)： 神经营养因子在神经发育中起着关键作用。 系统通过促进神经元存活和分化。这些因素 也与潜在的病理生理机制有关 阿尔茨海默氏症和其他神经退行性疾病。在细胞水平上， 神经营养因子在调节突触传递中的动态作用 在海马体中，一种特别感兴趣的大脑结构，因为 它在学习和记忆过程中的拟议作用以及它的 有选择性地易受伤害。这项研究项目使用 表征分子靶标的电生理学方法 神经营养素诱导的突触背后的信号级联 可塑性。 最近的证据已经证明了特定的生化效应 TrkB激活介导神经营养因子对谷氨酸受体的影响 突触后膜上的酪氨酸激酶受体。建议数 研究将考察这些小说的生理背景 神经营养因子效应。建议的研究将检视 这些新的神经营养因子效应的生理背景，聚焦 特别是谷氨酸受体活性的功能调节。 最初的实验使用神经元培养和膜片钳记录 描述通道动力学的调节并阐明潜在的 蛋白激酶信号传递级联。以后的研究将探索 神经营养因子在更复杂的细胞环境中的调节 海马片，研究神经营养因子在突触中的作用 可塑性和神经元-神经胶质细胞的相互作用。这些研究将 有助于更广泛地了解神经营养素在心脏疾病中的作用 脑，在神经发生方面具有潜在的治疗应用 疾病。

DESCRIPTION (from applicant's abstract): Neurotrophins play critical roles in the development of the nervous system by promoting neuronal survival and differentiation. These factors have also been implicated in the pathophysiologic mechanisms underlying Alzheimer's and other neurodegenerative diseases. At the cellular level, neurotrophins play a dynamic role in modulating synaptic transmission in the hippocampus, a brain structure of particular interest because of its proposed role in learning and memory processes as well as its selective vulnerability to injury. This research project uses electrophysiological approaches to characterize the molecular targets and signaling cascades underlying neurotrophin-induced synaptic plasticity. Recent evidence has demonstrated specific biochemical effects of neurotrophins on glutamate receptors, mediated by activation of trkB tyrosine kinase receptors in postsynaptic membranes. The proposed studies will examine the physiological context of these novel neurotrophin effects. The proposed studies will examine the physiological context of these novel neurotrophin effects, focusing specifically on functional modulation of glutamate receptor activity. Initial experiments use neuronal cultures and patch-clamp recordings to characterize the regulation of channel kinetics and elucidate underlying protein kinase signaling cascades. Later studies will explore neurotrophin modulation within the more complex cellular environment of hippocampal slices, investigating the roles of neurotrophins in synaptic plasticity and neuronal-glial interactions. These studies will contribute to a broader understanding of neurotrophin action in the brain, with potential therapeutic applications in neurogenerative disease.