A role for gliotransmission in delayed neuronal death

描述（申请人提供）：星形胶质细胞释放一些胶质递质，调节突触可塑性和神经元兴奋性。星形胶质细胞通过释放谷氨酸和d -丝氨酸以钙依赖的方式激活神经元NMDA受体。NMDA受体的过度刺激导致兴奋性毒性神经元死亡。初步证据表明，癫痫持续状态（SE）导致星形细胞钙兴奋性的延长增加，这与SE诱导的神经元死亡在时间上相关。我将使用电生理技术以及双光子成像来询问胶质传递是否通过刺激NMDA受体导致se诱导的神经元死亡。这将有助于使用星形胶质细胞特异性诱导转基因，其中肌醇1,4,5三磷酸依赖的钙信号已经成为目标。星形胶质细胞在脑部疾病中的作用尚不清楚。本文提出的研究将为星形胶质细胞在癫痫中的作用提供更多的见解，并可能为许多其他脑部疾病，包括阿尔茨海默病，帕金森病，抑郁症和精神分裂症提供更多的见解。这些知识将使科学界能够设计针对这些疾病的新治疗方法。

DESCRIPTION (provided by applicant): Astrocytes release a number of gliotransmitters which modulate synaptic plasticity and neuronal excitability. Astrocytes activate neuronal NMDA receptors by releasing glutamate and D-serine in a calcium dependent fashion. Hyper-stimulation of the NMDA receptor results in excitotoxic neuronal death. Preliminary evidence indicates that status epilepticus (SE) results in a prolonged increase in astrocytic calcium excitability that is temporally correlated with SE-induced neuronal death. I will use electrophysiological techniques along with two-photon imaging to ask whether gliotransmission causes SE-induces neuronal death by stimulating the NMDA receptor. This will be facilitated by the use of astrocyte-specific inducible transgenic where inositol 1,4,5 triphosphate-dependent calcium signaling has been targeted. The role of astrocytes in brain disorders is poorly understood. The research propsed herein will give more insight to the role of astrocytes in epilepsy, and potentially, to many other brain disorders including Alzheimer's disease, Parkinson's disease, depression and schizophrenia. This knowledge will allow the scientific community to design novel treatments to target these disorders.