Small David H
Laboratory of Molecular Neurobiology, Department of Biochemistry and Molecular Biology, Monash University, Victoria 3800, Australia.
Trends Neurosci. 2004 May;27(5):245-9. doi: 10.1016/j.tins.2004.03.006.
Studies on neural networks indicate that the pattern of amnesia that occurs in Alzheimer's disease (AD) can be reproduced by synaptic loss, but only when this loss is accompanied by synaptic scaling, a homeostatic mechanism that maintains the level of excitatory input on postsynaptic neurons. It is suggested that increased cholinergic activity during the early stages of AD contributes to synaptic scaling and that acetylcholinesterase inhibitors improve cognition in AD patients by boosting this mechanism.
对神经网络的研究表明,阿尔茨海默病(AD)中出现的失忆模式可通过突触丧失重现,但只有当这种丧失伴有突触缩放时才会如此,突触缩放是一种维持突触后神经元兴奋性输入水平的稳态机制。有人提出,AD早期胆碱能活性增加有助于突触缩放,并且乙酰胆碱酯酶抑制剂通过增强这一机制来改善AD患者的认知。