安杰尔曼综合征模型小鼠突触可塑性的改变可通过 5-HT7R 刺激得到缓解。

IF 6.7 2区 医学 Q1 NEUROSCIENCES
Amelia Pizzella , Eduardo Penna , Yan Liu , Natalia Abate , Enza Lacivita , Marcello Leopoldo , Carla Perrone-Capano , Marianna Crispino , Michel Baudry , Xiaoning Bi
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引用次数: 0

摘要

安杰尔曼综合征(AS)是一种严重的神经发育障碍,以运动功能障碍、癫痫发作、智力障碍、语言障碍和类似自闭症的行为为特征,与自闭症谱系障碍(ASD)有很高的合并率。众所周知,刺激血清素受体 7(5-HT7R)可以挽救脆性 X 和雷特综合征(与 ASD 相关的两种病症)动物模型的一些行为和神经可塑性功能障碍。鉴于这些观察结果,我们假设 5-HT7R 信号的改变也可能与 AS 有关。为了验证这一假设,我们用选择性激动剂 LP-211 刺激 5-HT7R,研究其对 AS 小鼠模型中突触功能障碍和行为改变可能产生的有益影响。在突变小鼠中,我们观察到蛋白质合成的突触机制受损,而 5-HT7R 的激活可逆转这种情况。此外,刺激 5-HT7R 还能:i) 增强 AS 小鼠海马神经元树突棘密度(AS 小鼠的树突棘密度降低);ii) 恢复 AS 小鼠海马切片受损的长期电位(LTP);iii) 改善突变动物在恐惧条件反射范式下的认知能力。总之,我们的研究结果表明,刺激5-HT7R对恢复强直性脊柱炎相关的分子和认知缺陷有益,这表明以5-HT7R为靶点可能是治疗该病症的一种很有前景的方法。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Alterations of synaptic plasticity in Angelman syndrome model mice are rescued by 5-HT7R stimulation
Angelman syndrome (AS) is a severe neurodevelopmental disorder characterized by motor disfunction, seizures, intellectual disability, speech deficits, and autism-like behavior, showing high comorbidity with Autism Spectrum Disorders (ASD). It is known that stimulation of the serotonin receptor 7 (5-HT7R) can rescue some of the behavioral and neuroplasticity dysfunctions in animal models of Fragile X and Rett syndrome, two pathologies associated with ASD. In view of these observations, we hypothesised that alterations of 5-HT7R signalling might also be involved in AS. To test this hypothesis, we stimulated 5-HT7R with the selective agonist LP-211 to investigate its possible beneficial effects on synaptic dysfunctions and altered behavior in the AS mice model. In mutant mice, we observed impairment of the synaptic machinery of protein synthesis, which was reversed by 5-HT7R activation. Moreover, stimulation of 5-HT7R was able to: i) enhance dendritic spine density in hippocampal neurons, which was reduced in AS mice; ii) restore impaired long-term potentiation (LTP) in hippocampal slices of the AS mice; iii) improve cognitive performance of the mutant animals subjected to the fear conditioning paradigm. Altogether, our results, showing beneficial effects of 5-HT7R stimulation in restoring molecular and cognitive deficits associated with AS, suggest that targeting 5-HT7R could be a promising therapeutic approach for the pathology.
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来源期刊
Progress in Neurobiology
Progress in Neurobiology 医学-神经科学
CiteScore
12.80
自引率
1.50%
发文量
107
审稿时长
33 days
期刊介绍: Progress in Neurobiology is an international journal that publishes groundbreaking original research, comprehensive review articles and opinion pieces written by leading researchers. The journal welcomes contributions from the broad field of neuroscience that apply neurophysiological, biochemical, pharmacological, molecular biological, anatomical, computational and behavioral analyses to problems of molecular, cellular, developmental, systems, and clinical neuroscience.
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