5-HT6R null mutatrion induces synaptic and cognitive defects.

5-HT6R null mutatrion induces synaptic and cognitive defects.
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5-HT6R 无效突变诱导突触和认知缺陷

DOI:
10.1111/acel.13369
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发表时间:
2021-06
期刊:
影响因子:
7.8
通讯作者:
Zhang Y
Zhang Y
中科院分区:
生物学1区
文献类型:
--
作者:
Sun Z;Wang B;Chen C;Li C;Zhang Y

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血清素 6 受体 (5-HT6R) 是多种人类疾病的有希望的靶标,例如阿尔茨海默病 (AD) 和精神分裂症。然而,中枢神经系统 (CNS) 中 5-HT6R 活性的详细机制尚不完全清楚。在本研究中,5-HT6R 无效突变 (5-HT6R−/−) 小鼠被发现表现出认知缺陷和异常焦虑水平。 5-HT6R 被认为特异性定位于初级纤毛。我们发现 5-HT6R 的丢失影响了初级纤毛中的 Sonic Hedgehog 信号通路。 5-HT6R−/− 小鼠表现出神经元形态的显着改变,包括树突复杂性和轴突初始段形态。缺乏 5-HT6R 的神经元表现出神经元兴奋性增加。我们的研究结果强调了 5-HT6R 在初级睫状体和神经元生理学中功能的复杂性,支持了这样的理论:该受体调节神经元形态和传递,并导致多种人类疾病(如 AD、精神分裂症和纤毛病)中的认知缺陷。阿尔茨海默病 (AD) 与突触形态变化、神经系统功能障碍和认知能力下降有关。 5-HT6R 的缺失会加剧小鼠的焦虑并降低学习和记忆能力。同时,在 5-HT6R 突变小鼠中发现纤毛信号传导、树突、突触可塑性和神经元兴奋性发生变化,表明 5-HT6R 在阻止 AD 进展方面具有潜在的治疗价值。
Serotonin 6 receptor (5‐HT6R) is a promising target for a variety of human diseases, such as Alzheimer's disease (AD) and schizophrenia. However, the detailed mechanism underlying 5‐HT6R activity in the central nervous system (CNS) is not fully understood. In the present study, 5‐HT6R null mutant (5‐HT6R−/−) mice were found to exhibit cognitive deficiencies and abnormal anxiety levels. 5‐HT6R is considered to be specifically localized on the primary cilia. We found that the loss of 5‐HT6R affected the Sonic Hedgehog signaling pathway in the primary cilia. 5‐HT6R−/− mice showed remarkable alterations in neuronal morphology, including dendrite complexity and axon initial segment morphology. Neurons lacking 5‐HT6R exhibited increased neuronal excitability. Our findings highlight the complexity of 5‐HT6R functions in the primary ciliary and neuronal physiology, supporting the theory that this receptor modulates neuronal morphology and transmission, and contributes to cognitive deficits in a variety of human diseases, such as AD, schizophrenia, and ciliopathies. Alzheimer’s disease (AD) is associated with changesin synaptic morphology, nervous system dysfunction, and cognitive decline. Lossof 5‐HT6R elevates anxiety and decreases learning and memory ability in mice.Meanwhile, changes in ciliary signaling, dendrites, synaptic plasticity, andneuronal excitability are found in 5‐HT6R mutant mice, suggesting that5‐HT6R has potential therapeutic value in impeding AD progression.
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期刊: DEVELOPMENT
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影响因子: 16.6
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