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由Notch1介导的受损的嗅球神经发生有助于长期暴露于甲基胺的小鼠的嗅功能障碍
Cihang Gu1, Zhuo Wang2, Wenyu Luo1
1Guangzhou Key Laboratory of Forensic Multi-Omics for Precision Identification, School of Forensic Medicine, Southern Medical University, Guangzhou, 510515, China.
Cell biology and toxicology
|February 20, 2025
概括
长期的甲基胺 (甲基) 滥用会损害嗅觉功能,因为它会损害嗅觉球中的神经干细胞的更新和分化. 这种神经毒性与被破坏的自和异常的Notch1信号传递有关.
科学领域:
- 神经科学是一个神经科学.
- 毒理学 毒理学 毒理学
- 细胞生物学 细胞生物学
背景情况:
- 甲基胺 (Meth) 是一种具有显著神经毒性作用的兴奋剂药物.
- 慢性毒药物滥用会导致认知,记忆和感官缺陷,包括嗅觉功能障碍.
- 甲基诱导的嗅觉障碍背后的精确机制,特别是关于嗅觉球核神经发生的,尚未完全理解.
研究的目的:
- 通过检查嗅灯泡 (OB) 神经生成来研究甲基诱导的嗅觉障碍的机制.
- 阐明自和Notch1信号在Meth对神经干细胞 (NSCs) 在腹腔下区域 (SVZ) 的作用中的作用.
主要方法:
- 在老鼠中嗅觉功能和OB神经发生的评估,这些老鼠遭受了慢性Meth滥用.
- 亚腹腔区域 (SVZ) 神经干细胞 (NSC) 自更新和分化的分析.
- 在NSC中对自流量,Syntaxin 17 (Stx17) 表达和Notch1信号通路的研究.
主要成果:
- 在老鼠中,慢性吸毒会损害嗅觉功能.
- 甲基降低了NSC的自我更新,并促进了神经细胞分化,以牺牲SVZ中的神经元分化.
- 甲基通过降低Stx17的调节抑制了自细胞-溶酶细胞融合,减少了自细胞流量,导致Notch1降解受损和异常激活.
- 异常的Notch1信号改变了NSC命运决定,影响了OB神经发生.
结论:
- 甲基胺通过破坏嗅觉球中的神经发生来损害嗅觉功能.
- 自功能障碍和异常的Notch1信号传递是Meth诱导的嗅觉缺陷的关键机制.
- 这些发现为减轻甲基诱导的神经毒性和感官损伤提供了潜在的治疗点.
相关概念视频
03:14Notch Signaling Pathway
The Notch signaling pathway is a major intracellular signaling pathway that is highly conserved over a broad spectrum of metazoan species. It stands unique from other intracellular signaling mechanisms in animals because notch protein itself acts as the receptor as well as the primary signaling molecule.
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...
The Notch gene came into the limelight in 1914 after the discovery that its mutation in Drosophila melanogaster leads to a serrated (or "notched") wing margin phenotype. It was not until 1985...
01:03Olfactory Receptors: Location and Structure
The process of olfaction, also known as the sense of smell, is a sophisticated chemical response system. The specialized sensory neurons that facilitate this process, known as olfactory receptor neurons, are situated in an upper segment of the nasal cavity, known as the olfactory epithelium. Olfactory sensory neurons are bipolar, with their dendrites extending from the epithelium's apex into the mucus that lines the nasal cavity. Airborne molecules, when inhaled, traverse the olfactory...