卡利斯塔丁通过降低谷氨胺合成酶的调节导致认知障碍
Yanlan Long1, Zhen Zhao1, Wanting Xie1
1Department of Biochemistry and Molecular Biology, Zhongshan School of Medicine, Sun Yat-sen University, Guangzhou, China.
Pharmacological research
|March 16, 2024
概括
卡利斯塔丁可以提高谷氨酸水平,从而损害阿尔茨海默氏症患者的认知功能.
科学领域:
- 神经科学是一个神经科学.
- 生物化学 生物化学
- 分子生物学分子生物学
背景情况:
- 谷氨酸兴奋毒性是阿尔茨海默氏症 (AD) 等神经退行性疾病的认知缺陷的基础.
- 在阿尔茨海默病患者中观察到SERPINA4 (卡利斯塔丁) 表达的升高,但其在谷氨酸-谷氨胺稳态中的作用尚不清楚.
研究的目的:
- 调查卡利斯塔丁在认知障碍和谷氨酸-谷氨酸循环调节中的作用.
- 阐明将卡利斯塔丁与认知功能障碍联系起来的分子机制.
主要方法:
- 利用转基因卡利斯塔丁 (KAL-TG) 的小鼠来评估认知功能和海马谷氨酸水平.
- 研究了卡利斯塔丁对谷氨胺合成酶 (GS) 乙化,无化和降解的作用.
- 研究了费诺纤维酸盐在改善认知缺陷方面的治疗潜力.
主要成果:
- 卡尔-TG小鼠表现出认知功能受损,海马谷氨酸水平升高,mEPSC频率增加.
- 发现卡利斯塔丁促进了GS lysine乙化和泛化,导致蛋白质体降解并降低了GS水平.
- 费诺纤维酸治疗通过减少血清卡利斯塔丁,改善了KAL-TG小鼠的认知记忆.
结论:
- 卡利斯塔丁通过促进GS降解来调节谷氨酸平衡,从而导致认知障碍.
- 向卡利斯塔丁,可能与费诺纤维酸盐,为阿兹海默症患者提供治疗策略,这些患者的卡利斯塔丁水平较高.
更多相关视频
08:16Caenorhabditis elegans as a Model System for Discovering Bioactive Compounds Against Polyglutamine-Mediated Neurotoxicity
Published on: September 21, 2021
3.4K
08:01LERLIC-MS/MS for In-depth Characterization and Quantification of Glutamine and Asparagine Deamidation in Shotgun Proteomics
Published on: April 9, 2017
8.1K
相关概念视频
Cognitive Enhancers: Cholinesterase Inhibitors and NMDA Receptor Antagonists
123
Cognitive enhancers, also known as "smart drugs," are substances used to enhance memory, mental alertness, and concentration. These can be natural or synthetic and improve cognition in conditions like Alzheimer's disease (AD) and other neurodegenerative diseases. Some common examples include caffeine, amphetamines, methylphenidate, modafinil, arecoline, donepezil, vortioxetine, and piracetam. These enhancers work on the principle of synaptic plasticity and altered circuit function.
123
Ligand-Gated Ion Channel Receptor: Gating Mechanism
2.2K
Ligand-gated ion channels are transmembrane proteins that play a vital role in intercellular communication and functions of the nervous system. They allow the influx of ions across the membrane once the neurotransmitter binds, allowing the subsequent transmission of electrical excitation across the neurons. Other ligand-gated ion channels, like the γ-aminobutyric acid (GABA) receptor, permit anions like chloride into the cells on the binding of the GABA molecule. Their entry into the cell...
2.2K
Long-term Depression
2.5K
Long-term depression, or LTD, is one of the ways by which synaptic plasticity—changes in the strength of chemical synapses—can occur in the brain. LTD is the process of synaptic weakening that occurs over time between pre and postsynaptic neuronal connections. The synaptic weakening of LTD works in opposition to synaptic strengthening by long-term potentiation (LTP) and together are the main mechanisms that underlie learning and memory.
Calcium Ion Concentration Mechanism
If over...
Calcium Ion Concentration Mechanism
If over...
2.5K
