ConA-谷氨酸相互作用:对其神经保护作用的新见解
Renato R Roma1, Fábio S A Oliveira2, Diógenes G S Fernandes3
1Department of Biochemistry and Molecular Biology, Federal University of Ceará, Fortaleza, CE, Brazil.
International journal of biological macromolecules
|April 25, 2025
概括
卡纳瓦利亚 ensiformis lectin (ConA) 在PC12细胞中表现出对L-谷氨酸激发毒性的神经保护作用. 氨基酸结合部位,而不是碳水化合物识别域,通过L-谷氨酸结介导这种保护.
科学领域:
- 神经科学是一个神经科学.
- 生物化学 生物化学
- 药理学 药理学是指药理学的学科.
背景情况:
- 酸是主要的激发性神经递质,其过量会导致与神经退行性疾病 (如阿尔茨海默氏症和帕金森病) 相关的激发性毒性.
- 有抗氧化和抗炎性质的植物性化合物正在探索神经保护.
- 卡纳瓦利亚 ensiformis 莱克 (ConA) 被用作中枢神经系统 (CNS) 研究中的模型莱克.
研究的目的:
- 调查CONA在体和体中的神经保护潜力,以防止谷氨酸刺激毒性.
- 为了确定特定的蛋白质域和Cona的神经保护作用背后的分子机制.
主要方法:
- 对PC12细胞进行了细胞毒性和神经保护测试,使用原生和非金属化Cona.
- 用分子对接和光谱学来分析ConA-氨酸相互作用.
- 进行了亲和和结合测试,以确定不同CONA域的作用.
主要成果:
- 在测试度范围 (1-50毫米) 中,ConA在PC12细胞中没有表现出细胞毒性.
- 康纳显著提高PC12细胞活力 (从80%增加到90%以上),当暴露在15.6μg/mL的谷氨酸刺激毒性时.
- 结合测试表明,氨基酸结合部位,而不是碳水化合物识别域,对于ConA的神经保护作用至关重要.
结论:
- ConA在PC12细胞中显示出显著的神经保护潜力,可以抵抗L-谷氨酸诱导的激发性毒性.
- 神经保护机制涉及通过ConA的氨基酸结合部位介导的L-谷氨酸分离.
- 这些发现凸显了Cona作为一种潜在的治疗药物,用于涉及谷氨酸刺激毒性的疾病.
相关概念视频
Ligand-Gated Ion Channel Receptor: Gating Mechanism
2.0K
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...
2.0K
Cognitive Enhancers: Cholinesterase Inhibitors and NMDA Receptor Antagonists
85
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.
85
Antiepileptic Drugs: Glutamate Antagonists
246
Glutamate is a fundamental neurotransmitter in the central nervous system, playing a vital role in neuronal communication and various cognitive processes. Glutamate stands as the principal excitatory neurotransmitter in the brain. Its presence is crucial for the communication between neurons, underpinning essential processes such as synaptic transmission, neuronal excitability, and plasticity. These functions are vital for higher-order cognitive processes, including learning and memory. The...
246
Indirect-Acting Cholinergic Agonists: Pharmacological Actions
557
Indirect-acting cholinergic agonists, also known as anticholinesterases, exert their pharmacological effects by enhancing cholinergic transmission in various body parts, including the neuromuscular junction, autonomic cholinergic synapses, and the brain.
At the neuromuscular junction, these agents work by inhibiting the breakdown of acetylcholine, allowing it to remain bound to the receptor and bind to nearby receptors. This process leads to repetitive firing of the endplate, causing muscle...
At the neuromuscular junction, these agents work by inhibiting the breakdown of acetylcholine, allowing it to remain bound to the receptor and bind to nearby receptors. This process leads to repetitive firing of the endplate, causing muscle...
557
Ligand-gated Ion Channels
12.0K
Ligand-gated ion channels are transmembrane proteins with a channel for ions to pass through and a binding site for a ligand. The channel opens only when a ligand attaches to the binding site.
Three Subfamilies of Ligand-gated Ion Channels
Ligand-gated ion channels fall into three subfamilies. The 'Cys-loop' includes the nicotinic acetylcholine receptors, γ-aminobutyric acid (GABA), glycine, and 5-hydroxytryptamine receptors. The second one is the 'Pore-loop' channels that...
Three Subfamilies of Ligand-gated Ion Channels
Ligand-gated ion channels fall into three subfamilies. The 'Cys-loop' includes the nicotinic acetylcholine receptors, γ-aminobutyric acid (GABA), glycine, and 5-hydroxytryptamine receptors. The second one is the 'Pore-loop' channels that...
12.0K
Alzheimer's Disease: Treatment
128
Alzheimer's Disease (AD), a neurodegenerative disorder, is pathologically identified by amyloid plaques and neurofibrillary tangles composed of tau protein. AD pharmacotherapy aims to manage cognitive symptoms, delay disease progression, and treat behavioral symptoms. The treatment is primarily symptomatic and palliative, with no definitive disease-modifying therapy available. Cholinesterase inhibitors, including donepezil (Aricept), rivastigmine (Exelon), and galantamine (Razadyne), are...
128


