前突触终端完整性与帕金森病中的葡萄糖代谢有关
Weiyi Wang1, Yanru Wang2, Limin Xu3
1Department of Nuclear Medicine & PET Center, Huashan Hospital, Fudan University, Shanghai, 200040, China.
European journal of nuclear medicine and molecular imaging
|November 21, 2024
概括
帕金森病患者的突触密度降低,这与多巴胺载体水平和葡萄糖代谢有关. 突触密度部分调解了葡萄糖代谢和尾状核中多巴胺转运体的可用性之间的关系.
科学领域:
- 神经科学是一个神经科学.
- 放射化学 放射化学是指辐射化学.
- 代谢成像 - 代谢成像
背景情况:
- 帕金森病 (PD) 是一种神经退行性疾病,其特征是多巴胺能神经元的损失.
- 突触功能障碍越来越被认为是PD病变的早期事件.
- 了解突触损失,葡萄糖代谢和多巴胺转运体可用性之间的相互作用对于开发有效的治疗策略至关重要.
研究的目的:
- 研究帕金森病 (PD) 患者的突触密度,葡萄糖代谢和多巴胺转运体 (DAT) 可用性之间的关系.
- 评估[18F]SynVesT-1 PET作为PD中突触密度标记物的实用性.
- 探索突触密度在葡萄糖代谢和DAT可用性之间的关系中的调解作用.
主要方法:
- 对16名PD患者和11名健康对照组 (NCs) 进行了正子发射断层扫描 (PET) 成像.
- 使用的标志物包括[18F]SynVesT-1 (用于突触囊蛋白2A,SV2A),FDG (用于葡萄糖代谢) 和[18F]FP-CIT (用于DAT).
- 在特定的大脑区域,特别是尾状核中,分析了PET标记物摄入量和调解效应之间的相关性.
主要成果:
- 与NCs相比,PD患者在尾状核中的突触密度明显较低.
- 术后尾状体的突触密度降低与较低的DAT可用性和受损的葡萄糖代谢有很强的相关性.
- 突触密度部分介导了糖代谢和DAT可用性之间的关系,在后期的尾状体.
结论:
- [18F]SynVesT-1 PET有效地反映了突触密度,显示了对SV2A的特定结合.
- 在PD中观察到的[18F]SynVesT-1和[18F]FDG的代谢模式之间存在正相关性.
- 这些发现突显了在帕金森病中突触完整性,多巴胺功能和大脑代谢之间的复杂关系.
相关概念视频
Neural Regulation
39.1K
Digestion begins with a cephalic phase that prepares the digestive system to receive food. When our brain processes visual or olfactory information about food, it triggers impulses in the cranial nerves innervating the salivary glands and stomach to prepare for food.
39.1K
Parkinson's Disease: Overview
482
Neurodegenerative disorders are progressive diseases that cause irreversible damage and loss to neurons in specific brain areas. Examples of these disorders include Parkinson's disease, Alzheimer's disease, Multiple Sclerosis (MS), and Amyotrophic Lateral Sclerosis (ALS). These disorders share characteristics such as proteinopathies, selective neuronal vulnerability, and a complex interplay between genetic and environmental factors. The primary therapeutic goal for these conditions is...
482
Parkinson's Disease: Treatment
220
Neurodegenerative disorders, such as Parkinson's Disease (PD), involve the gradual and irreversible destruction of neurons in particular brain areas. These disorders exhibit standard features like proteinopathies, selective vulnerability of some neurons, and an interaction of intrinsic properties, genetics, and environmental influences in neural injury.
Parkinson's Disease is primarily a result of the loss of dopaminergic neurons in the substantia nigra pars compacta. The cornerstone of...
Parkinson's Disease is primarily a result of the loss of dopaminergic neurons in the substantia nigra pars compacta. The cornerstone of...
220
Glucose Homeostasis: Pancreatic Islets and Insulin Secretion
1.1K
The pancreatic islets comprising only 1%-2% of the volume are highly vascularized and innervated mini-organs. They contain five endocrine cell types, including β cells that secrete insulin, which is synthesized as a single polypeptide chain, preproinsulin, processed to proinsulin, and finally to insulin and C-peptide. This process is complex and regulated, involving the Golgi complex, the endoplasmic reticulum, and the secretory granules of the β cell.
Insulin and C-peptide are...
Insulin and C-peptide are...
1.1K
Excitatory and Inhibitory Effects of Neurotransmitters
9.8K
When an action potential reaches the presynaptic axon terminal, it releases neurotransmitters from the neuron into the synaptic cleft at a chemical synapse. The released neurotransmitter can be excitatory or inhibitory. The critical criteria commonly used to determine whether a molecule is a neurotransmitter at a chemical synapse are the molecule's presence in the presynaptic neuron. Second, its release is in response to strong presynaptic depolarization. And lastly, the presence of...
9.8K
Lysosomal Hydrolases
3.8K
Lysosomes are the site for the degradation of macromolecules and biological polymers released during membrane trafficking events such as secretory, endocytic, autophagic, and phagocytic pathways. The membrane-enclosed area of the lysosome, called the lumen, contains hydrolytic enzymes active in an acidic environment. These acid hydrolases are functional at a pH between 4.5 and 5 and are involved in cellular processes such as cell signaling, energy metabolism, restoration of the plasma membrane,...
3.8K


