一个由生长因子激活的溶酶体K道调节了帕金森病理
Jinhong Wie1, Zhenjiang Liu1, Haikun Song2
1Department of Biology, University of Pennsylvania, Philadelphia, PA, USA.
Nature
|January 28, 2021
概括
一个新发现的溶酶体K+通道,lysoKGF,通过TMEM175变体将生长因子与帕金森病风险联系起来. 它的功能障碍会损害神经元,加速α-synuclein的积累.
科学领域:
- 细胞生物学 细胞生物学
- 神经科学是一个神经科学.
- 遗传学 遗传学 是一个
背景情况:
- 溶解体是关键的器官,已知与帕金森病 (PD) 有关.
- 细胞外生长因子和细胞内溶酶体功能在PD病变发生过程中的通讯途径尚不清楚.
研究的目的:
- 研究细胞外信号调节 lysosomal 功能的机制.
- 为了确定 lysosomal K+通道复合体 (lysoKGF) 在帕金森病中的作用.
主要方法:
- 含有TMEM175和AKT的lysokGF复合物的表征.
- 对TMEM175变体 (rs34311866和rs3488217) 的分析及其对通道功能的影响.
- 评估神经元对压力的反应和与lysKGF功能相关的α-synuclein积累.
- 在小鼠模型中评估TMEM175缺乏以及在人类PD患者中进行关联研究.
主要成果:
- 发现了一种新型的溶酶体K+通道复合体,lysoKGF,由生长因子激活,由AKT封闭.
- 与PD风险相关的TMEM175变体 (rs34311866小等位基因) 减少了lysoKGF电流,导致神经元损伤和α-synuclein积累.
- 一种PD保护性TMEM175变体 (rs3488217小等位基因) 在饥饿期间增强了lysoKGF功能,从而赋予了神经元抵抗力.
- 在小鼠中,TMEM175缺乏导致多巴胺基神经元损失和运动缺陷.
结论:
- 细胞外生长因子通过lysKGF通道调节细胞内 lysosomal 功能.
- 常见的TMEM175变体代表了影响帕金森病风险的可向机制.
- 莱索KGF功能障碍是神经元脆弱性和PD病变发生的一个关键因素.
相关概念视频
Lysosomal Hydrolases
4.2K
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,...
4.2K
Parkinson's Disease: Overview
1.2K
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...
1.2K
Ligand-Gated Ion Channel Receptor: Gating Mechanism
3.4K
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...
3.4K
Neural Regulation
41.8K
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.
41.8K
Parkinson's Disease: Treatment
757
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...
757
Non-gated Ion Channels
7.7K
Ion channels are specialized proteins on the plasma membrane that allow charged ions to pass down their electrochemical gradient. Their main function is to maintain the membrane potential which is critical for cell viability. These channels are either gated or non-gated and can transport more than a thousand ions within milliseconds for the cellular event to occur.
Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism....
Compared to the gated ion channels, the non-gated channels, also known as leakage or passive channels, have no gating mechanism....
7.7K


