相关实验视频

Updated: May 16, 2025

Modified Yeast-Two-Hybrid System to Identify Proteins Interacting with the Growth Factor Progranulin

Modified Yeast-Two-Hybrid System to Identify Proteins Interacting with the Growth Factor Progranulin

Published on: January 17, 2012

过度表达的progranulin导致神经毒性而不是神经保护

Shinya Kusakari¹, Hiroaki Suzuki¹, Mikiro Nawa¹

¹Department of Pharmacology, Tokyo Medical University, Shinjuku-ku, Tokyo, Japan.

Neurobiology of disease

|April 3, 2025

概括

在小鼠中过度表达progranulin (PGRN) 导致神经毒性和认知缺陷,挑战前性痴呆症 (FTD) 的PGRN替代疗法. 最佳的PGRN水平对于神经元健康至关重要.

科学领域:

神经科学是一个神经科学.
遗传学是一个遗传学.
细胞生物学细胞生物学

背景情况:

前性痴呆症 (FTD) 是一种神经退行性疾病,与GRN基因的突变有关,该基因对progranulin (PGRN) 进行编码.
据信PGRN具有神经保护作用,这导致人们对旨在增加FTD治疗水平的疗法产生兴趣.
对于PGRN神经保护作用的精确机制及其过度表达的后果仍然不完全理解.

研究的目的:

为了研究活体中progranulin (PGRN) 的神经保护机制.
在转基因小鼠模型中评估野生类型和突变PGRN过度表达的影响.
评估与高PGRN水平相关的潜在神经毒性.

主要方法:

使用CAG促进体,生成过度表达野生类型人类PGRN和FTD致病突变体 (R432C-PGRN) 的转基因小鼠.
评估PGRN转基因小鼠的寿命,小脑功能,认知能力,结晶体,溶酶体异常和神经元损失.
使用培养细胞进行体外研究,以检查PGRN过度表达对内分泌网膜 (ER) 应激和亡的影响.

主要成果:

过度表达野生类型的人类PGRN导致寿命缩短,小脑功能障碍,包括普尔金尼细胞丧失,认知障碍,质症和溶酶体异常.
表达FTD引起R432C-PGRN突变的转基因小鼠也表现出FTD类型的表型,包括神经元损失,化和行为缺陷.
在培养细胞中,PGRN过度表达诱导了ER压力和细胞死亡.

结论:

持续增加的progranulin (PGRN) 表达,例如通过病毒载体或基因操纵,可以是神经毒性.
这些发现表明,前性痴呆症 (FTD) 的PGRN替代疗法应该旨在维持最佳PGRN水平,而不是简单地增加它们.
治疗策略必须考虑神经元类型和大脑区域特定的PGRN要求,以避免不良影响.

关键词:

在前性痴呆症.神经退行发生神经退行.神经元死亡的神经元死亡进子素 (PGRN) 是一种

更多相关视频

Establishment of a Surgically-induced Model in Mice to Investigate the Protective Role of Progranulin in Osteoarthritis

Establishment of a Surgically-induced Model in Mice to Investigate the Protective Role of Progranulin in Osteoarthritis

Published on: February 25, 2014

Modeling Neuronal Death and Degeneration in Mouse Primary Cerebellar Granule Neurons

Modeling Neuronal Death and Degeneration in Mouse Primary Cerebellar Granule Neurons

Published on: November 6, 2017

相关概念视频

Neural Regulation

Neural Regulation

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.

Abnormal Proliferation

Abnormal Proliferation

Under normal conditions, most adult cells remain in a non-proliferative state unless stimulated by internal or external factors to replace lost cells. Abnormal cell proliferation is a condition in which the cell's growth exceeds and is uncoordinated with normal cells. In such situations, cell division persists in the same excessive manner even after cessation of the stimuli, leading to persistent tumors. The tumor arises from the damaged cells that replicate to pass the damage to the...

GPCR Desensitization

GPCR Desensitization

G protein-coupled receptor (GPCR) signaling plays a crucial role in cell functioning. GPCR desensitization is an equally essential process. It allows cells to respond to changing environments and regain sensitivity to new stimuli while preventing unnecessary stimulation when no longer needed. Prolonged exposure to stimuli leads to GPCR desensitization. It involves blocking the receptors from binding and activating additional G proteins. This inhibits activation of downstream effectors, thereby...