调节性T细胞限制了与年龄相关的视网膜炎症和神经退行
María Llorián-Salvador1,2, Alerie G de la Fuente3,4,5, Christopher E McMurran6,7
1Wellcome-Wolfson Institute for Experimental Medicine, Queen's University Belfast, Belfast, Northern Ireland, BT9 7BL, UK.
Molecular neurodegeneration
|April 5, 2024
概括
调节性T细胞对于在衰老期间保持视网膜健康至关重要. 转移年轻的调节性T细胞可以逆转与年龄相关的视力丧失和视网膜退化.
科学领域:
- 免疫学 免疫学 免疫学
- 神经科学是一个神经科学.
- 眼科医生 眼科 眼科
背景情况:
- 衰老是视网膜退行性疾病的主要危险因素,如AMD和糖尿病视网膜病变.
- 调节性T细胞 (Tregs) 是神经系统免疫调节的关键,但它们在视网膜平衡和与年龄有关的疾病中的作用尚不清楚.
- 视网膜在历史上被认为是免疫特权,限制了对Treg功能的研究.
研究的目的:
- 研究调节性T细胞 (Tregs) 在衰老期间维持视网膜平衡中的作用.
- 确定Tregs是否可以预防或逆转与年龄相关的视网膜退化.
- 探索Tregs对与年龄相关的视力损失的潜在治疗应用.
主要方法:
- 在年轻和老年小鼠中选择性耗尽Tregs (FoxP3-DTR模型).
- 通过免疫光检测评估神经网膜退化,化和RPE形态.
- 通过将年轻和老Treg转移到老的Treg贫乏小鼠中,以评估神经保护.
主要成果:
- 在年轻和老老的小鼠中,Treg耗尽导致了RPE细胞变化和亚皮细胞积累.
- 老年小鼠,但不是年轻的小鼠,在Treg耗尽后表现出显著的神经退行症和化症.
- 收养转移年轻的Tregs,但不是老的Tregs,扭转了这些与年龄相关的视网膜变化.
结论:
- 调节性T细胞对于维持视网膜平衡和预防与年龄相关的神经退行至关重要.
- Tregs限制视网膜炎症,RPE/胆管损伤,以及光感受器在衰老中的损失.
- 基于Treg的疗法为与年龄有关的视网膜疾病提供了新的神经保护和抗炎策略.
相关概念视频
01:24T Cell Types and Functions
1.0K
When T cells with CD4 markers are activated, they give rise to two types of effector cells: helper T cells and regulatory T cells. Meanwhile, T cells with CD8 markers differentiate into effector cytotoxic T cells. The differentiation of CD4 T cells into helper T cell subsets, such as Th1, Th2, and Th17 cells, is dependent on the antigen type, antigen-presenting cell, and regulatory cytokines.
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
Th1 cells stimulate dendritic cells to express necessary co-stimulatory molecules on their surfaces for...
1.0K
01:22iPS Cell Differentiation
2.7K
The ability of induced pluripotent stem cells or iPSCs to differentiate into most body cell types has stimulated repair and regenerative medicine research over the past few decades. iPSC-derived blood cells, hepatocytes, beta islet cells, cardiomyocytes, neurons, and other cell types can repair injuries or regenerate damaged tissue in diseases such as diabetes and neurodegenerative disorders.
2.7K
01:28Inflammatory Response
2.0K
An inflammatory response is a localized, nonspecific immune reaction that occurs when a tissue is injured. It is characterized by redness, swelling, heat, and pain, which are commonly called the cardinal signs and symptoms of inflammation. Inflammation can sometimes result in a loss of function.
Inflammation can be triggered by various stimuli, such as impact, abrasion, chemical irritation, infections, and extreme hot or cold temperatures. These can damage cells and connective tissue fibers,...
Inflammation can be triggered by various stimuli, such as impact, abrasion, chemical irritation, infections, and extreme hot or cold temperatures. These can damage cells and connective tissue fibers,...
2.0K
01:37Neural Regulation
39.4K
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.
39.4K