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刺激性氨基酸载体支持炎症性巨细胞反应

Zhending Gan¹, Yan Guo¹, Muyang Zhao¹

¹State Key Laboratory of Swine and Poultry Breeding Industry, Guangdong Laboratory of Lingnan Modern Agriculture, College of Animal Science, South China Agricultural University, Guangzhou 510642, China.

Science bulletin

|April 13, 2024

概括

溶酶体中的激发性氨基酸载体2 (EAAT2) 调节了巨细胞的炎症. 骨髓细胞中EAAT2的枯竭减少了炎症反应,为II型糖尿病等疾病提供了潜在的治疗点.

科学领域:

免疫学免疫学免疫学
细胞生物学细胞生物学
神经科学是一个神经科学.

背景情况:

激发性氨基酸载体 (EAAT) 对神经递质调节至关重要,并与自身免疫性疾病有关.
在巨细胞中EAAT2的特定作用和亚细胞定位在很大程度上是未知的.
了解EAAT2在免疫细胞中的功能对于开发炎症病的治疗方法至关重要.

研究的目的:

阐明EAAT2在巨细胞中的功能和亚细胞局部.
研究EAAT2在炎症性巨细胞极化和激活中的作用.
探索EAAT2作为潜在的炎症性疾病和II型糖尿病的治疗点.

主要方法:

在巨细胞中通过NF-κB信号传递研究了LPS诱导的EAAT2表达.
评估EAAT2在巨细胞极化和mTORC1激活中的作用.
利用骨髓细胞特异性Slc1a2淘汰赛小鼠研究系统性炎症和饮食引起的肥胖症.
分析了II型糖尿病患者血液巨细胞中的 lysosomal EAAT2表达和mTORC1激活.

主要成果:

通过NF-κB信号传递,LPS刺激可以提高EAAT2 (Slc1a2) 表达的调节.
溶解体EAAT2对于炎症性巨细胞两极分化至关重要,它通过保持mTORC1通过谷氨酸/酸盐排泄和V-ATPase活性来激活mTORC1.
在全身炎症和肥胖的模型中,Slc1a2的髓状缩改善了炎症反应.
在II型糖尿病患者的巨细胞中观察到升高的溶酶体EAAT2和mTORC1激活.

结论:

通过调节氨基酸运输和炎症信号传递,EAAT2的 lysosomal 定位决定了免疫细胞的命运.
lysosomal EAAT2 是巨细胞炎症分化和激活的关键媒介.
针对EAAT2提供了一个有前途的治疗策略,用于炎症性疾病,包括II型糖尿病.

关键词:

亚斯巴酸盐是一种激发性氨基酸运输体的激发性氨基酸运输体谷氨酸酸盐的使用方法巨细胞是一个巨细胞.在 mTORC1 的情况下,mTORC1 是

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