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一个神经免疫通路驱动细菌感染

Nian Wang^1,2,3, Jiao Liu⁴, Runliu Wu¹

¹Department of Surgery, UT Southwestern Medical Center, Dallas, TX 75390, USA.

Science advances

|May 2, 2025

概括

多巴胺通过通过DRD2.2.与TLR4相互作用来抑制败血症诱导的ACOD1表达. 这种神经免疫通路调节,针对多巴胺-ACOD1轴,为败血症提供了潜在的治疗策略.

科学领域:

神经免疫学神经免疫学
免疫代谢过程中的免疫代谢.
败血症病理生理学病理生理学

背景情况:

败血症对公众健康构成重大威胁,其神经免疫支柱尚不清楚.
ACOD1 (Aconitate decarboxylase 1) 是一种在细菌感染期间激活的免疫代谢调节剂.
神经递质在败血症引起的免疫反应中的作用在很大程度上仍未被探索.

研究的目的:

为了研究先天免疫细胞中ACOD1表达的神经递质调制.
阐明将多巴胺信号与败血症病理生理学联系起来的神经免疫机制.
评估向多巴胺-ACOD1轴在败血症中的治疗潜力.

主要方法:

对神经递质对其对脂聚糖 (LPS) 诱导的ACOD1表达的影响进行选.
研究多巴胺受体D2 (DRD2),托尔类受体4 (TLR4) 和下游信号通路 (MAPK3,CREB1) 之间的分子相互作用.
评估多巴胺激动剂 (pramipexole) 和抗剂 (aripiprazole) 对小鼠模型中败血症死亡率的影响,并分析患者数据.

主要成果:

多巴胺被确定为LPS诱导的先天免疫细胞中ACOD1表达的强有力的抑制剂.
DRD2与TLR4形成复合体,抑制TLR4-MYD88相互作用,随后发生ACOD1转录.
增强的ACOD1表达促进了CD274/PD-L1的产生,有助于败血症诱导的免疫抑制. 普拉米佩克索尔减轻了败血症致死率,而阿里皮普拉则加剧了这种情况.
多巴胺-ACOD1轴失调与患者的败血症严重程度相关.

结论:

通过DRD2传递多巴胺信号,可以负面调节ACOD1的表达和随后的免疫抑制.
多巴胺-ACOD1轴代表了毒症中关键的神经免疫通路.
用多巴胺激动剂准这一轴可能为败血症管理提供一种新的治疗策略.

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