中文摘要:
循环单核细胞参与疼痛慢性化,但导致其部署的分子事件尚不清楚。使用痛觉过敏启动 (HP) 的小鼠模型,我们表明单核细胞通过一种机制使进展为慢性疼痛,该机制需要瞬时激活水解酶 N-酰乙醇胺酸酰胺酶 (NAAA),并随之抑制 NAAA 调节的脂质信号在过氧化物酶体增殖物激活受体α (PPAR-α)。在施用启动刺激后 72 小时内抑制 NAAA 可防止 HP。这种效应通过 NAAA 缺失进行表型复制,并依赖于 PPAR-α 的募集。CD11b 细胞(单核细胞、巨噬细胞和中性粒细胞)中缺乏 NAAA 的小鼠对 HP 诱导具有抗性。相反,在同一细胞中过表达 NAAA 或缺乏 PPAR-α 的小鼠是组成型引发的。单核细胞的耗竭/清除(荷兰Liposoma),而不是常驻巨噬细胞的耗竭/清除(荷兰Liposoma),产生了对 HP 难治的小鼠。结果确定单核细胞中 NAAA 调节的信号传导是诱导 HP 的控制节点,并可能转变为慢性疼痛。
英文摘要:
Circulating monocytes participate in pain chronification but the molecular events that cause their deployment are unclear. Using a mouse model of hyperalgesic priming (HP), we show that monocytes enable progression to pain chronicity through a mechanism that requires transient activation of the hydrolase, N-acylethanolamine acid amidase (NAAA), and the consequent suppression of NAAA-regulated lipid signaling at peroxisome proliferator-activated receptor-α (PPAR-α). Inhibiting NAAA in the 72 hours following administration of a priming stimulus prevented HP. This effect was phenocopied by NAAA deletion and depended on PPAR-α recruitment. Mice lacking NAAA in CD11b+ cells – monocytes, macrophages, and neutrophils – were resistant to HP induction. Conversely, mice overexpressing NAAA or lacking PPAR-α in the same cells were constitutively primed. Depletion of monocytes, but not resident macrophages(Liposoma), generated mice that were refractory to HP. The results identify NAAA-regulated signaling in monocytes as a control node in the induction of HP and, potentially, the transition to pain chronicity.
论文信息:
论文题目:NAAA-regulated lipid signaling in monocytes controls the induction of hyperalgesic priming in mice
期刊名称:Nature Communications
时间期卷:15, Article number: 1705 (2024)
在线时间:2024年2月24日
DOI:doi.org/10.1038/s41467-024-46139-5
产品信息:
货号:CP-005-005
规格:5ml+5ml
品牌:Liposoma
产地:荷兰
名称:Clodronate Liposomes and Control Liposomes
办事处:Target Technology(靶点科技)
慢性疼痛给全球数亿人带来了巨大的负担,但其机制基础在很大程度上仍然未知。一个主要挑战是识别允许急性疼痛发作(通常伴随着自我消退的局部组织损伤)发展为持续性疼痛状态的分子事件,这些状态比初始损伤更持久,并且可以辐射到其组织边界之外。除了神经可塑性变化(其作用已得到充分确立)之外,先天免疫系统的激活已成为慢性疼痛进展的驱动因素。例如,对小鼠的研究表明,血源性单核细胞浸润脊髓并与局部小胶质细胞协同作用,促进神经损伤后的疼痛慢性化。同样,表达 CX3CR1 受体的单核细胞和巨噬细胞通过与背根神经节(DRG)中的伤害感受神经元相互作用,导致关节炎疼痛和化疗诱导的异常性疼痛。尽管取得了这些进展,但在从急性疼痛到慢性疼痛的过渡过程中触发单核细胞衍生细胞部署的分子检查点仍然知之甚少。
氯膦酸盐二钠脂质体清除单核巨噬细胞,在痛觉过敏启动hyperalgesic priming (HP)模型中单核巨噬细胞功能研究,荷兰Liposoma巨噬细胞清除剂Clodronate Liposomes见刊于Nature Communications:
Liposoma巨噬细胞清除剂Clodronate Liposomes氯膦酸二钠脂质体的材料和方法: