Lysophosphatidylcholine induced by fat transplantation regulates hyperalgesia by affecting the dysfunction of ACC perineuronal nets

IF 4.6 2区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES iScience Pub Date : 2024-11-05 DOI:10.1016/j.isci.2024.111274

Juan Li , Zhen Li , Yanbo Liu , Yijing Li , Yanqiong Wu , Anne Manyande , Zhixiao Li , Hongbing Xiang

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Abstract

The pathogenesis of hyperalgesia is complex and can lead to poor clinical treatment. Our study revealed that epididymal white adipose tissue (eWAT) from spared nerve injury (SNI) mice is involved in the occurrence of hyperalgesia after adipose tissue transplantation. We also showed that lysophosphatidylcholine (LPC) is enriched in the eWAT of SNI mice using non-targeted metabolomic analysis and verified that the levels of LPC in plasma and the anterior cingulate cortex (ACC) region increased following eWAT transplantation. Based on the immunohistochemistry results, we observed that LPC in the ACC region activated microglia via the TRPV1/CamkⅡ pathway. Meanwhile, the disruption of perineuronal nets (PNNs) around PV⁺ neurons in ACC promoted hyperalgesia, and the loss of PNNs and PV⁺ interneurons might be due to microglial phagocytosis. These findings elucidate the mechanism underlying hyperalgesia from the perspective of lipid metabolite LPC and PNNs and provide potential strategies for the treatment of hyperalgesia.

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脂肪移植诱导的溶血磷脂酰胆碱通过影响 ACC 神经元周围网的功能障碍来调节痛觉减退

痛觉减退的发病机制十分复杂，可能导致临床治疗效果不佳。我们的研究发现，幸免神经损伤（SNI）小鼠的附睾白色脂肪组织（eWAT）参与了脂肪组织移植后过痛的发生。我们还利用非靶向代谢组学分析表明，溶血磷脂酰胆碱（LPC）富集于SNI小鼠的eWAT中，并验证了eWAT移植后血浆和前扣带皮层（ACC）区域的LPC水平升高。根据免疫组化结果，我们观察到 ACC 区域的 LPC 通过 TRPV1/CamkⅡ 通路激活了小胶质细胞。同时，ACC中PV+神经元周围神经元网络（PNNs）的破坏促进了痛觉减退，而PNNs和PV+中间神经元的丢失可能是由于小胶质细胞的吞噬作用造成的。这些发现从脂质代谢物LPC和PNNs的角度阐明了痛觉减退的机制，并为治疗痛觉减退提供了潜在的策略。

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来源期刊

iScience Multidisciplinary-Multidisciplinary

CiteScore

7.20

自引率

1.70%

发文量

1972

审稿时长

6 weeks

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