CCL2中和性抗体对皮肤/肌肉切口牵拉模型大鼠机械性痛觉过敏及巨噬细胞功能的影响
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南部战区总医院院内科技计划项目(2021NZC029)


Effect of CCL2neutralizing antibodies on mechanical nociceptive sensitization and macrophage function in a skin/muscle incision retraction model in rats
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    摘要:

    目的 探究CCL2中和性抗体对皮肤/肌肉切口牵拉(SMIR)模型大鼠疼痛行为的影响,并研究其可能的作用机制。方法 32只SPF级SD大鼠分为假手术组、SMIR模型组、SMIR+IgG组和SMIR+CCL2中和性抗体组,每组8只。通过行为学测试评估各组大鼠的痛觉敏感性;采用RT-qPCR或免疫印迹检测背根神经节(DRG)中M1和M2型巨噬细胞标志物水平;通过糖酵解实验评估巨噬细胞代谢能力。结果 与假手术组相比,SMIR模型组大鼠术后患足的50%机械撤足阈值(MWT)降低(P<0.05),缩足持续时间明显延长(P<0.05),而应用CCL2中和性抗体能够改善这些行为学异常(P<0.05)。各组间热缩足潜伏期比较差异无统计学意义(P>0.05)。与假手术组相比,SMIR模型组大鼠的炎症相关基因CD80、iNOS和IL-12水平升高(P<0.05),同时,抗炎基因CD206、Arg1和IL-10水平明显降低(P<0.05);CCL2中和性抗体干预后,这些基因表达的异常变化均减弱(P<0.05)。另外,与假手术组相比,SMIR模型组巨噬细胞糖酵解代谢活性增强,其细胞外酸化率(ECAR)、ATP生成、葡萄糖摄取量及乳酸生成量均有明显升高(P<0.05);CCL2中和性抗体干预后,这些代谢指标降低(P<0.05)。结论 CCL2中和性抗体能有效缓解SMIR模型大鼠的机械性痛觉过敏,同时降低巨噬细胞糖酵解代谢活性,并调节炎症相关基因的表达

    Abstract:

    Objective To investigate the effect of CCL2 neutralizing antibody on pain behavior in skin/muscle incision and retraction (SMIR) model rats, and study the possible mechanism of action. Methods SD rats were divided into sham, SMIR model, SMIR+IgG and SMIR+CCL2 neutralizing antibody groups, with 8 rats in each group. The nociceptive sensitivity was assessed by behavioral tests; the levels of M1 and M2 type macrophage marker genes were confirmed by qRT-PCR or immunofluorescence in the dorsal root ganglion (DRG), and macrophage metabolic capacity was assessed by glycolytic assays. Results The 50% mechanical withdrawal threshold (MWT) of the affected foot was lower (P<0.05), and the duration of foot reduction (CPWL) was prolonged (P<0.05) in the rats in the SMIR model group postoperatively, whereas the application of CCL2-neutralizing antibody improved these behavioral abnormalities (P<0.05). There was no significant difference in heat-shrinking foot latency (PWL) between the groups (P>0.05). Besides, the levels of inflammation-related genes CD80, iNOS and IL-12 were increased (P<0.05), while the levels of anti-inflammatory genes CD206, Arg1 and IL-10 were decreased (P<0.05) in the rats of the SMIR model group. The aberrant changes in the expression of these genes were attenuated after the intervention of the CCL2-neutralizing antibody (P<0.05). Moreover, relative to the sham-operated group, the glycolytic metabolic activity of macrophages in the SMIR model group was enhanced, and their extracellular acidification rate (ECAR), ATP production, glucose uptake, and lactate production were elevated (P<0.05). These metabolic indexes were reduced after the intervention of the CCL2 neutralizing antibody (P<0.05). Conclusion CCL2 neutralizing antibody effectively alleviates mechanical nociceptive hypersensitivity in SMIR model rats while reducing macrophage glycolytic metabolic activity and regulating the expression of inflammation-related genes

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  • 在线发布日期: 2026-04-17
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