[关键词]
[摘要]
【目的】探讨补阳还五汤对腰椎间盘突出症 (LDH) 大鼠的治疗作用及机制。 【方法】采用自体髓核移植法构建大鼠LDH 模型,建模后将大鼠随机分为模型组、补阳还五汤组、EX-527 (Sirt1抑制剂) 组、补阳还五汤+EX-527组,每组12只;另取 12只大鼠为假手术组。分组给药2周后,观察大鼠疼痛行为学,测定机械刺激缩足反射阈值 (MWT) 和热刺激缩足反射的潜 伏期 (PWTL) ,酶联免疫吸附分析 (ELISA) 检测血清疼痛因子5-羟色胺 (5-HT) 、神经肽Y (NPY) 和炎性因子肿瘤坏死因子α (TNF-α) 、白细胞介素 (IL) -1β、IL-6水平,苏木精-伊红 (HE) 染色法观察腰椎组织病理变化,Western Blot法检测腰椎组织 沉默信息调节因子1 (Sirt1) 、叉头框蛋白O3 (FOXO3) 、Wnt、β-连环蛋白 (β-catenin) 蛋白表达水平。 【结果】与假手术组比 较,模型组大鼠MWT、PWTL,血清5-HT水平,腰椎组织Sirt1、FOXO3蛋白水平降低,血清NPY、IL-6、IL-1β、TNF-α 水平和腰椎组织Wnt3a、β-catenin蛋白水平升高,差异均有统计学意义 (P<0.05) ,腰椎间盘内髓核细胞肿胀,髓核间界线 不清,纤维环局部撕裂、排列紊乱,炎性细胞浸润增加;与模型组比较,补阳还五汤组大鼠MWT、PWTL,血清5-HT水 平,腰椎组织Sirt1、FOXO3蛋白水平升高,血清NPY、IL-6、IL-1β、TNF-α水平和腰椎组织Wnt3a、β-catenin蛋白水平降 低,差异均有统计学意义 (P<0.05) ,腰椎间盘内髓核部分萎缩、紊乱,与纤维环边界尚清楚,纤维环结构尚完整,炎性细 胞浸润减轻。EX-527可加重LDH大鼠痛敏状态,减弱补阳还五汤对LDH大鼠的镇痛作用,差异均有统计学意义 (P<0.05) 。 【结论】补阳还五汤可抑制LDH大鼠炎性因子释放,提高大鼠疼痛阈值,改善痛敏状态,其作用可能是通过上调Sirt1,促进 FOXO3表达,抑制Wnt/β-catenin信号通路的激活实现的。
[Key word]
[Abstract]
Objective To investigate the therapeutic effects and mechanism of Buyang Huanwu Decoction (BYHWD) in rats with lumbar disc herniation (LDH) . Methods An LDH model was established in rats using autologous nucleus pulposus transplantation. After modeling,the rats were randomly divided into four groups (n = 12 each) : model group,BYHWD group,EX-527 (Sirt1 inhibitor) group,and BYHWD+EX-527 group,with an additional sham-operated group (n = 12) . After two weeks of treatment,pain behaviors were assessed by measuring mechanical withdrawal threshold (MWT) and paw withdrawal thermal latency (PWTL) . Serum levels of pain mediators (5-HT,NPY) and inflammatory cytokines (TNF-α,IL-1β,IL-6) were quantified via ELISA. Histopathological changes in lumbar tissues were evaluated by hematoxylin-eosin (HE) staining,while protein expression of Sirt1,FOXO3,Wnt,and β-catenin was detected by Western Blot. Results Compared with the sham group,the model group exhibited: decreased MWT,PWTL,serum 5-HT,and lumbar Sirt1/FOXO3 expression (P<0.05) ;elevated serum NPY,IL-6,IL-1β,TNF-α,and lumbar Wnt3a/β-catenin levels (P<0.05);and pathological features including swollen nucleus pulposus cells,blurred annular boundaries,torn/ disorganized collagen fibers,and increased inflammatory infiltration. Compared with the model group,BYHWD group exhibited increased MWT,PWTL,5-HT,and Sirt1/FOXO3 (P<0.05) ;reduced NPY,IL-6,IL-1β, TNF-α,and Wnt3a/β-catenin (P<0.05) ;and improved histopathology with partial nucleus pulposus atrophy, clearer annular borders,and reduced inflammation. EX-527 exacerbated hyperalgesia and attenuated BYHWD’ s analgesic effects (P<0.05), with statistically significance. Conclusion BYHWD alleviates inflammatory pain in LDH rats by upregulating Sirt1, enhancing FOXO3 expression, and suppressing Wnt/β -catenin pathway activation,thereby reducing cytokine release and improving pain thresholds.
[中图分类号]
R285.5
[基金项目]
武汉市中医药科研项目 (编号:WZ22A09)