摘要目的 分析红景天对蛛网膜下腔出血(SAH)后脑血管痉挛(CVS)大鼠炎症介质水平及血管内皮功能的影响.方法 将40只成年SD雄性大鼠随机分为假手术组、模型组、红景天低剂量组、红景天高剂量组各10只,除假手术组外,均采用枕大池二次注血法建立SAH后CVS大鼠模型,造模1～5d,模型组大鼠腹腔注射生理盐水,红景天高低剂量组分别经腹腔注射红景天5、10 mg/kg,5d后断尾取血测定血内皮素-1(ET-1)、白介素-6(IL-6)、肿瘤坏死因子-α(TNF-α)、环磷酸鸟苷(cGMP)水平,随后处死大鼠,取基底动脉进行HE染色,测定其直径,采用实时荧光定量聚合酶链式反应法(Real-time PCR法)测定基底动脉IL-6、白介素-1β(IL-1β)、血管内皮生张因子(VEGF)、内皮型一氧化氮合酶(eNOS)、诱导型一氧化氮合酶(iNOS) mRNA的表达.结果 (1)模型组、红景天低剂量组、红景天高剂量组基底动脉血管直径均低于假手术组(P＜0.05),红景天低剂量组、红景天高剂量组其基底动脉血管直径高于模型组(P＜0.05).(2)模型组、红景天低剂量组、红景天高剂量组的血ET-1、IL-6、TNF-α和基底动脉IL-6、IL-1β、iNOS的mRNA表达均高于假手术组,其血cGMP水平和基底动脉的VEGF、eNOS mRNA表达低于假手术组(P＜0.05),红景天高、低剂量组的血ET-1、IL-6、TNF-α水平和基底动脉IL-6、IL-1β、iNOS mRNA表达低于模型组,其血cGMP水平和基底动脉VEGF、eNOS mRNA表达高于模型组(P＜0.05).结论 红景天可降低SAH后CVS大鼠模型炎症反应表达,改善血管内皮功能,提升血管内皮生长因子表达.

abstractsObjective To investigate the effect of Rhodiola on levels of inflammatory mediators and vascular endothelial function in rats with cerebral vasospasm (CVS) after subarachnoid hemorrhage (SAH).Methods Forty adult male SD rats were randomly divided into the sham operation group, model group, low-dose Rhodiola group, and high-dose Rhodiola group, with 10 rats in each group.Except for the sham operation group, rat models of CVS after SAH were established by cisterna magna twice method.1-5 d after modeling, the model group were treated with intraperitoneal injection of normal saline.The low-dose and high-dose Rhodiola groups were injected with 5mg/kg and 10mg/kg of Rhodiola respectively.5 days later, docking was performed and blood was collected to determine the levels of serum endothelin-1 (ET-1), interleukin-6 (IL-6), tumor necrosis factor alpha (TNF-α), and cyclic guanosine monophosphate (cGMP).Then the rats were killed, and HE staining was performed to measure the diameter of basilar artery.The expression levels of basilar artery interleukin-6 (IL-6) mRNA, interleukin-1 β (IL-1 β) mRNA, vascular endothelial growth factor (VEGF) mRNA, endothelial nitric oxide synthase (eNOS), and inducible nitric oxide synthase (iNOS) were determined by real-time fluorescence quantitative polymerase chain reaction (RT-q-PCR).Results (1) The diameters of basilar arteries showed model group ＜ low-dose and high-dose groups ＜ the sham operation group (P ＜ 0.05).(2) The levels of ET-1, IL-6, TNF-α, IL-6 mR-NA, IL-1β mRNA and iNOS mRNA showed model group ＞ low-dose and high-dose Rhodiola groups ＞ the sham operation group while levels of cGMP, VEGF mRNA and eNOS mRNA showed model group ＜ low dose and high-dose Rhodiola groups ＜ the sham operation group (P ＜ 0.05).Conclusions Rhodiola can reduce the expressions of inflammatory reactions, improve the vascular endothelial function, and promote the expressions of vascular endothelial growth factor in rats with CVS after SAH.