摘要
目的:观察藏红花素能否缓解野百合碱(MCT)诱导动脉型肺动脉高压(PAH)大鼠的右心室损伤,并探讨其可能的作用机制。方法:40只雄性SD大鼠随机分为normal组、PAH组、crocin组及sildenafil组,每组10只。PAH组、crocin组及sildenafil组大鼠皮下注射MCT(50 mg/kg)建立PAH模型。自注射MCT之日起,crocin组大鼠给予藏红花素(200 mg/kg)、sildenafil组大鼠给予西地那非(30 mg/kg)、PAH组及normal组大鼠给予等量生理盐水每日1次灌胃。4周后,测定各组大鼠右心室收缩压(RVSP)、平均肺动脉压(mPAP)、右心室肥大指数(RVHI)和右心室质量指数(RVMI);组织染色观察右心室病理变化;检测右心室炎性因子(IL-1β、IL-6、TNF-α)、p38 MAPK/NF-κB炎性通路、CCL2、CCR2及巨噬细胞标记物CD68的表达。结果:与PAH组相比,crocin组及sildenafil组大鼠RVSP、mPAP、RVHI和RVMI降低(P<0.05);右心室炎症细胞浸润和胶原纤维增生不明显;p38 MAPK/NF-κB通路和炎性因子(IL-1β、IL-6和TNF-α)的表达下调(P<0.05);CCL2/CCR2通路表达及CD68+巨噬细胞浸润减少(均P<0.05)。结论:藏红花素可显著缓解MCT诱导PAH大鼠的右心室损伤,其作用与本实验剂量下西地那非的作用相当;藏红花素的部分保护机制可能与其对炎症的调节作用有关。
AIM:To investigate whether crocin alleviates right ventricular injury induced by monocrotaline(MCT)in rats with pulmonary arterial hypertension(PAH),and to explore the underlying mechanisms.METHODS:Forty male SD rats were randomly divided into 4 groups:normal group,PAH group,crocin group and sildenafil group,with 10 rats in each group.The rats in PAH,crocin and sildenafil groups received subcutaneous injection of MCT(50 mg/kg)to establish the PAH model.Starting from the day of MCT injection,the rats in crocin group received crocin(200 mg/kg),the rats in sildenafil group received sildenafil(30 mg/kg),and those in PAH and normal groups were orally gavaged with an equal volume of saline once daily.After 4 weeks,measurements of right ventricular systolic pressure(RVSP),mean pulmonary artery pressure(mPAP),right ventricular hypertrophy index(RVHI)and right ventricular mass index(RVMI)were taken for the rats in each group.Tissue staining was conducted to observe pathological changes in the right ventricle,and the expression levels of inflammatory factors(IL-1β,IL-6 and TNF-α),the p38 MAPK/NF-κB inflammatory pathway,CCL2,CCR2,and the macrophage marker CD68 were assessed.RESULTS:Compared with PAH group,the rats in crocin and sildenafil groups exhibited significant reductions in RVSP,mPAP,RVHI and RVMI(P<0.05).Right ventricular tissue displayed no evident infiltration of inflammatory cells or proliferation of collagen fibers.The down-regulation of the p38 MAPK/NF-κB pathway and inflammatory factors(IL-1β,IL-6 and TNF-α)was significant(P<0.05).Additionally,the CCL2/CCR2 pathway and the infiltration of CD68+macrophages were markedly decreased(P<0.05).CONCLUSION:Crocin effectively mitigates right ventricular damage in MCT-induced PAH rats,with its effica-cy comparable to that of sildenafil at the dosage utilized in this experiment.Some protective mechanisms of crocin may be attributed to its regulatory effects on inflammation.
作者
盛艳玲
宫小薇
李志娟
张旋
田涛
袁雅冬
SHENG Yanling;GONG Xiaowei;LI Zhijuan;ZHANG Xuan;TIAN Tao;YUAN Yadong(Department of Respiratory and Critical Care Medicine Huabei Petroleum Administration Bureau General Hospital,Renqiu 062552,China;Department of Respiratory and Critical Care Medicine The Second Hospital of Hebei Medical University,Shijiazhuang 050000,China)
出处
《中国病理生理杂志》
CAS
CSCD
北大核心
2024年第2期221-229,共9页
Chinese Journal of Pathophysiology
基金
河北省2021年度卫生健康创新专项项目(No.21377701D)。
