摘要
目的:探究大麻素受体激动剂WIN55212-2(WIN)对脓毒症小鼠急性肺损伤(ALI)的影响,并探讨其通过糖酵解发挥作用的可能机制。方法:采用腹腔注射脂多糖(LPS)创建小鼠脓毒症ALI模型。将雄性C57BL/6J小鼠随机分为4组:对照(control)组、LPS组(腹腔注射10 mg/kg LPS)、LPS+WIN组(注射LPS前30 min腹腔注射1 mg/kg WIN)和LPS+WIN+MHY1485[哺乳动物雷帕霉素靶蛋白(mTOR)活化剂]组(LPS造模前1 d腹腔注射10 mg/kg MHY1485,并在造模前30 min腹腔注射1 mg/kg WIN和10 mg/kg MHY1485),每组6只。造模24 h后取材,计算肺指数;HE染色观察肺组织病理变化;ELISA检测肺组织炎症因子白细胞介素1β(IL-1β)和IL-10表达水平,以及血清乳酸和乳酸脱氢酶A(LDHA)水平;Western blot检测mTOR/缺氧诱导因子1α(HIF-1α)/6-磷酸果糖-2-激酶/果糖-2,6-双磷酸酶3(PFKFB3)信号通路相关蛋白水平。结果:相比于control组,LPS组小鼠肺指数增加,HE染色显示肺组织受损,肺组织中IL-10水平降低(P<0.05),IL-1β水平升高(P<0.05),血清乳酸和LDHA水平升高(P<0.05),磷酸化mTOR(p-mTOR)、HIF-1α和PFKFB3蛋白水平升高(P<0.05)。相较于LPS组,LPS+WIN组肺指数降低(P<0.05),HE染色显示肺组织受损减轻,肺组织IL-1β水平降低(P<0.05),IL-10水平升高(P<0.05),血清乳酸和LDHA水平降低(P<0.05),p-mTOR、HIF-1α和PFKFB3蛋白水平降低(P<0.05)。相较于LPS+WIN组,LPS+WIN+MHY1485组肺指数增加,HE染色显示肺组织受损,肺组织IL-1β水平升高(P<0.05),IL-10水平降低(P<0.05),血清乳酸和LDHA水平升高(P<0.05),p-mTOR、HIF-1α和PFKFB3蛋白水平升高(P<0.05)。结论:WIN55212-2可以减轻脓毒症小鼠ALI,其机制可能是通过调控mTOR/HIF-1α/PFKFB3信号通路,抑制糖酵解,减轻炎症反应。
AIM:To investigate the effects of cannabinoid receptor agonist WIN55212-2(WIN)on acute lung injury(ALI)in septic mice,and to explore its potential mechanisms through glycolysis.METHODS:A mouse model of septic ALI was established by intraperitoneal injections of lipopolysaccharide(LPS).Male C57BL/6J mice were randomly divided into 4 groups(n=6):(1)control group;(2)LPS group,receiving intraperitoneal injections of LPS at 10 mg/kg;(3)LPS+WIN group,receiving 1 mg/kg WIN intraperitoneally 30 min prior to LPS injection;(4)LPS+WIN+MHY1485[mammalian target of rapamycin(mTOR)activator]group,receiving 10 mg/kg MHY1485 intraperitoneally 1 d before LPS injection and 1 mg/kg WIN plus 10 mg/kg MHY148530 min before LPS injection.Tissues were collected 24 h after modeling for analysis.Lung indexes were calculated,and histopathological changes of lung tissues were observed via he matoxylin-eosin(HE)staining.Inflammatory cytokines interleukin-1β(IL-1β)and IL-10 in lung tissues,and lactic acid and lactate dehydrogenase A(LDHA)in serum were quantified using ELISA.The levels of mTOR/hypoxia-inducible fac tor-1α(HIF-1α)/6-phosphofructo-2-kinase/fructose-2,6-biphosphatase 3(PFKFB3)signaling pathway-related proteins were assessed by Western blot.RESULTS:Compared with control group,the LPS group exhibited an increased lung in dex,significant lung tissue damage,an increase in IL-1βlevels(P<0.05),a decrease in IL-10 levels(P<0.05),and el evated expressions of lactate and LDHA(P<0.05),along with increased levels of phosphorylated mTOR(p-mTOR),HIF-1αand PFKFB3 proteins(P<0.05).The LPS+WIN group showed improvements with a reduced lung index(P<0.05),lessened lung injury,decreased IL-1βlevels(P<0.05),increased IL-10 levels(P<0.05),and lower levels of lactic acid,LDHA,p-mTOR,HIF-1α,and PFKFB3(P<0.05).Conversely,the LPS+WIN+MHY1485 group displayed increased lung indexes and lung tissue damage,elevated IL-1βlevels(P<0.05),reduced IL-10 levels(P<0.05),and higher expressions of lactic acid,LDHA,p-mTOR,HIF-1αand PFKFB3(P<0.05)compared to the LPS+WIN group.CONCLUSION:WIN55212-2 mitigates sepsis-induced ALI,potentially by modulating the mTOR/HIF-1α/PFKFB3 sig naling pathway,thereby inhibiting glycolysis and alleviating inflammatory responses.
作者
段倩雯
董旭鹏
马源
刘澈
张铭
马玉清
DUAN Qianwen;DONG Xupeng;MA Yuan;LIU Che;ZHANG Ming;MA Yuqing(The First Clinical Medical College of Lanzhou University,Lanzhou 730000,China;Department of Anesthesiology,The First Hospital of Lanzhou University,Lanzhou 730000,China)
出处
《中国病理生理杂志》
CAS
CSCD
北大核心
2024年第3期521-526,共6页
Chinese Journal of Pathophysiology
基金
兰州市城关区科技项目(No.2021SHFZ0005)
兰州大学第一医院院内基金(No.ldyyyn2022-5)。
