首页|可溶性鸟苷酸环化酶刺激剂sGC003F对主动脉弓缩窄致小鼠慢性心力衰竭的改善作用及机制

可溶性鸟苷酸环化酶刺激剂sGC003F对主动脉弓缩窄致小鼠慢性心力衰竭的改善作用及机制

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目的 研究可溶性鸟苷酸环化酶刺激剂sGC003F改善慢性心力衰竭(CHF)小鼠心功能的作用及机制.方法 C57BL/6J雄性小鼠随机分为假手术组、主动脉弓缩窄诱导CHF模型组、模型+维立西呱(Ver,3 mg·kg-1)组(阳性对照)及模型+sGC003F(3和10 mg·kg-1)组.造模后4周开始ig给药,每天1次,持续28 d.采用超声系统测量小鼠心功能变化;ELISA检测血清N端前脑钠肽(NT-pro-BNP)、N端心房利钠肽前体(NT-pro-ANP)、可溶性鸟苷酸环化酶(sGC)和环鸟苷酸(cGMP)含量及炎症因子白细胞介素6(IL-6)、肿瘤坏死因子α(TNF-α)和IL-1β水平;HE和Masson染色法分别观察左心心肌组织病理改变和纤维化,并使用Image分析心肌纤维化面积;生化检测试剂盒检测心肌组织中超氧化物歧化酶(SOD)活性、丙二醛(MDA)含量及血清中一氧化氮(NO)含量;Western印迹法检测心肌组织磷酸化哺乳动物雷帕霉素靶蛋白(p-mTOR)、磷酸化蛋白激酶B(p-Akt)、TNF-α和IL-6蛋白表达水平.结果 与假手术组相比,模型组小鼠左室射血分数(LVEF)和左室短轴缩短率(LVFs)显著下降(P<0.01),心功能显著改变,心肌纤维化面积显著增加(P<0.05),血清NT-pro-BNP和NT-pro-ANP含量显著升高(P<0.01);与模型组相比,模型+Ver组和模型+sGC003F 3 mg·kg-1组上述指标均显著改善(P<0.05,P<0.01),模型+sGC003F 10 mg·kg-1组仅LVEF,LVFs和NT-pro-BNP有显著改善(P<0.01).与假手术组相比,模型组血清中NO,sGC和cGMP含量显著下降(P<0.05,P<0.01),模型+sGC003F 3 mg·kg-1组血清中NO,sGC和cGMP含量显著升高(P<0.01),模型+Ver和模型+sGC003F 10 mg·kg-1组血清仅cGMP含量显著提高(P<0.01).与假手术组相比,模型组小鼠血清TNF-α,IL-1β和IL-6水平显著升高(P<0.05,P<0.01);与模型组相比,模型+sGC003F 3 mg·kg-1组血清TNF-α,IL-1β和IL-6水平显著降低(P<0.05,P<0.01),模型+sGC003F 10 mg·kg-1组仅TNF-α水平显著降低(P<0.01).与假手术组相比,模型组SOD活性明显降低(P<0.01),MDA含量显著升高(P<0.01);与模型组相比,模型+sGC003F 3 mg·kg-1组SOD和MDA显著改善(P<0.05,P<0.01),模型+Ver组仅SOD活性显著升高(P<0.05),而模型+sGC003F 10 mg·kg-1组均无显著差异.Western印迹结果表明,模型组心肌组织p-mTOR,p-Akt,TNF-α和IL-6蛋白表达较假手术组显著升高(P<0.05);与模型组比较,模型+sGC003F 3 mg·kg-1组上述蛋白表达均显著下降(P<0.05,P<0.01),模型+sGC003F 10 mg·kg-1组和模型+Ver组TNF-α蛋白表达显著下降(P<0.01).结论 sGC003F可改善CHF模型小鼠心功能和心肌纤维化,其作用机制可能与抑制心肌氧化应激和炎症反应、调节NO/sGC/cGMP和Akt/mTOR信号通路有关.
Effects and mechanisms of soluble guanylate cyclase stimulator sGC003F on chronic heart failure induced by aortic arch constriction in mice
OBJECTIVE To investigate the effect and mechanism of soluble guanylate cyclase stimulator sGC003F on cardiac function in mice with chronic heart failure(CHF).METHODS C57BL/6J male mice were randomly divided into the sham operation(sham)group,transverse aortic constriction induced CHF mouse model group,model+veliciguat(Ver,3 mg·kg-1)group(positive control)and model+sGC003F(3 and 10 mg·kg-1)group.Four weeks after modeling,drugs were ig given,once a day,for 28 d.Echocardiography was used to measure the changes in cardiac function,and the myocardial hypertrophy related indexes were calculated.The levels of serum N-terminal pro-brain natriuretic peptide(NT-pro-BNP),N-terminal pro-atrial natriuretic peptide(NT-pro-ANP),soluble guanylate cyclase(sGC),cyclic guanosine monophosphate(cGMP)and inflammatory factors interleukin-6(IL-6),tumor necrosis factor-α(TNF-α)and IL-1β were detected by ELISA.The pathological changes of left heart tissue were observed with HE and Masson staining.Image was used to analyze the percentage of fibrosis in cardiac tissus stained with Masson.The activity of superoxide dismutase(SOD),content of malondialdehyde(MDA)in myocardial tissue,and level of nitric oxide(NO)in serum were detected by biochemical detection kits.The protein expression levels of p-mammalian target of rapamycin(p-mTOR),p-protein kinase B(p-Akt),TNF-α and IL-6 in cardiac tissue were detected by Western blotting.RESULTS Com-pared with the sham group,the left ventricular ejection fraction(LVEF)and left ventricular fractional shortening(LVFs)in the model group decreased significantly(P<0.01),the cardiac structure changed significantly,the percentage of myocardial fibrosis increased significantly(P<0.05),so were serum NT-pro-BNP and NT-pro-ANP levels(P<0.01).Compared with the model group,the above indexes of the model+Ver group and the model+sGC003F 3 mg·kg-1 group were significantly improved(P<0.05,P<0.01).The sGC003F 10 mg·kg-1 group had a significant improvement in LVEF,LVFs,and NT-pro-BNP(P<0.01).Compared with the sham group,the serum levels of NO,sGC and cGMP in the model group decreased significantly(P<0.05,P<0.01).Compared with the model group,the serum levels of NO,sGC and cGMP were significantly increased in the model+sGC003F 3 mg·kg-1 group(P<0.01),but only serum cGMP levels were significantly increased in model+Ver and model+sGC003F 10 mg·kg-1 groups(P<0.01).Compared with the sham group,the serum levels of TNF-α,IL-1β and IL-6 in the model group were significantly increased(P<0.05,P<0.01).Compared with the model group,the serum levels of TNF-α,IL-1β and IL-6 were significantly decreased in the model+sGC003F 3 mg·kg-1 group(P<0.05,P<0.01),and only the TNF-α level was significantly decreased in the model+sGC003F 10 mg·kg-1 group(P<0.01).Compared with the sham group,the SOD activity of the model group was significantly decreased(P<0.01),but the MDA content significantly increased(P<0.01).Compared with the model group,SOD and MDA were significantly improved in the model+sGC003F 3 mg·kg-1 group(P<0.05,P<0.01),but in the model+Ver group only the SOD activity significantly increased(P<0.05).Western blotting showed that the expressions of p-mTOR,p-Akt,TNF-α and IL-6 protein in myocardial tissue of the model group were significantly higher than in the sham group(P<0.05).Compared with the model group,the expressions of the above proteins in the model+sGC003F 3 mg·kg-1 group were significantly decreased(P<0.05,P<0.01),so were the expressions of TNF-α protein in the model+sGC003F 10 mg·kg-1 group and model+Ver group(P<0.01).CONCLUSION sGC003F can improve cardiac function,and reduce myocardial fibrosis in CHF model mice,which may be related to the inhibition of myocardial oxidative stress and inflammation,and the regulation of NO/sGC/cGMP and AKT/mTOR signaling pathways.

soluble guanylate cyclasesGC003Fchronic heart failureinflammation

成昕、李硕、张金水、石英贤、张杨、薛瑞、李劲草、董华进、郑志兵、张有志、王恒林

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河北北方学院研究生院,河北 张家口 075000

解放军总医院第六医学中心麻醉科,北京 100048

军事医学研究院国家安全特需药品全国重点实验室,北京 100850

可溶性鸟苷酸环化酶 sGC003F 慢性心衰 炎症

2025

中国药理学与毒理学杂志
军事医学科学院毒物药物研究所,中国药理学会,中国毒理学会

中国药理学与毒理学杂志

北大核心
影响因子:1.182
ISSN:1000-3002
年,卷(期):2025.39(1)