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1.青海大学研究生院,西宁 810000
2.青海大学附属医院心血管内科,西宁 810000
刘红娟,Email: 904028020@qq.com 研究方向:心血管病学。
任 明 Email:1104234597@qq.com
收稿:2025-04-08,
修回:2025-05-22,
录用:2025-06-01,
纸质出版:2025-10-28
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刘红娟,杜娟,林玥,等.沙库巴曲缬沙坦对低氧性肺动脉高压右心室重构大鼠肠道菌群调控作用的宏基因组学分析[J].重庆医科大学学报,2025,50(10):1408-1417.
Liu Hongjuan,Du Juan,Lin Yue,et al.The regulatory effect of sacubitril/valsartan on intestinal microbiota in rats with right ventricular remodeling induced by hypoxic pulmonary hypertension: a metagenomics analysis[J].Journal of Chongqing Medical University,2025,50(10):1408-1417.
刘红娟,杜娟,林玥,等.沙库巴曲缬沙坦对低氧性肺动脉高压右心室重构大鼠肠道菌群调控作用的宏基因组学分析[J].重庆医科大学学报,2025,50(10):1408-1417. DOI: 10.13406/j.cnki.cyxb.003907.
Liu Hongjuan,Du Juan,Lin Yue,et al.The regulatory effect of sacubitril/valsartan on intestinal microbiota in rats with right ventricular remodeling induced by hypoxic pulmonary hypertension: a metagenomics analysis[J].Journal of Chongqing Medical University,2025,50(10):1408-1417. DOI: 10.13406/j.cnki.cyxb.003907.
目的
2
探究沙库巴曲缬沙坦(sacubitril/valsartan,LCZ696)对低氧性肺动脉高压(hypoxic pulmonary hypertension,HPH)右心室重构大鼠肠道菌群及其衍生代谢物血清指标的影响。
方法
2
24只雄性大鼠随机分为对照组(Control组)、低氧组(Hypoxia组)、沙库巴曲缬沙坦组(H-LCZ696组)。从第1天起,H-LCZ696组给予LCZ696灌胃,其余2组生理盐水灌胃,持续4周。实验结束后测定肺动脉压、心脏彩超和右心室重构等相关指标。病理染色及透射电镜观察组织结构。宏基因组学技术分析大鼠粪便肠道菌群特征及其功能注释。酶联免疫吸附试验(enzyme-linked immunosorbent assay,ELISA)法检测大鼠衍生代谢物血清指标。
结果
2
3组大鼠平均肺动
脉压(mean pulmonary arterial pressure,mPAP)差异有统计学意义(
F
=101.797,
P
<
0.001);与Control组相比,Hypoxia组mPAP升高、右心功能降低、肺血管重塑及右心室重构指标增加;与Hypoxia组相比,H-LCZ696组mPAP降低、右心功能改善、肺血管重塑及右心室重构指标降低。电镜结果显示Hypoxia组右心室心肌肌原纤维紊乱、线粒体肿胀,LCZ696干预后改善了上述超微结构损伤。宏基因组学分析显示,Hpoxia组肠道菌群多样性降低,致病菌(如变形菌门、普雷沃氏菌属、梭状芽孢杆菌)丰度升高,有益菌(如毛螺菌科属、乳杆菌属)减少,LCZ696干预后部分逆转上述变化:抑制梭菌目等致病菌增殖,但未能恢复菌群多样性,且部分有益菌(如乳杆菌属)丰度进一步降低。ELISA结果显示,与Control组相比,Hypoxia组血清促炎代谢物水平升高;与Hypoxia组相比,H-LCZ696组血清促炎代谢物水平降低。
结论
2
LCZ696可缓解HPH右心室重构,调控致病菌与血清促炎代谢物,以心血管疗效为主,菌群调控为辅。
Objective
2
To explore the effect of sacubitril/valsartan(LCZ696) on intestinal microbiota and serological parameters associated with its derived metabolites in rats with right ventricular remodeling due to hypoxic pulmonary hypertension(HPH).
Methods
2
A total of 24 male rats were randomly divided into Control group,Hypoxia group,and H-LCZ696 group. Since day 1,the rats in the H-LCZ696 group were given LCZ696 by gavage,while those in the other two groups were given normal saline by gavage,both for 4 consecutive weeks. Related indicators were measured after experiment,including hemodynamics,color Doppler ultrasound of right heart,and right ventricular remodeling. Histopathological staining and transmission electron microscopy were used to observe tissue structures; the metagenomics technique was used to analyze the characteristics and functional annotation of intestinal microbiota in the feces of the rats; ELISA was used to measure the serological parameters of the metabolites derived from intestinal microbiota.
Results
2
There was a significant difference in mean pulmonary arterial pressure(mPAP) between the three groups of rats(
F
=101.797,
P
=0.000). Compared with the Control group,the Hypoxia group had an increase in mPAP,a reduction in right ventricular function,and increases in th
e indicators for pulmonary vascular remodeling and right ventricular remodeling. Compared with the Hypoxia group,the H-LCZ696 group had a reduction in mPAP,an improvement in right ventricular function,and reductions in the indicators for pulmonary vascular remodeling and right ventricular remodeling. Transmission electron microscopy showed that the Hypoxia group had disordered myocardial myofibrils of the right ventricle and mitochondrial swelling,while such ultrastructural damage was improved after LCZ696 intervention. The metagenomics analysis showed that the Hypoxia group had a reduction in the diversity of intestinal microbiota,with increases in the abundance of pathogenic bacteria(such as Proteobacteria,Prevotella,and Clostridium) and reductions in the abundance of probiotic bacteria(such as Lachnospiraceae and Lactobacillus),and such changes were partially reversed after LCZ696 intervention,with inhibition of the proliferation of pathogenic bacteria such as Clostridiales,the failure to restore the diversity of intestinal microbiota,and a further reduction in the abundance of some probiotic bacteria(such as Lactobacillus). ELISA showed that compared with the Control group,the Hypoxia group had increases in the serum levels of pro-inflammatory metabolites,and compared with the Hypoxia group,the H-LCZ696 group had reductions in the serum levels of pro-inflammatory metabolites.
Conclusion
2
LCZ696 can alleviate right ventricular remodeling in HPH and regulate pathogenic bacteria and serum pro-inflammatory metabolites,with a main therapeutic effect on the cardiovascular system and a regulatory effect on intestinal microbiota.
2
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