目的 了解间歇式低氧对主动脉弓缩窄(transverse aortic constriction, TAC)模型小鼠肠道菌群的影响。方法 18只C57 BL/6雄性小鼠随机分为3组,假手术常氧组(C组),主动脉弓缩窄模型常氧组(TC组),主动脉弓缩窄模型低氧组(TH组),每组各6只。间歇式低氧的条件为氧浓度10.5%,每天8 h低氧,16 h常氧,交替进行,连续10 d。获取小鼠盲肠粪便中细菌DNA,经16 S rDNA测序检测小鼠盲肠粪便中微生物组成,应用微生物生态学定量观察进行生物信息学分析。结果 主动脉弓缩窄模型常氧组与假手术常氧组、主动脉弓缩窄模型低氧组相比,互营杆菌科显示出更低的丰度。TC组与C组比较差异有统计学意义(P=0.004),TC组与TH组比较P=0.013。结论 间歇式低氧处理使主动脉弓缩窄模型小鼠肠道菌群发生了改变,这种改变对主动脉弓缩窄的进程是否有影响仍需进一步研究。
Abstract
Objective To study the influence of intermittent hypoxia on transverse aortic constriction (TAC) of intestinal flora in a murine model.Methods Eighteen C57BL/6 mice were evenly and randomly divided into three groups: Group C, Group TC and Group TH. Twelve of these mice were subjected to transverse aortic constriction and six model mice to a pattern of intermittent hypoxia (8 h at 10.5% O2 and 16 h at room air) for 10 days. Twelve mice served as normoxic controls. Faecal samples were obtained and microbiome composition was determined by 16 S rDNA pyrosequencing and bioinformatics analysis by Quantitative Insights into Microbial Ecology.Results A lower abundance of Syntrophobacteraceae was detected in the normoxic-exposed transverse aortic constriction model mice than in controls.The difference between TC and C was of statistical significance (P=0.004), but was P=0.013 between TC and TH.Conclusion sIntermittent hypoxia can alter intestinal flora in a mouse model. Whether this change has influence on the progress of the transverse aortic constriction needs to be further studied.
关键词
间歇式低氧 /
主动脉弓缩窄 /
肠道菌群
Key words
intermittent hypoxia /
transverse aortic constriction /
intestinal flora
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