目的探求青稞酥油饮食对小鼠肠道微生物分布及葡聚糖硫酸钠(DSS)诱导的小鼠慢性溃疡性结肠炎的影响。方法定制饮食,将标准鼠繁殖料(N鼠料)中的大豆油和玉米次粉替换为等比例的酥油和生青稞粉,以制成定制饲料(C鼠料)。将28只5周龄雄性小鼠随机分为4组,每组7只:1)NW组:饲养以N鼠料和水;2)ND组:饲养以N鼠料和1.8%DSS;3)CW组:饲养以C鼠料和水;4)CD组:饲养以C鼠料和1.8%DSS。以7 d 1.8%DSS溶液之后换10 d蒸馏水为1个周期,共进行3个周期完成建模。匹拉米洞法测定小鼠粪便隐血进行DAI评分,选取结肠组织HE染色及粪便微生物16S rRNA高通量测序。结果青稞酥油饮食可提高正常小鼠肠道菌群丰度,改善肠道菌群组成,其中别样棒菌属增加。加入DSS诱导溃疡性结肠炎模型后,青稞酥油饮食组DAI评分显著增高(P<0.05),组织学检测结肠黏膜糜烂溃疡且肠组织腺体排列混乱,小鼠肠道菌群丰度和多样性降低(P<0.05),但梭菌属、萨特氏菌属增加(P<0.05)。结论青稞酥油饮食可增加正常小鼠肠道菌群丰度,改善肠道菌群组成,但对于DSS诱导的慢性溃疡性结肠炎炎性反应无显著改善。
Objective To explore circulating biomarkers for screening the invasiveness of non-functioning pituitary adenomas(NF-PAs).Methods The exosomal RNAs were extracted from serum of patients with invasive NF-PA(INF-PA)or no...
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Objective To explore circulating biomarkers for screening the invasiveness of non-functioning pituitary adenomas(NF-PAs).Methods The exosomal RNAs were extracted from serum of patients with invasive NF-PA(INF-PA)or noninvasive NF-PA(NNF-PA).Droplet digital PCR was adapted to detect the mRNA expression of candidate genes related to tumor progression or invasion,such as cyclin dependent kinase 6(CDK6),ras homolog family member U(RHOU),and spire type actin nucleation factor 2(SPIRE2).Student’s t-test was used to analyze the statistical difference in the mRNA expression of candidate genes between the two *** operating characteristic(ROC)curve was used to establish a model for predicting the invasiveness of *** accuracy,sensitivity,specificity and precision of the model were then obtained to evaluate the diagnostic *** CDK6(0.2600±0.0912 vs.0.1789±0.0628,t=3.431,P=0.0013)and RHOU mRNA expressions(0.2696±0.1118 vs.0.1788±0.0857,t=2.946,P=0.0052)were upregulated in INF-PAs patients’serum exosomes as compared to *** CDK6,the area under the ROC curve(AUC)was 0.772(95%CI:0.600-0.943,P=0.005),the accuracy,sensitivity,specificity and precision were 77.27%,83.33%,75.00%and 55.56%to predict the invasiveness of *** RHOU,the AUC was 0.757(95%CI:0.599-0.915,P=0.007),the accuracy,sensitivity,specificity and precision were 72.73%,83.33%,68.75%and 50.00%.In addition,the mRNA levels of CDK6 and RHOU in serum exosomes were significantly positively correlated(r=0.935,P<0.001).After combination of the cut-off scores of the two genes,the accuracy,sensitivity,specificity and precision were 81.82%,83.33%,81.25%and 62.50%.Conclusions CDK6 and RHOU mRNA in serum exosomes can be used as markers for predicting invasiveness of *** of the two genes performs better in distinguishing INF-PAs from *** results indicate CDK6 and RHOU play important roles in the invasiveness of NF-PAs,and the established diagnostic method is valua
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