Use of fecal microRNAs as biomarkers for probiotic administration

益生菌是通过食物或补充剂输送的有益微生物。尽管在理解益生菌特性的分子机制方面取得了重大进展，但缺乏可测量的益生菌摄入生物标志物阻碍了它们的充分利用。该项目的目的是鉴定粪便中的microRNA在摄入益生菌后的变化，从而可以用作生物标志物。粪便microRNA是调节基因表达的小分子，起源于肠上皮，并受到细菌暴露的影响。在这项研究中，我们将评估使用抗生素或不使用益生菌治疗的个体粪便miRNA的反应。选定的mirna将作为益生菌摄入量的候选生物标志物。这将有助于行业合作伙伴筛选和评估自己的益生菌。除了处于益生菌研究的前沿外，所产生的知识还将通过支持新的饮食指南使加拿大受益。

Probiotics are beneficial microorganisms delivered in foods or supplements. Despite significant progress in the understanding of the molecular mechanisms underlying probiotics properties, the lack of measurable biomarkers of probiotic intake hampers their full exploitation. The aim of this project is to identify fecal microRNA that change upon probiotic intake and could thus be used as biomarkers. Fecal microRNA are small molecules regulating gene expression that originate from the intestinal epithelium and are affected by bacterial exposure. In this study we will evaluate the response of fecal miRNA in individuals treated with antibiotics with or without probiotics. Selected miRNAs will be candidate biomarkers of probiotic intake. This will help the industry partner to screen and evaluate their own probiotics. The knowledge generated will also benefit Canada through supporting new dietary guidelines besides being at the forefront of probiotic research.