How the Host Shapes its Microbiota (IMAGE) Cell Press Caption How the host shapes the microbiota is unclear. This visual abstract depicts the findings in Liu et al, who identify host miRNAs within feces and show that these miRNAs are predominantly produced by gut epithelial cells and Hopx+ cells. These microRNAs can regulate bacterial gene expression and growth, and their loss results in imbalanced microbiota and exacerbated colitis. Credit Liu et al./Cell Host & Microbe 2016 Usage Restrictions Credit Required. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.