Crt-miR166a, a Citrus-Derived MicroRNA, Modulates the Gut Microbiota-Metabolites under High-Fat Diet.
Zhan M, Zhao C, Chen B, Han Y, Song M
Plant Signaling
Citrus peels and juice you compost or discard carry microscopic molecular signals that, even after digestion, may be quietly steering the bacteria living in your gut toward healthier metabolic outputs.
Scientists found that a tiny signaling molecule naturally produced by citrus plants — the kind you'd find in oranges or lemons — can change which bacteria live in the gut when someone eats a lot of fatty food. In mice fed a high-fat diet, this citrus molecule boosted helpful bacteria and increased beneficial compounds those bacteria produce, including ones linked to better digestion and a calmer gut. It also nudged the gut toward making more of certain protective substances derived from the amino acid found in turkey and seeds.
Key Findings
Crt-miR166a significantly increased the abundance of beneficial gut bacteria, including Bacteroides and Acetatifactor, in high-fat diet-fed mice.
The citrus microRNA elevated levels of three short-chain fatty acids — acetic acid, butyric acid, and valeric acid — which are key fuels for gut-lining cells and markers of microbiome health.
Crt-miR166a promoted production of three tryptophan-derived indole compounds (indole-3-aldehyde, indole-3-propionic acid, indole-3-acetamide) while reshaping bile acid profiles, both linked to reduced gut inflammation.
chevron_right Technical Summary
A tiny molecule found in citrus fruit can reshape the gut's bacterial community and improve metabolic health in mice eating a high-fat diet, suggesting that compounds in everyday citrus foods may actively guide which microbes thrive in our digestive systems.
Abstract Preview
High-fat diet (HFD) induces dysregulation of gut microbiota-derived metabolites, including short-chain fatty acids, bile acids, and indole derivatives. Although microRNAs (miRNAs) are known to regu...
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Citrus is a genus of flowering trees and shrubs in the family Rutaceae. Plants in the genus produce citrus fruits, such as citrons, mandarins, and pomelos. Many important citrus crops have been developed through extensive hybridization, including oranges, lemons, grapefruits, and limes, all of wh...