Ultrasound-powered nanoparticle calms gut inflammation in mice
Zhao S, Zhang J, Li X, Cui Y, Cheng P
Medicinal Plants
The tannic acid in this treatment, the same plant compound found in tea leaves, oak galls, and pomegranate rind, turns out to be the key ingredient that makes the whole reaction cycle work.
Researchers made a microscopic particle out of bismuth and cerium that gets switched on by ultrasound waves, and it uses a plant chemical called tannic acid to keep recycling itself as it destroys harmful oxygen molecules in an inflamed gut. In mice and lab tests, this reduced intestinal inflammation, helped repair the gut lining, and restored a healthier balance of gut bacteria.
Key Findings
Ultrasound activation of the bismuth core drives electron-hole separation across the Janus Bi@BTC heterojunction, boosting catalytic activity beyond conventional cerium-based nanozymes
Tannic acid's proton-coupled electron transfer effect accelerates Ce3+/Ce4+ redox cycling, sustaining dual superoxide dismutase and catalase-like enzyme activity
In vivo testing showed the treatment upregulated tight-junction proteins, repaired the mucosal barrier, and restored gut microbiota balance in a model of inflammatory bowel disease
chevron_right Technical Summary
Scientists built a tiny ultrasound-activated particle that mimics natural antioxidant enzymes to mop up cell-damaging molecules in the gut, showing promise as a treatment for inflammatory bowel disease in animal tests.
Abstract Preview
Original paper
Ultrasound-Activated Janus Heterojunction-Mediated Enhanced Cascade Nanozyme for Inflammatory Bowel Disease Therapy.
Inflammatory bowel disease (IBD) is exacerbated by the excessive accumulation of reactive oxygen species (ROS). To overcome the insufficient catalytic activity of conventional cerium-based nanozyme...
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