Gut Phages Use Modular Proteins to Enter Human Cells, Persisting Longer in Mice
Updated
Updated · BIOENGINEER.ORG · Jun 12
Gut Phages Use Modular Proteins to Enter Human Cells, Persisting Longer in Mice
3 articles · Updated · BIOENGINEER.ORG · Jun 12
Summary
Researchers at HUN-REN’s Szeged center found prevalent gut bacteriophages carry modular adhesion proteins that let them bind to and enter human epithelial cells, challenging the view that phages interact only with bacteria.
Genetic engineering showed those proteins drive the effect: when transferred onto phages that normally lack them, the engineered viruses bound cells more strongly, entered them more often and persisted longer in the murine gut.
Microscopy traced internalized phages mainly to the Golgi apparatus and endoplasmic reticulum rather than degradative lysosomal pathways, suggesting some may remain structurally intact inside cells.
The team said the adhesins appear common in dominant gut virome members, implying epithelial attachment is an evolved survival strategy in the mucus-rich intestine rather than an incidental event.
The finding could reshape phage therapy by helping engineers design phages that localize better to tissues and remain active longer against antibiotic-resistant infections.
Gut viruses can enter our cells. Is this the key to defeating superbugs, or a hidden danger we've just uncovered?
How will engineering viruses to stick to human tissues revolutionize the fight against untreatable infections?
If phages directly interact with our cells, what does this mean for our immune system and long-term health?
Gut Phages Enter Human Cells: New Mechanisms, Health Implications, and Therapeutic Frontiers (2023–2026 Breakthroughs)
Overview
A recent study published in 2026 revealed that common gut bacteriophages use specialized proteins called modular adhesins to enter human epithelial cells. These adhesins, which have immunoglobulin-like domains, act as molecular keys that allow phages to attach to and then move inside human cells, reaching the endoplasmic reticulum. This discovery challenges the old belief that phages only interact with bacteria and shows a direct, active connection between gut phages and human cells. The findings open new possibilities for understanding gut health and developing targeted therapies using phages.