Australian Scientists Discover Hundreds of New Gut Viruses
hundreds of unknown Viruses Discovered in the human Gut
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– Researchers at Monash University in Australia have identified hundreds of previously unknown viruses residing within bacteria in the human gut, a discovery with potential implications for gut health and disease treatment. This article was last updated on .
The Discovery of Gut Bacteriophages
The viruses, known as bacteriophages, infect and replicate within bacteria. The research, published in Nature on February 8, 2024, marks the first large-scale, culture-based study of temperate bacteriophages in the human gut. Temperate bacteriophages don’t instantly kill their host bacteria, instead integrating their genetic material and possibly influencing bacterial behavior.
The research team analyzed 252 bacterial isolates from the human microbiome, cultivated in specialized anaerobic chambers lacking oxygen.Thes isolates were then exposed to ten different compounds, foods, and conditions to observe viral activity.
Stevia and Gut Cell Compounds Activate Dormant Viruses
the study revealed that Stevia, a widely used plant-based sugar substitute, and compounds released by human gut cells are potent activators of these gut phages. these activators can “awaken” dormant viruses within gut bacteria, potentially impacting conditions like inflammatory bowel disease (IBD).This suggests a direct link between dietary factors and viral activity within the gut.
“This is a foundational study that changes how we think about and study the viruses within the human gut,” stated Professor Jeremy Barr of Monash University’s School of Biological Sciences, the study’s senior author. The research indicates that the human body actively influences the viral landscape of the gut, rather than simply providing a passive environment.
“Our findings suggest that the human host isn’t just a passive environment, it’s actively influencing viral behavior,” explained Sofia Dahlman, the study’s first author and a researcher at Monash University.
CRISPR Insights and Future Therapeutic Potential
Using CRISPR-based genetic engineering, researchers identified mutations in viral genes that prevent activation, shedding light on how some gut viruses become permanently dormant. Understanding these mechanisms could inform future therapeutic strategies aimed at manipulating the gut microbiome to improve health.
Professor Barr noted that the study lays the groundwork for applications in synthetic biology, biotechnology, and microbiome therapeutics, representing a significant step towards “decoding the viral dark matter of the human gut.”