How does gut bacteria maintain its stability during inflammation?


Pic:Bacteroides thetaiotaomicron gut bacteria. Source: Pic: Bacteroides thetaiotaomicron gut bacteria. Source:

The human gut (intestine) has a dynamic ecosystem consisting of bacteria which can be either beneficial or harmful to the body. These microbial colonies are key to proper digestive functioning and it is noteworthy to understand how they have evolved to withstand bodily disruptions such as dietary changes, pathogens and toxin exposure.

The body responds to infection by activating its inflammatory mechanisms and by secreting molecules like antimicrobial peptides (AMPs) which kill harmful bacteria. In spite of that, healthy gut microbial communities can resist AMPs and can remain stable for years in the gut.

The mechanism by which, these gut micro-organisms or microbiota can withstand high levels of inflammation-associated anti-microbial peptides (AMPs), was studied in a paper published in the journal ‘Science’. They studied a prominent gut commensal (a harmless co-existing bacteria), Bacteroides thetaiotaomicron which underwent a liposaccharide modification on its surface, allowing…

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