Antibiotics and the Gut Microbiome

Antibiotics given to infant mice may have long-term effects on the animals’ metabolism and gut microbiota.

Written byAnna Azvolinsky
| 3 min read

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WIKIMEDIA, SAGE ROSSEven short pulses of widely used antibiotics can lead to long-term development changes in mouse pups, including increased body mass and bone growth and changes to the gut microbiota, according to a study published today (June 30) in Nature Communications.

“While this is a correlative study, [the researchers] present a plausible case that antibiotics, by changing the gut microbiota, may affect host function,” said Lee Kaplan, a gastroenterologist and molecular biologist at the Massachusetts General Hospital in Boston who was not involved in the work. “This suggests there may be correlates between the microbiota and changes in the host that can be identified in future experiments and exploited for therapeutic benefit.”

In prior studies, microbiologist Martin Blaser of the New York University Langone Medical Center and his colleagues showed that mice given low-doses of penicillin shortly after birth became overweight in adulthood if fed a high-fat diet, and that this effect was due to changes in the gut microbiota and metabolism. Seeing profound changes with ...

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    Anna Azvolinsky received a PhD in molecular biology in November 2008 from Princeton University. Her graduate research focused on a genome-wide analyses of genomic integrity and DNA replication. She did a one-year post-doctoral fellowship at Memorial Sloan Kettering Cancer Center in New York City and then left academia to pursue science writing. She has been a freelance science writer since 2012, based in New York City.

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