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Do we control our gut biome? Maybe

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File:A small cup of coffee.JPG Scientific American asks:

Does our Microbiome Control Us or Do We Control It?

What the article tells us is not the conventional “they utterly control us” that probably caused you to skip it before:

We may be able to keep our gut in check after all. That’s the tantalizing finding from a new study published today that reveals a way that mice—and potentially humans—can control the makeup and behavior of their gut microbiome. Such a prospect upends the popular notion that the complex ecosystem of germs residing in our guts essentially acts as our puppet master, altering brain biochemistry even as it tends to our immune system, wards off infection and helps us break down our supersized burger and fries.

In a series of elaborate experiments researchers from Harvard Medical School and Brigham and Women’s Hospital discovered that mouse poop is chock full of tiny, noncoding RNAs called microRNAs from their gastrointestinal (GI) tracts and that these biomolecules appear to shape and regulate the microbiome. “We’ve known about how microbes can influence your health for a few years now and in a way we’ve always suspected it’s a two-way process, but never really pinned it down that well,” says Tim Spector, a professor of genetic epidemiology at King’s College London, not involved with the new study. More.

Humans share 17 of these microRNAs with mice.

So our gut biomes are not necessarily telling our brains to eat junk food?

See also: Scientists urge focus on microbiome

The ocean’s microbiome resembles the human gut’s microbia

and

Harvard epidemiologist William P. Hanage offers five skeptical questions about the microbiome

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