How our gut bacteria may have influenced evolution

body dna

[Editor’s note: Susan Erdman is a research scientist and assistant director of MIT’s Division of Comparative Medicine.]

Lately I’ve been wondering if microbes helped drive the bus…I’ve been studying the microbiome for more than 20 years…Several findings from our work make me think that microbes helping steer the evolution of humans isn’t such a far-fetched idea.

For starters, in our “glow of health” study, we fed to mice bacteria extracted from human breast milk. This dietary addition gave them thicker skin, more lustrous fur, and, in females, more acidic vaginal mucus. That change in mucus is correlated with increased fertility in mice — and in humans.

[Similarly], testosterone levels in mice soar after eating these bacteria. Such microbe-treated mice display larger testicles with higher sperm counts and also build extra muscle. The resulting “mouse swagger” would give these mice a competitive edge in combat and romance, letting them spread their genes and microbes more widely and for a longer time.

Interestingly, mouse moms consuming probiotic bacteria from human breast milk actually take better care of their infants — and are less likely to eat them — compared with untreated mice or those eating other types of diets. Following this line of reasoning, the bacteria help make more mice and thus more future microbe hosts.

The GLP aggregated and excerpted this blog/article to reflect the diversity of news, opinion, and analysis. Read full, original post: Did the microbiome help drive human evolution?

Outbreak
Outbreak Daily Digest
Biotech Facts & Fallacies
Genetics Unzipped
Infographic: How dangerous COVID mutant strains develop

Infographic: How dangerous COVID mutant strains develop

Sometime in 2019, probably in China, SARS CoV-2 figured out a way to interact with a specific "spike" on the ...
Untitled

Philip Njemanze: Leading African anti-GMO activist claims Gates Foundation destroying Nigeria

Nigerian anti-GMO activist, physician, and inventor pushes anti-gay and anti-GMO ...

Most Popular

News on human & agricultural genetics and biotechnology delivered to your inbox.
glp menu logo outlined

Newsletter Subscription

Optional. Mail on special occasions.
Send this to a friend