Topic: Gastrointestinal Health

A new study published in the journal Cell Reports has shed light on the role of gut bacteria in producing serotonin, a neurotransmitter linked to mood and digestion. Researchers found that two specific bacterial species, Limosilactobacillus mucosae and Ligilactobacillus ruminis, can work together to produce biologically active serotonin.

Bacterial Serotonin Production

When these bacteria were introduced into germ-free mice with low serotonin levels, the researchers observed a significant increase in intestinal serotonin levels. Additionally, the number of nerve cells in the colon increased, and gut motility returned to normal.

"It is incredibly fascinating how the gut bacteria can produce bioactive signaling molecules that affect health," says Fredrik Bäckhed, Professor of molecular medicine at Sahlgrenska Academy at the University of Gothenburg.

Implications for IBS Treatment

The study also found that individuals with Irritable Bowel Syndrome (IBS) had lower levels of L. mucosae in their stool samples compared to healthy individuals. This bacterium contains the enzyme necessary for serotonin production. The researchers suggest that this discovery may lead to new avenues for treating functional gastrointestinal disorders like IBS.

Magnus Simrén, Professor of medical gastroenterology at Sahlgrenska Academy at the University of Gothenburg, notes: "Our results indicate that certain intestinal bacteria can produce bioactive serotonin and thus play an important role in intestinal health and open new avenues for the treatment of functional gastrointestinal disorders such as IBS."