Neurotransmitters Produced By Gut Bacteria Influence The Development Of The Newborn Immune System: Study
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The preclinical study, published in Science Immunology on March 15, showed that bacteria abundant in the guts of newborns produce serotonin, which promotes the development of immune cells called T-regulatory cells or Tregs. These cells suppress inappropriate immune responses to help prevent autoimmune diseases and dangerous allergic reactions to harmless food items or beneficial gut microbes.
"The gut is now known as the second human brain as it makes over 90 percent of the neurotransmitters in the human body. While neurotransmitters such as serotonin are best known for their roles in brain health, receptors for neurotransmitters are located throughout the human body," explained the study's senior author, Dr. Melody Zeng, an assistant professor of immunology in the Gale and Ira Drukier Institute for Children's Research and the Department of Pediatrics at Weill Cornell Medicine. Gut Bacteria in Babies Provide a Helping Hand The researchers observed t