“New research by investigators at Brigham and Women’s Hospital (BWH) suggests that bacteria living in the gut may remotely influence the activity of cells in the brain that are involved in controlling inflammation and neurodegeneration.”
Veit Rothhammer et al, Type I interferons and microbial metabolites of tryptophan modulate astrocyte activity and central nervous system inflammation via the aryl hydrocarbon receptor, Nature Medicine(2016). DOI: 10.1038/nm.4106