This record provides bibliographic details and links to the original research. An editorial study breakdown is not available.
What the researchers found
Chronic social defeat stress reduced Paneth cell alpha-defensin secretion, causing dysbiosis and metabolite changes that were reversed by alpha-defensin administration in mice.
Why it matters
The gut-brain connection in depression is increasingly recognized but poorly understood. This study identifies alpha-defensin as a key link between psychological stress, microbiome disruption, and potentially depression.
The numbers in context
CSDS reduced α-defensin secretion; induced dysbiosis; changed metabolites; all reversed by α-defensin administration; Paneth cells identified as stress-responsive
How the study worked
Mouse depression model (chronic social defeat stress). Measured Paneth cell alpha-defensin secretion. Analyzed intestinal microbiota composition and metabolites. Tested whether exogenous alpha-defensin administration could reverse stress-induced changes.
Who was studied
Mice in chronic social defeat stress model with analysis of Paneth cell defensin secretion, microbiome, and metabolites
What this study cannot tell us
Mouse model of depression, which has limitations in modeling human depression. Only one stress model tested. The specific microbiome and metabolite changes were not detailed in the abstract. Whether similar mechanisms operate in humans is unknown.
Read the original research
Decrease of α-defensin impairs intestinal metabolite homeostasis via dysbiosis in mouse chronic social defeat stress model.
Scientific reports, 11(1), 9915
Citation
Suzuki, Kosuke; Nakamura, Kiminori; Shimizu, Yu; Yokoi, Yuki; Ohira, Shuya; Hagiwara, Mizu; Wang, Yi; Song, Yuchi; Aizawa, Tomoyasu; Ayabe, Tokiyoshi. (2021). Decrease of α-defensin impairs intestinal metabolite homeostasis via dysbiosis in mouse chronic social defeat stress model.. Scientific reports, 11(1), 9915. https://doi.org/10.1038/s41598-021-89308-y