Transferring the blues: Depression-associated gut microbiota induces neurobehavioural changes in the rat.

By J. R. Kelly, Y. Borre, Ciaran O' Brien, E. Patterson, Sahar El Aidy, J. Deane, P. Kennedy, S. Beers, K. Scott, G. Moloney and 8 more. Journal of Psychiatric Research, 2016

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Tryptophan Metabolism: A Link Between the Gut Microbiota and Brain. (2019, background): “These alterations in the tryptophan metabolism may be driven by the gut microbiota, as evidenced by a previous study revealing that the colonization of GF rats with gut microbiota from depressive patients also induces neurobehavioral changes, with an increased kynurenine to tryptophan ratio in blood”
Targeting the Microbiota-Gut-Brain Axis: Prebiotics Have Anxiolytic and Antidepressant-like Effects and Reverse the Impact of Chronic Stress in Mice. (2017, neutral): “The microbiota of mice after chronic social stress was similar to that observed in a previous study in rats that received fecal microbiota transplantation from patients with depression (58); the relative abundance of Actinobacteria was decreased at the phylum level, the relative abundance(s) of Bifi”
Short‐chain fatty acids: microbial metabolites that alleviate stress‐induced brain–gut axis alterations (2018, methodology): “Mice were assessed for hedonic-like behaviour using the sucrose preference test, which was conducted as previously described (Kelly et al. 2016).”
Stress & the gut-brain axis: Regulation by the microbiome (2017, neutral): “A link between disease-related microbiota and behaviour was also recently demonstrated, where fecal microbiota transplantation from depressed patients to microbiota-depleted rats increased anhedonia and anxiety-like behaviours (Kelly et al., 2016).”