Authors: F.Guida, F.Turco, M.Iannotta, D.De Gregorio, I.Palumbo, G.Sarnelli, A.Furiano, F.Napolitano, S.Boccella, L.Luongo, M.Mazzitelli, A.Usiello, F.De Filippis, F.A.Iannotti, F.Piscitelli, D.Ercolini, V.de Novellis, V.Di Marzo, R.Cuomo, S.Maione
- Department of Experimental Medicine, Section of Pharmacology L. Donatelli, Universit? degli Studi della Campania ?Luigi Vanvitelli?, Naples, Italy
- Department of Clinical Medicine and Surgery, Federico II University of Naples, Naples, Italy
- Ceinge Biotecnologie Avanzate, Naples, Italy
- Department of Molecular Medicine and Medical Biotechnology, University of Naples ?Federico II?, Naples, Italy
- Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, Universit? degli Studi della Campania ?Luigi Vanvitelli?, Caserta, Italy
Publication:?Brain, Behavior and Immunity
The microbiota-gut-brain axis (MGBA) regulates the reciprocal interaction between chronic inflammatory bowel and psychiatric disorders. This interaction involves multiple pathways that are highly debated. We examined the behavioural, biochemical and electrophysiological alterations, as well as gut microbiota composition in a model of antibiotic-induced experimental dysbiosis. Inflammation of the small intestine was also assessed. Mice were exposed to a mixture of antimicrobials for 2weeks. Afterwards, they received Lactobacillus casei DG (LCDG) or a vehicle for up to 7days via oral gavage. Perturbation of microbiota was accompanied by a general inflammatory state and alteration of some endocannabinoidome members in the gut. Behavioural changes, including increased immobility in the tail suspension test and reduced social recognition were observed, and were associated with altered BDNF/TrkB signalling, TRPV1 phosphorylation and neuronal firing in the hippocampus. Moreover, morphological rearrangements of non-neuronal cells in brain areas controlling emotional behaviour were detected. Subsequent probiotic administration, compared with vehicle, counteracted most of these gut inflammatory, behavioural, biochemical and functional alterations. Interestingly, levels of Lachnospiraceae were found to significantly correlate with the behavioural changes observed in dysbiotic mice. Our findings clarify some of the biomolecular and functional modifications leading to the development of affective disorders associated with gut microbiota alterations.