Multi-Omics Unveils Strain-Specific Neuroactive Metabolite Production Linked to Inflammation Modulation by Bacteroides and Their Vesicles

18 Bacteroidetes isoaltes were analyzed for their neuroactive potentail using un-targeted and targeted metabolomics. The bacteria were grown to stationary phase, the supernatant was separated and purified using 0.22 um filter. The metabolome from the supernatant was extracted using standard Methanol extraction. The reconstituted supernatant samples were transferred into LC vials and loaded onto a sample tray in the nanoLC coupled to the Q-Exactive Plus mass spectrometer (Thermo Fisher Scientific). Chromatographic separation of metabolites was performed on a Proxeon EASY nLC II System (Thermo Fisher Scientific) equipped with a Thermo Scientific Acclaim PepMap RSLC C18 column (P/N ES800A). The Xbridge BEH Amide (2.5 μm, 2.1 x 150 mm, Waters, Milford, MA, USA) column was used for metabolite separation.