Environmental Influence on Bacterial Lipid Composition:\nInsights from Pathogenic and Probiotic Strains

The lipid composition\nof bacterial membranes is pivotal in regulating\nbacterial physiology, pathogenicity, and interactions with hosts.\nThis study presents a comprehensive analysis of bacterial membrane\nlipid profiles across diverse Gram-positive and Gram-negative species.\nUtilizing matrix-assisted laser desorption/ionization (MALDI) in conjunction\nwith advanced chemometric tools, we investigate the influence of environmental\nfactors, isolation sources, and host metabolism on bacterial lipid\nprofiles. Our findings unveil significant variations in lipid composition\nattributed to factors such as carbon/energy availability and exposure\nto chemicals, including antibiotics. Moreover, we identify distinct\nlipidomic signatures associated with pathogenic and probiotic bacterial\nstrains, shedding light on their functional properties and metabolic\npathways. Notably, bacterial strains isolated from clinical samples\nexhibit unique lipid profiles influenced by host metabolic dysregulation,\nparticularly evident in conditions such as diabetic foot infections.\nThese results deepen our understanding of the intricate mechanisms\ngoverning bacterial membrane lipid biology and hold promise for informing\nthe development of innovative therapeutic and biotechnological strategies.