Spatially resolved lipidomics shows conditional transfer of lipids produced by Bacteroides thetaiotaomicron into the mouse gut.
Cell Host Microbe
; 32(6): 1025-1036.e5, 2024 Jun 12.
Article
en En
| MEDLINE
| ID: mdl-38795710
ABSTRACT
The extent to which bacterial lipids produced by the gut microbiota penetrate host tissues is unclear. Here, we combined mass spectrometry approaches to identify lipids produced by the human gut symbiont Bacteroides thetaiotaomicron (B. theta) and spatially track these bacterial lipids in the mouse colon. We characterize 130 B. theta lipids by liquid chromatography-tandem mass spectrometry (LC-MS/MS), using wild-type and mutant B. theta strains to confidently identify lipid structures and their interconnected pathways in vitro. Of these, 103 B. theta lipids can be detected and spatially mapped in a single MALDI mass spectrometry imaging run. We map unlabeled bacterial lipids across colon sections of germ-free and specific-pathogen-free (SPF) mice and mice mono-colonized with wild-type or sphingolipid-deficient (BTMUT) B. theta. We observe co-localization of bacterially derived phosphatidic acid with host tissues in BTMUT mice, consistent with lipid penetration into host tissues. These results indicate limited and selective transfer of bacterial lipids to the host.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Colon
/
Microbioma Gastrointestinal
/
Bacteroides thetaiotaomicron
/
Lipidómica
Límite:
Animals
/
Female
/
Humans
Idioma:
En
Revista:
Cell Host Microbe
Asunto de la revista:
MICROBIOLOGIA
Año:
2024
Tipo del documento:
Article
País de afiliación:
Alemania