Translocation of gut commensal bacteria to the brain.

Autor:	Thapa M; Emory Vaccine Center, Division of Microbiology and Immunology, Emory National Primate Research Center, Emory University, Atlanta, Georgia., Kumari A; Emory Vaccine Center, Division of Microbiology and Immunology, Emory National Primate Research Center, Emory University, Atlanta, Georgia., Chin CY; Emory Vaccine Center, Division of Microbiology and Immunology, Emory National Primate Research Center, Emory University, Atlanta, Georgia., Choby JE; Emory Vaccine Center, Division of Microbiology and Immunology, Emory National Primate Research Center, Emory University, Atlanta, Georgia., Jin F; Emory Vaccine Center, Division of Microbiology and Immunology, Emory National Primate Research Center, Emory University, Atlanta, Georgia., Bogati B; Emory Vaccine Center, Division of Microbiology and Immunology, Emory National Primate Research Center, Emory University, Atlanta, Georgia., Chopyk DM; Emory Vaccine Center, Division of Microbiology and Immunology, Emory National Primate Research Center, Emory University, Atlanta, Georgia., Koduri N; Emory Vaccine Center, Division of Microbiology and Immunology, Emory National Primate Research Center, Emory University, Atlanta, Georgia., Pahnke A; Emory Vaccine Center, Division of Microbiology and Immunology, Emory National Primate Research Center, Emory University, Atlanta, Georgia., Elrod EJ; Emory Vaccine Center, Division of Microbiology and Immunology, Emory National Primate Research Center, Emory University, Atlanta, Georgia., Burd EM; Division of Infectious Diseases, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia.; Emory Antibiotic Resistance Center, Emory University School of Medicine, Atlanta, Georgia.; Department of Pathology and Laboratory Medicine, Emory University, Atlanta, Georgia., Weiss DS; Emory Vaccine Center, Division of Microbiology and Immunology, Emory National Primate Research Center, Emory University, Atlanta, Georgia.; Division of Infectious Diseases, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia.; Emory Antibiotic Resistance Center, Emory University School of Medicine, Atlanta, Georgia., Grakoui A; Emory Vaccine Center, Division of Microbiology and Immunology, Emory National Primate Research Center, Emory University, Atlanta, Georgia.; Division of Infectious Diseases, Department of Medicine, Emory University School of Medicine, Atlanta, Georgia.
Jazyk:	angličtina
Zdroj:	BioRxiv : the preprint server for biology [bioRxiv] 2023 Sep 01. Date of Electronic Publication: 2023 Sep 01.
DOI:	10.1101/2023.08.30.555630
Abstrakt:	The gut-brain axis, a bidirectional signaling network between the intestine and the central nervous system, is crucial to the regulation of host physiology and inflammation. Recent advances suggest a strong correlation between gut dysbiosis and neurological diseases, however, relatively little is known about how gut bacteria impact the brain. Here, we reveal that gut commensal bacteria can translocate directly to the brain when mice are fed an altered diet that causes dysbiosis and intestinal permeability, and that this also occurs without diet alteration in distinct murine models of neurological disease. The bacteria were not found in other systemic sites or the blood, but were detected in the vagus nerve. Unilateral cervical vagotomy significantly reduced the number of bacteria in the brain, implicating the vagus nerve as a conduit for translocation. The presence of bacteria in the brain correlated with microglial activation, a marker of neuroinflammation, and with neural protein aggregation, a hallmark of several neurodegenerative diseases. In at least one model, the presence of bacteria in the brain was reversible as a switch from high-fat to standard diet resulted in amelioration of intestinal permeability, led to a gradual loss of detectable bacteria in the brain, and reduced the number of neural protein aggregates. Further, in murine models of Alzheimer's disease, Parkinson's disease, and autism spectrum disorder, we observed gut dysbiosis, gut leakiness, bacterial translocation to the brain, and microglial activation. These data reveal a commensal bacterial translocation axis to the brain in models of diverse neurological diseases. Competing Interests: The authors have no conflicts of interest to disclose.
Databáze:	MEDLINE
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