Phylogenetic barriers to horizontal transfer of antimicrobial peptide resistance genes in the human gut microbiota.
Nat Microbiol
; 4(3): 447-458, 2019 03.
Article
en En
| MEDLINE
| ID: mdl-30559406
The human gut microbiota has adapted to the presence of antimicrobial peptides (AMPs), which are ancient components of immune defence. Despite its medical importance, it has remained unclear whether AMP resistance genes in the gut microbiome are available for genetic exchange between bacterial species. Here, we show that AMP resistance and antibiotic resistance genes differ in their mobilization patterns and functional compatibilities with new bacterial hosts. First, whereas AMP resistance genes are widespread in the gut microbiome, their rate of horizontal transfer is lower than that of antibiotic resistance genes. Second, gut microbiota culturing and functional metagenomics have revealed that AMP resistance genes originating from phylogenetically distant bacteria have only a limited potential to confer resistance in Escherichia coli, an intrinsically susceptible species. Taken together, functional compatibility with the new bacterial host emerges as a key factor limiting the genetic exchange of AMP resistance genes. Finally, our results suggest that AMPs induce highly specific changes in the composition of the human microbiota, with implications for disease risks.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Filogenia
/
Bacterias
/
Péptidos Catiónicos Antimicrobianos
/
Transferencia de Gen Horizontal
/
Microbioma Gastrointestinal
/
Genes Bacterianos
Límite:
Humans
Idioma:
En
Revista:
Nat Microbiol
Año:
2019
Tipo del documento:
Article
País de afiliación:
Hungria
Pais de publicación:
Reino Unido