Bacterial hydrogen sulfide drives cryptic redox chemistry in gut microbial communities.
Nat Metab
; 4(10): 1260-1270, 2022 10.
Article
em En
| MEDLINE
| ID: mdl-36266544
ABSTRACT
Microbial biochemistry contributes to a dynamic environment in the gut. Yet, how bacterial metabolites such as hydrogen sulfide (H2S) mechanistically alter the gut chemical landscape is poorly understood. Here we show that microbially generated H2S drives the abiotic reduction of azo (R-N = N-R') xenobiotics, which are commonly found in Western food dyes and drugs. This nonenzymatic reduction of azo compounds is demonstrated in Escherichia coli cultures, in human faecal microbial communities and in vivo in male mice. Changing dietary levels of the H2S xenobiotic redox partner Red 40 transiently decreases mouse faecal sulfide levels, demonstrating that a xenobiotic can attenuate sulfide concentration and alleviate H2S accumulation in vivo. Cryptic H2S redox chemistry thus can modulate sulfur homeostasis, alter the chemical landscape in the gut and contribute to azo food dye and drug metabolism. Interactions between chemicals derived from microbial communities may be a key feature shaping metabolism in the gut.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Microbiota
/
Sulfeto de Hidrogênio
Limite:
Animals
/
Humans
/
Male
Idioma:
En
Revista:
Nat Metab
Ano de publicação:
2022
Tipo de documento:
Article
País de afiliação:
Estados Unidos