Metformin exposure altered intestinal microbiota composition and metabolites in amphibian larvae.
Ecotoxicol Environ Saf
; 267: 115617, 2023 Nov 15.
Article
in En
| MEDLINE
| ID: mdl-37866109
ABSTRACT
The antidiabetic pharmaceutical metformin (MET) is largely unmetabolized by the human body. Its residues are readily detectable in various aquatic environments and may have adverse impacts on the growth and survival of aquatic species. To date, its toxicological effects have scarcely been explored in non-fish species. Here, we exposed the tadpoles of black-spotted pond frog (Pelophylax nigromaculatus) to different concentrations (0, 1, 10 and 100 µg/L) of MET for 30 days and measured the body size, intestinal microbiota and metabolites to evaluate potential effects of MET exposure in amphibian larvae. MET exposure did not affect the growth and intestinal microbial diversity of tadpoles. However, intestinal microbial composition changed significantly, with some pathogenic bacteria (e.g., bacterial genera Salmonella, Comamonas, Stenotrophomonas, Trichococcus) increasing and some beneficial bacteria (e.g., Blautia, Prevotella) decreasing in MET-exposed tadpoles. The levels of some intestinal metabolites associated with growth and immune performance also changed significantly following MET exposure. Overall, our results indicated that exposure to MET, even at environmentally relevant concentrations, would cause intestinal microbiota dysbiosis and metabolite alteration, thereby influencing the health status of non-target aquatic organisms, such as amphibians.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Gastrointestinal Microbiome
/
Metformin
Limits:
Animals
/
Humans
Language:
En
Journal:
Ecotoxicol Environ Saf
Year:
2023
Document type:
Article
Affiliation country:
China