Early protein restriction increases intra-islet GLP-1 production and pancreatic ß-cell proliferation mediated by the ß-catenin pathway.
Eur J Nutr
; 59(8): 3565-3579, 2020 Dec.
Article
en En
| MEDLINE
| ID: mdl-32076803
PURPOSE: In the present study, we investigated whether intra-islet GLP-1 production and its modulation have a role in apoptosis, proliferation or neogenesis that is compromised by protein restriction during the foetal and suckling periods. METHODS: Exendin-4, a GLP-1 receptor agonist (treated groups), or saline (non-treated groups) was intraperitoneally administered for 15 days from 75 to 90 days of age in female adult rats consisting of offspring born to and suckled by mothers fed a control diet (control groups) and who had the same diet until 90 days of age or offspring born to and suckled by mothers fed a low-protein diet and who were fed the control diet after weaning until 90 days of age (protein-restricted group). RESULTS: The ß-cell mass was lower in the protein-restricted groups than in the control groups. Exendin-4 increased ß-cell mass, regardless of the mother's protein intake. The colocalization of GLP-1/glucagon was higher in the protein-restricted rats than in control rats in both the exendin-4-treated and non-treated groups. The frequency of cleaved caspase-3-labelled cells was higher in the non-treated protein-restricted group than in the non-treated control group and was similar in the treated protein-restricted and treated control groups. Regardless of treatment with exendin-4, Ki67-labelled cell frequency and ß-catenin/DAPI colocalization were elevated in the protein-restricted groups. Exendin-4 increased the area of endocrine cell clusters and ß-catenin/DAPI and FoxO1/DAPI colocalization regardless of the mother's protein intake. CONCLUSIONS: Protein restriction in early life increased intra-islet GLP-1 production and ß-cell proliferation, possibly mediated by the ß-catenin pathway.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Islotes Pancreáticos
/
Péptido 1 Similar al Glucagón
Límite:
Animals
Idioma:
En
Revista:
Eur J Nutr
Asunto de la revista:
CIENCIAS DA NUTRICAO
Año:
2020
Tipo del documento:
Article
País de afiliación:
Brasil
Pais de publicación:
Alemania