Inhibition of GIP signaling extends lifespan without caloric restriction.
Biochem Biophys Res Commun
; 513(4): 974-982, 2019 06 11.
Article
em En
| MEDLINE
| ID: mdl-31003779
ABSTRACT
AIMS/INTRODUCTION:
Caloric restriction (CR) promotes longevity and exerts anti-aging effects by increasing Sirtuin production and activation. Gastric inhibitory polypeptide (GIP), a gastrointestinal peptide hormone, exerts various effects on pancreatic ß-cells and extra-pancreatic tissues. GIP promotes glucose-dependent augmentation of insulin secretion and uptake of nutrients into the adipose tissue. MATERIALS ANDMETHODS:
Gipr-/- and Gipr+/+ mice were used for lifespan analysis, behavior experiments and gene expression of adipose tissue and muscles. 3T3-L1 differentiated adipocytes were used for Sirt1 and Nampt expression followed by treatment with GIP and α-lipoic acid.RESULTS:
We observed that GIP receptor-knockout (Gipr-/-) mice fed normal diet showed an extended lifespan, increased exploratory and decreased anxiety-based behaviors, which are characteristic behavioral changes under CR. Moreover, Gipr-/- mice showed increased Sirt1 and Nampt expression in the adipose tissue. GIP suppressed α-lipoic acid-induced Sirt1 expression and activity in differentiated adipocytes.CONCLUSIONS:
Although maintenance of CR is difficult, food intake and muscle endurance of Gipr-/- mice were similar to those of wild-type mice. Inhibition of GIP signaling may be a novel strategy to extend the lifespan of diabetic patients.Palavras-chave
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Polipeptídeo Inibidor Gástrico
/
Transdução de Sinais
/
Restrição Calórica
/
Longevidade
Limite:
Animals
Idioma:
En
Revista:
Biochem Biophys Res Commun
Ano de publicação:
2019
Tipo de documento:
Article
País de afiliação:
Japão