Oleic Acid Protects Against Insulin Resistance by Regulating the Genes Related to the PI3K Signaling Pathway.
J Clin Med
; 9(8)2020 Aug 12.
Article
en En
| MEDLINE
| ID: mdl-32806641
ABSTRACT
BACKGROUND:
The effects of different types of fatty acids on the gene expression of key players in the IRS1/PI3K signaling pathway have been poorly studied. MATERIAL ANDMETHODS:
We analyzed IRS1, p85α, and p110ß mRNA expression and the fatty acid composition of phospholipids in visceral adipose tissue from patients with morbid obesity and from non-obese patients. Moreover, we analyzed the expression of those genes in visceral adipocytes incubated with oleic, linoleic, palmitic and dosahexaenoic acids.RESULTS:
We found a reduced IRS1 expression in patients with morbid obesity, independent of insulin resistance, and a reduced p110ß expression in those with lower insulin resistance. A positive correlation was found between p85α and stearic acid, and between IRS1 and p110ß with palmitic and dosahexaenoic acid. In contrast, a negative correlation was found between p85α and oleic acid, and between IRS1 and p110ß with linoleic, arachidonic and adrenic acid. Incubation with palmitic acid decreased IRS1 expression. p85α was down-regulated after incubation with oleic and dosahexaenoic acid and up-regulated with palmitic acid. p110ß expression was increased and decreased after incubation with oleic and palmitic acid, respectively. The ratio p85α/p110ß was decreased by oleic and dosahexaenoic acid and increased by palmitic acid.CONCLUSIONS:
Our in vitro results suggest a detrimental role of palmitic acid on the expression of gene related to insulin signaling pathway, with oleic acid being the one with the higher and more beneficial effects. DHA had a slight beneficial effect. Fatty acid-induced regulation of genes related to the IRS1/PI3K pathway may be a novel mechanism by which fatty acids regulate insulin sensitivity in visceral adipocytes.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Idioma:
En
Revista:
J Clin Med
Año:
2020
Tipo del documento:
Article
País de afiliación:
España