Abstract | OBJECTIVE: METHODS: The cell-surface GLUT4myc levels were determined by an antibody-coupled colorimetric assay. The phosphorylation levels of Akt, PI3K(p85α), AS160, IRS1, IKK, and JNK were determined by western blotting. The quantifications of mRNA levels of TNFα, IL-1β, and IL-6 were determined by real-time PCR. Analysis of variance was used for data analysis. RESULTS: PA elevated not only phosphorylation of JNK, IRS1 serines, and IKKα/β, but also the expression of IL-6, TNFα and IL-1β in C2C12-GLUT4myc cells. PA can reduce phosphorylation of IRS1 tyrosine. These effects of PA were reversed by liraglutide. In addition, liraglutide can reverse PA-decreased insulin-stimulated cell-surface GLUT4 levels, Akt, PI3K(p85α), and AS160 phosphorylation. CONCLUSIONS:
Liraglutide can enhance insulin-induced GLUT4 translocation by inhibiting IRS1 serine phosphorylation in PA-treated muscle cells.
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Authors | Z Li, Y Zhu, C Li, Y Tang, Z Jiang, M Yang, C-L Ni, D Li, L Chen, W Niu |
Journal | Journal of endocrinological investigation
(J Endocrinol Invest)
Vol. 41
Issue 9
Pg. 1097-1102
(Sep 2018)
ISSN: 1720-8386 [Electronic] Italy |
PMID | 29374854
(Publication Type: Journal Article)
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Chemical References |
- Glucose Transporter Type 4
- Hypoglycemic Agents
- Insulin Receptor Substrate Proteins
- Irs1 protein, mouse
- Palmitates
- Slc2a4 protein, mouse
- Liraglutide
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Topics |
- Animals
- Cell Line
- Glucose Transporter Type 4
(metabolism)
- Humans
- Hypoglycemic Agents
(pharmacology)
- Insulin Receptor Substrate Proteins
(antagonists & inhibitors, metabolism)
- Insulin Resistance
(physiology)
- Liraglutide
(pharmacology)
- Mice
- Muscle Fibers, Skeletal
(drug effects, metabolism)
- Palmitates
(toxicity)
- Phosphorylation
(drug effects, physiology)
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