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Liraglutide Exerts Potential Anti-inflammatory Effect in Type 1 Diabetes by Inhibiting IFN-γ Production via Suppressing JAK-STAT Pathway

[ Vol. 19 , Issue. 5 ]

Author(s):

Yunjuan Zhao, Yunliang Xie and Wangen Li*   Pages 656 - 664 ( 9 )

Abstract:


Background: Type 1 diabetes is a T cell-mediated autoimmune disease. Interferon γ plays a critical role in the pathogenesis of type 1 diabetes. Signal transducer and activator of transcription transduces type I interferon cytokines in T cells, leading to Th1 cell differentiation and production of interferon γ. Recent studies suggest that liraglutide reduces the plasma concentration of C-reative protein in patients with type 1 diabetes and protects β cell function in the non-obese diabetic mouse.

Objective: The study aimed to explore the effect of glucagon-like peptide-1 analogue on interferon γ production and the underlying signaling pathway in vitro.

Methods: Jurkat E6-1 cells were intervened with different concentrations of glucose and liraglutide during different time periods. Protein was extracted from Jurkat E6-1 cells. The target proteins (total and activated Janus kinase 2, signal transducers and activators of transcription 4 and interferon γ) were detected by Western blot.

Results: Glucose stimulates interferon γ expression and activates Janus kinase 2/signal transducers and activators of transcription 4 signaling pathway in Jurkat E6-1 cells in a concentration and timedependent manner. Under high glucose condition, liraglutide inhibits interferon γ expression and Janus kinase 2/signal transducers and activators of transcription 4 signaling pathway in Jurkat E6-1 cells in a concentration and time-dependent manner. The Janus kinase responsible for liraglutide-inhibited signal transducers and activators of transcription 4 phosphorylation is Janus kinase 2, which is also required for the interferon γ induction. Finally, we demonstrated that under high glucose condition, liraglutide inhibits interferon γ expression via Janus kinase 2/signal transducers and activators of transcription 4 signaling pathway in Jurkat E6-1 cells.

Conclusion: Liraglutide inhibits Jurkat E6-1 cells to produce interferon γ via the Janus kinase/signal transducers and activators of transcription signaling pathway under high glucose condition, which implies its potential in the immunoregulatory effect of type 1 diabetes.

Keywords:

Liraglutide, IFN-γ, type 1 diabetes, T cell, JAK-STAT pathway, GLP-1.

Affiliation:

Department of Endocrinology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, The East Chang-Gang Road, Guangzhou, Department of Endocrinology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, The East Chang-Gang Road, Guangzhou, Department of Endocrinology, The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou, The East Chang-Gang Road, Guangzhou

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