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Yoon-Jung Choi  (Choi YJ) 1 Article
Hexane Extract of Orthosiphon stamineus Induces Insulin Expression and Prevents Glucotoxicity in INS-1 Cells
Hae-Jung Lee, Yoon-Jung Choi, So-Young Park, Jong-Yeon Kim, Kyu-Chang Won, Jong-Keun Son, Yong-Woon Kim
Diabetes Metab J. 2015;39(1):51-58.   Published online February 16, 2015
DOI: https://doi.org/10.4093/dmj.2015.39.1.51
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  • 10 Web of Science
  • 8 Crossref
AbstractAbstract PDFPubReader   
Background

Hyperglycemia, a characteristic feature of diabetes, induces glucotoxicity in pancreatic β-cells, resulting in further impairment of insulin secretion and worsening glycemic control. Thus, preservation of insulin secretory capacity is essential for the management of type 2 diabetes. In this study, we evaluated the ability of an Orthosiphon stamineus (OS) extract to prevent glucotoxicity in insulin-producing cells.

Methods

We measured insulin mRNA expression and glucose-stimulated insulin secretion (GSIS) in OS-treated INS-1 cells after exposure to a high glucose (HG; 30 mM) concentration.

Results

The hexane extract of OS elevated mRNA expression of insulin as well as pancreatic and duodenal homeobox-1 of INS-1 cells in a dose-dependent manner. The hexane OS extract also increased the levels of phosphorylated phosphatidylinositol 3-kinase (PI3K) in a concentration-dependent manner. Additionally, Akt phosphorylation was elevated by treatment with 100 and 200 µmol of the hexane OS extract. Three days of HG exposure suppressed insulin mRNA expression and GSIS; these expressions were restored by treatment with the hexane OS extract. HG elevated peroxide levels in the INS-1 cells. These levels were unaffected by OS treatment under both normal and hyperglycemic conditions.

Conclusion

Our results suggested that the hexane extract of OS elevates insulin mRNA expression and prevents glucotoxicity induced by a 3-day treatment with HG. This was associated with the activation of PI-3K and Akt.

Citations

Citations to this article as recorded by  
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    Malaysian Applied Biology.2024; 53(1): 1.     CrossRef
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    International Journal of Molecular Sciences.2019; 20(10): 2458.     CrossRef
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  • 50% Ethanol extract of Orthosiphon stamineus modulates genotoxicity and clastogenicity induced by mitomycin C
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  • Can Tea Extracts Exert a Protective Effect Against Diabetes by Reducing Oxidative Stress and Decreasing Glucotoxicity in Pancreatic β-Cells?
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