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Dual Beneficial Effects of α-Spinasterol Isolated from Aster pseudoglehnii on Glucose Uptake in Skeletal Muscle Cells and Glucose-Stimulated Insulin Secretion in Pancreatic β-Cells
| Content Provider | MDPI |
|---|---|
| Author | Lee, Dahae Kim, Ji-Young Kwon, Hak Cheol Kwon, Jaeyoung Jang, Dae Sik Kang, Ki Sung |
| Copyright Year | 2022 |
| Description | Herein, we determined whether α-Spinasterol, a stigmastane-type phytosterol isolated from Aster pseudoglehnii, potentially impacts glucose uptake and glucose-stimulated insulin secretion in skeletal muscle cells and pancreatic β-cells, respectively. We observed that A. pseudoglehnii and its fractions enhanced glucose uptake, with no toxic effects on C2C12 cells, with the n-hexane fraction exhibiting the most potent effect. α-Spinasterol, isolated from the n-hexane fraction, enhanced glucose uptake with no toxic effects on C2C12 cells. Additionally, α-Spinasterol increased the expression of associated proteins, including insulin receptor substrate-1, AMP-activated protein kinase, and glucose transporter type 4, as determined by Western blotting. Furthermore, α-Spinasterol enhanced insulin secretion in response to high glucose concentrations, with no toxic effects on INS-1 cells; this effect was superior to that demonstrated by gliclazide (positive control), commonly prescribed to treat type 2 diabetes (T2D). α-Spinasterol enhanced the expression of associated proteins, including insulin receptor substrate-2, peroxisome proliferator-activated receptor γ, and pancreatic and duodenal homeobox 1, as determined using Western blotting. The insulin secretory effect of α-Spinasterol was enhanced by a $K^{+}$ channel blocker and L-type $Ca^{2+}$ channel agonist and was suppressed by a $K^{+}$ channel activator and L-type $Ca^{2+}$ channel blocker. α-Spinasterol isolated from A. pseudoglehnii may improve hyperglycemia by improving glucose uptake into skeletal muscle cells and enhancing insulin secretion in pancreatic β-cells. Accordingly, α-Spinasterol could be a potential candidate for anti-T2D therapy. |
| Starting Page | 658 |
| e-ISSN | 22237747 |
| DOI | 10.3390/plants11050658 |
| Journal | Plants |
| Issue Number | 5 |
| Volume Number | 11 |
| Language | English |
| Publisher | MDPI |
| Publisher Date | 2022-02-28 |
| Access Restriction | Open |
| Subject Keyword | Plants Endocrinology and Metabolism Aster Pseudoglehnii Α-spinasterol Glucose-stimulated Insulin Secretion Glucose Uptake |
| Content Type | Text |
| Resource Type | Article |
