Schisandrin C Affects Glucose-Stimulated Insulin Secretion in Pancreatic β-Cells and Glucose Uptake in Skeletal Muscle Cells
The aim of our study was to investigate the effect of three lignans (schisandrol A, schisandrol B, and schisandrin C) on insulin secretion in rat INS-1 pancreatic β-cells and glucose uptake in mouse C2C12 skeletal muscle cells. Schisandrol A and schisandrin C enhanced insulin secretion in response t...
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2021
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oai:doaj.org-article:7ffd087582584124af668994bd5dc60b2021-11-11T18:30:17ZSchisandrin C Affects Glucose-Stimulated Insulin Secretion in Pancreatic β-Cells and Glucose Uptake in Skeletal Muscle Cells10.3390/molecules262165091420-3049https://doaj.org/article/7ffd087582584124af668994bd5dc60b2021-10-01T00:00:00Zhttps://www.mdpi.com/1420-3049/26/21/6509https://doaj.org/toc/1420-3049The aim of our study was to investigate the effect of three lignans (schisandrol A, schisandrol B, and schisandrin C) on insulin secretion in rat INS-1 pancreatic β-cells and glucose uptake in mouse C2C12 skeletal muscle cells. Schisandrol A and schisandrin C enhanced insulin secretion in response to high glucose levels with no toxic effects on INS-1 cells. The effect of schisandrin C was superior to that of gliclazide (positive control), a drug commonly used to treat type 2 diabetes (T2D). In addition, western blot analysis showed that the expression of associated proteins, including peroxisome proliferator-activated receptor γ (PPARγ), pancreatic and duodenal homeobox 1 (PDX-1), phosphatidylinositol 3-kinase (PI3K), Akt, and insulin receptor substrate-2 (IRS-2), was increased in INS-1 cells after treatment with schisandrin C. In addition, insulin secretion effect of schisandrin C were enhanced by the Bay K 8644 (L-type Ca<sup>2+</sup> channel agonist) and glibenclamide (K<sup>+</sup> channel blocker), were abolished by the nifedipine (L-type Ca<sup>2+</sup> channel blocker) and diazoxide (K<sup>+</sup> channel activator). Moreover, schisandrin C enhanced glucose uptake with no toxic effects on C2C12 cells. Western blot analysis showed that the expression of associated proteins, including insulin receptor substrate-1 (IRS-1), AMP-activated protein kinase (AMPK), PI3K, Akt, glucose transporter type 4 (GLUT-4), was increased in C2C12 cells after treatment with schisandrin C. Schisandrin C may improve hyperglycemia by enhancing insulin secretion in pancreatic β-cells and improving glucose uptake into skeletal muscle cells. Our findings may provide evidence that schisandrin C may be beneficial in devising novel anti-T2D strategies.Dahae LeeYoung-Mi KimHyun Woo KimYou-Kyoung ChoiBang Ju ParkSang Hoon JooKi Sung KangMDPI AGarticleschisandrin Cglucose-stimulated insulin secretionglucose uptakePDX-1GLUT-4Organic chemistryQD241-441ENMolecules, Vol 26, Iss 6509, p 6509 (2021) |
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schisandrin C glucose-stimulated insulin secretion glucose uptake PDX-1 GLUT-4 Organic chemistry QD241-441 |
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schisandrin C glucose-stimulated insulin secretion glucose uptake PDX-1 GLUT-4 Organic chemistry QD241-441 Dahae Lee Young-Mi Kim Hyun Woo Kim You-Kyoung Choi Bang Ju Park Sang Hoon Joo Ki Sung Kang Schisandrin C Affects Glucose-Stimulated Insulin Secretion in Pancreatic β-Cells and Glucose Uptake in Skeletal Muscle Cells |
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The aim of our study was to investigate the effect of three lignans (schisandrol A, schisandrol B, and schisandrin C) on insulin secretion in rat INS-1 pancreatic β-cells and glucose uptake in mouse C2C12 skeletal muscle cells. Schisandrol A and schisandrin C enhanced insulin secretion in response to high glucose levels with no toxic effects on INS-1 cells. The effect of schisandrin C was superior to that of gliclazide (positive control), a drug commonly used to treat type 2 diabetes (T2D). In addition, western blot analysis showed that the expression of associated proteins, including peroxisome proliferator-activated receptor γ (PPARγ), pancreatic and duodenal homeobox 1 (PDX-1), phosphatidylinositol 3-kinase (PI3K), Akt, and insulin receptor substrate-2 (IRS-2), was increased in INS-1 cells after treatment with schisandrin C. In addition, insulin secretion effect of schisandrin C were enhanced by the Bay K 8644 (L-type Ca<sup>2+</sup> channel agonist) and glibenclamide (K<sup>+</sup> channel blocker), were abolished by the nifedipine (L-type Ca<sup>2+</sup> channel blocker) and diazoxide (K<sup>+</sup> channel activator). Moreover, schisandrin C enhanced glucose uptake with no toxic effects on C2C12 cells. Western blot analysis showed that the expression of associated proteins, including insulin receptor substrate-1 (IRS-1), AMP-activated protein kinase (AMPK), PI3K, Akt, glucose transporter type 4 (GLUT-4), was increased in C2C12 cells after treatment with schisandrin C. Schisandrin C may improve hyperglycemia by enhancing insulin secretion in pancreatic β-cells and improving glucose uptake into skeletal muscle cells. Our findings may provide evidence that schisandrin C may be beneficial in devising novel anti-T2D strategies. |
format |
article |
author |
Dahae Lee Young-Mi Kim Hyun Woo Kim You-Kyoung Choi Bang Ju Park Sang Hoon Joo Ki Sung Kang |
author_facet |
Dahae Lee Young-Mi Kim Hyun Woo Kim You-Kyoung Choi Bang Ju Park Sang Hoon Joo Ki Sung Kang |
author_sort |
Dahae Lee |
title |
Schisandrin C Affects Glucose-Stimulated Insulin Secretion in Pancreatic β-Cells and Glucose Uptake in Skeletal Muscle Cells |
title_short |
Schisandrin C Affects Glucose-Stimulated Insulin Secretion in Pancreatic β-Cells and Glucose Uptake in Skeletal Muscle Cells |
title_full |
Schisandrin C Affects Glucose-Stimulated Insulin Secretion in Pancreatic β-Cells and Glucose Uptake in Skeletal Muscle Cells |
title_fullStr |
Schisandrin C Affects Glucose-Stimulated Insulin Secretion in Pancreatic β-Cells and Glucose Uptake in Skeletal Muscle Cells |
title_full_unstemmed |
Schisandrin C Affects Glucose-Stimulated Insulin Secretion in Pancreatic β-Cells and Glucose Uptake in Skeletal Muscle Cells |
title_sort |
schisandrin c affects glucose-stimulated insulin secretion in pancreatic β-cells and glucose uptake in skeletal muscle cells |
publisher |
MDPI AG |
publishDate |
2021 |
url |
https://doaj.org/article/7ffd087582584124af668994bd5dc60b |
work_keys_str_mv |
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