Fucoidan ameliorates pancreatic β-cell death and impaired insulin synthesis in streptozotocin-treated β cells and mice via a Sirt-1-dependent manner

Wen Chun Yu, Yen Lin Chen, Pai An Hwang, Tso Hsiao Chen, Tz Chong Chou

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Scope: Several beneficial biological functions of fucoidan (FO) isolated from brown algae have been demonstrated. The purpose of this study was to investigate whether FO derived from Sargassum hemiphyllum ameliorates pancreatic β-cell damage and impaired insulin synthesis under diabetic condition. Methods and results: The effects of FO were studied in streptozotocin (STZ)-treated pancreatic β-cell line, NIT-1cells, and mice. The cell apoptosis, protein analyses, histological examination, and pancreatic function assays were performed. The increased pancreatic β-cell apoptosis and decreased insulin secretion observed in STZ-treated NIT-1 cells and mice were greatly attenuated by FO. Moreover, FO has an ability to enhance glucagon-like peptide-1 receptor (GLP-1R) and sirtuin 1 (Sirt-1) activity through activation of AMPK/GAPDH/PDX-1 cascade in STZ-treated β cells. However, the effects of FO were significantly reversed by EX527, a specific Sirt-1 inhibitor. Similarly, the hyperglycemia, lower expression of Sirt-1, PDX-1, and GLP-1R in the pancreas of diabetic mice were markedly improved after FO administration. Conclusion: We demonstrated that FO exhibits an anti-diabetic effect mainly through attenuation of β-cell death, thereby elevating insulin synthesis by upregulating PDX-1 and GLP1-R via a Sirt-1-dependent manner. Therefore, FO-containing food or supplements may have a therapeutic effect for diabetes by preventing β-cell damage and dysfunction.

Original languageEnglish
JournalMolecular Nutrition and Food Research
DOIs
Publication statusAccepted/In press - 2017

Fingerprint

Sirtuin 1
fucoidan
streptozotocin
Streptozocin
cell death
Cell Death
insulin
Insulin
synthesis
mice
cells
apoptosis
Sargassum
Apoptosis
Phaeophyta
glycemic effect
AMP-Activated Protein Kinases
Phaeophyceae
insulin secretion
Therapeutic Uses

Keywords

  • Diabetes
  • Fucoidan
  • Glucagon-like peptide-1 receptor
  • Insulin
  • Pancreatic β cells
  • Sirt-1

ASJC Scopus subject areas

  • Biotechnology
  • Food Science

Cite this

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title = "Fucoidan ameliorates pancreatic β-cell death and impaired insulin synthesis in streptozotocin-treated β cells and mice via a Sirt-1-dependent manner",
abstract = "Scope: Several beneficial biological functions of fucoidan (FO) isolated from brown algae have been demonstrated. The purpose of this study was to investigate whether FO derived from Sargassum hemiphyllum ameliorates pancreatic β-cell damage and impaired insulin synthesis under diabetic condition. Methods and results: The effects of FO were studied in streptozotocin (STZ)-treated pancreatic β-cell line, NIT-1cells, and mice. The cell apoptosis, protein analyses, histological examination, and pancreatic function assays were performed. The increased pancreatic β-cell apoptosis and decreased insulin secretion observed in STZ-treated NIT-1 cells and mice were greatly attenuated by FO. Moreover, FO has an ability to enhance glucagon-like peptide-1 receptor (GLP-1R) and sirtuin 1 (Sirt-1) activity through activation of AMPK/GAPDH/PDX-1 cascade in STZ-treated β cells. However, the effects of FO were significantly reversed by EX527, a specific Sirt-1 inhibitor. Similarly, the hyperglycemia, lower expression of Sirt-1, PDX-1, and GLP-1R in the pancreas of diabetic mice were markedly improved after FO administration. Conclusion: We demonstrated that FO exhibits an anti-diabetic effect mainly through attenuation of β-cell death, thereby elevating insulin synthesis by upregulating PDX-1 and GLP1-R via a Sirt-1-dependent manner. Therefore, FO-containing food or supplements may have a therapeutic effect for diabetes by preventing β-cell damage and dysfunction.",
keywords = "Diabetes, Fucoidan, Glucagon-like peptide-1 receptor, Insulin, Pancreatic β cells, Sirt-1",
author = "Yu, {Wen Chun} and Chen, {Yen Lin} and Hwang, {Pai An} and Chen, {Tso Hsiao} and Chou, {Tz Chong}",
year = "2017",
doi = "10.1002/mnfr.201700136",
language = "English",
journal = "Molecular Nutrition and Food Research",
issn = "1613-4125",
publisher = "Wiley-VCH Verlag",

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TY - JOUR

T1 - Fucoidan ameliorates pancreatic β-cell death and impaired insulin synthesis in streptozotocin-treated β cells and mice via a Sirt-1-dependent manner

AU - Yu, Wen Chun

AU - Chen, Yen Lin

AU - Hwang, Pai An

AU - Chen, Tso Hsiao

AU - Chou, Tz Chong

PY - 2017

Y1 - 2017

N2 - Scope: Several beneficial biological functions of fucoidan (FO) isolated from brown algae have been demonstrated. The purpose of this study was to investigate whether FO derived from Sargassum hemiphyllum ameliorates pancreatic β-cell damage and impaired insulin synthesis under diabetic condition. Methods and results: The effects of FO were studied in streptozotocin (STZ)-treated pancreatic β-cell line, NIT-1cells, and mice. The cell apoptosis, protein analyses, histological examination, and pancreatic function assays were performed. The increased pancreatic β-cell apoptosis and decreased insulin secretion observed in STZ-treated NIT-1 cells and mice were greatly attenuated by FO. Moreover, FO has an ability to enhance glucagon-like peptide-1 receptor (GLP-1R) and sirtuin 1 (Sirt-1) activity through activation of AMPK/GAPDH/PDX-1 cascade in STZ-treated β cells. However, the effects of FO were significantly reversed by EX527, a specific Sirt-1 inhibitor. Similarly, the hyperglycemia, lower expression of Sirt-1, PDX-1, and GLP-1R in the pancreas of diabetic mice were markedly improved after FO administration. Conclusion: We demonstrated that FO exhibits an anti-diabetic effect mainly through attenuation of β-cell death, thereby elevating insulin synthesis by upregulating PDX-1 and GLP1-R via a Sirt-1-dependent manner. Therefore, FO-containing food or supplements may have a therapeutic effect for diabetes by preventing β-cell damage and dysfunction.

AB - Scope: Several beneficial biological functions of fucoidan (FO) isolated from brown algae have been demonstrated. The purpose of this study was to investigate whether FO derived from Sargassum hemiphyllum ameliorates pancreatic β-cell damage and impaired insulin synthesis under diabetic condition. Methods and results: The effects of FO were studied in streptozotocin (STZ)-treated pancreatic β-cell line, NIT-1cells, and mice. The cell apoptosis, protein analyses, histological examination, and pancreatic function assays were performed. The increased pancreatic β-cell apoptosis and decreased insulin secretion observed in STZ-treated NIT-1 cells and mice were greatly attenuated by FO. Moreover, FO has an ability to enhance glucagon-like peptide-1 receptor (GLP-1R) and sirtuin 1 (Sirt-1) activity through activation of AMPK/GAPDH/PDX-1 cascade in STZ-treated β cells. However, the effects of FO were significantly reversed by EX527, a specific Sirt-1 inhibitor. Similarly, the hyperglycemia, lower expression of Sirt-1, PDX-1, and GLP-1R in the pancreas of diabetic mice were markedly improved after FO administration. Conclusion: We demonstrated that FO exhibits an anti-diabetic effect mainly through attenuation of β-cell death, thereby elevating insulin synthesis by upregulating PDX-1 and GLP1-R via a Sirt-1-dependent manner. Therefore, FO-containing food or supplements may have a therapeutic effect for diabetes by preventing β-cell damage and dysfunction.

KW - Diabetes

KW - Fucoidan

KW - Glucagon-like peptide-1 receptor

KW - Insulin

KW - Pancreatic β cells

KW - Sirt-1

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SN - 1613-4125

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