Journal
JOURNAL OF FOOD SCIENCE
Volume 79, Issue 7, Pages H1424-H1429Publisher
WILEY
DOI: 10.1111/1750-3841.12465
Keywords
fucosylated chondroitin sulfate; insulin sensitivity; phosphoinositide 3-kinase; protein kinase B; sea cucumber
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Funding
- Natl. Marine Public Welfare Scientific Research Project of China [201105029]
- Natl. Science and Technology Support Program of China [2012BAD33B07]
- Natl. Natural Science Foundation of China [31371876]
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This study was to investigate the effects of fucosylated chondroitin sulfate (CHS) from sea cucumber on insulin sensitivity in skeletal muscle of type 2 diabetic mice induced by a high-fat high-sucrose diet (HFSD). CHS supplementation for 19 wk significantly improved insulin sensitivity by 20%, and reduced blood glucose and insulin levels. Western blotting assay showed that CHS significantly increased insulin-stimulated glucose transporter 4 (GLUT4) translocation to 1.7-fold, phosphorylation of phosphoinositide 3-kinase (PI3K) at p85 to 5.0-fold, protein kinase B (PKB) at Ser473 to 1.5-fold, and Thr308 to 1.6-fold in skeletal muscle. However, PI3K, PKB, and GLUT4 total proteins expression were unchangeable. In addition, qRT-PCR analysis proved that the insulin signaling was activated by CHS treatment, showing the increased mRNA expressions of glucose uptake-related key genes. It indicated that CHS improved insulin sensitivity by activation of PI3K/PKB signaling in skeletal muscle of type 2 diabetic mice. Identification of potential mechanism by which CHS increased insulin sensitivity might provide a new functional food or pharmaceutical application of sea cucumber.
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