Abstract：
:Cyanidin is a natural anthocyanidin present in fruits and vegetables with anti-diabetic properties including stimulation of insulin secretion. However, its mechanism of action remains unknown. In this study, we elucidated the mechanisms of cyanidin for stimulatory insulin secretion from pancreatic β-cells. Rat pancreatic β-cells INS-1 were used to investigate the effects of cyanidin on insulin secretion, intracellular Ca2+ signaling, and gene expression. We detected the presence of cyanidin in the intracellular space of β-cells. Cyanidin stimulated insulin secretion and increased intracellular Ca2+ signals in a concentration-dependent manner. The Ca2+ signals were abolished by nimodipine, an l-type voltage-dependent Ca2+ channel (VDCC) blocker or under extracellular Ca2+ free conditions. Stimulation of cells with cyanidin activated currents typical for VDCCs and up-regulated the expression of glucose transporter 2 (GLUT2), Kir6.2, and Cav1.2 genes. Our findings indicate that cyanidin diffuses across the plasma membrane, leading to activation of l-type VDCCs. The increase in intracellular Ca2+ stimulated insulin secretion and the expression of genes involved in this process. These findings suggest that cyanidin could be used as a promising agent to stimulate insulin secretion.
journal_name
Nutrientsjournal_title
Nutrientsauthors
Suantawee T,Elazab ST,Hsu WH,Yao S,Cheng H,Adisakwattana Sdoi
10.3390/nu9080814subject
Has Abstractpub_date
2017-07-28 00:00:00issue
8issn
2072-6643pii
nu9080814journal_volume
9pub_type
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