Glucagon Phosphorylates Serine 552 Of Beta-Catenin Leading To Increased Expression Of Cyclin D1 And C-Myc In The Isolated Rat Liver
ARCHIVES OF PHYSIOLOGY AND BIOCHEMISTRY(2015)
Abstract
In the last 20 years the prevalence of metabolic disorders, in particular type 2 diabetes (T2D), has more than doubled. Recently, a strong link between T2D and cancer, in particularly liver cancer has been reported. However, the mechanism connecting the development of type 2 diabetes and cancer remains unknown. One of the biggest drivers of liver cancer is alterations in the Wnt/beta-catenin pathway. In this study, we aimed to identify the effect of glucagon on beta-catenin in the isolated rat liver. We found glucagon, which is substantially raised in patients with T2D, rapidly phosphorylates beta-catenin on serine 552 that is associated with increased expression of genes cyclin D1 (CCND1) and c-Myc (MYC), which are known to be involved in liver cancer. This finding may explain the increased risk of liver cancer in people with T2D.
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Key words
beta-Catenin,cancer,glucagon,T2D
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