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http://dx.doi.org/10.9799/ksfan.2013.26.4.806

Effects of Agrimonia pilosa Ledeb. Water Extract on α-Glucosidase Inhibition and Glucose Uptake in C2C12 Skeletal Muscle Cells  

Kim, Sang-Mi (Functional Food & Nutrition Division, Department of Agrofood Resources, RDA)
Lee, Young Min (Functional Food & Nutrition Division, Department of Agrofood Resources, RDA)
Kim, Mi-Ju (Functional Food & Nutrition Division, Department of Agrofood Resources, RDA)
Nam, Song-Yee (Functional Food & Nutrition Division, Department of Agrofood Resources, RDA)
Kim, Sung-Hee (Functional Food & Nutrition Division, Department of Agrofood Resources, RDA)
Jang, Hwan-Hee (Functional Food & Nutrition Division, Department of Agrofood Resources, RDA)
Publication Information
The Korean Journal of Food And Nutrition / v.26, no.4, 2013 , pp. 806-813 More about this Journal
Abstract
Agrimonia pilosa Ledeb. is a medicinal plant with anti-tumor, anti-oxidant, anti-inflammatory and anti-hyperglycemic activities. However, few studies of the anti-diabetic effect of A. pilosa on insulin resistance status have been performed. In the present study, the anti-diabetic effect of A. pilosa water extract (AP) was determined by investigating its ${\alpha}$-glucosidase inhibitory property, glucose utilization, and uptake, as well as insulin resistance mechanism of action in C2C12 skeletal muscle cells. Compared to positive control (acarbose), AP ($10mg/m{\ell}$) showed a similar ${\alpha}$-glucosidase inhibitory capacity. Glucose uptake was significantly increased by $1{\mu}m$ insulin treatment (p<0.05). However, palmitic acid (FFA, 1 mM) induced muscle insulin resistance and glucose uptake dysfunction. On the other hand, AP ($10{\mu}g/m{\ell}$) was capable of reversing the FFA-induced insulin resistance in C2C12 myotubes. Compared to control, AP ($100{\mu}g/m{\ell}$ without insulin) significantly increased the utilization of glucose (p<0.05) in C2Cl2 myotubes cultured in normal glucose (7 mM). AP treatment significantly increased the relative mRNA and protein expression levels of Akt. In particular, the effect of A. pilosa on the insulin signaling system is associated with the up-regulation of Akt genes and glucose uptake in C2Cl2 myotubes. These results suggest that A. pilosa is useful in the prevention of diabetes and the treatment of hyperglycemic disorders.
Keywords
anti-diabetes; insulin resistance; skeletal muscle cells; 2-NBDG; Glut 4;
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