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Open Access Research article

The roots of Atractylodes japonica Koidzumi promote adipogenic differentiation via activation of the insulin signaling pathway in 3T3-L1 cells

Yunkyung Han1, Hyo Won Jung1 and Yong-Ki Park12*

Author Affiliations

1 Oriental Medicine R&D Center, Dongguk University, Gyeongju, 780-714, Republic of Korea

2 Department of Herbology, College of Oriental Medicine, Dongguk University, Gyeongju, 780-714, Republic of Korea

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BMC Complementary and Alternative Medicine 2012, 12:154  doi:10.1186/1472-6882-12-154

Published: 14 September 2012

Abstract

Background

Type 2 diabetes (T2D) is a complex metabolic disorder characterized by insulin resistance and hyperglycemia. Peroxisome proliferator-activated receptor gamma (PPARγ) is a key transcription factor and plays an important role in the regulation of genes involved in adipogenic differentiation, glucose metabolism and insulin signal transduction.

Methods

In this study, the effects of the root extract of Atractylodes japonica Koidzumi (Atractylodis Rhizoma Alba, ARA) on the differentiation of 3T3-L1 preadipocytes and the possible mechanism of glucose transport were investigated. 3T3-L1 cells were cultured with insulin and ARA extract.

Results

In 3T3-L1 cells, ARA extract significantly enhanced adipogenic differentiation and upregulated the expression of PPARγ genes and protein in a dose-dependent manner. ARA also promoted glucose transport by increasing the glucose transporter 4 (GLUT-4), phosphatidylinositol 3-kinase (PI3K) and insulin receptor substrates-1 (IRS-1) levels.

Conclusion

Our results suggest that ARA extract may be an attractive therapeutic agent for managing T2D via promoting the differentiation of adipocytes with the upregulation of PPARγ levels and the activation of the insulin signaling pathway.

Keywords:
Atractylodes japonica; Atractylodis Rhizoma Alba; 3T3-L1 adipocyte; PPARγ; GLUT4; Insulin; Type 2 diabetes