Journal of Ginseng Research

The Korean Society of Ginseng (고려인삼학회)
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The effect of Korean Red Ginseng extract on rosiglitazone-induced improvement of glucose regulation in diet-induced obese mice

  • Oh, Mi-Jeong (Department of Pharmacology, Korea University College of Medicine) ;
  • Kim, Hyun-Ju (Department of Pharmacology, Korea University College of Medicine) ;
  • Park, Eun-Young (Department of Pharmacology, Korea University College of Medicine) ;
  • Ha, Na-Hee (Department of Pharmacology, Korea University College of Medicine) ;
  • Song, Mun-Gyu (Department of Pharmacology, Korea University College of Medicine) ;
  • Choi, Sang-Hyun (Department of Pharmacology, Korea University College of Medicine) ;
  • Chun, Boe-Gwun (Department of Pharmacology, Korea University College of Medicine) ;
  • Kim, Dong-Hoon (Department of Pharmacology, Korea University College of Medicine)
  • Received : 2015.09.30
  • Accepted : 2015.12.30
  • Published : 2017.01.15
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Abstract

Background: Korean Red Ginseng extract (KRG, Panax ginseng Meyer) and its constituents have been used for treating diabetes. However, in diet-induced obese mice, it is unclear whether KRG can enhance the glucose-lowering action of rosiglitazone (ROSI), a peroxisome proliferator-activated receptor gamma synthetic activator. Methods: Oral glucose tolerance tests (oGTTs) were performed after 4 days of treatment with a vehicle (CON), KRG [500 mg/kg body weight (b.w.)], ROSI (3.75 mg/kg b.w, 7.5 mg/kg b.w, and 15 mg/kg b.w.), or ROSI and KRG (RK) in obese mice on a high-fat diet. Adipose tissue morphology, crown-like structures (CLSs), and inflammation were compared by hematoxylin-eosin staining or quantitative reverse transcription polymerase chain reaction. Results: The area under the glucose curve (AUC) was significantly lower in the RK group (15 mg/kg b.w. and 500 mg/kg b.w. for ROSI and KRG, respectively) than in the CON group. There was no significant difference in the AUC between the CON and the other groups. Furthermore, the AUC was significantly lower in the RK group than in the ROSI group. The expression of the Ccl2 gene and the number of CLSs were significantly reduced in the RK group than in the CON group. Conclusion: Our results show a potential enhancement of ROSI-induced improvement of glucose regulation by the combined treatment with KRG.

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References

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