2. Academic Validation
  3. Zaluzanin C Inhibits Differentiation of 3T3-L1 Preadipocytes into Mature Adipocytes

Zaluzanin C Inhibits Differentiation of 3T3-L1 Preadipocytes into Mature Adipocytes

  • J Obes Metab Syndr. 2019 Jun;28(2):105-111. doi: 10.7570/jomes.2019.28.2.105.
Sang Hee Kwak 1,  Yoon Hee Kim 1 2 3
Affiliations

Affiliations

  • 1 Department of Food and Nutrition, Daegu University, Gyeongsan, Korea.
  • 2 Research Institute of Anti-Aging, Daegu University, Gyeongsan, Korea.
  • 3 Institute of Industrial and Technology, Daegu University, Gyeongsan, Korea.
PMID: 31294342 DOI: 10.7570/jomes.2019.28.2.105
Abstract

Background: An excess storage of body fat causes obesity. Since obesity increases risk of chronic diseases, it is important to inhibit excessive storage of fat. Zaluzanin C is a sesquiterpene lactone isolated from Ainsliaea acerifolia. The aim of this study was to demonstrate the effect of zaluzanin C on differentiation of 3T3-L1 preadipocytes into mature adipocytes.

Methods: The cytotoxicity of zaluzanin C and its effect on cell proliferation was determined. For the induction of adipocyte differentiation, 3T3-L1 preadipocytes were treated with differentiating medium containing 10 μg/mL Insulin, 115 μg/mL methylisobutylxanthine, and 1 μM dexamethasone. Differentiated 3T3-L1 cells were subjected to Oil red O solution or used for Western blot analysis. Zaluzanin C was added to the Cell Culture medium at concentrations of 0, 1, 2.5, 5, and 10 μM.

Results: Zaluzanin C did not inhibit cell proliferation and showed no cytotoxicity at 10 μM concentration in 3T3-L1 cells. Therefore, concentration range of 0-10 μM zaluzanin C was used for subsequent experiments. Zaluzanin C inhibited accumulation of lipid droplets in 3T3-L1 adipocytes. To understand the underlying mechanism of zaluzanin C, expression of adipogenesis regulators was determined by Western blot analysis. Zaluzanin C suppressed Peroxisome Proliferator-activated Receptor gamma (PPARγ) expression, an adipogenesis related transcription factor, and inhibited aP2/fatty acid-binding protein-4 expression, a target gene of PPARγ. However, it did not affect expression of CCAAT/enhancer-binding protein alpha related with acquisition of Insulin sensitivity.

Conclusion: These data suggest that inhibitory effect of zaluzanin C on adipogenesis of 3T3-L1 adipocytes could be partially caused by suppressing PPARγ.

Keywords

3T3-L1 cell; Lactone; Proliferator-activated receptor gamma; Zaluzanin C.

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