Annals of dermatology

Korean Dermatological Association (대한피부과학회)
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Inhibitory Effect of Vitamin U (S-Methylmethionine Sulfonium Chloride) on Differentiation in 3T3-L1 Pre-adipocyte Cell Lines

  • Lee, Na Young (Arumdaun Nara Skin Clinic) ;
  • Park, Kui Young (Department of Dermatology, Chung-Ang University College of Medicine) ;
  • Min, Hye Jung (Department of Pathology, Chung-Ang University College of Medicine) ;
  • Song, Kye Yong (Department of Pathology, Chung-Ang University College of Medicine) ;
  • Lim, Yun Young (Department of Dermatology, Chung-Ang University College of Medicine) ;
  • Park, Juhee (Department of Dermatology, Chung-Ang University College of Medicine) ;
  • Kim, Beom Joon (Department of Dermatology, Chung-Ang University College of Medicine) ;
  • Kim, Myeung Nam (Department of Dermatology, Chung-Ang University College of Medicine)
  • Published : 2012.02.29
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Abstract

Background: S-methylmethionine sulfonium chloride was originally called vitamin U because of its inhibition of ulceration in the digestive system. Vitamin U is ubiquitously expressed in the tissues of flowering plants, and while there have been reports on its hypolipidemic effect, its precise function remains unknown. Objective: This study was designed to evaluate the anti-obesity effect of vitamin U in 3T3-L1 pre-adipocyte cell lines. Methods: We cultured the pre-adipocyte cell line 3T3L1 to overconfluency and then added fat differentiation-inducing media (dexamethasone, IBMX [isobutylmethylxanthine], insulin, indomethacin) and different concentrations (10, 50, 70, 90, 100 mM) of vitamin U. Then, we evaluated changes in the levels of triglycerides (TGs), glycerol-3-phosphate dehydrogenase (G3PDH), AMP-activated protein kinase (AMPK), adipocyte-specific markers (peroxisome proliferator-activated receptor $\gamma$ [PPAR-$\gamma$], CCAAT/enhancer-binding protein $\alpha$ [C/EBP-$\alpha$], adipocyte differentiation and determination factor 1 [ADD-1], adipsin, fatty acid synthase, lipoprotein lipase) and apoptosis-related signals (Bcl-2, Bax). Results: There was a gradual decrease in the level of TGs, C/EBP-$\alpha$, PPAR-$\gamma$, adipsin, ADD-1 and GPDH activity with increasing concentrations of vitamin U. In contrast, we observed a significant increase in AMPK activity with increasing levels of vitamin U. The decrease in bcl-2 and increase in Bax observed with increasing concentrations of vitamin U in the media were not statistically significant. Conclusion: This study suggests that vitamin U inhibits adipocyte differentiation via downregulation of adipogenic factors and up-regulation of AMPK activity.

Keywords

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