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Article
The Trans-10,cis-12 Isomer of Conjugated Linoleic Acid Downregulates Stearoyl-CoA Desaturase Gene Expression in 3T3-L1 Adipocytes
Journal of Nutrition (2000)
  • Yeonhwa Park, University of Massachusetts - Amherst
Abstract
Conjugated linoleic acids (CLA) are a group of positional and geometric conjugated dienoic isomers of linoleic acid. The objective of this study was to determine the effects of the cis-9,trans-11 and trans-10,cis-12 isomers of conjugated linoleic acid on lipid composition and gene expression during the differentiation of mouse 3T3-L1 preadipocytes. Treatment of differentiating 3T3-L1 preadipocytes with trans-10,cis-12 conjugated linoleic acid (CLA) resulted in a dose-dependent decrease in the expression of the stearoyl-CoA desaturase 1 gene (SCD1). The expression of other adipocyte genes such as adipose P2 (aP2), fatty acid synthase (FAS), SCD2 and the key adipogenic transcription factors, peroxisome proliferator-activated receptor gamma2 (PPARgamma2) and CCAAT enhancer binding protein alpha (C/EBPalpha), remained elevated. Cells treated with trans-10,cis-12 CLA exhibited smaller lipid droplets, with reduced levels of the major monounsaturated fatty acids, palmitoleate and oleate. By contrast, the cis-9,trans-11 isomer did not alter adipocyte gene expression. Repression of the stearoyl-CoA desaturase gene expression in adipocytes by the trans-10,cis-12 isomer may contribute to the mechanisms by which CLA reduces body fat in mice.
Disciplines
Publication Date
2000
Citation Information
Yeonhwa Park. "The Trans-10,cis-12 Isomer of Conjugated Linoleic Acid Downregulates Stearoyl-CoA Desaturase Gene Expression in 3T3-L1 Adipocytes" Journal of Nutrition Vol. 130 (2000)
Available at: http://works.bepress.com/yeonhwa_park/44/