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Up-regulation of stearoyl-CoA desaturase 1 and elongase 6 genes expression in rat lipogenic tissues by chronic food restriction and chronic food restriction/refeeding

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Abstract

Successful treatment of obesity and related diseases by chronic food restriction requires the understanding of the effect of such nutritional therapy on the expression of genes which have been implicated to be involved in some diseases associated with obesity. The purpose of this study was to examine the effect of chronic food restriction and chronic food restriction/refeeding on lipogenic enzymes, especially the expression of genes encoding the stearoyl-CoA desaturase 1 (Scd1) and elongase6 (Elovl6) in rat liver and adipose tissue. We found that both chronic food restriction and chronic food restriction/refeeding caused increased expression of the Scd1 and Elovl6 genes in both the liver and adipose tissue. The increase was more pronounced in case of chronic food restriction/refeeding (several-fold increase) than that in chronic food restriction alone (two to threefold increase). Essentially, similar results were obtained when the expression of fatty acid synthase, acetyl-CoA carboxylase, ATP-citrate lyase, and malic enzyme genes was studied. Moreover, we found that chronic food restriction and short-term fasting exert opposite effects on the expression of lipogenic enzymes genes. The increased expression of the genes encoding Scd1, Elovl6, and other key lipogenic enzymes may favor fat storage after chronic food restriction/refeeding and may be part of the molecular mechanism by which food restriction/refeeding increases body weight and enhances susceptibility to insulin resistance.

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Acknowledgments

We are indebted to Professor M.M. Zydowo and Professor L. Zelewski for criticism and discussion about the manuscript. This study was supported by the Medical University of Gdansk (Grant—41).

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Authors and Affiliations

  1. Department of Biochemistry, Medical University of Gdansk, Debinki 1, 80-211, Gdansk, Poland

    Jacek Turyn & Julian Swierczynski

  2. Department of Gastroenterology and Hepatology, Medical University of Gdansk, 80-211, Gdansk, Poland

    Magdalena Stojek

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  1. Jacek Turyn
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  2. Magdalena Stojek
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Correspondence to Julian Swierczynski.

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Turyn, J., Stojek, M. & Swierczynski, J. Up-regulation of stearoyl-CoA desaturase 1 and elongase 6 genes expression in rat lipogenic tissues by chronic food restriction and chronic food restriction/refeeding. Mol Cell Biochem 345, 181–188 (2010). https://doi.org/10.1007/s11010-010-0571-x

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  • DOI: https://doi.org/10.1007/s11010-010-0571-x

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