Modulation of obese gene expression in rat brown and white adipose tissues

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Abstract

The ob gene mRNA expression in rat brown adipose tissue (BAT) and epididymal white adipose tissue (WAT) was measured on Northern blots hybridized with a rat ob gene probe. The level of ob gene mRNA in BAT was about 40% of that in WAT. Fasting (36 h) or semi-starvation (10 days) decreased the ob gene mRNA level in both tissues by 62-68%, and cold exposure at 6°C (24 h) decreased it in BAT (-84%)_but not in WAT. Acute administration of the β3-adrenergic agonist Ro 16-8714 decreased the ob gene mRNA level in BAT (-51%) and WAT (-28%) of lean Zucker rats and only in BAT (-74%) of obese falfa rats. This study demonstrates that, in the rat, the ob gene is not only expressed in WAT but also in BAT, and suggests that in these two tissues, the modulation of the ob gene expression might be more closely associated with known alterations in cell lipid content than with changes in sympathetic activity. © 1995.

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Moinat, M., Deng, C., Muzzin, P., Assimacopoulos-Jeannet, F., Seydoux, J., Dulloo, A. G., & Giacobino, J. P. (1995). Modulation of obese gene expression in rat brown and white adipose tissues. FEBS Letters, 373(2), 131–134. https://doi.org/10.1016/0014-5793(95)01030-I

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