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Effects of aldosterone on lipid metabolism and renal oxygen consumption in the rat

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Summary

The plasma level of free fatty acids (FFA) in adrenalectomized rats increases by 50% after treatment with aldosterone (2 μg/100 g rat).

Lipolytic activity in peripheral fat tissue is lowered after adrenalectomy and doubles after in vivo administration of aldosterone to adrenalectomized rats (measured as free fatty acid release in vitro from epididymal fat tissue).

Lypolysis of adipose tissue stimulated by the in vitro presence of ACTH also increases after in vivo administration of aldosterone.

Incorporation of intravenously administered label from U14C-palmitate into total extractable lipid of renal tissue is augmented 3 h after aldosterone administration to adrenalectomized rats, while no increase of the radioactivity is observed in total lipid from liver tissue. Treatment with aldosterone does not affect the total lipid content of kidney or liver in adrenalectomized rats.

The oxygen consumption rate of kidney cortex slices with lactate, β-hydroxybuterate or acetoacetate as substrates is lowered after in vivo administration of aldosterone to adrenalectomized rats. With succinate, however, the respiratory rate of kidney slices increases after aldosterone treatment of adrenalectomized rats, the ouabain-sensitive respiration being more affected than the ouabain-insensitive respiration. An interpretation of the O2 consumption data implicating competition of lipid metabolism for CoA-SH is discussed.

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Authors and Affiliations

  1. Institut für Klinische Physiologie, Klinikum Steglitz der Freien Universität Berlin, Hindenburgdamm 30, D-1000, Berlin 45

    R. Kirsten, K. Nelson, U. Rüschendorf, W. Seger, TH. Scholz & E. Kirsten

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  1. R. Kirsten
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  2. K. Nelson
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  3. U. Rüschendorf
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  4. W. Seger
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  5. TH. Scholz
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  6. E. Kirsten
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Kirsten, R., Nelson, K., Rüschendorf, U. et al. Effects of aldosterone on lipid metabolism and renal oxygen consumption in the rat. Pflugers Arch. 368, 189–194 (1977). https://doi.org/10.1007/BF00585195

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  • DOI: https://doi.org/10.1007/BF00585195

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