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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Regulation of aldosterone biosynthesis by adrenal renin is mediated through AT1 receptors in renin transgenic rats.

The transgenic (TG) rat (mREN2)27 is characterized by overexpression of the additional mouse Ren-2d gene in the adrenal cortex with marked suppression of renal renin. We have previously shown that in salt-depleted TG rats enhanced activation of mineralocorticoid biosynthesis is associated with selective stimulation of adrenal renin. To investigate whether the local renin-angiotensin system regulates aldosterone biosynthesis in the adrenal cortex of TG rats, we studied the effects of the AT1-angiotensin subtype receptor antagonist DuP 753 on aldosterone production in 5-week-old TG rats during salt restriction. All the rats (n = 56) were shifted from regular chow to a diet containing only 0.04% NaCl for 1 week. The AT1-receptor antagonist DuP 753 (10 mg/kg per day in drinking water) was administered to 27 of these rats during low-salt diet. Subgroups of rats were killed at 0,4, and 7 days. Low-salt diet increased both adrenal renin activity (from 31 +/- 3 to 77 +/- 4 and 85 +/- 2 ng angiotensin I.h-1.mg protein-1 at 4 and 7 days, respectively; P < .001) and mRNA (by 68.4 +/- 10% and 80 +/- 17% from baseline, P < .05).(ABSTRACT TRUNCATED AT 250 WORDS)[1]

References

  1. Regulation of aldosterone biosynthesis by adrenal renin is mediated through AT1 receptors in renin transgenic rats. Volpe, M., Rubattu, S., Gigante, B., Ganten, D., Porcellini, A., Russo, R., Romano, M., Enea, I., Lee, M.A., Trimarco, B. Circ. Res. (1995) [Pubmed]
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