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Related Experiment Videos

Multiple renin forms in the adrenal gland.

S H Kim1, F M Sessler, R L Malvin

  • 1Department of Physiology, University of Michigan, Ann Arbor 48109.

The American Journal of Physiology
|October 1, 1988
PubMed
Summary

Adrenal glands produce distinct renin forms, differing from plasma renin. These adrenal renin forms change with salt balance, suggesting endogenous adrenal production of renin.

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Area of Science:

  • Endocrinology
  • Renal Physiology
  • Biochemistry

Background:

  • Renin heterogeneity is recognized in rat kidney and plasma.
  • The adrenal gland's role in renin production and heterogeneity remains incompletely understood.

Purpose of the Study:

  • To characterize adrenal renin forms in rats under varying dietary sodium and physiological conditions.
  • To compare adrenal renin forms with plasma renin forms.
  • To investigate the influence of salt and water balance on adrenal renin heterogeneity.

Main Methods:

  • Isoelectric focusing was employed to analyze renin forms in adrenal and plasma samples.
  • Active renin (AR) and inactive trypsin-activatable renin (IR) were quantified.
  • Renin activation was performed before or after isoelectric focusing to identify IR-derived forms.

Main Results:

  • Adrenal glands contain both active and inactive renin forms.
  • Adrenal active renin significantly increased with a low-sodium diet but remained unchanged with nephrectomy or high-sodium intake.
  • Adrenal renin forms exhibited different proportions compared to plasma renin, with distinct IR-derived forms identified in the adrenal gland.

Conclusions:

  • Adrenal glands possess unique renin forms, distinct from plasma renin.
  • Alterations in salt and water balance differentially affect adrenal and plasma renin forms.
  • Findings support the hypothesis of endogenous renin production by the adrenal gland.

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