Sympathomedullary activity in one-kidney, one clip hypertensive rats

K. Rácz, Otto Kuchel, Nguyen T. Buu, Raul Garcia

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

In order to evaluate more directly the implications of the sympatho-adrenal system in one-kidney, one clip hypertension (1K1C), we studied adrenal catecholamine synthesis after a bolus injection of3H-tyrosine, tissue norepinephrine and dopamine concentrations, as well as the urinary excretions of norepinephrine, epinephrine, dopamine and those of the major dopamine metabolites, dihydroxyphenylacetic acid (DOPAC) and homovanillic acid (HVA) in 1K1C and control uninephrectomized rats. When compared with controls, the hypertensive rats had a markedly enhanced formation of adrenal3H-norepinephrine and3H-epinephrine, higher urinary norepinephrine and epinephrine excretions but lower heart and kidney content of norepinephrine and dopamine as well as decreased urinary excretions of the main dopamine metabolites, DOPAC and HVA. These data suggest an increased norepinephrine and epinephrine synthesis in 1K1C hypertensive rats associated with dopamine synthesis, which is normal but probably disproportionally low relative to the synthesis of norepinephrine and epinephrine. This abnormality may be an important pathogenetic factor in this model of experimental hypertension.

Original languageEnglish
Pages (from-to)355-360
Number of pages6
JournalJournal of Hypertension
Volume4
Issue number3
Publication statusPublished - 1986

Fingerprint

Surgical Instruments
Norepinephrine
Dopamine
Kidney
Epinephrine
Homovanillic Acid
Hypertension
Acids
Catecholamines
Tyrosine
Theoretical Models
Injections

Keywords

  • Adrenal catecholamine synthesis
  • Dopamine
  • Dopamine metabolites norepinephrine
  • Epinephrine
  • Tissue catecholamines
  • Urinary catecholamine excretion

ASJC Scopus subject areas

  • Physiology
  • Cardiology and Cardiovascular Medicine
  • Internal Medicine
  • Endocrinology

Cite this

Sympathomedullary activity in one-kidney, one clip hypertensive rats. / Rácz, K.; Kuchel, Otto; Buu, Nguyen T.; Garcia, Raul.

In: Journal of Hypertension, Vol. 4, No. 3, 1986, p. 355-360.

Research output: Contribution to journalArticle

Rácz, K, Kuchel, O, Buu, NT & Garcia, R 1986, 'Sympathomedullary activity in one-kidney, one clip hypertensive rats', Journal of Hypertension, vol. 4, no. 3, pp. 355-360.
Rácz, K. ; Kuchel, Otto ; Buu, Nguyen T. ; Garcia, Raul. / Sympathomedullary activity in one-kidney, one clip hypertensive rats. In: Journal of Hypertension. 1986 ; Vol. 4, No. 3. pp. 355-360.
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