Enhancement of adrenomedullary catecholamine release by adrenal cortex in fetus

Cecilia Cheung

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Catecholamine (CA) release from ovine fetal adrenomedullary cells was greatly enhanced by coincubation with adrenocortical cells. Total CA release was significantly elevated at 2 and 6 h of preincubation by 7- and 2-fold, respectively. With continuous coincubation of the two cell types, the enhancement of release was found to occur as early as 30 min and maintained for at least 6 h. A similar enhancement effect was observed when adrenomedullary cells were incubated in adrenocortical cell incubation medium (ACM). The stimulation of release was demonstrated for each of the three CA: dopamine, norepinephrine, and epinephrine. The effect of adrenocortical cells differed from that of adrenal steroids, because cortisol selectively stimulated the release of epienphrine only by 1- to 3-fold after a latency of 6 to 9 h, whereas dehydroepiandrosterone had no effect on the release of the three CA at any time tested. Finally, the CA stimulatory activity in ACM was acid and heat stable, not extractable by ether but inactivated by proteolytic digestion. These results suggest that the adrenal cortex of the near-term ovine fetus secretes a factor that stimulates the release and perhaps synthesis of CA from the adrenal medulla.

Original languageEnglish (US)
JournalAmerican Journal of Physiology - Endocrinology and Metabolism
Volume10
Issue number5
StatePublished - 1984
Externally publishedYes

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Adrenal Cortex
Catecholamines
Fetus
Sheep
Dehydroepiandrosterone
Adrenal Medulla
Ether
Epinephrine
Hydrocortisone
Dopamine
Norepinephrine
Steroids
Digestion
Hot Temperature
Acids

ASJC Scopus subject areas

  • Biochemistry
  • Endocrinology
  • Physiology

Cite this

Enhancement of adrenomedullary catecholamine release by adrenal cortex in fetus. / Cheung, Cecilia.

In: American Journal of Physiology - Endocrinology and Metabolism, Vol. 10, No. 5, 1984.

Research output: Contribution to journalArticle

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