Details

Autor(en) / Beteiligte

• Jönsson, Ann-Cathrine
• Wahlqvist, Inger
• Hansson, Tiiu

Titel

Effects of hypophysectomy and cortisol on the catecholamine biosynthesis and catecholamine content in chromaffin tissue from rainbow trout, Salmo gairdneri

Ist Teil von

• General and comparative endocrinology, 1983-01, Vol.51 (2), p.278-285

Ort / Verlag

San Diego, CA: Elsevier Inc

Erscheinungsjahr

1983

Quelle

Elsevier Journal Backfiles on ScienceDirect (DFG Nationallizenzen)

Beschreibungen/Notizen

• The in vitro activities of dopamine β-hydroxylase (DBH) and phenylethanolamine N-methyltransferase (PNMT) were determined in the chromaffin tissue of hypophysectomized and cortisol-treated rainbow trout, Salmo gairdneri. In addition, the content of adrenaline and noradrenaline was estimated. DBH activity increased after both hypophysectomy and cortisol administration. The increased activity after hypophysectomy was restored with administration of pituitary extract, ADP. The PNMT activity seemed to increase slightly after hypophysectomy, while the activity remained unchanged after cortisol administration. A small decrease in catecholamine content was seen after hypophysectomy or treatment with cortisol but the A NA ratio was not changed. A regulation of the biosynthesis of catecholamines in trout chromaffin tissue is suggested and discussed in relation to mammalian conditions.