Abstract
The effect of adrenalectomy on the formation of cyclooxygenase and lipoxygenase products from [1-14C]-arachidonic acid in rat kidneys after incubation with the Calcium-ionophore A23187 has been determined. The metabolites were isolated by HPLC. The main components formed are PGD2, PGE2, PGF22α LTB4, 5,12 di-HETE and 5-, 12- and 15-HETE. After adrenalectomy, an increase occurs in the formation of PG and LT, which is highest in that of PGD2 and 12-HETE. These effects are most probably related to a diminished formation or inactivation of lipocortin in adrenalectomized animals, a glucocorticosteroid induced peptide with phospholipase A2 inhibitory activity.
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