Abstract
Urinary epidermal growth factor (EGF) has been demonstrated recently to originate from the kidneys. The present study was undertaken to investigate the adrenergic and cholinergic influence on secretion of renal EGF. beta-Adrenergic agonists increased the level of urinary EGF, while propranolol, a beta-adrenergic blocking agent, decreased basal and beta-adrenergic stimulated total output of urinary EGF. Acetylcholine and the anticholinergic agent atropine had no effect on the output of EGF in urine. Also chemical sympathectomy induced by 6-hydroxydopamine reduced the urinary output of EGF. None of the experimental groups had a median serum concentration above the detection limit of the assay. The present study shows that secretion of renal EGF is under the influence of the sympathetic nervous system and release of EGF is stimulated by activation of beta-adrenergic receptors in the kidneys.
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