Abstract
59Fe was incorporated in vivo into intestinal sacs prepared in iron deficient rats and 59Fe counts were detected in blood, spleen, liver, femur and intestine. The i.v. injection of isoproterenol (i.v. 2 μg/rat) or N′,O′-dibutyryladenosine 3′,5′-cyclic monophosphate (10 μM/100 g b.w.) enhanced significantly the iron counts in blood, spleen, liver and femur but not in intestine. (−)-Propranolol (2 mg · kg−1 b.w.i.v.) antagonized the stimulatory effect of isoproterenol. It is suggested that isoproterenol increases iron absorption via the stimulation of β-adrenoreceptors of the intestinal mucosa.
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