Dairman W
Br J Pharmacol. 1972 Feb;44(2):307-10. doi: 10.1111/j.1476-5381.1972.tb07268.x.
The concentrations of tyrosine in rat plasma and brain were increased 2-7 fold by the administration of either L-tyrosine or cycloheximide. Under these conditions catecholamine concentrations in the brain and the heart remained unchanged even when the rats were maintained in a cold environment to increase catecholamine turnover. The data are interpreted to mean that an increase in the tyrosine concentration in the tissues does not result in an in vivo substrate inhibition of tyrosine hydroxylase.
给予L-酪氨酸或环己酰亚胺后,大鼠血浆和脑中酪氨酸的浓度增加了2至7倍。在这些条件下,即使将大鼠置于寒冷环境中以增加儿茶酚胺周转率,脑和心脏中的儿茶酚胺浓度仍保持不变。这些数据被解释为意味着组织中酪氨酸浓度的增加不会导致体内酪氨酸羟化酶的底物抑制。