Goodman R, Edgar D, Thoenen H, Wechsler W, Herschman H
J Cell Biol. 1978 Jul;78(1):R1-7. doi: 10.1083/jcb.78.1.r1.
We have established a continous cell line (G1) in which the tyrosine hydroxylase specific activity is increased as much as 50-100-fold in response to dexamethasone. This response is specific for the glucocorticoid class of steroid hormones; it is elicited by dexamethasone, corticosterone, and triamcinolone, but not by estradiol, testosterone, progesterone, or deoxycorticosterone acetate. The increase in tyrosine hydroxylase specific activity is likely to be due to the increased synthesis of new enzyme protein rather than an activation of existing protein molecules, inasmuch as this increase is completely blocked by cycloheximide.
我们已经建立了一个连续细胞系(G1),其中酪氨酸羟化酶的比活性在对地塞米松的反应中增加了50至100倍。这种反应对糖皮质激素类甾体激素具有特异性;地塞米松、皮质酮和曲安西龙能引发该反应,但雌二醇、睾酮、孕酮或醋酸脱氧皮质酮则不能。酪氨酸羟化酶比活性的增加可能是由于新酶蛋白合成增加,而非现有蛋白质分子的激活,因为这种增加被环己酰亚胺完全阻断。