Huang D P, Maine A B, Chiu J F
Cancer Lett. 1984 Mar;22(2):143-9. doi: 10.1016/0304-3835(84)90111-3.
The activity of tyrosine aminotransferase (TAT) decreased biphasically in livers of rats fed 3'-methyl-4-dimethylaminoazobenzene (3'-MDAB). TAT activity decreased to an extremely low level at later stages of hepatocarcinogenesis. The activity of TAT is negatively correlated with alpha-fetoprotein (AFP) levels. The level of TAT enzyme activity in precancerous liver and hepatoma is a reflection of the amount of TAT mRNA. Dexamethasone increased the TAT enzyme activity and TAT mRNA concentration in rat livers during chemical carcinogenesis.
给喂食3'-甲基-4-二甲基氨基偶氮苯(3'-MDAB)的大鼠肝脏中,酪氨酸转氨酶(TAT)的活性呈双相下降。在肝癌发生的后期,TAT活性降至极低水平。TAT活性与甲胎蛋白(AFP)水平呈负相关。癌前肝脏和肝癌中TAT酶活性水平反映了TAT mRNA的量。在化学致癌过程中,地塞米松增加了大鼠肝脏中的TAT酶活性和TAT mRNA浓度。