儿茶酚胺是由酪氨酸合成而来，合成过程中有四种酶参与，酪氨酸羟化酶（Tyrosine hydroxylase TH）是第一个酶，催化酪氨酸生成多巴，也是限速酶，在调节中枢神经和交感神经系统及心血管功能上发挥着重要的作用。
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TH tyrosine hydroxylase 酪氨酸羟化酶
AIM: To observe the relationship between the drug dependence behavior and levels of tyrosine hydroxylase (th) in drug acquisition process.
目的：探讨药物依赖行为和酪氨酸羟化酶在成瘾过程中的相互关系。
Objective:To observe the expression of Tyrosine Hydroxylase(TH) of Hypothalamus in post-stroke depression rat model and effects of Yishen Tiaoqi decoction.
目的：观察脑缺血后抑郁模型大鼠下丘脑酪胺酸羟化酶（TH）表达及益肾调气方药的干预作用。
Methods: Immunohistochemistry technology and high-pressure liquid chromatography with electrochemical detector (HPLC-EC) were used to evaluated tyrosine hydroxylase (TH) and DA .
方法：采用免疫组化技术和高效液相- 电化学法（ HPLC - EC）分别对酪氨酸羟化酶（TH）、DA进行了含量测定。
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