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A novel therapeutic approach to depression via supplement with tyrosine hydroxylase





Biochem Biophys Res Commun. 2006 Oct 11; [Epub ahead of print]


A novel therapeutic approach to depression via supplement with tyrosine hydroxylase.


Fu AL, Wu SP, Dong ZH, Sun MJ. Institute of Neurobiology, Fudan University, Shanghai 200433, China; Department of Biochemistry and Pharmacology, Institute of Pharmacology and Toxicology, Beijing 100850, China.


Tyrosine hydroxylase (tyrosine 3-monooxygenase, EC, TH) is the rate-limiting enzyme in the biosynthesis of catecholamine neurotransmitters, dopamine (DA), noradrenaline (NE), and adrenaline, in the neurons. The regulated activity of TH is thought to play a critical role in modulating the functional activity of catecholaminergic neuronal systems in the brain. It is well known that the catecholaminergic neuronal systems are associated with depression. Here we showed that TH, delivered by protein transduction domain (PTD), passed through the blood-brain barrier and entered the neurons. Systemic TH treatment improved the behavioral despair in the forced swim test (FST) and the tail suspension test (TST), the two models widely used to screen the potential anti-depressant efficacy. The results indicated a novel and potential therapeutic use of TH in the depression disorder.


PMID: 17054915 [PubMed - as supplied by publisher]


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