产品名称

左旋多巴(Levodopa)

一般描述

Levodopa(左旋多巴) is the naturally occurring form of dihydroxyphenylalanine and the immediate precursor of dopamine. Levodopa is an Aromatic Amino Acid Decarboxylation Inhibitor.

别 称

3-(3,4-Dihydroxyphenyl)-L-alanine; L-3-Hydroxytyrosine, L-DOPA, Levodopa

纯 度

≥98%(HPLC)

CAS NO.

59-92-7

分子式

C⁹H¹¹NO⁴

分子量

197.19

适用范围

生物试剂，适用于细胞培养等

l  理化信息

外 观

白色或类白色固体

溶解性(25℃)

DMSO

Insoluble

乙醇

Insoluble

水

Insoluble

l  生物学信息

生物活性/药理作用

Levodopa (L-dopa) is used to replace dopamine lost in Parkinson's disease because dopamine itself cannot cross the blood-brain barrier where its precursor can. However, L-DOPA is converted to dopamine in the periphery as well as in the CNS, so it is administered with a peripheral DDC (dopamine decarboxylase) inhibitor such as carbidopa, without  which 90% is metabolised in the gut wall, and with a COMT inhibitor if possible; this prevents about a 5% loss. The form given therapeutically is therefore a prodrug which avoids decarboxylation in the stomach and periphery, can cross the blood-brain barrier, and once in the brain is converted to the neurotransmitter dopamine by the enzyme aromatic-L-amino-acid decarboxylase.

Levodopa is an amino acid precursor of dopamine with antiparkinsonian properties. Levodopa is a prodrug that is converted to dopamine by DOPA decarboxylase and can cross the blood-brain barrier. When in the brain, levodopa is decarboxylated to dopamine and stimulates the dopaminergic receptors, thereby compensating for the depleted supply of endogenous dopamine seen in Parkinson's disease. To assure that adequate concentrations of levodopa reach the central nervous system, it is administered with carbidopa, a decarboxylase inhibitor that does not cross the blood-brain barrier, thereby diminishing the decarboxylation and inactivation of levodopa in peripheral tissues and increasing the delivery of dopamine to the CNS.

l  包装与存储

包 装

1g

存储温度

0-5℃

l  注意事项及免责声明

本产品仅用于实验研究，不得作为药物使用，不得用于家用或其它用途。

l  参考文献

1.    http://www.drugbank.ca

2.    https://ncit.nci.nih.gov

3.  https://www.ncbi.nlm.nih.gov