Abstract
We recently described the chemical synthesis of 3,4-dihydroxyphenylacetaldehyde and 3,4-dihydroxyphenylglycolaldehyde, the monamine oxidase metabolites of dopamine and noradrenaline, respectively. We demonstrated the neurotoxicity of these compounds. Catecholamine nerve cells which synthesize these aldehydes die in degenerative brain diseases, such as Parkinson's and Alzheimer's. Here we describe a sensitive method for separating these catecholaldehydes from catecholamines and their other oxidative and methylated metabolites by microcolumn high-performance liquid chromatography with electrochemical detection. We then quantitate catecholamines and their major metabolites in human brain, plasma, and urine. The method can be used to determine the role of these catecholaldehydes in human disease.
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