Subcellular Distribution of Human Brain Aldehyde Dehydrogenase |
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Authors: | Kazuyoshi Inoue Kai O Lindros |
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Institution: | Research Laboratories of the State Alcohol Monopoly (Alko), Helsinki, Finland |
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Abstract: | Abstract: Two human brain surgery biopsies and one autopsy sample were subjected to subcellular fractionation. With either 0.12 or 6 mM-acetaldehyde as substrate, about half of the total aldehyde dehydrogenase activity was found in the mitochondrial (+ synaptosomal) fraction and less activity in the cytosolic, nuclear, and microsomal fractions. High-affinity activity was found only in the mitochondrial fraction. The enzyme in all fractions had a higher affinity for indole-3-acetaldehyde than for acetaldehyde. The kinetic data indicate the presence of several distinct aldehyde dehydrogenase isozymes that have ample capacity to oxidize both aliphatic and aromatic aldehydes in human brain. |
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Keywords: | Human brain Aldehyde dehydrogenase Acetaldehyde |
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