Abstract
Mitochondrial aldehyde dehydrogenase (ALDH2) is mainly responsible for the oxidation of acetaldehyde generated during alcohol oxidation in vivo. Cytochrome P-4502E1 (CYP2E1), a liver microsomal enzyme, also metabolizes acetaldehyde and ethanol. Genetic polymorphism of ALDH2 and CYP2E1 was investigated among 481 Korean adults. A new restriction fragment-length polymorphism method was developed to determine the genotype of the ALDH2 alleles. This method proved to be simpler and faster than the hybridization method using allele-specific oligonucleotide probes and polymerase chain reaction-directed mutagenesis. The allele frequencies of ALDH2(1) and ALDH2(2) were 0.840 and 0.160, respectively. This allele frequency of ALDH2(2) is less than in Japanese people. Genetic polymorphism of CYP2E1 was investigated using polymerase chain reaction and restriction fragment-length polymorphism. The estimated allele frequencies for c1 and c2 were 0.808 and 0.192.
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