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Updated: Jun 12, 2026

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Published on: June 23, 2023
Characteristics of Japanese alcoholics with inactive aldehyde dehydrogenase: clinical features of alcoholics with
K Nakamura1, K Iwahashi, M Itoh
1Department of Neuropsychiatry, Faculty of Medicine, Kagawa Medical University, Miki-cho, Kita-gun, Kagawa, 761-0793, Japan.
Abstract:
Abstract In a person with inactive ALDH2 (ALDH2*2) the blood aldehyde concentration tends to rise faster and higher and there are flushing responses which are considered to be a restraint against excessive alcohol drinking. The subjects in this study comprised 71 Japanese alcoholics. Psychiatrists interviewed the patients concerning the clinical features. Alcoholics homozygous (n = 59) for ALDH2*1/ALDH2*1 (Group I) and those heterozygous (n = 12) for ALDH2*1/ALDH2*2 (Group II) were compared. Group II alcoholics included significantly more cases of guilt or personality disorder. These findings indicate that alcoholics with the ALDH2*2 genotype showed generally typical clinical features.
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