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Previous studies have reported some significant participation by gastric alcohol dehydrogenase (ADH) in alcohol metabolism, similar to that by hepatic ADH. However, the localization of this ADH in the stomach is not yet determined and there has been no study on the localization of ADH in the stomach of alcoholics before and after abstinence from alcohol. The aim of the present study was to reveal any changes between before and after abstinence from alcohol in the immunohistochemical localization of ADH using biopsy specimens from the gastric mucosa. Twenty male alcoholics (aged 47.8 +/- 7.4 yrs) gave signed informed consent for this investigation. Esophago-gastro-duodenoscopy (EGD) and gastric corpus biopsy were performed just before abstinence and at one month later. ADH in the biopsy specimens was immunohistochemically examined with an anti-ADH antibody, using confocal laser scanning microscopy. The fluorescence intensity for ADH was compared for each pair of specimens before and after abstinence from alcohol using an image analyzer. Age, total alcohol consumption, degree of gastritis, and the liver function tests of all patients were also analyzed. The strongly immuno-positive cells for ADH in the gastric mucosa were identified as parietal cells. The fluorescence intensity for ADH was significantly higher in those specimens obtained after abstinence than in those before abstinence (p &lt; 0.005). The immunoreactibility for ADH in the cells assessed by confocal laser scanning microscopy was greatly improved after abstinence of alcohol, suggesting recovered alcohol metabolism in the gastric mucosa after abstinence from alcohol. The present study, demonstrating the cellular ADH localization in the gastric mucosa before and after abstinence from alcohol, may contribute to clarifying gastric alcohol metabolism in alcoholics.

kurume medical journal/kurume medical journal

Immunohistochemical Localization of Alcohol Dehydrogenase (ADH) in the Stomach Before and After Abstinence of Alcohol in Alcoholics. Using Confocal Laser Scanning Microscopy.