Download PDF by W. K. Lelbach (auth.), Priv. Doz. Dr. med. Helmut Karl: Alcohol Related Diseases in Gastroenterology

By W. K. Lelbach (auth.), Priv. Doz. Dr. med. Helmut Karl Seitz, Professor Dr. med. Burkhard Kommerell (eds.)

ISBN-10: 3642700489

ISBN-13: 9783642700484

ISBN-10: 3642700500

ISBN-13: 9783642700507

Alcohol abuse ranks one of the commonest and likewise the main serious environmental risks to human health and wellbeing. Its value is heightened by means of the opportunity of prevention by means of removing of the behavior, besides the fact that, hardly ever exerted. The occurrence of deleterious results on human health and wellbeing has relentlessly risen some time past years for numerous elements. They contain migration of populations and, quite, elevated urbanization. therefore, in a few elements of the realm, inhabitants teams formerly spared became concerned, that's additionally re­ flected within the expanding variety of breweries and distilleries within the constructing nations. Social, spiritual, and gender-related limitations to alcohol intake are loosening, and the monetary development of a few segments of populations now permit them to shop for alcoholic drinks. therefore the best percent upward thrust within the usa has lately been in black ladies. youngsters and teenagers drink extra alcoholic drinks than ever, and becoming alcohol abuse by means of pregnant ladies has enable to a rise of the occurrence of the fetal alcohol syndrome. whereas the social and behavioral, together with psychiatric, outcomes of alcoholism are superb, the gastrointestinal and, fairly, hepatic manifestations are the main common somatic results, and persistent hepatic disorder in alcoholics seems to be to reason the best rate to society. certainly, mortality from liver cirrhosis is taken into account a competent index of alcohol intake in a country.

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In any event, such a mechanism does not involve catalase, the role of which is probably limited to ethanol metabolism by H 20 2 generated inside the peroxisomes. Catalase, however, appears to participate in the oxidation of methanol, at least in the rat , whereas in the monkey alcohol dehydrogenase may play a greater role (Makar et al. 1968). Chronic ethanol feeding resulted in a striking increase of microsomal NADPH-dependent oxidation of methanol (Teschke et al. 1974), but there was also a response with n-propanol and n-butanol, substrates that virtually fail to react peroxidatically with catalase-H 20 2.

Shigeta et al. 1984) 33 Ethanol Metabolism and Pathophysiology of Alcoholic Liver Disease increase after chronic ethanol consumption) by furnishing the H 20 2 needed for the oxidation mediated by the' OH generated by the reductase (Ohnishi and Lieber 1977,1978; Winston and Cederbaum 1983). In the presence of the ethanol-induced form of cytochrome P-450, however, such a mechanism may be less important than the cytochrome-P-450-(non: OH) dependent oxidation of ethanol (Ohnishi and Lieber, 1977, 1978).

Nevertheless, toxicity developed. One possible explanation is that vitamin A toxicity may be mediated at least in part by the enhanced microsomal production of a toxic metabolite, as in the case of xenobiotic agents. Indeed, cytochrome P-450f was found recently by Leo et al. (1984) to display a selective capacity to metabolize retinoic acid to polar metabolites in a reconstituted system; in vivo, both ethanol and high A feeding appeared to increase this form of cytochrome (Leo et al. 1984), which has been newly discovered and purified (Iida et al.

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Alcohol Related Diseases in Gastroenterology by W. K. Lelbach (auth.), Priv. Doz. Dr. med. Helmut Karl Seitz, Professor Dr. med. Burkhard Kommerell (eds.)


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