[Characteristics of the pentose phosphate pathway of carbohydrate metabolism in the gastric mucosa of persons with peptic ulcer].

Activity of the main enzymes of pentose phosphate pathway of carbohydrate metabolism was studied in human mucosa of the stomach. In the mucosa glucose-6-phosphate dehydrogenase in gastric ulcer and 6-phosphogluconate dehydrogenase in normal stomach were shown to be less active as compared with these enzymatic activities in duodenal ulcer. A distinct decrease in the activity of glucose-6-phosphate dehydrogenase was observed in the ulcerous region, independently of the ulcer localization either in corpus ventriculi or in duodenum, as compared with the parts of the mucosa away from the impairment; the lowest enzymatic activity was estimated in the gastric ulcer zone. Activities of 6-phosphogluconate dehydrogenase and transketolase were the same in the ulcerous and normal mucosa and did not depend on the localization of the impairment. Contents of lactic and pyruvic acids were similar in mucosa of the stomach both in gastric and duodenal ulcer.