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KMID : 0377619620020030280
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Korean Jungang Medical Journal
1962 Volume.2 No. 3 p.280 ~ p.304
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Tissue Mast Cells in the Digestive Tract of Albino-rats under various Feeding Conditions including Starvation.
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Abstract
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The tissue mast cells in the esophagus, stomach, duodenum, and in the small and large intestines of the albino-rats, under various feeding conditions including starvation were observed. The following conclusions were made.
1) In normal albino-rats, tissue mast cells appeared from the esophagus to the large intestine, in all layers of gastrointestinal tract. The distribution of tissue mast cells in the esophagus and stomach was denser than in lower intestinal tract.
2) In albino-rats after starvation for 60hours, the digestive tract revealed slightly increased number of tissue mast cells as compared to normal albino-rats, but in albino-rats after starvation for 100 hours, and died of starvation for long time the number of tissue mast cells showed a tendency of gradual decrease in proportion to duration of starvation.
3) In albino-rats after starvation for 50 hours, the tissue mast cells in digestive tract underwent a change in numbers. Namely, the number of tissue mast cells began to decrease from about 3 hours after the supply of feed, and showed the least number of mast cells in 18 hours, but the numbers of tissue mast cells of albino-rats after 30 hours were restored to normality.
4) In albino-rats supplied with cold water of 10?C after starvation for 50 hours, the numbers of tissue mast cells in the digestive tract decreased more markedly than in normal albino-rats, and when supplied with hot water of 42°-45°C, the numbers of tissue mast cells decreased more remarkably than in cold water group.
5) When the numbers of tissue mast cells of all layers in the gastrointestinal tract were decreasing in albino-rats under starvation, supply of feed, or supply of water, percentage of normal type of tissue mast cells was decreased, while percentage of abnormal type (so-called diffuse and atrophic type) was increased. On the other hand, when the numbers of tissue mast cells restored and increased, the percentage of the former increased and the latter decreased.
6) In albino-rats under starvation, supply of feed, and, of water, the distribution of the tissue mast cells of each layer in the digestive tract showed generally constant changes according to increase or decrease of the numbers of tissue mast cells. Specially, in the case of decrease and increase of the numbers of tissue mast cells, the variation in the sub mucosa, muscle and serosa was not remarkable but the changes in distribution of tissue mast cells in the mucosal layer was more remarkable. Namely, increase and decrease & the numbers of tissue mast cells in the mucosal layer were more sensitively. observed.
7) Summarizing the experimental results stated above, in albino-rats under starvation, the supply of feed and of water, it was assumed that the occurance, morphological change and histological distribution of tissue mast cells in the digestive tract were related to passage, existence or substitution of supplied feed in the gastrointestinal tract, and therefore in close relationship with digestion and absorption in the digestive tract.
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