An histochemical study of endocrine cells in the alimentary tract of the red-eared slider, Trachemys scripta elegans

붉은귀거북이 소화관 내분비세포에 관한 조직화학적 연구

The regional distributions and relative frequencies of endocrine cells were studied histochemically (Grimelius and Masson-Hamperl (M-H) silver methods) in the alimentary tract of the red-eared slider, Trachemys scripta elegans. Samples were taken from the esophagus, fundus, pylorus, duodenum, jejunum, ileum and large intestine. Argyrophil (Grimelius-positive) cells and argentaffin (M-H-positive) cells were found in the whole alimentary tract in this study. Spherical to spindle and/or oval to round-shaped argyrophil or argentaffin cells were located in the gastric glands of the stomach regions, in the basal portion of the epithelium of intestinal tract or the esophagus with variable frequencies. Argentaffin cells were more numerously detected in the whole alimentary tract compared with those of argyrophil cells in this study. Argyrophil cells were observed in the whole alimentary tract including the esophagus and the most predominant region was the rectum with moderate frequency. The relative frequency of these cells was rare in the esophagus, fundus, duodenum, jejunum and ileum, respectively and a few frequency in the pylorus. Argentaffin cells were also observed in the whole alimentary tract including the esophagus and the most numerously demonstrated region was the rectum with numerous frequency. They were observed with a few frequencies in the remaining regions of the alimentary tract except for the rectum, respectively. However, to know the exact type of the argyrophil cells and argentaffin cells that were observed in this study, more developmental methods such as immunohistochemistry were needed.

붉은귀거북이(red-eared slider, Trachemys scripta elegans)의 소화관에 존재하는 위장관내분비세포의 부위별 분포 및 출현빈도를 Grimelius 및 Masson-Hamperi(M-H)도은 염색을 이용하여 조직화학적으로 관찰하였다. 소화관은 식도, 기저부(fundus), 유문부, 십이지장, 공장, 회장 및 대장의 7부위로 구분하였다. 소화관 전 부위에 걸쳐 은호성세포(argy-rophil, Grimelius-positive cell) 및 은친화성세포(argentaffin cell, M-H-positive cell) 들이 관찰되었다. 타원형에서 방추형 또는 난원형에서 원형의 은호성세포 및 은친화성세포들이 기저부와 유문부의 위샘(gastric gland), 장 및 식도상피의 기저부에서 관찰되었으며, 소화관 각 부위별로 다양한 출현빈도를 나타내었다. 은호성세포들은 식도를 포함한 소화관 전 부위에서 관찰되었으며, 중등도의 출현빈도를 나타낸 직장에서 가장 높은 빈도를 나타내었고, 식도, 기저부, 십이지장, 공장 및 회장에서 극소수, 유문부에서는 소수 관찰되었다. 은친화성세포들 역시 소화관 전 부위에서 관찰되었으며, 은호성세포와 유사하게 다수의 출현빈도를 나타낸 직장에서 가장 높은 빈도를 나타내었고, 직장 이외의 부위에서는 소수의 세포들이 관찰되었다.