Dynamics of epithelial cells in the corpus of the mouse stomach. I. Identification of proliferative cell types and pinpointing of the stem cell

作者：Sherif M. Karam, Charles Philippe Leblond · 发表于：The Anatomical Record · 年份：1993 · DOI：10.1002/ar.1092360202 · 被引用次数：371 · 研究领域：Cancer Cells and Metastasis、Cancer-related molecular mechanisms research、Caveolin-1 and cellular processes

Abstract In a recent study of the corpus epithelium in the mouse stomach, eleven cell types have been identified and enumerated (Karam and Leblond: Anat. Rec. 232:231–246, 1992). The dynamics of these cells will be examined in a series of five articles, of which this is the first. This article focuses on the proliferative ability of the cells, as measured by the labeling index in radioautographs from mice sacrificed 30 min after an intravenous injection of 3H‐thymidine. Furthermore, the ultrastructure of the cells found to be proliferative was examined in the hope of finding features characteristic of stem cells. On the basis of their labeling index, the epithelial cells have been classified into four groups. The first includes three cell types which do not take up any label and accordingly are non‐dividing: parietal or oxyntic cells, cells named pre‐parietal as they are immature cells suspected of being parietal cell precursors, and the rare caveolated or brush cells. The second group is composed of three cell types which are only rarely labeled and, therefore, divide only occasionally: zymogenic or chief cells, entero‐endocrine cells, and cells named pre‐zymogenic cells as they are suspected of being zymogenic cell precursors. The third group includes two cell types which are always labeled at a low degree and, therefore, divide regularly, but at a low rate: surface mucous cells, herein called pit cells, whose labeling index is 0.8%, and mucous neck cells, simply known as n...