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Altered enteroendocrine cell expression in T cell receptor alpha chain knock‐out mice
Author(s) -
Rubin Deborah C.,
Zhang Huiying,
Qian Peiqing,
Lorenz Robinna G.,
Hutton Karen,
Peters Marion G.
Publication year - 2000
Publication title -
microscopy research and technique
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.536
H-Index - 118
eISSN - 1097-0029
pISSN - 1059-910X
DOI - 10.1002/1097-0029(20001015)51:2<112::aid-jemt2>3.0.co;2-d
Subject(s) - enteroendocrine cell , biology , endocrinology , medicine , cholecystokinin , inflammation , intestinal epithelium , cholecystokinin b receptor , cd8 , t cell receptor , epithelium , t cell , receptor , immune system , immunology , endocrine system , hormone , genetics
Mice lacking T cell receptor alpha chain (TCRα −/− ) develop inflammation of the colon. We have examined the effect of this inflammation on the colonic epithelium by studying markers of epithelial cuff, enteroendocrine, and immune cell differentiation. Using immunohistochemical techniques, colons were compared in normal C57/BL6 and murine TCR α −/− mice aged 2 and 3 weeks and 3–11 months. TCR α −/− mice aged 3–11 months had histologic evidence of inflammation with increased expression of CD45, CD4+, CD8+, and B220+ cells and a decrease in expression of IgA+ cells. There was a decrease in the number of cholecystokinin, serotonin, and neurotensin enteroendocrine expressing cells in the colon of TCR α −/− mice. These changes were not present in 2–3‐week‐old suckling/weaning mice. In contrast, peptide tyrosine tyrosine (PYY), glucagon‐like peptide‐1, and gastrin expression did not change and small intestinal enteroendocrine cells remained unaltered. The change in colonic enteroendocrine cell expression appears to be a specific response, since only a subset of these cells was altered, and the epithelium was intact by histologic analysis. The absence of functional T cells in TCR α −/− colon has a marked effect on differentiation of a specific subpopulation of enteroendocrine cells, prior to loss of integrity of the epithelium. Microsc. Res. Tech. 51:112–120, 2000. © 2000 Wiley‐Liss, Inc.