Differences in hormone localisation patterns of K and ...
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Differences in hormone localisation patterns of K and ...
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Cell Tissue Res (2015) 359:693–698 DOI 10.1007/s00441-014-2033-3
SHORT COMMUNICATION
Differences in hormone localisation patterns of K and L type enteroendocrine cells in the mouse and pig small intestine and colon Hyun-Jung Cho & Samin Kosari & Billie Hunne & Brid Callaghan & Leni R. Rivera & David M. Bravo & John B. Furness
Received: 18 August 2014 / Accepted: 14 October 2014 / Published online: 7 November 2014 # Springer-Verlag Berlin Heidelberg 2014
Abstract This study has investigated the patterns of colocalisation of the conventional K cell marker, glucagonlike insulinotropic peptide (GIP), and the L cell markers, glucagon like peptide-1 (GLP-1) and peptide YY (PYY), in enteroendocrine cells (EEC) of the small intestine and colon of mouse and pig. All combinations of the hormones, 3 in a cell, 2 in a cell and 1 at a time, were encountered. In both species, the three most common EEC types contained (1) both GLP-1 and PYY but not GIP, (2) GLP-1 alone or (3) GIP plus GLP-1 without PYY. Few GIP plus PYY cells and rare cells containing all 3 hormones were encountered. Gradients of cell types occurred along the intestine. For example, in mouse, there were no PYY cells in the duodenum and few in the jejunum, but >50 % of labelled EEC in the distal ileum and colon were PYY immunoreactive. By contrast, over 40 % of EEC in the pig duodenum contained PYY, and most also contained either GLP-1 or GIP. The gradient in pig was less pronounced. It is concluded that the traditional classification of K and L cells requires revision, and that there are major inter-species differences in the patterns of colocalisation of hormones that have been used to characterise K and L cells.
Keywords L cells . K cells . Gastrointestinal hormones . Glucagon-like insulinotropic peptide . Glucagon like peptide . Peptide YY Hyun-Jung Cho and Samin Kosari are equal first authors H.
