Volume 52 (4): 509-516, 2004 Copyright ©The Histochemical Society, Inc. Expression of Notch Receptors and Ligands in the Adult Gut
Child Health Research Institute, Womens and Childrens Hospital, Adelaide, South Australia (GRS,BCP), and Department of Paediatrics, University of Adelaide, Adelaide, South Australia (BCP) Correspondence to: G.R. Sander, Child Health Research Institute, 72 King William Road, North Adelaide, South Australia 5006, Australia. E-mail: guy.sander{at}adelaide.edu.au The Notch signaling pathway has become recognized as a vitally important pathway in regulating proliferative/differentiative decisions and cell fate. To explore the involvement of the Notch pathway in adult gut, we investigated the expression of Notch receptors and their ligands by Northern blotting and in situ hybridization. Notch receptors and ligands were expressed in both proliferative and post-mitotic cells throughout adult rat gut, variously in epithelial, immune, and endothelial cells. Expression of Notch1, Jagged1, and Jagged2 frequently overlapped, whereas Notch2 expression was restricted to specific crypt cells, the lamina propria of the large intestine, and Peyer's patch lymphocytes. We propose that the expression of multiple Notch receptors and ligands in a range of different intestinal cell types indicates that this signaling pathway underpins many of the processes involved in the maintenance and function of the adult gut. (J Histochem Cytochem 52:509516, 2004)
Key Words: Notch Jagged Delta1 receptor ligand mucosal immune system
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