Biomaterial Database

Regulation of PC4/TIS7 expression in adapting remnant intestine after resection. 1998

D C Rubin, and E A Swietlicki, and J L Wang, and M S Levin

Department of Medicine, Washington University School of Medicine, St. Louis, Missouri 63110, USA.

The adaptive response of the small intestine to loss of functional surface area includes enhanced crypt cell proliferation and enterocyte differentiation. To better define the underlying molecular and cellular mechanisms, we have cloned rat genes that are specifically regulated in the adaptive gut after 70% small intestinal resection. One of these is the immediate early gene PC4/TIS7. Compared with sham-resected control ileum, PC4/TIS7 mRNA levels in the adaptive remnant ileum were markedly increased at 16 and 48 h but not 1 wk after resection. Greater augmentation of PC4/TIS7 mRNA levels occurred in the ileum compared with the duodenum and proximal jejunum. After resection, the changes in intestinal PC4/TIS7 mRNA levels also exceeded changes in extraintestinal levels. The demonstration by in situ hybridization that villus-associated, but not crypt, cells express PC4/TIS7 mRNA is consistent with a role in regulating cytodifferentiation. The pattern of expression in the Caco-2 cell line is also consistent with such a role. Although the precise function of PC4/TIS7 in adaptation remains unclear, the early and intestine-specific changes in mRNA levels after 70% resection suggest that it might augment the adaptive response by stimulating the production of differentiated enterocytes.

UI	MeSH Term	Description	Entries
D007082	Ileum	The distal and narrowest portion of the SMALL INTESTINE, between the JEJUNUM and the ILEOCECAL VALVE of the LARGE INTESTINE.
D007421	Intestine, Small	The portion of the GASTROINTESTINAL TRACT between the PYLORUS of the STOMACH and the ILEOCECAL VALVE of the LARGE INTESTINE. It is divisible into three portions: the DUODENUM, the JEJUNUM, and the ILEUM.	Small Intestine,Intestines, Small,Small Intestines
D007583	Jejunum	The middle portion of the SMALL INTESTINE, between DUODENUM and ILEUM. It represents about 2/5 of the remaining portion of the small intestine below duodenum.	Jejunums
D007700	Kinetics	The rate dynamics in chemical or physical systems.
D008297	Male		Males
D008565	Membrane Proteins	Proteins which are found in membranes including cellular and intracellular membranes. They consist of two types, peripheral and integral proteins. They include most membrane-associated enzymes, antigenic proteins, transport proteins, and drug, hormone, and lectin receptors.	Cell Membrane Protein,Cell Membrane Proteins,Cell Surface Protein,Cell Surface Proteins,Integral Membrane Proteins,Membrane-Associated Protein,Surface Protein,Surface Proteins,Integral Membrane Protein,Membrane Protein,Membrane-Associated Proteins,Membrane Associated Protein,Membrane Associated Proteins,Membrane Protein, Cell,Membrane Protein, Integral,Membrane Proteins, Integral,Protein, Cell Membrane,Protein, Cell Surface,Protein, Integral Membrane,Protein, Membrane,Protein, Membrane-Associated,Protein, Surface,Proteins, Cell Membrane,Proteins, Cell Surface,Proteins, Integral Membrane,Proteins, Membrane,Proteins, Membrane-Associated,Proteins, Surface,Surface Protein, Cell
D011994	Recombinant Proteins	Proteins prepared by recombinant DNA technology.	Biosynthetic Protein,Biosynthetic Proteins,DNA Recombinant Proteins,Recombinant Protein,Proteins, Biosynthetic,Proteins, Recombinant DNA,DNA Proteins, Recombinant,Protein, Biosynthetic,Protein, Recombinant,Proteins, DNA Recombinant,Proteins, Recombinant,Recombinant DNA Proteins,Recombinant Proteins, DNA
D002460	Cell Line	Established cell cultures that have the potential to propagate indefinitely.	Cell Lines,Line, Cell,Lines, Cell
D003001	Cloning, Molecular	The insertion of recombinant DNA molecules from prokaryotic and/or eukaryotic sources into a replicating vehicle, such as a plasmid or virus vector, and the introduction of the resultant hybrid molecules into recipient cells without altering the viability of those cells.	Molecular Cloning
D004815	Epidermal Growth Factor	A 6-kDa polypeptide growth factor initially discovered in mouse submaxillary glands. Human epidermal growth factor was originally isolated from urine based on its ability to inhibit gastric secretion and called urogastrone. Epidermal growth factor exerts a wide variety of biological effects including the promotion of proliferation and differentiation of mesenchymal and EPITHELIAL CELLS. It is synthesized as a transmembrane protein which can be cleaved to release a soluble active form.	EGF,Epidermal Growth Factor-Urogastrone,Urogastrone,Human Urinary Gastric Inhibitor,beta-Urogastrone,Growth Factor, Epidermal,Growth Factor-Urogastrone, Epidermal,beta Urogastrone