Biomaterial Database

Distribution of enteroglucagon- and peptide YY-immunoreactive cells in the intestinal mucosa of germ-free and conventional mice. 1997

R M Arantes, and A M Nogueira

Department of General Pathology, Institute of Biological Sciences, Federal University of Minas Gerais, Minas Gerais, Brazil.

There are evidences that microflora modulates endocrine cells in the gastrointestinal tract. In the present study we investigated the distribution of EG- and PYY-immunoreactive cells throughout the intestine of adult male NMRI conventional and germ-free mice. EG-immunoreactive cells were significantly more frequent in the proximal and middle colon than in the remainder of the intestine in both groups. In germ-free animals, these cells were more frequent in the cecum and less frequent in the distal ileum compared to conventional mice. PYY-immunoreactive cells were more frequent in the distal colon than in the remainder of the intestine in both groups, but they were significantly more frequent in the middle and distal colon of germ-free animals than in that of conventional counterparts. The number of EG-immunoreactive cells was 4.5-fold higher than the number of PYY-immunoreactive cells in the cecum of germ-free mice. The present results indicate the existence of an inverse gradient of EG- and PYY-immunoreactive cells along the colon, which is not significantly changed in the absence of a microflora. PYY production seems to be more significant in the distal colon. The cecum and the proximal portion of the colon are probably the regions of greatest functional importance for EG production, which is related to the microflora and probably to fermentation products, whether or not the effect of this peptide is trophic or antitrophic.

UI	MeSH Term	Description	Entries
D007413	Intestinal Mucosa	Lining of the INTESTINES, consisting of an inner EPITHELIUM, a middle LAMINA PROPRIA, and an outer MUSCULARIS MUCOSAE. In the SMALL INTESTINE, the mucosa is characterized by a series of folds and abundance of absorptive cells (ENTEROCYTES) with MICROVILLI.	Intestinal Epithelium,Intestinal Glands,Epithelium, Intestinal,Gland, Intestinal,Glands, Intestinal,Intestinal Gland,Mucosa, Intestinal
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
D008297	Male		Males
D008815	Mice, Inbred Strains	Genetically identical individuals developed from brother and sister matings which have been carried out for twenty or more generations, or by parent x offspring matings carried out with certain restrictions. All animals within an inbred strain trace back to a common ancestor in the twentieth generation.	Inbred Mouse Strains,Inbred Strain of Mice,Inbred Strain of Mouse,Inbred Strains of Mice,Mouse, Inbred Strain,Inbred Mouse Strain,Mouse Inbred Strain,Mouse Inbred Strains,Mouse Strain, Inbred,Mouse Strains, Inbred,Strain, Inbred Mouse,Strains, Inbred Mouse
D008854	Microscopy, Electron	Microscopy using an electron beam, instead of light, to visualize the sample, thereby allowing much greater magnification. The interactions of ELECTRONS with specimens are used to provide information about the fine structure of that specimen. In TRANSMISSION ELECTRON MICROSCOPY the reactions of the electrons that are transmitted through the specimen are imaged. In SCANNING ELECTRON MICROSCOPY an electron beam falls at a non-normal angle on the specimen and the image is derived from the reactions occurring above the plane of the specimen.	Electron Microscopy
D002432	Cecum	The blind sac or outpouching area of the LARGE INTESTINE that is below the entrance of the SMALL INTESTINE. It has a worm-like extension, the vermiform APPENDIX.	Cecums
D003106	Colon	The segment of LARGE INTESTINE between the CECUM and the RECTUM. It includes the ASCENDING COLON; the TRANSVERSE COLON; the DESCENDING COLON; and the SIGMOID COLON.	Appendix Epiploica,Taenia Coli,Omental Appendices,Omental Appendix,Appendices, Omental,Appendix, Omental
D004763	Glucagon-Like Peptides	Peptides derived from proglucagon which is also the precursor of pancreatic GLUCAGON. Despite expression of proglucagon in multiple tissues, the major production site of glucagon-like peptides (GLPs) is the INTESTINAL L CELLS. GLPs include glucagon-like peptide 1, glucagon-like peptide 2, and the various truncated forms.	Enteroglucagon,Enteroglucagons,Glucagon-Like Peptide,Glucagon-Like Polypeptide,Gut Glucagon,Glucagon-Like Polypeptides,Glucagon Like Peptide,Glucagon Like Peptides,Glucagon Like Polypeptide,Glucagon Like Polypeptides,Glucagon, Gut,Peptide, Glucagon-Like,Polypeptide, Glucagon-Like
D005856	Germ-Free Life	Animals not contaminated by or associated with any foreign organisms.	Axenic Animals,Gnotobiotics,Germfree Life,Animal, Axenic,Animals, Axenic,Axenic Animal,Germ Free Life,Gnotobiotic,Life, Germ-Free,Life, Germfree
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia