Novel sites for expression of an Escherichia coli heat-stable enterotoxin receptor in the developing rat. 1992

D W Laney, and E A Mann, and S C Dellon, and D R Perkins, and R A Giannella, and M B Cohen
Division of Pediatric Gastroenterology and Nutrition, Children's Hospital Medical Center, University of Cincinnati College of Medicine, Ohio.

Escherichia coli heat-stable enterotoxin (STa) mediates diarrheal disease by binding to and activating an intestinal transmembrane receptor, guanylate cyclase C (GC-C). To test the hypotheses that there was 1) increased perinatal expression of GC-C in rat intestine and 2) GC-C expression and STa binding in extraintestinal tissues of immature rat, we prepared whole cell membranes and total RNA from jejunum, ileum, colon, liver, kidney, heart, lung, brain, testis, and placenta of rats ranging in age from 12 days gestation to adult. Northern analysis demonstrated the presence of a unique 3.8-kb mRNA transcript at all ages in the jejunum, ileum, colon, and, to a lesser degree, in the testis. GC-C was also detected by Northern analysis in liver (from gestational age 18 days through 14 days postnatal) and in placenta. Steady-state mRNA encoding GC-C was not detected by Northern analysis in the other organs examined. GC-C-specific mRNA expression was greatest in the perinatal period in the jejunum, ileum, and liver. Specific binding of 125I-labeled STa was found in each of the tissue membranes in which GC-C mRNA was present; binding was not present in those tissues that had no detectable GC-C mRNA. The existence of GC-C in extraintestinal organs in the rat, and the development changes in GC-C expression support our hypothesis that GC-C, apart from its role as an STa receptor in mediating diarrheal disease, also serves as a receptor for an endogenous ligand.

UI MeSH Term Description Entries
D008969 Molecular Sequence Data Descriptions of specific amino acid, carbohydrate, or nucleotide sequences which have appeared in the published literature and/or are deposited in and maintained by databanks such as GENBANK, European Molecular Biology Laboratory (EMBL), National Biomedical Research Foundation (NBRF), or other sequence repositories. Sequence Data, Molecular,Molecular Sequencing Data,Data, Molecular Sequence,Data, Molecular Sequencing,Sequencing Data, Molecular
D011956 Receptors, Cell Surface Cell surface proteins that bind signalling molecules external to the cell with high affinity and convert this extracellular event into one or more intracellular signals that alter the behavior of the target cell (From Alberts, Molecular Biology of the Cell, 2nd ed, pp693-5). Cell surface receptors, unlike enzymes, do not chemically alter their ligands. Cell Surface Receptor,Cell Surface Receptors,Hormone Receptors, Cell Surface,Receptors, Endogenous Substances,Cell Surface Hormone Receptors,Endogenous Substances Receptors,Receptor, Cell Surface,Surface Receptor, Cell
D004355 Drug Stability The chemical and physical integrity of a pharmaceutical product. Drug Shelf Life,Drugs Shelf Lives,Shelf Life, Drugs,Drug Stabilities,Drugs Shelf Life,Drugs Shelf Live,Life, Drugs Shelf,Shelf Life, Drug,Shelf Live, Drugs,Shelf Lives, Drugs
D004622 Embryo, Mammalian The entity of a developing mammal (MAMMALS), generally from the cleavage of a ZYGOTE to the end of embryonic differentiation of basic structures. For the human embryo, this represents the first two months of intrauterine development preceding the stages of the FETUS. Embryonic Structures, Mammalian,Mammalian Embryo,Mammalian Embryo Structures,Mammalian Embryonic Structures,Embryo Structure, Mammalian,Embryo Structures, Mammalian,Embryonic Structure, Mammalian,Embryos, Mammalian,Mammalian Embryo Structure,Mammalian Embryonic Structure,Mammalian Embryos,Structure, Mammalian Embryo,Structure, Mammalian Embryonic,Structures, Mammalian Embryo,Structures, Mammalian Embryonic
D004768 Enterotoxins Substances that are toxic to the intestinal tract causing vomiting, diarrhea, etc.; most common enterotoxins are produced by bacteria. Staphylococcal Enterotoxin,Enterotoxin,Staphylococcal Enterotoxins,Enterotoxin, Staphylococcal,Enterotoxins, Staphylococcal
D004926 Escherichia coli A species of gram-negative, facultatively anaerobic, rod-shaped bacteria (GRAM-NEGATIVE FACULTATIVELY ANAEROBIC RODS) commonly found in the lower part of the intestine of warm-blooded animals. It is usually nonpathogenic, but some strains are known to produce DIARRHEA and pyogenic infections. Pathogenic strains (virotypes) are classified by their specific pathogenic mechanisms such as toxins (ENTEROTOXIGENIC ESCHERICHIA COLI), etc. Alkalescens-Dispar Group,Bacillus coli,Bacterium coli,Bacterium coli commune,Diffusely Adherent Escherichia coli,E coli,EAggEC,Enteroaggregative Escherichia coli,Enterococcus coli,Diffusely Adherent E. coli,Enteroaggregative E. coli,Enteroinvasive E. coli,Enteroinvasive Escherichia coli
D006162 Guanylate Cyclase An enzyme that catalyzes the conversion of GTP to 3',5'-cyclic GMP and pyrophosphate. It also acts on ITP and dGTP. (From Enzyme Nomenclature, 1992) EC 4.6.1.2. Guanyl Cyclase,Deoxyguanylate Cyclase,Guanylyl Cyclase,Inosinate Cyclase,Cyclase, Deoxyguanylate,Cyclase, Guanyl,Cyclase, Guanylate,Cyclase, Guanylyl,Cyclase, Inosinate
D006358 Hot Temperature Presence of warmth or heat or a temperature notably higher than an accustomed norm. Heat,Hot Temperatures,Temperature, Hot,Temperatures, Hot
D000074261 Receptors, Enterotoxin Guanylate cyclase-coupled receptors that bind bacterial ENTEROTOXINS, as well as the endogenous peptides guanylin and uroguanylin. Ligand binding stimulates production of CYCLIC GMP by EPITHELIAL CELLS of the intestinal lumen, altering barrier permeability and mucus secretion. Mutations in the gene (GUCY2C) encoding this receptor are associated with some cases of hereditary diarrhea (Diarrhea 6) and MECONIUM ILEUS. Enterotoxin Receptor,Enterotoxin Receptors,Enterotoxin-Guanylin Receptor,Enterotoxin-Guanylin Receptors,GC-C Receptor,GC-C Receptors,Guanyl Cyclase-C Receptor,Guanyl Cyclase-C Receptors,Guanylin-Uroguanylin Receptor,Guanylin-Uroguanylin Receptors,Guanylyl Cyclase C,Heat-Stable Enterotoxin Receptor,Heat-Stable Enterotoxin Receptors,Receptor, Enterotoxin,Receptor, Guanyl Cyclase-C,Receptors, Guanyl Cyclase-C,Cyclase C, Guanylyl,Cyclase-C Receptors, Guanyl,Enterotoxin Guanylin Receptor,Enterotoxin Guanylin Receptors,Enterotoxin Receptor, Heat-Stable,Enterotoxin Receptors, Heat-Stable,GC C Receptor,GC C Receptors,Guanyl Cyclase C Receptor,Guanyl Cyclase C Receptors,Guanylin Uroguanylin Receptor,Guanylin Uroguanylin Receptors,Heat Stable Enterotoxin Receptor,Heat Stable Enterotoxin Receptors,Receptor, Enterotoxin-Guanylin,Receptor, GC-C,Receptor, Guanyl Cyclase C,Receptor, Guanylin-Uroguanylin,Receptor, Heat-Stable Enterotoxin,Receptors, Enterotoxin-Guanylin,Receptors, GC-C,Receptors, Guanyl Cyclase C,Receptors, Guanylin-Uroguanylin,Receptors, Heat-Stable Enterotoxin
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

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