PMID- 12813912 OWN - NLM STAT- MEDLINE DCOM- 20030731 LR - 20181113 IS - 0065-7778 (Print) IS - 0065-7778 (Linking) VI - 114 DP - 2003 TI - E. coli heat-stable enterotoxin and guanylyl cyclase C: new functions and unsuspected actions. PG - 67-85; discussion 85-6 AB - Some E. coli cause diarrhea by elaborating heat-labile and heat-stable (ST) enterotoxins which stimulate intestinal secretion. E. coli ST's are small peptides which bind to intestinal luminal epithelial cell receptors. The ST receptor, one of a family of receptor-cyclases called guanylyl cyclase C (GC-C), is a membrane spanning protein containing an extracellular binding domain and intracellular protein kinase and catalytic domains. The intestine synthesizes and secretes homologous peptides, guanylin and uroguanylin. The kidney also synthesizes uroguanylin. ST, guanylin or uroguanylin binding to GC-C results in increased cGMP, phosphorylation of the CFTR Cl- channel and secretion. Proguanylin and prouroguanylin circulate in blood and bind to receptors in intestine, kidney, liver, brain etc. In the kidney, they stimulate the excretion of Na+ and K+. Study of GC-C "knock-out" mice reveal that GC-C is important to intestinal salt and water secretion, duodenal bicarbonate secretion, recovery from CCl4-induced liver injury, and to intestinal polyp formation in Min mice lacking GC-C. FAU - Giannella, Ralph A AU - Giannella RA AD - Division of Digestive Diseases, University of Cincinnati College of Medicine, 231 Albert Sabin Way, Cincinnati, OH 45267-0595, USA. ralph.giannella@uc.edu FAU - Mann, Elizabeth A AU - Mann EA LA - eng PT - Journal Article PT - Review PL - United States TA - Trans Am Clin Climatol Assoc JT - Transactions of the American Clinical and Climatological Association JID - 7507559 RN - 0 (Bacterial Toxins) RN - 0 (Enterotoxins) RN - 0 (Escherichia coli Proteins) RN - 0 (Gastrointestinal Hormones) RN - 0 (Natriuretic Peptides) RN - 0 (Peptides) RN - 0 (Receptors, Peptide) RN - 0 (heat stable toxin (E coli)) RN - 140653-38-9 (guanylin) RN - 152175-68-3 (uroguanylin) RN - EC 4.6.1.2 (Guanylate Cyclase) RN - EC 4.6.1.2 (Receptors, Enterotoxin) RN - EC 4.6.1.2 (Receptors, Guanylate Cyclase-Coupled) SB - IM MH - Amino Acid Sequence MH - Animals MH - Bacterial Toxins/genetics/*toxicity MH - Diarrhea/etiology/physiopathology MH - Enterotoxins/genetics/*toxicity MH - Escherichia coli/genetics/pathogenicity MH - Escherichia coli Infections/etiology/physiopathology MH - Escherichia coli Proteins MH - Gastrointestinal Hormones/physiology MH - Guanylate Cyclase/deficiency/drug effects/genetics/*physiology MH - Humans MH - Intestinal Polyps/etiology MH - Mice MH - Mice, Knockout MH - Models, Biological MH - Molecular Sequence Data MH - Natriuretic Peptides MH - Peptides/physiology MH - Receptors, Enterotoxin MH - Receptors, Guanylate Cyclase-Coupled MH - Receptors, Peptide/deficiency/drug effects/genetics/*physiology PMC - PMC2194511 EDAT- 2003/06/20 05:00 MHDA- 2003/08/02 05:00 PMCR- 2003/01/01 CRDT- 2003/06/20 05:00 PHST- 2003/06/20 05:00 [pubmed] PHST- 2003/08/02 05:00 [medline] PHST- 2003/06/20 05:00 [entrez] PHST- 2003/01/01 00:00 [pmc-release] PST - ppublish SO - Trans Am Clin Climatol Assoc. 2003;114:67-85; discussion 85-6.