Document Detail


Ghrelin and motilin are cosecreted from a prominent endocrine cell population in the small intestine.
MedLine Citation:
PMID:  17595255     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
CONTEXT: Ghrelin is a novel hormone produced mainly in the gastric body. Hitherto, mapping studies of ghrelin cells covering the entire gastrointestinal (GI) tract in humans have been lacking. Furthermore, the phenotype of extragastric ghrelin cells is not known. OBJECTIVE: The objective of the study was to perform a detailed mapping with specimens from all parts of the GI tract, and colocalization studies to phenotype ghrelin cells along the tract. In addition, mapping of ghrelin cells was performed in porcine GI tract, and the plasma profiles of ghrelin and motilin in blood from the porcine intestine were measured. DESIGN: Biopsies from patients were obtained during gastroscopy or surgery. Ghrelin cell density and phenotyping was assessed with immunocytochemistry, in situ hybridization, and immunogold electron microscopy. Plasma ghrelin and motilin levels were measured in pigs, fitted with cannulas in the mesenteric vein. RESULTS: The upper small intestine is unexpectedly rich in ghrelin cells, and these cells contribute to circulating ghrelin. Ghrelin and motilin are coproduced in the same cells in the duodenum and jejunum of both species, and ghrelin and motilin are stored in all secretory granules of such cells in humans, indicating cosecretion. The plasma profiles of ghrelin and motilin in pig were parallel, and a correlation between ghrelin and motilin (r(2) = 0.22; P < 0.001) was evident in intestinal blood. CONCLUSIONS: The upper small intestine is an important source of ghrelin. The likely cosecretion of intestinal ghrelin and motilin suggests concerted actions of the two hormones. These data may have implications for understanding gut motility and clinical implications for dysmotility and bariatric surgery.
Authors:
Nils Wierup; Maria Björkqvist; Björn Weström; Stefan Pierzynowski; Frank Sundler; Kristina Sjölund
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2007-06-26
Journal Detail:
Title:  The Journal of clinical endocrinology and metabolism     Volume:  92     ISSN:  0021-972X     ISO Abbreviation:  J. Clin. Endocrinol. Metab.     Publication Date:  2007 Sep 
Date Detail:
Created Date:  2007-09-07     Completed Date:  2007-11-01     Revised Date:  2007-11-15    
Medline Journal Info:
Nlm Unique ID:  0375362     Medline TA:  J Clin Endocrinol Metab     Country:  United States    
Other Details:
Languages:  eng     Pagination:  3573-81     Citation Subset:  AIM; IM    
Affiliation:
Lund University, Department of Experimental Medical Science, Division of Diabetes, Metabolism, and Endocrinology, Unit of Neuroendocrine Cell Biology, BMC B11, SE-22 184 Lund, Sweden. nils.wierup@med.lu.se
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MeSH Terms
Descriptor/Qualifier:
Adolescent
Adult
Aged
Aged, 80 and over
Animals
Enteroendocrine Cells / metabolism,  secretion*
Female
Gastrointestinal Motility / physiology
Ghrelin
Humans
Intestine, Small / cytology,  metabolism,  secretion*
Male
Middle Aged
Motilin / secretion*
Peptide Hormones / secretion*
Stomach / metabolism
Swine
Chemical
Reg. No./Substance:
0/Ghrelin; 0/Peptide Hormones; 52906-92-0/Motilin

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