| Diet-induced changes in membrane gangliosides in rat intestinal mucosa, plasma and brain. | |
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MedLine Citation:
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PMID: 15795600 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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OBJECTIVES: The objective of this study was to determine if dietary gangliosides induce changes in the ganglioside content of intestinal mucosa, plasma and brain and to identify where GM3 and GD3 are localized in the enterocyte membrane. METHODS: Male 18-day-old Sprague-Dawley rats were fed a semipurified diet containing 20% (w/w) fat. The control diet contained triglyceride, reflecting the fat formulation of an existing infant formula. Two experimental diets were formulated by adding sphingomyelin (1% w/w of total fat) or a ganglioside-enriched lipid (0.1% w/w of total fat) to the control diet fat. The ganglioside fraction of ganglioside-enriched lipid diet contained more than 80% GD3. After 2 weeks of feeding, the total and individual ganglioside and cholesterol content was measured in small intestinal mucosa, plasma and brain. RESULTS: The ganglioside-enriched lipid diet significantly increased total gangliosides in the intestinal mucosa, plasma and brain compared with the control diet. The ganglioside-enriched lipid diet significantly increased the level of GD3 (7.5% w/w) in the intestine compared with control (3.2% w/w) while decreasing the level of GM3, the major ganglioside in the intestine. The ratio of cholesterol to ganglioside in the intestinal mucosa, plasma and brain decreased significantly in rats fed the ganglioside-enriched lipid diet compared with controls. Confocal microscopy showed that GM3 is exclusively localized in the apical membrane of the enterocyte whereas GD3 is primarily localized in the basolateral membrane. CONCLUSIONS:: The authors conclude that dietary ganglioside is absorbed in the small intestine and transported to different membrane sites, altering ganglioside levels in the intestinal mucosa, plasma and brain and thus possibly having the potential to change developing enterocyte function (and possibly that of other cell lines). |
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Authors:
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Eek Joong Park; Miyoung Suh; Kal Ramanujam; Kurt Steiner; David Begg; M Thomas Clandinin |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of pediatric gastroenterology and nutrition Volume: 40 ISSN: 0277-2116 ISO Abbreviation: J. Pediatr. Gastroenterol. Nutr. Publication Date: 2005 Apr |
Date Detail:
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Created Date: 2005-03-29 Completed Date: 2005-09-13 Revised Date: 2010-11-02 |
Medline Journal Info:
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Nlm Unique ID: 8211545 Medline TA: J Pediatr Gastroenterol Nutr Country: United States |
Other Details:
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Languages: eng Pagination: 487-95 Citation Subset: IM |
Affiliation:
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Nutrition and Metabolism Research Group, Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, Alberta, Canada. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Brain Chemistry / drug effects* Cholesterol / blood, metabolism* Enterocytes / cytology, metabolism* Fluorescent Antibody Technique G(M3) Ganglioside / administration & dosage, blood, metabolism Gangliosides / administration & dosage*, blood, metabolism* Intestinal Absorption / drug effects Intestinal Mucosa / cytology, drug effects, metabolism* Male Membrane Lipids / metabolism Microscopy, Confocal Random Allocation Rats Rats, Sprague-Dawley |
| Chemical | |
Reg. No./Substance:
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0/G(M3) Ganglioside; 0/Gangliosides; 0/Membrane Lipids; 57-88-5/Cholesterol; 62010-37-1/ganglioside, GD3 |
| Comments/Corrections | |
Erratum In:
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J Pediatr Gastroenterol Nutr. 2010 Nov;51(5):687 |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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