| Effect of dietary protein on hepatic and extrahepatic phase I and phase II drug metabolizing enzymes. | |
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MedLine Citation:
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PMID: 8960151 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Weanling male rats were fed low (LP, 7.5%), standard (SP, 15%) or high protein (HP, 45%) diet for 7 or 14 days ad libitum, and cytochrome c reductase (CYC) and UDP-glucuronosyltransferase (UGT) enzyme activities were determined in intestine, kidney and liver microsomes. HP diet increased CYC activity in intestine and kidney, while LP diet had no effect. Hepatic CYC activity declined with decreasing level of dietary protein. Liver and intestine UGT activities were higher on an LP diet, while kidney enzyme activities were higher on an HP diet. UGT activity toward alpha-naphthol, a UGT1 isoform substrate, was modulated by dietary protein in all tissues, while UGT activity toward 4-hydroxybiphenyl, a substrate for a second UGT1 isoform, was affected only in the intestine. The duration of feeding affected CYC and UGT activities in the intestine. This observation may be explained by the dynamic nature of intestinal tissue. The observation of unique tissue and enzyme responses suggests that generalizations regarding metabolic response to diets based on hepatic studies or single enzymes, may be erroneous. |
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Authors:
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P K Baijal; D W Fitzpatrick |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Toxicology letters Volume: 89 ISSN: 0378-4274 ISO Abbreviation: Toxicol. Lett. Publication Date: 1996 Dec |
Date Detail:
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Created Date: 1997-01-13 Completed Date: 1997-01-13 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 7709027 Medline TA: Toxicol Lett Country: NETHERLANDS |
Other Details:
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Languages: eng Pagination: 99-106 Citation Subset: IM |
Affiliation:
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Department of Foods and Nutrition, University of Manitoba, Winnipeg, Canada. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Body Weight / drug effects Dietary Proteins / administration & dosage* Glucuronosyltransferase / drug effects, metabolism* Intestines / drug effects, enzymology Isoenzymes / drug effects, metabolism Kidney / drug effects, enzymology Liver / drug effects, enzymology Male Microsomes / drug effects, enzymology* NADH Dehydrogenase / drug effects, metabolism* Rats Rats, Sprague-Dawley |
| Chemical | |
Reg. No./Substance:
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0/Dietary Proteins; 0/Isoenzymes; EC 1.6.99.3/NADH Dehydrogenase; EC 2.4.1.17/Glucuronosyltransferase |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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