| Effects of dl-2-hydroxy-4-methylthiobutyrate on the first-pass intestinal metabolism of dietary methionine and its extra-intestinal availability. | |
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MedLine Citation:
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PMID: 20064283 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The present study was conducted in a one-factorial arrangement to determine the effects of dl-2-hydroxy-4-methylthiobutyrate (dl-HMTB) on the first-pass intestinal metabolism of dietary methionine and its extra-intestinal availability. Barrows (n 6; aged 35 d; weight 8.6 kg), implanted with arterial, portal, mesenteric and gastric catheters, were fed a diet containing dl-methionine (dl-MET) or dl-HMTB once hourly and infused intramesenterically with 1 % p-aminohippurate and intragastrically with [1-13C]methionine at 7.0 mumol/kg body weight per h. Arterial and portal blood samples were taken at hourly intervals until 6 h of tracer infusion and pigs was then killed for collection of muscle, intestine, liver and kidney samples. The net portal appearance of methionine, expressed as the fraction of ingested directly available l-methionine, was higher (P < 0.05) in the dl-HMTB than in the dl-MET diet, and there was no difference (P = 0.26) in the fractional portal balance of [1-13C]methionine between the diets. [1-13C]methionine enrichment (tracer:tracee ratio; mol/100 mol amino acid) in the jejunum, arterial and portal plasma, liver, kidney and muscle was also not different (P>0.05) between the groups. Over the 6 h period after the start of feeding, the average concentration of citrulline both in the arterial and portal plasma was higher (P < 0.05) in the dl-HMTB than in the dl-MET group, and arterial plasma ornithine and taurine concentration was also higher (P < 0.05) in the dl-HMTB than in the dl-MET group. However, plasma urea concentration both in the arterial and portal vein was lower (P < 0.05) in the dl-HMTB than in the dl-MET group. These results suggested that the potential difference in the first-pass use of methionine by the intestine between the dl-HMTB and dl-MET diets might affect intestinal and systemic metabolism of other amino acids, which may provide new important insights into nutritional efficiency of different methionine sources. |
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Authors:
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Zhengfeng Fang; Feiruo Huang; Jie Luo; Hongkui Wei; Libao Ma; Siwen Jiang; Jian Peng |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't Date: 2010-01-12 |
Journal Detail:
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Title: The British journal of nutrition Volume: 103 ISSN: 1475-2662 ISO Abbreviation: Br. J. Nutr. Publication Date: 2010 Mar |
Date Detail:
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Created Date: 2010-02-19 Completed Date: 2010-03-18 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0372547 Medline TA: Br J Nutr Country: England |
Other Details:
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Languages: eng Pagination: 643-51 Citation Subset: IM |
Affiliation:
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Key Laboratory of Animal Genetics, Breeding and Reproduction of Ministry of Education and Key Laboratory of Swine Genetics and Breeding of Ministry of Agriculture, Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Huazhong Agricultural University, Wuhan 430070, China. |
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| MeSH Terms | |
Descriptor/Qualifier:
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Amino Acids
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blood Animals Diet* Dietary Proteins / metabolism* Intestinal Absorption / physiology Intestine, Small / metabolism* Kidney / metabolism Liver / metabolism Methionine / analogs & derivatives*, blood, metabolism* Muscles / metabolism Portal System / metabolism Swine Urea / blood p-Aminohippuric Acid |
| Chemical | |
Reg. No./Substance:
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0/Amino Acids; 0/Dietary Proteins; 57-13-6/Urea; 583-91-5/alpha-hydroxy-gamma-methylmercaptobutyric acid; 61-78-9/p-Aminohippuric Acid; 63-68-3/Methionine |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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