| A new strain of Butyrivibrio fibrisolvens that has high ability to isomerize linoleic acid to conjugated linoleic acid. | |
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MedLine Citation:
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PMID: 15942871 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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A new strain of Butyrivibrio fibrisolvens (TH1) that has high potential to produce conjugated linoleic acid (CLA) was isolated. Strain TH1 had higher LA isomerase (LA-I) activity, and was much more tolerant to linoleic acid (LA) than other strains examined. However, high CLA reductase (CLA-R) activity resulted in the temporary accumulation of CLA and subsequent conversion to trans-vaccenic acid (t-VA). When LA was added to growing TH1 cultures in a solution with dimethylsulfoxide (LA/DMSO), CLA produced was greater than when LA was added in a mixture with bovine serum albumin (BSA). The number of viable cells decreased upon addition of LA/DMSO, but then increased as the CLA decreased upon its conversion to t-VA. This result suggests that B. fibrisolvens can resume growing by the removal of CLA from the cells. Most CLA was released from B. fibrisolvens cells by gentle washing with BSA, suggesting that CLA bound to the cells might be removed in the rumen and large intestine. Thus, CLA production by B. fibrisolvens in the digestive tract could be increased by a reduction in CLA-R activity without accompanying an overall decrease in the cell number of B. fibrisolvens. Fatty acids (FAs) with 18 carbon backbone inducted LA-I activity, whereas unsaturated FAs induced CLA-R activity, suggesting that FAs stimulate the synthesis of LA-I and CLA-R. Providing a diet with a low ratio of unsaturated to saturated FAs may favor CLA production. |
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Authors:
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Shinji Fukuda; Hideki Furuya; Yuhgi Suzuki; Narito Asanuma; Tsuneo Hino |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: The Journal of general and applied microbiology Volume: 51 ISSN: 0022-1260 ISO Abbreviation: J. Gen. Appl. Microbiol. Publication Date: 2005 Apr |
Date Detail:
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Created Date: 2005-06-08 Completed Date: 2005-07-05 Revised Date: 2008-02-01 |
Medline Journal Info:
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Nlm Unique ID: 0165543 Medline TA: J Gen Appl Microbiol Country: Japan |
Other Details:
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Languages: eng Pagination: 105-13 Citation Subset: IM |
Affiliation:
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Department of Life Science, Meiji University, Tama-ku, Kawasaki, Japan. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Butyrivibrio
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classification,
metabolism* Dimethyl Sulfoxide / pharmacology Linoleic Acid / metabolism* Linoleic Acids, Conjugated / metabolism* Oxidoreductases Acting on CH-CH Group Donors / metabolism Serum Albumin, Bovine / pharmacology |
| Chemical | |
Reg. No./Substance:
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0/Linoleic Acids, Conjugated; 0/Serum Albumin, Bovine; 2197-37-7/Linoleic Acid; 67-68-5/Dimethyl Sulfoxide; EC 1.1.-/conjugated linoleic acid reductase, Butyrivibrio fibrisolvens; EC 1.3.-/Oxidoreductases Acting on CH-CH Group Donors |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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