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Effects of Dietary Vitamin B6 Supplementation on Fillet Fatty Acid Composition and Fatty Acid Metabolism of Rainbow Trout Fed Vegetable Oil Based Diets
journal contribution
posted on 2012-02-15, 00:00 authored by Shyamalie Sendadheera, Giovanni TurchiniGiovanni Turchini, Thanongsak Thanuthong, David FrancisDavid FrancisFish oil replacement in aquaculture feeds results in major modifications to the fatty acid makeup of cultured fish. Therefore, in vivo fatty acid biosynthesis has been a topic of considerable research interest. Evidence suggests that pyridoxine (vitamin B6) plays a role in fatty acid metabolism, and in particular, the biosynthesis of LC-PUFA has been demonstrated in mammals. However, there is little information on the effects of dietary pyridoxine availability in fish fed diets lacking LC-PUFA. This study demonstrates a relationship between dietary pyridoxine supplementation and fatty acid metabolism in rainbow trout. In particular, the dietary pyridoxine level was shown to modulate and positively stimulate the activity of the fatty acid elongase and Δ-6 and Δ-5 desaturase enzymes, deduced by the whole-body fatty acid balance method. This activity was insufficient to compensate for a diet lacking in LC-PUFA but does highlight potential strategies to maximize this activity in cultured fish, especially when fish oil is replaced with vegetable oils.
History
Journal
Journal of Agricultural and Food ChemistryVolume
60Issue
9Pagination
2343 - 2353Publisher
American Chemical SocietyLocation
Washington, United StatesISSN
0021-8561eISSN
1520-5118Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2012, American Chemical SocietyUsage metrics
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No categories selectedKeywords
ALAAquacultureDesaturaseDHAElongaseEPAFish oil replacementPyridoxineVitamin B 6Science & TechnologyLife Sciences & BiomedicinePhysical SciencesAgriculture, MultidisciplinaryChemistry, AppliedFood Science & TechnologyAgricultureChemistryvitamin B-6MURRAY CODFISH-OILLIVERDESATURATIONELONGATIONLIPIDSDEFICIENCYMICROSOMESSERUM
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