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Echium oil provides no benefit over linseed oil for (n-3) long-chain PUFA biosynthesis in rainbow trout.
J Nutr. 2012 Aug; 142(8):1449-55.JN

Abstract

The implementation of alternative lipid sources for use in aquaculture is of considerable interest globally. However, the possible benefit of using stearidonic acid (SDA)-rich fish oil (FO) alternatives has led to scientific confusion. Two hundred and forty rainbow trout (Oncorhynchus mykiss) were fed 1 of 4 diets (3 replicate tanks/treatment) containing either FO, linseed oil (LO), echium oil, or mixed vegetable oil (72% LO, 23% sunflower oil, and 6% canola oil) as the dietary lipid source (16.5%) for 73 d to investigate the competition and long-chain PUFA (LC-PUFA) biosynthesis between the fatty acid substrates α-linolenic acid (ALA) and SDA. SDA was more efficiently bioconverted to LC-PUFA compared with ALA. However, when the dietary lipid sources were directly compared, the increased provision of C18 PUFA within the LO diet resulted in no significant differences in (n-3) LC-PUFA content compared with fish fed the other diets. This study therefore shows that, rather than the previously speculated substrate competition, the limiting process in the apparent in vivo (n-3) LC-PUFA biosynthesis appears to be substrate availability. Rainbow trout fed the SDA- and ALA-rich dietary lipid sources subsequently had similar significant reductions in (n-3) LC-PUFA compared with fish fed the FO diet, therefore providing no additional dietary benefit on (n-3) LC-PUFA concentrations.

Authors+Show Affiliations

School of Life and Environmental Sciences, Deakin University, Warrnambool, Victoria, Australia.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Randomized Controlled Trial
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

22739372

Citation

Cleveland, Benjamin J., et al. "Echium Oil Provides No Benefit Over Linseed Oil for (n-3) Long-chain PUFA Biosynthesis in Rainbow Trout." The Journal of Nutrition, vol. 142, no. 8, 2012, pp. 1449-55.
Cleveland BJ, Francis DS, Turchini GM. Echium oil provides no benefit over linseed oil for (n-3) long-chain PUFA biosynthesis in rainbow trout. J Nutr. 2012;142(8):1449-55.
Cleveland, B. J., Francis, D. S., & Turchini, G. M. (2012). Echium oil provides no benefit over linseed oil for (n-3) long-chain PUFA biosynthesis in rainbow trout. The Journal of Nutrition, 142(8), 1449-55. https://doi.org/10.3945/jn.112.161497
Cleveland BJ, Francis DS, Turchini GM. Echium Oil Provides No Benefit Over Linseed Oil for (n-3) Long-chain PUFA Biosynthesis in Rainbow Trout. J Nutr. 2012;142(8):1449-55. PubMed PMID: 22739372.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Echium oil provides no benefit over linseed oil for (n-3) long-chain PUFA biosynthesis in rainbow trout. AU - Cleveland,Benjamin J, AU - Francis,David S, AU - Turchini,Giovanni M, Y1 - 2012/06/27/ PY - 2012/6/29/entrez PY - 2012/6/29/pubmed PY - 2012/10/12/medline SP - 1449 EP - 55 JF - The Journal of nutrition JO - J Nutr VL - 142 IS - 8 N2 - The implementation of alternative lipid sources for use in aquaculture is of considerable interest globally. However, the possible benefit of using stearidonic acid (SDA)-rich fish oil (FO) alternatives has led to scientific confusion. Two hundred and forty rainbow trout (Oncorhynchus mykiss) were fed 1 of 4 diets (3 replicate tanks/treatment) containing either FO, linseed oil (LO), echium oil, or mixed vegetable oil (72% LO, 23% sunflower oil, and 6% canola oil) as the dietary lipid source (16.5%) for 73 d to investigate the competition and long-chain PUFA (LC-PUFA) biosynthesis between the fatty acid substrates α-linolenic acid (ALA) and SDA. SDA was more efficiently bioconverted to LC-PUFA compared with ALA. However, when the dietary lipid sources were directly compared, the increased provision of C18 PUFA within the LO diet resulted in no significant differences in (n-3) LC-PUFA content compared with fish fed the other diets. This study therefore shows that, rather than the previously speculated substrate competition, the limiting process in the apparent in vivo (n-3) LC-PUFA biosynthesis appears to be substrate availability. Rainbow trout fed the SDA- and ALA-rich dietary lipid sources subsequently had similar significant reductions in (n-3) LC-PUFA compared with fish fed the FO diet, therefore providing no additional dietary benefit on (n-3) LC-PUFA concentrations. SN - 1541-6100 UR - https://www.unboundmedicine.com/medline/citation/22739372/Echium_oil_provides_no_benefit_over_linseed_oil_for__n_3__long_chain_PUFA_biosynthesis_in_rainbow_trout_ DB - PRIME DP - Unbound Medicine ER -