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Safety of dietary conjugated α-linolenic acid (CLNA) in a neonatal pig model

Castellano, C.A., Plourde, M., Briand, S.I., Angers, P., Giguère, A., Matte, J.J. (2014). Safety of dietary conjugated α-linolenic acid (CLNA) in a neonatal pig model, 64 119-125. http://dx.doi.org/10.1016/j.fct.2013.11.025

Abstract

The aim of the present study was to perform a short-term safety evaluation of dietary mono-conjugated α-linolenic acid isomers (CLNA; c9-t11-c15-18:3. +. c9-t13-c15-18:3) using a neonatal pig model. CLNA diet was compared with three other dietary fats: (1) conjugated linoleic acid (CLA; c9-t11 18:2. +. t10-c12-18:2), (2) non-conjugated n-3 PUFA and (3) n-6 PUFA. Thirty-two piglets weaned at 3. weeks of age were distributed into four dietary groups. Diets were isoenergetic and food intake was controlled by a gastric tube. Mono-CLNA diet did not significantly change body or organ weight, carcass composition and most biochemical parameters including; glucose, cholesterol, triglycerides, creatinine, blood urea nitrogen, hepatic enzymes and electrolytes levels in blood ( P≥. 0.09). Conversely, the n-3 PUFA composition of the brain, liver and heart decreased by 6-21% in the CLNA-fed group compared to animals fed nonconjugated n-3 PUFA ( P<. 0.01). Responses to dietary treatments were tissue-specific, with the liver and the brain being the most deprived in n-3 PUFA. Our results support that short-term intake of mono-CLNA is safe in neonatal pigs but n-3 PUFA reduction in tissues deserves to be further investigated before using long-term nutritional supplementation in pigs and other animal models and before moving to clinical trials. © 2013 .

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