Martysiak-Zurowska Dorota, Zalewski Kazimierz, Kamieniarz Robert
Department of Food Chemistry, Technology and Biotechnology, Chemical Faculty, Gdańsk University of Technology, Poland.
Comp Biochem Physiol B Biochem Mol Biol. 2009 Jun;153(2):145-8. doi: 10.1016/j.cbpb.2009.02.007. Epub 2009 Feb 23.
The fatty acid (FA) composition of depot adipose tissues in the raccoon dog (Nyctereutesprocyonoides) and the European beaver (Castorfiber) differs from that reported for the lipids of other monogastric animals, especially with regard to the presence of trans-octadecenoic acids. The concentrations of pentadecanoic acid 15:0 (PA) and heptadecanoic acid 17:0 (HA) in the lipids of the tested animals ranged from 0.23 to 0.79% and from 0.33 to 2.35% of total FAs, respectively. The total content of their monounsaturated cis isomers varied from 0.12 to 2.75% for pentadecanoic acid (c-PA) and from 0.38 to 2.45% for heptadecanoic acid (c-HA). It is interesting that the tissues of European beavers and raccoon dogs contained also trans isomers of octadecenoic acid C18:1 (t-OA) including vaccenic acid C18:1,11t (VA), typical of ruminants. The presence of FAs with an uneven number of carbon atoms and trans-octadecenoic acids in depot adipose tissue is indicative of the process of hydrogenation of polyunsaturated fatty acids (linoleic acid and alpha-linolenic acid) in the digestive tract. The tissues of badgers also contained t-OA (from below 0.05% in the liver to 0.44% in the kidneys), but no VA was found.
貉（Nyctereutes procyonoides）和欧洲河狸（Castor fiber）储存脂肪组织中的脂肪酸（FA）组成与其他单胃动物脂质的报道不同，特别是在反式十八碳烯酸的存在方面。受试动物脂质中十五烷酸15:0（PA）和十七烷酸17:0（HA）的浓度分别占总脂肪酸的0.23%至0.79%和0.33%至2.35%。它们的单不饱和顺式异构体的总含量，十五烷酸（c-PA）为0.12%至2.75%，十七烷酸（c-HA）为0.38%至2.45%。有趣的是，欧洲河狸和貉的组织中还含有十八碳烯酸C18:1的反式异构体（t-OA），包括反式11-十八碳烯酸（VA），这是反刍动物特有的。储存脂肪组织中碳原子数不均一的脂肪酸和反式十八碳烯酸的存在表明消化道中多不饱和脂肪酸（亚油酸和α-亚麻酸）的氢化过程。獾的组织中也含有t-OA（从肝脏中的低于0.05%到肾脏中的0.44%），但未发现VA。
