Effect of dietary n-3 and n-6 PUFA on lipid composition of different tissues of German Holstein bulls and the fate of bioactive fatty acids during processing.
The present study investigated the effects of dietary linolenic acid (ALA) versus linoleic acid (LA) on meat quality, fatty acid composition, and stearoyl-CoA desaturase (SCD) activity in longissimus muscle (MLD) and subcutaneous adipose tissue (SAT) of German Holstein bulls and the transfer of beneficial n-3 fatty acids into German corned beef sausages (GCB). Feeding LA- and ALA-enriched diets increased essential fatty acids in MLD and SAT. The ALA-supplemented diet decreased significantly the SCD activity in MLD and SAT, resulting in a reduced relative concentration of oleic acid in muscle. The relative proportion of CLAcis-9,trans-11 analyzed by HPLC was not different between groups in either tissue. GCB were produced by using the lean meat of bulls. Beef products of bulls fed the ALA-supplemented diet were rich in ALA and n-3 LC PUFA. Most importantly, there was no loss of n-3 fatty acids during processing under production conditions. Conclusively, the n-6/n-3 fatty acid ratio was beneficially low.
Herdmann
Andrea
A
Research Unit Muscle Biology and Growth, Leibniz Institute for Farm Animal Biology, 18196 Dummerstorf, Germany.
Martin
Jörg
J
Nuernberg
Gerd
G
Dannenberger
Dirk
D
Nuernberg
Karin
K
D000821:Animal Feed / Q000032:analysis*; D000818:Animals; D002417:Cattle / Q000378:metabolism*; D005227:Fatty Acids / Q000032:analysis / Q000378:metabolism*; D005231:Fatty Acids, Unsaturated / Q000737:chemistry / Q000378:metabolism*; D005511:Food Handling; D019787:Linoleic Acid / Q000378:metabolism; D008297:Male; D008461:Meat Products / Q000032:analysis*; D018482:Muscle, Skeletal / Q000737:chemistry* / Q000378:metabolism; D017962:alpha-Linolenic Acid / Q000378:metabolism
D005227:Fatty Acids; D005231:Fatty Acids, Unsaturated; D017962:alpha-Linolenic Acid; D019787:Linoleic Acid