title: 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.
abstract: 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.
authors.affiliation: Research Unit Muscle Biology and Growth, Leibniz Institute for Farm Animal Biology, 18196 Dummerstorf, Germany.
authors.forename: Andrea
authors.initials: A
authors.lastname: Herdmann
authors.forename: Jörg
authors.initials: J
authors.lastname: Martin
authors.forename: Gerd
authors.initials: G
authors.lastname: Nuernberg
authors.forename: Dirk
authors.initials: D
authors.lastname: Dannenberger
authors.forename: Karin
authors.initials: K
authors.lastname: Nuernberg
mesh_terms: 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
chemical_list: D005227:Fatty Acids; D005231:Fatty Acids, Unsaturated; D017962:alpha-Linolenic Acid; D019787:Linoleic Acid