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Maternal nutrition effects on lipogenic enzyme messenger RNA in adipose tissue of suckling calves.

Authors :
Murrieta, C. M.
Lake, S. L.
Scholljegerdes, E. J.
Hess, B. W.
Rule, D. C.
Source :
Journal of Animal Science. Aug2006 Supplement 1, Vol. 84, p70-71. 2p.
Publication Year :
2006

Abstract

Milk fatty acid composition can be altered through maternal dietary manipulation. We hypothesized that changes in milk fatty acid composition could affect adipose tissue development in the suckling calf. Our objective was to determine the effects of maternal prepartum energy balance and postpartum lipid supplementation on mRNA transcripts of four lipogenic enzymes in adipose tissue of suckling calves. Three-year-old Angus × Gelbvieh beef cows nutritionally managed to achieve a BCS of 4 ± 0.07 (BW = 479.3 ± 36.3 kg) or 6 ± 0.07 (BW 579.6 ± 53.1 kg) at parturition were used in a 2-yr experiment (n = 36/yr). Beginning 3 d postpartum, cows within each BCS were assigned randomly to be fed hay and a low-fat control supplement or supplements with either high-linoleate cracked safflower seeds or high-oleate cracked safflower seeds until d 60 of lactation. Diets fed to cows were formulated to be isonitrogenous and isocaloric, with 5% of DMI as fat. After 61 d of suckling these cows, calf adipose tissue biopsies were taken from the tail head region for determination of mRNA abundance. Maternal BCS did not influence mRNA abundance for lipoprotein lipase (LPL; P = 0.90), acetyl-CoA carboxylase (ACC; P = 0.96), stearoyl-CoA desaturase (SCD; P = 0.97), or fatty acid synthase (FAS; P = 0.25). Likewise, mRNA abundance of LPL (P = 0.94), ACC (P = 0.93), SCD (P = 0.98), and FAS (P = 0.86) did not differ in adipose tissue of calves suckling cows fed the various dietary treatments. We conclude that neither maternal BCS nor milk fat compositional changes occurring from 5% of DMI as fat from oil seeds during the first 60 d of lactation in beef cows was great enough to impact lipogenic enzyme mRNA abundance in adipose tissue of their suckling calves. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00218812
Volume :
84
Database :
Academic Search Index
Journal :
Journal of Animal Science
Publication Type :
Academic Journal
Accession number :
139803940