V. Gerfault et al., Lipogenic enzyme activities in subcutaneous adipose tissue and skeletal muscle from neonatal pigs consuming maternal or formula milk, REPROD NUTR, 40(2), 2000, pp. 103-112
The influence of maternal and formula milk on lipid metabolism was studied
in 7-day-old pigs. Lipid content, fatty acid composition, lipogenic enzyme
activities and expression of GLUT4 mRNA were determined in subcutaneous adi
pose tissue and skeletal muscle from pigs that were bottle-fed formula milk
(F) or sow milk (SM), or were sow-reared (SR). Bottle-fed pigs were isoene
rgetically fed and achieved similar daily body weight gain. SR pigs have a
higher (P < 0.05) body weight gain than bottle-fed pigs. Lipid content of a
dipose tissue was lower (P < 0.05) in F than in SM and SR pigs. In muscle,
lipid content did not differ significantly between groups. In adipose tissu
e, acetyl-CoA-carboxylase (CBX), fatty acid synthase (FAS), malic enzyme (M
E), glucose-6-phosphate-dehydrogenase (G6PDH) and lipoprotein lipase (LPL)
activities and GLUT4 mRNA levels were higher (P < 0.05) in SR than in bottl
e-fed pigs. In muscle, ME and G6PDH activities and GLUT4 mRNA were higher (
P < 0.05) in F than in SM and SR pigs; LPL was not detected. The pre sent s
tudy indicates that lipogenic enzyme activities and GLUT4 mRNA expression a
re regulated differently in subcutaneous adipose tissue and skeletal muscle
in the neonatal pig.