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Effect of acetic acid and glucose on fatty acid synthesis related gene expression profiles during bovine intramuscular adipogenesis
Ruminants synthesize lipids using glucose and volatile fatty acids (VFAs) produced by the microorganisms in the rumen. Bovine intramuscular adipose tissue (BIP) were treated with various concentrations of acetic acid and glucose. The relative mRNA levels of fatty acid synthase (FASN), which are involved in fatty acid synthesis, significantly increased with rising acetic acid concentration, but not with rising glucose concentration. TG content increased in acetic acid and glucose concentrations. Saturated fatty acid proportions were significantly higher in 1.0g⁄l D-glucose than in 4.5g⁄l D-glucose (P<0.05), whereas those of monounsaturated fatty acid were significantly higher in 4.5g⁄l D-glucose than in 1.0g⁄l D-glucose (P<0.05). These results indicate that acetic acid and glucose is essential for fatty acid synthesis and accumulation.
Keywords: Japanese Black cattle, Acetic acid, Fatty acid composition
