Abstract
Serum concentrations of non-esterified fatty acids (NEFA) and very low-density lipoprotein (VLDL) in close-up dairy cattle were compared in relation to parity. Data were obtained from 37 nulli/primiparous (NP) and 24 multiparous (MU, parity: 2–7) cows between 14 days and 1 day prepartum. A positive correlation (r=0.684, P<0.01) was found between serum NEFA and VLDL concentrations in NP cows. Among the VLDL constituents, the NEFA concentration was particularly correlated with the triglyceride (TG) concentration (r=0.658, P<0.01). However, no significant correlation was found between the concentrations of NEFA and VLDL or VLDL-TG in MU cows (r=−0.028 and 0.307). These results suggest the presence of higher hepatic secretion of NEFA-derived VLDL in NP cows.
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