Relationship between Plasma Vitamin C and Serum Diagnostic Biochemical Markers in Lactating Cows

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  • PADILLA Licza
    Division of Applied Biosciences, Graduate School of Agriculture, Kyoto University
  • MATSUI Tohru
    Division of Applied Biosciences, Graduate School of Agriculture, Kyoto University
  • SHIBANO Ken-ichi
    Hyogo Prefectural Federation of Agricultural Mutual Aid Association
  • KATAMOTO Hiromu
    Department of Veterinary Sciences, Faculty of Agriculture, Miyazaki University
  • YANO Hideo
    Division of Applied Biosciences, Graduate School of Agriculture, Kyoto University

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  • Internal medicine: Relationship between plasma vitamin C and serum diagnostic biochemical markers in lactating cows

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Abstract

We investigated the relationship between plasma vitamin C concentration and serum levels of some diagnostic biochemical markers in 118 lactating Holstein cows. Blood sample was collected once from each cow and we measured the plasma vitamin C concentration and the serum levels of glucose, β-hydroxybutyrate, free fatty acids, triacylglycerol, total cholesterol, albumin, total bilirubin, alkaline phosphatase, aspartate aminotransferase and γ-glutamyltransferase. The regression of plasma vitamin C with each serum diagnostic biochemical marker indicated that the vitamin C concentration significantly decreased as glucose, alkaline phosphatase or aspartate aminotransferase level increased and as total cholesterol or albumin concentration decreased. Furthermore, the plasma vitamin C concentration was significantly lower in the cows showing that each of these marker levels was out of its reference interval than in the cows showing that the marker level was within its reference interval. The significant correlations were observed among total cholesterol, albumin, alkaline phosphatase and aspartate aminotransferase levels, to which the glucose concentration was not related. These results showed that the plasma vitamin C concentration was low in the cows that had concurrently low levels of total cholesterol and albumin, and high levels of alkaline phosphatase and aspartate aminotransferase. Therefore, a hepatic malfunction possibly decreases plasma vitamin C concentration through suppressing vitamin C production. On the other hand, the high level of glucose possibly decreases plasma vitamin C concentration through suppressing vitamin C recycling.<br>

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