Studies on the Normal Range of α-Tocopherol Levels in Plasma and RBC Membranes in Childhood, as Related to the Hydrogen Peroxide Hemolysis

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Other Title
  • 過酸化水素溶血率から見た小児の血漿並びに赤血球膜α-Tocopherolの正常域の検討
  • カサンカ スイソ ヨウケツリツ カラ ミタ ショウニ ノ ケッショウ ナラビニ

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Using high performance liquid chromatography, α-tocopherol levels in the plasma and RBC were studied, as related to the hydrogen peroxide (H_2O_2) hemolysis, and then the normal range of them was estimated on the basis of H_2O_2 hemolysis. 1. Under our condition of the H_2O_2 hemolysis test, the level of less than 30% hemolysis was within normal range. 2. More than 30% of H_2O_2 hemolysis was accounted for 83.3% in the premature and neonatal age group, while the hemolysis all the cases of more than 1 month of age was less than 30%. 3. The distribution of plasma tocopherol levels in the group with less than 30% hemolysis was 300~1,100μg/dl, while that of RBC was 100~300/μg/dl packed cells. On the basis of 85 percentile of the group with more than 30% hemolysis, the lower limit of plasma α-tocopherol level was estimated as 450μg/dl. On the other hand, the lower limit of RBC α-tocopherol level was 125μg/dl packed cells, on the basis of 15 percentile of the group with less than 30% hemolysis, because of the finding that the distribution in α-tocopherol levels between both the groups were more clearly differed in the RBC than plasma. 4. The correlation with plasma α-tocopherol levels (X) and RBC levels (Y) extended in the range of Y=0.14X to Y=0.76X. 5. The mean values of the ratio of RBC α-tocopherol to plasma α-tocopherol were about 0.3 in each age group, where the ratios were widely distributed.

Journal

  • VITAMINS

    VITAMINS 54 (3), 95-103, 1980

    THE VITAMIN SOCIETY OF JAPAN

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