Effect of Dietary-Iron Supplementation on the Activity of .DELTA.-Aminolevulinic Acid Dehydratase(.DELTA.-ALAD) in Human Erythrocytes.

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  • Kawano Yukari
    Laboratory of Sport Nutrition, Japan Women's College of Physical Education
  • Takeda Hajime
    Laboratory of Track and Field, Japan Women's College of Physical Education
  • Suzuki Taeko
    Department of Nutrition and Biochemistry, National Institute of Public Health
  • Kajimoto Masatoshi
    Department of Nutrition and Biochemistry, National Institute of Public Health

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  • 女子学生ランナーの合宿時における鉄補足が赤血球δ‐ＡＬＡＤ活性に及ぼす影響
  • ジョシ ガクセイ ランナー ノ ガッシュクジ ニ オケル テツ ホソク ガ セッケッキュウ デルタ ALAD カッセイ ニ オヨボス エイキョウ

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The effect was studied dietary iron administration on the capacity for hematogenesis of athletes under training. 16 female collegiate distance runners with no iron deficiency were divided into two groups; one group was given oolong tea containing iron (III) oligogalacturonic acid (the iron group), while the other was given straight oolong tea (the control group). The numbers of red blood cells (RBC) and reticulocytes, the values for hemoglobin (Hb), hematocrit (Ht), serum iron, serum ferritin and total iron-binding capacity (TIBC), and the activity of δ-ALAD were each measured before and after a summer training camp.<BR>The results show that energy expenditure was significantly higher after the camp than before in both groups.<BR>The respective intake of protein, fat, carbohydorate, calcium, iron, vitamin B., vitamin B2 and vitamin D was significantly increased in the iron group during the camp, while only the respective intake of protein, iron and vitamin D was significantly increased in the control group.<BR>The values for creatine kinase (CK) activity, Ht, mean corpuscular volume (MCV) and reticulocytes were each significantly higher after the camp than before the camp in both groups.<BR>Glutamic oxaloacetic transaminase (GOT), glutamic pyruvic transaminase (GPT) and γ-GTP values were all significantly higher after the camp than before for the control group, but dietary iron administration prevented any such significant changes during the camp.<BR>The serum iron level before the camp was significantly higher in the control group than in the iron group, but this level of serum iron in the control group was significantly lower after the camp. There was no significant difference after the camp in the serum iron levels of the two groups.<BR>δ-ALAD activity (nmol/ml/hr) was significantly higher after the camp, but only in the iron group.<BR>There was no significant difference in δ-ALAD activity between the two groups before or after the camp.<BR>These results lead to the proposals that a training camp would improve the nutritional conditions of female collegiate athletes, dietary iron supplementation would affect the body iron status, and increased physical exercise during the camp would activate the capacity for hematogenesis.

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