Effect of Body Iron Stores on Indices of Biosynthesis and Destruction of Red Blood Cells After a Single Session of Cycling Exercise

Kawano, Yukari; Tokashiki, Akiko; Mekata, Yuko; Hayashi, Keiko; Matsumoto, Harumi; Uchiyama, Iwao

doi:10.7600/jspfsm1949.51.225

Cited by 2 publications

(2 citation statements)

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“…The osmotic fragility of RBC was run in duplicate and measured using the heparinized RBC fraction according to Beutler (3). δ-ALAD activity was run in duplicate, and assayed using the heparinized RBC fraction as described previously (13,15,16). Two ml of heparinized blood was centrifuged at 3,000 rpm for 10 min at 5 ºC and the resultant supernatant was discarded.…”

Section: Blood Analysismentioning

confidence: 99%

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Effects of a Fixed Dietary Intake on Changes in Red Blood Cell Delta-Aminolevulinate Dehydratase Activity and Hemolysis in Female Rhythmic Gymnasts: A Two-Year Follow-Up Study ▀

Ishizaki¹,

Koshimizu²,

Yanagisawa³

et al. 2006

International Journal of Sport Nutrition and Exercise Metabolism

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This study was to assess the effect of a fixed dietary intake on biomarkers of red blood cell (RBC) biosynthesis and degradation. Over a two-year period, eight collegiate rhythmic gymnasts participated in this study. During the first year, they ate self-selected diets. During the second year, a fixed dietary intake involving consumption of common Japanese foods containing 15 mg iron and 1500 kcal energy was maintained for 4 wk at the beginning of the program. Fixed dietary intakes resulted in significantly increased intakes of protein, minerals and vitamins, and significantly decreased fat intake, but total energy and carbohydrate intakes were unchanged. Mean values of RBC, Hb, Ht, or TIBC were not affected by the intervention. A fixed dietary intervention appeared to enhance RBC turnover by increasing the capacity for erythrocyte biosynthesis and degradation, although the prevalence of iron-deficiency anemia remained unchanged.

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Section: Blood Analysismentioning

confidence: 99%

“…Direct comparative measurements of key factors affecting the biosynthesis and degradation of RBC during training are not readily apparent. We then estimated delta-aminolevulinate dehydratase (δ-ALAD) activity (16) and haptoglobin (hp) concentration as the biosynthesis and degradation indices of RBC.…”

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confidence: 99%