Hemoglobin Regeneration Efficiency in Anemic Rats: Effects on Bone Mineral Composition and Biomechanical Properties

Author(s)

Lobo, Alexandre Rodrigues ^[1] ; Szpak Gaievski, Eduardo Henrique ^[1] ; Colli, Celia ^[1]

Affiliation

^[1] Univ Sao Paulo, Fac Pharmaceut Sci, Dept Food & Expt Nutr, BR-05508900 Sao Paulo - Brazil

• Document type: Journal article
• Source: BIOLOGICAL TRACE ELEMENT RESEARCH; v. 143, n. 1, p. 403-411, OCT 2011.
• Web of Science Citations: 5

Abstract

This study reports the effects of dietary iron (Fe) deficiency and recovery on bone mineral composition and strength in anemic rats submitted to a hemoglobin (Hb) repletion assay. Weanling male Wistar rats were fed a low-Fe diet (12 mg/kg) for 15 days followed by 2 weeks of Fe repletion with diets providing 35 mg Fe/kg as either ferrous sulfate (n = 8) or ferric pyrophosphate (FP; n = 12). At final day of each period (depletion and repletion), Fe-adequate animals were also euthanized. Iron status (blood Hb, Hb Fe pool, Hb regeneration efficiency), tibia mineral concentrations (Ca, Mg, Fe, Cu, and Zn) and biomechanical properties were evaluated. Iron-deficient rats had lower tibia Fe and Mg levels and bone strength when compared to controls. Yield load and resilience were positively related to tibia Mg levels (r = 0.47, P = 0.02 and r = 0.56, P = 0.004, respectively). Iron repletion did not recover tibia Mg concentrations impaired by Fe deficiency. Moreover, bone elastic properties were negatively affected by FP consumption. In conclusion, bone mineral composition and strength were affected by Fe deficiency, whereas dietary Fe source influenced tibia Mg and resistance in the period during which rats were recovering from anemia. (AU)

• FAPESP's process: 06/01735-0 - Physiological consequences of different ingestion levels of iron and calcium and their interaction with phytates and fructans: study in rats
• Grantee: Célia Colli
• Support Opportunities: Regular Research Grants