Blood manganese concentration is elevated in infants with iron deficiency
Sangkyu Park1, Chang-Sun Sim, Heun Lee
1Department of Pediatrics, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, South Korea.
Abstract:
The present study was done to determine whether blood Mn concentration is elevated in iron-deficient infants. Thirty-one infants with iron deficiency and thirty-six control subjects (6-24 months of age) were tested for blood Mn concentration, complete blood counts, serum ferritin, and serum iron/transferring iron-binding capacity (Fe/TIBC). All the 31 iron-deficient infants were treated with iron supplement; however, 19 of them underwent blood Mn checkup again in compliance with follow-up schedule when their ferritin levels returned to the normal range. Iron therapies were done for 1-6 months (mean, 2.8; standard deviation, 1.6) using ferric hydroxide-polymaltose complex (6 mg/kg Fe(3+) daily). Infants with iron deficiency had a higher mean blood Mn concentration than controls (2.550 vs. 1.499 μg/dL, respectively). After iron therapy, the blood Mn levels of iron-deficient infants significantly decreased compared to their pre-therapy levels (2.045 vs. 2.971 μg/dL, respectively), and their hemoglobin and ferritin levels significantly increased. After adjustment for covariates (e.g., age and breast-feeding), multiple linear regression models showed that increased blood Mn levels were significantly associated with low serum ferritin and hemoglobin levels, whereas with Fe/TIBC there was only a tendency. Our results indicate that iron deficiency increases blood Mn levels in infants, presumably by increasing Mn absorption.
Insights
Iron deficiency in infants is linked to higher blood manganese (Mn) levels. Supplementing with iron normalized Mn levels, suggesting iron deficiency increases Mn absorption.
Area of Science:
- Pediatric Nutrition
- Trace Element Metabolism
- Hematology
Background:
- Iron deficiency is common in infants and can affect various physiological processes.
- Manganese (Mn) is an essential trace element, but its levels in relation to iron status are not well understood in infants.
- Understanding nutrient interactions is crucial for optimal infant health and development.
Purpose of the Study:
- To investigate the relationship between iron deficiency and blood manganese concentration in infants.
- To determine if iron supplementation affects blood manganese levels in iron-deficient infants.
Main Methods:
- A comparative study involving 31 iron-deficient infants and 36 healthy controls (aged 6-24 months).
- Measurements included blood manganese, complete blood counts, serum ferritin, and iron/transferrin iron-binding capacity (Fe/TIBC).
- Iron-deficient infants received iron supplementation, with follow-up measurements for a subset (n=19).
Main Results:
- Infants with iron deficiency exhibited significantly higher blood manganese concentrations compared to controls.
- Following iron therapy, blood manganese levels in previously deficient infants decreased significantly.
- Iron supplementation led to significant increases in hemoglobin and ferritin levels in the treated infants.
Conclusions:
- Iron deficiency is associated with elevated blood manganese levels in infants.
- Iron therapy effectively reduces blood manganese concentrations in iron-deficient infants.
- The findings suggest that iron deficiency may enhance manganese absorption in infants.
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