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Iron deficiency anemia and catecholamine metabolism
1Department of Pediatrics and Biochemistry, Erciyes University Medical Faculty, Kayseri, Turkey.
Insights
Iron therapy improved platelet monoamine oxidase (MAO) activity in anemic children. This treatment also led to a decrease in urinary metanephrine excretion, suggesting a link between iron status and these biochemical markers.
Area of Science:
- Biochemistry
- Pediatrics
- Hematology
Background:
- Iron deficiency anemia is common in infants and young children.
- Platelet monoamine oxidase (MAO) activity and metanephrine (MN) excretion are potential biomarkers affected by iron status.
Purpose of the Study:
- To evaluate the impact of oral iron therapy on platelet MAO activity and urinary MN excretion in anemic children.
- To compare these biochemical markers in anemic children with healthy controls.
Main Methods:
- 24 infants and young children with iron deficiency anemia were treated with oral iron for one month.
- Platelet MAO activity and urinary total metanephrines (MN-NMN) were measured before and after treatment.
- A control group of 13 healthy children was included for comparison.
Main Results:
- Anemic children had significantly lower baseline platelet MAO activity and urinary MN-NMN compared to controls.
- After iron therapy, platelet MAO activity significantly increased (p < 0.05).
- Urinary metanephrine excretion decreased after iron treatment (p < 0.05), despite incomplete normalization of hemoglobin and transferrin saturation.
Conclusions:
- Oral iron therapy positively influences platelet MAO activity in children with iron deficiency anemia.
- Iron repletion is associated with altered urinary metanephrine excretion.
- These findings suggest that iron status impacts MAO activity and catecholamine metabolism.
Abstract:
To assess the effects of iron therapy on platelet monoamine oxidase (MAO) activity and urinary excretion of total metanephrines (MN) in infants and young children with iron deficiency anemia, 24 subjects were tested before and after one month of oral iron treatment. Thirteen healthy children comprised the control group. In the control group, platelet MAO level was 0.21 +/- 0.02 U/mg protein (mean +/- SE), urinary total metanephrine was 2.51 +/- 0.47 micrograms/mg creatinine. In cases with iron deficiency, mean platelet MAO level was 47.6% lower (p less than 0.005) whereas mean urinary metanephrine plus normetanephrine (MN-NMN) was only 20.7% lower (p greater than 0.05) than the control values. After one month, the anemic patients receiving oral iron therapy showed a significant increase in hemoglobin concentration, per cent transferrin saturation and platelet MAO activity (p less than 0.05). However, urinary metanephrine excretion was found to be lower in this group when compared to the metanephrine levels in iron deficiency before the medication (p less than 0.05). Although hemoglobin and transferrin saturation did not return to normal levels, these findings suggested that platelet MAO activity increased and urinary excretion of metanephrines decreased after iron medication.