Serum ferritin concentrations in transfusion dependent beta-thalassaemia

Area of Science:

• Hematology
• Clinical Biochemistry
• Pharmacology

Background:

• Patients requiring regular red blood cell transfusions are at risk of iron overload.
• Iron overload can occur due to increased transfusion load and impaired iron metabolism.
• Serum ferritin is often used as a marker for iron status.

Purpose of the Study:

• To evaluate the accuracy of serum ferritin in assessing iron overload in transfusion-dependent patients.
• To identify factors contributing to iron overload despite transfusion programs.
• To analyze reasons for poor response to iron chelation therapy.

Main Methods:

• Analysis of serum ferritin concentrations in patients with varying transfusion loads.
• Assessment of iron metabolism, including apoferritin synthesis and ferritin-hemosiderin conversion.
• Review of iron chelation therapy compliance, dosage, and initiation timing.

Main Results:

• Serum ferritin levels did not consistently correlate with the transfusion load, indicating limitations in its use for monitoring iron overload.
• Impaired apoferritin synthesis and conversion of ferritin to hemosiderin contribute to inaccurate ferritin estimations.
• Poor compliance, inadequate deferoxamine dosage, and delayed initiation of iron chelation therapy were associated with treatment failure.

Conclusions:

• Serum ferritin estimations are unreliable for evaluating iron status in patients with significant iron overload from chronic transfusions, particularly without iron chelation.
• Understanding limitations in iron metabolism is crucial for accurate iron status assessment.
• Optimizing iron chelation therapy, including adherence and timely initiation, is essential for managing iron overload.