Iron overload after allogeneic stem cell transplantation in children with acute lymphoblastic leukemia

Area of Science:

• Pediatric Hematology
• Transplantation Immunology
• Iron Metabolism

Background:

• Red blood cell transfusions are critical for leukemia treatment.
• Iron overload is a potential complication of frequent transfusions.
• Long-term effects on organ function and growth require investigation.

Purpose of the Study:

• To determine the prevalence of iron overload in pediatric patients post-allogeneic hematopoietic stem cell transplant (HSCT) for acute lymphoblastic leukemia (ALL).
• To assess the association between body iron load and organ function (liver, cardiac), insulin resistance, and growth.
• To recommend appropriate monitoring strategies for iron overload.

Main Methods:

• Study included 23 pediatric patients undergoing HSCT for ALL.
• Body iron load assessed via laboratory tests, hepatic and cardiac MRI, and transfusion history.
• Multivariate analysis used to correlate iron load with clinical parameters.

Main Results:

• 48% of patients showed hepatic iron overload; 4% had myocardial iron overload.
• Elevated alanine transaminase associated with transfused iron per time unit.
• No significant correlation found between iron load and growth or insulin resistance.
• Subclinical decrease in ejection fraction noted in 35% but not associated with iron status.

Conclusions:

• Iron overload is prevalent in pediatric patients after HSCT for ALL.
• Early organ dysfunction directly related to iron overload was not observed.
• Regular evaluation of iron load is advised during post-transplant follow-up.