Copper, zinc, and iron in normal and leukemic lymphocytes from children

Area of Science:

• Biochemistry
• Immunology
• Pediatric Oncology

Background:

• Trace minerals like copper, zinc, and iron play crucial roles in cellular processes, including immune cell development and function.
• Alterations in mineral metabolism are increasingly recognized in various cancers, but their specific role in pediatric acute lymphocytic leukemia (ALL) requires further elucidation.

Purpose of the Study:

• To quantify and compare serum and cellular concentrations of copper, zinc, and iron in children with and without acute lymphocytic leukemia (ALL).
• To investigate the correlations between these minerals within serum and lymphocytes of healthy children and those with ALL.
• To explore the potential relationship between mineral concentrations and immune status in pediatric ALL.

Main Methods:

• Serum and peripheral blood lymphoid cells were collected from healthy children and children diagnosed with acute lymphocytic leukemia (ALL).
• Atomic absorption spectrophotometry or similar techniques were used to quantitate copper, zinc, and iron concentrations.
• Statistical analyses were performed to compare mineral levels, assess correlations, and identify differences based on clinical and demographic factors.

Main Results:

• Leukemic patients exhibited significantly higher serum and cellular copper and iron levels, and significantly lower cellular zinc levels compared to healthy controls.
• All three minerals showed higher concentrations in T-cell enriched lymphocyte preparations.
• Significant positive correlations were observed between copper and iron, and copper and zinc in lymphocytes, but not in serum. No significant differences were found related to ethnicity, age, sex, leukemia type, or cell count.

Conclusions:

• Pediatric acute lymphocytic leukemia (ALL) is associated with distinct alterations in copper, zinc, and iron metabolism in both serum and lymphoid cells.
• These mineral changes, particularly in T-cells, may be linked to the altered immune function observed in hematologic cancers.
• The findings provide a basis for further research into the role of these trace metals in lymphocyte maturation, immune regulation, and as potential biomarkers or therapeutic targets in pediatric ALL.