M-ficolin in children with cancer

Area of Science:

• Immunology
• Hematology
• Pediatric Oncology

Background:

• M-ficolin (ficolin-1) is a complement-activating pattern-recognition molecule produced by monocytes and neutrophils.
• Its precise biological role, particularly in the context of pediatric cancer, remains largely uncharacterized.
• Understanding M-ficolin's function could offer insights into immune responses and infection risk in these patients.

Purpose of the Study:

• To assess M-ficolin serum concentrations in pediatric cancer patients.
• To explore associations between M-ficolin levels and clinical/hematological parameters.
• To investigate the relationship between M-ficolin concentrations and chemotherapy-related infection risk.

Main Methods:

• M-ficolin was quantified using a time-resolved immunofluorometric assay in serum samples from 94 children at cancer diagnosis.
• Serum M-ficolin levels were correlated with peripheral blood counts and bone marrow examination findings.
• Statistical analyses included Spearman correlation and multivariate Poisson regression.

Main Results:

• Median M-ficolin concentration in pediatric cancer patients was comparable to age-matched controls (1.6 μg/mL vs. 1.7 μg/mL).
• M-ficolin levels showed strong positive correlations with absolute neutrophil and monocyte counts in both peripheral blood and bone marrow.
• Low serum M-ficolin levels did not correlate with an increased incidence of fever during neutropenia in chemotherapy.

Conclusions:

• Serum M-ficolin concentration in pediatric cancer patients is significantly associated with neutrophil and monocyte counts.
• These findings indicate that serum M-ficolin levels may serve as a biomarker reflecting the size of the circulating phagocyte pool.
• M-ficolin's role in infection risk during chemotherapy in this population was not supported by this study.