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Serum transferrin receptor and erythropoiesis in children with newly diagnosed acute lymphoblastic leukemia
S M Kivivuori1, L Viinikka, A M Teppo
1Children's Hospital, Research Laboratory, Children's Hospital, University of Helsinki, Finland.
Insights
Transferrin receptor (TfR) levels in children with acute lymphoblastic leukemia correlate with erythropoiesis rates during chemotherapy. TfR concentration changes reflect red blood cell production, not erythropoietin levels.
Area of Science:
- Pediatric Oncology
- Hematology
- Biochemistry
Background:
- Acute lymphoblastic leukemia (ALL) is a common childhood cancer.
- Chemotherapy for ALL can impact red blood cell production.
- Transferrin receptor (TfR) is involved in iron uptake for erythropoiesis.
Purpose of the Study:
- To investigate the relationship between transferrin receptor (TfR) levels and erythropoiesis in children undergoing chemotherapy for ALL.
- To determine if TfR levels correlate with erythropoietin and reticulocyte counts.
Main Methods:
- Weekly monitoring of 35 children with ALL during the first 12 weeks of chemotherapy.
- Measurement of serum transferrin receptor (TfR) concentration.
- Assessment of reticulocyte counts, serum erythropoietin, and ferritin levels.
Main Results:
- Transferrin receptor (TfR) levels at diagnosis were 2.8 +/- 0.2 mg/l, decreasing by 3 weeks and peaking at 8 weeks.
- Reticulocyte counts followed a similar pattern to TfR levels.
- Serum erythropoietin and ferritin levels were generally elevated.
- Higher TfR concentrations were observed in patients with accelerated erythropoiesis.
Conclusions:
- Transferrin receptor (TfR) levels serve as a reliable indicator of erythropoiesis rate in children with ALL undergoing chemotherapy.
- TfR levels appear to be independent of serum erythropoietin concentrations in this patient group.
Abstract:
Thirty-five children with acute lymphoblastic leukemia were monitored weekly during the first 12 weeks of chemotherapy. The transferrin receptor (TfR) concentration was 2.8 +/- 0.2 mg/l (mean +/- S.E.M.) at diagnosis, decreased up to 3 weeks, and then increased reaching a maximal level at 8 weeks. The mean values for reticulocyte counts followed a similar pattern. In contrast, serum erythropoietin and ferritin levels were generally high. Those patients whose erythropoiesis was more accelerated had higher serum TfR concentrations. We conclude that among these patients the TfR level reflected the rate of erythropoiesis and was independent of the level of erythropoietin.