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Reticulocyte parameters and hemoglobin F production in sickle cell disease patients undergoing hydroxyurea therapy.
J Clin Lab Anal 2003; 17(2):66-72JC

Abstract

Hemoglobin F (HbF) is an effective inhibitor of HbS polymerization. Hydroxyurea (HU) is used to increase HbF synthesis and improve the clinical course of sickle cell disease (SCD) patients. We studied a series of laboratory parameters concerning HbF production and reticulocyte response, and compared data between two groups: 1) 13 SCD patients treated with HU, and 2) 33 untreated SCD patients. Higher values of Hb concentration, mean cell volume (MCV), mean cell hemoglobin (MCH), mean reticulocyte volume (MRV), HbF concentration, percentage of F-cells, and amount of HbF/F-cells were observed in the treated group of patients. There was no correlation between Hb and HbF elevations. The reticulocyte count, immature reticulocyte count, mean fluorescence index (MFI), and neutrophil count were significantly lower in treated patients. Taken together, these findings suggest that a decreased hemolytic process occurred in patients undergoing HU treatment. There was a significant correlation between MCV and HbF, between MRV and HbF, and between MRV and F-cell in patients taking HU. These data indicate that macroreticulocytes correspond to F-reticulocytes, and that an increase in MRV in SCD patients using HU may be an indirect signal of F-cell production. The concentration of HbF/F-cells was higher in patients treated with HU, but this increase apparently was independent of F-cell production. Reticulocyte (RTC) parameters, as assessed by hematological analyzers, may be useful for following erythropoietic changes in patients receiving HU, and can indirectly indicate HbF and F-cell production induced by HU therapy.

Authors+Show Affiliations

Department of Clinical Pathology, Hematology and Hemotherapy Center, State University of Campinas (UNICAMP), São Paulo, Brazil.No affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

12640630

Citation

Borba, R, et al. "Reticulocyte Parameters and Hemoglobin F Production in Sickle Cell Disease Patients Undergoing Hydroxyurea Therapy." Journal of Clinical Laboratory Analysis, vol. 17, no. 2, 2003, pp. 66-72.
Borba R, Lima CS, Grotto HZ. Reticulocyte parameters and hemoglobin F production in sickle cell disease patients undergoing hydroxyurea therapy. J Clin Lab Anal. 2003;17(2):66-72.
Borba, R., Lima, C. S., & Grotto, H. Z. (2003). Reticulocyte parameters and hemoglobin F production in sickle cell disease patients undergoing hydroxyurea therapy. Journal of Clinical Laboratory Analysis, 17(2), pp. 66-72.
Borba R, Lima CS, Grotto HZ. Reticulocyte Parameters and Hemoglobin F Production in Sickle Cell Disease Patients Undergoing Hydroxyurea Therapy. J Clin Lab Anal. 2003;17(2):66-72. PubMed PMID: 12640630.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Reticulocyte parameters and hemoglobin F production in sickle cell disease patients undergoing hydroxyurea therapy. AU - Borba,R, AU - Lima,C S P, AU - Grotto,H Z W, PY - 2003/3/18/pubmed PY - 2003/11/6/medline PY - 2003/3/18/entrez SP - 66 EP - 72 JF - Journal of clinical laboratory analysis JO - J. Clin. Lab. Anal. VL - 17 IS - 2 N2 - Hemoglobin F (HbF) is an effective inhibitor of HbS polymerization. Hydroxyurea (HU) is used to increase HbF synthesis and improve the clinical course of sickle cell disease (SCD) patients. We studied a series of laboratory parameters concerning HbF production and reticulocyte response, and compared data between two groups: 1) 13 SCD patients treated with HU, and 2) 33 untreated SCD patients. Higher values of Hb concentration, mean cell volume (MCV), mean cell hemoglobin (MCH), mean reticulocyte volume (MRV), HbF concentration, percentage of F-cells, and amount of HbF/F-cells were observed in the treated group of patients. There was no correlation between Hb and HbF elevations. The reticulocyte count, immature reticulocyte count, mean fluorescence index (MFI), and neutrophil count were significantly lower in treated patients. Taken together, these findings suggest that a decreased hemolytic process occurred in patients undergoing HU treatment. There was a significant correlation between MCV and HbF, between MRV and HbF, and between MRV and F-cell in patients taking HU. These data indicate that macroreticulocytes correspond to F-reticulocytes, and that an increase in MRV in SCD patients using HU may be an indirect signal of F-cell production. The concentration of HbF/F-cells was higher in patients treated with HU, but this increase apparently was independent of F-cell production. Reticulocyte (RTC) parameters, as assessed by hematological analyzers, may be useful for following erythropoietic changes in patients receiving HU, and can indirectly indicate HbF and F-cell production induced by HU therapy. SN - 0887-8013 UR - https://www.unboundmedicine.com/medline/citation/12640630/Reticulocyte_parameters_and_hemoglobin_F_production_in_sickle_cell_disease_patients_undergoing_hydroxyurea_therapy_ L2 - https://doi.org/10.1002/jcla.10070 DB - PRIME DP - Unbound Medicine ER -