de Paula EV, Lima CSP, Arruda VR, Alberto FL, Saad STO, Costa FF. Long-term hydroxyurea therapy in beta-thalassaemia patients.
Eur J Haematol 2003;
70:151-5. [PMID:
12605659 DOI:
10.1034/j.1600-0609.2003.00037.x]
[Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
OBJECTIVE
The study aimed to investigate the use of hydroxyurea (HU) for the treatment of beta-thalassaemia (beta-thal) patients.
METHODS
We examined the haematological effects of orally administered HU (10-20 mg/kg/d) in 11 patients, including four beta-thal major and seven beta-thal intermedia patients. Complete blood count and levels of foetal haemoglobin (HbF), liver enzymes and serum creatinine were evaluated before and during HU. Response to therapy was evaluated at 6 months of treatment.
RESULTS
A substantial increase in haemoglobin (Hb) level (4.1 g/dL), leading to complete withdrawal from a regular transfusion programme, was observed in one unique beta-thal major patient. In the beta-thal intermedia patients, increases in Hb level of 1.3, 1.9 and 2.0 g/dL were observed in three of seven (42.9%) patients during HU therapy. The mean values of Hb, mean corpuscular haemoglobin (MCH), and HbF were higher during HU treatment than baseline values (8.7 vs. 7.7 g/dL, P = 0.05; 26.7 vs. 22.9 pg, P = 0.05; 57.2 vs. 44.9%, P = 0.04; respectively). In contrast, the mean reticulocyte count measured during therapy decreased (97.0 x 10(9) vs. 632.0 x 10(9)/L, P = 0.03). No correlations were observed between levels of Hb and HbF (r = 0.77, P = 0.10), and levels of Hb and reticulocyte counts (r = 0.26, P = 0.31). No significant toxicity was observed in our patients.
CONCLUSION
These results suggest that HU may improve Hb levels in beta-thal. Thus, we may conclude that a large trial concerning the response to HU in these patients should be carried out to clarify this issue.
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