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Interferon alfa-2b in the treatment of chronic myelogenous leukemia
Abstract:
Thirty-six patients with Philadelphia chromosome-positive CML were treated with interferon alfa-2b for at least 3 months. Thirty-two of the patients had chronic phase disease and four had acute phase disease, one in blast crisis. Patients initially received a daily dose of 4 megaunits/m2 administered subcutaneously; outpatient self administration followed at a dosage decreased in accordance with serially determined blood cell counts. Treatment was continued for 0.5 to 15 months, with a median duration of 7 months. No complete remission was achieved, but hematologic remission occurred in 21 (58%) patients, with partial hematologic remission in an additional 12 (33%). All four patients with acute phase disease failed to respond. Adverse reactions were only significant during the first days of treatment and did not interfere with self administration of the drug. Interferon alfa-2b may prove to be an important alternative therapeutic modality in chronic phase CML.
Insights
Interferon alfa-2b showed promise for chronic phase chronic myeloid leukemia (CML), inducing hematologic remission in 58% of patients. However, it was ineffective in acute phase CML patients.
Area of Science:
- Hematology
- Oncology
- Pharmacology
Background:
- Chronic myeloid leukemia (CML) is a myeloproliferative neoplasm.
- Philadelphia chromosome-positive (Ph+) CML accounts for the majority of cases.
- Novel therapeutic strategies are continually sought for CML management.
Purpose of the Study:
- To evaluate the efficacy and tolerability of interferon alfa-2b in patients with Philadelphia chromosome-positive chronic myeloid leukemia (CML).
Main Methods:
- Thirty-six patients with Ph+ CML (32 chronic phase, 4 acute phase) received subcutaneous interferon alfa-2b.
- Initial dose was 4 megaunits/m2 daily, with subsequent dose adjustments based on blood counts.
- Treatment duration ranged from 0.5 to 15 months (median 7 months).
Main Results:
- Hematologic remission was achieved in 21 patients (58%), with partial hematologic remission in 12 (33%).
- No complete remission was observed.
- All four patients with acute phase CML did not respond to treatment.
- Adverse reactions were transient and did not impede self-administration.
Conclusions:
- Interferon alfa-2b demonstrated significant hematologic response rates in chronic phase Ph+ CML.
- The drug was ineffective in acute phase CML.
- Interferon alfa-2b may represent a viable alternative treatment for chronic phase CML.
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