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- Björkholm, Magnus, et al.
(författare)
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Success Story of Targeted Therapy in Chronic Myeloid Leukemia : A Population-Based Study of Patients Diagnosed in Sweden From 1973 to 2008
- 2011
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Ingår i: Journal of Clinical Oncology. - 0732-183X .- 1527-7755. ; 29:18, s. 2514-2520
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Tidskriftsartikel (refereegranskat)abstract
- Purpose Chronic myeloid leukemia (CML) management changed dramatically with the development of imatinib mesylate (IM), the first tyrosine kinase inhibitor targeting the BCR-ABL1 oncoprotein. In Sweden, the drug was approved in November 2001. We report relative survival (RS) of patients with CML diagnosed during a 36-year period. Patients and Methods Using data from the population-based Swedish Cancer Registry and population life tables, we estimated RS for all patients diagnosed with CML from 1973 to 2008 (n = 3,173; 1,796 males and 1,377 females; median age, 62 years). Patients were categorized into five age groups and five calendar periods, the last being 2001 to 2008. Information on use of upfront IM was collected from the Swedish CML registry. Results Relative survival improved with each calendar period, with the greatest improvement between 1994-2000 and 2001-2008. Five-year cumulative relative survival ratios (95% CIs) were 0.21 (0.17 to 0.24) for patients diagnosed 1973-1979, 0.54 (0.50 to 0.58) for 1994-2000, and 0.80 (0.75 to 0.83) for 2001-2008. This improvement was confined to patients younger than 79 years of age. Five-year RSRs for patients diagnosed from 2001 to 2008 were 0.91 (95% CI, 0.85 to 0.94) and 0.25 (95% CI, 0.10 to 0.47) for patients younger than 50 and older than 79 years, respectively. Men had inferior outcome. Upfront overall use of IM increased from 40% (2002) to 84% (2006). Only 18% of patients older than 80 years of age received IM as first-line therapy. Conclusion This large population-based study shows a major improvement in outcome of patients with CML up to 79 years of age diagnosed from 2001 to 2008, mainly caused by an increasing use of IM. The elderly still have poorer outcome, partly because of a limited use of IM.
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| 4. |
- Simonsson, Bengt, et al.
(författare)
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Combination of pegylated IFN-alpha 2b with imatinib increases molecular response rates in patients with low- or intermediate-risk chronic myeloid leukemia
- 2011
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Ingår i: Blood. - Washington D.C. : American Society of Hematology. - 0006-4971 .- 1528-0020. ; 118:12, s. 3228-3235
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Tidskriftsartikel (refereegranskat)abstract
- Biologic and clinical observations suggest that combining imatinib with IFN-alpha may improve treatment outcome in chronic myeloid leukemia (CML). We randomized newly diagnosed chronic-phase CML patients with a low or intermediate Sokal risk score and in imatinib-induced complete hematologic remission either to receive a combination of pegylated IFN-alpha 2b (Peg-IFN-alpha 2b) 50 mu g weekly and imatinib 400 mg daily (n = 56) or to receive imatinib 400 mg daily monotherapy (n = 56). The primary endpoint was the major molecular response (MMR) rate at 12 months after randomization. In both arms, 4 patients (7%) discontinued imatinib treatment (1 because of blastic transformation in imatinib arm). In addition, in the combination arm, 34 patients (61%) discontinued Peg-IFN-alpha 2b, most because of toxicity. The MMR rate at 12 months was significantly higher in the imatinib plus Peg-IFN-alpha 2b arm (82%) compared with the imatinib monotherapy arm (54%; intention-to-treat, P = .002). The MMR rate increased with the duration of Peg-IFN-alpha 2b treatment (andlt; 12-week MMR rate 67%, andgt; 12-week MMR rate 91%). Thus, the addition of even relatively short periods of Peg-IFN-alpha 2b to imatinib markedly increased the MMR rate at 12 months of therapy. Lower doses of Peg-IFN-alpha 2b may enhance tolerability while retaining efficacy and could be considered in future protocols with curative intent.
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