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Topotecan in combination with radiotherapy in unresectable glioblastoma: a phase 2 study

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Abstract

Improving glioblastoma multiforme (GBM) treatment with radio-chemotherapy remains a challenge. Topotecan is an attractive option as it exhibits growth inhibition of human glioma as well as brain penetration. The present study assessed the combination of radiotherapy (60 Gy/30 fractions/40 days) and topotecan (0.9 mg/m2/day on days 1–5 on weeks 1, 3 and 5) in 50 adults with histologically proven and untreated GBM. The incidence of non-hematological toxicities was low and grade 3–4 hematological toxicities were reported in 20 patients (mainly lymphopenia and neutropenia). Partial response and stabilization rates were 2% and 32%, respectively, with an overall time to progression of 12 weeks. One-year overall survival (OS) rate was 42%, with a median OS of 40 weeks. Topotecan in combination with radiotherapy was well tolerated. However, while response and stabilization concerned one-third of the patients, the study did not show increased benefits in terms of survival in patients with unresectable GBM.

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Acknowledgments

The authors are grateful to GlaxoSmithKline, Marly-Le-Roi, France, for providing the Topotecan and for logistic assistance, and to Biotrial, Rennes, France, for their contribution to the realization of the study. The authors wish to thank Hervé Bismut who provided editorial assistance in the preparation of the manuscript

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Correspondence to Thierry Lesimple.

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Lesimple, T., Riffaud, L., Frappaz, D. et al. Topotecan in combination with radiotherapy in unresectable glioblastoma: a phase 2 study. J Neurooncol 93, 253–260 (2009). https://doi.org/10.1007/s11060-008-9774-3

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  • DOI: https://doi.org/10.1007/s11060-008-9774-3

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