Abstract:
:The dose-limiting toxicities of the DNA topoisomerase I inhibitor topotecan are hematological. We prospectively analyzed the platelet toxicity pattern in patients receiving topotecan to optimize the clinical management of topotecan hematotoxicity. Twenty-one advanced ovarian cancer patients, all pretreated with cisplatin and paclitaxel, were treated with 1.25 mg/m2/day topotecan as a 30 min infusion for 5 days, every 3 weeks. No prophylactic granulocyte colony stimulating factor (G-CSF) was given. No topotecan dose reduction was planned according to hematologic toxicity. One hundred and thirty-three topotecan courses were administered (median per patient 6; range: 1-15). Despite no dose reduction, the mean platelet nadir values were significantly less pronounced at cycle 2 than at cycle 1 (82 versus 46 x 10(3)/mm3, p=0.0007). Similar differences were found between cycle 1 and any following cycle. The percent of patients experiencing grade 4 thrombocytopenia decreased from 43% at the first cycle, to 15 and 19% at the second and third courses, respectively (p=0.058). We conclude that the currently recommended topotecan schedule is feasible in heavily pretreated ovarian cancer patients without prophylactic G-CSF. The severity of topotecan-induced thrombocytopenia is maximal at the first cycle but significantly decreases from the second cycle in the absence of dose reduction.
journal_name
Anticancer Drugsjournal_title
Anti-cancer drugsauthors
Goldwasser F,Buthaud X,Gross M,Bleuzen P,Cvitkovic E,Voinea A,Jasmin C,Romain D,Misset JLdoi
10.1097/00001813-199903000-00002subject
Has Abstractpub_date
1999-03-01 00:00:00pages
263-5issue
3eissn
0959-4973issn
1473-5741journal_volume
10pub_type
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journal_title:Anti-cancer drugs
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