Activity of 9-nitro-camptothecin, an oral topoisomerase I inhibitor, in myelodysplastic syndrome and chronic myelomonocytic leukemia.

Abstract:

BACKGROUND:Topoisomerase I inhibitors, like topotecan, have activity in myelodysplastic syndrome (MDS) and chronic myelomonocytic leukemia (CMML). 9-Nitro-camptothecin (9-NC) is a new oral topoisomerase inhibitor with a good safety profile. The aims of the current study were to evaluate the activity and safety of 9-NC in MDS and CMML. METHODS:Adults with a diagnosis of MDS (n = 12) and CMML (n = 32) received 9-NC 2 mg/m(2) orally daily 5 days a week, every 4 to 6 weeks. RESULTS:Overall, 5 (11%) patients achieved complete response (CR), 7 (16%) had a partial response (PR), and 6 (14%) had hematologic improvement (HI), for an overall response rate of 41%. The response rate was similar in MDS and CMML. Severe (Grade 3-4) side effects included nausea and vomiting (7%), diarrhea (18%), other gastrointestinal toxicities (5%), and genitourinary toxicities (12%). CONCLUSIONS:9-NC is active in MDS and CMML. The paucity of available therapies in CMML makes 9-NC a good candidate for further studies as a single agent, or in combination with decitabine, 5-azacitidine or cytarabine.

journal_name

Cancer

journal_title

Cancer

authors

Quintas-Cardama A,Kantarjian H,O'Brien S,Jabbour E,Giles F,Ravandi F,Faderl S,Pierce S,Shan J,Verstovsek S,Cortes J

doi

10.1002/cncr.22186

subject

Has Abstract

pub_date

2006-10-01 00:00:00

pages

1525-9

issue

7

eissn

0008-543X

issn

1097-0142

journal_volume

107

pub_type

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