Abstract:
BACKGROUND:9-Aminocamptothecin (9AC) and its parent compound, camptothecin, have shown outstanding preclinical activity against colorectal carcinoma. Irinotecan (CPT-11), another camptothecin derivative, has demonstrated clinical activity in patients with 5-fluorouracil (5-FU)-refractory colorectal carcinoma. METHODS:The authors performed a Phase II trial of 9AC involving patients with measurable metastatic colorectal carcinoma who had progressed through only one prior regimen of 5-FU-based chemotherapy. 9AC was given initially at a dose of 59 microg/m2/hour by continuous intravenous infusion for 72 hours, with treatments repeated every 14 days. Granulocyte-colony stimulating factor was given on Days 5-12. RESULTS:Sixteen patients were treated on this trial. Fourteen were evaluable for response. Contrary to expectations, no major objective antitumor responses were observed. Eight patients experienced stable disease for a median of 4.1 months (range, 2.2-9.5 months). Toxicities, especially myelosuppression, were severe and necessitated a 15% reduction in the initial dose after the first 9 patients. Toxicities at this reduced dose remained unacceptable. CONCLUSIONS:9AC did not demonstrate substantial activity against 5-FU-refractory colorectal carcinoma on the schedule studied. Toxicities at the doses and schedule studied were unacceptable in this patient population. Based on their results, the authors consider it unlikely that 9AC administered as a 72-hour continuous intravenous infusion will play a major role in the treatment of colorectal carcinoma.
journal_name
Cancerjournal_title
Cancerauthors
Saltz LB,Kemeny NE,Tong W,Harrison J,Berkery R,Kelsen DPdoi
10.1002/(sici)1097-0142(19971101)80:9<1727::aid-cnsubject
Has Abstractpub_date
1997-11-01 00:00:00pages
1727-32issue
9eissn
0008-543Xissn
1097-0142pii
10.1002/(SICI)1097-0142(19971101)80:9<1727::AID-CNjournal_volume
80pub_type
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