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Ref Type | Journal Article | ||||||||||||
PMID | (24423921) | ||||||||||||
Authors | Hoh CK, Burris HA, Bendell JC, Tarazi J, Rosbrook B, Kim S, Infante JR, Reid TR | ||||||||||||
Title | Intermittent dosing of axitinib combined with chemotherapy is supported by (18)FLT-PET in gastrointestinal tumours. | ||||||||||||
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Abstract Text | We evaluated week-on/week-off axitinib dosing plus chemotherapy in patients with gastrointestinal tumours, including tumour thymidine uptake by fluorine-18 3'-deoxy-3'-fluorothymidine positron emission tomography ((18)FLT-PET).During a lead-in period, patients received twice daily (b.i.d.) axitinib 7 mg (n=3) or 10 mg (n=18) for 7 days followed by a 7-day dosing interruption; serial (18)FLT-PET scans were performed before day 1 and on days 7, 10, and 14. Axitinib plus FOLFIRI or FOLFOX was then administered in 2-week cycles; axitinib was interrupted on day 10 of each cycle for 7 days.The maximum tolerated dose of axitinib was 10 mg b.i.d., in a week-on/week-off schedule, combined with FOLFIRI or FOLFOX. Common all-causality grade 3 adverse events were neutropenia (38%), hypertension (33%), and fatigue (29%). Of 21 patients, 2 (10%) had a partial response and 12 (57%) had stable disease. Following 7 days of continuous axitinib dosing, tumour (18)FLT uptake decreased -49% from baseline and recovered to -28% and -17% from baseline, respectively, after 3 and 7 days of axitinib interruption.Axitinib administered in a week-on/week-off schedule combined with FOLFIRI or FOLFOX is supported by (18)FLT-PET data and was well tolerated in patients with gastrointestinal tumours. |
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