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1.  A Phase I Study of the Safety and Pharmacokinetics of Trabectedin in Combination With Pegylated Liposomal Doxorubicin in Patients With Advanced Malignancies 
SUMMARY
Background
To determine the maximum tolerated dose (MTD), safety, potential pharmacokinetic (PK) interactions, and effect on liver histology of trabectedin in combination with pegylated liposomal doxorubicin (PLD) for advanced malignancies.
Patients and Methods
Entry criteria for the 36 patients included normal liver function, prior doxorubicin exposure <250 mg/m2, and normal cardiac function. A 1-hour PLD (30 mg/m2) infusion was followed immediately by 1 of 6 trabectedin doses (0.4, 0.6, 0.75, 0.9, 1.1, and 1.3 mg/m2) infused over 3 hours, repeated every 21 days until evidence of complete response (CR), disease progression, or unacceptable txicity. Plasma samples were obtained to assess PK profiles.
Results
The MTD of trabectedin was 1.1 mg/m2. Drug-related grade 3 and 4 toxicities were neutropenia (31%) and elevated transaminases (31%). Six patients responded (1 CR, 5 partial responses), with an overall response rate of 16.7%, and 14 had stable disease >4 months (39%). Neither drug had its PK affected significantly by concomitant administration compared to trabectedin and PLD each given as a single agent.
Conclusion
Trabectedin combined with PLD is generally well tolerated at therapeutic doses of both drugs in pretreated patients with diverse tumor types, and appears to provide clinical benefit. These results support the need for additional studies of this combination in appropriate cancer types.
doi:10.1093/annonc/mdn363
PMCID: PMC2598415  PMID: 18497430
trabectedin; ET-743; pegylated liposomal doxorubicin (PLD); sarcomas; ovarian cancer

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