Celator(R) Pharmaceuticals Presents Phase 1 Results With CPX-351 in Patients With Advanced Leukemia at the American Society of Hematolo...( Findings confirm advantages of fixed-...),Health

Findings confirm advantages of fixed-ratio drug delivery and lay the groundwork for Phase 2 trials already underway in first-line and first-relapse Acute Myeloid Leukemia (AML) settings

PRINCETON, N.J., Dec. 9 /PRNewswire/ -- Celator Pharmaceuticals today announced that a Phase 1 dose escalating study of CPX-351 (cytarabine:daunorubicin) Liposome Injection established the recommended dose for Phase 2 studies and confirmed preliminary observations of safety, enhanced pharmacokinetics and promising anti-tumor activity in patients with advanced leukemia. A final analysis of the Phase 1 data (abstract #2984) and supportive findings from a pre-clinical pharmacodynamic model (abstract #942) were presented at the 50th American Society of Hematology (ASH) Annual Meeting in San Francisco.

"In the Phase 1 trial, CPX-351 had a tolerability profile that appears better than conventional cytarabine/daunorubicin treatment and produced impressive anti-leukemic responses, including complete remissions (CRs) at and below the maximum tolerated dose, in relapsed and refractory patients," said Eric J. Feldman, MD, of the Weill Medical College of Cornell University and New York-Presbyterian Hospital, the principal investigator in the study. "These encouraging results suggest that CPX-351 may offer advantages to conventional administration of these commonly used drugs. We are excited to participate in the two Phase 2 studies."

In the study, complete remissions were observed in 11 of 47 patients, including 10 patients (9 CRs and 1 CRp - complete remission without full platelet recovery) of 44 with AML and 1 patient of 3 with acute lymphocytic leukemia (ALL) following treatment with CPX-351. Of the 10 AML CRs, 7 occurred at the two highest dose levels, although complete remissions were achieved at dose levels as little as one third of the maximum tolerated dose (MTD). Of note, 7 CRs were achieved in 22 patient
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