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Comparison of Liposome Entrapped Paclitaxel Easy to Use (LEP-ETU) and Taxol® Pharmacokinetics in Patients With Advanced Cancer

This study has been completed.
Information provided by:
INSYS Therapeutics Inc Identifier:
First received: December 23, 2004
Last updated: June 30, 2011
Last verified: June 2011

In this study, Liposome Entrapped Paclitaxel Easy to Use (LEP-ETU) is being compared to Taxol® to examine whether the paclitaxel in these 2 formulations undergoes similar processing by the body. Safety and tolerability of LEP-ETU and Taxol will also be assessed. In this study, each patient will receive one intravenous infusion of LEP-ETU or Taxol, followed 3 weeks later by an infusion of the other drug, at the same dose and infusion duration. Multiple blood samples will be taken for analysis before, during, and after both drug infusions. Upon completing these 2 Cycles of treatment, eligible patients may enroll in an extension study (LEP-ETU-102B) to continue treatment with LEP-ETU.

LEP-ETU is a liposomal formulation of paclitaxel, a widely used anti-cancer drug. This LEP-ETU formulation of paclitaxel is being developed to potentially reduce toxicities associated with Taxol, by eliminating the drug formulation component polyoxyethylated castor oil (Cremophor® EL). In LEP-ETU, paclitaxel is associated with liposomes, which are microscopic membrane-like structures created from lipids (fats). Thus, the LEP-ETU formulation could potentially have reduced toxicity, while maintaining or enhancing efficacy.

Condition Intervention Phase
Drug: Liposome Entrapped Paclitaxel Easy to Use (LEP-ETU)
Drug: Paclitaxel for injection (Taxol)
Phase 1

Study Type: Interventional
Study Design: Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: Open Label
Primary Purpose: Treatment
Official Title: A Randomized Two-Period Crossover, Clinical Bioequivalence Study Comparing the Pharmacokinetics of Liposome Entrapped Paclitaxel Easy to Use (LEP-ETU) Formulation Versus Taxol® in Patients With Advanced Cancer

Resource links provided by NLM:

Further study details as provided by INSYS Therapeutics Inc:

Primary Outcome Measures:
  • To determine whether LEP-ETU and Taxol are bioequivalent.

Secondary Outcome Measures:
  • To evaluate the pharmacokinetics of paclitaxel and major metabolites in plasma
  • To assess the safety and tolerability of paclitaxel following intravenous administration of LEP-ETU and Taxol.

Estimated Enrollment: 48
Study Start Date: November 2004
Study Completion Date: June 2010
Primary Completion Date: November 2006 (Final data collection date for primary outcome measure)
Detailed Description:
This Phase 1B, open-label, two-period crossover bioequivalence study is designed to compare the pharmacokinetics (PK) of LEP-ETU and Taxol in patients with advanced cancer. Patients are randomized to determine which drug is administered first. A single dose of LEP-ETU or Taxol (Cycle A) will be administered, followed 3 weeks later by a single dose of the other drug (Cycle B). Blood samples for PK analysis will be taken before, during, and after the infusion of each drug. Following successful completion of both Cycles in this study, patients may be eligible for additional cycles of treatment with LEP-ETU in the LEP-ETU-102B extension study.

Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Patients must have advanced histologically diagnosed non-hematological malignancy for which there is no curative therapy and for which treatment with single agent paclitaxel is appropriate in the opinion of the investigator.
  • Patients must have a life expectancy of 12 weeks or more.
  • Patients must have an ECOG Performance Status of 0-2.
  • Patients must have recovered from acute toxicities of prior treatment. Specifically: *4 or more weeks must have elapsed since receiving any investigational agent. *3 or more weeks must have elapsed since receiving any radiotherapy, or treatment with cytotoxic or biologic agents (6 weeks or more for mitomycin or nitrosureas). Chronic treatment with non-investigational gonadotropin-releasing hormone analogs or other hormonal or supportive care is permitted. *2 or more weeks must have elapsed since any prior surgery or granulocyte-stimulating growth factor therapy.

    • Patients must be in adequate condition as evidenced by the following clinical laboratory values: *Absolute neutrophil count (ANC) ≥1,500/mm³, *Platelet count ≥100,000/mm³, *Hemoglobin ≥9.0 g/dL, *Albumin ≥3.0 g/dl, *Serum creatinine ≥2.0 mg/dL, *Total bilirubin 1.5 x the institutional upper limit of normal (ULN) or greater. *Alanine aminotransferase (ALT) and aspartate aminotransferase (AST) ≤2.5 x ULN. In the case of known liver metastasis, ALT and AST ≤5 x ULN. *Alkaline phosphatase (ALP) ≤2.5 x ULN. No ULN applies to alkaline phosphatase in the case of known bone metastasis.
    • Patients (male and female) must be willing to practice an effective method of birth control during the study.
    • Patients must be available for and able to comply with the study-specific blood sampling requirements for pharmacokinetic evaluations.
    • Patients or legal representative must understand the investigational nature of this study and sign an Institutional Review Board (IRB) approved written informed consent form prior to treatment.

Exclusion Criteria:

  • Active uncontrolled bleeding or bleeding diathesis (e.g., active peptic ulcer disease).
  • Any active infection requiring parenteral or oral antibiotic treatment; any use of trimethoprim, including use for antimicrobial prophylaxis.
  • Known infection with human immunodeficiency virus (HIV) or hepatitis virus.
  • Active heart disease including myocardial infarction or congestive heart failure within the previous 6 months, symptomatic coronary artery disease, or arrhythmias currently requiring medication.
  • Known or suspected active central nervous system metastasis. (Patients stable 8 weeks after completion of treatment for central nervous system metastasis are eligible.)
  • Impending or symptomatic spinal cord compression or carcinomatous meningitis.
  • Having pre-existing clinically significant neuropathy (National Cancer Institute Common Terminology Criteria for Adverse Events (NCI CTCAE) greater than or equal to Grade 2 neuromotor or Grade 2 neurosensory) except for abnormalities due to cancer.
  • Having known hypersensitivity to paclitaxel or liposomes.
  • Receiving any agent that could interfere with LEP-ETU metabolism, including CYP3A4 inducers and inhibitors within 3 weeks prior to, or while receiving, study drug (Please refer to for a list of such agents).
  • Requiring immediate palliative treatment of any kind including surgery and/or radiotherapy.
  • Female patients who are pregnant or breast feeding.
  • Unwilling or unable to follow protocol requirements.
  • Any condition which, in the Investigator's opinion, deems the patient an unsuitable candidate to receive study drug.
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Please refer to this study by its identifier: NCT00100139

United States, New Jersey
Cancer Institute of New Jersey - University of Medicine and Dentistry of New Jersey
New Brunswick, New Jersey, United States, 08903
Universitatsklinikum Essen
Essen, Germany
Allgemeines Krankenhaus St. Georg
Hamburg, Germany
Academisch Medisch Centrum
Amsterdam, Netherlands
Catharina ziekenhuis
EIndhoven, Netherlands
Leids Universitair Medisch Centrum
Leiden, Netherlands
Sponsors and Collaborators
INSYS Therapeutics Inc
  More Information Identifier: NCT00100139     History of Changes
Other Study ID Numbers: LEP-ETU-102A
Study First Received: December 23, 2004
Last Updated: June 30, 2011

Keywords provided by INSYS Therapeutics Inc:
Advanced neoplasm
Advanced cancer
Refractory cancer
Metastatic cancer

Additional relevant MeSH terms:
Albumin-Bound Paclitaxel
Antineoplastic Agents, Phytogenic
Antineoplastic Agents
Tubulin Modulators
Antimitotic Agents
Mitosis Modulators
Molecular Mechanisms of Pharmacological Action processed this record on April 28, 2017