ABI-007 in Taxol Resistant Patients With Metastatic Breast Cancer
Information source: Abraxis BioScience Inc.
Information obtained from ClinicalTrials.gov on June 20, 2008
Link to the current ClinicalTrials.gov record.
Condition(s) targeted: Breast Neoplasms; Metastases, Neoplasm
Intervention: ABI-007 (Drug)
Phase: Phase 2
Sponsored by: Abraxis BioScience Inc.
Official(s) and/or principal investigator(s):
Michael J Hawkins, M.D., Study Director, Affiliation: Abraxis BioScience Inc.
The anticancer agent paclitaxel (marketed as Taxol) has shown remarkable activity against
metastatic breast cancer. However, the Taxol formulation requires prolonged administration
times, and there are safety problems that have been attributed to the solvent rather than the
active ingredient, paclitaxel. This is a new formulation of paclitaxel that has been found
to have fewer safety problems than Taxol, and may be administered safely at higher doses.
This study will investigate the safety and efficacy of this new formulation of paclitaxel
given intravenously once a week for three weeks, followed by a rest week. This cycle will be
repeated until safety problems or treatment failure require that the patient stop therapy.
Official title: A Phase II Clinical Trial of ABI-007 (A Cremophor-Free, Protein Stabilized, Nanoparticle Paclitaxel)Administered Weekly in Taxol Resistant Patients With Metastatic Breast Cancer
Study design: Treatment, Non-Randomized, Open Label, Uncontrolled, Single Group Assignment, Safety/Efficacy Study
The anticancer agent paclitaxel (Taxol for Injection Concentrate, Bristol-Meyers Squibb) has
a broad spectrum of activity against several human cancers including carcinomas of ovary,
breast, lung, esophagus and head and neck cancer. Taxol has shown remarkable activity
against metastatic breast cancer, yielding response rates in the range of 40% to 60% in
chemotherapy-naive patients and 25%-30% in patients refractory to anthracycline-containing
regimens (Taxol package insert). The major limitation of Taxol is its poor water soluability
requiring Cremophor (containing castor oil and ethanol) as a solvent. Taxol in this vehicle
must be administered over 3-24 hours, and hypersensitivity reactions to Cremophor require a
premedication routine of a corticosteroid, an antihistamine, and an H2 antagonist.
In this study, the test medication (ABI-007) is a nanoparticle colloidal composition of
protein-stabilized paclitaxel that is reconstituted in saline. The infusion time for ABI-007
is minimal compared to Taxol (under an hour), and there is no premedication required. The
maximally tolerated dose of this formulation of paclitaxel is 300 mg/m2, as compared to 175
mg/m2 for Taxol. As tumor response has been shown to be dose-dependent for paclitaxel, a
higher dose allows for a potentially better response.
This open-label, Phase II study will determine the safety, tolerability and anti-tumor effect
of ABI-007 monotherapy administered weekly in patients with metastatic breast cancer that
have been previously treated with Taxol.
Minimum age: 18 Years.
Maximum age: N/A.
Patients must be:
- If female, non-pregnant and not lactating, with a negative serum pregnancy test, and
either not of child-bearing potential or practicing an approved contraception method
- Eighteen years of age or older
- Karnofsky Perfomance Status of 70% or 0-2 SWOG Performance Status
- No other malignancy, except non-melanoma skin cancer, CIN, or in-situ cervical cancer
- Measurable disease
- Suitable candidate for treatment with paclitaxel
- Previously treated with Taxol weekly or every three weeks, including adjuvant therapy,
for metastatic breast cancer and relapsed within 12 months
- If, at baseline, patient has absolute neutrophil count of at least 1500 cells/mm3,
platelet count of at least 100,000 cells/mm3,and hemoglobin of at least 9 g/dL
- If, at baseline, patient has AST and ALT of less than or equal to 2. 5 x the upper
limit of normal range; a total bilirubin less than or equal to 1. 5 mg/dL; creatinine
levels less than or equal to 2 mg/dL; and alkaline phosphatase levels less than or
equal to 5 x the upper limit of normal range (unless there are bone but not liver
- Patient has an expected survival of at least 12 weeks
- Patient or his/her representative has signed an informed consent statement
Locations and Contacts
Abraxis BioScience, Inc., Raleigh, North Carolina 27609, United States
Starting date: June 2001
Last updated: July 18, 2007