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Drug Resistance Inhibition in Treating Women With Recurrent or Metastatic Breast Cancer

This study has been completed.
National Cancer Institute (NCI)
Information provided by:
Eastern Cooperative Oncology Group Identifier:
First received: November 1, 1999
Last updated: August 28, 2013
Last verified: August 2013

RATIONALE: Some tumors become resistant to chemotherapy drugs. Combining PSC 833 with a chemotherapy drug may reduce resistance to the drug, and allow the tumor cells to be killed.

PURPOSE: Phase II trial to study the effectiveness of PSC 883 and paclitaxel in treating women who have recurrent or metastatic breast cancer.

Condition Intervention Phase
Breast Cancer Drug: paclitaxel Drug: valspodar Phase 2

Study Type: Interventional
Study Design: Primary Purpose: Treatment

Resource links provided by NLM:

Further study details as provided by Eastern Cooperative Oncology Group:

Estimated Enrollment: 36
Study Start Date: June 1997
Primary Completion Date: November 2003 (Final data collection date for primary outcome measure)
Detailed Description:

OBJECTIVES: I. Evaluate the antitumor activity, as measured by frequency of objective response and time to progression, of the multidrug resistance modulator PSC 833 in combination with paclitaxel in women with recurrent or metastatic breast cancer. II. Describe the toxicity of this regimen.

OUTLINE: All patients receive PSC 833 by mouth every 6 hours for a total of 12 doses. Paclitaxel is infused over 3 hours, after the 5th dose of PSC 833. Treatment is repeated every 3 weeks in stable and responding patients. PSC 833 must not be mixed with grapefruit juice. Growth factors may be used at the discretion of the investigator. Patients are followed every 3 months for the first two years, then every 6 months for years 2-5, and then annually thereafter.

PROJECTED ACCRUAL: It is anticipated that approximately 36 patients will be entered over 24 months if there are at least 6 responses in the first 17 patients.


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

DISEASE CHARACTERISTICS: Histologically confirmed adenocarcinoma of the breast that is recurrent or metastatic No CNS metastases Bidimensionally measurable disease required Patients with bone sites only are not eligible Hormone receptor status: Not specified

PATIENT CHARACTERISTICS: Age: 18 and over Sex: Women only Menopausal status: Not specified Performance status: ECOG 0-2 Hematopoietic: Platelet count at least 100,000/mm3 Absolute granulocyte count at least 1,500/mm3 Hepatic: Bilirubin no greater than 1.5 mg/dL AST less than 2.5 times upper limit of normal Renal: Creatinine no greater than twice upper limit of normal Other: No allergy to cyclosporine or to drugs formulated with Cremophor (e.g., some anesthetics and muscle relaxants) No active unresolved infection More than 7 days since parenteral antibiotics No second malignancy within 5 years except: In situ cervical cancer Nonmelanomatous skin cancer No pregnant or nursing women Adequate contraception required of fertile women

PRIOR CONCURRENT THERAPY: Biologic therapy: Not specified Chemotherapy: Prior anthracyclines or medical contraindication to anthracycline therapy required No prior paclitaxel or taxotere No more than 1 prior regimen for metastatic or recurrent disease Adjuvant chemotherapy within 6 months of diagnosis of metastatic disease considered therapy for advanced disease At least 3 weeks since chemotherapy Endocrine therapy: At least 3 weeks since hormonal therapy for metastases Radiotherapy: Not specified Surgery: Not specified Other: No concurrent treatment with any of the following agents proven to affect blood levels of cyclosporine: Diltiazem Nicardipine Verapamil Fluconazole Itraconazole Ketoconazole Clarithromycin Erythromycin Methylprednisolone Prednisolone Allopurinol Bromocriptine Danazol Metoclopramide Nafcillin Rifampin Carbamazepine Phenobarbital Phenytoin Octreotide Ticlopidine

  Contacts and Locations
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Please refer to this study by its identifier: NCT00002826

United States, California
Veterans Affairs Medical Center - Palo Alto
Palo Alto, California, United States, 94304
Stanford University Medical Center
Stanford, California, United States, 94305-5408
United States, New Jersey
Hunterdon Regional Cancer Program
Flemington, New Jersey, United States, 08822
Kimball Medical Center
Lakewood, New Jersey, United States, 08701
Fox Chase Cancer Center at Virtua-Memorial Hospital Burlington County
Mount Holly, New Jersey, United States, 08060
Cancer Institute of New Jersey
New Brunswick, New Jersey, United States, 08901
St. Francis Medical Center
Trenton, New Jersey, United States, 08629
United States, New York
Albert Einstein Comprehensive Cancer Center
Bronx, New York, United States, 10461
United States, Pennsylvania
Fox Chase Cancer Center
Philadelphia, Pennsylvania, United States, 19111
Sponsors and Collaborators
Eastern Cooperative Oncology Group
National Cancer Institute (NCI)
Study Chair: Robert W. Carlson, MD Stanford University
  More Information

Carlson RW, O'Neill A, Goldstein L, et al.: A phase II trial of PSC-833 modulation of multidrug resistance to paclitaxel in breast cancer: a pilot trial of the Eastern Cooperative Oncology Group. [Abstract] Proceedings of the American Society of Clinical Oncology 21: A-234, 2002. Identifier: NCT00002826     History of Changes
Other Study ID Numbers: CDR0000065011
Study First Received: November 1, 1999
Last Updated: August 28, 2013

Keywords provided by Eastern Cooperative Oncology Group:
stage IV breast cancer
recurrent breast cancer

Additional relevant MeSH terms:
Breast Neoplasms
Neoplasms by Site
Breast Diseases
Skin Diseases
Albumin-Bound Paclitaxel
Antineoplastic Agents, Phytogenic
Antineoplastic Agents
Tubulin Modulators
Antimitotic Agents
Mitosis Modulators
Molecular Mechanisms of Pharmacological Action processed this record on June 23, 2017