Suberoylanilide Hydroxamic Acid in Treating Patients With Progressive Stage IV Breast Cancer

Condition(s) targeted: Breast Cancer

Intervention: vorinostat (Drug); chemotherapy (Procedure); enzyme inhibitor therapy (Procedure)

Phase: Phase 2

Status: Completed

Sponsored by: California Cancer Consortium

Official(s) and/or principal investigator(s):
Thehang H. Luu, MD, Study Chair, Affiliation: Beckman Research Institute

RATIONALE: Drugs used in chemotherapy, such as suberoylanilide hydroxamic acid, work in different ways to stop the growth of tumor cells, either by killing the cells or by stopping them from dividing. Suberoylanilide hydroxamic acid may also stop the growth of tumor cells by blocking some of the enzymes needed for cell growth.

PURPOSE: This phase II trial is studying how well suberoylanilide hydroxamic acid works in treating patients with progressive stage IV breast cancer.

Official title: Phase II Study of Suberoylanilide Hydroxamic Acid (SAHA) (NSC 701852) as Salvage Therapy in Metastatic Breast Cancer

Study design: Treatment, Open Label

Primary outcome:

Disease-free survival at 6 months following study completion

Response rate at 6 months following study completion

Biologic end points at 6 months following study completion

Detailed description: OBJECTIVES:

Primary

- Determine the objective tumor response rate in patients with progressive stage IV

adenocarcinoma of the breast treated with suberoylanilide hydroxamic acid as salvage therapy.

Secondary

- Determine the time to progression and overall survival of patients treated with this

drug.

- Determine the toxicity profile of this drug in these patients.

OUTLINE: This is a multicenter study.

Patients receive oral suberoylanilide hydroxamic acid twice daily on days 1-14. Courses repeat every 21 days in the absence of disease progression or unacceptable toxicity.

After completion of study treatment, patients are followed for 8 weeks.

PROJECTED ACCRUAL: A total of 12-37 patients will be accrued for this study within 4-12 months.

Minimum age: 18 Years. Maximum age: N/A. Gender(s): Both.

Criteria:

DISEASE CHARACTERISTICS:

- Histologically or cytologically confirmed adenocarcinoma of the breast

- Stage IV disease

- Tumor blocks and/or slides from original diagnosis or metastatic disease work-up must

be available

- Progressive disease after 1 or 2 prior chemotherapy regimens for metastatic disease

- Chemotherapy regimen(s) may have included trastuzumab (Herceptin®) for

HER2/neu-positive disease

- Measurable disease, defined as ≥ 1 unidimensionally measurable lesion > 20 mm by

conventional techniques OR > 10 mm by spiral CT scan

- No known brain metastases unless they are controlled after prior therapy AND patient

has not been treated with steroids within the past 2 months

- Hormone receptor status:

- Not specified

PATIENT CHARACTERISTICS:

Age

- 18 and over

Sex

- Female or male

Menopausal status

- Not specified

Performance status

- ECOG 0-2

Life expectancy

- More than 6 months

Hematopoietic

- Absolute neutrophil count ≥ 1,000/mm^3

- Platelet count ≥ 100,000/mm^3

Hepatic

- Bilirubin ≤ 2 mg/dL

- AST and ALT ≤ 3 times upper limit of normal

Renal

- Creatinine ≤ 1. 6 mg/dL OR

- Creatinine clearance ≥ 60 mL/min

Cardiovascular

- No symptomatic congestive heart failure

- No unstable angina pectoris

- No cardiac arrhythmia

Other

- Not pregnant or nursing

- Negative pregnancy test

- Fertile patients must use effective contraception

- No history of allergic reaction attributed to compounds of similar chemical or

biological composition to study drug, including any of the following:

- Sodium butyrate

- Trichostatin A

- Trapoxin

- MS-27-275

- Depsipeptide

- No psychiatric illness or social situation that would preclude study compliance

- No ongoing or active infection

- No other uncontrolled illness

PRIOR CONCURRENT THERAPY:

Biologic therapy

- See Disease Characteristics

- No concurrent filgrastim (G-CSF) for chemotherapy-induced neutropenia

Chemotherapy

- See Disease Characteristics

- More than 4 weeks since prior chemotherapy (6 weeks for nitrosoureas or mitomycin)

Endocrine therapy

- See Disease Characteristics

- Prior hormonal therapy allowed

Radiotherapy

- More than 4 weeks since prior radiotherapy

Surgery

- Not specified

Other

- Recovered from all prior therapy

- Prior adjuvant therapy for metastatic disease allowed

- At least 2 weeks since prior valproic acid

- No other concurrent investigational agents

- No other concurrent anticancer therapy

- No concurrent combination antiretroviral therapy for HIV-positive patients

City of Hope Comprehensive Cancer Center, Duarte, California 91010-3000, United States

University of California Davis Cancer Center, Sacramento, California 95817, United States

USC/Norris Comprehensive Cancer Center and Hospital, Los Angeles, California 90089-9181, United States

Hillman Cancer Center at University of Pittsburgh Cancer Institute, Pittsburgh, Pennsylvania 15232, United States

Clinical trial summary from the National Cancer Institute's PDQ® database

Starting date: June 2005
Last updated: February 7, 2008