Capecitabine With Digoxin for Metastatic Breast Cancer

Phase 2

Terminated

Conditions: Metastatic Breast Cancer

Interventions: Drug: Capecitabine
Drug: Digoxin

Registration Number: NCT01887288

Lead Sponsor: Western Regional Medical Center

Brief Summary: To evaluate the Growth Modulation Index (GMI) of the combination of metronomic capecitabine with oral digoxin in metastatic breast cancer

Detailed Description: In this phase II study, the Investigators will combine metronomic capecitabine with digoxin to treat metastatic breast cancer patients who have progressed on both anthracyclines and taxanes. We hypothesize that the combination of digoxin with metronomic capecitabine may lead to increased efficacy and duration of treatment without progression with decreased side effects than standard regimen.

Recruitment & Eligibility

Status: TERMINATED

Sex: All

Target Recruitment: 16

Inclusion Criteria

Patients ≥ 18 years of age with histologically confirmed, metastatic breast cancer resistant to anthracyclines and taxanes
Anthracycline resistance is defined as tumor progression during treatment or within 3 months of last dose in the metastatic setting, or recurrence within 6 months in the neoadjuvant or adjuvant setting. Alternatively, a minimum cumulative dose of anthracycline of 240 mg/m^2 (doxorubicin) or 360 mg/m^2 (epirubicin) has been reached, or there is contraindication to use anthracycline, the patient is also eligible
Taxane resistance is defined as recurrence within 4 months of the last dose in the metastatic setting or within 12 months in the adjuvant setting
Having progressed on anti-HER2 or hormonal therapy if they have HER2 positive or hormone-receptor positive breast cancer
Eastern Cooperative Oncology Group (ECOG) performance status score ≤ 2 and a life expectancy >3 months.
Participants must have at least one target lesion as defined by RECIST 1.1 that allows for evaluation of tumor response
Absolute neutrophil count ≥ 1500 mm3, platelet count ≥ 100×109 L, hemoglobin ≥ 8.5 g/dL
Serum creatinine ≤1.5 times the upper limit of the normal range, total bilirubin ≤ 2 mg/dL, AST/ALT ≤ 5 times the upper limit of normal range
No remaining grade 2 or higher toxicity from prior cancer therapies unless judged to be clinically insignificant by the Principal Investigator
At least three (3) weeks from prior chemotherapy
Women of child-bearing potential (i.e., women who are pre-menopausal or not surgically sterile) must be willing to use an acceptable contraceptive method (abstinence, oral contraceptive or double barrier method) for the duration of the study and for 30 days following the last dose of study drug, and must have a negative urine or serum pregnancy test within 2 weeks prior to beginning treatment on this trial.

Exclusion Criteria

Inadequate renal function with a calculated creatinine clearance less than 51 mL/min.
History of ventricular fibrillation, sinus node or AV nodal disease, Wolff Parkinson White Syndrome, hemodynamically significant or life threatening cardiac arrhythmia.
Uncontrolled cardiac disease, congestive heart failure, angina or hypertension.
Myocardial infarction or unstable angina within 2 months of treatment.
Known human immunodeficiency virus (HIV) infection or chronic active Hepatitis B or C (patients are NOT required to be tested for the presence of such viruses prior to therapy on this protocol).
Active clinically serious infection > CTCAE (version 4.03) Grade 2.
Thrombotic or embolic events such as a cerebrovascular accident including transient ischemic attacks within the past 6 months.
Pulmonary hemorrhage/bleeding event ≥ CTCAE Grade 2 within 4 weeks of first dose of study drug.
Any other hemorrhage/bleeding event ≥ CTCAE Grade 3 within 4 weeks of first dose of study drug.
Serious non-healing wound, ulcer, or bone fracture.
Major surgery or significant traumatic injury within 2 weeks of first study drug.
Inability to complete informed consent process and adhere to the protocol treatment plan and follow-up requirements.
Concurrent severe illness such as active infection, or psychiatric illness/social situations that would limit safety and compliance with study requirements.
Currently on anti-coagulation therapy with Coumadin, and cannot be switched other forms of anti-coagulation.
Patients have symptomatic untreated brain metastasis or leptomeningeal metastases or treated but still symptomatic requiring the use of steroid within the past two weeks.
Patients receiving any other investigational agents. Pregnant or Lactating females.

Study & Design

Study Type: INTERVENTIONAL

Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Capecitabine with Digoxin	Capecitabine	Capecitabine PO daily b.i.d., no breaks, starts at day 1 of the first cycle; Digoxin: once daily, starts at day -7 of the first cycle (1 cycle - 4 weeks)
Capecitabine with Digoxin	Digoxin	Capecitabine PO daily b.i.d., no breaks, starts at day 1 of the first cycle; Digoxin: once daily, starts at day -7 of the first cycle (1 cycle - 4 weeks)

Primary Outcome Measures

Name	Time	Method
Metronomic Capecitabine With Oral Digoxin	One year	Evaluate the Growth Modulation Index (GMI) of the combination of metronomic capecitabine with oral digoxin in metastatic breast cancer

Secondary Outcome Measures

Name	Time	Method
Combination Overall Clinical Benefit by RECIST 1.1	One year	Assess the activity of this combination in terms of overall clinical benefit rates (CBR), including complete response (CR), partial response (PR) or stable disease (SD) as defined by Response Evaluation Criteria in Solid Tumors (RECIST 1.1)