Sorafenib and Letrozole, Anastrozole, or Exemestane in Treating Postmenopausal Women With Estrogen Receptor-Positive and/or Progesterone Receptor-Positive Metastatic Breast Cancer

• ClinicalTrials.gov Identifier: NCT00573755
• Recruitment Status: Terminated
• First Posted: December 14, 2007
• Results First Posted: March 26, 2014
• Last Update Posted: February 5, 2016
• Sponsor: Mayo Clinic
• Collaborator: National Cancer Institute (NCI)
• Information provided by (Responsible Party): Mayo Clinic

Study Description

Brief Summary:

RATIONALE: Sorafenib may stop the growth of tumor cells by blocking blood flow to the tumor and by blocking some of the enzymes needed for cell growth. Estrogen can cause the growth of breast cancer cells. Aromatase inhibition therapy using letrozole, anastrozole, or exemestane may fight breast cancer by lowering the amount of estrogen the body makes. It is not yet known whether sorafenib is more effective than a placebo when given together with letrozole, anastrozole, or exemestane in treating metastatic breast cancer.

PURPOSE: This randomized phase II trial is studying how well sorafenib works compared with a placebo when given together with letrozole, anastrozole, or exemestane in treating postmenopausal women with estrogen receptor-positive and/or progesterone receptor-positive metastatic breast cancer.

Condition or disease	Intervention/treatment	Phase
Breast Cancer	Drug: anastrozole; Drug: exemestane; Drug: letrozole; Drug: sorafenib tosylate; Other: placebo	Phase 2

Detailed Description:

OBJECTIVES:

Primary

• To compare the progression-free survival of postmenopausal women with estrogen receptor- and/or progesterone receptor-positive metastatic breast cancer treated with sorafenib tosylate vs placebo and letrozole, anastrozole, or exemestane.

Secondary

• To compare the overall survival and time to treatment failure of patients treated with these regimens.
• To compare the objective tumor response rate and duration of response in patients treated with these regimens.
• To assess the adverse event profile of sorafenib tosylate in combination with aromatase inhibitors in these patients.

OUTLINE: This is a multicenter study. Patients are stratified according to prior aromatase inhibitor therapy (yes vs no) and line of endocrine therapy for metastatic disease (first-line vs second-line). Patients are randomized to 1 of 2 treatment arms.

• Arm I: Patients receive oral sorafenib tosylate twice daily and oral letrozole, anastrozole, or exemestane once daily on days 1-28.
• Arm II: Patients receive oral placebo twice daily and oral letrozole, anastrozole, or exemestane once daily on days 1-28.

In both arms, treatment repeats every 28 days in the absence of disease progression or unacceptable toxicity.

After completion of study therapy, patients are followed periodically for up to 5 years.

Study Design

• Study Type: Interventional (Clinical Trial)
• Actual Enrollment: 4 participants
• Allocation: Randomized
• Intervention Model: Parallel Assignment
• Masking: Double (Participant, Investigator)
• Primary Purpose: Treatment
• Official Title: Phase II Randomized Study of Sorafenib Compared to Placebo When Administered in Combination With Aromatase Inhibitors for Postmenopausal Women With Metastatic Breast Cancer
• Study Start Date: December 2007
• Actual Primary Completion Date: April 2013
• Actual Study Completion Date: April 2013

Arms and Interventions

Arm	Intervention/treatment
Experimental: Arm I; Patients receive oral sorafenib tosylate twice daily and oral letrozole, anastrozole, or exemestane once daily on days 1-28. Treatment repeats every 28 days in the absence of disease progression or unacceptable toxicity.	Drug: anastrozole; given orally; Drug: exemestane; given orally; Drug: letrozole; given orally; Drug: sorafenib tosylate; given orally
Active Comparator: Arm II; Patients receive oral placebo twice daily and oral letrozole, anastrozole, or exemestane once daily on days 1-28. Treatment repeats every 28 days in the absence of disease progression or unacceptable toxicity.	Drug: anastrozole; given orally; Drug: exemestane; given orally; Drug: letrozole; given orally; Other: placebo; given orally

Outcome Measures

Primary Outcome Measures :

1. Progression-free Survival [ Time Frame: Time from randomization to disease progression or death (up to 5 years) ]
   Progression-free survival was defined as the time from randomization to the earliest date of documentation of disease progression or death due to any cause. In the case of a participant started treatment and then never return for any evaluations, the participant was censored for progression 1 day post-randomization.

Secondary Outcome Measures :

1. Overall Survival [ Time Frame: Time from randomization to death (up to 5 years) ]
   Survival time was defined as the time from randomization to death due to any cause.
2. Time to Treatment Failure [ Time Frame: Time from randomization to treatment failure (up to 5 years) ]
   Time to treatment failure was defined as the time from the date of the randomization to the date at which the patient was removed from treatment due to progression, adverse events, or refusal.
3. Objective Tumor Response Rate [ Time Frame: Up to 5 years ]
   A confirm response was defined as either a complete response (CR) or partial response (PR) noted as the objective status on 2 consecutive evaluation at least 4 weeks apart. The confirmed response rate was estimated within each treatment group by the number of confirmed responses divided by the total number of participants randomized.
4. Duration of Response [ Time Frame: Up to 5 years ]
   Duration of response was defined for all patients who have achieved a confirmed response as the date at which the patient's earliest best objective status was first noted to be either a CR or PR to the earliest date progression was documented.
5. Adverse Event [ Time Frame: Time from randomization to end of treatment ]
   Number of participants that experienced adverse events (grade 3 and above) as measured by NCI Common Terminology Criteria for Adverse Events (CTCAE) v3.0. Adverse events were assessed every week during first 6 weeks of therapy, every 4 weeks on months 1 to 6, every 12 weeks on months 7 and beyond and at the end of treatment.

Eligibility Criteria

• Ages Eligible for Study: 18 Years to 120 Years (Adult, Older Adult)
• Sexes Eligible for Study: Female
• Accepts Healthy Volunteers: No

Criteria

DISEASE CHARACTERISTICS:

• Histologically or cytologically confirmed adenocarcinoma of the breast

  • Metastatic disease

• Measurable disease, defined as ≥ 1 unidimensionally measurable lesion ≥ 20 mm by conventional techniques (i.e., MRI or CT scan of chest, abdomen and pelvis) or ≥ 10 mm by spiral CT scan

  • Non-measurable disease allowed, defined as all other lesions (or sites of disease), including small lesions (longest diameter < 20 mm by conventional techniques or < 10 mm by spiral CT scan)
• Must have objective evidence of progression within the past 3 months
• No human epidermal growth factor receptor 2 (HER2)/neu overexpression, defined as gene amplification by fluorescence in situ hybridization or 3+ overexpression by immunohistochemistry, or unknown HER2/neu status

• No active brain metastases

  • Patients with neurological symptoms must undergo a contrast CT scan or MRI of the brain to exclude active brain metastasis
  • Patients with treated brain metastases allowed provided they have no evidence of disease and have been off definitive therapy (including steroids) for the past 3 months

• Hormone receptor status:

  • Estrogen receptor- and/or progesterone receptor-positive disease

PATIENT CHARACTERISTICS:

• Female
• The Eastern Cooperative Oncology Group (ECOG) performance status 0-1
• Postmenopausal
• Hemoglobin ≥ 9.0 g/dL
• ANC ≥ 1,500/mm³
• Platelet count ≥ 100,000/mm³
• Total bilirubin ≤ 1.5 times upper limit of normal (ULN)
• ALT and AST ≤ 2.5 times ULN (≤ 5 times ULN for patients with liver involvement)
• INR ≤ 1.5
• PTT within normal limits
• Creatinine ≤ 1.5 times ULN
• Not nursing, pregnant, or able to become pregnant
• No significant traumatic injury within the past 4 weeks
• No history of bleeding diathesis or uncontrolled coagulopathy
• No serious, nonhealing wound, ulcer, or bone fracture

• No clinically significant cardiac disease, including any of the following:

  • New York Heart Association class III-IV congestive heart failure
  • Unstable angina (i.e., anginal symptoms at rest) or new-onset angina (i.e., began within the past 3 months)
  • Myocardial infarction within the past 6 months
• No cardiac ventricular arrhythmias requiring antiarrhythmic therapy
• No uncontrolled hypertension (systolic BP > 150 mm Hg or diastolic BP > 90 mm Hg), despite optimal medical management
• No thrombolic, embolic, venous, or arterial events (e.g., cerebrovascular accident including transient ischemic attacks) within the past 6 months
• No pulmonary hemorrhage or bleeding event > grade 2 within the past 4 weeks
• No other hemorrhage or bleeding event ≥ grade 3 within the past 4 weeks
• No active clinically serious infection > grade 2
• No known HIV infection
• No chronic hepatitis B or C infection
• No previous or concurrent cancer that is distinct in primary site or histology from breast cancer except carcinoma in situ of the cervix, treated basal cell skin cancer, superficial bladder tumors (i.e., Ta and Tis), or any cancer curatively treated within the past 5 years
• No known or suspected allergy to sorafenib tosylate or other agents used in this study

PRIOR CONCURRENT THERAPY:

• See Disease Characteristics
• No major surgery or open biopsy within the past 4 weeks
• No more than 1 prior regimen of endocrine therapy for metastatic breast cancer, provided that the patient has not received an aromatase inhibitor within the past 12 months
• No more than 1 prior regimen of chemotherapy for metastatic disease

• More than 2 weeks since prior radiotherapy, except if to a non-target lesion only or single-dose radiotherapy for palliation

  • Prior radiotherapy to a target lesion(s) is permitted only if there has been clear progression of the lesion since radiotherapy was completed
• Concurrent anticoagulation treatment (e.g., warfarin or heparin) allowed
• No concurrent Hypericum perforatum (St. John's wort), rifampin, bevacizumab, or any other drugs (licensed or investigational) that target vascular endothelial growth factor (VEGF) or VEGF receptors
• No concurrent cytochrome P450 enzyme-inducing anti-epileptic drugs (e.g., phenytoin, carbamazepine, or phenobarbital)

Contacts and Locations

Locations

United States, Arizona

Mayo Clinic in Arizona

Scottsdale, Arizona, United States, 55259

United States, Florida

Mayo Clinic in Florida

Jacksonville, Florida, United States, 32224

United States, Minnesota

Mayo Clinic

Rochester, Minnesota, United States, 55905

Sponsors and Collaborators

Mayo Clinic

National Cancer Institute (NCI)

Investigators

• Study Chair: Vivek Roy, MD; Mayo Clinic
• Principal Investigator: Donald W Northfelt, M.D.; Mayo Clinic
• Principal Investigator: Timothy J Hobday, M.D.; Mayo Clinic

More Information

• Responsible Party: Mayo Clinic
• ClinicalTrials.gov Identifier: NCT00573755
• Other Study ID Numbers: RC0731; P30CA015083 ( U.S. NIH Grant/Contract ); RC0731 ( Other Identifier: Mayo Clinic Cancer Center ); 07-005768 ( Other Identifier: Mayo Clinic IRB )
• First Posted: December 14, 2007
• Results First Posted: March 26, 2014
• Last Update Posted: February 5, 2016
• Last Verified: October 2015

Keywords provided by Mayo Clinic:

stage IV breast cancer; recurrent breast cancer

Additional relevant MeSH terms:

Breast Neoplasms; Neoplasms by Site; Neoplasms; Breast Diseases; Skin Diseases; Sorafenib; Letrozole; Anastrozole; Exemestane; Antineoplastic Agents; Protein Kinase Inhibitors; Enzyme Inhibitors; Molecular Mechanisms of Pharmacological Action; Aromatase Inhibitors; Steroid Synthesis Inhibitors; Estrogen Antagonists; Hormone Antagonists; Hormones, Hormone Substitutes, and Hormone Antagonists; Physiological Effects of Drugs; Antineoplastic Agents, Hormonal