Carfilzomib, Rituximab and Dexamethasone in Waldenstrom's Macroglobulinemia

Phase 2

Completed

Conditions: Waldenstrom's Macroglobulinemia

Interventions: Drug: Dexamethasone
Drug: Carfilzomib
Drug: Rituximab

Registration Number: NCT01470196

Lead Sponsor: Dana-Farber Cancer Institute

Brief Summary: Carfilzomib is a drug that has shown anti-tumor activity by inhibiting the proteasome within the cell, which is responsible for degrading or breaking down a wide variety of proteins. Carfilzomib has not been approved by the FDA.

Rituximab and dexamethasone are often used to treat Waldenstrom's Macroglobulinemia (WM), alone or in combination with other drugs. Combinations with rituximab, dexamethasone and proteasome inhibitors, like carfilzomib, show high levels of activity in WM patients.

In this research study, the investigators are testing the safety and efficacy of Carfilzomib when used along with Rituximab and Dexamethasone as a possible treatment for Waldenstrom's Macroglobulinemia.

Detailed Description: If you take part in this research study, you will receive Carfilzomib and dexamethasone as an infusion on Days 1, 2, 8, and 9 for Cycles 1-6. You will then have a Rituximab infusion on Days 2 and 9. Each cycles lasts 21 days. After completing Cycle 6 and if you are eligible, there will be a 2 month break before the maintenance phase is started. During this break, you will have a study visit with a physical exam, blood tests, and a bone marrow biopsy. If you continue to the maintenance phase, you will receive Carfilzomib and Dexamethasone on Days 1 and 2 and Rituximab on Day 2 of Cycles 1-8. Each cycle will continue to last 21 days, but will take place every 2 months. Infusions will last between 2-6 hours.

During all cycles you will have a physical exam and you will be asked questions about your general health and specific questions about any problems that you might be having and any medications you may be taking. Blood tests will also be done at each Cycle visit, and you will complete a questionnaire. Bone marrow and CT scan will only be repeated at physician discretion when appropriate and in order to ensure your response to treatment.

Recruitment & Eligibility

Status: COMPLETED

Sex: All

Target Recruitment: 31

Inclusion Criteria

Diagnosis of Waldenstrom's Macroglobulinemia
Symptomatic disease
Measurable disease
Life expectancy of greater than 12 weeks
Adequate organ and marrow function
CD20 positive based on any previous performed bone marrow immunohistochemistry or flow cytometric analysis
Disease free of prior malignancies for >/= 5 years with the exception of currently treated basal cell, squamous cell carcinoma of the skin, or carcinoma "in situ" of the cervix or breast

Exclusion Criteria

More than one prior therapy
Previous therapy with a proteasome inhibitor or rituximab
Chemotherapy or radiotherapy within 4 weeks (6 weeks for nitrosoureas or mitomycin C) prior to entering the study or not recovered from adverse events due to agents administered more than 4 weeks earlier
Currently receiving treatment for any malignancy
Major surgery within 21 days prior to study entry
Acute active infection requiring treatment (systemic antibiotics, antivirals, or antifungals) within 14 days prior to study entry
Uncontrolled hypertension or uncontrolled diabetes
Significant neuropathy (Grades 3-4, or Grade 2 with pain) within 14 days prior to study entry
Known history of allergy to Captisol
Receiving any other study agents
Known brain metastases
History of allergic reactions attributed to compounds of similar chemical or biologic composition to carfilzomib, rituximab, and/or dexamethasone
Contraindication to any of the required concomitant drugs or supportive treatments, including hypersensitivity to all anticoagulation and antiplatelet options, antiviral drugs, or intolerance to hydration due to preexisting pulmonary or cardiac impairment
Uncontrolled intercurrent illness including, but not limited to ongoing or active infection, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, or psychiatric illness/social situations that would limit compliance with study requirements
Pregnant or lactating
HIV-positive on combination antiretroviral therapy

Study & Design

Study Type: INTERVENTIONAL

Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Treatment Arm	Dexamethasone	Carfilzomib, dexamethasone, rituximab
Treatment Arm	Carfilzomib	Carfilzomib, dexamethasone, rituximab
Treatment Arm	Rituximab	Carfilzomib, dexamethasone, rituximab

Primary Outcome Measures

Name	Time	Method
Overall Response Rate	4 years	Overall Response Rate= Minor response (\>25%-50% reduction in serum IgM from baseline + Partial Response (\>50-90% reduction in serum IgM from baseline) + Very Good Partial Response (\>90% reduction in serum IgM from baseline) + Complete Response (resolution of all symptoms, normalization of serum IgM with disappearance of IgM paraprotein, resolution of any adenopathy or splenomegaly).
Neuropathy Incidence Rate	3 years	Number and percentage of participants who experienced neuropathy attributable to CaRD therapy
Time to Progression	4 years	Progression-free survival is the defined as the time from study entry to disease progression (PD) or death. Patients without PD are censored at the date of last disease evaluation. PD is defined as a greater than 25% increase in serum IgM and 500mg/dL absolute increase from the lowest attained response value as determined by serum electrophoresis, confirmed by at least one other investigation, or progression of clinically significant disease related symptom(s).
Major Response Rate	4 years	Major Response Rate= Partial Response (\>50-90% reduction in serum IgM from baseline) + Very Good Partial Response (\>90% reduction in serum IgM from baseline) + Complete Response (resolution of all symptoms, normalization of serum IgM with disappearance of IgM paraprotein, resolution of any adenopathy or splenomegaly).
Very Good Partial Response and Complete Response Rate	4 years	This is the rate of VGPR and CR in patients on CaRD therapy. Very good partial responses are \>90% reduction in serum IgM from baseline. Complete response is defined as having resolution of all symptoms, normalization of serum IgM levels with complete disappearance of IgM paraprotein by immunofixation, and resolution of any adenopathy or splenomegaly.