CC-4047 in Treating Patients With Myelofibrosis

OBJECTIVES:

Phase I:

Primary

- To determine the Maximum Tolerated Dose of CC-4047 in the treatment of Primary, Post
Polycythemia Vera, or Post Essential Thrombocythemia Myelofibrosis (PMF, post-PV MF, or
post-ET MF).

Phase II:

Primary

- Best overall response as determined by International Working Group Criteria over the
first 6 cycles (168 days) of study treatment.

Secondary

- Safety (type, frequency, severity [National Cancer Institute (NCI) Common Terminology
Criteria for Adverse Events (CTCAE) version 3.0] of adverse events (AEs), and
relationship of AEs to CC-4047.

- Duration of response.

- Time to response.

- Best overall response as determined by International Working Group Criteria over the
first 12 cycles (336 days) of study treatment.

OUTLINE: Patients receive oral CC-4047. Treatment repeats every 28 days in the absence of
disease progression or unacceptable toxicity.

After completion of study treatment, patients are followed at 28 days and then every 6 months
for up to 3 years.

DISEASE CHARACTERISTICS:

- Diagnosis of primary and post essential thrombocythemia (ET) or post polycythemia vera
(PV) myelofibrosis requiring therapy

- De novo presentation (i.e., agnogenic myeloid metaplasia AND post ET or post PV
myelofibrosis)

- Developed after an antecedent history of PV (i.e., post polycythemic myeloid
metaplasia) or essential polycythemia (i.e., post thrombocythemic myeloid
metaplasia)

- Total hemoglobin < 10 g/dL OR transfusion dependent anemia (defined by a history of ≥
2 units of red blood cell (RBC) transfusions within the past 28 days for hemoglobin <
8.5 g/dL that was not associated with overt bleeding) OR marked splenomegaly (e.g., ≥
10 cm below costal margin)

PATIENT CHARACTERISTICS:

- Eastern Cooperative Oncology Group (ECOG) performance status 0-2

- Absolute neutrophil count (ANC) ≥ 500/μL

- Platelet count ≥ 20,000/μL

- Aspartate aminotransferase (AST) and Alanine aminotransferase (ALT) ≤ 3 times upper
limit of normal (ULN) (≤ 5 times ULN if attributed to hepatic extramedullary
hematopoiesis)

- Total bilirubin ≤ 3 times ULN OR direct bilirubin ≤ 2 times ULN

- Serum creatinine ≤ 2.0 mg/dL

- Not pregnant or nursing

- Negative pregnancy test

- Fertile patients must use effective double-method contraception for ≥ 28 days before,
during, and for ≥ 28 days after completion of study treatment

- Agrees to abstain from donating blood, semen, or sperm during and for ≥ 28 days after
completion of study treatment

- Willing to undergo transfusion of blood products (if applicable)

- Able to complete questionnaire(s) alone or with assistance

- No known HIV positivity, hepatitis B carrier, or active hepatitis C infection

- No serious medical condition, psychiatric illness, or any other condition, including
the presence of laboratory abnormalities, that (as judged by the treating physician)
would preclude giving informed consent or participating in the study or confound the
ability to interpret data from the study

- No other active malignancies, except basal cell or squamous cell carcinoma of the skin
or carcinoma in situ of the cervix or breast

- No active deep vein thrombosis or pulmonary embolism that has not been therapeutically
anticoagulated

PRIOR CONCURRENT THERAPY:

- Recovered from all prior therapy

- No prior CC-4047

- More than 28 days since prior growth factors, cytotoxic chemotherapeutic agents (e.g.,
hydroxyurea or anagrelide), corticosteroids, or experimental drugs or therapies

- No other concurrent experimental drugs or therapies or cytotoxic chemotherapeutic
agents (e.g., hydroxyurea or anagrelide) for myelofibrosis

- No concurrent growth factors (including erythropoietin) for myelofibrosis, except
G-CSF or pegfilgrastim

- No concurrent chronic use (i.e., > 2 weeks) of more than physiologic doses of
corticosteroids (dose equivalent to > 10 mg/day of prednisone)