PRIMARY OBJECTIVES:
I. To evaluate the safety and tolerability of ibrutinib in combination with azacitidine in
patients with higher risk myelodysplastic syndrome (MDS) and to determine the maximum
tolerated dose (MTD) or recommended Phase 2 dose of ibrutinib combined with azacitidine.
SECONDARY OBJECTIVES:
I. To do an early assessment of the efficacy of the combination of ibrutinib and azacitidine
in higher risk MDS. Specific secondary endpoints include: disease response per modified
International Working Group (IWG) 2006 response criteria for MDS, hematologic normalization
rate (HNR = complete remission [CR] + partial remission [PR] + hematologic improvement [HI]),
overall survival (OS), progression free survival (PFS), disease free survival (DFS), and time
to response (TTR).
TERTIARY OBJECTIVES:
I. To evaluate the pharmacodynamic and biological effects and impact of quality of life (QoL)
of the combination of ibrutinib and azacitidine in patients with higher risk MDS is the
exploratory objective of this study. Exploratory endpoints include: laboratory biomarker
analysis and effect on QoL assessments.
OUTLINE: This is a dose-escalation study of ibrutinib.
Patients receive azacitidine intravenously (IV) over 10-40 minutes or subcutaneously (SC)
once daily (QD) on days 1-7 or 1-5 and 8-9, and ibrutinib orally (PO) QD on days 1-28.
Treatment repeats every 28 days for up to 24 courses in the absence of disease progression or
unacceptable toxicity.
After completion of study treatment, patients are followed up every 3 months for 6 months.
Inclusion Criteria:
- Pathologically confirmed diagnosis of myelodysplastic syndrome
- Revised international prognostic scoring system (IPSS-R) intermediate, high or very
high
- For the dose escalation cohorts, any prior number of MDS therapies, including
hypomethylating agents, are permitted; for the dose expansion cohort, subjects must be
azacitidine naïve, but otherwise any prior number of MDS therapies are permitted;
treatment naïve patients are eligible for both the dose escalation and expansion
cohorts if they are unfit for or refuse intense therapy
- No specific hematologic parameters for study entry are required; transfusion-dependent
patients are eligible and platelet counts should be maintained greater than
10,000/mm^3
- Serum aspartate transaminase (AST) and alanine transaminase (ALT) =< 3.0 x upper limit
of normal (ULN)
- Estimated creatinine clearance >= 30 ml/min (Cockcroft-Gault)
- Bilirubin =< 1.5 x ULN (unless bilirubin rise is due to Gilbert's syndrome or of
non-hepatic origin)
- Prothrombin time (PT)/international normalized ratio (INR) < 1.5 x ULN and partial
thromboplastin time (PTT) (activated [a]PTT) < 1.5 x ULN
- Karnofsky performance status (KPS) performance status of 60% or greater
- Female subjects who are of non-reproductive potential (ie, post-menopausal by history
- no menses for >= 1 year; OR history of hysterectomy; OR history of bilateral tubal
ligation; OR history of bilateral oophorectomy); or, female subjects of childbearing
potential must have a negative serum pregnancy test upon study entry
- Male and female subjects who agree to use highly effective methods of birth control
during the period of therapy and for 30 days after the last dose of study drug
Exclusion Criteria:
- Known bleeding disorders, active bleeding disorders or clinical signs of bleeding
(grade >= 2)
- Prior bone marrow transplant within 3 months or with acute graft versus host disease
(GVHD)
- Prior treatment with a Bruton's tyrosine kinase (BTK) inhibitor
- Anticancer therapy including chemotherapy, immunotherapy, radiotherapy, hormonal or
any investigational therapy within 14 days or 5 half-lives prior to first dose of
study drug
- Unresolved toxicities from prior anti-cancer therapy, defined as having not resolved
to Common Terminology Criteria for Adverse Event (CTCAE, version 4.03), grade =< 1, or
to the levels dictated in the inclusion/exclusion criteria with the exception of
alopecia
- History of other malignancies, except:
- Malignancy treated with curative intent and with no known active disease present
for >= 1 years before the first dose of study drug and felt to be at low risk for
recurrence by treating physician
- Adequately treated non-melanoma skin cancer or lentigo maligna without evidence
of disease
- Adequately treated carcinoma in situ without evidence of disease
- Low-risk prostate cancer after curative surgery
- Concurrent systemic immunosuppressant therapy
- Vaccinated with live, attenuated vaccines within 4 weeks of first dose of study drug
- Recent infection requiring intravenous systemic treatment
- History of stroke or intracranial hemorrhage within 6 months prior to enrollment
- Known history of human immunodeficiency virus (HIV) or active with hepatitis C virus
(HCV) or hepatitis B virus (HBV); subjects who are positive for hepatitis B core
antibody or hepatitis B surface antigen must have a negative polymerase chain reaction
(PCR) result before enrollment; those who are PCR positive will be excluded
- Major surgery within 4 weeks of first dose of study drug
- Any life-threatening illness, medical condition, or organ system dysfunction that, in
the investigator's opinion, could compromise the subject's safety or put the study
outcomes at undue risk
- Currently active, clinically significant cardiovascular disease, such as uncontrolled
arrhythmia or class 3 or 4 congestive heart failure as defined by the New York Heart
Association Functional Classification; or a history of myocardial infarction, unstable
angina, or acute coronary syndrome within 6 months prior to enrollment
- Unable to swallow capsules or malabsorption syndrome, disease significantly affecting
gastrointestinal function, or resection of the stomach or small bowel, symptomatic
inflammatory bowel disease or ulcerative colitis, or partial or complete bowel
obstruction
- Concomitant use of warfarin or other vitamin K antagonists
- Requires treatment with a strong cytochrome P450 (CYP) family 3, subfamily A,
polypeptide 4/5 (3A4/5) inhibitor
- Lactating or pregnant
- Unwilling or unable to participate in all required study evaluations and procedures
- Unable to understand informed consent form (ICF)
