The primary objective of this study is to assess the efficacy of fostamatinib in subjects with warm antibody autoimmune hemolytic anemia (wAIHA).



Eligible Ages
Between 18 Years and 100 Years
Eligible Genders
Accepts Healthy Volunteers

Inclusion Criteria

  1. Subject must have a diagnosis of primary or secondary wAIHA as documented by a positive direct antiglobulin test (DAT) specific for anti-IgG or anti-IgA.
  2. Have failed or not tolerated at least one prior wAIHA treatment regimen, including steroids, rituximab, azathioprine, cyclophosphamide, cyclosporine, MMF, danazol, vincristine, ESA or splenectomy (folate, iron or other supplements do not fulfill this criterion).
  3. Have haptoglobin <LLN or total bilirubin >ULN or lactate dehydrogenase (LDH) >ULN.
  4. At screening, subject's hemoglobin level must be ≤9 g/dL OR if hemoglobin value >9 g/dL and <10 g/dL, subject must be on an allowed wAIHA treatment AND the subject must have documented symptoms related to anemia (e.g., weakness, dizziness, fatigue, shortness of breath, chest pain).
  5. Male or female at least 18 years of age at screening.
  6. Karnofsky performance status (KPS) ≥70.
  7. Subject's concurrent treatment for wAIHA may consist of no more than two of any of the following agents: azathioprine, steroids, ESAs, mycophenolate mofetil, dapsone or danazol at a stable dose

Exclusion Criteria

  1. Subject with other types of AIHA (e.g., cold antibody AIHA, cold agglutinin syndrome, mixed type AIHA, or paroxysmal cold hemoglobinuria).
  2. Subject has AIHA secondary to autoimmune disease, including systemic lupus erythematosus (SLE), or lymphoid malignancy if the underlying disease is not stable or is not well-controlled on current therapy, per investigator medical judgement.
  3. Subject has uncontrolled or poorly controlled hypertension, defined as systolic blood pressure ≥135 mmHg or diastolic blood pressure ≥85 mmHg, whether or not the subject is receiving anti-hypertensive treatment.
  4. Subject has one or more of the following laboratory abnormalities at screening: neutrophil count of <1,000/μL or platelet count of <30,000/μL, unless due to Evans syndrome; transaminase levels (i.e., alanine aminotransferase [ALT] or aspartate aminotransferase [AST]) >1.5 x ULN.
  5. Has documented active hepatitis B or hepatitis C infection or HIV infection.

Study Design

Phase 3
Study Type
Intervention Model
Parallel Assignment
Primary Purpose
Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)

Arm Groups

ArmDescriptionAssigned Intervention
Initial dose is 100 mg PO bid. At week 4 dose will be increased to fostamatinib 150 mg PO bid if subjects have adequately tolerated the study drug in the opinion of the Investigator.
  • Drug: Fostamatinib disodium
    Fostamatinib (100mg PO bid or 150 mg PO bid) The dose may be reduced at any time to a dose as low as fostamatinib 100 mg PO qd or matching placebo if dose limiting adverse events are observed.
    Other names:
    • R935788
    • Fostamatinib
Placebo Comparator
Initial dose is 100 mg PO bid. At week 4 dose will be increased to placebo 150 mg PO bid if subjects have adequately tolerated the study drug in the opinion of the Investigator.
  • Drug: Placebo

Recruiting Locations

Montefiore Medical Center
Bronx, New York 10461
Irina Murakhovskaya, MD

More Details

Rigel Pharmaceuticals

Study Contact


Study information shown on this site is derived from ClinicalTrials.gov (a public registry operated by the National Institutes of Health). The listing of studies provided is not certain to be all studies for which you might be eligible. Furthermore, study eligibility requirements can be difficult to understand and may change over time, so it is wise to speak with your medical care provider and individual research study teams when making decisions related to participation.