A Study of Luspatercept (ACE-536) to Treat Anemia Due to Very Low, Low, or Intermediate Risk Myelodysplastic Syndromes



Status:Active, not recruiting
Conditions:Blood Cancer, Blood Cancer, Anemia
Therapuetic Areas:Hematology, Oncology
Healthy:No
Age Range:18 - Any
Updated:9/20/2018
Start Date:February 9, 2016
End Date:November 5, 2020

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A Phase 3, Double-blind, Randomized Study to Compare the Efficacy and Safety of Luspatercept (ACE-536) Versus Placebo for the Treatment of Anemia Due to the IPSS-R Very Low, Low, or Intermediate Risk Myelodysplastic Syndromes in Subjects With Ring Sideroblasts Who Require Red Blood Cell Transfusions.

The study will be conducted in compliance with the International Council on Harmonisation
(ICH) of Technical Requirements for Registration of Pharmaceuticals for Human Use/Good
Clinical Practice (GCP) and applicable regulatory requirements.

This is a Phase 3, double-blind, randomized, placebo-controlled, multicenter study to
determine the efficacy and safety of luspatercept (ACE-536) versus placebo in subjects with
anemia due to IPSS-R very low, low, or intermediate MDS with ring sideroblasts who require
RBC transfusions.

Anemia is considered to be one of the most prevalent cytopenias in patients who have
myelodysplastic syndromes, an umbrella term used to describe disorders relating to the
ineffective production of red blood cells, white blood cells, and/or platelets. Ranging in
severity from mild (asymptomatic) to severe, anemia can result in patients requiring regular
red blood cell (RBC) transfusions, which can lead to further complications from iron
overload. The goal of this study is to assess the safety and efficacy of luspatercept versus
placebo in anemic patients who are categorized as International Prognostic Scoring
System-Revised (IPSS-R) very low, low, or intermediate risk Myelodysplastic syndrome (MDS),
have ring sideroblasts present, and require constant RBC transfusions. The design of the
study will allow a period of initial randomization of patients into either the luspatercept
or placebo arm, followed by a double-blind treatment period, and then an MDS disease
assessment visit. For those patients that are determined to be experiencing clinical benefit
as judged from the study Investigator by this disease assessment visit, they will be
permitted to enter the double-blind Extension Phase of the study. Once patients are
discontinued from study treatment, they will enter a post treatment follow-up period.

Inclusion Criteria:

Subjects must satisfy the following criteria to be enrolled in the study:

1. Subject is ≥ 18 years of age the time of signing the informed consent form (ICF).

2. Documented diagnosis of MDS according to World Health Organization (WHO)/French
American British (FAB) classification that meets IPSS R classification of very low,
low, or intermediate risk disease, and:

Ring sideroblast ≥ 15% of erythroid precursors in bone marrow or ≥ 5% (but < 15%) if SF3B1
mutation is present.

- < 5% blasts in bone marrow

- Peripheral blood WBC count < 13,000/µL 3. Requires red blood cell RBC transfusions 4.
Eastern Cooperative Oncology Group (ECOG) score of 0, 1, or 2 5. Subjects who are
refractory/intolerant/ineligible to prior ESA treatment, defined as:

- Refractory to prior Erythropoiesis- stimulating agents(ESA) treatment: documentation
of non-response or response that is no longer maintained to prior ESA-containing
regimen, either as single agent or combination (eg, with G-CSF); ESA regimen must have
been either recombinant human erythropoietin (rHu EPO) ≥ 40,000 IU/wk for at least 8
doses or equivalent OR darbepoetin alpha ≥ 500 μg Q3W for at least 4 doses or
equivalent

- Intolerant to prior ESA treatment: documentation of discontinuation of prior
ESA-containing regimen, either as single agent or combination (eg, with G-CSF), at any
time after introduction due to intolerance or an adverse event

- ESA ineligible: low chance of response to ESA base on endogenous serum erythropoietin
level > 200 U/L for subjects not previously treated with ESAs

Exclusion Criteria:

The presence of any of the following will exclude a subject from enrollment:

1. Prior therapy with disease modifying agents for underlying MDS disease.

2. Previously treated with either luspatercept (ACE-536) or sotatercept (ACE-011)

3. MDS associated with del 5q cytogenetic abnormality

4. Secondary MDS, ie, MDS that is known to have arisen as the result of chemical injury
or treatment with chemotherapy and/or radiation for other diseases.

5. Known clinically significant anemia due to iron, vitamin B12, or folate deficiencies,
or autoimmune or hereditary hemolytic anemia, or gastrointestinal bleeding

- iron deficiency to be determined by serum ferritin less than or equal to 15 ug/L and
additional testing if clinically indicated (eg, calculated transferrin saturation
[iron/total iron binding capacity less than or equal to 20%] or bone marrow aspirate
stain for iron).

6. Prior allogeneic or autologous stem cell transplant

7. Known history of diagnosis of Acute myeloid leukemia (AML)

8. Use of any of the following within 5 weeks prior to randomization:

- anticancer cytotoxic chemotherapeutic agent or treatment

- corticosteroid, except for subjects on a stable or decreasing dose for ≥ 1 week
prior to randomization for medical conditions other than MDS

- iron-chelating agents, except for subjects on a stable or decreasing dose for at
least 8 weeks prior to randomization

- other RBC hematopoietic growth factors (eg, Interleukin-3)

- investigational drug or device, or approved therapy for investigational use. If
the half-life of the previous investigational product is known, use within 5
times the half-life prior to randomization or within 5 weeks, whichever is longer
is excluded.

9. Prior history of malignancies, other than MDS, unless the subject has been free of the
disease (including completion of any active or adjuvant treatment for prior
malignancy) for ≥ 5 years. However, subjects with the following history/concurrent
conditions are allowed:

- Basal or squamous cell carcinoma of the skin

- Carcinoma in situ of the cervix

- Carcinoma in situ of the breast

- Incidental histologic finding of prostate cancer (T1a or T1b using the tumor,
nodes, metastasis [TNM] clinical staging system)

10. Major surgery within 8 weeks prior to randomization. Subjects must have completely
recovered from any previous surgery prior to randomization
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1211 Medical Center Dr
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