Safety of ICL670 vs. Deferoxamine in Sickle Cell Disease Patients With Iron Overload Due to Blood Transfusions



Status:Completed
Conditions:Anemia, Hematology
Therapuetic Areas:Hematology
Healthy:No
Age Range:2 - Any
Updated:3/2/2017
Start Date:May 2003

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A Randomized, Open Label, Phase II Study on Safety and Efficacy of Long Term Treatment of ICL670 Relative to Deferoxamine in Sickle Cell Disease Patients With Transfusional Hemosiderosis

The purpose of this study is to determine if the new orally active iron chelator, ICL670, is
as safe as deferoxamine in preventing accumulation of iron in the body while a patient is
undergoing repeated blood transfusions.

Patients who require repeated blood transfusions accumulate iron in the body as blood cells
contain iron and there is no natural body mechanism to eliminate it. After a while the iron
levels get high enough to be toxic to the body. The current therapy of choice is
deferoxamine which does a good job of removing excess iron, but is difficult to administer.
Deferoxamine requires subcutaneous (under the skin) infusions over 4 to 8 hours nightly 3 to
7 nights per week. In addition to the need to wear an infusion pump nightly, adverse
reactions around the site of the injection are frequent.

Inclusion Criteria:

- Age greater than or equal to 2 years

- Sickle cell disease patients already treated with or suitable for treatment with
deferoxamine 20 to 40 mg/kg/day

- Serum ferritin greater than 1000 mg/ml

- Liver iron content greater than 2 mg iron/g dw assessed by means of superconducting
quantum interference device (SQUID) for patients who receive simple transfusions and
greater than 5 mg iron/ g dw for patients who receive exchange transfusions or who
have a history of intermittent blood transfusion.

- Regular transfusion aimed at maintaining % Hb A above 50% or a previous history of
simple transfusion being the recipient of at least 20 units of packed red blood
cells.

Exclusion Criteria:

- Chronic anemias other than sickle cell disease

- Documented toxicity to deferoxamine

- Elevated liver enzymes in the year preceeding enrollment

- Active hepatitis B or hepatitis C

- HIV seropositivity

- Elevated serum creatinine or significant proteinuria

- History of nephrotic syndrome

- Uncontrolled systemic hypertension

- Fever and other signs/symptoms of infection within 10 days prior to the start of the
study

- Presence of clinically relevant cataract or previous history of clinically relevant
ocular toxicity related to iron chelation

- Second or third degree AV block, clinically relevant Q-T interval prolongation, or
patients requiring digoxin or other drugs that prolong the Q-T interval (other than
beta-adrenergic receptor blocking agents).

- Diseases (cardiovascular, renal, hepatic, etc.) that would prevent the patient from
undergoing any of the treatment options

- Psychiatric or addictive disorders that would prevent the patient from giving
informed consent

- History of drug or alcohol abuse within the 12 months prior to the study

- Pregnant or breast feeding patients

- Patients treated with systemic investigational drugs within 4 weeks or topical
investigational drugs within 7 days before the start of the study

- Patients who require concomitant therapy with hydroxyurea

- Any surgical or medical condition that might significantly alter the absorption,
distribution, metabolism or excretion of any drug, such as gastrointestinal disease
or major surgery, renal disease, difficulty voiding or urinary obstruction, or
impaired pancreatic function

- Non-compliant or unreliable patients

- Patients unable to undergo any study procedures such as the hearing or eye tests, or
the liver echocardiography

- Patients unable to undergo SQUID examination
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Cincinnati, Ohio 45219
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500 University Dr
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Rochester, New York 14642
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