Study to Evaluate the Efficacy and Safety of Deferasirox Film-coated Tablet Versus Phlebotomy in Patients With Hereditary Hemochromatosis (HH)

Study Overview
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Brief Summary
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The purpose of this study is to evaluate the efficacy and safety of deferasirox film coated tablet (FCT) versus phlebotomy for the management of iron overload in adults with HH at risk of iron-related morbidity. This evaluation will provide information on the two treatment options in terms of the rate of response of proportion of patients reaching the study target SF ≤ 100 μg/L and their associated safety profiles. In addition to exploring the safety and efficacy of deferasirox FCT in hereditary hemochromatosis (HH), this study is being conducted to fulfill an FDA post-marketing requirement [PMC 750-10 (Exjade) /PMR 2888-8 (Jadenu)] to provide additional randomized data to confirm the ocular safety profile of deferasirox through detailed ocular assessments in patients treated with deferasirox FCT for 2 years.

Official Title
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A Phase II, Multicenter, Open-label, Randomized Two-year Study to Evaluate the Efficacy and Safety of Deferasirox Film-coated Tablet Versus Phlebotomy in Patients With Hereditary Hemochromatosis.

Conditions
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Hereditary Hemochromatosis

Intervention / Treatment
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* Drug: Deferasirox FCT
* Procedure: Phlebotomy


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Written informed consent must be obtained prior to any screening procedures. Patients eligible for inclusion must meet all following criteria prior to receiving study treatment: 1. Male or female ≥ 18-years-old 2. Documented genotype testing confirming homozygous for the C282Y mutation (C282Y/C282Y) 3. Transferrin saturation ≥ 45% (at either screening visit) 4. Serum ferritin (SF) ≥ 500 μg/L (at either screening visit) - Exclusion Criteria: Medical conditions that preclude inclusion: Iron overload not due to HH Condition which might significantly alter the absorption, distribution, metabolism or excretion of oral deferasirox Systemic disease which prevents taking study treatment or any contraindication to phlebotomy Inflammatory condition or immunological disease which may interfere with the SF interpretation, such as an active infection, collagen vascular disorders, irritable bowel syndrome, lupus, or immune thrombocytopenia Significantly impaired gastrointestinal function or disease that may significantly alter the absorption of oral deferasirox, e.g. ulcerative diseases, uncontrolled nausea, vomiting, diarrhea, malabsorption syndrome, or small bowel resection. Psychiatric or addictive disorder which prevent giving informed consent or undergoing any of the treatment options or unwilling or unable to comply with the protocol Uncontrolled or significant cardiac disease or symptomatic cardiac arrhythmias, e.g., sustained ventricular tachycardia and clinically significant second or third degree AV block without a pacemaker. Illicit drug use and/or alcohol use, defined as an average alcohol consumption greater than one standard drink a day for women or two standard drinks a day for men within the 12 months prior to enrolment. A standard drink is generally considered to be 12 ounces of beer, 5 ounces of wine, or 1.5 ounces of 80-proof distilled spirits Cirrhosis, including Child-Pugh class A, B, and C, diagnosed by liver biopsy, elastography, radiologic exams, or clinical criteria Active hepatitis B or C (hepatitis B carrier will be allowed) History of HIV seropositivity (ELISA or Western blot) Organ transplant recipient Malignancy of any organ system, treated or untreated, within the past 5 years whether or not there is evidence of local recurrence or metastases, except localized basal cell carcinoma of the skin, or any history of hepatocellular carcinoma Concomitant therapy that precludes enrollment: Prior iron chelation therapy Prohibited concomitant medications with deferasirox Abnormal Laboratory Values: Significant anemia that contraindicates phlebotomy (males with hemoglobin < 130g/L, females with hemoglobin < 120g/L) in both screening visit samples Platelets ≤ 50 x 109/L in both screening visit samples Urine protein/urine creatinine ratio > 1.0 mg/mg in both non-first void urine screening visit samples Creatinine clearance ≤ 40 ml/min, or use the locally approved contraindication limit in prescribing information if it is stricter, in both screening visit samples Serum creatinine > 1.5 x ULN in both screening visit samples ALT ≥ 5 x ULN in both screening visit samples Total bilirubin > 1.5 x ULN in both screening visit samples Participation in an investigational study: Observational registry study is allowable Within 30 days prior to enrollment or within 5-half-lives of an investigational product, whichever is longer Treatment with a systemic investigational drug within 4 weeks or topical investigational drug within 7 days of starting the study Pregnancy and contraception: Pregnant or nursing (lactating) women Women of child-bearing potential, defined as all women physiologically capable of becoming pregnant, unless using basic methods of contraception, such as: Total abstinence Periodic abstinence (calendar, ovulation, symptothermal, post-ovulation methods) and withdrawal are unacceptable methods. Female sterilization (bilateral oophorectomy with or without hysterectomy), total hysterectomy, or tubal ligation at least six weeks before taking study treatment. If oophorectomy alone, hormone levels must confirm menopause. Male sterilization (at least 6 months prior to screening). The vasectomized male must be the sole partner. Barrier methods of contraception: condom or occlusive cap For UK: spermicidal foam/gel/film/cream/vaginal suppository Placement of an intrauterine device or intrauterine system Women considered as post-menopausal and not of childbearing potential are allowed to be enrolled in the trial if they have had 12 months of natural (spontaneous) amenorrhea with an expected clinical profile, e.g., age appropriate and history of vasomotor symptoms. Other protocol-defined inclusion/exclusion may apply. -

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Deferasirox FCT Arm<br>randomized in a 2:1 ratio: Deferasirox or phebotomy | Drug: Deferasirox FCT<br>* Taken orally once per day (QD)<br>* Other names: ICL670;|
| Experimental: phlebotomy<br>randomized in a 2:1 ratio: Deferasirox or phebotomy | Procedure: Phlebotomy<br>* according to investigator's decision<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Response rate by month 24 | Percentage of participants achieving target serum ferritin (SF) ≤ 100 μg/L on or before 24 months. | Up to 24 months | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Percentage of participants with ocular adverse events (AEs) | Percentage of participants with at least one ocular AE (new or worsening from baseline) occurring during on-treatment period. On-treatment period: from the day of the first dose of study medication or the first phlebotomy to 30 days after the last dose of study medication or last phlebotomy. | 24 months | 
| Change from baseline at months 6, 12, 18 and 24 in visual acuity | Visual acuity will be measured using a Early Treatment Diabetic Retinopathy Study (ETDRS) chart. The ETDRS letter score is based on the number of letters correctly identified from specified distances. Higher scores correspond to better visual acuity. | At Months 6, 12, 18 and 24 | 
| Change from baseline at months 6, 12, 18 and 24 in intra-ocular pressure | Intraocular pressure will be measured by tonometry for each eye side. | At Months 6, 12, 18 and 24 | 
| Number of participants with and without opacity | A slit lamp examination with Lens Opacities Classification System III (LOCS III) will be used to assess lens opacities. The number of patients with and without opacity will be provided | At Months 6, 12, 18 and 24 | 
| Number of participants with and without abnormality in the fundus occuli | The number of patients with and without abnormalities in the fundus oculi will be provided | At Months 6, 12, 18 and 24 | 
| Percentage of participants who interrupt due to reaching target SF ≤ 100 μg/L and re-initiate therapy when ≥ 300 μg/L | Percentage of participants who interrupt deferasirox FCT at least once due to SF level ≤ 100 μg/L and the re-initiate therapy at SF level ≥ 300 μg/L | Up to 24 months | 
| Time to response (TTR) | TTR defined as the time from the date of randomization to the date of the first time the SF is achieving a value ≤ 100 μg/L during the treatment phase | Up to 24 months | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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hereditary hemochromatosis, ICL670, deferasirox FCT, iron overload