The primary efficacy endpoint of this interventional study was to evaluate the number of patients achieving a complete response (CR), defined as patients switching from intensive deferasirox -DFO treatment, at any time point during the 24 months of study, to deferasirox monotherapy based on improvement in the cardiac magnetic resonance imaging (MRI) T2\* value to \>10ms, and continue to maintain their MRI T2\* to values \>10 msec.
This study was planned to recruit 52 transfusion-dependent β-thalassemia patients with severe cardiac iron overload. However only 13 patients participated in the study during a 3 year and 5 month timeframe. The study was terminated due to the slow enrollment rate due to scarcity of the patient population with severe cardiac iron overload.
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
TREATMENT
Masking
NONE
Enrollment
32
20-40 mg/kg/day orally, once daily
40 mg/kg/day subcutaneous (sc) infusion, 3-4 days per week
Novartis Investigative Site
Athens, GR, Greece
Novartis Investigative Site
Athens, Greece
Novartis Investigative Site
Athens, Greece
Novartis Investigative Site
Pátrai, Greece
Number of Patients Achieving a Complete Response (CR)
Complete Response is defined as patients that stop intensive deferasirox -DFO treatment, at any time point during the 24 months of study, based on an improvement in the cardiac Magnetic Resonance Imaging T2 star technique (MRI T2\*) value being \>10ms, and continue to be treated with deferasirox monotherapy without any further need for reverting back to intensive iron chelation treatment during the 24 months of study.
Time frame: 24 months
Number of Patients Achieving a Partial Response (PR)
Partial Response is defined as patients that stop intensive deferasirox -DFO treatment at any time point during the 24 months study and transition to receive deferasirox monotherapy, but due to a deterioration in cardiac MRI T2\* to a value \< 10 ms revert back to intensive deferasirox -DFO iron chelation therapy during the 24 months of study.
Time frame: 24 months
Number of Patients With Stable Disease (SD)
Stable Disease is defined as those patients that never achieved an improvement in the cardiac MRI T2\* to values \>10ms during the 24 months of study.
Time frame: 24 months
Change From Baseline in Cardiac Iron Overload of Patients in Intensive Iron Chelation Therapy Consisting of Deferasirox-DFO and After Transition to Deferasirox Monotherapy
Cardiac iron overload was determined by cardiac MRI T2\*. Cardiac iron overload also was measured by the monthly velocity of heart MRI T2\*.
Time frame: Baseline, 6, 12, 18, 24 months
Time to Response
Time to response was defined as the time from baseline when the participant had severe cardiac iron overload to the time when the participant achieved mild/moderate cardiac overload (T2\*\>10 milliseconds \[ms\]).
Time frame: 24 months
Change From Baseline in Liver Iron Concentration (LIC)
Change from baseline in LIC was determined by change in liver MRI T2\*.
Time frame: Baseline, 6, 12, 18, 24 months
Correlation Between Change From Baseline in Serum Ferritin and LIC Levels
Spearman correlation coefficients between serum ferritin and LIC changes from baseline levels were reported.
Time frame: Baseline, 6, 12, 18, 24 months
Left Ventricular Ejection Fraction (LVEF)
LVEF % was measured by cardiac magnetic resonance (CMR).
Time frame: 6, 12, 18, 24 months
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