A Phase - IIa - IIb, Trial to Study the Safety, Tolerability and Efficacy of Memantine as a Long-term Treatment of SCD (MeMAGEN)
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|ClinicalTrials.gov Identifier: NCT03247218|
Recruitment Status : Not yet recruiting
First Posted : August 11, 2017
Last Update Posted : August 22, 2017
Symptomatic sickle cell disease (SCD) is worldwide the most frequent cause for hereditary hemolytic anemia with recurrent pain crises. Hemolysis, vaso- occlusive and pain crises are hallmarks of this disease and are causative for an important socio-economic burden worldwide, especially in Africa.
Aside from allogenic stem cell transplantation, which is rarely available and very expensive, at present there is no curative treatment for patients with SCD. The current standard of care includes treatment with Hydroxyurea and symptomatic care such as transfusions, antibiotic/analgesic treatment. Recent findings allowed the investigators to come up with a novel pharmacological target for prophylactic treatment of this group of patients. The investigators showed that N-methyl D-aspartate receptors (NMDARs) are substantially up-regulated in circulating red blood cells (RBCs) of SCD patients. Ca2+ uptake via these non-selective cation channels has major impact on RBC hydration and facilitates polymerization of deoxygenated hemoglobin S variant in RBCs of patients. In vitro observations shows that inhibition of NMDARs with Memantine caused re-hydration and largely prevented hypoxia-induced sickling in RBCs. A pilot trial MemSID (NCT02615847) was conducted in August 2015-March 2017 at the Hematology Division of University Hospital Zurich. A small cohort of adult SCD patients was treated with 20 mg Memantine daily to test safety, tolerability and efficacy of this drug and to assess the effect of Memantine on hemolytic activity and RBC stability. Pilot data reveal safety and an impressive therapeutic potential of Memantine in treating SCD patients. Due to a small number of SCD patients in Switzerland, an extended trial including larger number of adult and adolescent patients will be performed at the Pediatric Hematology Unit of the Emek Medical Center in Afula, Israel
|Condition or disease||Intervention/treatment||Phase|
|Sickle Cell Disease||Drug: Memantine Hydrochloride||Phase 2|
Show Detailed Description
|Study Type :||Interventional (Clinical Trial)|
|Estimated Enrollment :||40 participants|
|Intervention Model:||Single Group Assignment|
|Intervention Model Description:||a single center and open label study|
|Masking:||None (Open Label)|
|Official Title:||A Phase - IIa - IIb, Open Label, Single Center Trial to Study the Safety, Tolerability and Efficacy of Memantine Teva® as Supportive Long-term Treatment in Symptomatic Sickle Cell Disease|
|Estimated Study Start Date :||January 1, 2018|
|Estimated Primary Completion Date :||December 1, 2019|
|Estimated Study Completion Date :||June 30, 2020|
Experimental: Single group of patients
In this study 40 patients with SCD will be included. Twenty patients aged 18 years or older (cohort 1) and twenty patients 10 - 17 years old (cohort 2).
All the patients will receive Memantine Teva® film-coated tablets (Memantine hydrochloride) produced by Teva Pharma AG and will be provided as 5 mg, 10 mg, and 20 mg tablets packed in blister.
The study drug will be taken once a day per os, during one year.
Drug: Memantine Hydrochloride
a low-moderate affinity, uncompetitive, NMDAR antagonist
Other Name: Memantine TEVA
- Assessment of Incidence and severity of Memantine treatment-related Adverse Events (AE), including clinically significant abnormal laboratory values in adult and adolescent patients with symptomatic SCD. [ Time Frame: one year ]
The following laboratory parameters will be assessed and evaluated:
- Complete blood count.
- Hemolytic activity (reticulocytes, indirect bilirubin and LDH).
- Iron status (ferritin, serum iron, transferrin and transferrin saturation).
- Fetal hemoglobin levels
- Red cell volume, density, membrane stability, adherablilty, inflammatory markers and metabolic activity.
- Assessment of Clinical Improvement during Memantine treatment compared to a pre-screening data obtained from patients clinical files in adult and adolescent patients with symptomatic SCD. [ Time Frame: one year ]
Clinical improvements will be assessed by
- Number of hospital days.
- Number of emergency consultations
- Impact on working ability (the number of days with inability to work)
- The amount and type of analgesic medication received by the patient.
- The amount of RBC transfusions received by the patient.
- The number of days that antibiotics were prescribed.
- A questionnaire on quality of life.
- Evaluation of Cognitive function.
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT03247218
|Contact: Ariel Koren, Professor||9726495615 ext firstname.lastname@example.org|
|Contact: Anna H Shuman, B.sc||9726494044 ext email@example.com|
|Principal Investigator:||Ariel Koren, Professor||Emek Medical Center|