IRB Study Number 22-1374
Status Recruiting
Institute Taussig Cancer Institute
Description
1.1 Primary Objective
To determine the efficacy, as measured by the slope of change of the Cogstate composite Z score from baseline to 12 months, of oral memantine administered for a period of 6 months, when compared to placebo, in children ages 4-18 receiving cranial or craniospinal radiotherapy for primary central nervous system tumors.
1.2 Exploratory Objectives
1.2.1 To determine if memantine is associated with improved cognitive function as measured for participants in the optional COG Standardized Battery at 12 months.
1.2.2 To determine if memantine is associated with change in cognitive function vs. placebo as measured by Cogstate composite score at end of RT, 3 and 6 months.
1.2.3 To determine if memantine is associated with differences in cognitive function vs. placebo as measured by Cogstate composite score at 30 and 60 months for participants in the optional COG Standardized Battery.
1.2.4 To correlate early cognitive changes (end of RT, 3, 6, 12 months Cogstate composite score) with late cognitive function (30 and 60 months Cogstate composite score).
1.2.5 To correlate COG Standardized Battery scores to Cogstate composite scores at 12, 30, and 60 months.
1.2.6 To estimate the 36-month disease-free and overall survival (of primary brain tumor) after memantine treatment compared to placebo.
1.2.7 To correlate changes in quantitative volumetric MRI measurements of critical brain regions with cognitive function over time.
1.2.8 To evaluate impact of memantine versus placebo on molecular biomarkers associated with cognitive decline after radiotherapy.
1.2.9 To determine whether oral memantine, when compared to placebo, is associated with reduction in the incidence of decline of composite Cogstate score at 12 months in children ages 4-18 receiving cranial radiotherapy for primary central nervous system tumors.
Inclusion Criteria
3.2.1 Age
≥4 and <18 years at time of study entry
3.2.2 Weight
Patients must weigh 15 kg or greater at time of study entry.
3.2.3 Diagnosis
Newly diagnosed or recurrent primary brain tumors that have not received prior cranial radiotherapy.
3.2.4 Treatment Plan
Planned focal, cranial or craniospinal radiation treatment for a primary brain tumor.
Reminder: See Section 3.1.4 for timing requirements.
3.2.5 Language
The patient must have receptive and expressive language skills in English, French or Spanish since the neurocognitive function and QOL assessment instruments are available in these languages only.
3.2.6 Organ Function Requirements
3.2.6.1 Adequate renal function defined as:
Creatinine clearance or radioisotope GFR ≥ 70 mL/min/1.73 m2 or
A serum creatinine based on age/gender as follows: (See protocol)
3.2.6.2 Adequate liver function defined as:
Total bilirubin ≤ 1.5 x upper limit of normal (ULN) for age, and
SGPT (ALT) ≤ 135 U/L*
* Note: For the purpose of this study, the ULN for SGPT (ALT) has been set to the value of 45 U/L
3.2.7 The patient must be able to undergo Magnetic Resonance Imaging.
Exclusion Criteria
3.2.8 Life expectancy of less than 18 months
3.2.9 Pre-existing conditions
3.2.9.1 Any contraindication or allergy to memantine.
3.2.9.2 Intractable seizures while on adequate anticonvulsant therapy, defined as more than one seizure per month for the past 2 months or since initiating anticonvulsant therapy.
3.2.9.3 Co-morbid systemic illnesses, psychiatric conditions, social situations, or other severe concurrent disease which, in the judgment of the investigator, would make the patient inappropriate for entry into this study or interfere significantly with the proper assessment of safety and toxicity of the prescribed regimens or would limit compliance with the study requirements.
3.2.9.4 Patients with a motor, visual, or auditory condition that precludes computerized neurocognitive assessments are not eligible to participate.
3.2.9.5 Patients with any medical condition or taking medications that lead to alterations of urine pH towards the alkaline condition (e.g., renal tubular acidosis, carbonic anhydrase inhibitors, sodium bicarbonate).
3.2.10 Personal history of prior cranial or craniospinal radiotherapy is not allowed.
Note: Prior anti-cancer therapy including surgery, chemotherapy, targeted agents are allowed as per standard of care clinical treatment guidelines. Please see Section 4.1 for the concomitant therapy restrictions for patients during treatment.
3.2.11 Pregnancy and Breastfeeding
3.2.11.1 Female patients who are pregnant are excluded since fetal toxicities and teratogenic effects have been noted for the study drug. A pregnancy test is required for female patients of childbearing potential.
3.2.11.2 Lactating females who plan to breastfeed their infants.
3.2.11.3 Sexually active patients of reproductive potential who do not agree to use an effective contraceptive method for the duration of their study participation.
