Conditions: Brain Tumor
Keywords: Patients with brain tumors associated with seizures
Allocation: NA | Intervention model: SINGLE_GROUP
Enrollment: 9
Healthy volunteers: no

Brief summary:
The main purpose of this part of the study is to determine the Central Nervous System bioavailability of sulfasalazine.

Detailed description:
This is a pilot, open-label, non-randomized, study to determine the effect that orally administered sulfasalazine has on glutamate levels as measured by MRS and on epileptiform spiking as measured by simultaneous MEG/EEG. The intent of the dose escalation is to determine an Optimal Biological Dose (OBD) based on changes in tumor glutamate levels. The OBD is defined as the dose that has the maximal reduction in tumor glutamate levels after normalization to uninvolved brain.

Arms:
arm 1: None

Interventions: intervention 1: Sulfasalazine
Intervention descriptions: intervention 1: Sulfasalazine has been the parent aminosalicylate in use for over 40 years in the treatment of inflammatory bowel disease. The drug is a conjugate of sulfapyridine linked to 5-aminosalicylic acid. In inflammatory bowel disease, the 5-ASA component is the active moiety

Sulfasalazine is a prodrug that consists of sulfapyridine bonded to mesalamine (5-ASA). Sulfasalazine is cleaved by colonic bacterial azo-reductases into sulfapyridine and the 5-ASA moiety. 5-ASA is metabolized to N-acetyl-5-ASA by an enzyme in the intestinal epithelium and the liver and then excreted in the urine as a mixture of free 5ASA and N-acetyl-5-ASA.

Protocol document: