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RECRUITING Phase 1 / Phase 2 ClinicalTrials.gov

Biologic Association Between Metabolic Magnetic Resonance-positron Emission Tomograph (MR-PET) and Tissue Measures of Glycolysis in Brain Tumors of Infiltrating Glioblastoma Cells

Sponsor: Jonsson Comprehensive Cancer Center • ClinicalTrials.gov ID: NCT06059690

Registry updated: 2026-10-08
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Description

The purpose of this project is to validate a new combined MRI and PET imaging technique as a biomarker or measure of glycolysis in brain tumors. To accomplish this, the investigators propose obtaining image-guided measures of tissue pH and biopsied tissue in tumor areas selected for bulk resection surgery. Investigators will then correlate the imaging measurements with pH, RNA expression, protein expression, and bioenergetics measurements of key glycolytic enzymes.

Interventions

  • pH Measurement of in vivo tissue (Diagnostic test)
    The investigator will identify multiple (2-5) 5-8mm diameter spherical targets on GI maps for use in stereotactic pH measurement and biopsy acquisition. All biopsies are acquired for standard of care and according to standard of care procedures. A 13-gauge biopsy needle and plastic cannula will be inserted into the region of interest identified on MRI and PET. The biopsy needle will be removed, and the Softcell® pH probe, consisting of a 1.8mm diameter high quality glass tip and 1.6m long wire, will be guided down the cannula and inserted at least 15mm into the tissue. Recordings will be made for 1 minute to stabilize the reading, then the pH probe will be removed from the region of interest and placed into a saline vial for the next biopsy target. After the pH probe is removed, the biopsy needle will be placed into the cannula and standard-of-care biopsy tissue will be obtained from the same area where pH measurements were recorded.

Eligibility criteria

Inclusion Criteria: * Age \> 18 * Patients with newly diagnosed or recurrent glioblastoma clinically indicated for resective surgery Exclusion Criteria: * Patients who cannot obtain an MRI or FDG PET scan with contrast * Those with ferromagnetic implanted devices that might produce a safety hazard (e.g. infusion pumps, pace makers, aneurysm clips, etc.) will be excluded from the study along with subjects with severe claustrophobia or who have severely compromised renal function (GFR \< 30).

Conditions

Glioblastoma Multiforme Glycolytic Index Epidermal Growth Factor Receptor

Locations

  • University of California at Los Angeles — Los Angeles, California, United States
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Official Source

Data sourced from ClinicalTrials.gov, a service of the U.S. National Institutes of Health.

View Official Record