Evaluation of Ascorbate-Meglumine Therapeutic for SRS
Phase 1, Single-Center, Dose-Escalating, Open-Label, Safety Clinical Trial of Parenteral Ascorbate-Meglumine as a Novel Magnetic Resonance Imaging (MRI)-guided Adjunctive Therapeutic for Stereotactic Radiosurgery (SRS)
Inclusion Criteria
- Primary cancer diagnosis with newly diagnosed brain metastases
- Diagnostic MRI demonstrates the presence of 1 to 3 intact (not previously irradiated or resected) brain metastases.
- Maximum tumor diameter ≤ 2.5 cm for the largest lesion determined during the planning MRI
- Plan of care must include Stereotactic Radiosurgery (SRS)
- SRS treatment plan must be delivered as a single RT fraction
- Age 18 years and older
- Life expectancy of at least 3 months
- GPA score 0.5 or greater
- Capable of providing written informed consent to participate in the study
Exclusion Criteria
- Primary lesion with radiosensitive histology (i.e., small cell carcinoma, germ-cell tumors, lymphoma, leukemia, and multiple myeloma)
- Metastases in the brain stem, pons or medulla or within 3 mm of the optic apparatus (such that some portion of the optic nerve or chiasm would receive a radiation dose > 10 Gy SRS in one single fraction)
- Previous whole-brain radiation (previous SRS to or resection of other brain lesions is permitted if more than 3 months prior to the date of enrollment on this protocol)
- Pregnancy
- History or manifestation of glucose-6-phosphate dehydrogenase (G6PD) enzyme deficiency
- History of oxalate kidney stones
- History of iron overload or hemochromatosis
- History of allergy to ascorbic acid
- Anuria, dehydration, serum albumin <3.0 g/dL, severe pulmonary congestion or pulmonary edema or fixed low cardiac input since all are conditions for which osmotic diuresis are contraindicated .
- Subjects who are on the following drugs and cannot have a drug substitution: flecainide, methadone, amphetamines, quinidine, and chlorpropamide.
- Subjects who are on strong inducers, inhibitors or substrates of CYP within 3 days of planned administration of study ascorbate-meglumine.
- Subjects for which MRI is contra-indicated (for example a pacemaker/recent surgery with orthopedic prosthesis)
Study sponsor and potential other locations can be found on ClinicalTrials.gov for NCT06433791.
Locations matching your search criteria
United States
North Carolina
Durham
Phase 1, single-center, open-label study in subjects receiving Stereotactic Radiosurgery
(SRS) for brain metastases. The study will consist of 4 principal cohorts (n=3 in each
cohort). Each cohort will receive an escalating dose of ascorbate-meglumine as an
Magnetic Resonance Imaging (MRI)-detectable adjunctive therapeutic to SRS.
Subjects will complete a planning MRI for SRS with gadolinium- diethylenetriamine
penta-acetic acid (GD-DPTA) per standard of care for SRS. Forty-eight hours after the
planning MRI, the subjects will complete the study MRI with ascorbate-meglumine contrast
agent. Each cohort will receive an escalating dose of ascorbate-meglumine by intravenous
administration over 1 hour during the MRI. The total dose of ascorbate-meglumine will
escalate from the first cohort to the next cohort in a sequential manner. During
ascorbate-meglumine infusion, MRI scans will be performed to evaluate the contrast effect
and PK blood draws will occur at defined time points.
Patients will return for the SRS procedure within 1 week following the planning MRI per
standard of care. During SRS, subjects will receive a second dose of ascorbate-meglumine
as an adjunctive therapeutic.
Patients will enter into a follow up phase within 2 weeks after the SRS procedure per
standard of care.
The primary endpoint is to evaluate the safety of parenteral ascorbate-meglumine as a
MRI-detectable adjunctive therapeutic to SRS.
Trial PhasePhase I
Trial Typetreatment
Lead OrganizationLadeRx LLC
Principal InvestigatorJohn Paxton Kirkpatrick
- Primary IDLadeRX
- Secondary IDsNCI-2024-07499
- ClinicalTrials.gov IDNCT06433791