← Back to Clinical Trials
Recruiting Phase 2 NCT04899908

NCT04899908 Stereotactic Brain-directed Radiation With or Without Aguix Gadolinium-Based Nanoparticles in Brain Metastases

◆ AI Clinical Summary
Plain-language summary for patients
Clinical Trial Summary
NCT ID NCT04899908
Status Recruiting
Phase Phase 2
Sponsor Brigham and Women's Hospital
Condition Brain Cancer
Study Type INTERVENTIONAL
Enrollment 134 participants
Start Date 2021-09-15
Primary Completion 2028-04

Eligibility & Interventions

Sex All sexes
Min Age 18 Years
Max Age N/A
Study Type INTERVENTIONAL
Interventions
Stereotactic RadiationAGuIX gadolinium-based nanoparticlesPlacebo

Eligibility Fast-Check

Enter your details for a quick preliminary check. This does not replace medical advice.

What to Expect as a Participant

You will actively receive the study intervention — which may be a drug, biologic, device, or procedure.

In Phase 2, researchers evaluate early signs of effectiveness. You may be randomized to receive the active treatment or a comparator. Monitoring continues closely.

This trial targets 134 participants in total. It began in 2021-09-15 with a primary completion date of 2028-04.

⚠ This information is for research awareness only. Always consult your physician before joining any clinical trial. Participation is voluntary and you may withdraw at any time.

Brief Summary

The purpose of this study is to determine whether AGuIX (Activation and Guidance of Irradiation by X-ray) gadolinium-based nanoparticles make radiation work more effectively in the treatment of patients with brain metastases that are more difficult to control with stereotactic radiation alone.

Eligibility Criteria

Inclusion Criteria: * Participants must have a biopsy proven solid malignancy and at least one intracranial measurable lesion spanning ≥5mm in maximal unidimensional size and radiographically consistent with or pathologically proven to be a brain metastasis AND meet one of the following additional criteria regarding the primary site or nature of the intracranial disease: * Melanoma with intracranial growth consistent with tumor progression despite immunotherapy * Gastrointestinal primary * HER2 positive breast cancer (subtype assessed using most representative tissue available in opinion of enrolling clinician and/or study PI) * Cystic metastases * Metastases ≥2cm in maximal unidimensional size * Locally recurrent metastases after prior stereotactic radiation * Locally recurrent metastases after prior whole brain radiation \*Patients with metastases from melanoma, GI primaries, or HER2+ breast cancer, as well as those with cystic metastases or metastases ≥2cm in maximal unidimensional size, who have local recurrences after prior brain-directed radiation can only be treated in the strata permitting prior radiation (last two strata above) * Age ≥18 years at diagnosis of brain metastases * Estimated glomerular filtration rate of ≥ 60 mL/min/1.73m2 * Karnofsky performance status of at least 70 (i.e. at minimum, "cares for self" but "unable to carry on normal activity or do active work") * Estimated survival based on extracranial disease of at least 3 months in the opinion of the enrolling clinician and/or study PI * Ability to understand and the willingness to sign a written informed consent document * The effects of AGuIX on the developing human fetus are unknown. For this reason, women of child-bearing potential must agree to use adequate contraception prior to study entry and for the duration of the therapeutic component of study participation Exclusion Criteria: * Participants who cannot undergo a brain MRI * Participants who cannot receive gadolinium * Participants with widespread, definitive leptomeningeal disease * Patients requiring radiation to either \>10 targets (if naïve to whole brain radiation) or \>20 targets (if whole brain radiation has been given previously) per the discretion of the treating clinician and/or study PI * Pregnant women are excluded from this study because of the potential deleterious effects of gadolinium on the developing fetus. Because there is an unknown but potential risk for adverse events in nursing infants, women who are breastfeeding are not eligible for this study * In cohorts who have received prior brain-directed radiation, patients are not eligible for this study if they have active (at the time of protocol screening) brain metastases that require radiation that are in or within 1.0cm of the brainstem, eyes, optic nerves, or optic chiasm if the juxtaposed organ at risk (i.e. brainstem, eyes, optic nerves, or optic chiasm) has previously received either \>6.0 Gy in a single fraction or, if prior radiation was fractionated, a cumulative dose in 2.0 Gy equivalents, using an alpha/beta ratio of 2, of \>40.0 Gy. In addition, all patients who have had prior brain-directed radiation, regardless of technique/dose/fractionation, are not eligible for the study until written approval is provided by the study/site PI

Contact & Investigator

Central Contact

Ayal Aizer, MD, MHS

✉ aaaizer@partners.org

📞 (617) 732-7560

Principal Investigator

Ayal Aizer, MD, MHS

PRINCIPAL INVESTIGATOR

Brigham and Women's Hospital

Frequently Asked Questions

Who can join the NCT04899908 clinical trial?

This trial is open to participants of all sexes, aged 18 Years or older, studying Brain Cancer. Full inclusion and exclusion criteria are listed in the Eligibility Criteria section. Always confirm your eligibility with the research team before applying.

What phase is the NCT04899908 trial and what does that mean for participants?

Phase 2 trials evaluate whether the treatment shows signs of effectiveness while continuing to monitor safety. More participants are enrolled than in Phase 1 to help refine the treatment protocol.

Is NCT04899908 currently recruiting?

Yes, NCT04899908 is actively recruiting participants. Contact the research team at aaaizer@partners.org for enrollment information.

Where is the NCT04899908 trial being conducted?

This trial is being conducted at Boston, United States, Boston, United States.

Who is sponsoring the NCT04899908 clinical trial?

NCT04899908 is sponsored by Brigham and Women's Hospital. The principal investigator is Ayal Aizer, MD, MHS at Brigham and Women's Hospital. The trial plans to enroll 134 participants.

Related Trials

Related Intelligence Guides

In-depth guides covering this condition's trials, eligibility, and what to expect.

ClinicalMetric — Independent clinical trial intelligence platform. Not affiliated with NIH, ClinicalTrials.gov, the U.S. FDA, or any pharmaceutical company, hospital, or clinical research organization. Trial data is sourced from ClinicalTrials.gov for informational purposes only and does not constitute medical advice. Do not make any treatment, enrollment, or health decisions based solely on information found here — always consult a qualified healthcare professional. Full Disclaimer  ·  Last Reviewed: April 2026  ·  Data Methodology