Phase 1 Study of WBRT or PCSI With REYOBIQ for Leptomeningeal Metastases

Official title

A Phase 1 Study to Determine the Safety and Tolerability of Whole Brain Radiotherapy (WBRT) or Proton Craniospinal Irradiation (PCSI) With Multiple Doses of Rhenium-186 NanoLiposome (186RNL, REYOBIQ) Administered Via Intraventricular Catheter for Leptomeningeal Metastases

Overview

This Phase 1 study is designed to assess the safety, tolerability, and schedule feasibility of administering Rhenium-186 NanoLiposome (REYOBIQ) at different dosing intervals following whole brain radiotherapy (WBRT) or proton craniospinal irradiation (PCSI).

Interventions

• Drug 186RNL
  Intraventricular injection via catheter. Patients will be assigned to three separate dosing schedules and once assigned they will remain on that dose level for up to 12 months (6 doses). Each dose will be 26.4 mCi, and participants will receive three doses for a total of 79.2 mCi. The time between doses will vary depending on the schedule (shown in table 1): * Schedule 1: Every 56 days * Schedule 2: Every 28 days * Schedule 3: Every 14 days

Primary outcome measures

• Incidence of Dose-Limiting Toxicities (DLTs) [Time frame: Up to Month 13 (28 Days Post-Final Dose)]

Secondary outcome measures (4)

• Central Nervous System Progression-Free Survival (CNS PFS) [Time frame: Up to Year 5]
• Overall Survival (OS) [Time frame: Up to Year 5]
• Overall Response Rate (ORR) [Time frame: Up to Year 5]
• Duration of Response (DoR) [Time frame: Up to Year 5]

Eligibility criteria

Inclusion criteria

• At least 18 years of age at screening
• Ability to understand the purposes and risks of the study and has signed a written informed consent document approved by the site-specific IRB
• Proven and documented LM evidenced by positive CSF cytology or CSF circulating tumor cells, from any primary solid tumor
• Patients may have received prior chemotherapy regimens and prior radiation (there is no limit)
• Karnofsky performance status of 60 to 100
• Acceptable liver function:

• Bilirubin ≤ 1.5 times upper limit of normal
• AST (SGOT) and ALT (SGPT) ≤ 3.0 times upper limit of normal for subjects with normal liver
• AST (SGOT) and ALT (SGPT) ≤ 5.0 times upper limit of normal for subjects with liver metastasis
• Subjects with a creatinine clearance greater than or equal to 60 mL/min (using the Cockcroft-Gault Equation) for males and females.
• Acceptable hematologic status (without hematologic support):

• ANC ≥ 1000 cells μL
• Platelet count ≥ 75,000/μL
• Hemoglobin ≥ 9.0 g/dL
• PT/INR and PTT ≤1.5 x ULN, unless treated with anticoagulants
• All women of childbearing potential must have a negative serum pregnancy test at screening. Male and female subjects must agree to use effective means of contraception (for example, surgical sterilization or the use of barrier contraception with either a condom or diaphragm in conjunction with spermicidal gel or an IUD) with their partner from entry into the study through 6 months after the last dose.

Exclusion criteria

• The subject has not recovered to National Cancer Institute (NCI) Common Terminology Criteria for Adverse Events (CTCAE v6.0) Grade ≤ 1 from AEs due to antineoplastic agents, investigational drugs, or other medications that were administered prior to study. Prior AEs due to alopecia, anemia, and lymphopenia are not required to be recovered to Grade ≤ 1 prior to 186RNL treatment, assuming other inclusion criteria are satisfied.
• Ventriculo-peritoneal or ventriculo-atrial shunts or contraindications to placement of Ommaya reservoir.
• Females of childbearing potential who are pregnant, breast feeding, or may possibly be pregnant without a negative serum pregnancy test (see inclusion criteria).
• Serious intercurrent illness, clinically significant cardiac arrhythmias, uncontrolled systemic infection, symptomatic congestive heart failure or unstable angina pectoris within 3 months prior study drug, myocardial infarction, stroke, transient ischemic attack within 6 months, seizure disorder with any seizure occurring within 14 days prior to consenting or encephalopathy.
• Active severe non hematologic organ dysfunction such as renal, cardiac, hepatic, pulmonary, or gastrointestinal grade 3 or above.
• Toxicity from prior treatments (grade 3 or above) that have not subsided to grade 1.
• Patients with prior CNS directed EBRT.
• Cytotoxic systemic therapy is excluded if given within 14 days or 5 half-lives, whichever is shorter, prior to 186RNL treatment. Small-molecule kinase inhibitors, targeted therapies, immunotherapy, and hormonal therapy can be given up to the day of treatment per investigator discretion.
• Projected survival of less than 60 days.

Criteria are shown verbatim from the registry (in English). Final eligibility is always assessed by the study center.

Healthy volunteers: No

Study design

Allocation

N/A

Model

Single group

Masking

Open label

Primary purpose

Treatment

Study locations

Center list to be confirmed — check the primary protocol.

Identifiers

NCT: NCT07674693 · 25-01308

Primary sources (government registries)

• ClinicalTrials.gov (US NIH)

View this study on ClinicalTrials.gov ↗