NCT02993146

Ropidoxuridine and Whole Brain Radiation Therapy in Treating Patients With Brain Metastases

Phase 1 and Pharmacology Study of Oral 5-Iodo-2-Pyrimidinone-2-Deoxyribose (IPdR) as a Prodrug for IUdR-Mediated Tumor Radiosensitization in Brain Metastases

• Status: Active Not Recruiting
• Phase: Phase 1
• Study type: Interventional
• Enrollment: 11 (actual)
• Sponsor: National Cancer Institute (NCI) · NIH
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

This phase I trial studies the side effects and best dose of ropidoxuridine when given together with whole brain radiation therapy in treating patients with cancer that has spread to the brain (brain metastases). Ropidoxuridine may help whole brain radiation therapy work better by making cancer cells more sensitive to the radiation therapy.

Detailed description

PRIMARY OBJECTIVE: I. To conduct a phase 1 dose escalation trial in patients with brain metastases to determine the recommended phase -2 dose of ropidoxuridine (5-iodo-2-pyrimidinone-2'-deoxyribose \[IPdR\]) when administered alone orally once daily for 7 consecutive days and then concurrently with conventionally fractionated whole brain radiation therapy (WBRT) for additional 21 days. SECONDARY OBJECTIVES: I. To observe and record anti-tumor activity to IPdR-mediated radiosensitization. II. To estimate 6 month intracranial progression-free survival (PFS) in brain metastasis cancer patients who receive daily oral IPdR x 28 days and WBRT. III. To establish the pharmacokinetics of daily oral dosing of IPdR times 8 days. IV. To evaluate safety and tolerability of oral IPdR x 28 days and WBRT. V. To estimate the incidence of delayed neurological toxicity at 2, 4, and 6 months (+/-1 week) post-completion of WBRT (for patients without intracranial progression) including: Va. Delayed-recall through Hopkins Verbal Learning Test Revised (HVLT-R). Vb. Quality of life as measured by the Functional Assessment of Cancer Therapy-Brain (FACT-BR). CORRELATIVE OBJECTIVES: I. To assess for biochemical evidence of IPdR effect in normal tissues (circulating granulocytes) by measuring %IUdR-deoxyribonucleic acid (DNA) cellular incorporation by flow cytometry and high-pressure liquid chromatography (HPLC) analyses as an exploratory biomarker for the following: Ia. %IUdR-DNA tumor cell incorporation from day 8 extracranial tumor biopsies in brain metastasis cancer patients receiving RP2D doses of IPdR as an exploratory biomarker of tumor radiosensitization using Response Evaluation Criteria in Solid Tumors (RECIST) criteria. Ib. %IUdR-DNA cellular incorporation in patients' circulating granulocytes taken weekly during the 28-day IPdR RP2D dose, on day 29, and week 8 as an exploratory biomarker of IPdR systemic toxicities to bone marrow as measured by serial complete blood count (CBC)/differential values. OUTLINE: This is a dose escalation study of ropidoxuridine. Patients receive ropidoxuridine orally (PO) once daily (QD) on days 1-28 and undergo WBRT daily for not more than 5 days per week beginning on day 8 for a total of 15 fractions in the absence of disease progression or unacceptable toxicity. After completion of study treatment, patients are followed up every 2 months for 6 months, every 3-4 months for 6 months, and every 6 months for 1 year.

Conditions

• Hematopoietic and Lymphoid Cell Neoplasm
• Malignant Solid Neoplasm
• Metastatic Malignant Neoplasm in the Brain

Interventions

Type	Name	Description
OTHER	Laboratory Biomarker Analysis	Correlative studies
OTHER	Pharmacological Study	Correlative studies
OTHER	Quality-of-Life Assessment	Ancillary studies
DRUG	Ropidoxuridine	Given PO
RADIATION	Whole-Brain Radiotherapy	Undergo WBRT

Timeline

• Start date: 2017-05-08
• Primary completion: 2022-08-19
• Completion: 2026-10-03
• First posted: 2016-12-15
• Last updated: 2025-10-29
• Results posted: 2024-02-20

Locations

14 sites across 1 country: United States

Regulatory

• FDA-regulated drug study