Blood-clot prevention with REGN7508 and REGN9933 in people with PICC lines
Official title: A Master Protocol for a Phase 3, Multicenter, Randomized, Double-Blind, Placebo-Controlled Study to Evaluate the Efficacy and Safety of REGN7508 and REGN9933, Monoclonal Antibodies Against Factor XI, for Prophylaxis of Venous Thromboembolism in Participants With a Peripherally Inserted Central Catheter (PICC) (ROXI-PEAK)
Run by Regeneron Pharmaceuticals · NCT07697599 · Data updated 2026-11-12
This study tests whether REGN7508 and REGN9933 can help prevent blood clots in people who have a PICC line.
Quick facts
| Phase | Phase 3 |
|---|---|
| Study type | Interventional |
| Ages | 15 Years and up |
| Sex | All |
| Enrollment | 1908 (estimated) |
| Sponsor | Regeneron Pharmaceuticals Industry-sponsored |
| Drugs / interventions | chemotherapy |
| Locations | 1 site (Tbilisi) |
| Status | Recruiting |
| Started | September 7, 2026 |
| Main results expected | June 25, 2029 |
| Study ends | September 18, 2029 |
| Registry record updated | September 29, 2026 |
| Trial ID | NCT07697599 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates are patients requiring PICC with no history of arm/ipsilateral central vein thrombosis and meeting the protocol’s performance and lab criteria.
✕Probably not a fit
Patients with certain cancers, brain tumors, unresected GI/GU malignancies, or other excluded conditions may not benefit and could be at higher risk for adverse effects.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This is a Phase 3 interventional trial evaluating two experimental drugs, REGN7508 and REGN9933, against placebo for venous thromboembolism prevention after PICC placement. Participants include adults and adolescents receiving IV treatments through a PICC. The study will assess efficacy in preventing clots, safety, drug levels over time, anti-drug antibodies, and potential bleeding risks. Investigators will monitor side effects and overall tolerability to determine if the regimens offer a meaningful benefit over placebo.
Why it matters
Potential benefit: If successful, participants could have a lower risk of PICC-related blood clots.
How similar studies have gone: Earlier studies with similar anticoagulation approaches have shown potential in reducing clot risk in high-risk catheter patients, but this specific combination is novel.
Who can join: the full rules
Show full inclusion / exclusion criteria
Key Inclusion Criteria: 1. Is undergoing PICC placement for Intravenous (IV) administration of clinically indicated medications, including chemotherapy, antibiotics, TPN, and/or other indications as described in the protocol 2. Has Eastern Cooperative Oncology Group Performance (ECOG) Status ≤3 or equivalent functional status as described in the protocol 3. Has International Normalization Ratio (INR) and aPTT values no more than 25% above the upper limit as described in the protocol 4. Weighs at least 40 kg during the screening period Key Exclusion Criteria: 1. Has a history of prior venous thrombosis in the arm and/or ipsilateral thoracic central veins in which the PICC is to be placed 2. Has acute leukemia, myelodysplastic syndrome, or primary and secondary myelofibrosis 3. Has unresected luminal gastrointestinal (GI) (including esophageal) or unresected genitourinary (GU) malignancy 4. Has current or history of known brain tumors or brain metastases 5. Has any major cardiovascular event within approximately the past 30 days prior to study administration 6. Pre-existing central venous catheter or indwelling spinal or epidural catheter during the screening period Note: Other Protocol Defined Inclusion/ Exclusion Criteria Apply
Where it's running
-
Arensia Exploratory Medicine at the Research Institute of Clinical Medicine
Tbilisi, Georgia Recruiting
Study contacts
- Study coordinator: Clinical Trials Administrator
- Email: clinicaltrials@regeneron.com
- Phone: 844-734-6643
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.