Testing the Effectiveness of the Anti-cancer Drug Pidnarulex (CX-5461), in Combination With Anoth… (NCT07147231) | Clinical Trial Compass
RecruitingPhase 1/2
Testing the Effectiveness of the Anti-cancer Drug Pidnarulex (CX-5461), in Combination With Another Anti-cancer Drug Cemiplimab (REGN2810), in Treating Refractory Microsatellite Stable Colorectal Cancer
United States86 participantsStarted 2026-12-21
Plain-language summary
This phase I/II trial studies the side effects and best dose of pidnarulex when given together with cemiplimab and to see how well it works in treating patients with microsatellite stable (MSS) colorectal cancer (CRC) that does not respond to treatment (refractory). Pidnarulex may stop the growth of tumor cells by blocking some of the enzymes needed for cell growth. Immunotherapy with monoclonal antibodies, such as cemiplimab, may help the body's immune system attack the cancer, and may interfere with the ability of tumor cells to grow and spread. Giving pidnarulex with cemiplimab may be safe, tolerable and/or effective in treating patients with refractory MSS CRC.
Who can participate
Age range
18 Years
Sex
ALL
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Inclusion Criteria:
* Patients must have pathologically confirmed colorectal adenocarcinoma that is unresectable and/or metastatic and for which standard curative or palliative measures do not exist or are no longer effective
* Patients must have measurable disease as defined by Response Evaluation Criteria in Solid Tumors (RECIST) version (v) 1.1
* Patients must have pathologically confirmed proficient mismatch repair proteins (pMMR) and/or not microsatellite-high status (non-MSI-H). This may be confirmed by local tissue testing of the primary tumor and/or any metastatic lesion utilizing approved immunohistochemistry (for mismatch repair status) and/or polymerase chain reaction or next generation sequencing (for microsatellite status) assays. Historical (i.e., previously obtained) biopsy mismatch repair (MMR) and microsatellite instability (MSI) status may be utilized. If historical tissue is available, MMR and/or MSI testing may be performed on that tissue if not done previously. Clinical documentation of the patient's MMR and/or MSI status in the medical record may also be utilized to determine MMR and/or MSI status for the purposes of eligibility. pMMR results for eligibility testing must be available prior to study enrollment and no eligibility testing will be conducted on study
* Phase 2 patients must have at least one liver metastasis at study entry (by imaging and/or histology, per investigator assessment); this metastasis does not need to be measurable
* Phase 2 pat…
Questions worth asking your doctor
Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.
1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?
Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.
Questions for the trial coordinator
The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.
1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?
A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.
What they're measuring
1
Recommended phase 2 dose (RP2D) of pidnarulex (CX-5461) with anti-programmed cell death protein 1 (anti-PD-1) (Phase 1)
Timeframe: Up to 28 days
2
Incidence of adverse events, serious adverse events, and dose limiting toxicities
Timeframe: Up to 30 days after last dose of study drug
3
Progression-free survival (PFS) (Phase II)
Timeframe: From randomization until disease progression (as assessed by Response Evaluation Criteria in Solid Tumors [RECIST] version [v] 1.1) or death from any cause, whichever occurs first, assessed up to 2 years