A Single-Arm, Open-Label Phase Ia/Ib Clinical Trial Evaluating the Safety, Tolerability, Pharmaco… (NCT07593144) | Clinical Trial Compass
Not Yet RecruitingPhase 1
A Single-Arm, Open-Label Phase Ia/Ib Clinical Trial Evaluating the Safety, Tolerability, Pharmacokinetic Profile, and Preliminary Efficacy of FS-207 in Patients With Advanced Solid Tumors With High Microsatellite Instability (MSI-H)
China156 participantsStarted 2026-05-15
Plain-language summary
This is a Phase Ia/Ib clinical study of FS-207, an investigational oral tablet, in patients with advanced solid tumors that are microsatellite instability-high, also called MSI-H. MSI-H tumors have specific changes in DNA repair pathways and may depend on the WRN protein to survive. FS-207 is designed to inhibit WRN.
The main purpose of this study is to evaluate the safety and tolerability of FS-207 and to understand how the drug moves through the body. The study will also look for early signs of anti-tumor activity.
This study has two parts. In the first part, called dose escalation, small groups of patients will receive increasing dose levels of FS-207 to help identify a safe and appropriate dose for further study. In the second part, called dose expansion, additional patients with selected MSI-H advanced solid tumors will receive FS-207 at dose level(s) chosen based on the earlier safety and clinical data.
Participants will take FS-207 orally once daily. Study doctors will monitor participants closely through physical examinations, blood and urine tests, electrocardiograms, heart function tests, imaging scans, and blood samples for pharmacokinetic testing. Tumor assessments will be performed regularly to evaluate whether the cancer has responded to treatment, remained stable, or progressed.
This is an open-label study, which means that both the participants and study doctors will know that FS-207 is being given. There is no placebo group in this study.
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:
* 1\) Male or female patients aged ≥18 years at the time of signing the Informed Consent Form; 2) Patients with histologically or cytologically confirmed locally advanced or metastatic solid tumors, whose disease has progressed or who have experienced intolerable toxicity following prior standard therapy. Additionally, participants must meet the following criterion: they have previously received treatment with at least one immune checkpoint inhibitor (ICI), and this treatment was deemed a failure due to disease progression or was discontinued due to intolerable toxicity; 3) Participants must provide a test report confirming a positive MSI-H/dMMR status in their tumor tissue; 4) Eastern Cooperative Oncology Group (ECOG) Performance Status score: 0-1; 5) Anticipated life expectancy of ≥3 months; 6) Presence of at least one measurable lesion (according to RECIST v1.1 criteria, a measurable lesion is defined as a non-lymph node lesion with a longest diameter of ≥10 mm, or a lymph node lesion with a short axis of ≥15 mm, as measured by CT or MRI); 7) Female or male participants of childbearing potential must agree not to conceive, donate ova, or donate sperm from the date of signing the Informed Consent Form until 3 months after the last treatment administered in the study; furthermore, during this period, they must agree to utilize effective contraception (including one or more non-pharmacological contraceptive methods) or safety measures; 9) Agrees to comply…
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
Number of Participants with a Dose Limiting Toxicity (DLT)
Timeframe: Up to 21 days
2
Number of Participants with Treatment-emergent Adverse Events (TEAEs) and Serious Adverse Events (SAEs)