Research on Colorectal Cancer Recurrence Monitoring and Individualized Treatment Based on MRD
This study aims to evaluate whether plasma molecular residual disease (MRD), assessed using circulating tumor DNA (ctDNA), can help optimize the duration of immunotherapy in patients with metastatic microsatellite instability-high (MSI-H) or mismatch repair-deficient (dMMR) colorectal cancer.
Patients with MSI-H/dMMR metastatic colorectal cancer can achieve durable responses to immune checkpoint inhibitors, but the optimal duration of treatment remains uncertain. Prolonged immunotherapy may increase treatment burden and the risk of immune-related adverse events. ctDNA-based MRD testing may provide a sensitive method for detecting residual tumor burden and identifying patients who may be able to safely stop treatment.
In this study, patients receiving immunotherapy will undergo serial plasma MRD testing. After completing 1 year of immunotherapy, patients with two consecutive negative MRD results will be randomly assigned to either continue immunotherapy or stop treatment and enter observation. Patients will then be followed every 3 months for 2 years with MRD testing and routine clinical assessments, including imaging and laboratory examinations.
The study will compare clinical outcomes between the two groups and evaluate whether serial plasma MRD monitoring can support a more individualized approach to the duration of immunotherapy in MSI-H/dMMR metastatic colorectal cancer.
Studieoversigt
Status
Status
Betingelser
Betingelser
Intervention / Behandling
Intervention / Behandling
Undersøgelsestype
Undersøgelsestype
Tilmelding (Anslået)
Tilmelding
Fase
Fase
- Ikke anvendelig
Kontakter og lokationer
Studiekontakt
Studiekontakt
- Navn: Binyi Xiao, M.D
- Telefonnummer: +86-15800004780
- E-mail: xiaoby@sysucc.org.cn
Studiesteder
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Guangdong
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Guangzhou, Guangdong, Kina, 510060
- Rekruttering
- Sun Yat-sen University Cancer Center
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Kontakt:
- Binyi Xiao, M.D.
- Telefonnummer: +86-1580004780
- E-mail: xiaoby@sysucc.org.cn
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Deltagelseskriterier
Berettigelseskriterier
Berettigelseskriterier
Aldre berettiget til at studere
- Voksen
- Ældre voksen
Tager imod sunde frivillige
Beskrivelse
Inclusion Criteria:
- Voluntary participation in the study and provision of written informed consent.
- Age ≥18 years at the time of signing informed consent.
- Histologically confirmed colorectal adenocarcinoma with mismatch repair deficiency (dMMR) or microsatellite instability-high (MSI-H) status.
- Clinically confirmed stage IV disease.
- No prior immunotherapy for the current colorectal cancer.
- Eastern Cooperative Oncology Group (ECOG) performance status of 0-1.
- Availability of adequate pretreatment tumor tissue and peripheral blood samples for whole-exome sequencing (WES) and personalized circulating tumor DNA (ctDNA)/MRD analysis.
- Life expectancy >12 months.
- Willing and able to comply with the study procedures and scheduled follow-up.
Exclusion Criteria:
- Presence of another malignancy.
- Prior immunotherapy for the current stage IV colorectal cancer.
- Organ transplantation within 3 months before enrollment.
- History of blood transfusion within 3 months before enrollment.
- Active, known, or suspected autoimmune disease, or evidence of active or chronic infection with hepatitis B virus, hepatitis C virus, or human immunodeficiency virus (HIV).
- Pregnancy or breastfeeding.
- Presence of a serious concurrent disease that, in the investigator's judgment, may substantially affect life expectancy or study participation.
- Failure to provide written informed consent.
- Any other condition that, in the investigator's judgment, makes the participant unsuitable for enrollment.
Studieplan
Hvordan er undersøgelsen tilrettelagt?
Design detaljer
- Primært formål: Behandling
- Tildeling: Randomiseret
- Interventionel model: Parallel tildeling
- Maskning: Ingen (Åben etiket)
Antal våben
Våben og indgreb
Deltagergruppe / ArmDeltagergruppe / Arm |
Intervention / BehandlingIntervention / Behandling |
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Eksperimentel: MRD-Guided Treatment Discontinuation
Patients with dMMR/MSI-H metastatic colorectal cancer who achieve an objective response after 1 year of immunotherapy and have two consecutive negative plasma MRD results will be randomized to discontinue immunotherapy.
Patients will enter observation and undergo routine clinical and imaging assessments, with plasma MRD testing every 3 months until the study endpoint.
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Patients with dMMR/MSI-H metastatic colorectal cancer who achieve an objective response after 1 year of immunotherapy and have two consecutive negative plasma MRD results will be randomized to discontinue immunotherapy.
Patients will enter observation and undergo routine clinical and imaging assessments, with plasma MRD testing every 3 months until the study endpoint.
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Aktiv komparator: Continued Immunotherapy
Patients with dMMR/MSI-H metastatic colorectal cancer who achieve an objective response after 1 year of immunotherapy and have two consecutive negative plasma MRD results will be randomized to continue immunotherapy for a total treatment duration of 2 years.
Patients will undergo routine clinical and imaging assessments, with plasma MRD testing every 3 months until the study endpoint.
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Patients with dMMR/MSI-H metastatic colorectal cancer who achieve an objective response after 1 year of immunotherapy and have two consecutive negative plasma MRD results will be randomized to continue immunotherapy for a total treatment duration of 2 years.
Patients will undergo routine clinical and imaging assessments, with plasma MRD testing every 3 months until the study endpoint.
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Andet: Observational Cohort
Patients who achieve disease control for at least 6 months after immunotherapy will undergo plasma MRD testing and prospective follow-up.
The study will not interfere with subsequent treatment decisions, including discontinuation or continuation of immunotherapy, surgery, or local treatment.
Patients will undergo routine clinical follow-up and serial MRD monitoring according to the study schedule.
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Patients who achieve disease control for at least 6 months after immunotherapy will undergo plasma MRD testing and prospective follow-up.
The study will not interfere with subsequent treatment decisions, including discontinuation or continuation of immunotherapy, surgery, or local treatment.
Patients will undergo routine clinical follow-up and serial MRD monitoring according to the study schedule.
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Hvad måler undersøgelsen?
Primære resultatmål
Primære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Progression-Free Survival (PFS)
Tidsramme: From randomization to disease progression, death, or up to 2 years
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Progression-free survival is defined as the time from randomization to the first documented disease progression or death from any cause, whichever occurs first.
Participants without disease progression or death will be censored at the date of the last disease assessment.
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From randomization to disease progression, death, or up to 2 years
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Sekundære resultatmål
Sekundære resultatmål
Resultatmål |
Foranstaltningsbeskrivelse |
Tidsramme |
|---|---|---|
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Overall Survival (OS)
Tidsramme: From randomization to death from any cause or up to 3 years
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Overall survival is defined as the time from randomization to death from any cause.
Participants who are alive at the end of follow-up will be censored at the date they were last known to be alive.
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From randomization to death from any cause or up to 3 years
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Incidence of Immune-Related Adverse Events (irAEs)
Tidsramme: From randomization through 2 years of follow-up
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The incidence of immune-related adverse events will be assessed during the study.
The proportion of participants experiencing immune-related adverse events will be recorded and compared between the treatment-discontinuation and continued-immunotherapy groups.
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From randomization through 2 years of follow-up
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Samarbejdspartnere og efterforskere
Sponsor
Sponsor
Efterforskere
Efterforskere
- Ledende efterforsker: Peirong Ding, M.D., Sun Yat-sen University Cancer Center
Datoer for undersøgelser
Studer store datoer
Studiestart (Faktiske)
Studiestart
Primær færdiggørelse (Anslået)
Primær færdiggørelse
Studieafslutning (Anslået)
Studieafslutning
Datoer for studieregistrering
Først indsendt
Først indsendt
Først indsendt, der opfyldte QC-kriterier
Først indsendt, der opfyldte QC-kriterier
Først opslået (Faktiske)
Først opslået
Opdateringer af undersøgelsesjournaler
Sidste opdatering sendt (Faktiske)
Sidste opdatering sendt
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidste opdatering indsendt, der opfyldte kvalitetskontrolkriterier
Sidst verificeret
Sidst verificeret
Mere information
Begreber relateret til denne undersøgelse
Yderligere relevante MeSH-vilkår
Andre undersøgelses-id-numre
Andre undersøgelses-id-numre
- G2025-013
Plan for individuelle deltagerdata (IPD)
Planlægger du at dele individuelle deltagerdata (IPD)?
Lægemiddel- og udstyrsoplysninger, undersøgelsesdokumenter
Studerer et amerikansk FDA-reguleret lægemiddelprodukt
Studerer et amerikansk FDA-reguleret enhedsprodukt
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