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Short-Course Radiotherapy Followed by CAPOX With or Without Iparomlimab and Tuvonralimab in pMMR/MSS Locally Advanced Rectal Cancer (SCRIT)

17 augustus 2026 bijgewerkt door: Jinbo Yue, Shandong Cancer Hospital and Institute

Short-Course Radiotherapy Followed by CAPOX With or Without Iparomlimab and Tuvonralimab in pMMR/MSS Locally Advanced Rectal Cancer (SCRIT): A Multicenter Phase III Randomized Controlled Trial

This multicenter, randomized, controlled, phase III trial evaluates whether adding iparomlimab and tuvonralimab injection to CAPOX consolidation chemotherapy after short-course radiotherapy improves tumor response in patients with treatment-naive, proficient mismatch repair/microsatellite-stable (pMMR/MSS) locally advanced rectal adenocarcinoma. Eligible patients will be randomly assigned in a 1:1 ratio to receive short-course radiotherapy followed by CAPOX plus iparomlimab and tuvonralimab, or short-course radiotherapy followed by CAPOX alone.

After total neoadjuvant therapy, patients with a clinical complete response may undergo a Watch-and-Wait strategy, whereas other patients will undergo total mesorectal excision according to standard clinical practice. The primary endpoint is complete response rate, defined as pathologic complete response after surgery or clinical complete response sustained for more than 1 year. Secondary endpoints include 3-year relapse-free survival, 3-year overall survival, sphincter preservation rate, and grade 3-4 acute adverse events. Exploratory analyses will assess tissue and blood biomarkers associated with treatment response.

Studie Overzicht

Toestand

Werving

Conditie

Interventie / Behandeling

Studietype

Ingrijpend

Inschrijving (Geschat)

180

Fase

  • Fase 3

Contacten en locaties

In dit gedeelte vindt u de contactgegevens van degenen die het onderzoek uitvoeren en informatie over waar dit onderzoek wordt uitgevoerd.

Studiecontact

Studie Locaties

  • China
    • Shandong
      • Jinan, Shandong, China, 0531
        • Werving
        • Shandong Cancer Hospital And Institute
        • Contact:
        • Contact:

Deelname Criteria

Onderzoekers zoeken naar mensen die aan een bepaalde beschrijving voldoen, de zogenaamde geschiktheidscriteria. Enkele voorbeelden van deze criteria zijn iemands algemene gezondheidstoestand of eerdere behandelingen.

Geschiktheidscriteria

Leeftijden die in aanmerking komen voor studie

  • Volwassen
  • Oudere volwassene

Accepteert gezonde vrijwilligers

Nee

Beschrijving

Inclusion Criteria:

  • Patients aged 18-75 years with histologically confirmed pMMR/MSS rectal adenocarcinoma are eligible if they have MRI-defined clinical stage II or III disease according to AJCC 8th edition, tumor located within 12 cm from the anal verge, and at least one high-risk feature, including cT4b, cN2, EMVI positivity, MRF positivity, lateral lymph node positivity, tumor deposits, or tumor located ≤5 cm from the anal verge. Patients must have no distant metastasis, ECOG performance status 0-1, life expectancy greater than 6 months, and adequate hematologic, hepatic, and renal function

Exclusion Criteria:

  • active or prior autoimmune disease requiring systemic treatment, use of immunosuppressive therapy or systemic corticosteroids at immunosuppressive doses, severe hypersensitivity to monoclonal antibodies, uncontrolled cardiac disease, significant coagulopathy or bleeding tendency, active infection, interstitial lung disease or severe pulmonary dysfunction, HIV infection or active hepatitis, prior or concurrent malignancy except specified cured cancers, recent investigational drug use, planned use of other systemic antitumor therapy during the study, pregnancy or breastfeeding, and any other condition judged by the investigator to make participation unsuitable.

Studie plan

Dit gedeelte bevat details van het studieplan, inclusief hoe de studie is opgezet en wat de studie meet.

Hoe is de studie opgezet?

Ontwerpdetails

  • Primair doel: Behandeling
  • Toewijzing: Gerandomiseerd
  • Interventioneel model: Parallelle opdracht
  • Masker: Geen (open label)

Wapens en interventies

Deelnemersgroep / Arm
Interventie / Behandeling
Experimenteel: Treatment

Short-Course Radiotherapy + CAPOX + Iparomlimab and Tuvonralimab Radiotherapy: Short-course external-beam radiotherapy will be delivered to the rectal primary tumor and corresponding lymphatic drainage regions using IMRT or VMAT. The prescribed dose is 25 Gy in 5 fractions over 1 week. No concurrent chemotherapy will be administered during short-course radiotherapy.

Consolidation treatment: Iparomlimab and tuvonralimab injection will be administered at 5 mg/kg by intravenous infusion every 21 days for 6 cycles. CAPOX chemotherapy will consist of oxaliplatin 130 mg/m² intravenously on day 1 plus capecitabine 1000 mg/m² orally twice daily on days 1-14 of each 21-day cycle, for 6 cycles.
Straling: Short-Course Radiotherapy
Short-course external-beam radiotherapy will be delivered to the rectal primary tumor and corresponding lymphatic drainage regions using IMRT or VMAT. The prescribed dose is 25 Gy in 5 fractions over 1 week. No concurrent chemotherapy will be administered during short-course radiotherapy.
Geneesmiddel: Consolidation treatment (With ICIs)
Iparomlimab and tuvonralimab injection will be administered at 5 mg/kg by intravenous infusion every 21 days for 6 cycles. CAPOX chemotherapy will consist of oxaliplatin 130 mg/m² intravenously on day 1 plus capecitabine 1000 mg/m² orally twice daily on days 1-14 of each 21-day cycle, for 6 cycles.
Actieve vergelijker: Control

Short-Course Radiotherapy + CAPOX Radiotherapy: Short-course external-beam radiotherapy will be delivered to the rectal primary tumor and corresponding lymphatic drainage regions using IMRT or VMAT. The prescribed dose is 25 Gy in 5 fractions over 1 week. No concurrent chemotherapy will be administered during short-course radiotherapy.

Consolidation treatment: CAPOX chemotherapy will consist of oxaliplatin 130 mg/m² intravenously on day 1 plus capecitabine 1000 mg/m² orally twice daily on days 1-14 of each 21-day cycle, for 6 cycles.
Straling: Short-Course Radiotherapy
Short-course external-beam radiotherapy will be delivered to the rectal primary tumor and corresponding lymphatic drainage regions using IMRT or VMAT. The prescribed dose is 25 Gy in 5 fractions over 1 week. No concurrent chemotherapy will be administered during short-course radiotherapy.
Geneesmiddel: Consolidation treatment (Without ICIs)
CAPOX chemotherapy will consist of oxaliplatin 130 mg/m² intravenously on day 1 plus capecitabine 1000 mg/m² orally twice daily on days 1-14 of each 21-day cycle, for 6 cycles.

Wat meet het onderzoek?

Primaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
Complete Response (CR) Rate
Tijdsspanne: From randomization to completion of definitive response assessment, including surgical pathological assessment after total neoadjuvant therapy or confirmation of sustained clinical complete response after at least 12 months of Watch-and-Wait follow-up
Complete response rate is defined as the proportion of patients who achieve either pathologic complete response (pCR) after surgery or sustained clinical complete response (cCR) for more than 1 year during Watch-and-Wait follow-up.
From randomization to completion of definitive response assessment, including surgical pathological assessment after total neoadjuvant therapy or confirmation of sustained clinical complete response after at least 12 months of Watch-and-Wait follow-up

Secundaire uitkomstmaten

Uitkomstmaat
Maatregel Beschrijving
Tijdsspanne
3-Year Relapse-Free Survival (RFS)
Tijdsspanne: From randomization to the first documented disease relapse/recurrence, death from any cause, or 3 years after randomization, whichever occurs first.
Relapse-free survival is defined as the time from randomization to the first evidence of disease relapse or recurrence. Patients without relapse/recurrence or death will be censored at the date of last disease assessment.
From randomization to the first documented disease relapse/recurrence, death from any cause, or 3 years after randomization, whichever occurs first.
3-Year Overall Survival (OS)
Tijdsspanne: From randomization to death from any cause or 3 years after randomization, whichever occurs first.
Overall survival is defined as the time from randomization to death from any cause. Patients who are alive at the time of analysis will be censored at the date of last known survival follow-up.
From randomization to death from any cause or 3 years after randomization, whichever occurs first.
Sphincter Preservation Rate
Tijdsspanne: From randomization to completion of definitive surgery, or to at least 12 months after initiation of Watch-and-Wait follow-up for patients who do not undergo surgery; approximately up to 18-24 months after randomization.
Sphincter preservation rate is defined as the proportion of patients who successfully preserve anal sphincter structure and function and avoid permanent colostomy.
From randomization to completion of definitive surgery, or to at least 12 months after initiation of Watch-and-Wait follow-up for patients who do not undergo surgery; approximately up to 18-24 months after randomization.
Incidence of Grade 3-4 Acute Adverse Events
Tijdsspanne: From the start of study treatment to 30 days after completion of neoadjuvant treatment.
Acute adverse events will be graded and recorded according to the National Cancer Institute Common Terminology Criteria for Adverse Events, version 5.0. The incidence of grade 3-4 acute adverse events will be summarized by treatment arm.
From the start of study treatment to 30 days after completion of neoadjuvant treatment.

Medewerkers en onderzoekers

Hier vindt u mensen en organisaties die betrokken zijn bij dit onderzoek.

Sponsor

Shandong Cancer Hospital and Institute

Onderzoekers

  • Hoofdonderzoeker: Jinbo Yue, Doctor, study principal investigator

Studie record data

Deze datums volgen de voortgang van het onderzoeksdossier en de samenvatting van de ingediende resultaten bij ClinicalTrials.gov. Studieverslagen en gerapporteerde resultaten worden beoordeeld door de National Library of Medicine (NLM) om er zeker van te zijn dat ze voldoen aan specifieke kwaliteitscontrolenormen voordat ze op de openbare website worden geplaatst.

Bestudeer belangrijke data

Studie start (Werkelijk)

15 augustus 2026

Primaire voltooiing (Geschat)

15 juli 2029

Studie voltooiing (Geschat)

15 juli 2030

Studieregistratiedata

Eerst ingediend

30 juni 2026

Eerst ingediend dat voldeed aan de QC-criteria

30 juni 2026

Eerst geplaatst (Werkelijk)

7 juli 2026

Updates van studierecords

Laatste update geplaatst (Werkelijk)

18 augustus 2026

Laatste update ingediend die voldeed aan QC-criteria

17 augustus 2026

Laatst geverifieerd

1 augustus 2026

Meer informatie

Termen gerelateerd aan deze studie

Trefwoorden

Andere studie-ID-nummers

  • SDZLEC2026-051-002

Plan Individuele Deelnemersgegevens (IPD)

Bent u van plan om gegevens van individuele deelnemers (IPD) te delen?

NEE

Informatie over medicijnen en apparaten, studiedocumenten

Bestudeert een door de Amerikaanse FDA gereguleerd geneesmiddel

Nee

Bestudeert een door de Amerikaanse FDA gereguleerd apparaatproduct

Nee

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