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Sintilimab Combined With LCCRT Followed by Capeox Chemotherapy in pMMR/MSS/MSI-L Locally Advanced Rectal Cancer

30. oktober 2026 oppdatert av: Innovent Biologics (Suzhou) Co. Ltd.

Sintilimab Combined With Long-Course Concurrent Chemoradiotherapy Followed by Capeox Consolidation Chemotherapy vs. Long-Course Concurrent Chemoradiotherapy Followed by Capeox Consolidation Chemotherapy for Total Neoadjuvant Therapy in Patients With Mismatch Repair-Proficient (pMMR) or Microsatellite Stable/Low Microsatellite Instability (MSS/MSI-L) Locally Advanced Rectal Cancer: A Multicenter, Randomized, Double-Blind, Controlled Phase III Study

This is a randomized, double-blind, controlled, Phase III clinical study to evaluate the efficacy and safety of sintilimab combined with long-course concurrent chemoradiotherapy followed by Capeox consolidation chemotherapy, which is planned to enroll 500 subjects with locally advanced rectal cancer.

Studieoversikt

Status

Har ikke rekruttert ennå

Forhold

Intervensjon / Behandling

Studietype

Intervensjonell

Registrering (Antatt)

500

Fase

  • Fase 3

Kontakter og plasseringer

Denne delen inneholder kontaktinformasjon for de som utfører studien, og informasjon om hvor denne studien blir utført.

Studiekontakt

Studiesteder

  • Kina
    • Guangdong
      • Guangzhou, Guangdong, Kina, 510060
        • Sun Yat sen University Cancer Center
        • Ta kontakt med:

Deltakelseskriterier

Forskere ser etter personer som passer til en bestemt beskrivelse, kalt kvalifikasjonskriterier. Noen eksempler på disse kriteriene er en persons generelle helsetilstand eller tidligere behandlinger.

Kvalifikasjonskriterier

Alder som er kvalifisert for studier

18 år og eldre (Voksen, Eldre voksen)

Tar imot friske frivillige

Nei

Kjønn som er kvalifisert for studier

Alle

Beskrivelse

Inclusion Criteria

  1. Has signed the written Informed Consent Form and is capable of complying with the visit schedules and relevant procedures specified in the protocol.
  2. Histopathologically confirmed locally advanced rectal adenocarcinoma, with clinical stage cT3-4NanyM0 or cT1-2N1-2M0 as defined by the AJCC 8th edition, and assessed as amenable to R0 resection after neoadjuvant therapy. MRI demonstrates that the lower edge of the tumor is within 10 cm from the anal verge.
  3. Tumor pathological tissue testing confirms pMMR, i.e., immunohistochemical staining shows positive expression of all four proteins MLH1, MSH2, MSH6, and PMS2, or tumor tissue-based genetic testing indicates MSI-L or MSS.
  4. No signs of intestinal obstruction; or intestinal obstruction that has been relieved after proximal colostomy.
  5. No prior rectal surgery; no prior systemic anti-cancer therapy, or other investigational drug therapy.
  6. Age ≥18 years, both sexes eligible.
  7. Eastern Cooperative Oncology Group Performance Status (ECOG PS) of 0 or 1.
  8. Expected survival of ≥2 years.
  9. Adequate bone marrow and organ function. Exclusion Criteria

1. Currently participating in another interventional clinical study, except for observational (non-interventional) clinical studies or those in the survival follow-up phase of an interventional study.

2. Plans to receive other anti-tumor therapy during the treatment period of this study.

3. Receipt of any live vaccine within 4 weeks before the first dose of study drug, or plans to receive any live vaccine during the study period.

4. Presence of toxicity from prior therapy that has not recovered to Grade 0 or 1 per NCI CTCAE V6.0 before the first dose of study drug (excluding alopecia, fatigue, pigmentation, and other conditions judged by the investigator to pose no safety risk).

5. Major surgery 6. Receipt of immunosuppressive therapy within 4 weeks before the first dose of study drug, excluding topical corticosteroids administered intranasally, by inhalation, or by other local routes, or physiological doses of systemic corticosteroids , or corticosteroids used to prevent contrast agent allergy.

7. Recurrent rectal cancer; multiple primary colorectal cancers. 8. History of pelvic or abdominal radiotherapy.

Studieplan

Denne delen gir detaljer om studieplanen, inkludert hvordan studien er utformet og hva studien måler.

Hvordan er studiet utformet?

Designdetaljer

  • Primært formål: Behandling
  • Tildeling: Randomisert
  • Intervensjonsmodell: Parallell tildeling
  • Masking: Dobbelt

Våpen og intervensjoner

Deltakergruppe / Arm
Intervensjon / Behandling
Placebo komparator: Placebo

Placebo combined with long-course concurrent chemoradiotherapy followed by Capeox consolidation chemotherapy
Legemiddel: Oxaliplatin

130 mg/m²，IV，Q3W

Legemiddel: Placebo

20 ml D1 IV Q3W

Stråling: radiotherapy

PTV1 50 Gy/25 times, PTV2 45 Gy/25 times, 5 days a week, for a total of 5 weeks (D1-D35)

Legemiddel: Capecitabine

825 mg/m ² PO BID ,Days 1-5 QW；1000mg/m ² PO BID ,Days 1-14 Q3W；

Fremgangsmåte: Radical resection of rectal cancer

Radical resection of rectal cancer
Eksperimentell: Sintilimab

sintilimab combined with long-course concurrent chemoradiotherapy followed by Capeox consolidation chemotherapy
Legemiddel: Oxaliplatin

130 mg/m²，IV，Q3W

Stråling: radiotherapy

PTV1 50 Gy/25 times, PTV2 45 Gy/25 times, 5 days a week, for a total of 5 weeks (D1-D35)

Legemiddel: Capecitabine

825 mg/m ² PO BID ,Days 1-5 QW；1000mg/m ² PO BID ,Days 1-14 Q3W；

Fremgangsmåte: Radical resection of rectal cancer

Radical resection of rectal cancer

Legemiddel: Sintilimab

200 mg D1 IV Q3W

Hva måler studien?

Primære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
EFS
Tidsramme: throutg treatment completion an average of 5 years

EFS refers to the time from randomization to the first occurrence of any of the following events: disease progression precluding surgical treatment, local or distant recurrence, death from any cause, etc.
throutg treatment completion an average of 5 years

Sekundære resultatmål

Resultatmål
Tiltaksbeskrivelse
Tidsramme
OS
Tidsramme: throutg treatment completion an average of 5 years

OS is defined as the time from the date of randomization until the date of death from any cause.
throutg treatment completion an average of 5 years
CCR
Tidsramme: up to 5 years after enrollment

CCR defined as the proportion of participants achieving pathological complete response (pCR) or clinical complete response (cCR)
up to 5 years after enrollment
R0 resection rate
Tidsramme: up to 5 years after enrollment

R0 resection rate: Descriptive summary of R0 resection rate
up to 5 years after enrollment
EFS3
Tidsramme: 3yaers

EFS3 defined as the proportion of participants who remain free from any of the following events for 3 years after randomization: disease progression precluding surgery, local or distant recurrence, or death from any cause
3yaers
TRG
Tidsramme: up to 5 years after enrollment

Pathological assessment of tumor regression grading (TRG) after neoadjuvant therapy
up to 5 years after enrollment
neoadjuvant therapy completion rate
Tidsramme: up to 5 years after enrollment

Neoadjuvant therapy completion rate: Descriptive summary of Neoadjuvant therapy completion rate
up to 5 years after enrollment
OPR
Tidsramme: up to 5 years after enrollment

The definition of organ preservation is: no radical total mesorectal excision (TME) performed, and no local regrowth, unless such regrowth can be salvaged by local excision achieving a limited, radical (R0) resection, with no permanent stoma (including a protective stoma that has never been reversed, or a stoma resulting from adverse events and/or poor functional outcome, or a permanent stoma).
up to 5 years after enrollment

Samarbeidspartnere og etterforskere

Det er her du vil finne personer og organisasjoner som er involvert i denne studien.

Sponsor

Innovent Biologics (Suzhou) Co. Ltd.

Studierekorddatoer

Disse datoene sporer fremdriften for innsending av studieposter og sammendragsresultater til ClinicalTrials.gov. Studieposter og rapporterte resultater gjennomgås av National Library of Medicine (NLM) for å sikre at de oppfyller spesifikke kvalitetskontrollstandarder før de legges ut på det offentlige nettstedet.

Studer hoveddatoer

Studiestart (Antatt)

25. november 2026

Primær fullføring (Antatt)

25. mars 2030

Studiet fullført (Antatt)

24. november 2031

Datoer for studieregistrering

Først innsendt

19. oktober 2026

Først innsendt som oppfylte QC-kriteriene

30. oktober 2026

Først lagt ut (Faktiske)

4. november 2026

Oppdateringer av studieposter

Sist oppdatering lagt ut (Faktiske)

4. november 2026

Siste oppdatering sendt inn som oppfylte QC-kriteriene

30. oktober 2026

Sist bekreftet

1. oktober 2026

Mer informasjon

Begreper knyttet til denne studien

Ytterligere relevante MeSH-vilkår

Andre studie-ID-numre

  • CIBI308H301

Legemiddel- og utstyrsinformasjon, studiedokumenter

Studerer et amerikansk FDA-regulert medikamentprodukt

Nei

Studerer et amerikansk FDA-regulert enhetsprodukt

Nei

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