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FAPI-Guided Radiotherapy With Cadonilimab and Standard Chemotherapy for Colorectal Peritoneal Metastasis: A Phase III Randomized Controlled Trial (TORHC-PM02) (TORCH-PM02)

8 de setembro de 2026 atualizado por: Zhen Zhang, Fudan University

FAPI-Guided Hypofractionated Radiotherapy Combined With Cadonilimab and Standard Second-Line Chemotherapy Versus Standard Second-Line Chemotherapy for Peritoneal Metastasis From Colorectal Cancer: A Multicenter, Randomized, Open-Label, Phase III Trial (TORHC-PM02)

The goal of this clinical trial is to test whether adding targeted radiation plus cadonilimab immunotherapy to standard second-line chemo works better for adults with colorectal cancer only spread to the peritoneum, and check how safe this combined treatment is. Its main research questions are:

Does the combined treatment slow cancer growth for a longer time than standard chemo alone? What side effects will participants get from the new combination therapy? Researchers will compare the chemo-radiation-immunotherapy combination against standard chemo alone to see if the new plan shrinks tumors and improves outcomes.

Participants will:

Receive either the new combined treatment or standard chemo chosen randomly by chance Visit the hospital regularly for drug infusions, scans and physical exams Complete questionnaires about daily quality of life and report any discomfort

Visão geral do estudo

Status

Ainda não está recrutando

Condições

Intervenção / Tratamento

Tipo de estudo

Intervencional

Inscrição (Estimado)

198

Estágio

  • Fase 3

Contactos e Locais

Esta seção fornece os detalhes de contato para aqueles que conduzem o estudo e informações sobre onde este estudo está sendo realizado.

Contato de estudo

Locais de estudo

  • China
    • Shanghai Municipality
      • Shanghai, Shanghai Municipality, China, 200032
        • Fudan University Shanghai Cancer Center
        • Contato:
        • Contato:
        • Investigador principal:
          • Zhen Zhang, Ph.D, M.D.
        • Investigador principal:
          • Guoxiang Cai, Ph.D, M.D.

Critérios de participação

Os pesquisadores procuram pessoas que se encaixem em uma determinada descrição, chamada de critérios de elegibilidade. Alguns exemplos desses critérios são a condição geral de saúde de uma pessoa ou tratamentos anteriores.

Critérios de elegibilidade

Idades elegíveis para estudo

  • Adulto
  • Adulto mais velho

Aceita Voluntários Saudáveis

Não

Descrição

Inclusion Criteria:

  1. Histopathologically confirmed colorectal adenocarcinoma.
  2. Tumors confirmed pMMR by immunohistochemistry or MSI-L/MSS via gene sequencing.
  3. Metastases limited to peritoneum only, no metastases in other organs.
  4. No moderate or massive ascites; only trivial physiological effusion without drainage requirement.
  5. No symptomatic intestinal obstruction and no obstructive signs on imaging; patients can take food normally.
  6. Baseline CT/MRI confirms peritoneal metastases.
  7. Positive baseline FAPI PET/CT: at least one peritoneal mass lesion with long diameter ≥1 cm and markedly elevated SUVmax suitable for radiotherapy contouring.
  8. At least one measurable lesion per RECIST v1.1 criteria.
  9. Progression after first-line standard systemic therapy (FOLFOX/XELOX ± targeted agents); no prior second-line treatment received.
  10. Peritoneal recurrence within 1 year after adjuvant fluoropyrimidine-based chemotherapy.
  11. No moderate or massive ascites; only trivial physiological effusion without drainage requirement.
  12. Voluntarily sign written informed consent and comply with scheduled study visits and treatment procedures.

Exclusion Criteria:

  1. Prior exposure to any anti-PD-1, anti-PD-L1, anti-PD-L2, anti-CTLA-4 antibody or other agents targeting T-cell co-stimulatory/checkpoint pathways.
  2. Moderate or massive ascites requiring clinical intervention.
  3. Partial or complete symptomatic intestinal obstruction.
  4. Pregnant or breastfeeding women.
  5. History of high-dose abdominal radiotherapy that prevents re-irradiation.
  6. Diffuse miliary peritoneal metastases on FAPI PET/CT without definable target volume for radiotherapy.
  7. Active autoimmune diseases (systemic lupus erythematosus, rheumatoid arthritis, etc.); systemic corticosteroids or other immunosuppressants required within 14 days before enrollment; severe underlying vital organ disease judged unsuitable for immunotherapy by investigators.
  8. Poor compliance or other conditions judged inappropriate for study participation by investigators.

Plano de estudo

Esta seção fornece detalhes do plano de estudo, incluindo como o estudo é projetado e o que o estudo está medindo.

Como o estudo é projetado?

Detalhes do projeto

  • Finalidade Principal: Tratamento
  • Alocação: Randomizado
  • Modelo Intervencional: Atribuição Paralela
  • Mascaramento: Nenhum (rótulo aberto)

Armas e Intervenções

Grupo de Participantes / Braço
Intervenção / Tratamento
Experimental: Chemo-immunotherapy plus FAPI-guided radiotherapy
Participants receive standard second-line chemotherapy combined with cadonilimab immunotherapy given every two weeks. They also receive hypofractionated radiotherapy guided by FAPI PET/CT to treat peritoneal tumor masses. Radiation doses are adjusted to protect the small intestine. After every eight weeks of treatment, a multidisciplinary team assesses whether surgery is possible. Treatment continues until cancer worsens or side effects become too severe to tolerate.
Medicamento: Second-Line Chemotherapy
All chemotherapy agents are given by intravenous infusion every 2 weeks with oxaliplatin, leucovorin and continuous infusion fluorouracil, or irinotecan, leucovorin and continuous infusion fluorouracil. Targeted agents bevacizumab or cetuximab can be added per investigator's clinical judgment. Dose adjustments are allowed for myelosuppression, gastrointestinal or other toxicities.
Radiação: Radiation Therapy
Radiation target volumes are contoured on fused FAPI PET/CT images for peritoneal masses ≥1 cm. Fraction doses range from 5 Gy to 25 Gy over 5 fractions, modified to meet small intestine organ-at-risk constraints. Radiation is delivered within the first 8 weeks of combined chemoimmunotherapy treatment.
Medicamento: Cadonilimab (AK104)
Cadonilimab is a PD-1/CTLA-4 dual-target biologic agent. The fixed dose of 6 mg/kg is infused intravenously once every 2 weeks alongside chemotherapy. Dose delay or permanent discontinuation will be applied for grade 3-4 immune-related adverse events that do not improve with immunosuppressive treatment.
Comparador Ativo: Standard second-line chemotherapy only
Participants receive standard second-line chemotherapy every two weeks. No immunotherapy or radiation treatment is provided in this group. Treatment continues until cancer worsens or side effects become too severe to tolerate. Tumor assessment will be performed after 8 weeks of therapy, a multidisciplinary team assesses whether surgery is possible. Treatment continues until cancer worsens or side effects become too severe to tolerate.
Medicamento: Second-Line Chemotherapy
All chemotherapy agents are given by intravenous infusion every 2 weeks with oxaliplatin, leucovorin and continuous infusion fluorouracil, or irinotecan, leucovorin and continuous infusion fluorouracil. Targeted agents bevacizumab or cetuximab can be added per investigator's clinical judgment. Dose adjustments are allowed for myelosuppression, gastrointestinal or other toxicities.

O que o estudo está medindo?

Medidas de resultados primários

Medida de resultado
Descrição da medida
Prazo
Progression-Free Survival (PFS)
Prazo: Up to 36 months after randomization
Time from randomization to first documentation of tumor progression (including enlargement of target lesions, new distant metastases, or new onset of ascites) or death from any cause, whichever occurs first, assessed per RECIST v1.1.
Up to 36 months after randomization

Medidas de resultados secundários

Medida de resultado
Descrição da medida
Prazo
Overall Survival (OS)
Prazo: OS is defined from randomization until death from any cause up to 36 months.
Survival duration from randomization until death from any cause.
OS is defined from randomization until death from any cause up to 36 months.
Objective Response Rate (ORR)
Prazo: The best overall tumor response will be assessed every 8 weeks after the participant begins study treatment by scheduled MDT assessment through study completion, up to 36 months.
The best overall tumor response rate, defined as the proportion of participants achieving confirmed complete response or partial response assessed via imaging based on RECIST 1.1 criteria and verified by multidisciplinary team review.
The best overall tumor response will be assessed every 8 weeks after the participant begins study treatment by scheduled MDT assessment through study completion, up to 36 months.
Disease Control Rate (DCR)
Prazo: The best overall disease control rate will be assessed every 8 weeks after the participant begins study treatment by scheduled MDT assessment through study completion, up to 36 months.
The best overall disease control rate, defined as the proportion of participants with confirmed complete response, partial response or stable disease assessed via imaging based on RECIST 1.1 criteria and verified by multidisciplinary team review.
The best overall disease control rate will be assessed every 8 weeks after the participant begins study treatment by scheduled MDT assessment through study completion, up to 36 months.
Treatment-related adverse events
Prazo: Side effects will be recorded from the participant's first study treatment dose with radiotherapy and system treatment every cycle to 30 days after their final study treatment dose through study completion, up to 36 months.
Incidence and severity of treatment side effects graded by NCI CTCAE v6.0.
Side effects will be recorded from the participant's first study treatment dose with radiotherapy and system treatment every cycle to 30 days after their final study treatment dose through study completion, up to 36 months.
Quality of life( QoL)
Prazo: At baseline and radiotherapy period will be reorded once, at system treatments QoL will be reported and recorded every 8 weeks regularly during the treatment through study completion, up to 36 months.
Patient self-assessment via EORTC QLQ-C30 questionnaire to monitor changes in quality of life throughout treatment.
At baseline and radiotherapy period will be reorded once, at system treatments QoL will be reported and recorded every 8 weeks regularly during the treatment through study completion, up to 36 months.

Outras medidas de resultado

Medida de resultado
Descrição da medida
Prazo
Change in Peritoneal Cancer Index (PCI)
Prazo: At baseline and every 8 weeks fixed assessment time points during treatment by scheduled MDT assessment through study completion, up to 36 months.
PCI score reflecting peritoneal tumor burden is measured on FAPI PET/CT images to observe tumor load variations.
At baseline and every 8 weeks fixed assessment time points during treatment by scheduled MDT assessment through study completion, up to 36 months.

Colaboradores e Investigadores

É aqui que você encontrará pessoas e organizações envolvidas com este estudo.

Patrocinador

Fudan University

Datas de registro do estudo

Essas datas acompanham o progresso do registro do estudo e os envios de resumo dos resultados para ClinicalTrials.gov. Os registros do estudo e os resultados relatados são revisados ​​pela National Library of Medicine (NLM) para garantir que atendam aos padrões específicos de controle de qualidade antes de serem publicados no site público.

Datas Principais do Estudo

Início do estudo (Estimado)

1 de setembro de 2026

Conclusão Primária (Estimado)

1 de agosto de 2030

Conclusão do estudo (Estimado)

1 de março de 2031

Datas de inscrição no estudo

Enviado pela primeira vez

1 de setembro de 2026

Enviado pela primeira vez que atendeu aos critérios de CQ

8 de setembro de 2026

Primeira postagem (Real)

11 de setembro de 2026

Atualizações de registro de estudo

Última Atualização Postada (Real)

11 de setembro de 2026

Última atualização enviada que atendeu aos critérios de controle de qualidade

8 de setembro de 2026

Última verificação

1 de setembro de 2026

Mais Informações

Termos relacionados a este estudo

Palavras-chave

Termos MeSH relevantes adicionais

Outros números de identificação do estudo

  • FDRT-2026-426-5278

Plano para dados de participantes individuais (IPD)

Planeja compartilhar dados de participantes individuais (IPD)?

NÃO

Informações sobre medicamentos e dispositivos, documentos de estudo

Estuda um medicamento regulamentado pela FDA dos EUA

Não

Estuda um produto de dispositivo regulamentado pela FDA dos EUA

Não

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