Esta página foi traduzida automaticamente e a precisão da tradução não é garantida. Por favor, consulte o versão em inglês para um texto fonte.

Biomarker-Enriched Kidney-Preserving Strategy With Disitamab Vedotin Plus Tislelizumab in HER2-Positive High-Risk Upper Tract Urothelial Carcinoma

7 de maio de 2026 atualizado por: RenJi Hospital

A Prospective, Multicentre, Single-Arm Phase II Study Evaluating a Response-Adapted Kidney-Preserving Strategy Using Neoadjuvant Disitamab Vedotin Plus Tislelizumab in Patients With HER2-Positive High-Risk Upper Tract Urothelial Carcinoma (DISTINCT-II)

This is a prospective, multicentre, single-arm phase II study evaluating a response-adapted kidney-preserving strategy in patients with HER2-positive high-risk upper tract urothelial carcinoma (UTUC). Patients will receive neoadjuvant disitamab vedotin plus tislelizumab, followed by response-adapted local treatment, including kidney-sparing surgery or radical nephroureterectomy based on predefined criteria.

The primary objective is to assess whether this multimodal strategy can achieve clinically meaningful oncologic control while preserving renal function, as measured by 1-year kidney-intact event-free survival (KI-EFS). Secondary and exploratory objectives include evaluation of clinical response, survival outcomes, safety, renal function preservation, and longitudinal dynamics of circulating and urinary tumor DNA.

Visão geral do estudo

Status

Ainda não está recrutando

Condições

Intervenção / Tratamento

Descrição detalhada

This is a prospective, multicentre, single-arm, phase II clinical trial designed to evaluate the efficacy and safety of a response-adapted kidney-preserving treatment strategy in patients with HER2-positive high-risk upper tract urothelial carcinoma (UTUC).

Eligible patients will receive neoadjuvant systemic therapy consisting of disitamab vedotin in combination with tislelizumab administered every 3 weeks for 2-4 cycles. Tumour response will be assessed after two cycles using radiographic evaluation and clinical assessment. Patients demonstrating clinical benefit will proceed to complete induction therapy, followed by comprehensive restaging including imaging, ureteroscopy with biopsy, and urine cytology.

Subsequent local treatment will be determined according to a predefined response-adapted algorithm. Patients meeting protocol-specified criteria will undergo kidney-sparing surgery (KSS), including segmental ureterectomy or endoscopic ablation depending on tumour location and anatomical feasibility. Patients not meeting criteria for KSS will undergo radical nephroureterectomy (RNU).

The primary objective of the study is to determine whether this multimodal strategy can achieve clinically meaningful oncologic control while preserving renal function in a biomarker-selected population.

In addition, longitudinal biospecimen collection will be conducted to evaluate the dynamics of urinary tumor DNA (utDNA) and circulating tumor DNA (ctDNA) as exploratory biomarkers of treatment response and minimal residual disease.

Tipo de estudo

Intervencional

Inscrição (Estimado)

50

Estágio

  • Fase 2

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
        • Ethics Committee of Shanghai Renji Hospital
        • Contato:

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:

  • Age ≥18 years at the time of informed consent.
  • Histologically confirmed upper tract urothelial carcinoma (UTUC) arising from the renal pelvis or ureter, based on ureteroscopic biopsy.
  • High-risk UTUC, defined by at least one of the following features: Tumour size ≥2 cm; High-grade cytology or biopsy; Radiographic evidence of local invasion (≥cT2); Hydronephrosis; Multifocal disease
  • Clinical stage cT1-T3, N0-N1, M0, based on radiographic assessment.
  • N1 disease is permitted only if lymph nodes are considered resectable.
  • HER2-positive disease, defined as immunohistochemistry (IHC) score of 1+，2+ or 3+ on tumour tissue, assessed according to predefined criteria.
  • At least one measurable lesion according to RECIST version 1.1.
  • ECOG performance status of 0-1
  • Adequate organ function, including: Hematologic function; Hepatic function; Renal function (no strict upper/lower limit required);
  • Patients must be considered potential candidates for a kidney-preserving treatment strategy, including: Absolute or relative indication for renal preservation (e.g., solitary kidney, baseline renal insufficiency), or Strong preference for kidney preservation after multidisciplinary discussion
  • Ability to understand and willingness to sign written informed consent.

Exclusion Criteria:

  • Evidence of distant metastatic disease (M1).
  • Unresectable or bulky nodal disease (≥N2) not amenable to curative-intent surgery.
  • Prior systemic therapy for urothelial carcinoma, including:Chemotherapy; Immunotherapy; HER2-targeted therapy.
  • Prior radical nephroureterectomy for current disease.
  • Active autoimmune disease requiring systemic treatment within the past 2 years.
  • Current use of immunosuppressive medication, excluding physiologic doses of corticosteroids.
  • Uncontrolled intercurrent illness, including but not limited to: Active infection requiring systemic therapy; Uncontrolled cardiovascular disease; Significant pulmonary disease
  • Known active hepatitis B, hepatitis C, or HIV infection with uncontrolled viral replication.
  • History of another malignancy within the past 5 years, except: Adequately treated basal cell carcinoma; Squamous cell skin cancer; In situ carcinoma.
  • Pregnant or breastfeeding women.
  • Any condition that, in the opinion of the investigator, would interfere with study participation or interpretation of results.

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: N / D
  • Modelo Intervencional: Atribuição de grupo único
  • Mascaramento: Nenhum (rótulo aberto)

Armas e Intervenções

Grupo de Participantes / Braço
Intervenção / Tratamento
Experimental: Neoadjuvant disitamab vedotin + tislelizumab followed by response-adapted surgery

Drug: Disitamab Vedotin Administered intravenously at 2.0 mg/kg every 3 weeks

Drug: Tislelizumab Administered intravenously at 200 mg every 3 weeks

Procedure: Surgery Kidney-sparing surgery (segmental ureterectomy or endoscopic ablation) or radical nephroureterectomy based on predefined criteria
Medicamento: RC48 Combined With Tislelizumab
In this trial, RC48 was scheduled to be administered at a dose of 2.0 mg/kg every 3 weeks, with the first dose on day 1 of the first cycle. Tislelizumab was administered at a dose of 200 mg every 3 weeks, with the first dose on day 1 of the first 21-day cycle. The drug is diluted with normal saline and administered by intravenous drip for one hour.

O que o estudo está medindo?

Medidas de resultados primários

Medida de resultado
Descrição da medida
Prazo
Kidney-Intact Event-Free Survival (KI-EFS) at 1 year
Prazo: From enrollment to 12 months

KI-EFS is defined as the time from study enrollment to the first occurrence of any of the following events:

High-risk recurrence of upper tract urothelial carcinoma (local, regional, or distant), defined according to prespecified clinical or radiographic criteria Death from any cause Conversion to radical nephroureterectomy (RNU) for any reason

Patients without an event will be censored at the date of last disease assessment.
From enrollment to 12 months

Medidas de resultados secundários

Medida de resultado
Descrição da medida
Prazo
Kidney-Intact Event-Free Survival at 2 years
Prazo: Up to 24 months

KI-EFS is defined as the time from study enrollment to the first occurrence of any of the following events:

High-risk recurrence of upper tract urothelial carcinoma (local, regional, or distant), defined according to prespecified clinical or radiographic criteria Death from any cause Conversion to radical nephroureterectomy (RNU) for any reason

Patients without an event will be censored at the date of last disease assessment.
Up to 24 months
Disease-Free Survival (DFS) Renal Function Preservation
Prazo: Up to 24 months
Time from definitive local treatment (KSS or RNU) to upper tract recurrence or death from any cause. Isolated bladder recurrence will not be counted as an event.
Up to 24 months
Clinical Complete Response (cCR) Rate After Induction Therapy
Prazo: Immediately after Induction Therapy
Clinical complete response (cCR) was defined as concordant negative findings on cross-sectional imaging, ureteroscopy, urine cytology, and targeted biopsy according to predefined criteria
Immediately after Induction Therapy
Clinical Complete Response (cCR) Rate After Kidney-Sparing Surgery
Prazo: 1 month after surgery
Clinical complete response (cCR) was defined as concordant negative findings on cross-sectional imaging, ureteroscopy, urine cytology, and targeted biopsy according to predefined criteria
1 month after surgery
Renal Function Preservation
Prazo: Up to 12 months
Change in estimated glomerular filtration rate (eGFR)
Up to 12 months
Safety and Tolerability
Prazo: Up to 90 days post-treatment
Incidence of treatment-related adverse events graded by CTCAE v5.0
Up to 90 days post-treatment

Outras medidas de resultado

Medida de resultado
Descrição da medida
Prazo
ctDNA/utDNA Dynamics
Prazo: Up to 12 months
Detection tumor DNA (ctDNA/utDNA) using a fixed deep-sequencing panel.
Up to 12 months
HER2 expression level Exploratory Molecular Analyses
Prazo: baseline, pre-Induction Therapy
HER2 expression level pre-Induction Therapy
baseline, pre-Induction Therapy

Colaboradores e Investigadores

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

Patrocinador

RenJi Hospital

Colaboradores

Peking University First Hospital
West China Hospital
Tianjin Medical University Second Hospital

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)

31 de maio de 2026

Conclusão Primária (Estimado)

31 de dezembro de 2027

Conclusão do estudo (Estimado)

31 de dezembro de 2028

Datas de inscrição no estudo

Enviado pela primeira vez

4 de maio de 2026

Enviado pela primeira vez que atendeu aos critérios de CQ

7 de maio de 2026

Primeira postagem (Real)

13 de maio de 2026

Atualizações de registro de estudo

Última Atualização Postada (Real)

13 de maio de 2026

Última atualização enviada que atendeu aos critérios de controle de qualidade

7 de maio de 2026

Última verificação

1 de maio de 2026

Mais Informações

Termos relacionados a este estudo

Palavras-chave

Termos MeSH relevantes adicionais

Outros números de identificação do estudo

  • DISTINCT II

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

Essas informações foram obtidas diretamente do site clinicaltrials.gov sem nenhuma alteração. Se você tiver alguma solicitação para alterar, remover ou atualizar os detalhes do seu estudo, entre em contato com register@clinicaltrials.gov. Assim que uma alteração for implementada em clinicaltrials.gov, ela também será atualizada automaticamente em nosso site .

Se inscrever