Is Prolonged Systemic Immunotherapy Necessary After Achieving Tumor-free Status in Patients With Extensive Transurethrally Unresectable Very-high-risk NMIBC?
Randomized Trial of Active Surveillance Versus Continued Systemic Immunotherapy After Achieving Tumor-Free Status in Extensive Transurethrally Unresectable Very-High-Risk NMIBC
Patients with extensive transurethrally unresectable very-high-risk non-muscle-invasive bladder cancer (NMIBC) may achieve a tumor-free status after systemic immunotherapy-based bladder-sparing treatment combined with transurethral resection of bladder tumor (TURBT). However, the optimal duration of systemic immunotherapy after achieving a tumor-free status remains uncertain. Prolonged treatment may increase toxicity, treatment burden, and cost, while some patients may maintain durable disease control without continued therapy.
This randomized study aims to evaluate whether active surveillance after achieving tumor-free status is a feasible alternative to continued systemic immunotherapy in patients with extensive transurethrally unresectable very-high-risk NMIBC.
Patients will initially receive systemic immunotherapy-based treatment followed by disease evaluation using cystoscopy with biopsy and/or TURBT, urine cytology, urinary tumor DNA (utDNA), and imaging assessments. Patients who achieve tumor-free status after treatment and complete resection of visible disease will be randomized to either active surveillance or continued systemic immunotherapy.
The study will evaluate recurrence outcomes, bladder preservation, progression, safety, and patient management strategies following achievement of tumor-free status. The trial also aims to explore the role of urinary tumor DNA in identifying patients who may safely undergo treatment de-escalation and active surveillance.
調査の概要
状態
状態
条件
条件
介入・治療
介入・治療
研究の種類
研究の種類
入学 (推定)
入学
段階
段階
- フェーズ2
連絡先と場所
研究連絡先
研究連絡先
- 名前:Hailong Hu, MD
- 電話番号:+8619801518556
- メール:huhailong@tmu.edu.cn
研究連絡先のバックアップ
- 名前:Yunkai Qie, MD
- メール:qieyunkai@tmu.edu.cn
研究場所
-
-
-
Tianjin、中国
- General Hospital of Tianjin Medical University
-
コンタクト:
- Liang Wang
- 電話番号:+8615620530409
- メール:wjlmnwk@163.com
-
Tianjin、中国、300000
- The Second Hospital of Tianjin Medical University
-
コンタクト:
- Hailong Hu
- 電話番号:+8619801518556
- メール:huhailong@tmu.edu.cn
-
Tianjin、中国
- Tianjin Hospital
-
コンタクト:
- Guangbin Zhu
- 電話番号:+8613903124399
- メール:zgb2016@163.com
-
Xingtai、中国
- Xingtai People's Hospital
-
コンタクト:
- Junli Wei
- 電話番号:+8617299180245
- メール:wjluro@163.com
-
-
参加基準
適格基準
適格基準
就学可能な年齢
- 大人
- 高齢者
健康ボランティアの受け入れ
説明
Inclusion Criteria
- Has histologically confirmed very-high-risk non-muscle-invasive urothelial carcinoma of the bladder.
- Has transurethrally unresectable bladder tumor, defined as visually incomplete TURBT and/or extensive high-volume disease considered unsuitable for complete and oncologically adequate transurethral resection.
- Has undergone cystoscopy and TURBT evaluation before study enrollment.
- Has received systemic PD-1/PD-L1 inhibitor-based bladder-sparing therapy before randomization.
Has achieved tumor-free status before randomization, defined as:
- No visible bladder tumor on cystoscopy;
- Negative bladder biopsy and/or TURBT pathology;
- Negative urine cytology;
- Negative urinary tumor DNA (utDNA);
- No radiographic evidence of progression or metastasis.
- Has Eastern Cooperative Oncology Group (ECOG) performance status of 0, 1, or 2.
- Has adequate organ function.
- Has provided written informed consent.
Cohort A Only
- Achieved tumor-free status at the initial response evaluation after induction systemic therapy.
- Maintained tumor-free status after additional systemic therapy before randomization.
Cohort B Only
- Did not achieve tumor-free status at the initial response evaluation because of residual non-muscle-invasive disease.
- Subsequently underwent complete TURBT/resection of residual disease followed by additional systemic therapy.
- Achieved tumor-free status at the second response evaluation before randomization.
Exclusion Criteria
- Has muscle-invasive bladder cancer (≥T2), locally advanced unresectable disease, nodal disease, or distant metastasis.
- Has concurrent upper tract urothelial carcinoma.
- Has persistent visible tumor, positive bladder pathology, positive urine cytology, or positive utDNA before randomization.
- Has received prior systemic immunotherapy for metastatic urothelial carcinoma.
- Has active autoimmune disease requiring systemic treatment.
- Is receiving systemic immunosuppressive therapy.
- Has uncontrolled infection requiring systemic therapy.
- Has another active malignancy requiring systemic treatment.
- Has known active hepatitis B, hepatitis C, human immunodeficiency virus infection, or active tuberculosis.
- Has pregnancy or breastfeeding.
- Has any medical or psychiatric condition that, in the investigator's judgment, would interfere with study participation or interpretation of results.
研究計画
研究はどのように設計されていますか?
デザインの詳細
- 主な目的:処理
- 割り当て:ランダム化
- 介入モデル:並列代入
- マスキング:なし(オープンラベル)
アーム数
武器と介入
参加者グループ / アーム参加者グループ / アーム |
介入・治療介入・治療 |
|---|---|
|
実験的:Arm A-1 (Cohort A Active Surveillance)
Patients in Cohort A who achieve early tumor-free status after initial systemic immunotherapy-based treatment will undergo active surveillance with protocol-defined cystoscopy, urine cytology, urinary tumor DNA testing, biopsy as clinically indicated, and imaging assessments.
|
Patients undergo protocol-defined surveillance after achieving tumor-free status, including cystoscopy, biopsy as clinically indicated, urine cytology, urinary tumor DNA testing, and imaging assessments, without continued systemic PD-1/PD-L1 inhibitor therapy unless disease recurrence or progression occurs.
|
|
アクティブコンパレータ:Arm A-2 (Cohort A Continued Systemic Immunotherapy)
Patients in Cohort A who achieve early tumor-free status after initial systemic immunotherapy-based treatment will continue systemic immunotherapy for a protocol-defined duration with ongoing disease surveillance.
|
Patients continue protocol-defined systemic PD-1/PD-L1 inhibitor therapy after achieving tumor-free status for up to approximately 1 year, with ongoing surveillance including cystoscopy, urine cytology, urinary tumor DNA testing, and imaging assessments.
|
|
実験的:Arm B-1 (Cohort B Active Surveillance)
Patients in Cohort B who do not achieve tumor-free status at initial evaluation but subsequently achieve tumor-free status after complete TURBT/resection and additional systemic immunotherapy will undergo active surveillance with protocol-defined surveillance assessments.
|
Patients undergo protocol-defined surveillance after achieving tumor-free status, including cystoscopy, biopsy as clinically indicated, urine cytology, urinary tumor DNA testing, and imaging assessments, without continued systemic PD-1/PD-L1 inhibitor therapy unless disease recurrence or progression occurs.
|
|
アクティブコンパレータ:Arm B-2 (Cohort B Continued Systemic Immunotherapy)
Patients in Cohort B who subsequently achieve tumor-free status after complete TURBT/resection and additional systemic immunotherapy will continue systemic immunotherapy for a protocol-defined duration with ongoing disease surveillance.
|
Patients continue protocol-defined systemic PD-1/PD-L1 inhibitor therapy after achieving tumor-free status for up to approximately 1 year, with ongoing surveillance including cystoscopy, urine cytology, urinary tumor DNA testing, and imaging assessments.
|
この研究は何を測定していますか?
主要な結果の測定
主要な結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
|
Bladder-intact event-free survival (BI-EFS)
時間枠:Up to 2 years from randomization
|
Time from randomization to the first occurrence of high-risk NMIBC recurrence, progression to muscle-invasive bladder cancer, distant metastasis, radical cystectomy, or death from any cause.
|
Up to 2 years from randomization
|
二次結果の測定
二次結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
|
Recurrence-free survival (RFS)
時間枠:Up to 2 years from randomization
|
Time from randomization to the first documented recurrence of bladder cancer or death from any cause.
|
Up to 2 years from randomization
|
|
Progression-free survival (PFS)
時間枠:Up to 2 years from randomization
|
Time from randomization to progression to muscle-invasive, locally advanced, or metastatic bladder cancer, or death from any cause.
|
Up to 2 years from randomization
|
|
Radical cystectomy-free survival (RCFS)
時間枠:Up to 2 years from randomization
|
Time from randomization to radical cystectomy or death from any cause.
|
Up to 2 years from randomization
|
|
Overall survival (OS)
時間枠:Up to 2 years from randomization
|
Time from randomization to death from any cause.
|
Up to 2 years from randomization
|
|
Incidence of treatment-related adverse events
時間枠:Up to 2 years from randomization
|
Proportion of patients experiencing treatment-related adverse events, graded according to CTCAE.
|
Up to 2 years from randomization
|
その他の成果指標
その他の成果指標
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
|
Recurrence-Free Survival According to Urinary Tumor DNA Status
時間枠:Up to 2 years from randomization
|
Recurrence-free survival will be evaluated according to urinary tumor DNA status after achieving tumor-free status.
Urinary tumor DNA status will be assessed using a urine-based tumor DNA assay and categorized as positive or negative.
|
Up to 2 years from randomization
|
|
utDNA conversion during surveillance
時間枠:Up to 2 years from initial systemic administration
|
Proportion of patients with conversion from urinary tumor DNA negative to positive during follow-up.
|
Up to 2 years from initial systemic administration
|
|
Bladder-Intact Event-Free Survival According to Response Cohort in the Active Surveillance Arm
時間枠:Up to 2 years from randomization
|
Bladder-intact event-free survival will be compared between participants assigned to active surveillance in Cohort A and Cohort B.
|
Up to 2 years from randomization
|
|
Recurrence-Free Survival According to Response Cohort in the Active Surveillance Arm
時間枠:Up to 2 years from randomization
|
Recurrence-free survival will be compared between participants assigned to active surveillance in Cohort A and Cohort B.
|
Up to 2 years from randomization
|
|
Bladder-Intact Event-Free Survival According to Response Cohort in the Continued Systemic Immunotherapy Arm
時間枠:Up to 2 years from randomization
|
Bladder-intact event-free survival will be compared between participants assigned to continued systemic immunotherapy in Cohort A and Cohort B.
|
Up to 2 years from randomization
|
|
Recurrence-Free Survival According to Response Cohort in the Continued Systemic Immunotherapy Arm
時間枠:Up to 2 years from randomization
|
Recurrence-free survival will be compared between participants assigned to continued systemic immunotherapy in Cohort A and Cohort B.
|
Up to 2 years from randomization
|
協力者と研究者
捜査官
捜査官
- 主任研究者:Hailong Hu, MD、Department of Urology, The Second Hospital of Tianjin Medical University
研究記録日
主要日程の研究
研究開始 (推定)
研究開始
一次修了 (推定)
一次修了
研究の完了 (推定)
研究の完了
試験登録日
最初に提出
最初に提出
QC基準を満たした最初の提出物
QC基準を満たした最初の提出物
最初の投稿 (実際)
最初の投稿
学習記録の更新
投稿された最後の更新 (実際)
投稿された最後の更新
QC基準を満たした最後の更新が送信されました
QC基準を満たした最後の更新が送信されました
最終確認日
最終確認日
詳しくは
本研究に関する用語
キーワード
追加の関連 MeSH 用語
その他の研究ID番号
その他の研究ID番号
- Truce-LB03
個々の参加者データ (IPD) の計画
個々の参加者データ (IPD) を共有する予定はありますか?
IPD 共有サポート情報タイプ
- STUDY_PROTOCOL
- SAP
医薬品およびデバイス情報、研究文書
米国FDA規制医薬品の研究
米国FDA規制機器製品の研究
この情報は、Web サイト clinicaltrials.gov から変更なしで直接取得したものです。研究の詳細を変更、削除、または更新するリクエストがある場合は、register@clinicaltrials.gov。 までご連絡ください。 clinicaltrials.gov に変更が加えられるとすぐに、ウェブサイトでも自動的に更新されます。