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Neoadjuvant RC48 Plus Gemcitabine in HER2-Expressing MIBC

2026年7月6日 更新者:Zhiquan Hu

Neoadjuvant RC48 Plus Gemcitabine for HER2 1~3+ MIBC: A Prospective, Multicenter, Randomized, Controlled, Non-inferiority Study (GUARD-02)

Objectives: To evaluate the non-inferiority of disitamab vedotin plus gemcitabine versus disitamab vedotin plus toripalimab in terms of the pathological complete response (pCR) rate as neoadjuvant therapy for muscle-invasive bladder cancer (MIBC).

This study is designed to evaluate two parallel neoadjuvant treatment strategies followed by definitive local therapy and adjuvant treatment. Eligible patients will be assigned to either the Experimental Arm, receiving neoadjuvant Disitamab Vedotin (RC48) combined with Gemcitabine, or the Active Comparator Arm, receiving neoadjuvant RC48 combined with Toripalimab. Both neoadjuvant regimens are administered every two weeks for 3 to 6 cycles, contingent upon imaging-based tumor response. Following the neoadjuvant phase, patients from both arms will proceed to receive standard Radical Cystectomy (RC) combined with Pelvic Lymph Node Dissection (PLND) within four weeks of their final dose, with a trimodality therapy (TMT) bladder-sparing approach strictly restricted to a selected minority of patients. In the postoperative phase, eligible patients will receive adjuvant therapy consisting of RC48 plus Toripalimab for 6 cycles, followed by Toripalimab maintenance monotherapy for a duration of ≤ 1 year (or a maximum of 1 year).Patients post-RC require abdominopelvic/chest imaging q3-6m; non-RC patients need cystoscopy q3m and abdominopelvic/chest CT q3-6m. Follow-up staff should proactively contact patients q3m to record imaging findings and inquire about hematuria, stomal lesions, cough/chest pain, CNS symptoms, and accurately document recurrence/progression, metastasis, death with dates.

調査の概要

研究の種類

介入

入学 (推定)

170

段階

  • フェーズ 3

連絡先と場所

このセクションには、調査を実施する担当者の連絡先の詳細と、この調査が実施されている場所に関する情報が記載されています。

研究連絡先

研究場所

    • Anhui
      • Hefei、Anhui、中国、230022
        • 募集
        • The First Affiliated Hospital of Anhui Medical University
        • コンタクト:
          • Hanjiang Xu, M.D.
          • 電話番号:18326170623
        • 主任研究者:
          • Hanjiang Xu, M.D.
    • Fujian
      • Fuzhou、Fujian、中国、350001
        • 募集
        • Fujian Medical University Union Hospital
        • コンタクト:
        • 主任研究者:
          • Shaoxing Zhu, M.D.
      • Xiamen、Fujian、中国、361003
        • 募集
        • The First Affiliated Hospital of Xiamen University
        • 主任研究者:
          • Wei Li, M.D.
        • コンタクト:
          • Wei Li, M.D.
          • 電話番号:13666028912
    • Guangdong
      • Guangzhou、Guangdong、中国、510280
        • 募集
        • ZhuJiang Hospital of Southern Medical University
        • コンタクト:
        • 主任研究者:
          • Abai Xu, M.D.
      • Shenzhen、Guangdong、中国、518117
        • 募集
        • Cancer Hospital Chinese Academy of Medical Sciences, Shenzhen Center
        • コンタクト:
        • 主任研究者:
          • Dongwen Wang, M.D.
    • Hubei
      • Enshi、Hubei、中国、445000
        • 募集
        • The Central Hospital of Enshi Tujia and Miao Autonomous Prefecture
        • コンタクト:
          • Su Chen, M.D.
          • 電話番号:13477894099
        • 主任研究者:
          • Su Chen, M.D.
      • Huanggang、Hubei、中国、438000
        • 募集
        • Huanggang Central Hospital
        • コンタクト:
        • 主任研究者:
          • Jiayi Tao, M.D.
      • Huangshi、Hubei、中国、435000
        • 募集
        • Huangshi Central Hospital
        • コンタクト:
        • 主任研究者:
          • Dingwen Gui, M.D.
      • Jingmen、Hubei、中国、448000
        • 募集
        • Jingmen Central Hospital
        • コンタクト:
        • 主任研究者:
          • Zeming Liao, M.D.
      • Jingzhou、Hubei、中国、434020
        • 募集
        • Jingzhou Central Hospital
        • コンタクト:
          • Yixiang Liao, M.D.
          • 電話番号:18107167675
          • メール:25261193@qq.com
        • 主任研究者:
          • Yixiang Liao, M.D.
      • Jingzhou、Hubei、中国、434000
        • 募集
        • Jingzhou First People's Hospital
        • コンタクト:
        • 主任研究者:
          • Haitao Dai, M.D.
      • Shiyan、Hubei、中国、442000
        • 募集
        • Taihe Hospital
        • コンタクト:
          • Congbo Chen, M.D.
          • 電話番号:13907204825
        • 主任研究者:
          • Congbo Chen, M.D.
      • Wuhan、Hubei、中国、430071
        • 募集
        • Zhongnan Hospital of Wuhan University
        • コンタクト:
        • 主任研究者:
          • Xingyuan Xiao, M.D.
      • Wuhan、Hubei、中国、430060
        • 募集
        • Renmin Hospital of Wuhan University
        • コンタクト:
        • 主任研究者:
          • Zhiyuan Chen, M.D.
      • Wuhan、Hubei、中国、430079
        • 募集
        • Hubei Cancer Hospital
        • コンタクト:
        • 主任研究者:
          • Diansheng Cui, M.D.
      • Wuhan、Hubei、中国、430022
        • 募集
        • Wuhan No.1 Hospital
        • コンタクト:
        • 主任研究者:
          • Gaofeng Zhou, M.D.
      • Wuhan、Hubei、中国、430014
        • 募集
        • The Central Hospital of Wuhan
        • コンタクト:
        • 主任研究者:
          • Yonglian Guo, M.D.
      • Wuhan、Hubei、中国、430030
        • 募集
        • Department of Urology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology
        • コンタクト:
        • 主任研究者:
          • Zhiquan Hu, M.D.
        • 副調査官:
          • Chunguang Yang, M.D.
        • 副調査官:
          • Haijun Huang, M.M.
      • Xiangyang、Hubei、中国、441021
        • 募集
        • Xiangyang Central Hospital
        • コンタクト:
        • 主任研究者:
          • Bin Chen, M.D.
      • Yichang、Hubei、中国、443003
        • 募集
        • Yichang Central People's Hospital
        • コンタクト:
        • 主任研究者:
          • Xiaobo Chen, M.D.
    • Jiangxi
      • Nanchang、Jiangxi、中国、330006
        • 募集
        • Jiangxi Provincial People's Hospital
        • コンタクト:
          • Kehua Jiang, M.D.
          • 電話番号:18571225053
        • 主任研究者:
          • Kehua Jiang, M.D.
    • Shandong
      • Jinan、Shandong、中国、250117
        • 募集
        • Shandong Cancer Hospital And Institute
        • 主任研究者:
          • Jiasheng Bian, M.D.
        • コンタクト:

参加基準

研究者は、適格基準と呼ばれる特定の説明に適合する人を探します。これらの基準のいくつかの例は、人の一般的な健康状態または以前の治療です。

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

いいえ

説明

Inclusion Criteria:

  1. Informed Consent & Compliance: Provision of signed informed consent and ability to comply with study procedures and follow-up requirements.
  2. Age: Age 18 to 75 years (inclusive).
  3. Planned Surgery: Planned to undergo radical cystectomy (RC) with lymph node dissection (LND).
  4. Clinical Stage: Clinical stage T2-T4aNxM0, as assessed by CT, MRI, or PET-CT.
  5. Pathology & Biomarker: Histologically confirmed predominant urothelial carcinoma by cystoscopic biopsy or transurethral resection of bladder tumor (TURBT), with HER2 expression of 1+ to 3+ determined by immunohistochemistry (IHC).
  6. Performance Status: Eastern Cooperative Oncology Group (ECOG) performance status of ≤ 2.
  7. Adequate Organ Function: Laboratory values meeting the following criteria: Absolute neutrophil count (ANC) ≥ 1.5 × 10^9/L; Platelet count ≥ 100 × 10^9/L; Hemoglobin ≥ 80 g/L; Total bilirubin ≤ 1.5 × upper limit of normal (ULN); Aspartate aminotransferase (AST), alanine aminotransferase (ALT), and alkaline phosphatase (ALP) ≤ 2.5 × ULN
  8. Cardiac Function: New York Heart Association (NYHA) class < 3.
  9. Reproductive Status & Contraception: *Female: Must be surgically sterile, postmenopausal, or agree to use highly effective contraception during the study and for 6 months after the last dose of study treatment. Must not be lactating. *Male: Must agree to use a medically acceptable method of contraception (e.g., condoms, abstinence) during the study and for 6 months after the last dose of study treatment.

Exclusion Criteria:

  1. Receipt of live attenuated vaccine within 4 weeks prior to enrollment or planned receipt during the study period.
  2. Receipt of systemic chemotherapy, or anti-PD-1, anti-PD-L1, or HER2-targeted therapy within the past 6 months.
  3. Known hypersensitivity to gemcitabine, disitamab vedotin, toripalimab, or any of their excipients.
  4. Active, known, or suspected autoimmune disease.
  5. Known history of primary immunodeficiency.
  6. History of allogeneic organ transplantation or allogeneic hematopoietic stem cell transplantation.
  7. Untreated acute or chronic active hepatitis B virus (HBV) or hepatitis C virus (HCV) infection. (Patients receiving continuous antiviral therapy with monitored viral loads may be eligible at the investigator's discretion).
  8. Uncontrolled concurrent illness including, but not limited to: human immunodeficiency virus (HIV) infection, active or poorly controlled severe infection, or evidence of uncontrolled systemic disease (e.g., severe psychiatric/neurological disorders, decompensated respiratory failure).
  9. History of other malignancies within the past 5 years, excluding clinically cured early-stage tumors.
  10. Active tuberculosis.

研究計画

このセクションでは、研究がどのように設計され、研究が何を測定しているかなど、研究計画の詳細を提供します。

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:独身

武器と介入

参加者グループ / アーム
介入・治療
実験的:Experimental Arm (RC48 + Gemcitabine)
Patients in this arm receive neoadjuvant Disitamab Vedotin (RC48) at a dose of 2.0 mg/kg via intravenous (IV) infusion (60-90 minutes) on Day 1, followed by Gemcitabine 1000 mg/m² IV on Day 2. The regimen is administered every 2 weeks (Q2W). Tumor response is evaluated via imaging after 3 cycles. Patients who do not achieve a clinical complete response (cCR) will continue the treatment for an additional 3 cycles (totaling 3 to 6 cycles).
On Day 2 of each neoadjuvant therapy cycle, a dose of 1000 mg/m² is administered via intravenous infusion. The regimen is administered every 2 weeks (Q2W).
On Day 1 of each neoadjuvant therapy cycle, a dose of 2 mg/kg is administered via intravenous infusion over 30-60 minutes.
Patients are scheduled to undergo radical cystectomy (RC) within 4 weeks after the last dose of neoadjuvant therapy, and the postoperative specimens will be assessed for pathological response.
アクティブコンパレータ:Active Comparator Arm (RC48 + Toripalimab)
Patients in this arm receive neoadjuvant Disitamab Vedotin (RC48) at a dose of 2.0 mg/kg via IV infusion (60-90 minutes) on Day 1, followed by Toripalimab 3 mg/kg IV on Day 2. The regimen is administered every 2 weeks (Q2W). Tumor response is evaluated via imaging after 3 cycles, with treatment continuing for a total of 3 to 6 cycles based on the tumor response evaluation.
On Day 1 of each neoadjuvant therapy cycle, a dose of 2 mg/kg is administered via intravenous infusion over 30-60 minutes.
Patients are scheduled to undergo radical cystectomy (RC) within 4 weeks after the last dose of neoadjuvant therapy, and the postoperative specimens will be assessed for pathological response.
On Day 2 of each neoadjuvant therapy cycle, a dose of 3 mg/kg is administered via intravenous infusion. The regimen is administered every 2 weeks (Q2W).

この研究は何を測定していますか?

主要な結果の測定

結果測定
メジャーの説明
時間枠
Pathological Complete Response (pCR)
時間枠:Within 1 week after completion of radical cystectomy.
Defined as the absence of residual viable tumor cells (ypT0N0) in RC+PLND specimens. Assessed post-surgery. Method: A central pathology review committee performs centralized, blinded independent review of slides from all eligible patients. Sites ship de-identified slides and clinical forms to a central lab for uniform anonymization, QC, H&E staining, and supplementary IHC if needed. All materials are fully de-identified, presented in random order without clinical data. Two senior uropathologists (associate professor level or above) read independently; consensus is final, otherwise a third senior pathologist adjudicates blindly. ypT and ypN are recorded.
Within 1 week after completion of radical cystectomy.

二次結果の測定

結果測定
メジャーの説明
時間枠
Incidence of Grade ≥3 Treatment-Related Adverse Events (TRAEs) During Neoadjuvant Therapy
時間枠:The period starting from the first administration of neoadjuvant therapy and extending through 4 weeks following the last dose.
Defined as the proportion of patients in the safety set experiencing at least one Grade ≥3 TRAE (CTCAE v5.0) during neoadjuvant therapy. Assessed from the first cycle to 4 weeks after the last cycle, with comprehensive tests each cycle, a scheduled visit 1 week after the last dose of each cycle, and immediate evaluation upon any alert or complaint. Method: Uniform site training, structured eCRF recording of AE terms, dates, grades, relatedness, actions, outcomes. An independent Clinical Endpoint Committee (CEC) conducts centralized, blinded review of all Grade ≥3 events for final adjudication.
The period starting from the first administration of neoadjuvant therapy and extending through 4 weeks following the last dose.

その他の成果指標

結果測定
メジャーの説明
時間枠
Clinical Complete Response (cCR)
時間枠:Within 1 week after completion of radical cystectomy.
Defined as no clinical evidence of residual tumor in primary and regional nodes after neoadjuvant therapy, assessed hierarchically: surgical patients based on pathological pCR (ypT0/Tis ypN0); non-surgical patients based on imaging CR per RECIST 1.1 (target lesions disappear, nodes <10 mm, no new lesions). Assessed post-neoadjuvant. Method: Surgical patients use central pathology review (same as pCR); non-surgical patients use independent imaging review committee blinded to RECIST 1.1. A CEC reviews all data in blinded fashion, adjudicates cCR per hierarchy, ensuring uniformity.
Within 1 week after completion of radical cystectomy.
Event-Free Survival (EFS)
時間枠:From date of first neoadjuvant dose until the date of first documented events above, whichever came first, assessed up to 36 months.
Defined as time from neoadjuvant start to first occurrence of: ① disease progression (local/regional recurrence, distant metastasis, or definite clinical progression); ② death from any cause; ③ initiation of new anti-cancer therapy due to progression or toxicity. Censored at last known event-free assessment. Assessed at scheduled visits. Method: A central follow-up unit conducts structured symptom queries; any suspected event triggers medical evaluation. All potential event materials (imaging, records, symptom logs, death certificates) are submitted to an independent CEC for blinded adjudication of event and date, final for analysis.
From date of first neoadjuvant dose until the date of first documented events above, whichever came first, assessed up to 36 months.
Overall Survival (OS)
時間枠:From date of first neoadjuvant dose until the date of death from any cause, assessed up to 36 months.
Defined as time from neoadjuvant start to death from any cause. Assessed at scheduled visits. Method: Central follow-up unit collects objective death documents from multiple sources. The independent CEC reviews all documents in a fully blinded manner, verifies and adjudicates the exact date of death, which serves as the final basis for OS calculation.
From date of first neoadjuvant dose until the date of death from any cause, assessed up to 36 months.

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協力者

出版物と役立つリンク

研究に関する情報を入力する責任者は、自発的にこれらの出版物を提供します。これらは、研究に関連するあらゆるものに関するものである可能性があります。

研究記録日

これらの日付は、ClinicalTrials.gov への研究記録と要約結果の提出の進捗状況を追跡します。研究記録と報告された結果は、国立医学図書館 (NLM) によって審査され、公開 Web サイトに掲載される前に、特定の品質管理基準を満たしていることが確認されます。

主要日程の研究

研究開始 (推定)

2026年7月1日

一次修了 (推定)

2028年7月1日

研究の完了 (推定)

2029年7月1日

試験登録日

最初に提出

2026年6月28日

QC基準を満たした最初の提出物

2026年7月6日

最初の投稿 (実際)

2026年7月9日

学習記録の更新

投稿された最後の更新 (実際)

2026年7月9日

QC基準を満たした最後の更新が送信されました

2026年7月6日

最終確認日

2026年6月1日

詳しくは

本研究に関する用語

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?

未定

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

いいえ

米国FDA規制機器製品の研究

いいえ

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