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Muscle-Invasive Bladder Cancer (MIBC)Phase 2NCT07624201

Trastuzumab Rezetecan and Adebrelimab as Neoadjuvant Therapy for HER2-Positive Muscle-Invasive Bladder Cancer

A Phase 2 study testing Trastuzumab Rezetecan Combined with Adebelizumab in people with Muscle-Invasive Bladder Cancer (MIBC), run by Harbin Medical University at 1 site in China.

Active, not recruiting

Under way, not looking for participants. Everyone needed has enrolled. The study is still running.

Official record
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Trial summary

This study aims to evaluate the efficacy and safety of neoadjuvant trastuzumab rezetecan combined with adebrelimab for the treatment of HER2-positive muscle-invasive bladder cancer. Read more about this study

Who is it for?
Ages 18 years and older
Conditions the study is for
Muscle-Invasive Bladder Cancer (MIBC)
What is being tested?
Trastuzumab Rezetecan Combined with Adebelizumab
Could I receive a placebo?
No, everyone receives an active treatment
How many people
58 participants
Where
1 siteChina
Study dates
1 Jun 2026to 1 Jun 2029
Phase
Phase 2
Are there results?
Not yet: the study is under way

Key requirements

Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.

  • Ages 18 years and older
  • All sexes
  • No healthy volunteers
  • Adult, Older adult

Who may be able to join

  • Age ≥18 years.
  • ECOG performance status of 0 or 1.
  • Histopathologically diagnosed muscle-invasive bladder cancer (MIBC) (cT2-T4a, N0-1, M0).
  • Tumor tissue with HER2 expression (IHC 2+ or 3+) and suitable for radical cystectomy (RC) and transurethral resection of bladder tumor (TURBT).
  • No prior systemic chemotherapy.
  • At least one measurable lesion per RECIST v1.1 (spiral CT long diameter ≥10 mm or short diameter of enlarged lymph node ≥15 mm) before diagnostic surgery.
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  • Adequate organ function (no transfusion or hematopoietic growth factor within 2 weeks before blood count screening):
  • ANC ≥1.5×10⁹/L
  • PLT ≥100×10⁹/L
  • Hb ≥90 g/L
  • TBIL ≤1.5×ULN (except subjects with Gilbert's syndrome)
  • ALT and AST ≤2.5×ULN
  • Cr ≤1.5×ULN
  • LVEF ≥50%
  • QTcF ≤450 ms
  • Females of childbearing potential must agree to abstain from heterosexual intercourse or use reliable, effective contraception from signing informed consent until at least 120 days after the last dose of study drug; serum HCG must be negative within 7 days before starting study treatment; and must be non-lactating.
  • A female is considered of childbearing potential if she has reached menarche, is not postmenopausal (≥12 consecutive months of amenorrhea without other cause), and has not undergone sterilization surgery (e.g., hysterectomy, bilateral tubal ligation, or bilateral oophorectomy).
  • Male patients with partners of childbearing potential must agree to abstain from heterosexual intercourse or use reliable, effective contraception from signing informed consent until at least 120 days after the last dose of study drug. During the same period, male subjects must also agree not to donate sperm. Male subjects with pregnant partners must use a condom and no additional contraception is required.
  • Subjects voluntarily join the study, sign written informed consent, and are expected to have good compliance with the study protocol.

Who cannot join

  • Patients with any active autoimmune disease or history of autoimmune disease (including but not limited to: autoimmune hepatitis, interstitial pneumonia, uveitis, etc.); patients with vitiligo; patients with childhood asthma that has completely resolved and requires no intervention in adulthood may be included; patients with asthma requiring bronchodilators for medical intervention are excluded.
  • Patients currently using immunosuppressants or systemic corticosteroids for immunosuppressive purposes (dose >10 mg/day prednisone or equivalent) and continuing use within 2 weeks before the first dose.
  • History of severe allergic reactions to other monoclonal antibodies.
  • Subjects with untreated central nervous system (CNS) metastases; subjects who have received prior systemic, radical treatment for brain or leptomeningeal metastases (radiotherapy or surgery) may be included if imaging confirms stability for at least 1 month, systemic corticosteroid therapy (dose >10 mg/day prednisone or equivalent) has been discontinued for more than 2 weeks, and they are asymptomatic.
  • Hypertension that cannot be well controlled with antihypertensive medication (systolic blood pressure ≥140 mmHg or diastolic blood pressure ≥90 mmHg).
  • Poorly controlled cardiac clinical symptoms or diseases, including: 1) NYHA class ≥2 heart failure; 2) unstable angina; 3) myocardial infarction within 1 year; 4) clinically significant supraventricular or ventricular arrhythmias requiring treatment or intervention; 5) QTc >450 ms (male) or QTc >470 ms (female); 6) Left ventricular ejection fraction (LVEF) ≤50% (i.e., EF >50% is required for inclusion).
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  • Abnormal coagulation function (INR >2.0, PT >16 s), bleeding tendency, or currently receiving thrombolytic or anticoagulant therapy; prophylactic use of low-dose aspirin or low molecular weight heparin is permitted.
  • Bleeding events of grade ≥2 per CTCAE v6.0 within 4 weeks before the first dose.
  • Imaging shows tumor invasion into major blood vessels, or the investigator judges that the tumor has a very high possibility of invading major blood vessels during treatment, leading to fatal massive hemorrhage.
  • Arterial/venous thrombotic events within 6 months before the first dose, such as cerebrovascular accident (including transient ischemic attack, cerebral hemorrhage, cerebral infarction), deep vein thrombosis, and pulmonary embolism.
  • Patients who received prior chemotherapy (including platinum-based chemotherapy) or surgery less than 4 weeks before study drug administration; palliative radiotherapy less than 2 weeks before study drug administration; molecular targeted therapy (including other oral targeted drugs in clinical trials) within less than 5 half-lives before the first study drug dose, or prior treatment-related adverse events (excluding alopecia) not recovered to ≤CTCAE grade 1.
  • Patients with radiation enteritis caused by pelvic radiotherapy within 12 months before study drug administration.
  • Active infection, unexplained fever ≥38.5°C within 7 days before dosing, or baseline white blood cell count >15×10⁹/L.
  • Known history or evidence of interstitial lung disease or non-infectious pneumonitis that has required corticosteroid therapy; or patients who may interfere with the detection or management of suspected drug-related pulmonary toxicity.
  • History of immunodeficiency, including positive HIV serology, or other acquired or congenital immunodeficiency diseases, or known active tuberculosis.
  • Active hepatitis B virus (HBV) or hepatitis C virus (HCV) infection (HBV reference: HBsAg positive and HBV DNA ≥500 IU/ml; HCV reference: HCV antibody positive and HCV viral load > upper limit of normal).
  • Patients with another malignancy within the past 5 years or concurrently (excluding cured basal cell carcinoma of the skin and carcinoma in situ of the cervix; for patients with recurrent ovarian cancer with prior history of breast cancer, those with no recurrence for >3 years after radical breast cancer surgery are excluded).
  • Prior treatment with anti-PD-1, anti-PD-L1, anti-CTLA-4 antibodies (or any other antibodies targeting T-cell co-stimulatory or checkpoint pathways).
  • Receipt of live vaccine within 4 weeks before the first dose or possible receipt during the study period.
  • Pregnant or breastfeeding female patients.
  • Patients judged by the investigator to have other conditions that may affect the conduct of the clinical study, inability to comply with the protocol, or lack of cooperation, or patients at risk of study participation.

Trial locations and contacts

1 site in 1 country.

China1 site
  • Harbin Medical University Cancer Hospital

    Harbin

Other trials in China

About this study

Official title: Neoadjuvant Trastuzumab Rezetecan and Adebrelimab for HER2-positive Muscle-invasive Bladder Cancer: a Phase II, Prospective, Single-arm, Multicenter Trial

This study aims to evaluate the efficacy and safety of neoadjuvant trastuzumab rezetecan combined with adebrelimab for the treatment of HER2-positive muscle-invasive bladder cancer.

Read the detailed description

Bladder cancer is an aggressive malignancy with a poor prognosis, ranking 13th globally in cancer incidence and first among urological tumors in China, with an increasing trend observed in urban cancer surveillance. Traditional treatments, including radical cystectomy and platinum-based chemotherapy, have limitations such as chemotherapy resistance and reduced postoperative quality of life. Recently, immune checkpoint inhibitors and antibody-drug conjugates (ADCs) have become research hotspots. This prospective, single-arm, multicenter clinical study aims to preliminarily evaluate the efficacy and safety of Trastuzumab Rezetecan combined with Adebrelimab as neoadjuvant therapy for HER2-expressing muscle-invasive bladder cancer (MIBC). A total of 58 eligible patients will be enrolled. The study includes screening, neoadjuvant treatment, and follow-up periods. During screening, untreated HER2-expressing MIBC patients eligible for radical surgery will be enrolled, with the period from informed consent to first dose not exceeding 28 days. The neoadjuvant treatment consists of Trastuzumab Rezetecan 3.2 mg/kg Q3W and Adebrelimab 1200 mg Q3W for three cycles. Patients will undergo imaging and surgical assessment 3-4 weeks after the last neoadjuvant treatment; those meeting surgical criteria will receive either transurethral resection or radical cystectomy. In the follow-up period, patients who proceed to surgery after neoadjuvant treatment will undergo postoperative safety monitoring and long-term survival follow-up.

Being tested
Trastuzumab Rezetecan Combined with Adebelizumab

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

  • Trastuzumab Rezetecan Combined with AdebelizumabDrug

    Trastuzumab Rezetecan 3.2 mg/kg, Q3W, in combination with Adebrelimab 1200 mg, Q3W, for a total of 3 cycles. Subjects will undergo preoperative imaging and surgical eligibility assessment at 3-4 weeks after the last dose of neoadjuvant therapy. Those who meet the surgical criteria will receive either transurethral resection or radical resection.

Study groups in NCT07624201
Study groupRoleWhat they receive
Experimental GroupExperimentalTrastuzumab Rezetecan Combined with Adebelizumab
Receives: Drug: Trastuzumab Rezetecan Combined with Adebelizumab

What is being measured

The primary outcome is the main question the study is designed to answer.

  1. Pathological Complete Response

    Assessed by pathological evaluation of resected bladder cancer specimens after neoadjuvant therapy, defined as the proportion of patients with no residual tumor (pT0N0).

    Measured: Assessed post-surgery (radical cystectomy or TURBT) on resected tumor specimens after neoadjuvant therapy. Measured postoperatively, up to approximately 4 months after treatment start.

Secondary outcomes (7)
  1. Clinical Complete Response Rate

    Assessed by preoperative imaging (CT/MRI) and urine cytology after neoadjuvant therapy, defined as the proportion of patients with no residual tumor on imaging, negative urine cytology, and no evidence of nodal or distant metastasis.

    Measured: Assessed by preoperative imaging and surgical evaluation at 3-4 weeks after the last neoadjuvant dose. Up to approximately 4 months after treatment start.

  2. Pathological Downstaging Rate

    Assessed by postoperative pathological staging, defined as the proportion of patients with ypT < T2 and ypN = N0 after neoadjuvant therapy.

    Measured: Assessed simultaneously with pCR on postoperative pathological staging. Up to approximately 4 months after treatment start.

  3. Event-Free Survival

    Time from first dose to first occurrence of disease progression, recurrence, second primary tumor, or death from any cause.

    Measured: Time from treatment start to first occurrence of disease progression, recurrence, second primary tumor, or death. Continuously assessed during follow-up, maximum follow-up of 36 months.

  4. Overall Survival

    Time from first dose to death from any cause.

    Measured: Time from treatment start to death from any cause. Continuously assessed, maximum follow-up of 36 months.

  5. QoL Score

    Assessed using the EORTC QLQ-C30 V3.0 patient-reported questionnaire at screening, each treatment cycle, end of treatment, and follow-up visits.

    Measured: Assessed by EORTC QLQ-C30 V3.0 at screening, Day 1 of each 21-day cycle (3 cycles), pre-surgery, post-surgery q30d ×3, then q3m (Year 1) and q6m (Years 2-3), up to 36 months.

  6. Adverse event incidence

    AEs and laboratory abnormalities graded by NCI CTCAE v6.0; SAEs recorded separately; surgical endpoints (feasibility, delay/cancellation rate, procedure change, operation duration) collected from postoperative clinical records and surgical logs.

    Measured: AEs/SAEs/lab abnormalities collected from informed consent to 30 days post-last dose (safety follow-up). Surgical endpoints assessed postoperatively. Only treatment-related SAEs collected during survival follow-up, up to 36 months.

  7. Exploratory Biomarkers

    Blood and tumor tissue samples collected at baseline, during treatment, and at end of treatment to assess PD-L1, HER2, and other markers for correlation with efficacy (e.g., pCR, EFS).

    Measured: Blood and tumor samples at baseline, C2D1, C3D1 (21-day cycles), at progression, and at EOT (after 3 cycles/pre-surgery). Max collection ~4 months; no routine survival follow-up sampling.

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted3 Jun 2026
  2. Study start1 Jun 2026
  3. Primary completion1 Jun 2028 (estimated)
  4. Study completion1 Jun 2029 (estimated)

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Interventional
Phase
Phase 2
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrolment
58 participants (estimated)
IDs, dates and publications
ClinicalTrials.gov ID
NCT07624201
Sponsor's protocol ID
SHR-A1811-1316-BC
Status last verified
Oct 2026
First submitted
21 May 2026
Last updated
19 Oct 2026
Results posted
No
Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
Individual data sharing
No

Questions about this trial

What is this clinical trial studying?

A Phase 2 study testing Trastuzumab Rezetecan Combined with Adebelizumab in people with Muscle-Invasive Bladder Cancer (MIBC), run by Harbin Medical University at 1 site in China.

The full registered description is in the About this study section and the official record.

Who may be eligible to take part?

The sponsor lists 19 inclusion and 21 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.

Is this clinical trial currently recruiting?

The record says: under way, not looking for participants, as of the sponsor's last update on 19 Oct 2026. Status can change between updates, so confirm with the study contact before making plans.

Where is the study taking place?

The record lists 1 site in China. Whether a site is taking part right now should be confirmed with that site. See every site.

What are the possible benefits and risks?

They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.

What does this phase mean?

Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.

Not every study follows the same path, and some studies (observational studies, device studies) have no phase.

Are results available for this study?

This study is still under way. Results are not available in the source record yet.

How can a doctor refer a patient or contact the research team?

The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.

What does the primary outcome measure?

Pathological Complete Response (time frame: Assessed post-surgery (radical cystectomy or TURBT) on resected tumor specimens after neoadjuvant therapy. Measured postoperatively, up to approximately 4 months after treatment start.). It is what the study was designed to measure, not a finding.

Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?

No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.

How often is this information updated?

AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 19 Oct 2026.

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