Testing Sacituzumab Tirumotecan for Bladder Cancer

A Phase 1/2 Open-label Clinical Study to Evaluate the Safety and Efficacy of Intravesical Sacituzumab Tirumotecan (Sac-TMT, MK-2870) in Participants With Intermediate-risk Non-muscle Invasive Bladder Cancer (NMIBC)

Phase1; Phase2 Interventional Merck Sharp & Dohme LLC · NCT06637423

This study is testing a new treatment called Sacituzumab Tirumotecan for people with recurrent low-grade bladder cancer to see how safe it is and what the best dose is.

Quick facts

PhasePhase1; Phase2
Study typeInterventional
Enrollment32 (estimated)
Ages18 Years and up
SexAll
SponsorMerck Sharp & Dohme LLC Industry-sponsored
Drugs / interventionsSacituzumab
Locations13 sites (Bakersfield, California and 12 other locations)
Trial IDNCT06637423 on ClinicalTrials.gov

What this trial studies

This clinical trial aims to evaluate the safety and tolerability of Sacituzumab Tirumotecan in patients with recurrent low-grade non-muscle invasive bladder cancer. Participants will receive the drug directly in the bladder, and researchers will determine the maximum tolerated dose to inform future studies. The study focuses on patients with specific risk factors associated with their condition, ensuring a targeted approach to treatment.

Who should consider this trial

Good fit: Ideal candidates include individuals with recurrent low-grade non-muscle invasive bladder cancer who meet specific risk criteria.

Not a fit: Patients with newly diagnosed low-grade bladder cancer or a history of high-grade bladder cancer may not benefit from this study.

Why it matters

Potential benefit: If successful, this treatment could provide a new therapeutic option for patients with recurrent low-grade bladder cancer.

How similar studies have performed: Other studies have explored similar treatments for bladder cancer, but the specific use of Sacituzumab Tirumotecan in this context is relatively novel.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

The key inclusion criteria include but are not limited to the following:

* Has recurrent low-grade (Ta) Non-Muscle Invasive Bladder Cancer (NMIBC) in the bladder
* Must have visible tumor by cystoscopy within 12 weeks prior to first dose
* Has intermediate-risk NMIBC defined as 1 or more of the following risk factors:

  * Multiple tumors
  * \>1 occurrence of low-grade NMIBC within 1 year of the current diagnosis at Screening
  * Early recurrence (\<1 year) of the initial diagnosis of low-grade disease
  * Solitary tumor \>3 cm
  * Failure of prior intravesical treatment
* An Eastern Cooperative Oncology Group (ECOG) performance status of 0 to 2 assessed within 14 days prior to first dose

Exclusion Criteria:

The key exclusion criteria include but are not limited to the following:

* Newly diagnosed low-grade non-muscle invasive bladder cancer (Ta NMIBC) in the bladder
* Past or current history of high-grade (Ta or T1 or CIS) NMIBC, muscle invasive bladder cancer (MIBC) or metastatic urothelial carcinoma (UC)
* Has a condition that would prohibit normal voiding (or hold bladder voiding for 1 to 2 hours)
* Has history of documented severe dry eye syndrome, severe Meibomian gland disease, and/or blepharitis, or severe corneal disease that prevents and/or delays corneal healing
* Has active inflammatory bowel disease requiring immunosuppressive medication or previous history of inflammatory bowel disease (eg, Chron's disease, ulcerative colitis, or chronic diarrhea)
* Has uncontrolled, significant cardiovascular disease or cerebrovascular disease
* Known additional malignancy that is progressing or has required active treatment within the past 3 years
* History of (noninfectious) pneumonitis/interstitial lung disease that required steroids or has current pneumonitis/interstitial lung disease.

Where this trial is running

Bakersfield, California and 12 other locations

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Non-Muscle Invasive Bladder CancerLow GradeIntermediate RiskRecurrent Low-Grade
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.