ClinicalTrials.gg
RecruitingNCT05756569Updated Jul 29, 2026

Enfortumab Vedotin Plus Pembrolizumab for the Treatment of Locally Advanced or Metastatic Bladder Cancer of Variant Histology

A Phase 2 interventional study of Biospecimen Collection and Computed Tomography in Bladder Squamous Cell Carcinoma, Locally Advanced Bladder Carcinoma and Malignant Renal Pelvis Neoplasm, sponsored by Emory University. Recruiting at 4 sites in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-07-29.

Sponsored by Emory University · Phase 2, Interventional, and Treatment

From the registry’s dates

  • Started Sep 2023; still recruiting 3 years 1 month later.
Phase
Phase 2
Study type
Interventional
Enrollment
25
Allocation
Not applicable
Ages
18 Years and older
Sex
All
01

Study summary

This phase II trial tests how well enfortumab vedotin (EV) and pembrolizumab works in treating patients with bladder cancer of variant histology (a group of less common types of bladder cancer) that have spread to nearby tissue or lymph nodes (locally advanced) or that has spread from where it first started (primary site) to other places in the body (metastatic). Enfortumab vedotin is a monoclonal antibody, enfortumab, linked to an anticancer drug called vedotin. Enfortumab attaches to a protein called nectin-4 on cancer cells in a targeted way and delivers vedotin to kill them. It is a type of antibody-drug conjugate. Immunotherapy with monoclonal antibodies, such as pembrolizumab, may help the body's immune system attack the cancer, and may interfere with the ability of tumor cells to grow and spread. Giving enfortumab vedotin and pembrolizumab may kill more tumor cells in patients with locally advanced or metastatic bladder cancer of variant histology.

Read the detailed description

PRIMARY OBJECTIVE:

I. To evaluate the anti-tumor activity of the combination of enfortumab vedotin (EV) plus pembrolizumab by assessing the overall response rate (ORR) as measured by Response Evaluation Criteria in Solid Tumors (RECIST) 1.1.

SECONDARY OBJECTIVES:

I. To evaluate the efficacy of the combination as measured by progression free survival, overall survival, and duration of response.

II. To evaluate the safety as measured by incidence of adverse events assessed up to 2 years.

EXPLORATORY OBJECTIVE:

I. To assess tissue-based assays in archival tissue and correlative changes in peripheral T-cell subsets, myeloid derived suppressor cells (MDSC), blood inflammatory markers and cytokines.

OUTLINE:

Patients receive enfortumab vedotin intravenously (IV) and pembrolizumab IV on study. Patients also undergo computed tomography (CT) scan or magnetic resonance imaging (MRI), and collection of blood throughout the trial.

02

Conditions studied

  • Bladder Squamous Cell Carcinoma
  • Locally Advanced Bladder Carcinoma
  • Malignant Renal Pelvis Neoplasm
  • Malignant Ureter Neoplasm
  • Malignant Urethral Neoplasm
  • Metastatic Bladder Carcinoma
  • Stage III Bladder Cancer AJCC v8
  • Stage IV Bladder Cancer AJCC v8
  • Unresectable Bladder Carcinoma
  • Urachal Adenocarcinoma
  • Bladder Adenocarcinoma
03

In context

Ureteral Neoplasms

79 studies on the registry are indexed under Ureteral Neoplasms; 17 are open to participants now.

This study's planned enrollment of 25 is below the median of 54 across 64 interventional studies indexed under Ureteral Neoplasms.

Browse Ureteral Neoplasms studies →

Lead sponsor

Emory University is the lead sponsor of 1,405 studies on the registry; 225 are open to participants now.

Of its 237 completed or terminated interventional studies of FDA-regulated products, 178 (75%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.

Inclusion criteria

  • Male or Female
  • Age >= 18 years
  • (ECOG) performance status =\< 1 ( >= 70%)
  • disease or unresectable locally advanced disease
  • documented variant histology (nested, microcytic, micropapillary, lymphoepithelioma-like, plasmacytoid, giant cell, poorly differentiated, lipid-rich, clear cell, sarcomatoid) bladder cancer and non-urothelial bladder cancer of epithelial origin including squamous cell carcinoma and adenocarcinoma (urachal and non-urachal). Variant histology tumors and non-urothelial tumors of ureter, urethra, urachus, or renal pelvis are included. Patients with mixed cell type are eligible if the predominant histology (over 50%) is variant or non-urothelial. All histological classifications will follow the 2016 WHO Classifications.
  • Untreated or having received any number of
  • Tumor tissue samples must be available for submission prior to initiation of study treatment. If not, agree to undergo
  • Patients must have as defined by criteria 1.1 as at least one lesion that can be accurately measured in at least one dimension (longest diameter of >= 10 mm for non-nodal lesions or short axis of >= 15 mm for nodal lesions) on CT scan, MRI
  • Patients must have adequate organ and marrow function, within 28 days of cycle 1 day 1, at the discretion of the investigator
  • The effects of study drugs on the developing human fetus are unknown. For this reason, female of (FCBP) must have a negative serum or urine pregnancy test prior to starting therapy
  • FCBP and men treated or enrolled on this protocol must agree to use adequate (hormonal or barrier method of birth control; or abstinence) prior to study entry and for the duration of study participation. Additionally, FCBP and male subjects should use effective contraception for 6 months after the last dose. Should a woman become pregnant or suspect she is pregnant while she or her partner is participating in this study, she should inform her treating physician immediately. Male subjects must not donate sperm and female subjects must not donate ova from screening to 6 months after the last dose
  • A female of childbearing potential (FCBP) is a sexually mature woman who: 1) has not undergone a hysterectomy or bilateral oophorectomy; or 2) has not been naturally for at least 24 consecutive months (i.e., has had menses at any time in the preceding 24 consecutive months)
  • Completion of all previous therapy (including surgery, radiotherapy, chemotherapy, immunotherapy, or therapy) for the treatment of cancer >= 4 weeks before the start of study therapy
  • > 12 weeks as determined by the Investigator
  • Willingness and ability of the subject to comply with scheduled visits, drug administration plan, protocol-specified laboratory tests, other study procedures, and study restrictions
  • Evidence of a personally signed indicating that the subject is aware of the neoplastic nature of the disease and has been informed of the procedures to be followed, the experimental nature of the therapy, alternatives, potential risks and discomforts, potential benefits, and other pertinent aspects of study participation

Exclusion criteria

Exclusion Criteria:

  • The neuroendocrine histology (small cell and large cell carcinomas) and non-epithelial bladder tumors (e.g. bladder sarcoma, carcinosarcoma, paraganglioma, melanoma, primary lymphoma, and lymphoepithelioma-like carcinoma) are excluded.
  • Patients who have had chemotherapy or radiotherapy within 4 weeks prior to entering the study or those who have not recovered from adverse events due to agents administered more than 4 weeks earlier [i.e. ongoing toxicity (grade 2 or higher with the exception of alopecia) associated with prior treatment]
  • Patients who are receiving any other agents or an investigational device within 21 days before administration of first dose of study drugs
  • History of allergic reactions attributed to compounds of similar chemical or biologic composition to the agents used in study
  • Patients with ongoing sensory or motor neuropathy grade >= 2
  • Prior treatment or enrollment in a study with EV or PD1/ immune checkpoint inhibitor (including maintenance therapy)
  • Known uncontrolled diabetes mellitus with (HbA1c) >= 8% or HbA1c 7% to \< 8% with associated diabetes symptoms (polyuria or polydipsia) that are not otherwise explained
  • Active central nervous system (CNS)
  • Excluding the primary tumor leading to enrollment in this study, any other active (except for localized prostate cancer, definitively treated melanoma in-situ, basal or squamous cell carcinoma of the skin, or carcinoma in-situ of the bladder or cervix) within the past 24 months
  • Currently receiving systemic antimicrobial treatment for active infection or high dose (> 10mg of prednisone or equivalent)
  • A FCBP who has a positive urine pregnancy test at baseline or within 72 hours prior to receiving first study dose. If the urine test is positive or cannot be confirmed as negative, a serum pregnancy test will be required
  • Breastfeeding females
  • History of active disease that has required systemic treatment in the past 2 years (i.e. with use of disease modifying agents, corticosteroids or drugs), known (defined as hepatitis B surface antigen [HBsAg] reactive), known active virus (defined as HCV ribonucleic acid [mRNA] [qualitative] is detected) or tuberculosis
  • History of active keratitis or corneal ulcerations
  • History of allogenic tissue/solid organ transplant
  • Congestive heart failure Class 3 or 4, unstable angina pectoris, serious cardiac arrhythmias within 6 months prior to first dose of EV/pembrolizumab
  • Other uncontrolled current illness including, but not limited to, cardiac arrhythmia or psychiatric illness/social situations that would limit compliance with study requirements
Terms in these criteria, in plain language(24)

Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.

ECOG performance status

A scale of how much an illness limits everyday activity. For people being assessed to join a study, scores run from 0 (fully active) to 4; lower is more active.

0
Fully active, no restrictions.
1
Limited in strenuous activity, but walking and able to do light work, such as housework or office work.
2
Walking and able to look after yourself, but unable to work; up and about more than half of waking hours.
3
Able to look after yourself only in part; in bed or a chair more than half of waking hours.
4
Unable to look after yourself at all; in bed or a chair all day.

Studies most often ask for 0–1 or 0–2. Your doctor gives the score; the WHO scale uses the same steps. The full scale also has 5, which records death.

Karnofsky performance status (KPS)

A 0–100 scale of how well someone can carry out everyday activities. 100 is no complaints and no signs of illness; 70 is able to look after yourself but not to work or keep up normal activity; 50 is needing considerable help and frequent medical care.

Studies often ask for 60 or 70 and above. Your doctor gives the score.

Metastases

Cancer that has spread from where it began to other parts of the body. “Metastatic” cancer is cancer that has spread this way.

Histologically or cytologically confirmed

The diagnosis was confirmed by looking at a sample under a microscope: tissue from a biopsy or surgery (histology), or cells from a fluid or needle sample (cytology).

Your pathology report is the document that shows this.

Line of therapy

A line of therapy is one course of treatment, which may combine several drugs. First-line is the first course given; second-line follows when that stops working or is not tolerated.

“Two prior lines” means two courses that count separately under the study’s rules — not simply two drugs. Ask the study team if you are unsure how yours are counted.

Biopsy and archival tissue

A biopsy takes a small piece of tissue to examine. “Archival tissue” is a sample already taken, for example at diagnosis, and kept by the hospital.

Whether a stored sample will do depends on when it was taken, how much there is and what the study needs. Ask whether the study accepts your stored sample or needs a new biopsy.

Measurable disease

The amount of disease can be tracked with a defined measurement, so the study can see whether it shrinks or grows. It might be a tumour measured on a scan or, in some blood cancers such as myeloma, a marker measured in blood or urine.

The criteria or the study team say which measurement counts — having no tumour visible on a scan does not by itself rule you out.

RECIST

The standard rules for measuring tumours on CT or MRI scans, to tell whether a cancer is shrinking, stable or growing during treatment.

“Measurable disease per RECIST 1.1” usually means at least one tumour 10 mm or more at its longest on a CT scan, or a lymph node 15 mm or more across its short axis.

Childbearing potential

Able to become pregnant: from the first period until menopause, unless permanently unable to through surgery (removal of the womb, or of both ovaries or both fallopian tubes).

Criteria for people of childbearing potential usually ask for a negative pregnancy test and for contraception during the study and for a time after it.

Contraception

Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.

Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.

Postmenopausal

Periods have stopped for good: usually no period for 12 months in a row without another medical reason, sometimes confirmed by a blood test (FSH).

Investigational drug or device

A drug or device being studied in a clinical trial.

It may be new, or already approved and being studied for another use, dose or form. Criteria often leave out people who took part in another study of one within a recent period, commonly 30 days or five half-lives.

Life expectancy

The study doctor’s estimate of how long someone is likely to live. Criteria use it so that people can stay in the study long enough for it to answer its question.

Informed consent

Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.

You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.

Clinically significant

Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.

PD-1, PD-L1 and checkpoint inhibitors

PD-1, PD-L1 and CTLA-4 are proteins that act as brakes on the immune system. Checkpoint inhibitors, such as pembrolizumab or nivolumab, block them so the immune system can attack a cancer.

PD-L1 can also be measured in a tumour sample. Some scores count stained tumour cells only (TPS); others also count certain immune cells (CPS). The study names the score and the minimum it uses.

HbA1c

A blood test of average blood sugar over the past two to three months, given as a percentage or in mmol/mol. 6.5% (48 mmol/mol) or more is the usual threshold for diabetes, normally confirmed by a second test.

Cancer (malignancy)

Malignancy means cancer. Criteria about another or earlier malignancy ask whether you have had a different cancer, usually within a set number of years.

Some are commonly allowed, such as treated skin cancers other than melanoma and early cancers removed completely — check the exceptions this study lists.

Corticosteroids (steroids)

Anti-inflammatory medicines such as prednisone, prednisolone and dexamethasone — not the anabolic steroids used for muscle.

Studies differ in what they allow: check which steroid medicines, routes (tablets, injections, creams, inhalers, eye drops) and doses this study accepts.

Autoimmune disease

A condition in which the immune system attacks the body’s own tissues, such as rheumatoid arthritis, lupus, psoriasis, type 1 diabetes or inflammatory bowel disease.

Immunotherapy studies often leave out active autoimmune disease, and some name exceptions, such as thyroid disease on replacement hormone. Check the exceptions this study lists.

Immunosuppression

A weakened immune system. It can come from an illness, such as HIV or some blood cancers, or from medicines that turn the immune system down, for example after an organ transplant or for an autoimmune disease; steroids at higher doses count.

Read whether the line is about a condition or about medicines, and which medicines and doses it means.

Hepatitis B tests

Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.

Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.

Hepatitis C tests

Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.

After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.

NYHA class (heart failure)

The New York Heart Association’s four classes of how much heart failure limits physical activity.

I
No limits: ordinary activity causes no undue tiredness or breathlessness.
II
Slight limits: comfortable at rest, ordinary activity causes symptoms.
III
Marked limits: comfortable at rest, less than ordinary activity causes symptoms.
IV
Symptoms even at rest; any activity makes them worse.

Studies set their own limit — many outside heart failure leave out class III–IV, while heart failure studies may ask for a particular class. Check the class this study names.

05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
25 participants (estimated)

Study arms

  • Experimental
    Treatment (enfortumab vedotin, pembrolizumab)

    Patients receive enfortumab vedotin IV and pembrolizumab IV on study. Patients also undergo CT scan or MRI, and collection of blood throughout the trial.

    Procedure: Biospecimen Collection · Procedure: Computed Tomography · Drug: Enfortumab Vedotin · Procedure: Magnetic Resonance Imaging · Biological: Pembrolizumab · Other: Questionnaire Administration

Interventions

  • ProcedureBiospecimen Collection

    Undergo collection of blood

    Also known as: Biological Sample Collection, Biospecimen Collected, Specimen Collection

  • ProcedureComputed Tomography

    Undergo CT

    Also known as: CAT, CAT Scan, Computed Axial Tomography, Computerized Axial Tomography, Computerized Tomography, CT, CT Scan, tomography

  • Given IV

    Also known as: AGS 22ME, AGS-22M6E, Anti-Nectin 4 ADC ASG-22CE, Anti-nectin-4 Monoclonal Antibody-Drug Conjugate AGS-22M6E, ASG-22CE, Enfortumab Vedotin-ejfv, Padcev

  • ProcedureMagnetic Resonance Imaging

    Undergo MRI

    Also known as: Magnetic Resonance, Magnetic Resonance Imaging Scan, Medical Imaging, Magnetic Resonance / Nuclear Magnetic Resonance, MR, MR Imaging, MRI, MRI Scan, NMR Imaging, NMRI, Nuclear Magnetic Resonance Imaging

  • BiologicalPembrolizumab

    Given IV

    Also known as: Keytruda, Lambrolizumab, MK-3475, SCH 900475

  • OtherQuestionnaire Administration

    Ancillary studies

06

What researchers measure

Primary outcomes

  1. Overall response rate

    Will be measured by Response Evaluation Criteria in Solid Tumors version 1.1, and estimated by the Clopper-Pearson method with 95% confidence intervals.

    Time frame: Up to 2 years

Secondary outcomes

  1. Progression free survival

    Kalan-Meier method will be used to estimate median event time and 2-year survival rate with 95% confidence interval.

    Time frame: From treatment initiation until disease progression or death due to any cause, assessed up to 2 years

  2. Overall survival

    Kalan-Meier method will be used to estimate median event time and 2-year survival rate with 95% confidence interval.

    Time frame: From treatment initiation until death due to any cause, assessed up to 2 years

  3. Duration of response

    Determined by occurrence of complete response (CR) or partial response (PR) according to Response Evaluation Criteria in Solid Tumors (RECIST) version (v) 1.1.

    Time frame: From response initiation to progression or death, whichever occurs first, assessed up to 2 years

  4. Incidence of adverse events

    Graded according to the Common Terminology Criteria for Adverse Events version 5.0, and will be tabulated using descriptive statistics (mean, median, minimum, maximum, standard deviation).

    Time frame: Assessed up to 2 years

07

Study locations

4 of 4 sites recruiting
08

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Jul 29, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
09

Registry details

Key details

Study ID
NCT05756569
Lead sponsor
Emory University
Responsible party
Jacqueline Brown (Principal Investigator, Emory University) — Principal investigator
First posted
Mar 6, 2023
Start date
Sep 26, 2023
Primary completion
Dec 16, 2026 (estimated)
Completion
Dec 16, 2027 (estimated)
Last update
Jul 29, 2026

Study contacts

Jacqueline Brown, MD
Contact
jacqueline.theresa.brown@emory.edu
404-778-1900
Jacqueline Brown, MD
principal investigator · Emory University Hospital/Winship Cancer Institute

Oversight

Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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Studies of the drugs tested here: Enfortumab vedotin · Pembrolizumab

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