Metastatic Clear Cell Renal Cell CarcinomaPhase 1NCT07179770
Effects of Belzutifan on 89Zr-DFO-girentuximab PET Uptake in Patients With Renal Cell Carcinoma (RCC)
A Phase 1 study testing Belzutifan, 89Zr-DFO-girentuximab and 89Zr-DFO-girentuximab PET in people with Metastatic Clear Cell Renal Cell Carcinoma, run by NYU Langone Health at 1 site in United States.
Trial summary
The purpose of this study is to identify changes in Carbonic Anhydrase IX (CAIX) expression induced by hypoxia-inducible factor 2 alpha (HIF-2α) inhibition by initiating belzutifan single agent therapy and imaging CAIX expression with 89Zr-DFO-girentuximab PET before and 4 weeks after initiating treatment. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Metastatic Clear Cell Renal Cell Carcinoma
- What is being tested?
- Belzutifan, 89Zr-DFO-girentuximab and 89Zr-DFO-girentuximab PET
- Type of treatment
- Pill or oral medicine, Injection or infusion, Medical device
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 0 participants
- Where
- 1 siteUnited States
- Study dates
- 15 Sep 2025to 1 Oct 2028
- Phase
- Phase 1
- Are there results?
- None posted in the registry
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
- Histologically confirmed advanced clear cell RCC
- Radiographic disease progression to prior immune checkpoint inhibitor (ICI) therapy for RCC
- ICI for adjuvant therapy: Patients who experienced radiographic tumor progression during or within 6 months after last dose of adjuvant ICI
- ICI for locally advanced or metastatic disease: radiographic disease progression during or following ICI treatment in the 1st line setting
- Minimum two previous treatment regimens but no maximum limit
- Measurable disease per RECIST v1.1
Show all 27Show fewer
- Recovery to baseline or Grade1 NCI CTCAE v5.0 from toxicities related to any prior treatments, unless adverse events are clinically nonsignificant and/or stable in the opinion of the investigator.
- Age>18 years of age
- Karnofsky performance score ≥60%
- Patients must have adequate organ and marrow function as defined below:
- absolute neutrophil count ≥1,000/mcL
- platelets ≥100,000/mcL
- total bilirubin ≤ institutional upper limit of normal (ULN)
- Aspartate Aminotransferase (AST) (SGOT)/Alanine Aminotransferase (ALT) (SGPT ≤3 × institutional ULN
- creatinine ≤ institutional ULN OR
- glomerular filtration rate (GFR) ≥60 mL/min/1.73 m2 unless data exists supporting safe use at lower kidney function values, no lower than 30 mL/min/1.73 m2
- Patients with abnormal test results outside the allowable range, but are not clinically significant, may still enroll with PI's review and approval.
- Laboratory reference values should account for potential normal variations due to race, ethnicity, age, sex, and gender identity (e.g., due to surgical and/or hormonal changes).
- Human immunodeficiency virus (HIV)-infected patients on effective anti-retroviral therapy with undetectable viral load within 6 months are eligible for this trial.
- For patients with evidence of chronic hepatitis B virus (HBV) infection, the HBV viral load must be undetectable on suppressive therapy, if indicated.
- Patients with a history of hepatitis C virus (HCV) infection must have been treated and cured. For patients with HCV infection who are currently on treatment, they are eligible if they have an undetectable HCV viral load.
- Patients with treated brain metastases are eligible if follow-up brain imaging after central nervous system (CNS)-directed therapy shows no evidence of progression.
- Patients with new or progressive brain metastases (active brain metastases) or leptomeningeal disease are eligible if the treating physician determines that immediate CNS specific treatment is not required and is unlikely to be required during the first cycle of therapy.
- Patients with a prior or concurrent malignancy whose natural history or treatment does not have the potential to interfere with the safety or efficacy assessment of the investigational regimen are eligible for this trial.
- Patients with known history or current symptoms of cardiac disease, or history of treatment with cardiotoxic agents, should have a clinical risk assessment of cardiac function using the New York Heart Association Functional Classification. To be eligible for this trial, patients should be class 2B or better.
- Patients who agree to use an adequate method of contraception throughout the study period, starting with the administration of 89Zr-DFO-girentuximab,
- Ability to understand and the willingness to sign a written informed consent document.
Who cannot join
- Patients who have not recovered from adverse events due to prior anti-cancer therapy (i.e., have residual toxicities > Grade 1) with the exception of alopecia.
- Patients who are receiving any other investigational agents.
- History of allergic reactions attributed to compounds of similar chemical or biologic composition to girentuximab.
- Patients with uncontrolled intercurrent illness at the discretion of the investigator.
- Pregnant women are excluded from this study because belzutifan is an agent with the potential for teratogenic or abortifacient effects.
Trial locations and contacts
1 site in 1 country.
About this study
Official title: A Phase 1b Study to Assess the Effects of Belzutifan on 89Zr-DFO-girentuximab Uptake as a Surrogate to Determine CAIX Tumor Expression in Patients With Clear Cell Renal Cell Carcinoma
The purpose of this study is to identify changes in Carbonic Anhydrase IX (CAIX) expression induced by hypoxia-inducible factor 2 alpha (HIF-2α) inhibition by initiating belzutifan single agent therapy and imaging CAIX expression with 89Zr-DFO-girentuximab PET before and 4 weeks after initiating treatment. This will be the first study to evaluate potential changes in CAIX expression altered by belzutifan. Information gained from this study will be leveraged to develop combinations of belzutifan with CAIX targeted agents including radioimmunotherapy in the future.
- Being tested
- Belzutifan, 89Zr-DFO-girentuximab, 89Zr-DFO-girentuximab PET
- Medical subject headings
- Clear-cell metastatic renal cell carcinoma
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
BelzutifanDrug
Also called Welireg®
120 mg orally daily for 28 days
89Zr-DFO-girentuximabDrug
Also called TLX250-CDx
10 mg single slow intravenous (IV) administration
89Zr-DFO-girentuximab PETDevice
89Zr-DFO-Girentuximab PET before and after 4 weeks of treatment with standard-of-care (SOC) belzutifan.
| Study group | Role | What they receive |
|---|---|---|
| Previously treated metastatic clear cell RCC | Experimental | Patients will undergo imaging with [89Zr]Zr-DFO-girentuximab PET before and 28 days after treatment with belzutifan. Receives: Drug: Belzutifan; Drug: 89Zr-DFO-girentuximab; Device: 89Zr-DFO-girentuximab PET |
What is being measured
The primary outcome is the main question the study is designed to answer.
Change in Standardized Uptake Value (SUV) max uptake on 89Zr-DFO-girentuximab PET in ccRCC lesions between baseline and 4 weeks after initiation of belzutifan treatment
Measured: Baseline, Week 4
Standardized Uptake Value (SUV) peak uptake on 89Zr-DFO-girentuximab PET in ccRCC lesions between baseline and 4 weeks after initiation of belzutifan treatment
Measured: Baseline, Week 4
Occurrence of one or more grade 3 or higher toxicities by CTCAE v5 criteria
Measured: Week 4
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted18 Sep 2025
- Study start15 Sep 2025
- Primary completion1 Sep 2028 (estimated)
- Study completion1 Oct 2028 (estimated)
Why it stopped: PI Departure
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Metastatic Clear Cell Renal Cell CarcinomaStudies of the same condition, open and under way.
- More trials run by NYU Langone HealthThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
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 1
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 0 participants (actual)
Sponsor and investigators
- Lead sponsor
- NYU Langone Health
- Sponsor type
- University, hospital or other
- Collaborators
- National Cancer Institute (NCI)
- Responsible party
- Sponsor
- Investigators
- Minas Economides, MD, Principal investigator, NYU Langone Health
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07179770
- Sponsor's protocol ID
- 24-01254
- Other IDs
- 5K12CA270377-02
- Status last verified
- Oct 2026
- First submitted
- 11 Sep 2025
- Last updated
- 22 Oct 2026
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- Yes
- FDA-regulated device
- Yes
- Individual data sharing
- No: As this is a single institutional trial, individual participant data (IPD) will not be shared. This study will comply with the NIH Public Access Policy, which ensures that the public has access to the published results of NIH funded research. It requires scientists to submit final peer-reviewed journal manuscripts that arise from NIH funds to the digital archive PubMed Central upon acceptance for publication.
Study at a glance
From the registry record, last updated by the sponsor on 22 Oct 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Phase 1b Study to Assess the Effects of Belzutifan on 89Zr-DFO-girentuximab Uptake as a Surrogate to Determine CAIX Tumor Expression in Patients With Clear Cell Renal Cell Carcinoma
- ClinicalTrials.gov ID
- NCT07179770
- Acronym / sponsor ID
- 24-01254
- Phase
- Phase 1
- Study type
- Interventional
- Recruitment status
- WithdrawnReason stopped: PI Departure
- Enrolment
- 0 participants (actual)
- Lead sponsor
- NYU Langone HealthUniversity, hospital or other
- Collaborators
- National Cancer Institute (NCI)
- Study start
- 15 Sep 2025 (actual)
- Primary completion
- 1 Sep 2028 (estimated)
- Study completion
- 1 Oct 2028 (estimated)
- First posted
- 18 Sep 2025 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The purpose of this study is to identify changes in Carbonic Anhydrase IX (CAIX) expression induced by hypoxia-inducible factor 2 alpha (HIF-2α) inhibition by initiating belzutifan single agent therapy and imaging CAIX expression with 89Zr-DFO-girentuximab PET before and 4 weeks after initiating treatment. This will be the first study to evaluate potential changes in CAIX expression altered by belzutifan. Information gained from this study will be leveraged to develop combinations of belzutifan with CAIX targeted agents including radioimmunotherapy in the future.
Study design
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| Previously treated metastatic clear cell RCC | Experimental | Drug: Belzutifan, Drug: 89Zr-DFO-girentuximab, Device: 89Zr-DFO-girentuximab PETPatients will undergo imaging with [89Zr]Zr-DFO-girentuximab PET before and 28 days after treatment with belzutifan. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (27 listed)
- Histologically confirmed advanced clear cell RCC
- Radiographic disease progression to prior immune checkpoint inhibitor (ICI) therapy for RCC
- Measurable disease per RECIST v1.1
- Recovery to baseline or Grade1 NCI CTCAE v5.0 from toxicities related to any prior treatments, unless adverse events are clinically nonsignificant and/or stable in the opinion of the investigator.
- Age>18 years of age
Key exclusion criteria (5 listed)
- Patients who have not recovered from adverse events due to prior anti-cancer therapy (i.e., have residual toxicities > Grade 1) with the exception of alopecia.
- Patients who are receiving any other investigational agents.
- History of allergic reactions attributed to compounds of similar chemical or biologic composition to girentuximab.
- Patients with uncontrolled intercurrent illness at the discretion of the investigator.
- Pregnant women are excluded from this study because belzutifan is an agent with the potential for teratogenic or abortifacient effects.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| BelzutifanAlso: Welireg®120 mg orally daily for 28 days | Drug | Previously treated metastatic clear cell RCC |
| 89Zr-DFO-girentuximabAlso: TLX250-CDx10 mg single slow intravenous (IV) administration | Drug | Previously treated metastatic clear cell RCC |
| 89Zr-DFO-girentuximab PET89Zr-DFO-Girentuximab PET before and after 4 weeks of treatment with standard-of-care (SOC) belzutifan. | Device | Previously treated metastatic clear cell RCC |
Primary outcome
Change in Standardized Uptake Value (SUV) max uptake on 89Zr-DFO-girentuximab PET in ccRCC lesions between baseline and 4 weeks after initiation of belzutifan treatment
Time frame: Baseline, Week 4
Standardized Uptake Value (SUV) peak uptake on 89Zr-DFO-girentuximab PET in ccRCC lesions between baseline and 4 weeks after initiation of belzutifan treatment
Time frame: Baseline, Week 4
Occurrence of one or more grade 3 or higher toxicities by CTCAE v5 criteria
Time frame: Week 4
Results and safety
The study was withdrawn before enrolling participants, so there are no results.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 22 Oct 2026.
- Individual participant dataSharing planned: No. As this is a single institutional trial, individual participant data (IPD) will not be shared. This study will comply with the NIH Public Access Policy, which ensures that the public has access to the published results of NIH funded research. It requires scientists to submit final peer-reviewed journal manuscripts that arise from NIH funds to the digital archive PubMed Central upon acceptance for publication.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Minas Economides, MD principal investigator
NYU Langone Health
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 1 study testing Belzutifan, 89Zr-DFO-girentuximab and 89Zr-DFO-girentuximab PET in people with Metastatic Clear Cell Renal Cell Carcinoma, run by NYU Langone Health at 1 site in United States.
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 27 inclusion and 5 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: withdrawn, as of the sponsor's last update on 22 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 United States. 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 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
The study was withdrawn before enrolling participants, so there are no results.
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?
Change in Standardized Uptake Value (SUV) max uptake on 89Zr-DFO-girentuximab PET in ccRCC lesions between baseline and 4 weeks after initiation of belzutifan treatment (time frame: Baseline, Week 4). The study lists 3 primary outcomes in all. 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 22 Oct 2026.