ClinicalTrials.gg
RecruitingNCT06479811Updated Oct 6, 2026

[212Pb]VMT-Alpha-NET in Metastatic or Inoperable Somatostatin-Receptor Positive Gastrointestinal Neuroendocrine Tumors, Pheochromocytoma/Paragangliomas, Small Cell Lung, Renal Cell, and Head and Neck Cancers

A Phase 1 interventional study of [212Pb]VMT-alpha-NET and [203Pb]VMT-alpha-NET in Sinonasal Neuroendocrine Carcinoma, Nasopharyngeal Carcinoma and Esthesioneuroblastoma, sponsored by National Cancer Institute (NCI). Recruiting at 1 site in United States. Open to participants aged 18 Years to 120 Years. Per ClinicalTrials.gov, last updated 2026-10-06.

Sponsored by National Cancer Institute (NCI) · Phase 1, Interventional, and Treatment

From the registry’s dates

  • Started Aug 2025; still recruiting 1 year 2 months later.
Updated Oct 2, 2026Primary outcomes revisedEligibility revisedGo to Updates ↓

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Phase
Phase 1
Study type
Interventional
Enrollment
120
Allocation
Non-randomized
Ages
18 Years to 120 Years
Sex
All
01

Where this study stands

Counted across the records on this site · 2026-11-14

Among 13 studies in Nasopharyngeal Carcinoma by National Cancer Institute (NCI) — 5 open to participants now, 7 under way, 1 of them phase 3. Nasopharyngeal Carcinoma · National Cancer Institute (NCI).

Planned enrollment
4th of 10
120 · median 85
Started
2025
the only one that year
Phase 1
Only one
of the 13
Registered
11th of 13
by date

Among the 13 studies in Nasopharyngeal Carcinoma by National Cancer Institute (NCI), this one is the 4th largest by planned enrollment of the 10 interventional ones that give a count, is the only one that started in 2025, is the only one in phase 1, and was the 11th registered.

Nasopharyngeal Carcinoma

683 studies on the registry are indexed under Nasopharyngeal Carcinoma; 270 are open to participants now.

Browse Nasopharyngeal Carcinoma studies →

Open to participants now

5 of the 13 studies in Nasopharyngeal Carcinoma by National Cancer Institute (NCI) are open now, in 7 countries. Recruiting first, the newest first:

By country, each count listing its studies:

All 5 open studies →

Who these studies take

Of the 186 Nasopharyngeal Carcinoma studies recruiting now, 42 (23%) set no upper age limit and 135 (73%) stop at 75 or younger; 9 take children under 18; 8 take healthy volunteers.

This study: 18 Years to 120 Years · all sexes · no healthy volunteers.

The full table on the hub →

This tab as a report to print or save as PDF → With an account.

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Watch this landscapeDownload CSVNarrow it in search →With an account: a weekly mail of what changed among 13 studies in Nasopharyngeal Carcinoma by National Cancer Institute (NCI), or all of them as a file.
02

Study summary

Background:

Some cancers have high levels of proteins called somatostatin receptors (SSTRs) on the surface of the tumors. These tumors can be in the lung, head and neck, digestive tract, kidneys, and in or near the adrenal glands. Researchers want to know if drug treatments that target SSTRs can help shrink these types of tumors.

Objective:

To test a study drug ([212Pb]VMT-Alpha-NET) in people with tumors that have SSTRs.

Eligibility:

People aged 18 years and older with tumors of the lung, kidneys, head and neck, digestive tract, or adrenal glands that have SSTRs. Their tumors must have spread to other organs and cannot be removed with surgery.

Design:

Participants will be screened. They will have a physical exam with blood and urine tests. They will have imaging scans and a test of their heart function. A sample of tumor tissue may be collected if one is not already available.

[212Pb]VMT-Alpha-NET is given through a tube attached to a needle inserted into a vein. The drug will be given on the first day of four 8-week cycles. Participants will stay in the hospital for a few nights after each dose. They will have blood tests once a week during each cycle.

Some participants will also get imaging with a related study drug ([203Pb]VMT-Alpha-NET). They will receive this drug within 30 days before each cycle. At 1, 4, 24, and 48 hours after each [203Pb]VMT-Alpha-NET infusion and 4 hours after each [212Pb]VMT-Alpha-NET infusion, they will have optional whole body scans. These scans will show where the study drug went in their body. Following treatment, participants will be invited to the NIH Clinical Center 8 weeks after the last study drug administration for an end of treatment (EOT) visit. After EOT, visits will continue every 12 weeks for years 1-3 and every 6 months for years 4-6 or until disease progression. Beyond 6 years (or disease progression), participants will be contacted yearly to assess health status for 10 years after EOT.

Read the detailed description

Background:

  • Somatostatin receptors (SSTR) have been shown to be over-expressed in a number of human tumors, including gastrointestinal (GI) neuroendocrine tumors (NET), pheochromocytoma/paragangliomas (PPGL), small cell lung cancers (SCLC), kidney cancers (KC), and some head and neck (H\&N) cancers.
  • Targeted radioligand therapy (TRT) is a class of cancer therapeutic agents formed by attaching a radioactive isotope to a ligand that can target specific surface receptors such as SSTR on a tumor cell membrane. Efficacy is typically determined by the radiation dose deposited onto a tumor, which is determined by the radioactive isotope being used as well as the binding characteristics of the ligand-receptor/transporter pair.
  • Alpha emitters such as 212Pb emit alpha particles that are more damaging to tumor cells than beta emitters such as 177Lu. Therefore, TRT agents using alpha emitters are considered to be more potent than beta-emitting TRTs.
  • VMT-Alpha-NET is a peptide that binds to SSTR, which when attached to 212Pb becomes an alpha particle-emitting TRT that can be used to treat tumors that have SSTR surface expression.
  • [203Pb]VMT-Alpha-NET is the chemically identical imaging surrogate for [212Pb]VMT-Alpha-NET and has the same mechanism of action via binding to SSTR2. The nuclide 203Pb contained in [203Pb]VMT-Alpha-NET emits gamma radiation suitable for single-photon emission computerized tomography (SPECT) imaging. These images can be used to assess drug product biodistribution throughout the body.

Objective:

-To determine the maximum tolerated dose (MTD) of [212Pb]VMT-Alpha-NET (dose escalation cohort) and assess the safety of [212Pb]VMT-Alpha-NET at the MTD (dose expansions cohorts).

Eligibility:

  • Age >= 18 years.
  • Histopathologically confirmed GI NET, PPGL, SCLC, KC, or H\&N (nasopharyngeal carcinoma [NPC], olfactory neuroblastoma [ONB], sinonasal neuroendocrine carcinoma [SNEC]) cancers that are metastatic or inoperable.
  • No prior systemic radioligand therapy.
  • Eastern Cooperative Oncology Group (ECOG) Performance Status \<= 1.

Design:

  • This is an open-label, single-arm, single-center, phase I study evaluating the safety, preliminary efficacy, and pharmacokinetic properties of [212Pb]VMT-Alpha-NET in GI NET, PPGL, SCLC, KC, or H\&N cancers.
  • First, participants will be accrued in Dose Escalation Part with 4 dose levels to estimate MTD of [212Pb]VMT-Alpha-NET. Once MTD is estimated, the following participants with GI NET, PPGL, SCLC, KC, or H\&N cancers will be accrued in separate cohorts and treated at MTD of [212Pb]VMT-Alpha-NET.
  • [212Pb]VMT-Alpha-NET will be given IV every 8 weeks for a total of 4 administrations.
  • A subset of participants (Dosimetry Arm 1) will have [203Pb]VMT-Alpha-NET administration followed by whole body gamma scans combined with dosimetry SPECT/ Computed Tomography (CT) scans and collection of blood and urine samples prior each cycle.
  • Participants will have timed clinical laboratory evaluations, imaging studies, and research blood, and urine samples while on the study therapy for safety and efficacy evaluations.
  • Following completion of treatment, participants will be seen at the NIH Clinical Center approximately 8 weeks after the last study drug administration for an end of treatment (EOT) visit. After EOT, visits will continue every 12 weeks for years 1-3 and every 6 months for years 4-6 or until disease progression. Beyond 6 years (or after disease progression), participants will be contacted annually through any NIH-approved platform to assess for overall survival and health status for 10 years after the end of treatment visit (8 weeks after the last study drug administration).
03

Conditions studied

  • Sinonasal Neuroendocrine Carcinoma
  • Nasopharyngeal Carcinoma
  • Esthesioneuroblastoma
  • Olfactory Neuroblastoma
  • Somatostatin Receptor Positive
  • Small Cell Lung Cancers
  • Pheochromocytoma/Paragangliomas
  • Kidney Cancers
  • Head and Neck Tumors
  • Gastrointestinal Neuroendocrine Tumors

Keywords

  • 212Pb
  • Targeted alpha Therapy
  • Image-Guided Dosimetry
  • VMT-alpha-NET
04

Who can participate

The criteria were revised on the registry on Sep 29, 2026. See what changed

Ages eligible
18 Years to 120 Years
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

  • Participants must have histopathologically confirmed gastrointestinal neuroendocrine tumors (GI NET), pheochromocytoma/paraganglioma (PPGL), small cell lung cancers (SCLC), kidney cancers (KC), or Head \& Neck cancers (nasopharyngeal carcinoma [NPC], olfactory neuroblastoma [ONB], sinonasal neuroendocrine carcinoma [SNEC]) that are or inoperable per Standard of Care. Note: for KC, all histopathologies of kidney cancers are eligible as long as it is a primary renal neoplasm.
  • Required prior therapies:
  • GI NET, PPGL, H\&N: no specific prior therapy is needed.
  • SCLC: At least one prior line of standard of care systemic treatment such as chemotherapy and/or immunotherapy.
  • KC: Renal cell carcinoma (RCC) participants should have received at least one in the metastatic setting and should have received at least one Programmed cell death protein 1 (PD1) / Programmed death-ligand 1 (PDL1)-targeted as well as one agent targeting the VEGF pathway. Participants with fumarate hydratase (FH) deficient RCC should have received at least one prior line of systemic therapy (such as bevacizumab plus erlotinib). No prior therapy is needed for participants with other histologic subtypes.
  • Have NOT received prior systemic radioligand therapy for definitive therapeutic purposes. Prior external beam radiation therapy is allowed.
  • History of disease progression by imaging (e.g., 1.1) or clinically (defined as increase in severity or frequency of symptoms related to disease) within the past 36 months prior to the first dose of [203Pb]VMT-Alpha-NET.
  • Evidence of somatostatin receptors (SSTR) expression on at least 50% of the radiographically identifiable (i.e., visible on an anatomic scan such as CT or magnetic resonance imaging [MRI]) tumor, as indicated by a positive (uptake qualitatively identifiable as above the local background) on SSTR PET scan.
  • Age >= 18 years.
  • performance status \<=1.
  • Participants must have adequate organ and marrow function as defined below:

    • Leukocytes: 3,000/microliter
    • : 1,500/microliter
    • 100,000/microliter
    • >= 9.0 g/dL
    • Total : within normal institutional limits. Note: \<= 5 X institutional (ULN) if bilirubin elevation is due to a benign process such as Gilbert syndrome
    • : \<= 2.5 X institutional ULN
    • ALT: \<= 2.5 X institutional ULN
    • Creatinine: within normal institutional limits

OR

  • Calculated ( (eGFR): >= 60 mL/min/1.73 m\^2 for participants with creatinine levels above institutional normal

    • Participants with treated are eligible if follow-up brain imaging after central nervous system (CNS)-directed therapy shows no evidence of progression at screening.
    • Participants with new or progressive brain metastases or are eligible as long as the participant is asymptomatic and not requiring medication for symptom control from the brain lesions at screening.
    • Participants seropositive for (HIV) must:
  • be on effective anti-retroviral therapy; and
  • have an undetectable viral load at screening.

    • Participants seropositive for virus (HBV), must have HBV viral load undetectable at screening.
    • Participants seropositive for virus (HCV) must:
  • received curative treatment; and
  • have an undetectable HCV viral load at screening.

    • Individuals of (IOCBP) and individuals who can father children must agree to use an effective method of (barrier, hormonal, intrauterine device [IUD], surgical sterilization, abstinence) at study entry and at least 6 months after the last dose of the study agent(s).
    • Nursing participants must be willing to discontinue nursing from study treatment initiation through 6 months after the last dose of the study agents.
    • The ability of the participant to understand and the willingness to sign a written document.

Exclusion criteria

EXCLUSION CRITERIA:

  • Any agents should be stopped at least 28 days prior to the first dose of [203Pb]VMT-Alpha-NET.
  • Systemic therapy should be stopped at least 28 days prior to the first dose of [203Pb]VMT-Alpha-NET (participants with prior systemic therapies for their only, except participants with SCLC).
  • Systemic therapy should be stopped at least 14 days prior to the first dose of [203Pb]VMT-Alpha-NET (participants with SCLC only).
  • History of allergic reactions attributed to compounds of similar chemical or biologic composition to VMT-Alpha-NET.
  • Positive Beta human chorionic gonadotropin (Beta-HCG) serum or urine pregnancy test performed in IOCBP at screening.
  • > 450 ms on (EKG) at screening. Note: Framingham correction for QTc will be used.
  • History of or detection at screening of active/untreated secondary malignancy except nonmelanoma skin cancer and carcinoma in situ of the uterine cervix.
  • Uncontrolled intercurrent illness, factors, evaluated by medical history and physical exam which would potentially increase in the risk of the participant.
Terms in these criteria, in plain language(25)

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.

Metastases

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

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.

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.

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.

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.

Absolute neutrophil count (ANC)

The number of neutrophils, white blood cells that help fight infection, in a given amount of blood. Too few raises the risk of infection.

It is a count, not a percentage of the white cells. Limits are written in units that mean the same: ≥ 1.5 × 10⁹/L is ≥ 1,500 per mm³ (µL). Each lab has its own reference range.

Platelets

Blood cells that help blood clot. Too few raises the risk of bleeding and bruising. A usual adult range is about 150–400 × 10⁹/L (150,000–400,000 per µL); each lab has its own reference range.

Hemoglobin (Hb)

The protein in red blood cells that carries oxygen. A low level is anaemia, which can cause tiredness and breathlessness. Measured in g/dL or g/L (9 g/dL is 90 g/L).

Bilirubin

A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.

Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.

ULN (upper limit of normal)

The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.

“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.

ALT and AST (liver enzymes)

Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.

Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.

Creatinine clearance (CrCl)

How quickly the kidneys clear creatinine, a waste product, from the blood. A study may estimate it from a blood test with age, weight and sex (often by the Cockcroft–Gault formula), or measure it using blood and urine collected over a set time. Given in mL/min; higher is better.

GFR and eGFR (kidney filtering)

GFR (glomerular filtration rate) is how much blood the kidneys filter each minute. It is usually estimated from a blood test — eGFR, by formulas such as CKD-EPI or MDRD — and some studies ask for it to be measured directly instead. Usually given in mL/min/1.73 m².

Check the method, the units and the minimum the study states. A value of 90 or above is in the normal-or-high range, but kidney damage can show in other tests too.

Brain metastases

Cancer deposits in the brain from a cancer that started elsewhere in the body (CNS metastases include the spinal cord).

Studies differ: some leave out any brain metastases, some accept ones treated and stable for some weeks. Check what this study allows.

Leptomeningeal disease

Cancer that has spread to the leptomeninges, the thin layers covering the brain and spinal cord, and the fluid between them. It is not the same as brain metastases.

Criteria often treat it separately, and many studies leave it out even where treated brain metastases are allowed.

HIV

The human immunodeficiency virus, which weakens the immune system.

Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.

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.

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.

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.

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.

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.

QT and QTc

On an ECG, the QT interval is the time the heart’s lower chambers take to activate electrically and recover in each beat. QTc is that time adjusted for heart rate (QTcF by Fridericia’s formula, QTcB by Bazett’s). Some medicines lengthen it, and a long QTc can raise the risk of a dangerous heart rhythm.

The study may name a correction formula and a limit in milliseconds, often around 450–480.

ECG (electrocardiogram)

A recording of the heart’s electrical activity, taken with stickers on the chest, arms and legs. It takes a few minutes and does not hurt.

05

Study design

Phase
Phase 1
Primary purpose
Treatment
Allocation
Non-randomized
Intervention model
Sequential assignment
Masking
None (open label)
Enrollment
120 participants (estimated)

Study arms

  • Experimental
    1/Dosimetry Arm 1

    Escalating doses of \[212Pb\]VMT-alpha-NET, imaging with \[203Pb\]VMT-alpha-NET

    Drug: [212Pb]VMT-alpha-NET · Drug: [203Pb]VMT-alpha-NET · Drug: 68Ga-DOTATATE

  • Experimental
    2/Arm 2

    Escalating doses of \[212Pb\]VMT-alpha-NET

    Drug: [212Pb]VMT-alpha-NET · Drug: 68Ga-DOTATATE

  • Experimental
    3/Arm 3

    \[212Pb\]VMT-alpha-NET at MTD

    Drug: [212Pb]VMT-alpha-NET · Drug: 68Ga-DOTATATE

Interventions

  • \[212Pb\]VMT-alpha-NET will be given IV on Day 1 of every cycle for 4 cycles total at escalating doses in Phase I and at MTD during dose expansion. One cycle is 8 weeks.

  • Drug[203Pb]VMT-alpha-NET

    \[203Pb\]VMT-alpha-NET will be given IV within 30 days prior to each \[212Pb\]VMT-alpha-NET infusion.

  • 68Ga-DOTATATE PET/CT whole-body scanning will be done at different intervals to monitor disease.

06

What researchers measure

Primary outcomes

  1. MTD of [212Pb]VMT-alpha-NET (dose escalation cohort) and safety of [212Pb]VMT-alpha-NET at the MTD (dose expansions cohorts)

    The MTD will be presented as a recommended dose to be used in Dose Expansion Part for each disease group being studied.Descriptive tabulations of toxicity will be provided in Dose Expansion Part, along with the agent attribution determination and CTCAE grade for each toxicity event. The data will be presented as an absolute count of the event at a participant level as well as a percentage of total evaluable participants.

    Time frame: DLTs through 12 weeks after initial 212Pb]VMT-alpha-NET administration (dose escalation) and all toxicities from day 1 up through 6 years (dose expansion).

Secondary outcomes

  1. Dosimetry properties of [212Pb]VMT-alpha-NET via SPECT/CT, using [203Pb]VMT-alpha-NET as a surrogate with and without the administration of amino acids (Dosimetry Arm 1 only)

    Biodistribution and dosimetry data will be represented in a tabular format which indicates the percentage of the injected dose calculated to be in each of the major organs using gamma scan results. Radiation dose calculations will be performed using OLINDA/EXM software. Absorbed doses in organs and the whole body will be determined using the appropriate adult phantom (e.g., adult male, adult female). Tumor lesion absorbed doses will be determined using the sphere model in OLINDA.

    Time frame: After each SPECT/CT and gamma planar imaging and after every [203Pb]VMT-alpha-NET infusion (in Dosimetry Arm 1 only)

  2. PK properties of [212Pb]VMT-alpha-NET via blood and urine sampling

    PK data will be represented as a scatter plot graphing time vs. the amount of radioactivity found in blood and urine samples.

    Time frame: After every infusion of [212Pb]VMT-alpha-NET

  3. Overall Survival

    Kaplan-Meier curves of OS, will be constructed. Median OS will be reported with 95% confidence intervals.

    Time frame: Baseline until progression or 6 years after the end of treatment visit

  4. Safety of [203Pb]VMT-alpha-NET (dose escalation cohort) and [212Pb]VMT-alpha-NET

    Descriptive tabulations of toxicity will be provided, along with the agent attribution determination and CTCAE grade for each toxicity event. The data will be presented as an absolute count of the event at a participant level as well as a percentage of total evaluable participants.

    Time frame: Study duration

  5. Progression Free Survival

    PFS is defined as the duration of time from start of treatment to time of progression or death, whichever occurs first. Kaplan-Meier curves of PFS will be constructed. Median PFS and OS will be reported with 95% confidence intervals.

    Time frame: Baseline until progression or 6 years after the end of treatment visit

  6. Overall Response Rate

    The duration of overall response is measured from the time measurement criteria are met for CR or PR (whichever is first recorded) until the first date that recurrent or progressive disease is objectively documented (taking as reference for progressive disease the smallest measurements recorded since the treatment started). The overall response rate will be presented as a percentage along with 95% confidence intervals. Only evaluable participants will be included.

    Time frame: Baseline, weeks 12 and 32 during treatment, every 12 weeks after that until progression or 6 years after the end of treatment visit.

07

Study locations

1 of 1 sites recruiting
  • National Institutes of Health Clinical Center
    Bethesda, Maryland 20892, United States
    Recruiting
08

References and documents

Individual participant data

Plan to share: Yes — All IPD recorded in the medical record will be shared with intramural investigators upon request. This study will comply with the NIH Data Management and Sharing (DMS) Policy, which applies to all new and ongoing NIH-funded research in the IRP, as of January 25, 2023, that is associated with a ZIA, with a clinical protocol that undergoes scientific review.

Supporting information: Study protocol, Statistical analysis plan, Informed consent form

Time frame: Data from this study may be requested by other researchers after the completion of the primary endpoint.

Access criteria: Data from this study may be requested by contacting the PI.

09

Timeline

4 registry updates since Sep 25, 2026
ElapsedEstimatedEstimated, not yet reachedSimilar studies: half by the dot; the band is the middle halfHalf of similar studies reached it by the dot; the band is the middle half, from a quarter to three quarters

Started Aug 2025 (actual). Primary completion is estimated for Jan 2029, 40 months after the start.

Of 28 phase 1 interventional studies under Nasopharyngeal Carcinoma, half reached primary completion within 47 months of starting (the median), counting those still running; a quarter within 37 and three quarters within 75. This study's planned 40 months is below that.

How these figures are worked out, and which studies are left out of them.

Registered
Jun 27, 2024
First posted
Jun 28, 2024
StartActual
Aug 19, 2025
Primary completionEst.
Jan 1, 2029
CompletionEst.
Jan 1, 2032
Last update
Oct 6, 2026
What these dates mean
Start.
When the first participant enrolled; while estimated, when the study expects to open to recruitment.
Primary completion.
When the last participant was examined or treated to collect data for the study's main question, its primary outcome. A study that stopped early gives the date its data collection stopped.
Completion.
When the last participant's last visit took place, for every outcome, secondary ones and side effects included: the end of the study. Often later than primary completion, sometimes the same day.
Actual and Est.
Actual means the registry says the date has happened. Est. (estimated) is a date the sponsor plans or expects. It can still move, and the sponsor is expected to change it to actual once it has passed.
Eligibility
1 inclusion criterion edited
What changed in the criteria
Inclusion criteria
  • EditedIndividuals of child-bearing potential (IOCBP) and individuals who can father children must agree to use an effective method of contraception (barrier, hormonal, intrauterine device [IUD], surgical sterilization, abstinence) at study entry and up toat least 6 months after the last dose of the study agent(s).
Sep 29, 2026
Primary outcomes
1 time frame changed
What changed in the outcomes
  • Time frameMTD of [212Pb]VMT-alpha-NET (dose escalation cohort) and safety of [212Pb]VMT-alpha-NET at the MTD (dose expansions cohorts)DLTs through 12 weeks after initial 212Pb]VMT-alpha-NET administration (dose escalation) and all toxicities from day 1 up through 3 years (dose expansion). → DLTs through 12 weeks after initial 212Pb]VMT-alpha-NET administration (dose escalation) and all toxicities from day 1 up through 6 years (dose expansion).
Oct 2, 2026
Secondary outcomes
3 time frame changed
What changed in the outcomes
  • Time frameOverall Response RateBaseline, weeks 12 and 32 during treatment, every 12 weeks after that until progression or 3 years after the first [203Pb]VMT-alpha-NET infusion. → Baseline, weeks 12 and 32 during treatment, every 12 weeks after that until progression or 6 years after the end of treatment visit.
  • Time frameProgression Free SurvivalBaseline until progression or 6 years after receiving the first infusion of study drug → Baseline until progression or 6 years after the end of treatment visit
  • Time frameOverall SurvivalBaseline until progression or 6 years after receiving the first infusion of study drug → Baseline until progression or 6 years after the end of treatment visit
Oct 2, 2026
Show all 4 updates
  1. Oct 6, 2026
    Minor edits only
    + 1 other change: verification date
  2. Oct 2, 2026
    Primary outcomes 1 time frame changed
    What changed in the outcomes
    • Time frameMTD of [212Pb]VMT-alpha-NET (dose escalation cohort) and safety of [212Pb]VMT-alpha-NET at the MTD (dose expansions cohorts)DLTs through 12 weeks after initial 212Pb]VMT-alpha-NET administration (dose escalation) and all toxicities from day 1 up through 3 years (dose expansion). → DLTs through 12 weeks after initial 212Pb]VMT-alpha-NET administration (dose escalation) and all toxicities from day 1 up through 6 years (dose expansion).
    Secondary outcomes 3 time frame changed
    What changed in the outcomes
    • Time frameOverall Response RateBaseline, weeks 12 and 32 during treatment, every 12 weeks after that until progression or 3 years after the first [203Pb]VMT-alpha-NET infusion. → Baseline, weeks 12 and 32 during treatment, every 12 weeks after that until progression or 6 years after the end of treatment visit.
    • Time frameProgression Free SurvivalBaseline until progression or 6 years after receiving the first infusion of study drug → Baseline until progression or 6 years after the end of treatment visit
    • Time frameOverall SurvivalBaseline until progression or 6 years after receiving the first infusion of study drug → Baseline until progression or 6 years after the end of treatment visit
    + 3 other changes: verification date, description and arm descriptions
  3. Oct 1, 2026
    Minor edits only
    + 1 other change: verification date
  4. Sep 29, 2026
    Eligibility 1 inclusion criterion edited
    What changed in the criteria
    Inclusion criteria
    • EditedIndividuals of child-bearing potential (IOCBP) and individuals who can father children must agree to use an effective method of contraception (barrier, hormonal, intrauterine device [IUD], surgical sterilization, abstinence) at study entry and up toat least 6 months after the last dose of the study agent(s).
    + 1 other change: description

From the registry record's own update history. This site started tracking changes on Sep 25, 2026; for anything earlier, see the record history on ClinicalTrials.gov ↗

10

Registry details

Key details

Study ID
NCT06479811
Responsible party
Sponsor
First posted
Jun 28, 2024
Start date
Aug 19, 2025
Primary completion
Jan 1, 2029 (estimated)
Completion
Jan 1, 2032 (estimated)
Last update
Oct 6, 2026

Study contacts

Jessica K Turner
Contact
jessica.turner@nih.gov
(240) 858-7554
Frank I Lin, M.D.
Contact
frank.lin2@nih.gov
(240) 760-6166
Frank I Lin, M.D.
principal investigator · National Cancer Institute (NCI)

Oversight

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

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Studies of the drug tested here: Lead PB-212

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