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A Safety Study of 212Pb-Pentixather Radioligand Therapy

Biodistribution of 68Ga Pentixafor in Patients With Small Cell Lung Carcinoma (SCLC)

Status
Not yet recruiting
Phases
Early Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT05557708
Enrollment
20
Registered
2022-09-28
Start date
2026-07-01
Completion date
2030-06-30
Last updated
2025-07-08

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Carcinoid Tumor Lung, Carcinoma, Small-Cell Lung, Neuroendocrine Tumor of the Lung

Keywords

radioligand therapy, pentixather, Lead 203, Lead 212, alpha therapy, dosimetry

Brief summary

This is a first-in-human clinical trial evaluating the safety of an alpha-radiation treatment (Lead-212 labelled Pentixather) in patients who have been diagnosed with, and previously treated, for atypical carcinoid lesions of the lung.

Detailed description

This is a study to determine what dose is acceptably safe for further testing. In this study, participants are asked to: * undergo SPECT/CT imaging with Lead-203 Pentixather (a radiotracer) to ensure the tumor lesions have the needed receptors * undergo serial blood sampling for during and after the SPECT/CT scan for radiation and dosimetry calculations (to determine how much of the Lead-212 Pentixather to administer) * receive up to 2 infusions of arginine & lysine as a kidney protectant * receive up to 2 infusions of Lead-212 Pentixather, 6 weeks between each infusion * undergo imaging at 3 months post treatment to determine disease response

Interventions

DRUG212-Lead Pentixather

Pentixather radiolabeled with 212-lead to target malignant cells with the CXCR4 ligand.

DIAGNOSTIC_TEST203-Lead Pentixather SPECT/CT

Pentixather radiolabeled with 203-Lead to identify the CXCR4 ligand on the malignant lesions for dosimetric analysis and treatment planning.

Sponsors

National Institutes of Health (NIH)
CollaboratorNIH
National Cancer Institute (NCI)
CollaboratorNIH
Holden Comprehensive Cancer Center
CollaboratorOTHER
Yusuf Menda
Lead SponsorOTHER

Study design

Allocation
NA
Intervention model
SEQUENTIAL
Primary purpose
TREATMENT
Masking
NONE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* ability to provide independent consent * adequate bone marrow function (platelet count ≥ 100,000; hemoglobin of ≥ 10 g/dL; neutrophil count ≥ 1,500 cells/mm3) * adequate kidney function (creatinine clearance of ≥ 50 mL/min using the Cockcroft-Gault equation * adequate liver function (serum bilirubin ≤ 3x the upper limit of normal, AST ≤ 5x the upper limit of normal, and ALT ≤ 5x the upper limit of normal) * failed initial therapy or declined further therapy known to confer benefit * have at least one lesion ≥ 2 cm that is positive for CXCR4 as demonstrated by Lead-203 Pentixather SPECT/CT

Exclusion criteria

* major surgery within 4 weeks of consent * antoher investigational agent within 4 weeks of consent * uncontrolled illness including, but not limited to, ongoing or active infection that would necessitate a delay in therapy or cause a hospital admission, symptomatic congestive heart failure, unstable angina pectoris, cardiac arrhythmia, hepatic cirrhosis or severe impairment, or psychiatric illness/social situations that would limit compliance with study requirements. * prior solid organ transplant * cytotoxic or antineoplastic therapy within 21 days of consent (42 days for nitrosoureas) * antibody therapy within the 21 days of consent * allogenic bone marrow or stem cell transplant, or any stem cell infusion, within 84 days of consent * pregnancy * breastfeeding * refusal to comply with birth control requirements during study

Design outcomes

Primary

MeasureTime frameDescription
Determine the recommended phase 2 dose of 212-Lead Pentixather3 monthsThe recommended phase 2 dose is based on the number of dose limiting toxicities observed post-treatment.

Secondary

MeasureTime frameDescription
Determine the targeting of atypical pulmonary neuroendocrine tumor and/or neuroendocrine carcinoma lesions with 203-Lead Pentixather SPECT/CTbaselineThe number of lesions identified with 203-Lead Pentixather SPECT/CT will compared to FDG PET/CT and diagnostic CT scans at baseline.
Determine tumor response3 monthsTumor response will be assessed using the Response Evaluation Criteria in Solid Tumours (RECIST, v 1.1).

Countries

United States

Contacts

Primary ContactYusuf Menda, MD
yusuf-menda@uiowa.edu319-356-3214
Backup ContactKellie Bodeker, Ph.D.
kellie-bodeker@uiowa.edu319-384-9425

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026