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Pilot Study Evaluating Tumor Microenvironment Interaction in Solid Tumor Patients

Study Evaluating 68Ga-FAPI-46 Tumor Microenvironment Interaction in Solid Tumor Patients

Status
Withdrawn
Phases
Early Phase 1
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06922825
Enrollment
0
Registered
2025-04-11
Start date
2027-01-01
Completion date
2032-09-01
Last updated
2026-01-21

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

Conditions

Cancer, Malignancy, Solid Tumor Cancer, Solid Tumor Malignancy

Keywords

Immunotherapy, anti-body based therapy, abt, antibody based therapy, anti body based therapy, cancer, malignancy, solid tumor

Brief summary

This pilot study aims to compare PET/CT imaging using 68Ga-FAPI-46 to imaging results from standard MRI or CT with contrast in patients with solid tumors undergoing biologic therapy. A total of 50 participants will receive an intravenous injection of 68Ga-FAPI-46 and undergo a PET/CT scan shortly after received the study drug. Imaging will occur before starting standard antibody-based therapy. Participants will then proceed with their treatment, and the study team will monitor them through chart reviews for up to 36 months to evaluate treatment response and any correlation with tumor uptake observed on PET/CT scans.

Detailed description

This is a pilot study to compare PET/CT uptake of 68Ga-FAPI-46 to uptake parameters determined by Standard of Care MRI or CT with contrast. Patients with a solid tumor diagnosis who are scheduled to undergo biologic therapy will be included in the study. Following imaging, patients will begin standard of care antibody based therapy and standard of care follow-up. This study is an open label, single institution, pilot study to determine if 68-Ga-FAPI-46 can predict tumor uptake in patients with solid tumor and if the 68-Ga-FAPI-46 uptake in the tumor positively correlates with response to antibody based therapies. A total of 50 subjects will be enrolled in the study. Imaging will take place prior to initiation of treatment. Patients will then be administered an intravenous injection of 68-Ga-FAPI-46 after which subjects will undergo a PET/CT scan shortly after receiving the drug. Subjects will then undergo treatment as determined by their primary team. The study team will chart review subjects for 36 months ± 6 months with the possibility of extending this follow-up depending on immunotherapy treatment duration to extract treatment response information as documented by their primary treatment team. Total duration of active participation per patient may last approximately 45 days. The study will take around 84 ± 6 months from the time the study opens to accrual. The total duration per patient from time of enrollment to chart review is 36 ± 6 months.

Interventions

DRUG68Ga-FAPI-46

Participants will receive an IV injection of 68Ga-FAPI-46. Then, shortly after will undergo a PET/CT imaging using the 68Ga-FAPI-46. Additionally, MRI or contrast CT imaging will be conducted, either on the same day or within 14 days.

Sponsors

Eben Rosenthal
Lead SponsorOTHER
Vanderbilt University Medical Center
CollaboratorOTHER
Vanderbilt-Ingram Cancer Center
CollaboratorOTHER

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
BASIC_SCIENCE
Masking
NONE

Eligibility

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

Inclusion criteria

* Age ≥ 19 years. * Biopsy confirmed diagnosis of solid tumor malignancy scheduled to undergo antibody-based therapy * Subjects diagnosed with any stage of disease who will undergo immunotherapy treatment. * Have acceptable kidney function and clinical lab values.

Exclusion criteria

* Myocardial infarction (MI); cerebrovascular accident (CVA); uncontrolled congestive heart failure (CHF); significant liver disease; or unstable angina within 6 months prior to enrollment * Females who are currently pregnant or breastfeeding * Severe renal disease or anuria * Inability to lie flat or remain still for the duration of the scan.

Design outcomes

Primary

MeasureTime frameDescription
Determine the correlative relationship between 68Ga-FAPI-46 and tumor uptake.Day 1 Scan to Day 15 Scan.PET/CT uptake of 68Ga-FAPI-46 will be compared to uptake parameters determined by MRI or CT with contrast.

Secondary

MeasureTime frameDescription
Assess the ability of 68Ga-FAPI-46 to predict response to ABTDay 1 Scan to Day 30 follow up with physicianPET/CT imaging with 68Ga-FAPI-46 agent administration (study drug) will be compared to predictive capability of conventional scoring systems (e.g., PD-L1 CPS) scoring from patient biopsy specimens (gold standard). Treatment response values will be determined by the patient's primary treatment team per standard of care assessment. The analysis is exploratory, intended to generate preliminary data for future studies. The proposed sample size is 50 subjects, with approximately two-thirds undergoing contrast-enhanced CT and one-third undergoing MRI. Based on simulations, the margin of error for a 95% confidence interval is expected to range from 0.13 to 0.26 for n = 37, depending on the true correlation (0.8 to 0.5), and from 0.21 to 0.37 for n = 13.

Countries

United States

Contacts

STUDY_DIRECTOREben Rosenthal, MD

Vanderbilt University/Ingram Cancer Center

Outcome results

None listed

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