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18F-TRX

Phase 1

Solid Tumor | Small molecule | Oncology |United Therapeutics Corporation|Last Updated: Jul 23, 2026

Success Probability

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Market & Valuation

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Trial Design

CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment56

FDA Designations

No designations recorded

Clinical trial landscape

18F-TRX · 1 trial · 10 indications

Phase 1 1
NCT06942104Imaging of Solid Tumors Using 18F-TRXSolid Tumor
RECRUITING56 Analytics
PHASE1RECRUITING
Imaging of Solid Tumors Using 18F-TRX
Solid TumorUnlock trial analytics

Study Endpoints

Primary Endpoints

Proportion of participants with treatment-emergent adverse events
Up to 7 days

The proportion of participants with any treatment-emergent adverse events will be reported by grade and frequency per the NCI Common Terminology Criteria for Adverse Events (NCI CTCAE) version 5.0. All participants who receive the radiotracer injection will be evaluable.

Secondary Endpoints

Median Target to Background Ratio (TBR) (Cohort 1)
Day of scan, 1 day
Mean radiation-absorbed doses (Cohort 1)
Day of scan, 1 day
Sensitivity of tumor lesion detection (Cohort 2)
Day of scan, 1 day
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelPARALLEL
PurposeDIAGNOSTIC

Treatment Arms

ArmTypeDescription
Cohort 1: Diagnostic (18F-TRX)EXPERIMENTALParticipants with any solid tumor malignancy with at least 3 metastatic lesions on conventional imaging will receive multiple scans lasting 220 minutes after injection. Participants undergo blood sample collection and may undergo tumor biopsy during screening
Cohort 2: Diagnostic (18F-TRX)EXPERIMENTALParticipants with WHO grade 3 or 4 glioma, locally advanced or metastatic clear cell renal cell carcinoma with at least three metastatic lesions on conventional imaging, or metastatic castration-resistant prostate cancer with at least one metastatic lesion on conventional imaging including cross-sectional imaging of the chest, abdomen and pelvis and whole body bone scan or prostate-specific membrane antigen (PSMA) PET scan (n = 30) will receive a single scan lasting 55-144 minutes after injection. Participants may undergo tumor biopsy during screening

Interventions

NameTypeDescription
18F-TRXDRUGGiven Intravenously (IV)
Positron Emission Tomography (PET)/Computerized tomography (CT)PROCEDUREImaging procedure
Tumor BiopsyPROCEDUREMay undergo tumor biopsy
Blood Specimen CollectionPROCEDUREUndergo blood sample collection
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Eligibility Criteria

Age Range18 Years to N/A
SexALL
Healthy VolunteersNo
Study Sites1

Inclusion Criteria: * Age ≥ 18 years * Advanced solid tumor malignancy in one of the following cohorts: * Cohort 1 (n = 6): Any solid tumor malignancy with at least 3 metastatic lesions on conventional imaging * Cohort 2 (n = 50): * WHO grade 3 or 4 glioma - patients with known (by integr...

Countries:United States
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Competitive Landscape -Other Solid Tumors 9 trials (matched to "Solid Tumor")

Frequently asked questions about 18F-TRX

What is 18F-TRX used for?

18F-TRX is an investigational small molecule being studied for use in imaging solid tumors, including solid carcinoma, castration-resistant prostate carcinoma, locally advanced and metastatic clear cell renal cell carcinoma, metastatic malignant solid neoplasm, stage III and IV renal cell cancer, stage IVB prostate cancer, and malignant glioma. It is currently in Phase 1 clinical development.

What does 18F-TRX target?

18F-TRX is a small molecule imaging agent. Its specific molecular target has not been disclosed in available information. It is being evaluated in a Phase 1 trial for imaging various solid tumors, including renal cell carcinoma, prostate cancer, and glioma.

Who makes 18F-TRX?

18F-TRX is being developed by United Therapeutics Corporation, a publicly traded company listed on the NASDAQ under the ticker symbol UTHR. The company is conducting a Phase 1 clinical trial to evaluate the imaging agent in patients with solid tumors.

What phase is 18F-TRX in?

18F-TRX is in Phase 1 clinical development. It is an investigational agent and has not been approved by the FDA. The ongoing Phase 1 trial is currently recruiting participants to evaluate its use in imaging solid tumors.

What clinical trials is 18F-TRX in?

18F-TRX is being studied in one active Phase 1 clinical trial with the identifier NCT06942104, titled 'Imaging of Solid Tumors Using 18F-TRX'. The trial is recruiting 56 participants in the United States and is open to adults aged 18 years and older with various solid tumors.