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DFO-YS5

Phase 1

Bladder Cancer | Small molecule | Oncology |Kyntra Bio, Inc.|Last Updated: Jun 24, 2026

Target and mechanism

ModalitySmall molecule

Also known as [89Zr]DFO-YS5

Success Probability

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Market & Valuation

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Trial Design

UNCONTROLLEDDMC
Total Trials1
Total Enrollment40

FDA Designations

No designations recorded

Clinical trial landscape

DFO-YS5 · 1 trial · 12 indications

Phase 1 1
NCT07664397Imaging Study of [89Zr]DFO-YS5 for Cancer DetectionBladder Cancer
NOT YET_RECRUITING40 Analytics
PHASE1NOT YET_RECRUITING
Imaging Study of [89Zr]DFO-YS5 for Cancer Detection
Bladder CancerUnlock trial analytics

Study Endpoints

Primary Endpoints

Mean maximum standard uptake value (SUVmax-avg) on Positron Emission Tomography (PET) scan
Up to 8 days

A volume of interest (VOI) will be placed around each lesion, and the calculated maximum standard uptake value (SUVmax) will be recorded for each lesion. Adjusted SUVmax data will then be averaged across up to 15 lesions within a given patient (SUVmax-avg) at each time point. In order to avoid clustering effects, analyses will be limited to the five largest osseous metastases, five largest lymph node metastases, and five largest visceral/soft tissue metastases. Metastatic lesion location, size (bidimensional axial measurement), and SUVmax will be tabulated. This will be conducted for all lesions.

Median intra-tumoral SUVmax
Up to 8 days

The median and range for intra-tumoral SUVmax within metastatic lesions will be descriptively reported, to assess for intra-tumoral heterogeneity and differences in uptake by site of disease.

Tumor-to-background signal (Ratio)
Up to 8 days

The tumor-to-background signal refers to comparing the standardized uptake value (SUV) of a lesion (tumor) to the SUV of a nearby normal organ or tissue that serves as a "background" reference. The ratio of the tumor-to-background signal on PET scan (normal organ as background uptake values) will be calculated as the SUVmax of tumor divided by the SUV of background organ

Secondary Endpoints

Proportion of participants with reported treatment-emergent adverse events
Up to 8 days
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Study Design & Arms

AllocationNA
MaskingNONE
ModelSINGLE_GROUP
PurposeDIAGNOSTIC

Treatment Arms

ArmTypeDescription
Treatment ([89Zr]DFO-YS5)EXPERIMENTALParticipants will be administered a single, intravenous microdose (1.0 - 3.0 mCi) of \[89Zr\]DFO-YS5, followed by whole-body positron emission tomography (PET) imaging conducted 120-168 hours after \[89Zr\]DFO-YS5 administration (i.e., on Day 6-8). Participants will be followed for treatment-emergent adverse events for up to 35 days.

Interventions

NameTypeDescription
[89Zr]DFO-YS5DRUGGiven intravenously (IV)
Positron Emission Tomography (PET)-Magnetic resonance imaging (MRI)PROCEDUREParticipants may receive a whole-body PET-MRI or a whole body PET-CT
Positron Emission Tomography (PET)-Computerized tomography (CT)PROCEDUREParticipants may receive a whole-body PET-CT or a whole-body PET-MRI
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Eligibility Criteria

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

Inclusion Criteria: 1. Histological or cytological confirmation of malignant peripheral nerve sheath tumor, bladder cancer, or solid tumor neoplasm. 2. At least one soft tissue lesion measurable at 1 cm or greater in short axis measurement on cross sectional imaging such as Computerized tomography ...

Countries:United States
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Recent Changes (Last 90 Days)

LOWJun 24, 2026NCT07664397NEW_TRIAL: changed
LOWJun 24, 2026NCT07664397NEW_TRIAL: changed