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GEH200520/GEH200521

Phase 1

Healthy Volunteers | Small molecule | Other |GE HealthCare Technologies Inc.|Last Updated: Mar 6, 2026

Target and mechanism

ModalitySmall molecule

Also known as GEH200520 Injection and GEH200521 (18F) Injection, GEH200520 and GEH200521

Success Probability

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Market & Valuation

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Trial Design

CONTROLLEDDMCBiomarker
Total Trials1
Total Enrollment22

FDA Designations

No designations recorded

Clinical trial landscape

GEH200520/GEH200521 · 2 trials · 3 indications

Phase 1 2
NCT06398730A Phase 1, Dose-Escalation, Positron Emission Tomography Study to Assess the Safety, Pharmacokinetics, Dosimetry and Biodistribution of GEH200521 (18F) Injection Co-Administered With GEH200520 Injection in Healthy VolunteersHealthy Volunteers
COMPLETED22 Analytics
NCT05629689A Study to Evaluate GEH200520/GEH200521 (18F) Safety and Tolerability When Used for PET Scans in Patients With Solid Tumour MalignanciesMalignant Solid Tumor
RECRUITING50 Analytics
PHASE1COMPLETED
A Phase 1, Dose-Escalation, Positron Emission Tomography Study to Assess the Safety, Pharmacokinetics, Dosimetry and Biodistribution of GEH200521 (18F) Injection Co-Administered With GEH200520 Injection in Healthy Volunteers
Healthy VolunteersUnlock trial analytics
PHASE1RECRUITING
A Study to Evaluate GEH200520/GEH200521 (18F) Safety and Tolerability When Used for PET Scans in Patients With Solid Tumour Malignancies
Malignant Solid TumorUnlock trial analytics

Study Endpoints

Primary Endpoints

Incidence of all TEAEs
7 days

Incidence of all grading of TEAEs per National Cancer Institute's (NCI) Common Terminology Criteria for Adverse Events (CTCAE) Version 5.0 based on the causality to the IMPs.

Part A: The incidence of AEs upon causality to the IMPs.
Part A: 7 days
Part A: The severity of AEs per National Cancer Institute's Common Terminology Criteria for Adverse Events (NCI CTCAE version 5.0) upon causality to the IMPs.
Part A: 7 days
To evaluate the time-course changes in GEH200521 (18F) Injection uptake after immune-checkpoint inhibitor (ICI) treatment cycles compared to baseline.
Part B: 50 days

Secondary Endpoints

Radiation dosimetry and biodistribution of GEH200521 (18F) Injection after the GEH200520 Injection mass doses.
7 days
Optimal imaging window post-GEH200521 (18F) Injection after the GEH200520 Injection mass doses.
7 days
Mass dose of GEH200520 Injection followed by a fixed dose of GEH200521 (18F) Injection to achieve a diagnostic positron emission tomography (PET) image quality.
7 days
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Study Design & Arms

AllocationNON_RANDOMIZED
MaskingNONE
ModelSEQUENTIAL
PurposeDIAGNOSTIC

Treatment Arms

ArmTypeDescription
A non-radiolabeled GEH200520 - 1 mgEXPERIMENTAL -
A non-radiolabeled GEH200520 - 2 mgEXPERIMENTAL -
A non-radiolabeled GEH200520 - 4 mgEXPERIMENTAL -
A non-radiolabeled GEH200520 - 6 mgEXPERIMENTAL -
A non-radiolabeled GEH200520 - 8 mgEXPERIMENTAL -
A non-radiolabeled GEH200520 - 10 mgEXPERIMENTAL -
A non-radiolabeled GEH200520 - 12 mg or 15 mgEXPERIMENTAL -
Part A Cohort 1 - 1 mg doseEXPERIMENTAL1 mg mass dose of GEH200520 Injection with fixed dose of GEH200521 (18F) Injection administered together
Part A Cohort 2 - 2 mg doseEXPERIMENTAL2 mg mass dose of GEH200520 Injection with fixed dose of GEH200521 (18F) Injection administered together
Part A Cohort 3 - 4 mg doseEXPERIMENTAL4 mg mass dose of GEH200520 Injection with fixed dose of GEH200521 (18F) Injection administered together
Part A Cohort 4 - 8 mg doseEXPERIMENTAL8 mg mass dose of GEH200520 Injection with fixed dose of GEH200521 (18F) Injection administered together
Part A Cohort 5 (optional) - 12 or 15 mg doseEXPERIMENTAL12 or 15 mg mass dose of GEH200520 Injection with fixed dose of GEH200521 (18F) Injection administered together
Part A Cohort 6 - Optimal doseEXPERIMENTALSelected (optimal) mass dose as determined from results of Cohorts 1 through 5 of GEH200520 Injection with fixed dose of GEH200521 (18F) Injection administered together
Part BEXPERIMENTALSelected (optimal) dose of GEH200520 Injection from Part A with fixed dose of GEH200521 (18F) Injection administered together in 3 sequential repeat imaging visits

Interventions

NameTypeDescription
GEH200520 Injection and GEH200521 (18F) InjectionDRUGAdministration of GEH200520 Injection followed by GEH200521 (18F) Injection
Static - PET/CT scanDIAGNOSTIC_TESTRepeat whole body static scan starting 3 minutes after injection followed by a single whole body static scan at 2 to 3 hours after injection and 4 to 5 hours after injection
GEH200520 Injection / GEH200521 (18F) Injection - Part ADRUGAdministration of GEH200520 Injection followed within 2 to 4 minutes by GEH200521 (18F) Injection followed by a 10mL saline flush
Dynamic and Static - PET/CT scanDIAGNOSTIC_TESTDynamic whole-body PET/CT scan starting at the time of injection (sequential scans over 90 minutes anticipated) followed by static whole-body scans starting at 150 minutes, 270 minutes, and (optional) 24 hours after injection.
GEH200520 Injection / GEH200521 (18F) Injection - Part BDRUGAdministration of GEH200520 Injection followed within 2 to 4 minutes by GEH200521 (18F) Injection followed by a 10mL saline flush
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Eligibility Criteria

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

Inclusion Criteria: * The subject is able and willing to comply with all study procedures as described in the protocol, and has read, signed, and dated an informed consent form prior to any study procedures being performed. * The subject is male or female ≥18 years of age. * The subject has a body ...

Countries:United StatesNetherlands
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