This is a Phase 1, single-center, open-label, single-arm, dose-escalation positron emission tomography study to assess the safety and tolerability, immunogenicity, Pharmacokinetics, dosimetry, and biodistribution after GEH200521 (18F) Injection is co-administered with GEH200520 Injection in healthy volunteers. The estimated study duration for each subject is approximately 28 days in part A and 34 days in part B. The primary study objective is to evaluate the safety and tolerability of the IMPs, the selected mass doses of GEH200520 Injection co-administered with a fixed dose of GEH200521 (18F) Injection.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
DIAGNOSTIC
Masking
NONE
Enrollment
22
Administration of GEH200520 Injection followed by GEH200521 (18F) Injection
Repeat 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
Vanderbilt University Medical Center
Nashville, Tennessee, United States
Incidence of all TEAEs
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.
Time frame: 7 days
Radiation dosimetry and biodistribution of GEH200521 (18F) Injection after the GEH200520 Injection mass doses.
Time frame: 7 days
Optimal imaging window post-GEH200521 (18F) Injection after the GEH200520 Injection mass doses.
Time frame: 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.
Time frame: 7 days
Pharmacokinetic property of the area under the curve (AUC) of total protein following administration of different GEH200520 Injection mass doses with a fixed dose of GEH200521 (18F) Injection.
Time frame: 7 days
Pharmacokinetic property of Cmax of total protein following administration of different GEH200520 Injection mass doses with a fixed dose of GEH200521 (18F) Injection.
Time frame: 7 days
Pharmacokinetic property of clearance (CL) of total protein following administration of different GEH200520 Injection mass doses with a fixed dose of GEH200521 (18F) Injection.
Time frame: 7 days
Pharmacokinetic property volume of distribution (V) of total protein following administration of different GEH200520 Injection mass doses with a fixed dose of GEH200521 (18F) Injection.
Time frame: 7 days
To characterise the pharmacokinetic property of the elimination half-life (t1/2) of total protein following administration of different GEH200520 Injection mass doses with a fixed dose of GEH200521 (18F) Injection.
Time frame: 7 days
Collection of the incidence, severity, changes between visits for AEs/SAEs/AESIs.
Time frame: 7 days
Proportion of subjects with clinically significant abnormalities detected during physical examination status by system organs following administration of GEH200520 and GEH200521 (18F).
Time frame: 7 days
Proportion of subjects with clinically significant abnormalities detected for serum biochemistry test results following administration of GEH200520 and GEH200521 (18F).
Time frame: 7 days
Proportion of subjects with clinically significant abnormalities detected for haematology test results following administration of GEH200520 and GEH200521 (18F).
Time frame: 7 days
Proportion of subjects with clinically significant abnormalities detected for beats per minute following administration of GEH200520 and GEH200521 (18F).
Time frame: 7 days
Changes in systolic and diastolic blood pressure in mmHg following administration of GEH200520 and GEH200521 (18F).
Time frame: 7 days
Changes in temperature as degree F following administration of GEH200520 and GEH200521 (18F).
Time frame: 7 days
Proportion of subjects with clinically significant abnormalities detected during 12-lead electrocardiograms (ECGs) following administration of GEH200520 and GEH200521 (18F).
Time frame: 7 days
Incidence of treatment induced and treatment enhance anti drug antibody responses following administration of GEH200520 and GEH200521 (18F)
Time frame: 7 days
Test-retest imaging reliability of GEH200521 (18F) Injection co-administered with the selected mass dose of GEH200520 Injection, when administered on 2 different days
Time frame: 13 days
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