Biodistribution, Dosimetry, and Safety of 68Ga-EV203 in Hematological Malignancies
23 juin 2026 mis à jour par: He-Qing Yi, Zhejiang Cancer Hospital
A Clinical Translational Study Evaluating the Biodistribution, Radiation Dosimetry, and Safety of 68Ga-EV203 Injection in Patients With Hematological Malignancies
The goal of this clinical trial is to evaluate the biodistribution, radiation dosimetry, safety, and time-dependent image quality of ^68^Ga-EV203 injection in patients with hematological malignancies (multiple myeloma, non-Hodgkin lymphoma, or acute myeloid leukaemia), aged 18-75 years, who are able to lie still for 0.5 h and have no contraindications (e.g., pregnancy, recent radiotherapy, etc.).
The main questions it aims to answer are:
What are the biodistribution (organ uptake, %ID, SUV) and radiation absorbed doses (mGy/MBq) of ^68^Ga-EV203 in target organs and the whole body?
What is the safety profile of ^68^Ga-EV203, as measured by adverse events and serious adverse events?
How does the PET/CT image quality differ between the 30-, 60-, 90-, and 120-minute time points after injection?
If there is a comparison group: Researchers will compare the positive percent agreement (PPA) and positive predictive value agreement (PPrA) of ^68^Ga-EV203 PET/CT against ^18^F-FDG PET/CT to see if the new tracer offers comparable or superior diagnostic performance in detecting CXCR4-positive lesions.
Participants will:
Receive a single intravenous injection of 74-296 MBq of ^68^Ga-EV203.
Undergo whole-body PET/CT scans at 30 min, 60 min, 90 min, and 120 min post-injection on the same day.
Return within 3-7 days (but at least 2 days later) for a standard ^18^F-FDG PET/CT scan after fasting for ≥5 h.
Attend a safety follow-up visit at day 8-14 for physical examination, vital signs, and laboratory tests (blood count, coagulation, and biochemistry).
Aperçu de l'étude
Statut
Recrutement
Les conditions
Intervention / Traitement
Type d'étude
Interventionnel
Inscription (Estimé)
30
Phase
- N'est pas applicable
Contacts et emplacements
Cette section fournit les coordonnées de ceux qui mènent l'étude et des informations sur le lieu où cette étude est menée.
Coordonnées de l'étude
- Nom: Heqing Yi
- Numéro de téléphone: 0571-88122020
- E-mail: yihq@zjcc.org.cn
Lieux d'étude
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Zhejiang
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Hangzhou, Zhejiang, Chine, 310022
- Recrutement
- Zhejiang Cancer Hospital
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Contact:
- Heqing Yi
- Numéro de téléphone: 0571-88122020
- E-mail: yihq@zjcc.org.cn
-
-
Critères de participation
Les chercheurs recherchent des personnes qui correspondent à une certaine description, appelée critères d'éligibilité. Certains exemples de ces critères sont l'état de santé général d'une personne ou des traitements antérieurs.
Critère d'éligibilité
Âges éligibles pour étudier
- Adulte
- Adulte plus âgé
Accepte les volontaires sains
Non
La description
Inclusion Criteria:
- Age 18 to 75 years (inclusive) at screening.
- Able to lie still on the scanning bed for 0.5 hours.
- Willing to sign informed consent and able to comply with protocol requirements.
- Histologically/cytologically confirmed diagnosis of multiple myeloma (MM), non-Hodgkin lymphoma (NHL), or acute myeloid leukaemia (AML) according to the 2022 WHO Classification of Haematolymphoid Tumours.
Exclusion Criteria:
- Has claustrophobia or any other condition that prevents tolerance of imaging procedures
- Has undergone major surgery within 3 months prior to screening, or plans to undergo surgery during the study period.
- Has received any other radiopharmaceutical imaging agent or therapeutic radiopharmaceutical within 30 days prior to screening.
- Is pregnant or lactating at screening.
- Is a woman of childbearing potential or a man who does not agree to use effective contraception during the study (from signing informed consent) and for 3 months after study drug administration.
- Has a known allergy to alcohol or any component of the investigational product, or has other allergies judged by the investigator to increase the participant's risk.
- Has clinically significant cardiovascular disease within 6 months prior to screening (e.g., myocardial infarction, unstable angina, symptomatic congestive heart failure, uncontrolled severe arrhythmia).
- Has uncontrolled hypertension, or a history of coagulopathy or coagulation disorders.
- Has been diagnosed with another malignancy (other than the target haematological disease) within 5 years prior to 68Ga-EV203 administration.
- Has received any systemic anti-cancer therapy within 2 weeks prior to planned 68Ga-EV203 administration, or radiotherapy within 8 weeks prior to planned administration.
- Has any other condition that, in the investigator's judgment, makes the participant unsuitable for participation in the study.
Plan d'étude
Cette section fournit des détails sur le plan d'étude, y compris la façon dont l'étude est conçue et ce que l'étude mesure.
Comment l'étude est-elle conçue ?
Détails de conception
- Objectif principal: Diagnostique
- Répartition: N / A
- Modèle interventionnel: Affectation à un seul groupe
- Masquage: Aucun (étiquette ouverte)
Armes et Interventions
Groupe de participants / Bras |
Intervention / Traitement |
|---|---|
|
Expérimental: 68Ga-EV203 PET/CT Biodistribution, Dosimetry, and Safety Evaluation in Hematological Malignancies
|
This arm is distinguished by: (1) a novel CXCR4-targeting cyclic peptide, 68Ga-EV203, with >10-fold higher binding affinity than the benchmark 68Ga-Pentixafor, enabling superior tumor-to-background contrast.
(2) Four sequential whole-body PET/CT scans at 30, 60, 90, and 120 min post-injection to construct time-activity curves and compute organ-specific absorbed doses (mGy/MBq) and effective dose (mSv/MBq) using OLINDA/EXM-a formal dosimetry endpoint absent in routine diagnostic imaging.
(3) Mandatory paired 18F-FDG PET/CT within 3-7 days for direct intrapatient head-to-head diagnostic comparison .
(4) Strict enrollment limited to three defined hematological subtypes (MM, NHL, AML) per WHO 2022, with explicit washout periods (≥2 weeks from last anticancer therapy, ≥8 weeks from radiotherapy).
(5) A 14-day safety follow-up including laboratory tests (CBC, coagulation, biochemistry) and rigorous contraception requirements for 3 months post-dose.
|
Que mesure l'étude ?
Principaux critères de jugement
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
|
Percentage of Injected Dose (%ID) and Standardized Uptake Values (SUVmean and SUVmax) in Target Organs Measured by PET/CT Imaging
Délai: Day 1 - PET/CT scans are acquired at 30 minutes (±5 minutes), 60 minutes (±10 minutes), 90 minutes (±10 minutes), and 120 minutes (±15 minutes) after intravenous injection of 68Ga-EV203.
|
Radioactivity concentration in major organs (including brain, lungs, heart, liver, spleen, kidneys, bladder, bone, and gastrointestinal tract) is quantified as percentage of injected dose (%ID) and mean/maximum standardized uptake values (SUVmean/SUVmax) using three-dimensional volumes of interest (VOIs).
Data will be summarized using descriptive statistics (mean, standard deviation, median, minimum, and maximum) across all participants.
|
Day 1 - PET/CT scans are acquired at 30 minutes (±5 minutes), 60 minutes (±10 minutes), 90 minutes (±10 minutes), and 120 minutes (±15 minutes) after intravenous injection of 68Ga-EV203.
|
|
Organ-Specific Radiation Absorbed Doses (mGy/MBq) and Whole-Body Effective Dose (mSv/MBq) Calculated via OLINDA/EXM Software
Délai: Day 1 - PET/CT scans are acquired at 30 minutes (±5 minutes), 60 minutes (±10 minutes), 90 minutes (±10 minutes), and 120 minutes (±15 minutes) after intravenous injection of 68Ga-EV203.
|
Time-activity curves (fitted with single- or bi-exponential models) are integrated to obtain cumulated activity for each organ.
Absorbed doses (mGy/MBq) and whole-body effective dose (mSv/MBq) are computed using validated dosimetry software (OLINDA/EXM or MIRDcalc) with ICRP reference phantoms.
Results will be reported as mean, standard deviation, and range across participants.
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Day 1 - PET/CT scans are acquired at 30 minutes (±5 minutes), 60 minutes (±10 minutes), 90 minutes (±10 minutes), and 120 minutes (±15 minutes) after intravenous injection of 68Ga-EV203.
|
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Number of Participants with Treatment-Emergent Adverse Events (AEs) and Serious Adverse Events (SAEs) Graded by NCI-CTCAE Version 5.0
Délai: Adverse event monitoring begins from the time of injection on Day 1 and continues through the safety follow-up visit, which occurs between Day 8 and Day 14 post-injection.
|
All adverse events and serious adverse events occurring from study drug administration through the final safety visit are recorded and graded for severity according to the National Cancer Institute Common Terminology Criteria for Adverse Events (NCI-CTCAE) version 5.0.
Data will be summarized as frequencies and percentages of participants experiencing each type and grade of event.
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Adverse event monitoring begins from the time of injection on Day 1 and continues through the safety follow-up visit, which occurs between Day 8 and Day 14 post-injection.
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Mesures de résultats secondaires
Mesure des résultats |
Description de la mesure |
Délai |
|---|---|---|
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Tumor-to-Background Ratios (TBR) Derived from PET/CT Images at Four Consecutive Post-Injection Time Points
Délai: Day 1 - PET/CT scans are acquired at 30 minutes (±5 minutes), 60 minutes (±10 minutes), 90 minutes (±10 minutes), and 120 minutes (±15 minutes) after intravenous injection of 68Ga-EV203.
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Tumor-to-background ratios (lesion SUVmax divided by liver SUVmean and by blood-pool SUVmean) are calculated at 30, 60, 90, and 120 minutes after injection to evaluate time-dependent image quality.
Differences across time points will be summarized using paired descriptive statistics (means and standard deviations).
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Day 1 - PET/CT scans are acquired at 30 minutes (±5 minutes), 60 minutes (±10 minutes), 90 minutes (±10 minutes), and 120 minutes (±15 minutes) after intravenous injection of 68Ga-EV203.
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Collaborateurs et enquêteurs
C'est ici que vous trouverez les personnes et les organisations impliquées dans cette étude.
Parrainer
Dates d'enregistrement des études
Ces dates suivent la progression des dossiers d'étude et des soumissions de résultats sommaires à ClinicalTrials.gov. Les dossiers d'étude et les résultats rapportés sont examinés par la Bibliothèque nationale de médecine (NLM) pour s'assurer qu'ils répondent à des normes de contrôle de qualité spécifiques avant d'être publiés sur le site Web public.
Dates principales de l'étude
Début de l'étude (Réel)
1 juin 2026
Achèvement primaire (Estimé)
1 juin 2029
Achèvement de l'étude (Estimé)
1 juin 2029
Dates d'inscription aux études
Première soumission
18 juin 2026
Première soumission répondant aux critères de contrôle qualité
23 juin 2026
Première publication (Réel)
26 juin 2026
Mises à jour des dossiers d'étude
Dernière mise à jour publiée (Réel)
26 juin 2026
Dernière mise à jour soumise répondant aux critères de contrôle qualité
23 juin 2026
Dernière vérification
1 juin 2026
Plus d'information
Termes liés à cette étude
Autres numéros d'identification d'étude
- IRB-2026-483
Informations sur les médicaments et les dispositifs, documents d'étude
Étudie un produit pharmaceutique réglementé par la FDA américaine
Non
Étudie un produit d'appareil réglementé par la FDA américaine
Non
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