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CD38‐Specific Gallium‐68 Labeled Peptide Radiotracer Enables Pharmacodynamic Monitoring in Multiple Myeloma with PET
- Source :
- Advanced Science, Vol 11, Iss 16, Pp n/a-n/a (2024)
- Publication Year :
- 2024
- Publisher :
- Wiley, 2024.
-
Abstract
- Abstract The limited availability of molecularly targeted low‐molecular‐weight imaging agents for monitoring multiple myeloma (MM)‐targeted therapies has been a significant challenge in the field. In response, a first‐in‐class peptide‐based radiotracer, [68Ga]Ga‐AJ206, is developed that can be seamlessly integrated into the standard clinical workflow and is specifically designed to noninvasively quantify CD38 levels and pharmacodynamics by positron emission tomography (PET). A bicyclic peptide, AJ206, is synthesized and exhibits high affinity to CD38 (KD: 19.1 ± 0.99 × 10−9 m) by surface plasmon resonance. Further, [68Ga]Ga‐AJ206‐PET shows high contrast within 60 min and suitable absorbed dose estimates for clinical use. Additionally, [68Ga]Ga‐AJ206 detects CD38 expression in cell line‐derived xenografts, patient‐derived xenografts (PDXs), and disseminated disease models in a manner consistent with flow cytometry and immunohistochemistry findings. Moreover, [68Ga]Ga‐AJ206‐PET successfully quantifies CD38 pharmacodynamics in PDXs, revealing increased CD38 expression in the tumor following all‐trans retinoic acid (ATRA) therapy. In conclusion, [68Ga]Ga‐AJ206 exhibits the salient features required for clinical translation, providing CD38‐specific high‐contrast images in multiple models of MM. [68Ga]Ga‐AJ206‐PET could be useful for quantifying total CD38 levels and pharmacodynamics during therapy to evaluate approved and new therapies in MM and other diseases with CD38 involvement.
- Subjects :
- ATRA
CD38
daratumumab
isatuximab
PET
pharmacodynamics
Science
Subjects
Details
- Language :
- English
- ISSN :
- 21983844
- Volume :
- 11
- Issue :
- 16
- Database :
- Directory of Open Access Journals
- Journal :
- Advanced Science
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.483539edeaa46b3bf2f46cd6037d770
- Document Type :
- article
- Full Text :
- https://doi.org/10.1002/advs.202308617