64Cu-AMD3100--a novel imaging agent for targeting chemokine receptor CXCR4.
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Jacobson O, Weiss ID, Szajek L, Farber JM, Kiesewetter DO
64Cu-AMD3100--a novel imaging agent for targeting chemokine receptor CXCR4.
Bioorg Med Chem. 2009 Feb 15;17(4):1486-93. doi: 10.1016/j.bmc.2009.01.014. Epub 2009 Jan 15.
- PubMed ID
- 19188071 [ View in PubMed]
- Abstract
CXCR4 is a chemokine receptor which has been shown to be exploited by various tumors for increased survival, invasion, and homing to target organs. We developed a one step radiosynthesis for labeling the CXCR4-specific antagonist AMD3100 with Cu-64 to produce (64)Cu-AMD3100 with a specific activity of 11.28Ci/ micromol (417GBq/ micromol) at the end of radiosynthesis. Incorporation of Cu(II) ion into AMD3100 did not change its ability to inhibit cellular migration in response to the (only) CXCR4 ligand, SDF-1/CXCL12. (64)Cu-AMD3100 binding affinity to CXCR4 was found to be 62.7 microM. Biodistribution of (64)Cu-AMD3100 showed accumulation in CXCR4-expressing organs and tissues, a renal clearance pathway, and an anomalous specific accumulation in the liver. We conclude that (64)Cu-AMD3100 exhibits promise as a potential PET imaging agent for visualization of CXCR4-positive tumors and metastases and might be used to guide and monitor anti-CXCR4 tumor therapy.
DrugBank Data that Cites this Article
- Binding Properties
Drug Target Property Measurement pH Temperature (°C) Plerixafor C-X-C chemokine receptor type 4 IC 50 (nM) 27.4 N/A N/A Details Plerixafor C-X-C chemokine receptor type 4 IC 50 (nM) 15200 N/A N/A Details