![]() ![]() As part of our ongoing efforts to develop highly specific CXCR4-targeted imaging probes and with the aim to assess the suitability of this ligand for first proof-of-concept studies in humans, we further evaluated the new 68Ga-labeled high-affinity cyclic CXCR4 ligand, 68Ga-CPCR4-2 ( cyclo( D-Tyr 1- D-Orn 2-Arg 3-2-Nal 4-Gly 5)). The overexpression of the chemokine receptor CXCR4 plays an important role in oncology, since together with its endogenous ligand, the stromal cell–derived factor (SDF1-α), CXCR4 is involved in tumor development, growth, and organ-specific metastasis.
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