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Vascular cell adhesion molecule 1 (VCAM-1) plays a major role in the chronic inflammatory processes involved in vulnerable atherosclerotic plaque development. We previously showed that the (99m)Tc-labeled major histocompatibility complex 1-derived peptide B2702p bound specifically to VCAM-1 and allowed the ex vivo imaging of atherosclerotic lesions in Watanabe heritable hyperlipidemic rabbits. However, B2702p target-to-background ratio was suboptimal for the in vivo imaging of VCAM-1 expression in atherosclerotic lesions. To improve the target-to-background ratio, 20 derivatives of B2702p (B2702p1-B2702p20) were synthesized using the alanine scan methodology. We hypothesized that (99m)Tc-radiolabeled B2702p derivatives might allow the molecular imaging of VCAM-1 expression in an experimental model of atherosclerosis.

In Vivo Molecular Imaging of Atherosclerotic Lesions in ApoE−/− Mice Using VCAM-1–Specific, 99mTc-Labeled Peptidic Sequences

In Vivo Molecular Imaging of Atherosclerotic Lesions in ApoE^−/− Mice Using VCAM-1–Specific, ^99mTc-Labeled Peptidic Sequences