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In Vivo Phage Display Selection Yields Atherosclerotic Plaque Targeted Peptides for Imaging

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Abstract

Purpose

Atherosclerosis is a leading cause of morbidity and mortality in the Western world, yet specific imaging agents to detect and map inflammatory plaques are still lacking.

Procedures

We used in vivo phage display to interrogate early atherosclerotic lesions present in ApoE−/− mice with the goal of identifying plaque-associated endothelial cell internalized affinity ligands.

Results

We identified 30 phage families with some of these families exhibiting homology to known atherosclerotic proteins, namely, leukemia inhibitory factor, transferrin, and VLA-4. VLA-4 homologous peptides [termed vascular cellular adhesion molecule-1 (VCAM-1) internalizing peptide-28 (VINP28)] bound to and were internalized by VCAM-1-expressing cells and were inhibited by soluble VCAM-1. In addition, a VINP28 modified multimodal nanoparticle showed high affinity for endothelial cells expressing VCAM-1 but low affinity for macrophages or smooth muscle cells.

Conclusion

The identified peptides represent a set of probes to interrogate the cell surface repertoire and potentially allow early detection of atherosclerosis.

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Acknowledgments

The authors would like to thank Dr. Lee Josephson, PhD, for critical review and helpful discussions and Dr. Nikolai Sergeyev, PhD, for synthesis of CLIO-Cy5.5. This study was supported by a grant from the Donald W. Reynolds Foundation Cardiovascular Research Program.

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Authors and Affiliations

  1. Center for Molecular Imaging Research, Massachusetts General Hospital, Harvard Medical School, 149, 13th Street, Rm 5404, Charlestown, MA, 02129, USA

    Kimberly A. Kelly, Matthias Nahrendorf, Amy M. Yu, Fred Reynolds & Ralph Weissleder

Authors
  1. Kimberly A. Kelly
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  2. Matthias Nahrendorf
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  3. Amy M. Yu
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  4. Fred Reynolds
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  5. Ralph Weissleder
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Corresponding author

Correspondence to Ralph Weissleder.

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Kelly, K.A., Nahrendorf, M., Yu, A.M. et al. In Vivo Phage Display Selection Yields Atherosclerotic Plaque Targeted Peptides for Imaging. Mol Imaging Biol 8, 201–207 (2006). https://doi.org/10.1007/s11307-006-0043-6

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  • DOI: https://doi.org/10.1007/s11307-006-0043-6

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