Article

Steps toward mapping the human vasculature by phage display.

Department of Genito-Urinary Medical Oncology, The University of Texas M.D. Anderson Cancer Center, Houston, Texas, USA.
Nature Medicine (Impact Factor: 28.05). 03/2002; 8(2):121-7. DOI: 10.1038/nm0202-121
Source: PubMed

ABSTRACT The molecular diversity of receptors in human blood vessels remains largely unexplored. We developed a selection method in which peptides that home to specific vascular beds are identified after administration of a peptide library. Here we report the first in vivo screening of a peptide library in a patient. We surveyed 47,160 motifs that localized to different organs. This large-scale screening indicates that the tissue distribution of circulating peptides is nonrandom. High-throughput analysis of the motifs revealed similarities to ligands for differentially expressed cell-surface proteins, and a candidate ligand-receptor pair was validated. These data represent a step toward the construction of a molecular map of human vasculature and may have broad implications for the development of targeted therapies.

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