Nanoparticles that display short collagen-related peptides. Potent stimulation of human platelet aggregation by triple helical motifs - PubMed (original) (raw)
. 2007 Jul-Aug;18(4):1025-7.
doi: 10.1021/bc070105s. Epub 2007 Jun 21.
Affiliations
- PMID: 17583929
- DOI: 10.1021/bc070105s
Nanoparticles that display short collagen-related peptides. Potent stimulation of human platelet aggregation by triple helical motifs
Mabel A Cejas et al. Bioconjug Chem. 2007 Jul-Aug.
Abstract
Collagen plays a key role in the activation and adhesion of blood platelets via their cell-surface receptors. Normally, collagen-related peptides (CRPs), even one as long as a 30-mer (10 Gly-Pro-Hyp (GPO) repeats), are unable to effectively express collagen's platelet-activating behavior. We attached two short CRPs, AcHN-(Gly-Pro-Hyp)nGly-OH with n = 5 (1) and n = 10 (2), via the C-terminus to amino-functionalized latex nanoparticles to create a multimeric display of triple helical motifs. These nanomaterials were characterized by dynamic light scattering and environmental scanning electron microscopy. The nanoparticles bearing the 31-mer CRP sequence, 2, but not the 16-mer sequence, 1, effectively induced the aggregation of human platelets, with a potency level approaching that of native type I collagen. Our results highlight the importance of presenting triple helical CRP motifs of sufficient length on a suitable scaffold in order to stimulate platelets.
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