Chemical and Photonic Interactions in vitro and in vivo between Fluorescent Tracer and Nanoparticle-based Scavenger for enhanced Molecular Imaging

Tina Gulin-Sarfraz, E Pryazhnikov, J Zhang, L Khiroug, Jessica Rosenholm

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)
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We hereby present a concept of scavenging excess imaging agent prior to a diagnostic imaging session, consequently allowing for enhanced contrast of signals originating from the tissue area of interest to the signals originating from systemic imaging agent residues. In our study, a prospective silica core–shell nanoparticle-based scavenger was designed and explored for its feasibility to scavenge a specific imaging agent (tracer) in the bloodstream. The developed tracer–scavenger system was first investigated under in vitro conditions to ensure proper binding between tracer and scavenger is taking place, as confirmed by Förster/fluorescence resonance energy transfer studies. In vivo, two-photon imaging was utilized to directly study the interaction of the scavenger particles and the tracer molecules in the vasculature of mice. To our knowledge, a methodological solution for in vivo differentiation between signals, originating from tissue and blood, has not been presented elsewhere.

Original languageUndefined/Unknown
Pages (from-to)
JournalMaterials Today Bio
Publication statusPublished - 2019
MoE publication typeA1 Journal article-refereed


  • diagnostic use
  • brain imaging
  • Contrast agent
  • Silica
  • Diagnostics
  • diagnostic tools

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