The effect of shear flow on nanoparticle agglomeration and deposition in in vitro dynamic flow models

Christin Grabinski, Monita Sharma, Elizabeth Maurer, Courtney Sulentic, R. Mohan Sankaran, Saber Hussain

Research output: Contribution to journalArticlepeer-review

Abstract

Traditional in vitro toxicity experiments typically involve exposure of a mono- or co-culture of cells to nanoparticles (NPs) in static conditions with the assumption of 100% deposition (i.e. dose) of well-dispersed particles. However, cellular dose can be affected by agglomeration and the unique transport kinetics of NPs in biological media. We hypothesize that shear flow can address these issues and achieve more predictable dosage. Here, we compare the behavior of gold NPs with diameters of 5, 10 and 30 nm in static and dynamic in vitro models. We also utilize transport modeling to approximate the shear rate experienced by the cells in dynamic conditions to evaluate physiological relevance. The transport kinetics show that NP behavior is governed by both gravity and diffusion forces in static conditions and only diffusion in dynamic conditions. Our results reveal that dynamic systems are capable of producing a more predictable dose compared to static systems, which has strong implications for improving repeatability in nanotoxicity assessments.

Original languageEnglish (US)
Pages (from-to)74-83
Number of pages10
JournalNanotoxicology
Volume10
Issue number1
DOIs
StatePublished - Jan 2 2016
Externally publishedYes

Keywords

  • Agglomerate density
  • dosimetry
  • exposure methods
  • nanoparticle transport

ASJC Scopus subject areas

  • Biomedical Engineering
  • Toxicology

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