An evaluation of the sonoporation potential of low-boiling point phase-change ultrasound contrast agents in vitro

Samantha M. Fix, Anthony Novell, Yeoheung Yun, Paul A. Dayton, Christopher B. Arena

Research output: Contribution to journalArticle

  • 6 Citations

Abstract

Background: Phase-change ultrasound contrast agents (PCCAs) offer a solution to the inherent limitations associated with using microbubbles for sonoporation; they are characterized by prolonged circulation lifetimes, and their nanometer-scale sizes may allow for passive accumulation in solid tumors. As a first step towards the goal of extravascular cell permeabilization, we aim to characterize the sonoporation potential of a low-boiling point formulation of PCCAs in vitro. Methods: Parameters to induce acoustic droplet vaporization and subsequent microbubble cavitation were optimized in vitro using high-speed optical microscopy. Sonoporation of pancreatic cancer cells in suspension was then characterized at a range of pressures (125-600kPa) and pulse lengths (5-50cycles) using propidium iodide as an indicator molecule. Results: We achieved sonoporation efficiencies ranging from 8±1% to 36±4% (percent of viable cells), as evidenced by flow cytometry. Increasing sonoporation efficiency trended with increasing pulse length and peak negative pressure. Conclusions: We conclude that PCCAs can be used to induce the sonoporation of cells in vitro, and our results warrant further investigation into the use of PCCAs as extravascular sonoporation agents in vivo.

LanguageEnglish (US)
Article number7
JournalJournal of Therapeutic Ultrasound
Volume5
Issue number1
DOIs
StatePublished - Jan 24 2017

Fingerprint

Contrast Media
Microbubbles
Pressure
Volatilization
Propidium
Pancreatic Neoplasms
Acoustics
Microscopy
Suspensions
Flow Cytometry
In Vitro Techniques
Neoplasms

Keywords

  • Acoustic droplet vaporization
  • Drug delivery
  • Nanodroplet
  • Sonoporation
  • Ultrasound

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

Cite this

An evaluation of the sonoporation potential of low-boiling point phase-change ultrasound contrast agents in vitro. / Fix, Samantha M.; Novell, Anthony; Yun, Yeoheung; Dayton, Paul A.; Arena, Christopher B.

In: Journal of Therapeutic Ultrasound, Vol. 5, No. 1, 7, 24.01.2017.

Research output: Contribution to journalArticle

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