Targeted microbubble-mediated ultrasound therapy: A feasibility study

R. Saini, A. G. Sorace, K. Hoyt

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

In this study, microbubble (MB) mediated ultrasound (US) therapy was used in conjunction with antibody-labeled MBs to determine if localization of MBs would improve drug uptake. The custom experimental US setup involved a single element immersion transducer in series with a signal generator and power amplifier. 2LMP breast cancer cells were infected with a replication incompetent adenovirus vector to induce expression of human somatostatin receptors with an HA tag for targeting. Cells were plated on acoustically transparent plates. Streptavidin coated MBs were labeled with either biotinylated anti-HA antibody or biotinylated anti-mouse IgG antibodies. Cell plates were injected with calcein dye and MBs (anti-HA antibody or IgG isotype control antibody). Cells underwent combination therapy using the following US parameters: transmit frequency of 1.0 MHz, 5.0 min duration, pulse repetition period (PRP) of 0.01 sec, duty cycle of 20% and a mechanical index (MI) of 0.1, 1.0 or 2.0. Fluorescent signals from internalized calcein molecules were quantified for each cell population using flow cytometer. Light microscopy images were acquired and registered to fluorescence images to visibly validate tracer uptake. Comparing anti-HA antibody-labeled MB data to that obtained using control MBs, MB-mediated US therapy at an MI of 0.1 produced a significant increase in internalized tracer concentrations (p < 0.001). At an MI of 1.0 or 2.0, increases in the amount of internalized fluorescent tracers were also observed when comparing targeted and control MB group data (p > 0.44 and p < 0.001, respectively) but considerable lower than that found MB-mediated US therapy at an MI of 0.1. These results suggest targeted MB-mediated US exposure using low MI exposure is effective at modulating cell permeability and improving drug uptake.

Original languageEnglish (US)
Title of host publication2011 IEEE International Ultrasonics Symposium, IUS 2011
Pages1622-1625
Number of pages4
DOIs
StatePublished - Dec 1 2011
Event2011 IEEE International Ultrasonics Symposium, IUS 2011 - Orlando, FL, United States
Duration: Oct 18 2011Oct 21 2011

Other

Other2011 IEEE International Ultrasonics Symposium, IUS 2011
CountryUnited States
CityOrlando, FL
Period10/18/1110/21/11

Fingerprint

antibodies
therapy
cells
tracers
drugs
adenoviruses
signal generators
power amplifiers
breast
submerging
mice
repetition
permeability
transducers
pulse duration
amplifiers
dyes
cancer
microscopy
fluorescence

ASJC Scopus subject areas

  • Acoustics and Ultrasonics

Cite this

Saini, R., Sorace, A. G., & Hoyt, K. (2011). Targeted microbubble-mediated ultrasound therapy: A feasibility study. In 2011 IEEE International Ultrasonics Symposium, IUS 2011 (pp. 1622-1625). [6293568] https://doi.org/10.1109/ULTSYM.2011.0403

Targeted microbubble-mediated ultrasound therapy : A feasibility study. / Saini, R.; Sorace, A. G.; Hoyt, K.

2011 IEEE International Ultrasonics Symposium, IUS 2011. 2011. p. 1622-1625 6293568.

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Saini, R, Sorace, AG & Hoyt, K 2011, Targeted microbubble-mediated ultrasound therapy: A feasibility study. in 2011 IEEE International Ultrasonics Symposium, IUS 2011., 6293568, pp. 1622-1625, 2011 IEEE International Ultrasonics Symposium, IUS 2011, Orlando, FL, United States, 10/18/11. https://doi.org/10.1109/ULTSYM.2011.0403
Saini R, Sorace AG, Hoyt K. Targeted microbubble-mediated ultrasound therapy: A feasibility study. In 2011 IEEE International Ultrasonics Symposium, IUS 2011. 2011. p. 1622-1625. 6293568 https://doi.org/10.1109/ULTSYM.2011.0403
Saini, R. ; Sorace, A. G. ; Hoyt, K. / Targeted microbubble-mediated ultrasound therapy : A feasibility study. 2011 IEEE International Ultrasonics Symposium, IUS 2011. 2011. pp. 1622-1625
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