Ultrasound mediated localized drug delivery

Stuart Ibsen, Michael Benchimol, Dmitri Simberg, Sadik Esener

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


Chemotherapy is one of the frontline treatments for cancer patients, but the toxic side effects limit its effectiveness and potential. The goal of drug delivery is to reduce these side effects by encapsulating the drugs in a carrier which prevents release and can circulate throughout the body causing minimal damage to the healthy tissue. Slow release carriers have been developed which reduce the exposure to healthy tissue but this slow release also limits the maximum levels of drug in the tumor and nonspecific accumulation in healthy tissue remains a major hurdle. The next advance is to design these carriers to produce a rapid burst release of drug, but only in response to a localized trigger. The trigger of choice is low intensity focused ultrasound. A new particle is described here which incorporates an ultrasound sensitive microbubble of perfluorocarbon gas within a protective liposome carrier along with the payload. It is shown that this design can accomplish the desired burst release when exposed to ultrasound focused to small spatial locations within tissue phantoms. The ability to trigger release could provide a second level of spatial and temporal control beyond biochemical targeting or passive accumulation, making these promising particles for further development.

Original languageEnglish (US)
Title of host publicationNano-Biotechnology for Biomedical and Diagnostic Research
PublisherSpringer New York LLC
Number of pages9
ISBN (Print)9789400725546
StatePublished - 2011
Externally publishedYes

Publication series

NameAdvances in Experimental Medicine and Biology
ISSN (Print)00652598


  • Burst release
  • Controlled release
  • Focused ultrasound
  • Microbubbles
  • Triggered drug delivery

ASJC Scopus subject areas

  • General Biochemistry, Genetics and Molecular Biology
  • General Medicine


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