Microbubble therapy enhances anti-tumor properties of cisplatin and cetuximab in vitro and in vivo

Cara H. Heath, Anna Sorace, Joseph Knowles, Eben Rosenthal, Kenneth Hoyt

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

Objective. To determine if microbubble-mediated ultrasound therapy (MB-UST) can improve cisplatin or cetuximab cytotoxicity of head and neck squamous cell carcinoma (HNSCC) in vitro and in vivo by increasing tumor-specific drug delivery by disruption of tumor cell membranes and enhancing vascular permeability.Study Design. In vitro and in vivo study.Setting. University medical center.Subjects. Immunodeficient mice (6 weeks old) and 4 HNSCC cell lines.Methods. Changes to cell permeability were assessed in vitro after MB-UST. Cellular apoptosis resulting from adjuvant MB-UST with subtherapeutic doses of cisplatin or cetuximab was assessed by cell survival assays in vitro. The in vivo effect of adjuvant MB-UST in flank tumors was assessed in vivo with histological analysis and diffusion-weighted magnetic resonance imaging (DW-MRI).Results. In vitro results revealed that MB-UST can increase cell permeability and enhance drug uptake and apoptosis in 4 HNSCC cell lines. In vivo adjuvant MB-UST with cetuximab or cisplatin showed a statistically significant reduction in tumor size when compared with untreated controls. TUNEL analysis yielded a larger number of cells undergoing apoptosis in tumors treated with cetuximab and adjuvant MB-UST than did cetuximab alone but was not significantly greater in tumors treated with cisplatin and adjuvant MB-UST compared with cisplatin alone. DW-MRI analysis showed more free water, which corresponds to increased cell membrane disruption, in tumors treated with MB-UST.Conclusion. MB-UST promotes disruption of cell membranes in tumor cells in vitro, which may be leveraged to selectively improve the uptake of conventional and targeted therapeutics in vivo.

Original languageEnglish (US)
Pages (from-to)938-945
Number of pages8
JournalOtolaryngology - Head and Neck Surgery (United States)
Volume146
Issue number6
DOIs
StatePublished - Jun 1 2012

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Microbubbles
Cisplatin
Neoplasms
Therapeutics
Diffusion Magnetic Resonance Imaging
Cell Membrane
Apoptosis
Permeability
In Vitro Techniques
Cetuximab
Cell Line
In Situ Nick-End Labeling
Capillary Permeability
Pharmaceutical Preparations
Cell Survival
Cell Count

Keywords

  • cetuximab
  • cisplatin
  • head and neck squamous cell carcinoma
  • microbubbles
  • ultrasound

ASJC Scopus subject areas

  • Otorhinolaryngology
  • Surgery

Cite this

Microbubble therapy enhances anti-tumor properties of cisplatin and cetuximab in vitro and in vivo. / Heath, Cara H.; Sorace, Anna; Knowles, Joseph; Rosenthal, Eben; Hoyt, Kenneth.

In: Otolaryngology - Head and Neck Surgery (United States), Vol. 146, No. 6, 01.06.2012, p. 938-945.

Research output: Contribution to journalArticle

Heath, Cara H. ; Sorace, Anna ; Knowles, Joseph ; Rosenthal, Eben ; Hoyt, Kenneth. / Microbubble therapy enhances anti-tumor properties of cisplatin and cetuximab in vitro and in vivo. In: Otolaryngology - Head and Neck Surgery (United States). 2012 ; Vol. 146, No. 6. pp. 938-945.
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