Magnetic Microbubble Mediated Chemo-Sonodynamic Therapy using a Combined Magnetic-Acoustic Device

Estelle Beguin, Michael D Gray, Keiran Logan, Heather Nesbitt, Yingjie Sheng, Sukanta Kamila, Lester C Barnsley, Luca Bau, Anthony P. McHale, J Callan, Eleanor Stride

Research output: Contribution to journalArticle

Abstract

Recent pre-clinical studies have demonstrated the potential of combining chemotherapy and sonodynamic therapy for the treatment of pancreatic cancer. Oxygen-loaded magnetic microbubbles have been explored as a targeted delivery vehicle for this application. Despite preliminary positive results, a previous study identified a significant practical challenge regarding the co-alignment of the magnetic and ultrasound fields. The aim of this study was to determine whether this challenge could be addressed through the use of a magnetic-acoustic device (MAD) combining a magnetic array and ultrasound transducer in a single unit, to simultaneously concentrate and activate the microbubbles at the target site. in vitro experiments were performed in tissue phantoms and followed by in vivo treatment of xenograft pancreatic cancer (BxPC-3) tumours in a murine model. In vitro, a 1.4-fold (p < .01) increase in the deposition of a model therapeutic payload within the phantom was achieved using the MAD compared to separate magnetic and ultrasound devices. In vivo, tumours treated with the MAD had a 9% smaller mean volume 8 days after treatment, while tumours treated with separate devices or microbubbles alone were respectively 45% and 112% larger. This substantial and sustained decrease in tumour volume suggests that the proposed drug delivery approach has the potential to be an effective neoadjuvant therapy for pancreatic cancer patients.

LanguageEnglish
Pages23-33
Number of pages11
JournalJournal of Controlled Release
Volume317
Early online date13 Nov 2019
DOIs
Publication statusPublished - 10 Jan 2020

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Microbubbles
Acoustics
Equipment and Supplies
Pancreatic Neoplasms
Therapeutics
Neoplasms
Neoadjuvant Therapy
Magnetic Fields
Tumor Burden
Transducers
Heterografts
Oxygen
Drug Therapy
Pharmaceutical Preparations

Keywords

  • Drug delivery
  • Magnetic targeting
  • Medical devices
  • Microbubbles
  • Sonodynamic therapy
  • Ultrasound

Cite this

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abstract = "Recent pre-clinical studies have demonstrated the potential of combining chemotherapy and sonodynamic therapy for the treatment of pancreatic cancer. Oxygen-loaded magnetic microbubbles have been explored as a targeted delivery vehicle for this application. Despite preliminary positive results, a previous study identified a significant practical challenge regarding the co-alignment of the magnetic and ultrasound fields. The aim of this study was to determine whether this challenge could be addressed through the use of a magnetic-acoustic device (MAD) combining a magnetic array and ultrasound transducer in a single unit, to simultaneously concentrate and activate the microbubbles at the target site. in vitro experiments were performed in tissue phantoms and followed by in vivo treatment of xenograft pancreatic cancer (BxPC-3) tumours in a murine model. In vitro, a 1.4-fold (p < .01) increase in the deposition of a model therapeutic payload within the phantom was achieved using the MAD compared to separate magnetic and ultrasound devices. In vivo, tumours treated with the MAD had a 9{\%} smaller mean volume 8 days after treatment, while tumours treated with separate devices or microbubbles alone were respectively 45{\%} and 112{\%} larger. This substantial and sustained decrease in tumour volume suggests that the proposed drug delivery approach has the potential to be an effective neoadjuvant therapy for pancreatic cancer patients.",
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Magnetic Microbubble Mediated Chemo-Sonodynamic Therapy using a Combined Magnetic-Acoustic Device. / Beguin, Estelle; Gray, Michael D; Logan, Keiran; Nesbitt, Heather; Sheng, Yingjie; Kamila, Sukanta; Barnsley, Lester C; Bau, Luca; McHale, Anthony P.; Callan, J; Stride, Eleanor.

In: Journal of Controlled Release, Vol. 317, 10.01.2020, p. 23-33.

Research output: Contribution to journalArticle

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T1 - Magnetic Microbubble Mediated Chemo-Sonodynamic Therapy using a Combined Magnetic-Acoustic Device

AU - Beguin, Estelle

AU - Gray, Michael D

AU - Logan, Keiran

AU - Nesbitt, Heather

AU - Sheng, Yingjie

AU - Kamila, Sukanta

AU - Barnsley, Lester C

AU - Bau, Luca

AU - McHale, Anthony P.

AU - Callan, J

AU - Stride, Eleanor

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