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Nested Nanobubbles for Ultrasound-Triggered Drug Release.
Batchelor, Damien V B; Abou-Saleh, Radwa H; Coletta, P Louise; McLaughlan, James R; Peyman, Sally A; Evans, Stephen D.
Afiliación
  • Batchelor DVB; Department of Physics and Astronomy, University of Leeds, Leeds, U.K.
  • Abou-Saleh RH; Department of Physics and Astronomy, University of Leeds, Leeds, U.K.
  • Coletta PL; Department of Physics, Mansoura University, Mansoura, Egypt.
  • McLaughlan JR; Leeds Institute of Medical Research, Wellcome Trust Brenner Building, St. James's University Hospital, Leeds, U.K.
  • Peyman SA; Leeds Institute of Medical Research, Wellcome Trust Brenner Building, St. James's University Hospital, Leeds, U.K.
  • Evans SD; School of Electronic and Electrical Engineering, University of Leeds, Leeds, U.K.
ACS Appl Mater Interfaces ; 12(26): 29085-29093, 2020 Jul 01.
Article en En | MEDLINE | ID: mdl-32501014
Because of their size (1-10 µm), microbubble-based drug delivery agents suffer from confinement to the vasculature, limiting tumor penetration and potentially reducing the drug efficacy. Nanobubbles (NBs) have emerged as promising candidates for ultrasound-triggered drug delivery because of their small size, allowing drug delivery complexes to take advantage of the enhanced permeability and retention effect. In this study, we describe a simple method for production of nested-nanobubbles (Nested-NBs) by encapsulation of NBs (∼100 nm) within drug-loaded liposomes. This method combines the efficient and well-established drug-loading capabilities of liposomes while utilizing NBs as an acoustic trigger for drug release. Encapsulation was characterized using transmission electron microscopy with an encapsulation efficiency of 22 ± 2%. Nested-NBs demonstrated echogenicity using diagnostic B-mode imaging, and acoustic emissions were monitored during high-intensity focused ultrasound (HIFU) in addition to monitoring of model drug release. Results showed that although the encapsulated NBs were destroyed by pulsed HIFU [peak negative pressure (PNP) 1.54-4.83 MPa], signified by loss of echogenicity and detection of inertial cavitation, no model drug release was observed. Changing modality to continuous wave (CW) HIFU produced release across a range of PNPs (2.01-3.90 MPa), likely because of a synergistic effect of mechanical and increased thermal stimuli. Because of this, we predict that our NBs contain a mixed population of both gaseous and liquid core particles, which upon CW HIFU undergo rapid phase conversion, triggering liposomal drug release. This hypothesis was investigated using previously described models to predict the existence of droplets and their phase change potential and the ability of this phase change to induce liposomal drug release.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Sistemas de Liberación de Medicamentos / Microburbujas / Liposomas Tipo de estudio: Prognostic_studies Límite: Animals / Humans Idioma: En Revista: ACS Appl Mater Interfaces Asunto de la revista: BIOTECNOLOGIA / ENGENHARIA BIOMEDICA Año: 2020 Tipo del documento: Article Pais de publicación: Estados Unidos
Texto completo
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Sistemas de Liberación de Medicamentos / Microburbujas / Liposomas Tipo de estudio: Prognostic_studies Límite: Animals / Humans Idioma: En Revista: ACS Appl Mater Interfaces Asunto de la revista: BIOTECNOLOGIA / ENGENHARIA BIOMEDICA Año: 2020 Tipo del documento: Article Pais de publicación: Estados Unidos