title: Ultrasound-mediated targeted drug delivery with a novel cyclodextrin-based drug carrier by mechanical and thermal mechanisms.
abstract: Various mechanisms for ultrasound-mediated targeted drug delivery have been investigated in the past several decades. Cyclodextrins are already known for their ability to encapsulate various drugs in their lipophilic cavity; this paper reports evaluation of the potential of a cyclodextrin-based nanocarrier as a drug delivery vehicle, using cell monolayers in vitro in conjunction with ultrasound as the release mechanism. The application of ultrasound to the cell monolayers results in both thermal and mechanical effects; a current challenge is to differentiate between these effects. In this study, the cell uptake routes of doxorubicin encapsulated in the cyclodextrin-based carrier were investigated, examining individually the thermal and the mechanical effects of focused ultrasound for drug release. Exploiting mechanical effects, the uptake of encapsulated doxorubicin into cancer cells was increased by a factor of up to 5.5 when ultrasound was applied. Thermal application of FUS increased the cellular uptake of encapsulated doxorubicin by a factor of up to 9.6. Hyperthermia without focused ultrasound resulted in an increase by a factor of up to 5.7.
authors.affiliation: CapsuTech Ltd, Nazareth Industrial Area, P.O. Box 2252, Nazareth 16000, Israel. D.gourevich@dundee.ac.uk
authors.forename: Dana
authors.initials: D
authors.lastname: Gourevich
authors.forename: Osnat
authors.initials: O
authors.lastname: Dogadkin
authors.forename: Alexander
authors.initials: A
authors.lastname: Volovick
authors.forename: Lijun
authors.initials: L
authors.lastname: Wang
authors.forename: Jallal
authors.initials: J
authors.lastname: Gnaim
authors.forename: Sandy
authors.initials: S
authors.lastname: Cochran
authors.forename: Andreas
authors.initials: A
authors.lastname: Melzer
mesh_terms: D000903:Antibiotics, Antineoplastic / Q000008:administration & dosage* / Q000737:chemistry; D045744:Cell Line, Tumor; D002470:Cell Survival / Q000187:drug effects; D004317:Doxorubicin / Q000008:administration & dosage* / Q000737:chemistry; D016503:Drug Delivery Systems; D006358:Hot Temperature; D006801:Humans; D061986:MCF-7 Cells; D013010:Sonication; D047408:gamma-Cyclodextrins / Q000737:chemistry*
chemical_list: D000903:Antibiotics, Antineoplastic; D047408:gamma-Cyclodextrins; D004317:Doxorubicin
keywords: Cyclodextrin; Doxorubicin; Drug delivery; Hyperthermia; MRI guided Focused Ultrasound; Sonoporation