Acoustically-active microbubbles conjugated to liposomes: characterization of a proposed drug delivery vehicle.

Acoustically-active microbubbles conjugated to liposomes: characterization of a proposed drug delivery vehicle. Research Abstract Details 

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Acoustically-active microbubbles conjugated to liposomes: characterization of a proposed drug delivery vehicle. Abstract Text:

Azadeh Kheirolomoom,Paul A Dayton,Aaron F H Lum,Erika Little,Eric E Paoli,Hairong Zheng,Katherine W Ferrara,

A new acoustically-active delivery vehicle was developed by conjugating liposomes and microbubbles, using the high affinity interaction between avidin and biotin. Binding between microbubbles and liposomes, each containing 5% DSPE-PEG2kBiotin, was highly dependent on avidin concentration and observed above an avidin concentration of 10 nM. With an optimized avidin and liposome concentration, we measured and calculated as high as 1000 to 10,000 liposomes with average diameters of 200 and 100 nm, respectively, attached to each microbubble. Replacing avidin with neutravidin resulted in 3-fold higher binding, approaching the calculated saturation level. High-speed photography of this new drug delivery vehicle demonstrated that the liposome-bearing microbubbles oscillate in response to an acoustic pulse in a manner similar to microbubble contrast agents. Additionally, microbubbles carrying liposomes could be spatially concentrated on a monolayer of PC-3 cells at the focal point of ultrasound beam. As a result of cell-vehicle contact, the liposomes fused with the cells and internalization of NBD-cholesterol occurred shortly after incubation at 37 degrees C, with internalization of NBD-cholesterol substantially enhanced in the acoustic focus.

Acoustically-active microbubbles conjugated to liposomes: characterization of a proposed drug delivery vehicle. Publishing Authors By Initials

A Kheirolomoom,PA Dayton,AF Lum,E Little,EE Paoli,H Zheng,KW Ferrara,

For similar equipment and supplies: microbubbles research abstracts see: equipment and supplies: microbubbles research

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MEDLINE DATE:

Acoustically-active microbubbles conjugated to liposomes: characterization of a proposed drug delivery vehicle. Journal Published:

PUBLICATION TYPE: Research Support, N.I.H., Extr

Journal: Journal of controlled release : official journal o

VOLUME: 118

Page Numbers: 275-84

Journal Abbreviation:

ISSN: 1873-4995

DAY: 23

MONTH: 12

YEAR: 2006

Acoustically-active microbubbles conjugated to liposomes: characterization of a proposed drug delivery vehicle. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 8607908

Acoustically-active microbubbles conjugated to liposomes: characterization of a proposed drug delivery vehicle. Keywords Mesh Terms:

KEYWORDS: Microbubbles

MESH TERMS: administration & dosage

Chemical & Substance for Abstract: Acoustically-active microbubbles conjugated to liposomes: characterization of a proposed drug delivery vehicle. Information

Substance Name: Liposomes

Registry Number: 0

Grant and Affiliation Information for Acoustically-active microbubbles conjugated to liposomes: characterization of a proposed drug delivery vehicle.

AFFILIATION: University of California, Davis, Department of Biomedical Engineering, Davis, CA 95616, USA.

Country: Netherlands

AGENCY: United States NCI

GRANT: R01 CA103828-04

ACRONYM: CA

MEDLINETA: J Control Release

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