Linked Life Data

16206204

Source:http://linkedlifedata.com/resource/pubmed/id/16206204

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2006-3-2
pubmed:abstractText
Vascular access grafts implanted in dialysis patients are prone to failure in the long-term because of stenosis and occlusion caused by neointimal hyperplasia. Local delivery of antiproliferative drugs may be effective to prevent this consequence while minimizing the systemic side effects they cause. We developed a combination of poly(lactide-co-glycolide) (PLGA) microspheres with ReGel, an injectable copolymer, as a sustained-release system for perivascular delivery of an antiproliferative drug, dipyridamole. Dipyridamole-incorporated PLGA microspheres with various molecular weights (MWs) of PLGA were prepared by oil-in-water emulsion method. Encapsulation efficiency and surface morphology of microspheres were characterized. In vitro release kinetics of dipyridamole from ReGel or from microspheres/ReGel was experimentally determined. Without microspheres, 40% of the dipyridamole was released from ReGel as an initial burst in the first 3 days followed by continuous release in the subsequent 2 weeks. The use of PLGA microspheres decreased the initial burst and extended dipyridamole release from 23 to 35 days with increasing MW of PLGA. The highest MW PLGA showed a lag time of 17 days before consistent drug release occurred. Mixing microspheres and ReGel with two different MW PLGA achieved a continuous release for 35 days with little initial burst. In vivo release of dipyridamole from microspheres/ReGel exhibited a comparable release pattern to that seen in vitro. This injectable platform is a promising technique for sustained perivascular delivery of antiproliferative drugs.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
1552-4973
pubmed:author
pubmed:issnType
Print
pubmed:volume
77
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
135-43
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed-meshheading:16206204-Animals, pubmed-meshheading:16206204-Biocompatible Materials, pubmed-meshheading:16206204-Blood Vessels, pubmed-meshheading:16206204-Delayed-Action Preparations, pubmed-meshheading:16206204-Dipyridamole, pubmed-meshheading:16206204-Drug Carriers, pubmed-meshheading:16206204-Drug Delivery Systems, pubmed-meshheading:16206204-Humans, pubmed-meshheading:16206204-Lactic Acid, pubmed-meshheading:16206204-Materials Testing, pubmed-meshheading:16206204-Microspheres, pubmed-meshheading:16206204-Molecular Weight, pubmed-meshheading:16206204-Particle Size, pubmed-meshheading:16206204-Platelet Aggregation Inhibitors, pubmed-meshheading:16206204-Polyglycolic Acid, pubmed-meshheading:16206204-Polymers, pubmed-meshheading:16206204-Rats, pubmed-meshheading:16206204-Surface Properties, pubmed-meshheading:16206204-Swine, pubmed-meshheading:16206204-Viscosity
pubmed:year
2006
pubmed:articleTitle
Development of a sustained-release system for perivascular delivery of dipyridamole.
pubmed:affiliation
Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, 84108, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S., Research Support, Non-U.S. Gov't, Evaluation Studies, Research Support, N.I.H., Extramural