Linked Life Data

12959615

Source:http://linkedlifedata.com/resource/pubmed/id/12959615

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
2003-9-8
pubmed:abstractText
An oligodeoxynucleotide (ODN) conjugated to poly(ethylene glycol) (PEG) through a pH-responsive ester linkage (PEG-ODN conjugate) was successfully synthesized by the Michael reaction of 3'-thiol-modified ODN with a heterobifunctional PEG bearing an acetal group at the alpha-end and an acrylate group at the omega-end (acetal-PEG-acrylate), aimed at the development of a novel ODN delivery system. The prepared PEG-ODN conjugate and linear-poy(ethyleneimine) (L-PEI) spontaneously associated to form a polyion complex (PIC) micelle whose diameter and polydispersity index micro(2)/Gamma(2)) were 102.5 nm and 0.096 as determined by DLS measurements, respectively. Both the PEG-ODN conjugate and PIC micelle showed cleavage of the ester linkage at the endosomal pH (=5.5), suggesting that the PIC micelle is anticipated to release the ODN in the intracellular compartment. Furthermore, the PEG-ODN conjugate in the PIC micelle was stable against deoxyribonuclase (DNase I) digestion and has no interaction with the serum component because of the steric stabilization of the highly dense PEG corona surrounding the PIC core. These characteristics of the PIC micelles entrapping the PEG-ODN conjugate are promising for their utility as a novel ODN delivery system.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
1525-7797
pubmed:author
pubmed:issnType
Print
pubmed:volume
4
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1426-32
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:articleTitle
pH-responsive oligodeoxynucleotide (ODN)-poly(ethylene glycol) conjugate through acid-labile beta-thiopropionate linkage: preparation and polyion complex micelle formation.
pubmed:affiliation
Department of Materials Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba 278-8510, Japan.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't