Linked Life Data

9792809

Source:http://linkedlifedata.com/resource/pubmed/id/9792809

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1998-11-23
pubmed:abstractText
The objective of this study is to present a rational strategy to target macromolecules to the nucleus via the endocytic pathway. The two major barriers in this route to the nucleus are known as endosomal escape and nuclear transport. pH-sensitive liposomes were used in order to achieve endosomal escape under the conditions of low pH in endosomes. Bovine serum albumin (alb) served as a model compound to be delivered to nucleus and was encapsulated into the pH-sensitive liposomes. The liposomes are composed of dioleoyl phosphatidyl ethanolamine: cholesterylhemisuccinate. They were taken up by rat peritoneal macrophages via endocytosis and subsequently underwent degradation, principally by lysosomal enzymes. By using pH-sensitive liposomes, intracellular degradation was reduced by a significant extent, as expected, via endosomal escape. Cytosolic delivery of FITC-labelled alb was also detected by confocal microscopy. Selective targeting to the nucleus was performed by adding the nuclear localization signal (NLS) of the SV-40 large T antigen to the FITC-alb, which were then encapsulated into the pH-sensitive liposomes. Confocal microscopy revealed that FITC-alb, in the presence of NLS was successfully delivered into nucleus, while no transport was observed in the absence of NLS. These results provide a useful strategy for the nuclear targeting of macromolecules using pH-sensitive liposomes in conjunction with NLS.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0006-291X
pubmed:author
pubmed:copyrightInfo
Copyright 1998 Academic Press.
pubmed:issnType
Print
pubmed:day
20
pubmed:volume
251
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
538-44
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1998
pubmed:articleTitle
Intracellular regulation of macromolecules using pH-sensitive liposomes and nuclear localization signal: qualitative and quantitative evaluation of intracellular trafficking.
pubmed:affiliation
Faculty of Pharmaceutical Sciences, The University of Tokushima, 1-78-1 Shomachi, Tokushima City, Tokushima, 770-8505, Japan.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't