Linked Life Data

19063898

Source:http://linkedlifedata.com/resource/pubmed/id/19063898

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
2009-3-3
pubmed:abstractText
The role of actin in transcription and RNA processing is now widely accepted but the form of nuclear actin remains enigmatic. Monomeric, oligomeric or polymeric forms of actin seem to be involved in nuclear functions. Moreover, uncommon forms of actin such as the "lower dimer" have been observed in vitro. Antibodies have been pivotal in revealing the presence and distribution of different forms of actin in different cellular locations. Because of its high degree of conservation, actin is a poor immunogen and only few specific actin antibodies are available. To unravel the mystery of less common forms of actin, in particular those in the nucleus, we chose to tailor monoclonal antibodies to recognize distinct forms of actin. To increase the immune response, we used a new approach based on peptide nanoparticles, which are designed to mimic an icosahedral virus capsid and allow the repetitive, ordered display of a specific epitope on their surface. Actin sequences representing the highly conserved "hydrophobic loop," which is buried in the filamentous actin filament, were grafted onto the surface of nanoparticles by genetic engineering. After immunization with "loop nanoparticles," a number of monoclonal antibodies were established that bind to the hydrophobic loop both in vitro and in situ. Immunofluorescence studies on cells revealed that filamentous actin filaments were only labeled once the epitope had been exposed. Our studies indicate that self-assembling peptide nanoparticles represent a versatile platform that can easily be customized to present antigenic determinants in repetitive, ordered arrays and elicit an immune response against poor antigens.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Mar
pubmed:issn
1089-8638
pubmed:author
pubmed:issnType
Electronic
pubmed:day
13
pubmed:volume
386
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1368-81
pubmed:dateRevised
2010-11-18
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
Peptide nanoparticles serve as a powerful platform for the immunogenic display of poorly antigenic actin determinants.
pubmed:affiliation
M. E. Müller Institute for Structural Biology, Biozentrum, University of Basel, Klingelbergstrasse 70, CH-4056 Basel, Switzerland.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't