Linked Life Data

18543130

Source:http://linkedlifedata.com/resource/pubmed/id/18543130

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2008-10-6
pubmed:abstractText
Previous studies have shown that mRNA-electroporated dendritic cells (DCs) are able to process and present tumor-associated antigens, leading to the activation of tumor-specific T cells in vitro and in vivo. However, the optimal maturation state of antigen loading and half-life of the mRNA-translated protein product and its immunogenic epitopes are significant parameters, which needs to be clarified in order to establish an effective electroporation protocol. In addition, despite extensive experimental investigations and their widespread application in research and clinical environments, little is known of the extent to which the immunological properties of DCs are influenced by electrical fields of critical strengths. We found that the mRNA transfection of DCs after maturation with short and low-voltage square-wave electrical pulses resulted in higher level of antigen expression and viability in addition to higher T-cell stimulatory ability compared to transfection of DCs prior to maturation. Mature mRNA-electroporated DCs showed long-lived expression of EGFP and were able to stimulate influenza matrix protein M1 (M1)-specific T cells up to 24 h after electroporation. However, when DCs were subjected to increasing electrical pulses the level of transgene expression was four-fold upregulated, equipping these DCs to be more potent in inducing M1-specific T cells. Also, the application of long electrical pulses induced further upregulation of HLA-DR, CD80, and CD86 expression in mature DCs, but did not promote phenotypic or functional maturation in immature DCs. These findings support the concept of mRNA transfection of DCs after maturation and also highlight the possibility to use long electrical pulses for further improvement of the immune responses by mRNA-transfected DCs.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
1073-6085
pubmed:author
pubmed:issnType
Print
pubmed:volume
40
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
151-60
pubmed:meshHeading
pubmed:year
2008
pubmed:articleTitle
Studies on mRNA electroporation of immature and mature dendritic cells: effects on their immunogenic potential.
pubmed:affiliation
Department of Hematology, Center for Cancer Immune Therapy (CCIT), University Hospital Herlev, Herlev Ringvej 75, Copenhagen 2730, Herlev, Denmark. ozcmet01@heh.regionh.dk
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't