Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
2006-7-4
pubmed:abstractText
Idiotypic sequences, specific to the hypervariable regions of immunoglobulins expressed by malignant B cells offer a therapeutic target in B cell lymphoma. Efficient approaches have been described to clone a single chain fragment of the tumor immunoglobulin (Ig) comprising of heavy and light Ig chains (sFv) fused with proinflammatory chemokines. Tumor associated, poorly immunogenic self antigens encoded by plasmid DNA (pDNA) have been rendered immunogenic by chemokine fusion, thereby targeting to antigen presenting cells (APCs) which differentially express chemokine receptors. Here we present an injectable (parenteral) approach using synthetic polymer based cationic microparticle formulations for enhancing the potency of such chemokine/self antigen expressing plasmid construct. Branched and linear polyethyleneimine (PEI) were conjugated on poly (D, L lactide-co-glycolide) (PLGA) microparticles using carbodiimide chemistry followed by efficient loading of plasmid DNA. In addition to imparting significant buffering ability to these cationic microparticles, flow cytometry studies indicate that these DNA loaded microparticles significantly up regulate CD80 and MHC class II markers in phagocytic RAW264.7 cells, indicating intrinsic adjuvant effects. Intradermal injections in Balb/c mice with these formulations induced significant protection upon tumor challenge with 2.5 times the minimal lethal dose. Long term survival rates were significant (p < 0.05) in comparison with saline injected controls or blank microparticles. Further studies indicated that intramuscular delivery might provide better protection compared to intradermal injections and perform similar to gene gun mediated administration. We conclude, based on these promising in vivo results, that such surface-functionalized microparticles offer an attractive strategy to improve the potency of self antigen-based cancer DNA vaccines.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
http://linkedlifedata.com/resource/pubmed/chemical/Antigens, CD80, http://linkedlifedata.com/resource/pubmed/chemical/Cancer Vaccines, http://linkedlifedata.com/resource/pubmed/chemical/Immunoglobulin Variable Region, http://linkedlifedata.com/resource/pubmed/chemical/Lactic Acid, http://linkedlifedata.com/resource/pubmed/chemical/Monocyte Chemoattractant Proteins, http://linkedlifedata.com/resource/pubmed/chemical/Polyethyleneimine, http://linkedlifedata.com/resource/pubmed/chemical/Polyglycolic Acid, http://linkedlifedata.com/resource/pubmed/chemical/Polymers, http://linkedlifedata.com/resource/pubmed/chemical/Recombinant Fusion Proteins, http://linkedlifedata.com/resource/pubmed/chemical/Vaccines, DNA, http://linkedlifedata.com/resource/pubmed/chemical/polylactic acid-polyglycolic acid...
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
0168-3659
pubmed:author
pubmed:issnType
Print
pubmed:day
20
pubmed:volume
113
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
261-70
pubmed:meshHeading
pubmed-meshheading:16793161-Animals, pubmed-meshheading:16793161-Antigens, CD80, pubmed-meshheading:16793161-Cancer Vaccines, pubmed-meshheading:16793161-Cell Line, Tumor, pubmed-meshheading:16793161-Cell Survival, pubmed-meshheading:16793161-Immunoglobulin Variable Region, pubmed-meshheading:16793161-Lactic Acid, pubmed-meshheading:16793161-Lymphoma, B-Cell, pubmed-meshheading:16793161-Macrophages, pubmed-meshheading:16793161-Mice, pubmed-meshheading:16793161-Mice, Inbred BALB C, pubmed-meshheading:16793161-Microspheres, pubmed-meshheading:16793161-Molecular Structure, pubmed-meshheading:16793161-Monocyte Chemoattractant Proteins, pubmed-meshheading:16793161-Neoplasm Transplantation, pubmed-meshheading:16793161-Polyethyleneimine, pubmed-meshheading:16793161-Polyglycolic Acid, pubmed-meshheading:16793161-Polymers, pubmed-meshheading:16793161-Recombinant Fusion Proteins, pubmed-meshheading:16793161-Time Factors, pubmed-meshheading:16793161-Vaccines, DNA
pubmed:year
2006
pubmed:articleTitle
Prophylactic anti-tumor effects in a B cell lymphoma model with DNA vaccines delivered on polyethylenimine (PEI) functionalized PLGA microparticles.
pubmed:affiliation
Department of Biomedical Engineering, The University of Texas at Austin, ENS 610, C0800, 1 University Station, Austin, Texas 78712, USA.
pubmed:publicationType
Journal Article, Comparative Study