Linked Life Data

19104823

Source:http://linkedlifedata.com/resource/pubmed/id/19104823

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2009-2-2
pubmed:abstractText
A growing body of evidence suggests that optimal induction of systemic anti-tumor immunity requires priming of both the CD4+ and CD8+ T cells that are specific for tumor-associated antigens (TAA). Recently, it was shown that MHC class II positive tumor cells are able to induce tumor-specific CD4+ T cells, and that this event may improve clinical outcome. This has rekindled the interest in modulating MHC class II expression in nonprofessional antigen presenting tumor cells. The class II transactivator (CIITA) is a major regulator of MHC class I and class II expression. We compared, in head and neck cancer cell lines, the effect of stable overexpression of CIITA to treatment with IFN-gamma on the cell surface expression profile of MHC class I and II molecules. Here, we provide evidence that CIITA transfection is more effective than IFN-gamma in inducing MHC class II expression. To more thoroughly explore the mechanisms of MHC class II induction in this context, we used RT-PCR to measure the mRNA expression pattern of HLA-DR, HLA-DM, cathepsin S, and the invariant chain. In contrast to the effect of treatment with IFN-gamma, CIITA transfection did not induce cathepsin S, an important protease responsible for the degradation of the invariant chain, and thus for binding of the peptides to the MHC class II binding groove. These findings may have a significant impact on practical and clinical aspects of tumor immunotherapeutic strategies.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
1432-069X
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
301
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
189-93
pubmed:dateRevised
2011-11-17
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
CIITA versus IFN-gamma induced MHC class II expression in head and neck cancer cells.
pubmed:affiliation
Department of Dermatology, Johann Wolfgang Goethe-University, 60590 Frankfurt, Germany. markus.meissner@kgu.de
pubmed:publicationType
Journal Article