Linked Life Data

18796710

Source:http://linkedlifedata.com/resource/pubmed/id/18796710

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
Pt 10
pubmed:dateCreated
2008-9-17
pubmed:abstractText
Human cytomegalovirus (HCMV) infection suppresses cellular immunity and results in viral persistence. Dendritic cells (DCs) are susceptible to HCMV, and the development and immune function of HCMV-infected DCs are impaired in vitro. HCMV-derived proteins interfere with different aspects of major histocompatibility complex type II (MHC II) maturation and function in genetically engineered cellular models. This study directly analysed the effect of HCMV on the MHC II-associated antigen processing and presentation machinery in HCMV-infected human DCs in vitro. HCMV-infected DCs failed to mature newly synthesized MHC II to the final stage of SDS-stable MHC II alphabeta dimer/peptide complexes, in contrast to mock-infected controls. MHC II biosynthesis was delayed and reduced, whilst MHC II stability remained unchanged. MHC II surface expression was decreased in the late phase of HCMV infection. In addition, infected DCs decreased the transcription rate of the MHC II-associated proteases cathepsins S, Z, B, H and L and asparagine-specific endopeptidase (AEP). This translated into reduced protein expression of cathepsins H and S, as well as AEP, and less-efficient proteolytic degradation of a peptide substrate by endocytic proteases from HCMV-infected DCs in vitro. Thus, HCMV infection interferes with MHC II biosynthesis and maturation, as well as with the expression and function of endocytic proteases in infected DCs.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0022-1317
pubmed:author
pubmed:issnType
Print
pubmed:volume
89
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2427-36
pubmed:meshHeading
pubmed:year
2008
pubmed:articleTitle
Human cytomegalovirus infection interferes with major histocompatibility complex type II maturation and endocytic proteases in dendritic cells at multiple levels.
pubmed:affiliation
Department of Virology, University of Tübingen, Tübingen, Germany.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't