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    Keywords: CELLS ; EXPRESSION ; carcinoma ; CELL ; Germany ; human ; GENE ; GENE-EXPRESSION ; GENES ; PROTEIN ; PROTEINS ; MOLECULES ; COMPLEX ; COMPLEXES ; KERATINOCYTES ; BOVINE PAPILLOMAVIRUS ; DOWN-REGULATION ; GROWTH-FACTOR RECEPTOR ; papillomavirus ; MOLECULE ; MHC ; TRANSPORT ; IDENTIFICATION ; LESIONS ; gene expression ; DESIGN ; DIFFERENCE ; PLASMA ; MEMBRANE ; STRESS ; SPECTROMETRY ; human papillomavirus ; TYPE-16 ; MASS-SPECTROMETRY ; SURFACE ; CLASS-I ; EPITHELIAL-CELL LINE ; GOLGI-APPARATUS ; HUMAN-PAPILLOMAVIRUS ; MHC class I ; MHC CLASS-I ; CARCINOMAS ; DIFFERENTIAL EXPRESSION ; MEMBRANE PROTEIN ; HaCaT ; MEMBRANE-PROTEIN ; GEL-ELECTROPHORESIS ; MASSES ; E5 PROTEIN ; CERVICAL NEOPLASIA
    Abstract: Membrane proteins differentially expressed in human papillomavirus type 16 (HPV-16) E5-transfected HaCaT cells have been identified. Membrane proteins were isolated and separated by two-dimensional gel electrophoresis. Spots showing quantitative differences between E5-transfected and control cells were extracted and the proteins were identified by nanoelectrospray ionization mass spectrometry. A total of 24 spots was analysed. Among the proteins showing differential expression, a decreased amount of calnexin and increased expression of hsp70, proteins both involved in maturation and transport of MHC class I complexes to the plasma membrane, were noticed. These findings correlate with the decreased surface expression of MHC class I molecules described in E5-expressing cells, HPV-positive cervical lesions and cervical carcinomas. These results stress the value of the proteomic approach, as used here in the experimental design, which allows the correlation of changes in host gene expression with biological functions of viral genes
    Type of Publication: Journal article published
    PubMed ID: 15166425
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