Adenovirus infection induces loss of HLA class I and CD3 antigens, but does not induce cell surface presentation of the La (SS-B) autoantigen.
Antibodies to the RNA polymerase III transcription termination factor La are frequently found in the serum of patients with various autoimmune diseases. The mechanisms by which autoimmune responses are evoked remain largely obscure, but the presentation of autoantigens on the cell surface during stress conditions has been reported as a possible factor. In this study we analysed the effects of adenovirus infection on the binding of anti-La antibodies to the surface of several human cell lines and on the levels of the membrane-expressed glycoproteins HLA class I, CD44 and the CD3 complex. In addition, we studied the relative amount and the intracellular distribution of the La protein as well as its association with the major species of non-coding virus-associated (VAI) RNA. While immunofluorescence patterns revealed a redistribution and possibly cell surface expression of the La protein during infection, this could not be confirmed by other techniques. In contrast, surface levels of HLA class I proteins and CD3 complex were severely affected. The data suggest that the subcellular distribution of the La protein is not detectably influenced by adenovirus infection.
Peek
R
R
Department of Biochemistry, University of Nijmegen, The Netherlands.
Westphal
J R
JR
Pruijn
G J
GJ
Van der Kemp
A J
AJ
Van Venrooij
W J
WJ
D000258:Adenovirus Infections, Human / Q000276:immunology* / Q000378:metabolism / Q000382:microbiology; D017951:Antigen Presentation; D001324:Autoantigens / Q000378:metabolism*; D017252:CD3 Complex / Q000378:metabolism*; D002352:Carrier Proteins / Q000378:metabolism; D002460:Cell Line; D002462:Cell Membrane / Q000276:immunology / Q000378:metabolism; D005455:Fluorescent Antibody Technique; D015395:Histocompatibility Antigens Class I / Q000378:metabolism*; D006801:Humans; D018960:Hyaluronan Receptors; D020733:RNA, Small Cytoplasmic; D012367:RNA, Viral / Q000378:metabolism; D011956:Receptors, Cell Surface / Q000378:metabolism; D016201:Receptors, Lymphocyte Homing / Q000378:metabolism; D012261:Ribonucleoproteins / Q000378:metabolism*; D013347:Subcellular Fractions / Q000276:immunology / Q000378:metabolism; D000097585:SS-B Antigen; D000099207:SS-A Antigen
D001324:Autoantigens; D017252:CD3 Complex; D002352:Carrier Proteins; D015395:Histocompatibility Antigens Class I; D018960:Hyaluronan Receptors; D020733:RNA, Small Cytoplasmic; D012367:RNA, Viral; D011956:Receptors, Cell Surface; D016201:Receptors, Lymphocyte Homing; D012261:Ribonucleoproteins; D000097585:SS-B Antigen; D000099207:SS-A Antigen; C116006:RO60 protein, human