Abstract：
:Infected cell protein 10 (ICP10) or antigen 4 (Ag4) and infected cell-specific protein 11/12 (ICSP11/12) have been suggested as specific antigenic markers for cervical carcinoma. Experiments were designed to determine whether ICP10 and ICSP11/12 are distinct antigens and to determine the cellular localization of ICP10. Results indicate that an apparent 160 kdalton (kDa) protein analyzed by 8.5% polyacrylamide gels (= 144 kDa protein analyzed by 7.0% polyacrylamide gels) was detected in HSV-2-infected but not mock-infected extracts. This protein is an early virus-induced protein appearing 2-4 h after HSV-2 infection, and it was synthesized in the presence of successive blocks with cycloheximide and actinomycin D. These properties are characteristic for ICP10 (Ag4), thus establishing the identity of the 160 kDa/144 kDa protein as ICP10. Furthermore, Western blot analyses indicated that ICP10 and ICSP11/12 are distinct antigens recognized by antibodies in sera from immune rabbit or human cervical carcinoma patients. In addition, monoclonal antibodies to the HSV-2-induced ribonucleotide reductase were reactive with ICP10. Antibodies in sera from rabbits immunized against ICP10 and monoclonal antibodies to the HSV-2-induced ribonucleotide reductase were reactive with antigens on the plasma membrane surface of HSV-2-infected cells. Also, the reactivity of monoclonal antibodies with these antigens was blocked by the rabbit antibodies based on immunofluorescence analyses. These data provide evidence that ICP10 is antigenically distinct from ICSP11/12, and that ICP10 is present on the plasma membrane of HSV-2-infected cells. Also, our data confirm and extend the tentative identification of ICP10 with the HSV-2-induced ribonucleotide reductase recently suggested by Bacchetti et al. (J. Virol. 49, 591-593, 1984).
journal_name
Virus Resjournal_title
Virus researchauthors
Flanders RT,Kucera LS,Raben M,Ricardo MJ Jrdoi
10.1016/0168-1702(85)90012-7subject
Has Abstractpub_date
1985-04-01 00:00:00pages
245-60issue
3eissn
0168-1702issn
1872-7492pii
0168-1702(85)90012-7journal_volume
2pub_type
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