Abstract
A line of transgenic mice containing the simian virus 40 (SV40) large tumor antigen gene under the control of the viral enhancer-promoter expressed this viral protein in the brains of these mice within the first 2 weeks after birth. Multiple foci of anaplastic cells formed in the choroid plexuses of these mice at 36 to 41 days after birth, and normal tissue coexisted with these transformed foci. Immunoperoxidase staining to detect the SV40 T antigen showed tumor-specific expression of nuclear T antigen at late times in tumor development, approximately 90 to 100 days and thereafter. The level of SV40 T antigen, on a per cell basis, appeared to be lower in the great majority of choroid plexus cells at earlier times in tumor development. These results suggest that low levels of tumor antigen (14 to 36 days) are present before detectable pathology (36 to 41 days) and the level of T antigen per cell is higher in rapidly growing late-stage tumors (older than 90 days).
Full text
PDF
Images in this article
Selected References
These references are in PubMed. This may not be the complete list of references from this article.
- Brinster R. L., Chen H. Y., Messing A., van Dyke T., Levine A. J., Palmiter R. D. Transgenic mice harboring SV40 T-antigen genes develop characteristic brain tumors. Cell. 1984 Jun;37(2):367–379. doi: 10.1016/0092-8674(84)90367-2. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Burnette W. N. "Western blotting": electrophoretic transfer of proteins from sodium dodecyl sulfate--polyacrylamide gels to unmodified nitrocellulose and radiographic detection with antibody and radioiodinated protein A. Anal Biochem. 1981 Apr;112(2):195–203. doi: 10.1016/0003-2697(81)90281-5. [DOI] [PubMed] [Google Scholar]
- Hanahan D. Heritable formation of pancreatic beta-cell tumours in transgenic mice expressing recombinant insulin/simian virus 40 oncogenes. Nature. 1985 May 9;315(6015):115–122. doi: 10.1038/315115a0. [DOI] [PubMed] [Google Scholar]
- Ornitz D. M., Palmiter R. D., Messing A., Hammer R. E., Pinkert C. A., Brinster R. L. Elastase I promoter directs expression of human growth hormone and SV40 T antigen genes to pancreatic acinar cells in transgenic mice. Cold Spring Harb Symp Quant Biol. 1985;50:399–409. doi: 10.1101/sqb.1985.050.01.050. [DOI] [PubMed] [Google Scholar]
- Palmiter R. D., Chen H. Y., Messing A., Brinster R. L. SV40 enhancer and large-T antigen are instrumental in development of choroid plexus tumours in transgenic mice. Nature. 1985 Aug 1;316(6027):457–460. doi: 10.1038/316457a0. [DOI] [PubMed] [Google Scholar]
- Stewart T. A., Pattengale P. K., Leder P. Spontaneous mammary adenocarcinomas in transgenic mice that carry and express MTV/myc fusion genes. Cell. 1984 Oct;38(3):627–637. doi: 10.1016/0092-8674(84)90257-5. [DOI] [PubMed] [Google Scholar]
- Van Dyke T., Finlay C., Levine A. J. A comparison of several lines of transgenic mice containing the SV40 early genes. Cold Spring Harb Symp Quant Biol. 1985;50:671–678. doi: 10.1101/sqb.1985.050.01.082. [DOI] [PubMed] [Google Scholar]