Trilateral tumors in four different lines of transgenic mice expressing SV40 T-antigen

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Publication Type Journal Article
School or College School of Medicine
Department Ophthalmology
Creator Baehr, Wolfgang
Other Author Marcus, D M; Lasudry, J G; Carpenter, J L; Windle, J; Howes, K A; al-Ubaidi, M R; Overbeek, P A; Font, R L; Albert, D M
Title Trilateral tumors in four different lines of transgenic mice expressing SV40 T-antigen
Date 1996
Description PURPOSE. A line of transgenic mice containing the simian virus (SV) 40 T-antigen (T-ag) gene driven by the beta-luteinizing hormone (BLH) promoter developed bilateral retinoblastoma and primitive neuroectodermal tumors (PNET) of the midbrain. Midbrain tumors arose from the subependymal layer of the cerebral aqueduct. Bilateral ocular and brain tumors ("trilateral") were found in three other SV40 T-ag transgenic murine lines containing different promoters (murine interphotoreceptor retinoid-binding protein (IRBP), human IRBP, and alpha A-crystallin). To gain insight into the regulatory mechanisms involved in central nervous system tumorigenesis, the authors examined brain tumors from four lines of SV40 T-ag mice with different promoters. METHODS. Formalin-fixed brain tumors were examined from four lines of transgenic mice containing different promoters linked to the protein coding region of the enhancerless SV40 T-ag oncogene. Transgenes contained the following promoters: BLH, mouse 1.8-kb IRBP, human 1.3-kb IRBP, and alpha A-crystallin. RESULTS. Mice with a 1.8-kb IRBP promoter develop retinal photoreceptor and pineal tumors. Intracranial tumors arising from the subependymal layer of the third ventricle also were observed. Mice with a 1.3-kb IRBP promoter exhibit bilateral retinal PNET and PNET originating from the subependymal layer of the third ventricle. Mice with the alpha A-crystallin promoter exhibit bilateral lens tumors and PNET of the midbrain. CONCLUSIONS. Ocular tumors in these mice may be ascribed to the promoter-driven, tissue-specific expression of SV40 T-ag. The common finding of PNET arising from the subependymal layer of the diencephalon is unlikely to be promoter related. These findings indicate that a regulatory region specific to the subependymal layer of the cerebral aqueduct and third ventricle resides in the structural region of the SV40 T-ag gene.
Type Text
Publisher Association for Research in Vision and Ophthalmology
Volume 37
Issue 2
First Page 392
Last Page 396
Subject Mice, Transgenic; Retinol-Binding Proteins; Eye Proteins
Subject MESH Brain Neoplasms; Eye Neoplasms; Antigens, Polyomavirus Transforming
Language eng
Bibliographic Citation Marcus DM, Lasudry JG, Carpenter JL, Windle J, Howes KA, al-Ubaidi MR, Baehr W, Overbeek PA, Font RL, Albert DM. (1996). Trilateral tumors in four different lines of transgenic mice expressing SV40 T-antigen. Invest Ophthalmol Vis Sci, 37(2), 392-6
Rights Management (c) Association for Research in Vision and Ophthalmology
Format Medium application/pdf
Identifier ir-main,1721
ARK ark:/87278/s6qr5fmz
Setname ir_uspace
Date Created 2012-06-13
Date Modified 2021-05-06
ID 705839
Reference URL https://collections.lib.utah.edu/ark:/87278/s6qr5fmz
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