Abstract:
:Medullary thyroid carcinoma (MTC) is a rare human tumor affecting the calcitonin-secreting c-cells of the thyroid. Here we report that two independent strains of transgenic mice expressing a Polyomavirus (Py) truncated middle-T antigen (deltaMT), consisting of the amino-terminal 304 amino acids, and the full length Py small-T antigen, developed multifocal bilateral MTCs with 100% penetrance. Occasionally one strain also developed mammary and bone tumors. Furthermore, offspring from both transgenic lines displayed pronounced waviness of the whiskers and fur, previously associated with defective epidermal growth factor receptor signaling. Transgene transcription, driven by the homologous early promoter/enhancer, and the corresponding translation products were detected in tumors and in many other organs which did not develop pathologies. The subcellular distribution of deltaMT and its interactions with the adapter proteins of the SHC family have also been analysed. Our study describes a novel murine model of MTC and provides evidence that the N-terminal 304 amino acid fragment of Py middle-T antigen, possibly in co-operation with small-T antigen, acts as a potent oncogene in c-cells of the thyroid.
journal_name
Oncogenejournal_title
Oncogeneauthors
Felici A,Giorgio M,Krauzewicz N,Della Rocca C,Santoro M,Rovere P,Manni I,Amati P,Pozzi Ldoi
10.1038/sj.onc.1202578subject
Has Abstractpub_date
1999-04-08 00:00:00pages
2387-95issue
14eissn
0950-9232issn
1476-5594journal_volume
18pub_type
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