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Journal of Virology, March 2006, p. 2206-2215, Vol. 80, No. 5
0022-538X/06/$08.00+0 doi:10.1128/JVI.80.5.2206-2215.2006
Copyright © 2006, American Society for Microbiology. All Rights Reserved.
Laure K. Case,
Christa L. Starling, and
Tatyana V. Golovkina*
The Jackson Laboratory, 600 Main Street, Bar Harbor Maine 04609
Received 9 September 2005/ Accepted 7 December 2005
Mouse mammary tumor virus (MMTV), a well-characterized retrovirus that causes mammary tumors in susceptible mice, is commonly used to investigate virus-host interactions. We have shown that YBR/Ei mice demonstrate a novel, dominant mechanism of resistance to MMTV infection and MMTV-induced mammary tumors. MMTV can both establish infection in YBR/Ei mice and be transmitted by YBR/Ei mice as an infectious virus. However, virus production is severely attenuated, resulting in gradual clearance of infection in successive generations. Our transfer experiments showed that T cells generated in MMTV-infected resistant mice were required to restrict MMTV replication in susceptible mice. These results emphasize the importance of inducing T-cell responses for effective protection against retroviral infections.
Present address: University of Chicago, Department of Microbiology, 920 E. 58th Street, Chicago, IL 60637.
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