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Journal of Virology, February 1999, p. 1213-1218, Vol. 73, No. 2
Department of Pathology, Harvard Medical
School, Boston, Massachusetts 02115,1 and
Department of Human Nutrition Research Center, Tufts
University, Boston, Massachusetts 021112
Received 15 July 1998/Accepted 27 October 1998
Newborn mice of several inbred strains develop few or no tumors
following inoculation with highly tumorigenic strains of polyomavirus. Here we show that such resistant strains can be divided into two groups
based on the responses of adult mice to radiation followed by virus
inoculation. Most strains show a radiation-sensitive form of resistance
(Rr-s) and develop tumors following radiation and virus
challenge. This type of resistance has previously been recognized as
immunological, based on T-cell responses against virus-encoded
neoantigen(s) expressed in tumor cells. Other strains exhibit a
radiation-resistant form of resistance (Rr-r) and fail to
develop tumors when treated in the same manner. Three additional
properties of Rr-r mice distinguish them from
Rr-s mice: (i) survival of newborns following inoculation
with a highly virulent and usually lethal strain of virus, (ii)
resistance to virus spread in newborns inoculated with either
tumorigenic or virulent virus strains, and (iii) dominant or
semidominant transmission of resistance in crosses with a highly
susceptible strain. The Rr-r phenotype reflects a
constitutive nonimmunological type of resistance that is targeted to
the virus and blocks its dissemination.
0022-538X/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
Radiation-Resistant and Radiation-Sensitive Forms
of Host Resistance to Polyomavirus
*
Corresponding author. Mailing address: Department of
Pathology, Harvard Medical School, 200 Longwood Ave., Boston, MA 02115. Phone: (617) 432-1960. Fax: (617) 277-5291. E-mail:
benjamin{at}warren.med.harvard.edu.
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