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Journal of Virology, April 2000, p. 3284-3292, Vol. 74, No. 7
Division of Virology, Department of
Neuropharmacology, The Scripps Research Institute, La Jolla, California
92037
Received 2 December 1999/Accepted 4 January 2000
Virus-specific cytotoxic T lymphocytes (CTL) at frequencies of
>1/1,000 are sufficient to cause insulin-dependent diabetes mellitus
(IDDM) in transgenic mice whose pancreatic
0022-538X/00/$04.00+0
Copyright © 2000, American Society for Microbiology. All rights reserved.
Virus-Induced Diabetes in a Transgenic Model: Role
of Cross-Reacting Viruses and Quantitation of Effector T Cells Needed
To Cause Disease
cells express as
"self" antigen a protein from a virus later used to initiate infection. The inability to generate sufficient effector CTL for other
cross-reacting viruses that fail to cause IDDM could be mapped to point
mutations in the CTL epitope or its COO
flanking region.
These data indicate that IDDM and likely other autoimmune diseases are
caused by a quantifiable number of T cells, that neither standard
epidemiologic markers nor molecular analysis with nucleic acid probes
reliably distinguishes between viruses that do or do not cause
diabetes, and that a single-amino-acid change flanking a CTL epitope
can interfere with antigen presentation and development of autoimmune
disease in vivo.
*
Corresponding author. Mailing address: Division of
Virology, Department of Neuropharmacology, The Scripps Research
Institute, 10550 N. Torrey Pines Rd., La Jolla, CA 92037. Phone: (858)
784-8054. Fax: (858) 784-9981. E-mail: mbaobo{at}scripps.edu.
This is publication no. 11201-NP from the Department of
Neuropharmacology, The Scripps Research Institute, La Jolla, Calif.
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