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Journal of Virology, January 1999, p. 334-342, Vol. 73, No. 1
0022-538X/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
Accessing Epstein-Barr Virus-Specific T-Cell Memory
with Peptide-Loaded Dendritic Cells
I. V.
Redchenko and
A. B.
Rickinson*
CRC Institute for Cancer Studies, University
of Birmingham, Edgbaston, Birmingham, B15 2TA United Kingdom
Received 20 July 1998/Accepted 17 September 1998
The conventional means of studying Epstein-Barr virus (EBV)-induced
cytotoxic T-lymphocyte (CTL) memory, by in vitro stimulation with the
latently infected autologous lymphoblastoid cell line (LCL), has
important limitations. First, it gives no information on memory to
lytic cycle antigens; second, it preferentially amplifies the dominant
components of latent antigen-specific memory at the expense of key
subdominant reactivities. Here we describe an alternative approach,
based on in vitro stimulation with epitope peptide-loaded dendritic
cells (DCs), which allows one to probe the CTL repertoire for any
individual reactivity of choice; this method proved significantly more
efficient than stimulation with peptide alone. Using this approach we
first show that reactivities to the immunodominant and subdominant
lytic cycle epitopes identified by T cells during primary EBV infection
are regularly detectable in the CTL memory of virus carriers; this
implies that in such carriers chronic virus replication remains under
direct T-cell control. We further show that subdominant latent cycle
reactivities to epitopes in the latent membrane protein LMP2, though
rarely undetectable in LCL-stimulated populations, can be reactivated
by DC stimulation and selectively expanded as polyclonal CTL lines; the
adoptive transfer of such preparations may be of value in targeting
certain EBV-positive malignancies.
*
Corresponding author. Mailing address: CRC Institute
for Cancer Studies, University of Birmingham, Edgbaston, Birmingham, B15 2TA United Kingdom. Phone: 121-414-4492. Fax: 121-414-4486. E-mail:
Williamsd{at}cancer.bham.ac.uk.
Journal of Virology, January 1999, p. 334-342, Vol. 73, No. 1
0022-538X/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.
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