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Document 0365
DOCN M9610365
TI Paralysis caused by acute myelitis in Theiler's murine encephalomyelitis
virus strain GD VII infection is induced by CD4+ lymphocytes
infiltrating the spinal cord.
DT 9601
AU Kohanawa M; Asano M; Min Y; Minagawa T; Nakane A; Department of
Microbiology, Hokkaido University School of; Medicine, Sapporo, Japan.
SO J Gen Virol. 1995 Sep;76 ( Pt 9):2251-6. Unique Identifier : AIDSLINE
MED/96005046
AB Intravenous infection by Theiler's murine encephalomyelitis virus strain
GD VII causes acute encephalomyelitis and paralysis in infected mice.
However, nude mice and cyclophosphamide-treated ddY mice did not show
paralysis when they were able to survive until day 20 post-infection
(p.i.). Of ddY mice infected with 5 x 10(7) p.f.u./mouse, 70-80% showed
symptoms of paralysis on day 20 p.i. The viral titres in the brain and
spinal cord in infected mice were not significantly different between
paralytic and non-paralytic mice. In all of the mice infected with the
virus, CD4+ lymphocytes and CD8+ lymphocytes had infiltrated the brain
on days 10, 12, 14 and 20 p.i. as demonstrated by flow cytometric
analysis. In contrast, few T lymphocytes infiltrated the spinal cord in
the non-paralytic mice. Administration of an anti-CD4 monoclonal
antibody (MAb) or anti-T cell receptor-alpha beta MAb on day 6 p.i.
inhibited paralysis until day 20 p.i., though 20% of the MAb-treated
mice and 80% of the control mice showed paralysis. Administration of
anti-CD8 MAb was not effective in the suppression of paralysis. The MAb
treatment did not significantly augment viral replication in the spinal
cord, although the viral titres in the brain of the MAb-treated mice
increased significantly. After the transfer of spleen cells from
infected C3H mice, the recipient mice infected with a small amount of
the virus showed paralysis, though uninfected mice did not. This
transfer could be blocked by CD4+ lymphocyte depletion of the donor
mice. These results indicate that paralysis caused by acute myelitis in
Theiler's virus strain GD VII infection is induced by CD4+ lymphocytes
infiltrating the spinal cord.
DE Acute Disease Animal Brain/IMMUNOLOGY/VIROLOGY Cell Line
Cyclophosphamide/PHARMACOLOGY CD4-Positive T-Lymphocytes/*IMMUNOLOGY
CD8-Positive T-Lymphocytes/IMMUNOLOGY Female Flow Cytometry
Immunosuppressive Agents/PHARMACOLOGY Immunotherapy, Adoptive
Lymphocyte Depletion Male Mice Mice, Inbred C3H Mice, Inbred ICR
Mice, Nude Paralysis/IMMUNOLOGY/*VIROLOGY
Poliomyelitis/*IMMUNOLOGY/VIROLOGY Polioviruses,
Murine/*IMMUNOLOGY/PHYSIOLOGY Receptors, Antigen, T-Cell,
alpha-beta/IMMUNOLOGY Spinal Cord/*IMMUNOLOGY Spleen/CYTOLOGY Virus
Replication JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).