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M9550807.TXT
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1995-03-25
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37 lines
Document 0807
DOCN M9550807
TI Thymus involvement in murine acquired immunodeficiency (MAIDS).
DT 9505
AU Colombi S; Deprez M; De Leval L; Humblet C; Greimers R; Defresne MP;
Boniver J; Moutschen M; Laboratory of Pathology, University of Liege,
Belgium.
SO Thymus. 1994;23(1):27-37. Unique Identifier : AIDSLINE MED/95167709
AB Due to self-renewal of the peripheral pool of T-cells, adult thymectomy
has normally little influence on immunocompetence. However, thymus might
play a more important role in the setting of viral-induced cytopathic
effects on T-cells in the periphery. Therefore, thymus weight, cell
numbers, and subset distribution were sequentially analysed after
infection with RadLV-Rs, a viral mixture known to induce murine
retrovirus induced immunodeficiency (MAIDS). Infection induced thymic
atrophy (concerning organ weight as well as total cell number) which
culminated seven weeks after inoculation. The atrophic process mostly
reflected the depletion of double positive CD4+ CD8+ cells since their
proportion sharply decreased around week 6. Single positive T-cells were
less affected by the process. The proportion of B-cells progressively
increased. Surprisingly, there was a strong correlation between the
extent of atrophy and the frequency of B-cells in the thymus. Finally,
an abnormal CD4+ T-cell subset lacking Thy-1 and previously described in
the periphery also appeared in the thymus and its frequency was strongly
correlated with the expansion of B-cells in this organ.
DE Animal Antigens, Thy-1/IMMUNOLOGY B-Lymphocytes/IMMUNOLOGY Carrier
Proteins/BIOSYNTHESIS Cell Differentiation/IMMUNOLOGY Flow Cytometry
Male Mice Mice, Inbred C57BL Murine Acquired Immunodeficiency
Syndrome/*IMMUNOLOGY/VIROLOGY Radiation Leukemia Virus Receptors, Cell
Surface/BIOSYNTHESIS Receptors, Lymphocyte Homing/BIOSYNTHESIS
Support, Non-U.S. Gov't T-Lymphocyte Subsets/*IMMUNOLOGY/VIROLOGY
Thymus Gland/*PATHOLOGY/VIROLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).