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1996-02-26
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Document 0198
DOCN M9620198
TI Morphological changes in lymph nodes and expression of VCAM1 and
cytokines at the late stages of SIV-induced disease in rhesus monkeys.
DT 9602
AU Persidsky Y; Steffan AM; Gendrault JL; Royer C; Beyer C; Muchmore E;
Kirn A; Aubertin AM; Unite INSERM 74, France.
SO Res Virol. 1995 May-Jun;146(3):185-200. Unique Identifier : AIDSLINE
MED/96075769
AB Four patterns of structural alterations were found in lymph nodes (LNs)
from rhesus monkeys 17 to 34 months after infection with simian
immunodeficiency virus (SIV-mac251). SIV p27gag antigen and viral
particles were localized either between the processes of follicular
dendritic cells (FDCs) or in the cytoplasm of macrophages. In
hyperplastic follicles, enlarged germinal centres contained numerous
Ki67+ proliferating centroblasts which were rather rare in light zones
occupied by the CD23+ FDC network. Involuted follicles contained a small
number of Ki67+ centroblasts and the CD23 labelling was limited to a
very small apical zone. A correlation was found between the
morphological characteristics of the follicles (hyperplasia-involution)
and the level of expression of the vascular cell adhesion molecule 1
(VCAM1) on FDCs. A gradient in VCAM1 intensity with no expression in the
subcapsular-intermediary sinuses, low membrane labelling in the mantle
and strong expression in the FDC network was observed. IL1 alpha+ and
IL6+ (interleukin) cells (lymphocytes and macrophages) were detected in
the mantle, the interfollicular area and the medulla of LNs. Expression
of the tumour necrosis factor alpha and ultrastructural markers of
interferon alpha production were found in a few FDC and macrophages. Our
findings indicate a close relationship between the morphofunctional
properties of FDC and the LN structure in SIV infection.
DE Animal Antigens, Viral/BIOSYNTHESIS Cell Line Cytokines/*BIOSYNTHESIS
Gene Products, gag/METABOLISM Lymph Nodes/IMMUNOLOGY/*ULTRASTRUCTURE
Macaca mulatta Receptors, IgE/BIOSYNTHESIS Simian Acquired
Immunodeficiency Syndrome/IMMUNOLOGY/*PATHOLOGY *SIV/ULTRASTRUCTURE
Vascular Cell Adhesion Molecule-1/*BIOSYNTHESIS JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).