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M9621020.TXT
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1996-02-26
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Document 1020
DOCN M9621020
TI Syncytium formation in cultured human lymphoid tissue: fusion of
implanted HIV glycoprotein 120/41-expressing cells with native CD4+
cells.
DT 9602
AU Margolis LB; Glushakova S; Baibakov B; Zimmerberg J; Laboratory of
Theoretical and Physical Biology, National; Institute of Child Health
and Human Development, National; Institutes of Health, Bethesda,
Maryland 20892, USA.
SO AIDS Res Hum Retroviruses. 1995 Jun;11(6):697-704. Unique Identifier :
AIDSLINE MED/96078230
AB While glycoprotein gp120/41 clearly causes HIV-infected cells to form
syncytia in monolayers and in suspension, there is unfortunately scant
knowledge on syncytium formation in tissues. We implanted
gp120/41-expressing cells labeled with fluorescent particles inside
blocks of human lymphoid tissue kept in long-term histoculture. Observed
by confocal microscopy, together with immunohistochemical and
morphological analysis of implanted cells, more than one-third of these
gp120/41-expressing cells fused with native CD4+ cells of the host
tissue, yielding small (three to five nuclei) syncytia. Such widespread
fusion of gp120/41-expressing cells in tissue in vitro, together with
the finding of increased virulence of syncytium-inducing isolates of
HIV, support the hypothesis that syncytium formation within lymph tissue
of HIV-infected individuals contributes to AIDS pathogenesis. This
system and the methods developed may provide a way to study HIV-infected
cells inside the very tissue whose destruction may prevent immune system
repopulation.
DE Antigens, CD20/ANALYSIS Antigens, CD3/ANALYSIS *Cell Fusion
CD4-Positive T-Lymphocytes/*CYTOLOGY/VIROLOGY Giant Cells/CYTOLOGY
Hela Cells Human HIV Envelope Protein gp120/*PHYSIOLOGY HIV Envelope
Protein gp41/*PHYSIOLOGY *HIV-1 Tissue Culture
Tonsil/IMMUNOLOGY/*VIROLOGY Vaccinia Virus/GENETICS JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).