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M94A0349.TXT
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1994-10-08
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Document 0349
DOCN M94A0349
TI Transfer of HIV-1 to human tonsillar stromal cells following
cocultivation with infected lymphocytes.
DT 9412
AU Degrassi A; De Maria A; Lisignoli G; Zini N; Sabatelli P; Cirillo L;
Monaco MC; Hilbert DM; Ambesi-Impiombato FS; Maraldi NM; et al;
Dipartimento di Patologia e Medicina Sperimentale e Clinica,; Universita
di Udine, Italy.
SO AIDS Res Hum Retroviruses. 1994 Jun;10(6):675-82. Unique Identifier :
AIDSLINE MED/94355112
AB The susceptibility of normal human tonsillar stromal cells (HTSCs) to
infection by HIV-1 was assessed using transmission electron microscopy
(TEM), immunocytochemistry, and HIV-1-specific PCR analyses. Our results
demonstrate that HTSCs are efficiently infected following cocultivation
with the HIV-1-infected lymphoblastoid cell line GY1. Infected stromal
cells contain intracellular viral particles present as free virus or
associated with phagocytic vesicles. These particles express the
HIV-1-specific p24 antigen as assessed by immunocytochemical analyses
using an HIV-specific anti-p24 monoclonal antibody. Moreover, PCR
analysis of genomic DNA isolated from particle-bearing tonsillar stromal
cells identified HIV-1-specific sequences not present in either
uninfected stromal cells or parental GY1 uninfected cells. The mechanism
by which HIV-1 infects HTSCs does not appear to be CD4 mediated, as none
of the human tonsillar stromal cell lines express CD4 as assessed by
flow cytometry, immunohistochemistry, and PCR analysis. Taken together,
these results demonstrate that human tonsillar stromal cells can be
infected by HIV-1, and that subsequent to infection the viral genome is
reverse transcribed, and integrated into the stromal cell DNA. The
infection of HTSCs may contribute to HIV-1-mediated pathogenesis
indirectly as a viral reservoir or directly by structural and functional
modification of the lymphoid microenvironment.
DE Antibodies, Monoclonal B-Lymphocytes/*MICROBIOLOGY/ULTRASTRUCTURE Cell
Line Genes, gag Human HIV Infections/*TRANSMISSION
HIV-1/GENETICS/IMMUNOLOGY/ULTRASTRUCTURE Polymerase Chain Reaction
Stromal Cells/MICROBIOLOGY/ULTRASTRUCTURE Support, Non-U.S. Gov't
Tonsil/*MICROBIOLOGY/ULTRASTRUCTURE JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).