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M9620723.TXT
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1996-02-26
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Document 0723
DOCN M9620723
TI Production of inflammatory cytokines by Epstein-Barr virus
(EBV)-infected lymphoblastoid cell lines spontaneously originated from
the peripheral blood of patients with human immunodeficiency virus (HIV)
infection.
DT 9602
AU Roncella S; Baldi L; Cutrona G; Viale M; Rizzo F; Gasco M; Ferrarini M;
Pistoia V; Services of Clinical Immunology, National Institute for
Cancer; Research, Genoa, Italy.
SO Clin Immunol Immunopathol. 1995 Nov;77(2):162-71. Unique Identifier :
AIDSLINE MED/96036726
AB In this study we have raised spontaneous Epstein-Barr virus
(EBV)-positive lymphoblastoid cell lines (LCL) from the peripheral blood
of human immunodeficiency virus (HIV)-infected individuals and of
control patients with primary EBV infections. These LCLs were also
raised in the presence of the viral inhibitor phosphonoformate (PFA);
under these conditions, the in vitro infection of bystander B
lymphocytes with EBV released in culture by in vivo infected B cells is
inhibited. Thus, the latter LCLs are likely to represent the progeny of
B cells latently infected by EBV in vivo. The LCLs raised in the
presence or absence of PFA had the same phenotypic features, type of EBV
latency, and growth pattern irrespective of whether they had been raised
from HIV-seropositive individuals or patients with primary EBV
infections or had been generated by infecting normal B cells in vitro.
Studies on the production of inflammatory cytokines were conducted by
Northern blotting or by determining the cytokine concentrations in the
cell supernatants by immunoassays or bioassays. Three of eight LCLs from
HIV-seropositive patients released TNF alpha and 5/5 released TNF beta,
IL6 was present in the supernatants of 1/8 LCLs, and IL1 alpha and IL1
beta were not detected in any culture supernatant. No differences were
noticed in the patterns of cytokine secretion among the LCLs from
HIV-seropositive patients and in those raised from patients with primary
EBV infections or obtained by infecting normal B cells in vitro with
EBV. It is tempting to speculate that abnormally expanded EBV-harboring
B cells in HIV-seropositive patients may participate in the pathogenesis
of certain clinical manifestations by releasing inflammatory cytokines;
some of these cytokines might also contribute to the in vivo spreading
of HIV infection. However, the spontaneous LCLs from HIV-seropositive
individuals do not display abnormal features compared to latently
EBV-infected LCLs from other sources despite the high frequency of
EBV-driven lymphoproliferative disorders observed in AIDS patients.
DE Adult Cell Line Cytokines/*BIOSYNTHESIS/IMMUNOLOGY Female Flow
Cytometry Herpesvirus 4, Human/*ISOLATION & PURIF Human HIV
Infections/*BLOOD/IMMUNOLOGY Immunophenotyping
Lymphocytes/*IMMUNOLOGY/PATHOLOGY/*VIROLOGY Male RNA,
Messenger/BIOSYNTHESIS Support, Non-U.S. Gov't JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).