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Document 0717
DOCN M9620717
TI Differential effect of TGF-beta 1 on the in vitro activation of HTLV-I
and the proliferative response of CD8+ T lymphocytes in patients with
HTLV-I-associated myelopathy (HAM/TSP).
DT 9602
AU Nagai M; Ijichi S; Hall WW; Osame M; Third Department of Internal
Medicine, Faculty of Medicine,; Kagoshima University, Japan.
SO Clin Immunol Immunopathol. 1995 Dec;77(3):324-31. Unique Identifier :
AIDSLINE MED/96080361
AB While considerable information is available on the pathogenesis of human
T lymphotropic virus type I (HTLV-I)-associated myelopathy/tropical
spastic paraparesis (HAM/TSP), fundamental questions remain unanswered.
In particular the clinicopathological uniformity of the disorder among
patients remains poorly understood. The potential role of TGF-beta as a
preferential immune regulator in the CNS and the functional
heterogeneity of TGF-beta has led us to assess the possible involvement
of this cytokine in the pathogenic process. To investigate this, the
modulatory effects of TGF-beta 1 on HTLV-I-induced in vitro phenomena
were evaluated using fractionated lymphocytes from patients with
HAM/TSP. It could be shown that the proliferative response of CD8+ cells
against cultured and irradiated autologous CD4+ cells possessing HTLV-I
antigens was significantly inhibited by TGF-beta 1. However, the in
vitro activation of HTLV-I, which was evaluated by spontaneous
proliferation of CD4+ cells, was unaffected by TGF-beta 1. The induction
of intracytoplasmic HTLV-I antigens in cultured CD4+ cells was
facilitated by TGF-beta 1 in a dose-dependent manner. These findings
suggest that TGF-beta may have a critical role in localized viral
activation within the CNS in patients with HAM/TSP.
DE Adult Aged Cell Line Cells, Cultured CD4-Positive T-Lymphocytes/DRUG
EFFECTS/VIROLOGY CD8-Positive T-Lymphocytes/*DRUG EFFECTS/VIROLOGY
Female Human HTLV-I/*DRUG EFFECTS/IMMUNOLOGY Lymphocyte
Transformation/DRUG EFFECTS Male Middle Age Paraparesis, Tropical
Spastic/*IMMUNOLOGY Transforming Growth Factor beta/*PHARMACOLOGY
Virus Activation/*DRUG EFFECTS JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).