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M9640853.TXT
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1996-03-04
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Document 0853
DOCN M9640853
TI Diversity of immunobiological functions of T-cell lines established from
patients with adult T-cell leukaemia.
DT 9604
AU Iwatsuki K; Harada H; Motoki Y; Kaneko F; Jin F; Takigawa M; Department
of Dermatology, Fukushima Medical College, Japan.
SO Br J Dermatol. 1995 Dec;133(6):861-7. Unique Identifier : AIDSLINE
MED/96150394
AB In order to understand the variety of HTLV-1-associated cutaneous
diseases, we studied the cytological profile of HTLV-1-infected T-cell
lines established from patients with adult T-cell leukaemia (ATL). Among
four CD4+ cell lines, termed 16T(-), 35T(-), MH-1, and KS-2, the 16T(-)
cells secreted elevated quantities of IL-4, IL-6 and IFN-gamma and
expressed mRNA for each cytokine in the absence of exogenous
stimulation. The 35T(-) cells secreted IL-6 and a small amount of
IFN-gamma, but not IL-4. The MH-1 and KS-2 cells secreted only IL-6 in
the absence of stimulation. In response to stimulation with
phorbol-12-myristate-13 acetate (PMA), the 16T(-) cells produced more
IL-4 and IFN-gamma, whereas the 35T(-) and MH-1 cells exhibited
increased secretion of IFN-gamma, but still no IL-4 or IL-4 mRNA
production. Although neither IL-4 nor IFN-gamma were found in the
culture supernatant of KS-2 cells, the production of IL-4 mRNA was
detected by RT-PCR. Culture supernatants from the 16T(-) and 35T(-)
cells induced the expression of intercellular adhesion molecule-1
(ICAM-1) and HLA-DR by cultured keratinocytes. This response was
inhibited by pretreatment of the supernatant with anti-IFN-gamma
antibodies. These results indicate that some HTLV-1-infected T-cell
lines constitutively secrete various cytokines, including biologically
active IFN-gamma. The diversity of immunobiological functions of the
T-cell lines may be related to the variety of clinical features present
in ATL patients.
DE Adult Antigens, Viral/ANALYSIS Base Sequence Cell Line Culture
Media, Conditioned/PHARMACOLOGY Cytokines/ANALYSIS DNA
Primers/GENETICS DNA, Viral/ANALYSIS Human HLA-DR Antigens/METABOLISM
*HTLV-I/GENETICS/IMMUNOLOGY Intercellular Adhesion
Molecule-1/METABOLISM Keratinocytes/METABOLISM Leukemia,
T-Cell/*IMMUNOLOGY/VIROLOGY Molecular Sequence Data Polymerase Chain
Reaction RNA, Messenger/ANALYSIS T-Lymphocytes/*IMMUNOLOGY JOURNAL
ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).