home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
The Arsenal Files 6
/
The Arsenal Files 6 (Arsenal Computer).ISO
/
health
/
med9605a.zip
/
M9650193.TXT
< prev
next >
Wrap
Text File
|
1996-03-09
|
2KB
|
40 lines
Document 0193
DOCN M9650193
TI Default development of cloned human naive CD4 T cells into
interleukin-4- and interleukin-5- producing effector cells.
DT 9605
AU Yang LP; Byun DG; Demeure CE; Vezzio N; Delespesse G; University of
Montreal, Louis-Charles Simard Research Center,; Notre-Dame Hospital,
Montreal, Canada.
SO Eur J Immunol. 1995 Dec;25(12):3517-20. Unique Identifier : AIDSLINE
MED/96140696
AB It was recently demonstrated that naive human and mouse CD4 T cells
release low but sufficient levels of interleukin (IL)-4 at priming to
support their development into IL-4 producers. To determine whether this
IL-4 is produced by a minor subset of cells, freshly isolated human
naive CD4 T cells were directly cloned by limiting dilution in the
absence of exogenous IL-4. More than 95% of neonatal and 60% of adult
naive T cells seeded in single-cell cultures could be expanded upon
stimulation with anti-CD3 mAb immobilized on CD32-B7.1 L cell
transfectants in the presence of IL-2. All 171 clones derived from four
neonates and two adults produced IL-4 and IL-5 at generally high levels.
Like the allergen-specific human Th2 clones described in the literature,
these T cell clones produced little or no interferon-gamma upon
stimulation via their T cell receptor/CD3 complex, whereas they released
high levels of this cytokine when activated with phorbol 12-myristate
13-acetate+ionomycin. Cells cloned and expanded in the presence of
anti-IL4 + anti-IL-4R mAb produced much lower levels of IL-4 and IL-5.
It is concluded that almost every single naive human CD4 T cell primed
and expanded in the absence of exogenous IL-4 releases sufficient
autocrine IL-4 to support its clonal expansion into high IL-4/IL-5
producers.
DE Adult Cell Differentiation/IMMUNOLOGY Clone Cells CD4-Positive
T-Lymphocytes/CYTOLOGY/*METABOLISM Fetal Blood/IMMUNOLOGY Human
Infant, Newborn Interleukin-4/*BIOSYNTHESIS
Interleukin-5/*BIOSYNTHESIS Lymphocyte Transformation Support,
Non-U.S. Gov't Th2 Cells/CYTOLOGY/*METABOLISM JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).