home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Shareware Overload Trio 2
/
Shareware Overload Trio Volume 2 (Chestnut CD-ROM).ISO
/
dir26
/
med9408a.zip
/
M9480182.TXT
< prev
next >
Wrap
Text File
|
1994-08-09
|
3KB
|
49 lines
Document 0182
DOCN M9480182
TI Effect of human immunodeficiency virus type-1 envelope glycoprotein
gp160 on cytokine production from cord-blood T cells.
DT 9410
AU Than S; Oyaizu N; Pahwa RN; Kalyanaraman VS; Pahwa S; Department of
Pediatrics, North Shore University Hospital-Cornell; University Medical
College, Manhasset, NY 11030.
SO Blood. 1994 Jul 1;84(1):184-8. Unique Identifier : AIDSLINE MED/94289699
AB We have recently demonstrated that the human immunodeficiency virus type
1 (HIV-1) envelope glycoprotein gp160 enhances the in vitro
differentiation of hematopoietic myeloid progenitor cells derived from
cord blood by inducing secretion of colony-stimulating factor(s) (CSF)
in T cells, presumably through the interaction of gp160 with CD4
molecules. In this study, we investigated the gp 160-induced humoral
CSFs in cord blood by enzyme-linked immunosorbent assay (ELISA) and by
polymerase chain reaction on reverse-transcribed mRNA (RT-PCR). We
demonstrate that gp160 can induce interleukin (IL)-3, IL-6, and
granulocyte-macrophage CSF (GM-CSF) protein secretion only in purified
cord-blood T cells (CB-T) and not in detectable amounts in whole cord
blood cells (WCB); cytokine mRNA induction occurred in purified CB-T and
WCB, but was significantly greater in the former. Treatment of gp160
with soluble CD4 (sCD4) abolished the secretion of all three cytokines
in CB-T cells, which suggests that interaction of gp160 with CD4
molecules is required for the secretion of these cytokines from CB-T
cells. However, in WCB cells, sCD4 treatment of gp160 resulted in
inhibition of only IL-3 and GM-CSF mRNA, whereas IL-6 secretion was
enhanced. Purified cord-blood monocytes secreted only IL-6 in response
to gp160, and the gp160-induced IL-6 secretion by monocytes was also
further increased by gp160 + sCD4 complex. Furthermore, monocyte culture
supernatants suppressed gp160-induced IL-3 secretion from CB-T cells.
These findings indicate that (1) CB-T cells are a potent source of
gp160-induced hematopoietic cytokines, and (2) that different mechanisms
are involved in the induction of IL-6 by gp160 in the T- and non-T-cell
fractions of cord blood. The ability of HIV gp160 to induce
hematopoietic CSFs in cord blood may be important in HIV pathogenesis.
DE Antigens, CD4/PHYSIOLOGY Antigens, CD45/ANALYSIS Base Sequence
Cytokines/*BIOSYNTHESIS Fetal Blood/*METABOLISM Gene Products,
env/*PHARMACOLOGY Granulocyte-Macrophage Colony-Stimulating
Factor/BIOSYNTHESIS/ GENETICS Human *HIV-1 Infant, Newborn
Interleukin-3/BIOSYNTHESIS/GENETICS Interleukin-6/BIOSYNTHESIS/GENETICS
Molecular Sequence Data Protein Precursors/*PHARMACOLOGY RNA,
Messenger/ANALYSIS Support, U.S. Gov't, P.H.S.
T-Lymphocytes/*METABOLISM JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).