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M9550109.TXT
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1995-03-04
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Document 0109
DOCN M9550109
TI IL-4 renders mast cells functionally responsive to endothelin-1.
DT 9505
AU Egger D; Geuenich S; Denzlinger C; Schmitt E; Mailhammer R; Ehrenreich
H; Dormer P; Hultner L; GSF-Institute for Experimental Hematology,
Munich, Germany.
SO J Immunol. 1995 Feb 15;154(4):1830-7. Unique Identifier : AIDSLINE
MED/95138527
AB It has previously been shown that mouse bone marrow-derived mast cells
(BMMC) synthesize and secrete endothelin-1 (ET-1) and express ETA-type
endothelin receptors (ETA-R). The study presented here was designed to
elucidate the influence of different cytokine conditions for cellular
differentiation and maturation on the ability of primary mouse BMMC to
respond to exogenous ET-1. BMMC were grown for 2 wk in IL-3 alone and
then cultured for 2 to 3 wk with kit ligand (KL) and/or IL-3 in the
presence or absence of IL-4. ET-1 induced a very rapid (< or = 1 min)
and dose-dependent release of histamine and serotonin from BMMC cultured
in the presence of both IL-3 and IL-4. The effect of ET-1 was
quantitatively comparable with IgE/Ag-induced mediator release and
comprised up to 20% and 16% of total cellular histamine and serotonin,
respectively. In BMMC grown with KL or KL plus IL-3, a substantial
effect of ET-1 on amine release was only observed when IL-4 had been
included in the culture medium. These IL-4 effects could not be observed
if BMMC grown in IL-3 and/or KL were preincubated for 1 or 24 h with
IL-4 before activation with ET-1, suggesting that a differentiation
process rather than a functional priming effect had been initiated by
IL-4. In BMMC, the histamine and serotonin release induced by ET-1
(10(-6) M) was inhibited by an ETA-R-specific antagonist (cyclic
[D-Asp-Pro-D-Val-Leu-D-Trp]) in a dose-dependent manner, with complete
inhibition at an antagonist concentration of 10(-8) M. ET-1 stimulated
leukotriene C4 biosynthesis up to 4.5-fold in BMMC cultured in the
presence of IL-4. No such ET-1 effect was observed in BMMC cultured in
media containing IL-3, KL, or a combination of both cytokines.
Peritoneal cells (containing 2 to 3% serosal mast cells) obtained from
BALB/c mice released 87 +/- 2% of histamine within 1 min after challenge
with ET-1. Our results demonstrate that ET-1 can directly act as a
histamine and serotonin secretagogue and as a stimulator of leukotriene
C4 production in mast cells. IL-4 appears to be critically involved in
the differentiation of immature mast cell precursors to an ET-1-reactive
phenotype.(ABSTRACT TRUNCATED AT 400 WORDS)
DE Amino Acid Sequence Animal Bone Marrow/CYTOLOGY Cell
Differentiation/DRUG EFFECTS Cells, Cultured Comparative Study
Dose-Response Relationship, Drug Endothelins/*PHARMACOLOGY
Hematopoietic Cell Growth Factors/PHARMACOLOGY Histamine
Liberation/DRUG EFFECTS Interleukin-3/PHARMACOLOGY
Interleukin-4/*PHARMACOLOGY Leukotriene C4/BIOSYNTHESIS Mast
Cells/*DRUG EFFECTS/SECRETION Mice Mice, Inbred BALB C Molecular
Sequence Data Organ Specificity Peritoneal Cavity/CYTOLOGY Receptors,
Endothelin/ANTAGONISTS & INHIB/PHYSIOLOGY Recombinant
Proteins/PHARMACOLOGY Serotonin/SECRETION Support, Non-U.S. Gov't Th2
Cells/IMMUNOLOGY JOURNAL ARTICLE
SOURCE: National Library of Medicine. NOTICE: This material may be
protected by Copyright Law (Title 17, U.S.Code).