PLASMA LEUKAEMIA INHIBITORY FACTOR, INTERLUEKIN 6 AND SOLUBLE INTERLEUKIN 6 RECEPTOR LEVELS DURING CARDIOPULMONARY BYPASS WITH EXTRACORPOREAL CIRCULATION

Cytokine ◽  
1998 ◽  
Vol 10 (4) ◽  
pp. 303-306 ◽  
Author(s):  
Yves Denizot ◽  
Valérie Lorgeot ◽  
Elisabeth Cornu ◽  
Nathalie Nathan
Keyword(s):  
Cardiopulmonary Bypass ◽  
Extracorporeal Circulation ◽  
Interleukin 6 ◽  
Inhibitory Factor ◽  
Leukaemia Inhibitory Factor ◽  
Interleukin 6 Receptor

scholarly journals R-200. Endometrial interleukin-6 and leukaemia inhibitory factor—regulation by oestradiol, progesterone, and cytokines

1999 ◽  
Vol 14 (Suppl_3) ◽  
pp. 368-368
Author(s):  
T. Strowitzki ◽  
M. von Wolff ◽  
C.J. Thaler ◽  
S. Stieger ◽  
C. Zepf ◽  
...  
Keyword(s):  
Interleukin 6 ◽  
Inhibitory Factor ◽  
Leukaemia Inhibitory Factor

scholarly journals Oncostatin M, leukaemia-inhibitory factor and interleukin 6 trigger different effects on α1-proteinase inhibitor synthesis in human lung-derived epithelial cells

1998 ◽  
Vol 329 (2) ◽  
pp. 335-339 ◽  
Author(s):  
Joanna CICHY ◽  
Stefan ROSE-JOHN ◽  
James TRAVIS
Keyword(s):  
Epithelial Cells ◽  
Interleukin 6 ◽  
Proteinase Inhibitor ◽  
Human Lung ◽  
Biological Activities ◽  
Oncostatin M ◽  
Inhibitory Factor ◽  
Leukaemia Inhibitory Factor ◽  
Common Signal

Interleukin 6 (IL-6), oncostatin M (OSM) and leukaemia-inhibitory factor (LIF) share a common signal-transducing subunit in each of their receptors and thus mediate an overlapping spectrum of biological activities. Although all of these cytokines stimulate the production of α1-proteinase inhibitor (α1-PI) in hepatocyte-derived cells, only OSM is able to up-regulate levels of this inhibitor in epithelial cells originating from the lung. In this study we characterized human lung-derived epithelial-like HTB58 cells for their ability to synthesize α1-PI after treatment with IL-6, OSM and LIF. The results demonstrate that the resistance of HTB58 cells to the effects of IL-6 and LIF was not because of a lack of their individual functional receptors and suggest that OSM utilizes two different receptors, gp130/LIF receptor and gp130/OSM receptor, in lung-derived epithelial cells.

scholarly journals Serum levels of interleukin-6 type cytokines and soluble interleukin-6 receptor in patients with rheumatoid arthritis

1998 ◽  
Vol 7 (5) ◽  
pp. 347-353 ◽  
Author(s):  
T. Robak ◽  
A. Gladalska ◽  
H. Stepień ◽  
E. Robak
Keyword(s):  
Rheumatoid Arthritis ◽  
Interleukin 6 ◽  
Disease Duration ◽  
Serum Levels ◽  
Leukaemia Inhibitory Factor ◽  
Enzyme Linked Immunosorbent Assay ◽  
Control Group ◽  
Healthy Controls ◽  
Normal Individuals ◽  
Interleukin 6 Receptor

We investigated the serum concentrations of interleukin-6 (IL-6) and two IL-6 family of cytokines (leukaemia inhibitory factor (LIF) and ciliary neurotrophic factor (CNTF) as well as IL-6 soluble receptor (sIL-6R) using an enzyme-linked immunosorbent assay (ELISA) in 66 patients with rheumatoid arthritis (RA) and 24 healthy controls. We examined a possible association between the serum levels of these peptides and RA activity according to the Mallya and Mace scoring system and Ritchie's index. We also evaluated the correlation between the serum levels of IL-6, LIF, CNTF and sIL-6R and duration of the disease and calculated sIL-6R/IL-6 ratio in RA patients and in the control group. IL-6 and sIL-6R were detectable in all 66 patients with RA and 24 normal individuals. LIF was also found in the serum of all patients with RA and in 16 (66.7%) normal individuals. In contrast CNTF was measurable only in 15 (22.7%) patients with RA and 24 (33.3%) normal individuals. The highest IL-6 and sIL-6R levels were found in the patients with Stages 3 and 4 of RA activity and the lowest in the control group. In contrast there were no statistically significant diferences between the LIF and CNTF levels in RA patients and normal individuals. We found positive correlation between IL-6 and sIL-6R concentrations and Ritchie's index and a lack of such correlation with LIF and CNTF. IL-6 serum level correlated positively with the disease duration, but sIL-6R, LIF and CNTF did not. Serum sIL-6R/IL-6 ratio was significantly lower in RA patients than in healthy controls. In conclusion, an increase in the serum levels of IL-6 and sIL-6R, but not LIF and CNTF concentrations, may be useful markers for RA activity.

scholarly journals Evidence for the formation of a heterotrimeric complex of leukaemia inhibitory factor with its receptor subunits in solution

1997 ◽  
Vol 325 (3) ◽  
pp. 693-700 ◽  
Author(s):  
Jian-Guo ZHANG ◽  
Catherine M. OWCZAREK ◽  
Larry D. WARD ◽  
Geoffrey J. HOWLETT ◽  
Louis J. FABRI ◽  
...  
Keyword(s):  
Interleukin 6 ◽  
Equilibrium Analysis ◽  
Inhibitory Factor ◽  
Sedimentation Equilibrium ◽  
Leukaemia Inhibitory Factor ◽  
Mouse Serum ◽  
Stable Complex ◽  
Resonance Spectroscopy ◽  
High Affinity ◽  
Α Chain

Leukaemia inhibitory factor (LIF) is a polyfunctional cytokine that is known to require at least two distinct receptor components (LIF receptor α-chain and gp130) in order to form a high-affinity, functional, receptor complex. Human LIF binds with unusually high affinity to a naturally occurring mouse soluble LIF receptor α-chain, and this property was used to purify a stable complex of human LIF and mouse LIF receptor α-chain from pregnant-mouse serum. Recombinant soluble human gp130 was expressed, with a FLAG® epitope (DYKDDDDK) at the N-terminus, in the methylotropic yeast Pichia pastoris and purified using affinity chromatography. The formation of a trimeric complex in solution was established by native gel electrophoresis, gel-filtration chromatography, sedimentation equilibrium analysis, surface plasmon resonance spectroscopy and chemical cross-linking. The stoichiometry of this solution complex was 1:1:1, in contrast with that of the complex of interleukin-6, the interleukin-6-specific low-affinity receptor subunit and gp130, which is 2:2:2.

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