Abstract |
Soluble cytokine receptors are frequently found in human serum, most of them possessing antagonistic properties. The Interleukin 6 receptor (IL-6R) is found as a transmembrane protein on hepatocytes and subsets of leukocytes, but soluble isoforms of the IL-6R (sIL-6R) are generated by alternative splicing or by limited proteolysis of the ADisintegrin And Metalloproteinases (ADAM) gene family members ADAM10 and ADAM17. Importantly, the sIL-6R in complex with its ligand Interleukin 6 (IL-6) has agonistic functions and requires cells expressing the signal transducing ß-receptor gp130 but not the membrane-bound IL-6R. We have called this process IL-6 trans-signaling. Naturally occurring isoforms of soluble gp130 ( sgp130), which are generated by alternative splicing, are natural inhibitors of IL-6 trans-signaling, leaving IL-6 classic signaling via the membrane-bound IL-6R unaffected. We used recombinant sgp130Fc protein and recently generated transgenic mice expressing high levels of sgp130Fc to discriminate between classic and trans-signaling in vivo, and demonstrated that IL-6 trans-signaling is critically involved in generation and maintenance of several inflammatory and autoimmune diseases including chronic inflammatory bowel disease, rheumatoid arthritis, peritonitis and asthma, as well as inflammation-induced colon cancer.
|
Authors | Athena Chalaris, Christoph Garbers, Björn Rabe, Stefan Rose-John, Jürgen Scheller |
Journal | European journal of cell biology
(Eur J Cell Biol)
2011 Jun-Jul
Vol. 90
Issue 6-7
Pg. 484-94
ISSN: 1618-1298 [Electronic] Germany |
PMID | 21145125
(Publication Type: Journal Article, Research Support, Non-U.S. Gov't, Review)
|
Copyright | Copyright © 2010 Elsevier GmbH. All rights reserved. |
Chemical References |
|
Topics |
- Animals
- Humans
- Inflammation
(genetics, immunology, metabolism)
- Mice
- Neoplasms
(genetics, immunology, metabolism)
- Receptors, Interleukin-6
(biosynthesis, genetics, immunology, metabolism)
- Signal Transduction
|