Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

New signaling step for key player in Crohn’s Disease

29.12.2004


This week, researchers report new findings that elucidate the role of NOD2, a key molecular player in Crohn’s Disease, in the cellular signaling pathways that control inflammatory responses. NOD2’s clinical relevance is clear from the fact that it is encoded by a Crohn’s Disease susceptibility gene. Understanding NOD2 has posed a particularly intriguing challenge for researchers because it appears able to somehow both activate and inhibit inflammatory cytokine responses in the cell. The work is reported by Lewis Cantley and colleagues at Harvard Medical School.



Crohn’s Disease is an autoimmune inflammatory disorder of the gastrointestinal tract and is histologically characterized by inflammation, epithelial ulceration, fissure formation, and stenosis of segments of the entire gastrointestinal tract. The disease leads to significant morbidity and is thought to result from an inappropriate immune response to bacteria that normally inhabit the gastrointestinal tract. Because Crohn’s Disease is characterized by too much initial acute inflammation, and, subsequently, too little subsequent negative regulation of that inflammatory response, pro-inflammatory and anti-inflammatory pathways appear to be faulty.

Previous work has shown that NOD2 acts as an intracellular receptor for bacteria and bacterial breakdown products, and because it appears capable of both activating and inhibiting inflammatory responses, NOD2 serves as a key integration point for the gastrointestinal tract’s response to infectious organisms. The biochemical nature of NOD2’s dichotomous role is unknown. In the new work, the researchers shed light on this problem by showing that NOD2 activation leads to the modification of NEMO, a central component of the NF-kB signaling pathway controlling inflammatory responses. NOD2 mutations responsible for Crohn’s Disease cause polymorphisms that prevent the NOD2 protein from properly modifying NEMO. These results suggest that this previously unrecognized modification on a component of the major inflammatory signaling pathway in the body helps to integrate inflammatory signals. These results also suggest that this signaling mechanism may ultimately represent a pharmacological target for the amelioration of Crohn’s Disease.


Derek W. Abbott, Andrew Wilkins, John M. Asara, and Lewis C. Cantley: "The Crohn’s Disease Gene, NOD2, Requires RIP2 in Order to Induce Ubiquitinylation of a Novel Site on NEMO"

Heidi Hardman | EurekAlert!
Further information:
http://www.cell.com
http://www.current-biology.com

More articles from Life Sciences:

nachricht Closing the carbon loop
08.12.2016 | University of Pittsburgh

nachricht Newly discovered bacteria-binding protein in the intestine
08.12.2016 | University of Gothenburg

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Significantly more productivity in USP lasers

In recent years, lasers with ultrashort pulses (USP) down to the femtosecond range have become established on an industrial scale. They could advance some applications with the much-lauded “cold ablation” – if that meant they would then achieve more throughput. A new generation of process engineering that will address this issue in particular will be discussed at the “4th UKP Workshop – Ultrafast Laser Technology” in April 2017.

Even back in the 1990s, scientists were comparing materials processing with nanosecond, picosecond and femtosesecond pulses. The result was surprising:...

Im Focus: Shape matters when light meets atom

Mapping the interaction of a single atom with a single photon may inform design of quantum devices

Have you ever wondered how you see the world? Vision is about photons of light, which are packets of energy, interacting with the atoms or molecules in what...

Im Focus: Novel silicon etching technique crafts 3-D gradient refractive index micro-optics

A multi-institutional research collaboration has created a novel approach for fabricating three-dimensional micro-optics through the shape-defined formation of porous silicon (PSi), with broad impacts in integrated optoelectronics, imaging, and photovoltaics.

Working with colleagues at Stanford and The Dow Chemical Company, researchers at the University of Illinois at Urbana-Champaign fabricated 3-D birefringent...

Im Focus: Quantum Particles Form Droplets

In experiments with magnetic atoms conducted at extremely low temperatures, scientists have demonstrated a unique phase of matter: The atoms form a new type of quantum liquid or quantum droplet state. These so called quantum droplets may preserve their form in absence of external confinement because of quantum effects. The joint team of experimental physicists from Innsbruck and theoretical physicists from Hannover report on their findings in the journal Physical Review X.

“Our Quantum droplets are in the gas phase but they still drop like a rock,” explains experimental physicist Francesca Ferlaino when talking about the...

Im Focus: MADMAX: Max Planck Institute for Physics takes up axion research

The Max Planck Institute for Physics (MPP) is opening up a new research field. A workshop from November 21 - 22, 2016 will mark the start of activities for an innovative axion experiment. Axions are still only purely hypothetical particles. Their detection could solve two fundamental problems in particle physics: What dark matter consists of and why it has not yet been possible to directly observe a CP violation for the strong interaction.

The “MADMAX” project is the MPP’s commitment to axion research. Axions are so far only a theoretical prediction and are difficult to detect: on the one hand,...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ICTM Conference 2017: Production technology for turbomachine manufacturing of the future

16.11.2016 | Event News

Innovation Day Laser Technology – Laser Additive Manufacturing

01.11.2016 | Event News

#IC2S2: When Social Science meets Computer Science - GESIS will host the IC2S2 conference 2017

14.10.2016 | Event News

 
Latest News

Closing the carbon loop

08.12.2016 | Life Sciences

Applicability of dynamic facilitation theory to binary hard disk systems

08.12.2016 | Physics and Astronomy

Scientists track chemical and structural evolution of catalytic nanoparticles in 3-D

08.12.2016 | Materials Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>