Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Chili peppers and inflammation: Researchers unravel mechanism of pain sensitivity

26.09.2002


Scientists at Massachusetts General Hospital (MGH) have discovered a common component to the burning sensation produced by chili peppers and the pain associated with arthritis. The finding, published in the September 26 issue of Neuron, could help scientists devise new strategies to block the pain hypersensitivity associated with inflammation.



"The receptor activated by chili peppers in the mouth and other tissues also increases in the terminals of sensory neurons in the skin after inflammation, and this contributes to pain hypersensitivity," says Clifford Woolf, MD, PhD, director of the Neural Plasticity Research Group in the Department of Anesthesia and Critical Care at MGH. A receptor is a protein that transports a chemical signal into a cell.

Woolf and lead author Ru-Rong Ji, PhD, also of the MGH Neural Plasticity Research Group, found that the increased production of the receptor following inflammation is mediated by a signal molecule called p38, located within sensory neurons. The chili pepper receptor, which is technically called TRPV1, responds to capsaicin, the chemical that is responsible for the "hot" in peppers. It also responds to actual heat and to low pH, a condition that occurs with inflammation.


"With these findings, we’re starting to understand why patients with arthritis or other inflammatory conditions are likely to have increased pain and sensitivity to heat," says Woolf. He and his research team were surprised to find that the activation of p38 can cause a twenty-fold increase in the amount of TRPV1 protein in the skin but not in the activity of the gene coding for TRPV1.

"This means that the chili pepper receptor is not being regulated by the gene being switched on but by more protein being produced, an unexpected form of regulation," says Ji. He also notes that their findings will open up new options for pain management. "We could use an inhibitor to p38 to block the increase in TRPV1, therefore blocking pain in patients who suffer from many diseases and conditions that involve inflammation."

Following inflammation, the activation of p38 is very precise. The scientists found that it is caused by a specific growth factor signal acting on a particular subset of pain sensory neurons. There are a variety of pain sensations that create different changes within neurons, and all of the signals that are generated have not yet been identified. Each new discovery, like the current finding by the MGH researchers, sheds light on these complex pathways and brings new treatment strategies closer.

Susan McGreevey | EurekAlert!
Further information:
http://www.mgh.harvard.edu/

More articles from Health and Medicine:

nachricht Norovirus evades immune system by hiding out in rare gut cells
12.10.2017 | University of Pennsylvania School of Medicine

nachricht Flexible sensors can detect movement in GI tract
11.10.2017 | Massachusetts Institute of Technology

All articles from Health and Medicine >>>

The most recent press releases about innovation >>>

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

Im Focus: Neutron star merger directly observed for the first time

University of Maryland researchers contribute to historic detection of gravitational waves and light created by event

On August 17, 2017, at 12:41:04 UTC, scientists made the first direct observation of a merger between two neutron stars--the dense, collapsed cores that remain...

Im Focus: Breaking: the first light from two neutron stars merging

Seven new papers describe the first-ever detection of light from a gravitational wave source. The event, caused by two neutron stars colliding and merging together, was dubbed GW170817 because it sent ripples through space-time that reached Earth on 2017 August 17. Around the world, hundreds of excited astronomers mobilized quickly and were able to observe the event using numerous telescopes, providing a wealth of new data.

Previous detections of gravitational waves have all involved the merger of two black holes, a feat that won the 2017 Nobel Prize in Physics earlier this month....

Im Focus: Smart sensors for efficient processes

Material defects in end products can quickly result in failures in many areas of industry, and have a massive impact on the safe use of their products. This is why, in the field of quality assurance, intelligent, nondestructive sensor systems play a key role. They allow testing components and parts in a rapid and cost-efficient manner without destroying the actual product or changing its surface. Experts from the Fraunhofer IZFP in Saarbrücken will be presenting two exhibits at the Blechexpo in Stuttgart from 7–10 November 2017 that allow fast, reliable, and automated characterization of materials and detection of defects (Hall 5, Booth 5306).

When quality testing uses time-consuming destructive test methods, it can result in enormous costs due to damaging or destroying the products. And given that...

Im Focus: Cold molecules on collision course

Using a new cooling technique MPQ scientists succeed at observing collisions in a dense beam of cold and slow dipolar molecules.

How do chemical reactions proceed at extremely low temperatures? The answer requires the investigation of molecular samples that are cold, dense, and slow at...

Im Focus: Shrinking the proton again!

Scientists from the Max Planck Institute of Quantum Optics, using high precision laser spectroscopy of atomic hydrogen, confirm the surprisingly small value of the proton radius determined from muonic hydrogen.

It was one of the breakthroughs of the year 2010: Laser spectroscopy of muonic hydrogen resulted in a value for the proton charge radius that was significantly...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

ASEAN Member States discuss the future role of renewable energy

17.10.2017 | Event News

World Health Summit 2017: International experts set the course for the future of Global Health

10.10.2017 | Event News

Climate Engineering Conference 2017 Opens in Berlin

10.10.2017 | Event News

 
Latest News

Ocean atmosphere rife with microbes

17.10.2017 | Life Sciences

Neutrons observe vitamin B6-dependent enzyme activity useful for drug development

17.10.2017 | Life Sciences

NASA finds newly formed tropical storm lan over open waters

17.10.2017 | Earth Sciences

VideoLinks
B2B-VideoLinks
More VideoLinks >>>