Navigation Links
Programmed destruction
Date:3/18/2013

Stroke, heart attacks and numerous other common disorders result in a massive destruction of cells and tissues called necrosis. It's a violent event: As each cell dies, its membrane ruptures, releasing substances that trigger inflammation, which in turn can cause more cellular necrosis. A new Weizmann Institute study may help develop targeted therapies for controlling the tissue destruction resulting from inflammation and necrosis.

The study, conducted in the laboratory of Prof. David Wallach of the Biological Chemistry Department, focused on a group of signaling enzymes, including caspase 8, which was discovered by Wallach nearly two decades ago. Earlier studies by scientists in the United States, China and Europe had shown that this group of proteins induces "programmed," or deliberate, necrosis intended to kill off damaged or infected cells. This revelation had generated the hope that by blocking the induction of necrotic cell death by these proteins, it might be possible to prevent excessive tissue damage in various diseases.

But in the new study, reported in Immunity, Wallach's team sounds a warning. The researchers have revealed that under conditions favoring inflammation that is, in the presence of certain bacterial components or other irritants the same group of signaling enzymes can trigger an entirely different process in certain cells. It can activate a previously unknown cascade of biochemical reactions that causes inflammation more directly, without inducing necrosis, by stimulating the production of hormone-like regulatory proteins called cytokines. The research, mainly based on experiments in transgenic mice lacking caspase 8 in certain immune cells, was spearheaded by postdoctoral fellow Dr. Tae-Bong Kang. Team members Seung-Hoon Yang, Dr. Beata Toth and Dr. Andrew Kovalenko made important contributions to the study.

These findings suggest that prior to developing targeted necrosis-controlling therapies, researchers need to learn more about the signals transmitted by caspase 8 and its molecular partners: Since this signaling can lead to several entirely different outcomes, the scientists need to determine when exactly it results directly in necrosis and when it does not. Clarifying this matter is of enormous importance: Tissue necrosis occurs in a variety of disorders affecting billions of people, from the above-mentioned stroke and heart attack to viral infections and alcoholism-related degeneration of the liver.


'/>"/>

Contact: Yivsam Azgad
news@weizmann.ac.il
972-893-43856
Weizmann Institute of Science
Source:Eurekalert

Related medicine news :

1. Scientists find new way to induce programmed cell death, or apoptosis
2. Protein lost in tumors blocks normal cells from being reprogrammed into stem cells
3. Mechanism found for destruction of key allergy-inducing complexes, Stanford researchers say
4. Cancer cells co-opt immune response to escape destruction
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/29/2016)... ... 2016 , ... For those who skip meals occasionally (which is pretty much ... the many new lifestyle diet tips offered by nutritionists Pam Bonney and Priya Lawrence ... radio show. Bonny and Lawrence noted that because proper nutrition, including water, provides energy ...
(Date:4/29/2016)... (PRWEB) , ... April 29, 2016 , ... ... feature Grassland Dairy Products, Inc. in an upcoming episode, airing third quarter 2016 ... century of churning cream into butter, Grassland Dairy Products, located in Greenwood, Wisconsin ...
(Date:4/29/2016)... PLAINSBORO, N.J. (PRWEB) , ... April 29, 2016 ... ... consumer digital and print media enterprise focused entirely on patients with cancer, today ... Mirage, California, was chosen as the 2016 CURE® Extraordinary Healer® for Oncology ...
(Date:4/29/2016)... ... April 29, 2016 , ... Nike Softball Camp at the College ... 24th – 27th for girls aged 10-18. All facets of the game will be ... Clark V. Whited Complex, one of the finest softball facilities in the region. The ...
(Date:4/29/2016)... MO (PRWEB) , ... April 29, 2016 , ... International ... Technology Seminar on May 3 and 4 at the Doubletree by Hilton Hotel in ... is dedicated to marketing and applications technologies for protein ingredients. , At the seminar, ...
Breaking Medicine News(10 mins):
(Date:4/28/2016)... Mich. , April 28, 2016   ... . Diplomat Pharmacy, Inc. (NYSE: DPLO), the nation,s ... has signed a definitive agreement to acquire Valley ... Specialty Pharmacy ("TNH"), a leading specialty pharmacy that ... Van Nuys, California . In 2015, TNH ...
(Date:4/28/2016)... 2016 Dr. ... und Stephen Schmidt werden ... ArisGlobal®, ein führender Anbieter cloudbasierter Softwarelösungen für ... dass neue Führungskräfte zum Team Sicherheit und ... vielfältige Erfahrungen mitbringen.  Dies wird die Geschäftseinheit ...
(Date:4/28/2016)... -- Dr. Vivek Ahuja , ... Ste phen Schmidt Join ... cloud-based software solutions for life sciences, today announced key new leaders ... of insight to a growing business.  This will bolster the company,s ... Phillips joined ArisGlobal in the position of Vice President - ...
Breaking Medicine Technology: