HOME >> MEDICINE >> NEWS
Discovery changes ideas about damage from strokes

In experiments in the laboratory and with mice, the Johns Hopkins researchers found that the chemical prostaglandin-E2 protects brain cells from damage. The finding was completely unexpected, the researchers say, because prostaglandin-E2 causes damage in other tissues and is made by an enzyme, COX-2, known to wreak havoc in the brain after injury. The findings appear in the Jan. 7 issue of the Journal of Neuroscience.

"It's kind of paradoxical, that the product of an enzyme that causes damage is itself beneficial," says Katrin Andreasson, M.D., an assistant professor of neurology and of neuroscience. "It's possible that future treatments for stroke might use drugs to block COX-2 and enhance the effects of prostaglandin-E2, providing sort of a double whammy of protection.

"Prostaglandins have not previously been implicated in reducing damage from stroke, so our finding provides a completely new strategy for tackling and understanding the condition," she adds.

In experiments with individual brain cells and with brain slices from mice, the researchers discovered that prostaglandin-E2 (PGE2), one of many related molecules created by COX-2, protects brain cells traumatized by over-stimulation or by insufficient oxygen. Furthermore, in genetically engineered mice lacking one of the receptors, or docking points, for this prostaglandin, stroke damage was much greater than in normal mice, the researchers report.

"Together, these results provide very strong evidence that PGE-2 is indeed protective in the brain even though it may not be elsewhere in the body," says Andreasson, who obtained the genetically engineered mice from Richard Breyer at Vanderbilt University School of Medicine.

After their surprising discovery, the research team searched for why PGE2 is a "good guy" in the brain. Their experiments showed that stimulation of PGE2's receptor increases production of a molecule called cyclic-AMP, which is known to he
'"/>

Contact: Joanna Downer
jdowner1@jhmi.edu
410-614-5105
Johns Hopkins Medical Institutions
12-Jan-2004


Page: 1 2 3

Related medicine news :

1. Discovery of pathway in learning impairment caused by liver disease may lead to drug treatment
2. Discovery of key proteins shape could lead to improved bacterial pneumonia vaccine
3. Discovery of the oldest remains of a woman who died in childbirth
4. Discovery sheds light on how cancer cells grow and divide
5. GlaxoSmithKline Drug Discovery and Development Research Grant Program 2003
6. GlaxoSmithKline Drug Discovery and Development Research Grant Program 2003
7. GlaxoSmithKline Drug Discovery and Development Award 2002
8. Discovery may lead to new HIV drugs, says Jefferson virologist
9. GlaxoSmithKline Drug Discovery and Development Award 2002
10. "Radical" Discovery Advances Medicine and Plastics
11. Vanderbilt Cancer Center Discovery May Help Overcome Resistance To Anti-Breast Cancer Drug

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:5/22/2017)... ... 22, 2017 , ... Today, Our Urgent Care celebrates the grand opening of ... cutting ceremony. Since opening over a month ago, Our Urgent Care Washington has ... The new Our Urgent Care walk-in clinic is located at 3195 Phoenix Center Dr., ...
(Date:5/22/2017)... ... May 22, 2017 , ... WeightZone Factor a ... empower WeightZone Factor members to track their exercise patterns, monitor behavioral changes, employ ... all on their mobile phones. It also provides social networks for members with ...
(Date:5/21/2017)... (PRWEB) , ... May 20, 2017 , ... ... styled corporate text designs created specifically for use in Final Cut Pro X. ... for all media productions. Pixel Film Studios’ ProParagraph Corporate will deliver a professional ...
(Date:5/21/2017)... ... 21, 2017 , ... Following the tragic and widely publicized death of Rory ... require that hospitals follow a protocol to quickly identify and treat the condition. ... such steps would have saved Rory or anyone else’s life. , Now, five ...
(Date:5/19/2017)... ... May 19, 2017 , ... When Kyle Busch graduates from ... will already appear on two major research studies that could impact the health of ... Matt Daggett, KCU alumnus and an orthopedic surgeon, alongside an international team trying to ...
Breaking Medicine News(10 mins):
(Date:5/10/2017)... Mass., May 10, 2017 Hologic, Inc. (Nasdaq: ... results for the fiscal second quarter ended April 1, ... of $1.84 increased 666.7% compared to the prior year ... resulted in a significant gain, while non-GAAP diluted EPS ... 3.2%, or 3.8% in constant currency terms.  Excluding the ...
(Date:5/10/2017)... , May 10, 2017 Radiology has become ... its costs have also spiraled to the number one ... to radiology than ever before as the most complete ... a patient with lower back pain an MRI may ... reason for pain, resulting in entirely different treatment protocols.  ...
(Date:5/9/2017)... 9, 2017  Demonstrating its commitment to representing ... for the Pharmaceutical Research and Manufacturers of America ... companies will now have to meet new research ... eligible to join PhRMA. "By putting ... sending a clear message that being a member ...
Breaking Medicine Technology:
Cached News: